DE1553271A1 - Device working with displacement effect - Google Patents

Description

Patent attorneys 11 1553271 DR.-ING. WALT * ER ABITZ W- ο March 1965 DR. DIETER MORF 5992 Munich

JOSEPH EARL WHITPIELD Drive j, - York, Pennsylvania, V "" St

Device working with displacement effect

The invention relates generally to fluid pumps, motors, Compressors, blowers, meters and similar devices in which intermeshing rotating bodies are provided with helical, interengaging threads, and in particular novel Features of the rotating bodies, the housing in which they operate, and other associated parts.

Have screw spindle "fluid motors, fans, and the like two or more rotors or spindles provided with a spiral thread, which are axially parallel in a housing, for example are rotatably mounted, their complementary threads interlocking ao, that they form an uninterrupted sealing line over the full length of the spindles or rotors. The case encloses both or allo rotating bodies and the circumferential tip each The container on the rotating body forms a seal with it

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Hence, any flow of fluid must be from the nursing port at one end of the blower to the delivery opening at the opposite end through the spaces hinduoh enter, welohe τοη the threads on the rotating bodies in cooperation with dta housing are included "

They must have threads to form satisfactory seals and pockets and to allow rotation of the rotating bodies be complementary. The one rotating body therefore has a right-hand thread, while the rotating body engaging with this one Has left-hand thread.

Although more than two rotating bodies can be used to simplify the illustration, only two rotating bodies are shown and described. The threads of one rotor are usually located ▼ oll or almost fully outside of its pitch circle. This rotor does most of the compression work and is used as the main rotor designated. The thread turns on the other rotor are usually fully or almost fully within its pitch circle. This rotor does very little compression work, but forms 1η Veatll bsw. a barrier on the path of the main body and is used as a barrier or auxiliary rotor. The main rotor is called sanohaal male rotor and the locking bsw. Auxiliary rotor as the 'take-up rotor · However, it is preferable to use them as the main and To designate locking or auxiliary rotor.

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The main rotor threads are useful during rotation wi «« ine continuous series of pistons, which end by end The troughs glide along the threads of the auxiliary rotor and tin · form a continuous series of pockets that hold the fluid from the Seugendo of the rotors to their exit end. The opening in the inlet end of the housing becomes a suction opening and the opening in the outlet end denotes ale delivery opening. Anti-flow screw screw assemblies of these general ones Construction and usually reversible, by which reversal the punctures that openings are reversed, but the subsequent drilling friction is directed to a device which is more effective if βie is operated in a certain direction and in general not reversible 1st.

Devices of this general type have long been known and are used for various purposes. With all these well-known However, there are certain very serious limitations to devices. For example, certain thread forms do not provide continuous seals between the rotors or between the Rotors and housings, so that leakage losses occur. Others have poor performance for a given construction size, while still others have a rotor shape in which the threads of the one rotating body are insufficient for the intended purpose are rigid and several known thread forms are very difficult to machine accurately. The most serious deficiency in the early

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Heren rotor designs consists in the fact that they have sealed pockets Forming promotional ends that have an excessive pressure, temperature and Making Noise, Certain fundamental advantages of screw jack assemblies but are so desirable that they have largely prevailed despite their known shortcomings «

Ub a device of this kind, which more the ideal ideas corresponds to, au received, the waterproofing line must be between the rotors itself as well as between the two rotors and the housing during all rotation periods during the rotation of the rotors without interruption stay, the bores and their skins are rigid »the form of the rotors must be such that they can be manufactured accurately and economically and no sealed pockets are formed and leak openings arise when sioh the rotors turn. All of these desirable goals can be accomplished with the following described rotors can be achieved

The number of thread turns of each rotor is optional and depends on τοη the speed, the pressure and other considerations from «Gew & hnlioh is obtained for very high turning speeds and high internal compression ratios chosen a rampant number of τοη threads. The other extreme would be two threads on the main rotor and three or tier on the auxiliary rotor. Each of these combinations is workable and has b'estimate advantages over other combinations. However, it will ·. assumed three threads on the main rotor and animal threads represent the best and most universal combination on the auxiliary rotor.

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The following description is therefore based on such a combination directed, but the invention is not limited thereto.

When properly designed, the complementary threads of the rotors work softly like a set of gears and the main rotor can be used to drive the auxiliary rotor. However, since in use the rotors usually work without lubrication on the surfaces of the threads and because of the high speeds with which devices the. work described, it is generally expedient to use control gears and rotors with a certain fixed play, so that the rotors work in a laterally controlled relationship and do not touch each other or the housing * It has been found that when the rotors each other or the Touching the housing, the friction between the parts absorbs heat and leads to breakage, unless measures are taken very carefully which allow the parts to wear out without generating heat or exerting pressure. Ee is therefore wiohtig _f rigid "parts to be used, which" can record a beträohtliche performance without si "bend SiOH or receive 11 · η contact with other Φ". Furthermore, if the rotors are not in contact with one another or with the housing, they are not exposed to any wear. The device according to the invention has essential advantageous features, ie the rotors require no lubrication and are not subject to wear under normal conditions.

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The main object of the invention is to provide rotors which have an arc keel and appropriate sealing at the foot of the fiauptrotor threads.

Another main object of the invention is to avoid the see pockets that normally form directly at the conveying end of the rotors before the expiry of the same

Another object of the invention is to provide ron broad unterbreehungsfreien and highly effective sealing lines.

Another object of the invention is to provide rotors that Form pockets »which run out on Hull without loss of liaison *.

Another object of the invention is to provide a device in which both rotors can be effectively cooled by the liquid circulating in them.

Another object of the invention is to provide an auxiliary rotor with threads that are well supported against deflection.

Another object of the invention is to create an auxiliary rotor, of a thicker wave than was previously possible without any reduction the diameter of the main rotor along its length can accommodate

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Another object of the invention is to provide a main rotor with an inclined ridge at one end and a complementary one inclined part at one end of the main rotor chamber dee Housing.

Another main object of the invention is to provide a device of the kind mentioned, which are suitable for higher · lathe and Press as similar devices of known type are suitable "

Kin welter The aim of the invention is to let a blower, if the conveyor belts run out when they are on the center line sw! see the rotors approaching.

Another object of the invention is to provide an apparatus of the kind mentioned, in which the outer end of a suction pocket Do not wipe between the conveyor pocket and the conveyor opening will.

EIa further ·· The aim of the invention is to create τοη rotors Spitien, dl · aioh veraohleisaen when they come into contact with the housing • Hold without a · mechanical malfunction, but that normal game is maintained.

Another object of the invention is to provide rotors with wide sealing lines id high pressure area.

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Another object of the invention is to provide rotors old all of the aforementioned advantages and threads of fully * brolled Shape.

Another object of the invention is to provide Eo * gates with wear strips on the tips of the rotor gB windings and a sealant material along the slip band, among others I'm preventing Leoken au.

Another aim of the invention is to create laelnsae catching old rotors provided with screw thread «which convey the air taken up in their suction tubes, whereby no splelrluaa and / or rooms for renewed relaxation • lad »

Other Zlela and gate parts of the invention resulted in si oh name of the nice · » The following description of several exemplary implementation foraea In connection with the accompanying drawings and «was selgeai

71g · 1 AIAA view in longitudinal section of a AusfUhrungsfora a he "findungBgsaäasen Sohraubanspindalpuape bsw · ainae compressor _(being guided is section through the Achsan represents Schraubenspladela bsw of the rotors along the line AA in Fig. 2. |

Fig. 2 is a view in longitudinal section through the axis of the main rotor

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after the line B-B in Fig. 1 perpendicular to the .Ansloht la Fig. 1 «where the suction and delivery openings are shown are;

J shows a perspective view of a rotor according to the invention couple;

Fig. 4 is a partially! and figurative end not one rotcrpaares known type, which the formation of a sealed Pouch at the end of the conveyor shows, with the end v & od, which completes the sealing of the bag, does not is shown;

5 shows a partially diagrammatic end not known Rotor pair with arcuate threads almost in full Kingriff, which shows that there are no sealed pockets aa conveying end, since the non-inclined aoroale End wall does not seal these pockets)

Figure 6 is a side view of two intermeshing rotors with arcuate threads over their full length »as in Fig. 5, which openings and a Leok path aa point of intersection the (JewiRde-Gang shows;

7-12 diagrams of botore habits according to the invention from a directory listing the preferred benefits

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together with the reference numerals of the different "" Does includes gate rotors, such as used in the following Besohffeifeoaf, wherein Figures 7 and 8, the FÖrdereuden d ·· main and help rotor show., Fig. $ and Io Sohnltt · by the uneven Conveying parts of the main rotor w »dee the auxiliary rotor according to the line AA in flg. 33 and BB la Fig. 34, where Fig. Io is complementary to Fig. 9» «thread Fig. 11 and 12 the suction ends of the main and auxiliary rotor · demonstrate;

Figs. 13, 14 and 15 are diagrams showing the positions of only the JflrdeT · ends of the rotors show when the latter are about Ao » 30 ° or 12 ° before the full procedure {

16 dj, a conveying ends of the rotors in full engagement as well as a View of the housing in section along the line C-C in Fig.!}

Fig. 17 and 1Θ diagrams showing the positions of only the FSrdersmdta of the rotors show when calibrated about 6 baw. 12 & aoh are in full intervention!

19 and 2o are sectional views through the uniformly developed Divide the rotors, if r.I the latter about 52 ° before the full intervention or are in full engagement, a toilet of the housing is also shown}

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Fig. 21 is a partial view of a pair of rotors in section through the

evenly rolled section, the top edges of the helferotora are rounded and the rounded edges are centered on the pitch circle;

22 shows a partial view of a pair of rotors in section through dta

The same section, with the top edges as help - rotors are rounded and the rounded edges are completely outside the pitch circle!

23 shows a part of a pair of rotors in section through the

smooth section, with the web at the Spit ·· d ·· Help rotors for the formation of anti-wear tires line * * * Head edges are cut away and the main rotor is complementary;

Fig. 24 formed at the intersection of the housing chambers.

opening when the head edges of the auxiliary rotor · in somehow «? Way are broken;

Tig. 25 the spitue «ines main rotor threads β sit in ··

wear strips along each of its head edges and a softer sealing material that wipes the roughness Fills in wear strip *

Fig. 26 shows the softer sealing material through the inclined web

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the main rotor continued;

27 shows, on an enlarged scale, a view of one of the knurled edges dte in Fig. 22 auxiliary rotor thread a, gives way to «ine sharp overlap for fun! tabwälzung and an aohaalen Wear tires;

28 shows an enlarged measuring stick one view of one of the head edges an o auxiliary urotor thread with a rounded overlap for B0 / jenabwälwung and an occasional Versohleifiatraifen;

29 and 58 partial assemblies of different rotor shapes, where the rotor pair is shown slightly warmed up and not rotated for the sake of clarity. Fig. 29 and 3o "as intrinsically · Fjord edge of a Eauptrotorgewindee or an auxiliary rotor" gewiiides, where custody of the inclined web of the ^ auptrotors tob the tip de ο thread of half the height dee extends the thread while the inclined Muldenabaohnltt to dee Hilfarotors from the bottom of Re-sowing of the hollow extends over half the depth of the hollow. 31 and 32 partial view in longitudinal section through a faup rotor bark or an auxiliary rotor thread on the other. Fördarei.da. where the angles of the inclined ffftejes of the main rotoT and the inclined trough of the Hj] f ^ rotoTs are relatively steep

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Flg. 35 and 34 are views similar to Figs. 31 and 32 with the exception that the angles flea inclined ridge and the trough section are relatively soft. Fig. 55 and 56 are similar to FIGS. 31 and 32. Old views except that the change in the shape of the main and auxiliary rotor threads is sudden and not inclined Web or inclined Huldenabschnitt is available. Fig. shows the conveying end of a main rotor thread, in which the inclined land extends from the tip of the thread to less than half the height of the thread, while 3a shows the delivery end of an auxiliary rotor in a complementary manner The main rotor of Fig. 37 is inclined.

39 and 40 are diagrams © of cross sections of the main rotor and the auxiliary rotor according to FIG. 33 baw. 54 near the line A-A in Fig. 33 baw. B-B in Fig. 34.

41 is a diagram of the threads of a rotor pair, in which * the main rotor hub smaller than the pitch circle of the Hsuptrotore is and the outside Durohiiesser of the Hilferotore is larger than its pitch circle, the helper rotor thread has sharp head edges and in two different Positions with reference to the main rotor thread is indicated.

42 is a partial end view of a main rotor thread;

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which shows the amount of metal to be removed after the inclined web has been cut, whether or not there are curved arcs ₍ which form the auxiliary srotome hollows.

Fig. 43 is a partial view, on an enlarged scale, of the head edge of the auxiliary rotor shown in Fig. 28, in which dl · The curved fora of the rounded head is more clearly visible » put iat.

Fig. 44 is a fragmentary view, on an enlarged scale, of another Fora of the arched head edge for the help rotor.

It is important to mention here that the drawings are exactly aafl * et common representations are, τοη which Tiele after templates from According to the invention rotors are geaeichnet, in particular eingioht-11 oh the sectional profile diagrams of the Botor thread. I am interested For the sake of accuracy, hatched lines have therefore been omitted from many figures and diagrams.

In the description and in the claims, terms such as "troughs", "pockets", "outlet ¹⁴ ," steaer gears * and "control" are used, so that the following definitions are given below.

Troughs - the hats cder interspaces suiechen the Qewindegangen

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each “rotors can be referred to as troughs” and are “Without broaching, they are similar to the teeth of ordinary gears. the Side surfaces of the troughs can also be ale flanks or sides of the Hotor thread can be designated.

Taeohen - the transition from a trough, each rotor together forms a pocket with the walls of the Cehäueekaiamar. It binds the pockets »welohe the fluid tob sucking sum conveying end of the rotors promote *

Leaking "this is the designation which is used in conjunction with the old Taeohen or Mule η, when they reach the conveying end of the rotors and in their OrSe" · * decrease "d" h · overwind or run ". Aa suction end of the Rotors form sioh old Taeohen! Which eioh constantly fill a with fluid until they reach the Mixii ·· Ie size when eioh the rotors turn. They are then separated tob the suction opening and begin to decrease in their oroeee and to compress the fluid contained in them. It takes a long time for compression to reach the edge of the front opening when the flow medium is conveyed; after the gate at the edge of the conveying opening there are no more sealed pockets, but the troughs continue to move forward at the conveying end which they disappear or "leak".

Stetter gears - for synchronizing the rotors and vm them in

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to keep a timed relationship to each other * «earth gears are used. That play between the rotor threads should be greater than the play between the gear teeth if contact between the rotors is to be avoided during operation oo2 ^M to 0.004 "), while the play between the rotor threads can be 0.5 κη to l, o mc (o, o2o" to o, o4o ^>! ) depending on the size of the device. Therefore, with correct control, the Botor threads cannot come into contact with one another, since they are kept at a distance from one another as control gears

Control - The control is the activity of setting the steering gears in relation to the rotor threads in order to eliminate any contact with these threads. One of these Steuercahnradtr is usually made separately from its hub and is bit adjustable with respect to this in order to facilitate the control process in the susaamsngebauter gate direction.

Wis. L and 2 show in which the invention, for example, in Application to a screw pump or a compressor da * 1st, the housing Io of the device contains two parallels International chambers 12 and 14, which are side by side and parallel are arranged and one inside the other to form a common Kaasar pass over, the cross-section of which has approximately the shape of the number θ. That Housing has load-bearing feet 11 and a molded end wall 16 provided, which form one end wall of the chambers 12 and I4

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det. The other end of the housing is formed by a removable wall to allow the insertion of two mating screw-shaft rotors 34 and 36, which are arranged so that they operate within the rotor chambers .12 and 14. The rotor 34 is used as the main rotor and has a left-hand thread in the illustrated embodiment. The rotor 38 is referred to as a locking or auxiliary rotor and has threads _r which are complementary to the "Jeiligen des Heuptrotora" ie * right-hand.

The detachable end wall of the housing · is made of two parts in the form of reentering heads »the self-centering bind · the reentering head 18 for the Bllfarotorkammer 14 is continuously circular on its outside · endurohmeseer and fits into the chamber without play the main rotor annulus 12 is also circular on its outer diameter with the flood that it has a concave niche "which is formed on a support surface" so that it can be inserted into the housing next to the re-entrant spigot of the auxiliary rotor. The re-entrant heads 18 and 20 are held in the correct position by a head plate 22. The housing end wall 16 is provided with two cylindrical bearing bores 24 and 26, the main rotor chamber 12 b * v. to the auxiliary rotor chamber 14 are concentric. In the same way, the re-entrant heads 18 and 2o jnit with cylindrical bearing bores 3o and 28 which are arranged centrally in their respective heads.

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Each of the cylindrical bearing bores 24 * 26, 28 and Jo is provided Bit • iner bearing bushing 32, which may for all bearings ähnlioh s' in * The main rotor 54 is firmly seated on a ¥ .ell · 36 and is duroh di · bushings 32 in the Bearing bores 24 and 28 held in the main rotor chamber 12 bitterly. The auxiliary rotor 38 is also firmly seated on a cell 40 and is held in place in the auxiliary rotor by the bushings 32 in the bearing bores 26 and 5.

The construction rotor shaft 36 carries a control gear 37, while on the A hub 39 is attached to the auxiliary rotor shaft 40, on which the Bllfs * rotor gear 4I arranged so as to be adjustable in a well-known "ice" is. With the help of this setting, the Hotor threads controlled accordingly.

From the end of the gear wheel of the housing is a lateral conveying opening 58 and one since high suction opening 60 diagonally opposite on the inside of the housing. these openings are described in more detail below.

The ^s otorkaMBern 12 and I4 and the re-entrant heads 2o and have a slightly larger diameter than dl · Hotor 'n and 36, to ensure that held the latter necessarily mittif and old one Mindestepiel can work · There are simplicity ordinary bearing bushes 32 shown,

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· ■ Jedooh can also use suitable bearings to accommodate · both the radial ale also of the pressure loads that result in such a Yorriohiung occur, are used.

As shown, the main rotor 54 has three circumferential directions extending axially at equal distances from each other Bpiral thread turns 62, which are formed similarly and the exact form of which is described in more detail below. Scr illustrated Hilfarotor 38 is with four in Uafangerlohtuag he » stretching «..«. axially equidistant from one another spiral threads 64 are provided, the exact form of which follows also described in more detail was «Ba the main sisl dex Ir · finding la the creation of a theoretically fully conceived Ibdlohttt & f and in avoiding sealed pockets aa Ffirdertada dar Ietoren exists, the corresponding part of the invention, i.e. Asjy the part concerning the Boteren, especially in Yerbiataßf old Fig. 1, 2, 3f 4 »16 and 19 described.

In statements of the kind mentioned, under a "theoretical perfect seal "a tight * barrel seal ait of a fsctsa beetiiuiten game su understand. That is, the game! Wipe the Botor threads itself and between the tips of the rotors and the Wardrobe walls are used during the manufacture of the Yorriohtuaf fixed and changes nioat during normal operating conditions beyond a certain allowable amount. This built-in

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The game can be called "Raumäichtung" or "Engea Laufspiel" "earth. With carefully designed rotors tffid precisely machined Oewlndegänge the running game can have an ulndeetasfi and jets over all boundary edges of the pockets during all rotation periods essentially the same »

In the case of the rotors produced by the hobbing process in FIG Top edges 42 of the auxiliary rotor 38 as a seal forming placed, the rom foot 44 of the thread of the main rotor bie tu des «, sen head edge 46 is free of interruptions. In the same "form" the head edges 46 of the Eauptrotors 34 an interruption-free seal Over the trough 68 of the auxiliary rotor. There is therefore no opening »wipe the rotor threads at the point where the tip edges 42 and 46 of the rotors meet each other to form the intersection 5o hit (Figs. 4 and 19). Together with the httnsekaaer ’surrender 52 (Figs. 19 and 20) form the red threads and the Oehäueekaamerwand a theoretically Tollkoaaene seal and the pumped fluid is against leakage as the Torderen Hoohdrucktaschen su the trailing Viederdrttekta * eohen sealed. ·

^In the rotors according to the invention described below, there is a seal 5o at 52 (FIG. 19) over the entire smooth rolling section 54 (FIG. 2). Such a seal is very desirable in the pressure area and forms a very important part of the invention. This theoretically perfect seal forms

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det siofa at the suction end of the rotors and progresses with the Tasohen eur delivery opening, τ, -enn Bich turn the rotors. Since no "LeokSff- t mrm" wipe the front and the trailing Hochdriioktaashan Kiedea -,...; There 'isktaBohen, a real adiabatisoher internal pressure m ^ tiohb which OTvQneont Aehr for a good efficiency is ·

Fig. 5 and e incline rotors with arcuate threaded ring®® over their full length. Such rotors are in the USA patent 2,622 = ^ 8? described «fia evident; If there is no overlap in the rotors according to Tlge% ■ with arcuate threads if the threads intermesh, as in the case of the rolling rotors at 9 ^ in Fig. 4, "This has the result that a leek path 45 arises" which is continuous from the conveyor end © sum Satsgend® sretreekt wbA «iaese pay attention to adiftbetieehca Druek T @ rhind @ rt« The in Pig. 6 arrows 47 drawn with του »vegesogenic lines show these lekpfafl en the front of the rotors. As has also been shown, if the bots have more than a certain angle of contraction, the licking can follow a trough around the eotor, whereupon the suckling opening can take place immediately. The yerdeokte I * eok "path is indicated in Fig. 6 by the dashed arrow" 48 * In such rotors, a direct Leok path is therefore built in, so these rotors with arcuate threads have a small looping angle to eliminate this direct Leokjpfadee are built «they cannot maintain a high internal pressure · However, it takes place regardless of how small the? ■ ·»

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loop angle is always a licking from a high pressure pocket see the following pockets instead, as indicated by arrows 47.

As can be seen in FIG. 5, the shape of this is arch-shaped Threads such that they do not form sealed pockets at the conveyor end, which is of course an advantage. With this type of construction however, the same opening 45, which vents the pockets at the conveying end, also the Leok path from the conveying end to the suction end. Although the leakage loss due to operation with very high speeds can be reduced, this is also disadvantageous Ltck opening is in de? U.S. Patent 2,622,787 in the column described in detail in which it is mentioned that Hoohdruok-BtrBsunitt ?! may leak back to the trailing pocket. However, the cited patent does not state that a Leoken take place directly between the conveying and suction openings can and takes place, as in the present figure "6 by the solid and dashed arrow" 47 and 46 in Fig. 6, when the looping or enveloping angle! is sufficiently large, including a high internal compression »u erseugen, as is necessary for most devices of the type mentioned is * This is a very serious limitation if a high one Efficiency is essential.

In Fig. 6, if the judges are opposed to the »-

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The arrows indicated work * the delivery opening is on the front side aa reohten end and the suction opening on the back at the left end. The fully drawn arrows 47 show the leak path running over the front and half the way around the main rotor, while the dashed arrows 46 show the path of the leak on the hidden and rear of the rotor. A leak path therefore runs continuously from the delivery opening to the suction opening _t «as su leads to a loss of efficiency, which is avoided by the invention.

Originally, the Whitfield blower according to the US patent 2.287.716 was developed to avoid the Leok path that occurs with arcuate threads. As in the present Fig. 19 soaped, "see with rolling" threads no leak opening at the intersection 52 of the GebiLueekaomern, which is very desirable in the compression area. Sa full abgewälste rotors no natural Shitlttf processing or have LeokÖffnung "they form a sealed However Taaohe% (Fig. 4) at the end of delivery, which let a" grid * aohteil. As mentioned, the end wall which completes the sealed Taaohe is in Pig. 4 not shown.

The deficiencies are eliminated by the rotors according to the invention be used in the arcuate rotor corridors according to the USA patent 2,622,787 and with the oblate rotor threads according to the USA patent specification 2,267,716 exist »while the advantages

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both designs are maintained

Avoid the rotors shown in U.S. Patent ahrift 2,922,577 the sealed pocket formed by the rolling threads, and also avoid the pocket formed by the arcuate threads formed leak path. Ea has been found, however, that they are difficult to manufacture precisely and their design does not Unit performance is reduced. There is a real rolling movement between the rotors at the end of the conveyor, i.e. the one cone Rolls on the other essentially at the same peripheral speed. Duroh made a cutter that was in the shape of one of the rotors is made «the counter rotor is therefore not milled, as there is only rolling contact between the rotor and the milling cutter.

As shown in U.S. Patent 2,792 * 763, must be used to manufacture wipe a relative movement of each rotor by rolling a rotor and a milling cutter together in a controlled ratio the milling cutter and the surface of the rotor to be milled take place or there is a difference in the peripheral speed.

The fact that the threads of the rotors described here fully by rolling a rotor and a suitable one together Milling cutter can be generated in a controlled ratio »um Obtaining a theoretically perfect shape is a very important improvement. It has also been found that the

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sharp sealing edges, which are described in UfA patent 2,922,377 are described, result in an unsatisfactory sealing state and that the lengths of the sealing lines are longer than necessary are. In the rotors according to the invention, the sealing lines are shorter sad they have a greater width and are also more effective «

In the USA patent 3.138.II0 a further rotor shape is disclosed, which also avoids the mentioned sealed pockets 56 and the leakage openings 45. However, the relief opening in this design has its full size only at the extreme end of the red - "* and its width at the intersection between the rolled part and the arched part is reduced to zero high speeds too small · Further, the ^a auptrotor and the auxiliary rotor are not fully shifted in this case and the outlets cross-sections of both rotors are formed by a copying process according to a guide rotor or a template. such a manufacturing-up method brings tfngenauigkeiten in and is compared sur rotating passing slow and expensive.

The rotor design according to the invention represents a significant improvement in the simplicity of an extremely accurate 9s » and enables higher speeds and a higher degree of efficiency than the older designs.

For rotors with arcuate thread lengths, for example at

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those shown in the aforementioned US patent specification 2,622,787, the opening that vents the pockets is of the same size as the opening at all thread intersections back to the suction end. As a result, if the thread Shaped to form a pink vent opening at the end of the conveyor is, the leak openings to the trailing pockets are also large, so that excessive leakage takes place.

üa to vent the pockets at the end of the conveyor and not at the same time To generate a leakage path, the invention provides rotors which the compression portion has a shape different from that of the step portion is different, in that each section of the rotors is designed for its own particular purpose. The earlier described Rotors also have a shape which can be easily rolled and which can be regulated with regard to the exact size and shape is and also represents a balanced design, which is a significant improvement over the previous construction areas.

As can be seen from FIG. 1, the rotors work in the directions indicated by the arrows, with the suction opening 6o aa drive end being on the opposite side, while the exit or delivery opening 58 is diagonally opposite at the gear end on the facing side Suite is provided as indicated in FIG. Since both rotors from the suction end over ¹ fully rolled over the uniform section 54 to the non-uniform section 55

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slat, there are no leak openings at the intersections 5o of the Red threads and at the intersection 52 of the housing chambers (flg. 19) available.

Flg. 3 is a diagrammatic view of the rotors alone shown in engagement with one another as viewed toward the exit end. The difference in shape between dtn exit and the Verdlchtungs- or Dev & larteilen of the motors results aue a comparison of FIGS. 5 and 4. Aue Fig. 3 1st seen that when the Rotorgevindeg & length in full engagement elnd _v as shown, the Main rotor thread 62 does not completely fill the grace 66 of the auxiliary rotor 36 and there is only a seal in the middle of the main rotor thread, since the auxiliary rotor bowl 68 is wider than the thread thread 62. This condition is caused by the position of the pitch circles with reference to the rotor thread lengths, which will be explained in more detail below.

FIf. 7 and β are schematic end views of the outlet ends of the ^ auptrotors 34 and the auxiliary rotor · 36 and contain the names of broken parts. Fig. 9 and Io are similar soheeatieohe Sonittanslchten of two rotors, with the cuts close to the Line A-A in Fig. 33 and along the line B-B in Fig. 34, while FIGS. 11 and 12 show the echematic end approximations of the suckers of the Are motors that show the shape of the rolling parts of the threads.

" ²⁷ " 9098 88/0613

BAD OBSGlNAL

15 shows the exit of the rotors when the owlndegans roll into engagement with one another, the seal being along the head edge 42 of the auxiliary rotor thread and at the foot 44 of the thread of the main rotor. They do not in any way restrict the conveyance of fluid from the trough of the auxiliary rotor solder. Fig. I4 is a view similar to Fig. 13 with the exception that the rotors have been rotated by about 10 ° zma full engagement.SI Threaded gates on the main rotor. Ea still exists as a completely closed Taeohe. In FIG. 15, the rotors have rotated a further 18 ° and are about 12 ° before full engagement, at which point in time the rolling arc 76 of the main rotor thread is congruent with an arcuate part 85 of the rapid rotor trough 68, so that a very good one · Abdiohtung is preserved. The outlet channel for the fluid let leaser is still open and there is no inclusion. Br · to fell a congruence between Abwälzbogen 76 of the main rotor thread turn and the arcuate side 85 of the trough of the auxiliary ·· rotor as in Fig. 15 gazeigt that Radiuepunkte, d _t a must. dl · KrÜ bus centers, of the two arches coincide. Sa dl · partial circles of the two rotors are not tangent, where the radius point of the arcs 76 and 85 must lie »the radius points of both rotors cannot lie on the partial circles of both rotors. For example, the radius point in FIG. 15 could be. for both rotors lie on the main rotor pitch circle if the rotors are exactly in the

909886/0613

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W-5992 *

position shown. The radius point for the auxiliary rotor would therefore be slightly outside of its pitch circle

FIG. 16 shows the outermost parts of the rotors on the conveyor wheel of FIG The pump and the housing in section along the line C-C in FIG the position shown is the main rotor thread 62 in full engagement, with immar still no inclusion etatt » takes place, as the seal is in the lütte of the main rotor thread and the emergency rotor trough 68 does not sit congruently · The dash-dotted Lines öo represent the edge of the conveyor opening 58 1 & of the housing end wall 16 (Figo 2) represents those parts of the ends of the The rotors to the left of the line 8o are covered by the end wall 16 the parts to the right of line 8o are not covered. Since the last Area forms part of the outlet opening 58, becomes a partial get axial flow.

In FIG. 17 the rotors are shown about 6 ° after the fully engaged position and there is always no inclusion. In this position, the remaining pocket is very small and confusing. this completely at a further threat of 6 °, as shown in FIG. 16. In FIG. 18 a part 76 of the thread turn of the construction rotor is congruent with a part 83 of the auxiliary rotor trough, but on the opposite side from that shown in FIG. As can be seen, the threads on both rotors are completely rolled off, even if an evenly and unevenly

»29-

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cut is present.

For example, the outer diameter of the auxiliary rotor and the webs at the foot of the main rotor threads first in any appropriately finished. These surfaces cannot be rolled off as there is no relative sliding movement between them when the common threat takes place. After the mentioned When surfaces have been finished, each rotor can be completely machined created by "grounding" from amines with a milling cutter "weloher has the shape of the counter rotor, and in timed terms is never unrolled. The rotors could be pre-machined with a small upper size and then cut to the exact size and shape Finishing process are rolled off. A compensation for them Cutter wear can be achieved by slightly changing the control between the cutter and the rotor Such a method of finishing the rotors results in a theoretically perfect set of rotors, since such milling cutters are hobbing shapes controlled by the control gears and there is no dependence on the accuracy of the shaped milling cutter

In Fig. 19 are the rolled parts of the rotors etva. in the same position as the ends of the rotors in Fig. 14 · If Fig. 19 represented the exit end of the rotors, 56 would be a sealed pocket like the one shown in Fig ⁰ from the in Flg. 19 roped

909886/0613

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Rotated position and are in full engagement «Si · sealed Bag 56 has been wrapped up in its size, however iaaer still available. A part of the housing Io is shown in Figs 2o shown on the representation of the housing chamber overlap 52 »

Fig. 21 shows a modified pair of rotor sections at which the! pitch circle 84 of the auxiliary rotor J8 is smaller than its outer Durohiaesser is, while the pitch circle 86 of the main rotor · 54 is larger than the diameter of its property. Every head edge of the Auxiliary rotor threads (compare 42 in Fig. 12} are through iron Radius broken away, which forms an arc.95, whereby the a End of Bogenu is tangent to Auesenuiafang of the rotor, while the most opposite end of the arc is not tangent to sur Page 79 of the rotor mouth 68 is "but it intersects with the formation of a sharp edge 82, so that a so-called Punktabwiliiunf is obtained. The property of the main rotor shows the foot of every wind a rounding 96 appeared, leading to arc 95 a »auxiliary rotor ^ ·» Windswang is koepleeentir and old during these periods ^ every rotation works congruently, as shown in Fig. 21 In the embodiment according to FIG. 21, the pitch circle 84 is the Hilferotora about in the middle between the outer catch of the Eo * tors and the ab * älakanten 82,

FIG. 22 shows two Rotorabaohnitte, which is soaped in FIG dt are similar except that the pitch circle 84 of the auxiliary rotor

-31-

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runs through the rolling edges 82 and the main rotor hub complies mental iet.

Si · rolling edges 82 of the head edges 42 can within the Kreieee 84 des Hilferotore lie, but do not have to be outside of the same or whether there is a leak opening, as in 71g * 41 in which the top edges 42 outside the pitch circle 84 lie. When these head edges the sides of the main rotorg * wind * glaf describe, they break the sealing system in the seam · de · Of the main rotor threads during a certain period · »j · - of the revolution and form leakage openings, as indicated at 98 By rounding off the corners of the auxiliary rotor gears accordingly of the pitch circle, as shown in FIG. 22, this trailing son can be avoided. However, rounded head edges form “in” a Leok path 88, as shown in Fig. 24, which leak path is similar, jffiooh is smaller than that which is produced by the arcuate threads according to FIGS. 5 and 6.

The webs 7ο of the helper rotor threads are presugaw ·! ·· τοη Equal latitude over the full length of the rotor ·· Furthermore takes place no change in the head edges 42 or in the ibw edges 82 takes place over the full length of the rotor. In the same way • the webs 74 are at the foot of the threads of the main rotor of of the same braite and shape over its full length * Although the Bridges on both Roteren over the uncomfortable section 55

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W-5992

(? ig · 2) could be made different »for the sake of simplicity in production it is preferable that these webs do not change over the full length of the rotors. Others are the webs 72 at the tips of the main rotor threads with the uniform rolling section 54 and then change continuously over the non-uniform section 55 to form the inclined webs 73.

Experience has shown that the wide webs 7o des Help gates do not fail if they make frictional contact Housing received »if their width and area are not in is reduced in any way is greater than is permissible for good efficiency. In Fig. 27 and 28 have the center of the auxiliary rotor web 7o on a proportional basis shallow depth bo cut out that a narrow wear strip 9o near each head edge of the rotor thread remain. If this wear strip 9o correctly and without Difficulty is to be worn out, it is necessary to defi tr 'relatively narrow and low and so from the head edge de Eotors is stored away that when heat gets old during contacts the housing at a high speed, the generated heat migrate into the main part of the rotor and can be diverted, without the rotor suddenly expanding and wearing out a lot of material and the system stopping. As it is beneficial

"909886/0613

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W-5992 $ l |

If you lay the wear strips 9 ° away from the head edges of the Botor threads, the head edges must be modified in some way to achieve the result. This modification or alteration must (* Pig 24) give the absolute minimum opening ΘΘ nut and further lead to the optimum shape of the door main rotor rounding 96 (Fig. 21 and 22). The sloped design in FIGS. 27 and 28 provides all of these desirable results, while the complementary rounding 96 on the PuB of the main rotor thread reinforces it against fatigue fracture as a result of a sudden change in cross-section.

The forms of embodiment shown in FIGS. 27 and 28 are the same the exception that in Fig. 28, in which the precautionary form is set, the rolling edge 82 is rounded instead of sharp, whereby a Bogenabwälaung obtained on the construction rotor threads will. The formation of these rolling edges is very important and represents an important part of the invention. It is very desirable that the Yeraohlei strip 9o away from the head edges of the windings * u to lay without creating an undesirably large opening 88 (flg. 24). This can best be done with a relatively large radius Gesohehen, tangent to the sum web 7o and to the rolled-off side 79 the depression 68 is not tangent. This results in a very sharp edge 82 as shown in FIG. In Fig. 28 this sharp edge is broken by a relatively small radius, the one results in better sealing. The edge of the Qfewindeganges in the wing. 28

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is therefore formed by two arcs τοη different radii.With aa best from the enlarged representation in Pig "45 is achieved, the arc 89 of a larger radius is tangential only to the point 7o," honoring the arc 91 of smaller radius both on the arc 89 as well as the rolled side 79 of the trough 68 is tangential. This rounded roll-off edge gives a better seal and its exact oreaee is easier to control and maintain than a sharp edge. At point 94 in fl. 28, the head box of the rotor thread represents the gateway to its modification · This means that "very little metal needs to be removed to achieve these desirable results" and that the leak opening is Θ6 to the greatest possible extent.

continue «Fora a rounded or arched Abw & la» The edge for the auxiliary rotor is sloped in Fig. 44. With this abbot In the form of the head section 94 of the rotor thread turn a perpendicular sum Steg cut away «so that a precisely delimited outer edge of the Terechleißatreifen · 90 is obtained and the Abwftlskante through eiata arch 97 vox! small radius is formed from which the " End tangential to the rolled side 79 of the trough 66 iet, while the other end ends at the foot of the Terschleißetrelfens 9o.

Fig. 23 shows the worn tire bodywork in application to the main rotor. The middle of the Rotersteg 72 is the formation of a relatively flat hat and a total of a flat hat

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BAD ORSGLNAi

Wear strip 92 cut out adjacent each head edge 46. Due to the shape of the main rotor thread, these are wear strips well stored and any heat generated by friction is easily diverted into the actual rotor

The flat hats in the webs 70 and 72 of the auxiliary rotor and Main rotor threads are filled with a suitable material 93, that forms a seal and also calibrates when frictional contact with the housing occurs. The sealing material 95 is selected according to the fluid to be pumped, however, it should be sufficiently soft so that it borrows exactly the required amount without smelling against frictional contact with the housing Yerachleißt. When the fluffy hat in the helper rotor threads is not filled, a Leoken would occur, as can be seen from FIG. Because the rotors are helical are, any end-to-end leakage as a result of the mute would be a direct lever τοη the pressure side on the suction side of the pump "*

23 shows a method of avoiding the dietary material 93 in the hats of the helper rotor threads in the way · »that dl · Raven of the main rotor complementary to the wear tires as Auxiliary rotor is grooved. Those shown in Figs. 27, 28, 43 and 44 are weighted However, designs are compared to the design shown in FIG be careful, since the latter is difficult to manufacture and no « Support for the sealing strips aa auxiliary rotor Torhaaden

~ ⁵⁶ "909886/0613

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Vf-5992

Flg. 26 shows a main rotor thread, where the view « material 93 through the inclined web part 73 to the conveying end of the rotor is extended.

The position and size of the wear tires 90 and $ 2 and the shape, size and shape of the modified head edges and the auxiliary rotor form an important part of the invention.

Figure 29 shows an end view of the conveying end of a main rotor thread according to the invention, in which the inclined · web 73 runs from the web 72 at the tip diagonally near the bottom to a point, at which its height is about half the height of the same Part of the thread is. As can best be seen from FIG. 2, the length of the inclined webs 73 is less than that normal axial dimension of the delivery opening 58. The inclined web 73 is arcuate in cross section and its centers of curvature lie on the axis of the rotor. The one forming the inclined web 73 Radius is shortest and at the extreme end of the rotor

reaches its greatest length when the web 73 meets the web 72 The tip of the thread cuts. The angle of inclination d ·· web 73 is complementary to the angle of the inclined wall 79 (Fig. 1 and 2), which forms part of the rotor gate housing Io. at In this embodiment, each rolling arc 76 is tangential to 'Ridge 73 at one end and tangential to the rolled-off flee 78 of the thread turn at the other end, and at the extreme end

-37-

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ORIGINAL BATHROOM

W-5992

The rotor is essentially its center of curvature Partial circle 86, shown, with the length of the bedims in the Skins about half the height of the thread a

Although the drawings show the thread turns at the outermost part of the rotor as about half as high as in the gleiohaasslgaa section, the invention need of course not have any "aoloa-Ba * so adjustment. For example, the windshields could neither be larger or smaller than half their normal height. Furthermore, the centers of the Bofsm, which form the dovetail arcs 76, do not need to be exactly on the pitch circle pm and the arcs J6 need to be very real. If they are not true arcs of a circle, the complementary part 83 in the auxiliary arotor trough and the result are perfect sealing.

In Fig. 31 the angle of inclination of the web 73 is shown as a 45 * th · portrayed in support, while in lie · 33 * tw * 3o ° alt Ba * mf «tf the rotor axis is · Although the aim is an angle of about 45 ° lWgt other angles also result in a successful · ArteLts «·! ··« The auxiliary rotors shown in FIGS. 30, 32 and 34 slad See below the Eauptrotorc shown in Figs. 29, 31 and 33

Since the liquid cooling of botars of this type heia Barn whom Blown is known per se, In the drawing are * »kala · Hai»

"*" 909886/0611

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W-5392

channel · shown. The uneven part of the auxiliary rotor · can j «but for the cooling the Eochteaperaturende can be extended, wean • In · susceptible cooling is required, and there is a main pipe an ample area for running a cold storage room

When the end of the help rotors is regarded as shown in Fig 3o f · -. Seigt, a small convex Fliche is 81 · aa basis of WuIk 60 slohtbar. However, due to the steep angle of the rotor thread, this convex flute does not exist if the rotor is cut at an old angle to the rotor soles, and there is no conical flute in this rotor bowl, as is the case with the rotors according to the USi patent 2,922,377 which is tall. This difference at the base of the auxiliary rotor bowl is likehtlf "since the absence of the conical fly results in a concave fora" the old • inea rotating abwilt organ can be produced with great accuracy, which corresponds to an important characteristic of the charge. If the rotors were not screw-shaped, a very small convex fly aa Q would be present around the HHfsrotoraald · the outermost delivery end, as in Ed. 3® g · »·! If compression is required, the convex · Flieh · disappears completely.

Fig. 39 shows in an aesthetic representation a waste du Main rotor according to the line A-A in Fig. 33 approximately through the lutte d *

909886/0613

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W-5992 TO

Length of the inclined web 73 · Each turn-off arch 76 is smaller here all that in Fig. 29, since the bow allnählioh in his Large from the outermost conveyor end of the rotor to the Sonittpunkt of the inclined, uneven section 55 with the rolled equal section 54 decreases (Fig. 2). In this hall, the rolling arches 76 with the auxiliary rotor troughs can only be at the front Conveying end of the rotors congruent herds. However, each flexing arch 76 sucks a certain part 83 'of the emergency rotor trough (Fig. 40) and it is not necessary that they become congruent, us a perfect diohting, auoh at the extreme end au received. If there is no congruence at the outermost exit end the only disadvantage is that small pockets are created and not all of the fluid material escapes.

Ba the shape and size of the suction opening 60 and the delivery opening 68 do not form part of the invention, these openings become only generally described.

As can be seen from Fig. 2, the suction port 60 is partial in the end wall and partly in the syllndrieohen, Kanerwtadtn dM Housing Io worgeeehen. The limitation of the opening is given by dl « Determines the thread turns of the rotors if they are so that see a Taeehe is essentially unwound to its maximum size has to take into account that the Arbeltsdrehsahl dl Can influence the size of this opening slightly. When dl «open

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W-5992 Ή

If it closes early, the tasks are not completely closed. fills, while when the opening closes su late, part of the Fluid exits through the suction port. The limitation of the delivery or outlet opening is determined by the threads of the Rotors determined when the threads are so that a given Bag has been reduced in size by the amount » which is required to keep the fluid at its best To compress pressure within the unit, i.e. by internal compression. When the required pressure is generated, are located the thread turns in overlap with the edge of the exit opening and further rotation of the rotors causes the fluid to leak.

For operation at extraordinarily high speeds, the Suction opening fully provided in the end wall to take effect to turn off the centrifugal force on the fluid. With such a design, the outline of the opening in the end wall will always be nooh by the location of the ends of the threads, if this « • Have a pocket of maximum size.

The following is a course description of a method of manufacture of the rotors according to the invention in their simplest form given. The main rotor 34 is manufactured using the hobbing process and with the exception of the inclined webs, completely finished and is then similar to the main rotor according to the USA patent specification 2,466 * 77 © ♦

" ⁴¹ " 901886/0813

BATH ORIGINAL

It can be made on a machine of the type shown in U.S. Patent 2,792x763. You are unfortunate Section · of both rotors can also be on a Masohin · der General type mentioned are made · The milling cutters for milling of the uneven sections differ from those in that abovementioned patent, but the manufacturing principle is exactly the same. If necessary, the inclined webs 75 can duroh Machining in a lathe to be formed with a taper « SI · soharfen corners loo (Fig. 42), which at the intersections of the inclined flat surfaces 75 and the rolling sides 78 of the thread arise are removed by the formation of rolling arcs 76. The troughs of the auxiliary rotor are complementary to the main rotor turns and are completely described or shifted by this. The shape of the auxiliary rotor is determined after the determination of the The shape of the main rotor is finally determined. There is no rolling motion between the rotors with the exception of the rolling motion of the auxiliary rotor webs on the webs 74 * ■ feet of the main rotor threads instead, and since all of these webs 70 and 74 are cylindrical, they are easy to manufacture. Si total thread surface d main rotor including the rolling arch 76 can be rolled and the entire hollow surface of the auxiliary rotor can be complementary Telse can be generated.

Referring to Figure 42, there is shown the small amount of metal that must be removed after the inclined land 75 has been finished is to achieve each hobbing arc 76. This metal between

~ ⁴² "90 9 8 86/0613

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The sharpening edge loo and the rounding arc 76 can be done • Ground the Abv & lSTerfahren away «, does a perfectly suitable Course of the arch · 76 sub inclined web 73 and sur Abwtl »- • Old 78 years of age. Saa Abvälaen dea ^ Ofena 76 gives excellent accuracy and facilitates copying.

Flg. 55 and 36 aeigen a rotor pair bit an abrupt one la the fora of the main rotors & hne and the Hllfarotoraulden atatt the at the preventive fora after Pig. Jl - 34 geselgten allaihlionaa Terladerung · The abrupt decrease la the fora can beatiaate for Baratallunga experience «unaohenavert aein, however« earth at elaeor Aolohen Baufora received small sealed bags.

Although the invention was driven by a general veading "la puape, blower", torriohter or overloaded, for reasons of simplicity, aaohen eie the same characteristics, "βίο hey for the mentioned applications, a Motor »Baapfaotor, Cxploaionaaotor, MefiTorriohtung and ttkr Tlele aadere Tarvendunga Falls on a wide variety of areas are very suitable. It is particularly suitable as a measuring device, if ala oha · internal terdiohtung is used, since by the holding of detached Taaohen also all the lazy work done to the rotors is eliminated, eo that the torriohtung is old

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Loss of pressure through them works

While the invention has been described above on the basis of several prior AM guidance forms including certain important details ee- However, the invention is not affected by this but can experience different cushioning within its framework.

• 909886/0113

BATH ORIGINAL

Claims (9)

¥ -5992 »f. 1U Mar »1965 Claims t Displacement device with a housing provided with intersecting cylindrical rotor chambers as well as suction and delivery openings, which are arranged diagonally opposite one another adjacent to the opposite ends of the housing, and two complementary interlocking rotors provided with a screw thread, dl Consist of a main rotor and a locking or auxiliary rotor, each of which has a number of threads and troughs, the rotors are rotatably mounted within the chambers of the housing and interact with each other and with the housing to form pockets at the suction opening, in order to demand these pockets and the fluid in this axial length of the rotors and to bring the fluid to exit at the outlet end of the rotors through the outlet opening when the rotors rotate in opposite directions around their axes, the rotors in a temporal relationship by control train wheels are held and the threads of each rotor with the! formations of the counter rotor and with the housing chamber walls so sueasaen that tight tight running clearances are obtained »well-mentioned pockets effectively seal against leakage when the rotors 909886 / OSta ■ Ground the pockets rotated for longitudinal conveyance, thereby without t, that each rotor has an axially extending similar section and an axially extending normal section Has section, the smooth section siek tos. The suction end of the rotors extends from and between the Xatem of the rotors ends, while the unequal section si * Tom stepping out of the Botoren extends and attaches to the gleiohalseifan Section ends, the length of the inconvenient section is much less than the normal axial dimension of the outlet opening is; the main rotor is characterized by cylindrical webs aa the foot of the thread passages, which are smooth over the length of the rotor ± n tsjsjsst · lent, cylindrical webs at the spits' * · * oevindegängey which are smooth over the length of the same and are inclined Strips that extend over the full length of the uneven section and that are curved in such a way that the KrussMingssdttelpunkte lie on the axis of the rotor, with the inclined struts being the widest at the exit points, the sides The construction rotor winch 4 "sjamf9 Over its full length through the head edges of the auxiliary rotor sjs> and the edges formed at the intersections between the inclined webs and the rolled-off sides of the main rotor threaded legs are rounded and thus coapleawntir uncut-off parts of the auxiliary rotor julde of the help gates are generated cad -46- 809886 / Olia BATH ORIGINAL The help of the rotor is characterized by cylindrical webs the tops of the Osvindeg & nge «« oak webs are covered with head edges and are essentially cohagous over their full length " the sides of the auxiliary rotor threaded gas valve la the same section of the mentioned rotors through the top edges of the construction rotor produced «earth, and inclined webs in the maiden dea nioht glelohnasslgen section, «oak through the complementary ge · inclined bridges on the main rotor scorched "ground" above the strings the Osvlndegftnge in the non-glalohaasslgen section of the auxiliary rotor The rounded edges of the inclined webs and the main rotor are grounded. 2. Torriohtong naoh Claim 1 «by being able to do this without t _t that the auxiliary rotor as each of its head edges is carved a permanently small arc that is tangential to the cylindrical web, but not tangential on the side of the trough» and with a small smaller arc , which is tangential from the first arches auoh sur Salt · dee Oewindegaag ·· lst _a vm a rounded abv. 3. A device according to Anspruoh 2, characterized gekennseiohnet _f daft auxiliary rotor is at any of "his sylindrisehen webs so ansgeeohnittem receive the" ine flat hat "lrd _t Vobel a TsrhUtnisals- badoriLl 909886/0613 sig narrow wear strips adjacent to each rolling biw, Generating edge of the auxiliary rotor is provided, and beia the main rotor each of the cylindrical and inclined webs is cut out to form a shallow groove, as well as a narrow 7 mm wear strip each of the shallow grooves in the main rotor is provided on each side, the grooves in the main rotor and in the auxiliary rotor are filled with a material different from the Itotora material is and is easily worn in contact with the housing when the rotors are in operation. 4. "Displacement device with a housing, which is provided with diagonally opposite suction and discharge openings, which in this adjacent to the opposite Ends of the housing are arranged, the latter also having calibrated intersecting cylindrical bores, two interlocking, screw-threaded rotors, each of which has threads and troughs, and which are inserted into the mentioned cylindrical bores of the housing are rotatably mounted and with each other and with the housing for JJildung YOtt pockets cooperate at the suction end, and these pockets support the rotors axially length and duroh the outlet end of the housing Bring the outlet opening to the outlet, ττβηη the rotors In opposite directions ura their axes are rotated, the threads every 3 Hc tors a tight fit with the maiden -48- 909886/0613 BATH ORIGINAL W-5992 of the counter rotor have the grooves of which the threads mentioned are picked up when the rotors are rotated to convey the bags in their longitudinal direction, characterized in that inclined web surfaces on the rotors at the outlet end of the housing the depth of the troughs of both rotors Reduce at the outlet end essentially to half its depth at the suction end, the length of the webs shown is less than is the normal axial dimension of the outlet opening, the inclined web on one rotor is a substantially convex surface whose radius points lie on the aohee of the rotor, and the inclined land surface of the counter rotor is substantially concave and complementary to said convex surface on the other rotor, the inclined surfaces in the threads on both Go over rotors and complementary thread surfaces at the exit end of the rotors to form the conveyed pockets at their Proceed to seal the exit end of the housing! the pockets adjacent to the mentioned exit opening and without Formation of sealed pockets essentially decrease on ball. 5 * Displacement device with a housing, that with overlapping cylindrical rotor chambers as well Suction and delivery openings are provided which are diagonally opposed to one another adjacent to the opposite ends of the housing are arranged, and two complementary interlocking * the rotors with a screw thread «di · out ·« -Ä9- 80988 6/0613 BATH ORIGINAL so The main rotor and a locking or auxiliary rotor consist τοη each of which has a number of threads and troughs, the rotors are rotatably mounted within the chambers of the housing and cooperate with each other and with the housing to form τοη pockets at the suction opening, around these pockets and the To convey fluid in this axial length of the rotors and to bring the fluid at the outlet end of the rotors through the outlet opening sum when the rotors rotate in opposite directions about their axes, the rotors being held in a temporal relationship by control gears and the The threads of each rotor interact with the troughs of the counter rotor and with the housing chamber walls so that tight, tight running clearances are obtained which effectively seal the pockets against leakage when the rotors are rotated for longitudinal conveyance of the pockets, since each rotor is axially identified extensive equilibrium has an uneven section and an axially extending uneven section, the uniform section extends from the suction end of the rotors and ends at the ends of the rotors, while the uneven section extends from the end of the rotors and ends at the uniform section, the length of the uneven sections are significantly smaller than the normal axial dimension of the outlet opening;
each of the rotors has an equal and an unequal -5- 909886/0613 BATH ORIGINAL W-5992 fif has gen section, the uniform sections voa Suction end of the rotors to a point between the ends of the The rotors extend, while the uneven sections te tom extend the exit end of the rotors to the uniform section; The main rotor is characterized by uniform cylindrical webs over its full length on the PuB of the thread turns and uniform cylindrical webs over the roll even section at the tips of the threads, the sides of the threads are generated over their full length by the head edge of the auxiliary rotor, the tips of the threads are cut out in a substantially tapering uneven section to form inclined webs, which inclined webs begin at the tips of the threads at the transition point between the same and unevenly wet sections and end at the exit end of the rotor, the length of the inclined webs is less than the normal axial dimension of the outlet opening and the height of the threads la substantially reduced by half at the Aastrittsende of the rotor, the sharp edges, which are formed by the intersections between the inclined webs and the sides of the threads en, to form Abwälzbcgen are rounded, which arcs are to the inclined webs and to the sides of the threads are essentially tangential, the inclined webs mentioned aa -51- 909886/0813 BATH ORIGINAL W-5992 si The widest exit end of the rotor to avoid interruption * free sealing lines to form with the auxiliary rotor, if eioh the rotors turn in a time-controlled ratio and the help rotor is characterized by inclined bars on the FuI the troughs in the uniform section of the rotor «complementary to the inclined webs of the main rotor and »u the Abwils- or production areas in the depressions mentioned. 6 · Device according to claim 5 »characterized» IaB die inclined webs of the main rotor in its unglelchmäasigen section through the complementary inclined web · * ■ foot of the Depressions generated in the uneven section of the auxiliary rotors and the rounded edges of the mentioned inclined web through the complementary rolling surfaces in the Hilferotorzmldea be generated. 7 * Hit positive displacement working device old eiaea that with overlapping cylindrical fiotorkeamers as well Suction and delivery openings are located, which are diagonally opposite one another opposite neighboring the opposite laden dee Oehi »- see, and two complementary interlocking » rotors with a screw thread »the rotors from one The main rotor and a locking or auxiliary rotor are made up of each of which has a number of threads and troughs, deep rotors rotatably mounted within the chambers of the housing rn ^ nd " ⁵² ~ 909886/0613 BATH ORIGINAL and with each other and with the housing to form pockets cooperate at the suction opening «around these pockets and there · Promote fluid in these axially along the rotors su and the fluid at the outlet end of the rotors through to bring the exit opening to the exit, if sioh the Rotors rotate in opposite directions around their axes, the rotors being held in a temporal relationship by timing gears and the threads of each rotor with the troughs of the counter rotor and with the housing walls cooperate in such a way that tight, tight running games are obtained "which effectively seal the pockets mentioned against leakage" if the rotors for the longitudinal conveyance of the pockets are rotated «thereby characterized in that each rotor has an axially extending uniform section and an axially extending section Unrelated section has «the gleiohoäasigs section extends from the suction end of the rotors and «wipe ends at the ends of the rotors, while the disparate «section sioh tob exit end of the rotors from eretreokt and aa smooth ohms Section ends, the length of the uncomfortable section much less than the normal axial absession * the outlet is; the main rotor is characterized by cylindrical webs aa FuQ of the threads, soft over the length of the rotor i »essential are glaicfaaäaaig, cylindrical webs at the tip 909886/0613 Threads that soft over the length of the sliding section are smooth, and inclined webs that extend over the roll length of the uneven section and the such arc-shaped 3ind that the centers of curvature on the The axis of the rotor lie »with the inclined webs at the outlet end The widest of the rotor are »the sides of the main rotor threads are generated over their full length by the head edges of the auxiliary rotor and the »wipe at the intersections the inclined webs and the rolled sides of the main rotor threads Edges formed are rounded and ungleioh- ■ äsaigen by complementary rolled parts of the auxiliary rotor trough lsi Section of the auxiliary rotor are generated and the main rotor is characterized in that its threads have inclined webs with rounded edges in the uneven section and the help rotor is characterized in that the sides of his Threads in the same massive section through the head edges the main rotor threads are generated, and the threads in the uneven section by the rounded Edges of the inclined webs of the ^ auptrotors are produced arcuately, furthermore relatively narrow inclined trough parts at the foot of the auxiliary rotor threads in the uneven section are provided, which merge into the arcuate sides of the mentioned thread eye, the length of the unequal 909886/0613 BAD ORSGINAt W-5992 «Γ massive section less than the normal axial dimension of the exit opening, the depth of the troughs is essentially half at the outermost exit end of the auxiliary rotor than in its uniform section and the webs cylindrical and over at the tips of the bilfsrotor cores their roll length is essentially evenly bound. 8. Apparatus according to claim 7 »characterized in that the inclined handle parts of the help rotor la ungl β ic hinäse ig en Ab « Cut through the coaxial inclined webs on the main rotor gates be generated. 9. Jiit displacement device working device with a housing » which is provided with intersecting cylindrical rotor chambers as well as suction and delivery openings, which are diagonally opposite each other opposite adjacent to opposite ends dta Exactly are arranged, and two complementary interlocking, sit a screw-threaded rotors, which consist of a main rotor and a locking or auxiliary rotor, of each of which has a number of threads and troughs, the rotors are rotatably mounted within the chambers of the housing and with each other and with the housing to form pockets cooperate at the suction opening to convey these pockets and the fluid therein axially along the rotors and ~ ⁵⁵ ~ 909886/0613 _BAD OBlGlNAU 1-5992 5t the fluid at the exit end of the rotors through the exit port to escape when the «rotors rotate in opposite directions, including their axes, whereby the rotors are held in a temporal relationship by control gears and the threads of each rotor with the Troughs of the counter rotor and with the housing chamber walls so teamwork »that tight, tight running games are obtained, which · effectively seal said pockets against leakage when the rotors are rotated for longitudinal conveying of the pockets, thereby characterized in that each rotor has an axially extending uniform section and an axially extending one Has uneven section, the uniform section extending tob suction end of the rotors and between the ends the rotors ends while the uneven section extends rom the exit end of the rotors and atm evenly Section ends, the length of the uneven sections is significantly less than the normal axial dimension of the exit opening; the auxiliary rotor has cylindrical webs and concave troughs, which ridges and troughs evenly over the full length of the rotor are, the ridges and troughs head edges at their intersections form, each of these head edges with a relative small arch is cut out leading to the cylindrical Web is tangential, but not tangential to the side of the MuBa, as well as by a second smaller arc, the ~ ⁵⁶ ~ 909886/0611 BATH ORIGINAL W-5992 is tangent to both the first arc and the side of the trough to achieve a rounded rolling edge, and the sides the auxiliary rotor threads through the top edges of the main rotorβ be generated; the main rotor is characterized by its uniform cylindrical shape Webs at the tips and pubes of the threads, the side th of the main rotor threads by constantly changing points on the arches of the rounded generating edges of the auxiliary rotor are generated and a rounding at Pu (J of each thread turn it is provided which roundings are complementary to the rounded edges of the auxiliary rotor threads, the roundings and the rounded edges of the auxiliary rotor become congruent as the rotors rotate about a seamless seal line Form over the full length of the rotors za. lo. Device nach.Anspruch 9i gekannzolehnet that each the cylindrical webs of the auxiliary rotor to form a flao Groove is cut out, with a comparatively sohmaler Wear strips adjacent to each generating or rolling edge of the auxiliary rotor is provided, while each of the cylindrical webs of the main rotor at the top of the uewindegänge to form a flat hat is cut out, also a narrow one 'Wear-out tires adjacent each head edge of the main rotor is provided, the mentioned flat hats in the main rotor and ⁵⁷ ~ 909 886/0613 δ « in the help rotor are filled with a material that is tob botor- ■ aterial veraohieden and can be easily worn down when the rotors are in contact with the rotor »while the rotors are in operation, the wear tires mentioned are slightly shifted away from the outermost edges of the sotore, so can be derived by friction during operation Warne generated easily in the body of the threads. -58- §09886 / 0613 BATH ORIGINAL . & ■ Blank page