US1320736A - chapman - Google Patents

Description

IVI. T. CHAPMAN.

DEEP WELL CENTPIEUGAL TURBINE PUMP.

APPLICATION FILED FEB. l, 1919.

1,320,736., Patented Nov. 4, 1919.

2 s'HEETs-sHEET 1.

yl//l/l///////// Wl. T. CHAPMAN.

DEEP WELL CENTRIFUGAL TURBINE PUMP.

APPLICATION FILED FEB.1,1919.

1,320,736. Patented Nov. 4, 1919.

2 SHEETS-SHEET 2.

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MATTHEW T. CHAPMAN, OF AURORA, ILLINOIS, ASSIGNOR TO THE AMERICAN WELL` WORKS, OF AURORA, ILLINOIS,` A CORPORATION OF ILLINOIS.

DEEP-WEL`L CENTRIFUGAL TURBINE-PUIVU?.

Specification of Letters Patent.

Original application iled January 8, 1918, Serial. No. 210,583. Divided and this application filed February 1,

T 0 all lwhom t may concern.'

Be it known that I', MATTHEW T. CHAP- MAN, a citizen of the United States, and a resident of Aurora, in the county of Kane and State of Illinois, have invented certain new and useful Improvements in Deep-Tell Centrifugal l'Iurbine-Iumps, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to that type of deep-well pumps wherein are employed suitably-incased centrifugal water-raising elements that are intended to be normally located below the level of the water in the Well. In pumping apparatus of this character it is deemed'of advantage to provide a plurality of discharge pipes connected at their lower ends with the. easing that incloses the centrifugal pump members, through which pipes the water is forced to and through a single outlet member at the surface. In the ordinary practice of installing apparatus of this general type it has been customary to send from the factory the various pipe sections, and the parts designed to unite them, in a wholly unassembled condition,-the work of properly assembling and coupling them together being done at the well. Inasmuch as the labor available for such work is frequently unskilled and inexperienced in such matters it often follows that the assembling is so ypoorly done as to render the apparatus as a whole unsatisfactory. When it is borne in mind that the rotary shaft for driving the pumps must be fixed and at all times maintained in an absolutely vertical position and that the lateral support relied upon to maintain such shaft in its vertical position is derived from the discharge pipes, it will be very plain that the iproper placing and securing together of the various secti ons that constitute each of the discharge pipes is exceedingly important. It is one of the objects of my iinvention to provide improved means for connecting together in parallel relation a plurality of discharge-pipe sections to form units that can be transported to the place of use, such units being adapted to be secured together end to end. and the connecting devices that hold together the `pipes of each unit being so arranged and constructed that they properly receive and holdA the sec- Serial No. 274,526.

tional casing in which rotates the pumpshaft and through which, also, lubricant is fed to various bearings, and thus insure the said shaft and its inclosing casing being readily and comparatively easily placed in the required vertical position by unskilled labor at the well, and insuring also the maintaining of such shaft and its casing during the operation of the pumping mechanism. By uniting the end portions of each set of |pipes, and machining the ends of each discharge unit true and parallel, and also machining said openings through the pipeuniting members, I am able toship in assembled condition the various units that, when .placed end to end, form the main portion of the discharge pipe system of a well and also form the lateral supporting means from which the pump-shaft and its casing are held vertical-which units are capable of being installed in a well properly and with comparative ease and rapidity, even by unskilled labo-r.

Further objects of the invention are to provide novel means for lubricating the lower bearing of the pump-shaft; to provide an effective water-seal above the pumps and within the casing that is located directly above the`pumps, so as to prevent the pumps from drawing 1n air or losing their,

priming when the level of the water in the well falls below the pumps; to provide iinproved means for properly suspending the .shaft and the runners attached thereto and also the inclosing casing that surrounds said shaft and supplies lubricant to the several bearings for the shaft; and to improve generally7 the construction and operation of pumping apparatus of this type,-all as illustrated in the drawings and more particularly described hereinafter. That which I lbelieve to be new will be pointed out in the claims.

In the dra-wings:

Figures 1 and 2 are views partly in elevation and partly in vertical section of the upper and lower portions, respectively, of my improved apparatus, the pump-shaft and piping that connects,y the discharge-head at the upper end with the casing,` at the lower end with which the pumps communicate being broken away;

Fig. 3 is a central vertical section on the Patented Nov. 4, 1919 .'4

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line 3 3 of Fig. 1 through the dischargehead of the apparatus and parts connected therewith;

Fig. 4 is a horizontal section on the line 4-4 of Fig. 3, looking upward;

Fig. 5 is a detail, being a vertical section through one of the couplings for the shaft casing; y p

Fig. 6 is a plan View of the coupling shown in Fig. 5;

Fig. 7 is a side elevation, partlyI broken away, of the pump discharge casing; y

Fig. 8 is a vertical section taken at line 8-8 of Fig. 7 5

Fig. 9 is a horizontal section at line 9-9 of Fig. 7;

Fig. 10 is a section at line 10e10' of Fig. 1, and showing a top view of the platev at the upperend of each discharge-pipe unit, into which plate the pipe members are sey cured, and the central opening in which plate forms al portion of the bearing in whichv one of the shaft-casing couplings fits;

Fig. 11 is a top or plan view of the flanges that are connected,. respectively, to the lower ends of the pipes of each discharge-pipe unit, showing also the connecting plate that is bolted to said flanges, the

said pipes being shown in section,-the-view being in effect a'cross-section taken at line 1111 of Fig. 1, but with the shaft and its casing om1tted;

Figs. 12 and 13 are plan and edge views, respectively, of the connecting plate shown in Fig. 11; and

Figs. 14 and 15 are views corresponding to Figs. 10 and 11, respectively, but with the "parts shaped to adapt them for use with a three-pipe unit.

Referring'y to the several figures of the drawings,-

20 indicates water discharge pipes, each made up of a series of sections, and each line of pipe sections extending from the discharge-head at the top of the well to the casing that is located down in the well below the surface of the water being pumped, such pipes being connected to said discharge-head and casing as hereinafter de scribed. The pipes are spaced a distance apart and held by means of connecting devices at the upper and lower ends of the sections. Each two sections of pipe are .connected together by means of a single plate 21 having openings therethrough near its opposite ends into which the said upper ends of the pipe sections are screwed. Upon the lower ends of each two pipe sections are screwed flanges 22. As best shown in Fig. 11, each of these two flanges is,provided with a lateral wing 23, and when the flanges are screwed upon the pipe sections theyy are to be so turned that the two wings `23 carried by the flanges, respectively, will be directed toward each other. At this flanged end, the pipe sections are rigidly connected together by a plate 24 resting upon the flanges 22 and wings 23 and bolted to said flanges. With two pipe sections thus connected together at their upper and lower ends, it is evident that the structure thus formed is a very rigid one as no independent movement of any of its parts is possible. In this rigid united condition the structure is then subjected to machining operations at its end portions so as to make the end surfaces perfectly true and parallel with each other and the connecting devices comprising the single connecting plate 21. The winged flanges 22 and plate 24 are subjected to such further machining operations as will insure a central passage therethrough and a sliding fit therein of a pump-shaft casing so that such casing shall whenpassed through such openings extend vertically and in parallelism with the said pipe sections. r1`he central alined openings for the passage of this shaft casing are of larger diameter than the shaft casing proper, whereby the enlarged central cylindrical portions of the couplings that unite the sections of the shaft casing shall accurately and slidingly fit therein. After being machined inthe manner briefly referred to, each pair of pipe sections and the parts that rigidly Vconnect their ends together areuready for shipment to the place of use, and when used in the construction of a pumping apparatus will be bolted to other similarly formed structures without having any of its parts disconnected or changed from the condition in which it left the place of manufacture. These various pump units are very readily and comparatively easily connected together as there is no screwing together of the various pipe sections, but all that is required to be done is to bolt the various units together. 1n so uniting them, they will be placed so that the under surfaces of the flanges 22 of one unit bear against the uppersurface of the single plate 21 of another unit and then the connecting bolts 25 are inserted through said flanges and plate, as therein indicated, and then the nuts on the bolts are to be tightened. 1n view of the machining of these abutting surfaces in the manner described, itis evifit one against the other so that the pipes 20 as a whole will extend from the top tothe bottom of the well in almost perfect` paral# lelism, and consequently insure perfectly alined openings through the pipe connecting means, which insures also that the shaft and its inclosing casing will be inserted and maintained in place in parallelism with the discharge pipes. The pump-shaft is indicated by 26;` as is usual it is made up of sections secured together by couplings 27. 28 indicates the before mentioned inclosing casing. for 'the shaft .26, which is also made up, of course, in sections. These casing sections are connected together by a coupling 29, an enlarged view of which is shown in Fig. 5, from which it is seen that it comprises two screw-threaded end portions upon which the ends of the adjoining casing sections 28 are screwed and a cylindrical portion intermediate of the screw-threaded end portions, which intermediate portion is of materially larger diameter than the end portions. The casing sections are to be of such a length as to insure the enlarged cylindrical central portion of each coupling to lie within the opening formed through the abutting end connecting members of two of the said units, and as the central portion of the coupling has been machined to have a sliding tit within such opening, it is evi dent that the bearing thus formed between the parts insures the proper vertical position of the casing and its contained shaft. As shown in said Fig. 5, the upper and lower faces of the enlarged central portion of the coupling are each formed with an annular recess 30, the outer wall of which is inclined toward the axis of the coupling. The ends of the shaft casing screwed on to the coupling ends are to be so beveled as to approximately fit in such recesses 30, and thus making a more perfect union between said sections and the coupling. Each coupling is centrally and accurately bored to properly receive the pump-shaft 26 and form an extended bearing therefor. The shaft casing 28 also acts to conduct a suitable liquid lubricant from the top of the well to the various shaft bearings, and each bearing is, therefore, provided with one or more passages 31 therethrough for permitting such lubricant to pass down through the entire length of the casing. 32 indicates a pumpdischarge casing having in its upper end suitable openings with which the lower ends of the pipes 20 of the lowermost unit communicates, such lowermost unit being con nected toa flange 21b of such casing by bolts passing through it and through the flanges 22 of such unit, as clearly shown in Fig. 2. 33 indicates a shaft bearing extending centrally of the casing 32 and preferably formed integral with radial supporting wings 34 that extend to the cylindrical wall of the casing. This bearing member 33 is lined with a brass sleeve 35 for forming the bearing proper at that point for the pumpshaft. To the shaft are to be secured any desired number of pump runners. ln the I construction illustrated, two runners are shown, indicated, respectively, by 36-37, the upper one 36 being located in the lower end of the casing and the other one being in a separate case 38 removably secured to the lower end of said casing 32. Between the abutting flanges of the parts 32 .and 38 are inserted packing rings indicated by 39.

'When the apparatus is first installed, I pre'- fer to place a plurality of such packing rings at the joint, and fromtime to time some of such packing will be removed for the purpose of taking up the wear between the pump runners and that face of the casing against which the runner rotates. There may be any number of such cases 38, depend'- ing upon the number of runners employed, and the various cases will be secured together in the same manner that the casing 38 is shown as secured to the casing 32-that is by bolts extending through flanges on the respective parts with rubber packing rings interposed between them. To the lower end of the runner casing 38, shown in the drawings, is attached in a similar manner a cylindrical casing 40 open at its upper end so as to be in free communication with the lower runner casing 38, and having suitably attached to it at its lower end a suction pipe 41, through which water from the well is from the interior of which extends a passage communicating with the shaft bearing that is held centrally in the said casing 40. ln the ychamber of this lateral extension 44 and in the said communicating passage that leads therefrom is placed a quantity of solid lubricant which is adapted to be fed forward so as to keep the bearing for the lower end of the shaft properly lubricated. The outer end of the member 44 is closed by a cap 45 screw-threaded into it, and between the inner end of such cap and the mass of solid lubricant is left a small space which is in communication with a short piece of pipe 46, said pipe also communicating at its upper end with the interior of the lower runner casing 38. The upper end of the short pipe is suitably covered by a filtering material 47, preferably felt. With the pump in op eration, water from the lower runner casting will be forced down through the pipe 46 against a loose plate or head that bears against the outer end of the solid lubricant, and thus' forces such lubricant properly against the lower end of the shaft, and as the upper end of the pipe is protected by the filtering material, no foreign substance of any kind will be allowed to pass down and find its way to the shaft bearing. 48y indicates a cup-shaped cap upon thepumpshaft 26 directly over the bearing 42, said cap being secured to the shaft so as to rotate therewith, but being free to move up and down thereon. lt can be so secured by a key and slot as usual in such connections. Above it and bearing against it is a coiled spring 49 suitably secured to the shaft so as to rotate therewith. This spring pressed cap being always held in close contact with the upper end of the bearing 42 efl'ectually prevents any sand or other foreign matter that is carried by the water being pumped from entering and injuring such bearing.

Above the upper pump runner, the casing 32 is provided with a stuffing-box 50 containing two separate packings that surround the shaft, the lupper one of such p'ackings 'being indicated by 51 and the lower one by 52. The upper end of the sleeve 50 is closed by a gland 53 screwed therein. The two packings are held properly compressed around the shaft by two means, one of which is a coiled spring 54 located around the shaft and bearing at its upper end against the packing 51 and bearing at vits lower end against the packing 52, the packings thus being compressed, respectively, between said spring and the gland and between said spring and the lower end of the sleeve 50.

` The other manner in which such packings are compressed is by means of the pressure of the water being pumped,'said water being ladmitted to a vertical1 pipe 55 closed at its upper end and having openings in its wall surrounded by a screening material 56 as shown, such pipe communicating at its lower end with a passage 57 that communicates with the space in which is located the spring.

54. The outer end of this passage 57 is j closed bya screw .plug 57a. Between the central bearing sleeve members 33 and 50 I provide an integral enlargement, the side walls of. which extend ac'rossthe casing 32, with which walls they are integral. This `construction provides a chamber 58 in which is held water or other lubricating liquid to form a seal aro-und the upper end of the packing box, the gland 53 ofwhich projects into such chamber. At the ends of this chamber-are formed openings 59 through the wall of the 'casing `32, thelower edge of such4 openings lbeing'well above the top of the stuffing-'box gland so that there will always be insureda sufficient quantity of water being retained in the chamber to form Aan effective water seal, and thereby prevent- 50- ing ythe entrance of air around the pump rod that would pass down into the pump and prevent the proper working of the mechanism when the water in the well is lowered unduly. During ythe Iiormal operation of the pump with the casing submerged, a free supply of water from the well-to the cham.- ber is insured by these openings 59. 60 indicates a collar securedb-y a set-screw or otherwise to the shaft 26. It is locatedin the chamber 58 and serves as a baffie to the water that is forced through the pac-king 51 and to a large extent will prevent the aolmission of any water to the shaft bearing4 above the chamber.

61 indicates I-beams secured 1n position at opposite sides of the well mouth, and upon which is suitably secured the plate 21 of the uppermost pipe unit. Against the machined upper face of this connecting plate 21 rests flanges 62 formed on the base of the discharge-head-such flanges being also formed true on their under surfaces to make a perfect fit with the plate 21. The plate 21 and Hanges 62 of the discharge-head are bolted together as shown. The discharge pipes communicate with and discharge into a Y- shaped connection 63 that in turn discharges into a large discharge pipe 64 bolted thereto. The discharge-head also comprises three legs 65, one of which is a short leg that rises from near the upper end of the Y-shaped discharge member 63, and these legs at their upper ends support a platformi 66. The shaft casing 28 at its upper end 1s screwed on to the lo'wer end of a coupling 67, as best shown in Fig. 3, wh'ich coupling passes through the said uppermost plate 21 and projects abo-ve the same, and such projecting portion is screw-threaded as shown, and upon such screw-threaded portion is a collar 68. This collar is .provided with holes 69 in its edge into any one of which a suitable bar can be inserted for turning the collar on thescrew-threaded coupling. By turning this nut as required, the coupling can, of course, be drawn up and draw with it the shaft casing 28,'thus exerting such a tension or pull on the casing sections 28 land their coupling members as to insure the casing as a whole being properly held in a perfectly vertical position. The co-llar 69 is held in its adjusted position by means of a lock-nut 70 screwed down against it. The pumpvshaft is afforded a bearing by this coupling 67 just as in the -case'of the coupling members 29, and, as shown, the upper portion of the shaft projects up through the platform 66, and at its upper end has screw-threaded upon it a coupling or head 71 which is held to the shaft by a key 72. This coupling or head 71 rests upon the upper member 73 of a ball bearing device, the lower member being indicated by 74. Between these members 73 land 74 are interposed a series of anti-friction balls. The ball bearing device is located within a 4cup-shaped receptacle 75, from the lower face of which extends downwardly a bearing sleeve 76 which is lined with suitable bearing material 77, preferably bronze, below which is a packing 7 7a held in place by a gland 78 screwed into the lower end of the.

essary to compensate for wear of the runners. When such adjustment is had, the screwing up of the lower nut, 80, tightly against the under face of the platform 66 will hold the cup-shaped member. 75 that supports the ball bearing devices securely in place, with the weight of the shaft borne by the upper nut 79. The cup-shaped member 75 is .provided with an annularwall 81 that is concentric with the outer wall of such member, and by providing it there is formed an annular space 82 extending all around but separated from the ball bearing members that support the shaft. The inner portion of the cup-shaped member 75, in which the ball bearing supporting members are located, is designed to be kept filled with oil, and as such lubricant and the ball bearings will heat when the pump is in operation, I provide for a constant flow of cold water through the space 82 to counteract such heating tendency, and this I do by providing a supply pipe 83 which extends at its lower end into the Y-shaped discharge member 63 and at its upper end into the annular space 82. rI he lower end o-f this pipe 83 is shaped in any suitable manner to divert into the pipe some of the water passing throughthe discharge member. Such water so diverted will circulate through the annular space 82 and will |be discharged through another pipe 84 that is suitab-ly connected to the cupshaped member near the bottom of said annular space 82 and passes -down into the discharge member 63, and has, as shown in Fig. 3, an end turned in the direction of the Howing stream. By this means the central portion of the cup-shaped member will be kept comparatively cool.

The shaft inclosing casing 28 is also utilized as a medium for conducting a lubricant in liquid form to the various shaft bearings. Such lub-ricant is inserted in the casing through a pipe 85 inserted in an opening through the set nut 70, such pipe being in communication with a suitable lubricant receptacle, not shown. The lubricant upon being admitted `will pass down through one or more passages '86 in the upper bearing 67, and thence down through the passage 31 in the various intermediate bearings 29,

and will finally escape through a similar letter a said figures, the three pipes there shown are indicated by 20a and the single plate that connects such pipes together at one end and that corresponds to the single plate 21 is iiidicated by 21a. The flanges at the other 70 end of the pipe sections, which correspond to the flanges 22 in the construction already described, are indicated by 22a, their laterally extending wings by 23%l and the plate that lies over and is attached to the part-s 22a and 23a is indicated by 24a. The other parts in said figures corresponding to the parts already described are indicated by the same reference numerals with the addition of the I do not herein claim broadly the construction and arrangement of parts comprising a plurality of pipe sections and the plates and flanges carried thereby for securing the several pipe members of a unit together, but only claim in this application such units when combined with the pump-shaft and its inclosing casing, as the construction of such pipe units separately considered forms the subject-matter of a pending application filed by me on the 8th day of January, 1918, Serial No. 210,853, of which application the present application is a division.

The part 71 at the top of the apparatus shown is provided with a plurality of driving pins 87 which is one of the means used by which an electric motor may be connected for driving theY shaft 26. Such electric motor may be mounted on the platform 66 or elsewhere as desired.

From the description of the construction and relative arrangement of parts, it is believed that the operation will be readily understood by those skilled in the art, and the advantages of the construction and arrangement of parts will be fully understood and appreciated. h

What I claim as myinvention and desire to secure 'by Letters Patent, is

1. In a deep-well centrifugal pump, the combination with a Iplurality of water-discharge units each comprising a plurality of pipes spaced a distance apart and connected at one end by a single plate into which they project and at their other end by flanges screwed thereon and rigidly united by a plate, said two end plates having alined' openings therethrough and having their outer facesfparallel, of a sectional pumpshaft and a sectional casing surrounding said shaft, the sections of said casing being connected by couplings that are positioned in and have a sliding fit within the alined openings in said connecting end plates, and pumping means connected to said shaft.

2. In a deep-well centrifugal pump, the combination with a plurality of water-dis charge units each comprising a plurality of pipes spaced a distance apart and'connected at one end by a single plate into which they 13o project and at their other end by anges screwed thereon and rigidly united by a plate, said two end plates having alined openings therethrough and having their outer faces parallel, of a sectional pump-` A in said connecting end plates, and pumping means connected to said shaft.

3. In a deep-well centrifugal pump, the combination with a plurality of water-discharge units each comprising a plurality of pipes spaced a distance apart and connected at one end by a single plate into which they project and at their other end by flanges screwed thereon and rigidly united by a plate, said two end plates having alined openings therethrough and having their outer faces parallel, of a sectional pumpshaft and a sectionalcasing surrounding said shaft, the sections of said casing beiner connected by couplings having externa screw-threads upon which the casing sections are screwed and havin `a machined central portion" located in andaving a slidin fit within the alined openings in said en connecting plates, 'and pumping means connected to said shaft.

4. In a deep-well centrifugal pump, the combination with a plurality of water-discharge units each comprising a plurality of pipes spaced a distance apart and connected at one end by a single plate into which they project and at their other end by, flanges screwed thereon and rigidly united by a plate, said two end plates having alined openings therethrough and having their outer faces parallel, of a sectional ypumpshaft and a sectional casing surrounding said shaft, the sections of said casing being connected by couplings having external screw-threaded end portions upon which the casing sections are Iscrewed and having a' machined intermediate portion of larger diameter than the screw-threaded end portions, said enlarged intermediate portions being located in and having a sliding it within the alined openings in said connecting end plates and having grooves in their upper and lower faces into which the ends o the casing sections project.

5. In a deep-well centrifugal pump, the combination with a plurality of water-discharge units each comprising a plurality of pipes spaced a distance apart and connected at one end by a single plate into which they project and at their other end by {ianges screwed thereon and rigidly united by a plate, said two end plates having alined openings therethrough and hav-rco; their outer faces parallel, of a sectional pumpshaft and a sectional casing surrounding said shaft, the sections of said casing having beveled ends and being connected together by couplings having external screw-threaded end portions upon which the casing sections the casing project when tightly screwed 7 upon the couplings. t

6. The combination with a pump-shaft and an inclosing sectional casing therefor, the ends of the casing sections being internally screw-threaded, of a centrally-bored coupling to receive and form a bearingfor -the shaft, said coupling having externallythreaded. ends upon which the ends of the enlarged intermediate portion in the upper and lower faces yof which are annular grooves to receive the ends of the casing sections when they are tightly screwed upon the coupling.

7. The combination with a pump-shaft and an inclosing sectional casing therefor, the ends of the casing sections being beveled and such end portions being internally screw-threaded, of a centrally-bored coupling to receive and form a bearing for the shaft, said coupling having externallythreaded ends upon which the ends of the casing sections are screwed and having an enlarged intermediateA portion, in the upper and lower faces of which are annular grooves to receive the beveled ends vof the casing sections when they are tightly screwed upon the coupling.

8. In a deep-well centrifugal pump, the combination with a plurality of water-discharge ipes arranged a distance apart and means or connecting said pipes together, of a pump-shaft, runners, connected therewith, a shaft-inclosing casing formed of sections, couplings uniting said sections and forming bearings for the shaft, said couplings having a sliding fit in the means that casing sections are screwed and having an `connect the pipes together and each having a lubricant passage therethrough, a pumpdischarge casing with which the lower ends of the said pipes communicate, a shaft bearing in `said pump-discharge casing also having a lubricant passage therethrough, a stuffing box in said last-named casing, and a chamber intermediate of said stuffing box and last-named bearing into which lubricant passing down the'shaft-casing and the said passages in the bearings enters, said cham- 'ber havingl communication with the well,

whereby a seal is maintained around the lower bearing in said pump-discharge casing.

9. In a deep-Well centrifugal pump, the combination with a ump-shaft, runners secured thereto, and a bearing for the shaft, of a grease-cup, and means for diverting some of the water being pumped to a position in the cup to force said grease into the bear? ing.

10. In a deep-well pump, the combination With a pump-shaft, runners secured thereto, and a bearing for the shaft, of a grease-cup, means for diverting some of the Water being pumped to a position in the cup to force said grease into the bearing, and means for ltering such 'Water before it passes to the Il. In a deep-Well centrifugal pump, the combination with a pump-Shaft, runners secured thereto, and a bearing for the shaft, of a grease-cup, a spring therein for forcing grease in the cup to the bearing, and a,pipe for supplying water under pressure behind the grease inthe cup, said pipe being connected to and having communication With the casing that incloses a portion of the pumping elements.

12. In a deep-Well centrifugal pump, the combination with a pump-shaft, runners se- .cured thereto, and a bearing for the shaft,

of a grease-cup, a pipe for supplying Water under pressure behind the grease in the cup, said pipe being connected to and having communication With the casing that incloses a portion of the pumping elements, and means foriltering the Water that passes to the grease-cup before it passes through said p1 e.

I3. In a deep-Well centrifugal pump, the combination With a pump-shaft, runners connected thereto, and a bearing for the shaft, of a grease-cup, means for forcing grease through the side Wall of the bearing, a cap slidingly but non-rotatably mounted 'on said shaft, and means for holding said cap against the end of the bearing.

14. In a deep-Well centrifugal pump, the combination With a pump-shaft and runners connected thereto, of a bearing for the shaft, a cap slidingly but non-rotatably mounted on said shaft, and means vfor holding said cap against the bearing.

15. In a deep-Well centrifugal pump, the combination of a shaft, runners connected thereto, separate cylindrical casings for the runners, means for connecting such casings together, and packing rings adapted to be removed for taking up Wear when the runners or cylindrical caslngs become Worn.

MATTHEW T. CHAPMAN,

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