US2854700A - Roller equipment - Google Patents

Description

Oct. 7, 1958 H. A. CASPARI ErAL ROLLER EQUIPMENT 4 Sheets-Sheet 1 Filed March 30, 1953 Oct. 7, 1958 H. A. CASPARI EAL 4,

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United States Patent ROLLER EQUIPNIENT Hans Albrecht Caspari, Emmaberg, Bremen-Lesum, Fritz Schnebel, Bremen, and Hermann Hene, Bremen-Blumenthal, Germany, assignors to Spinnbau G. in. b. H., Bremen-Farge, Germany, a German company Application March 30, 1953, Serial No. 345,366 Claims priority, application Germany May 8, 1952 7 Claims. (Cl. 19-65) The invention relates to a roller device and is a further improvement of our co-pending application Ser. No. 339,654 filed March 2, 1953 and now abandoned and directed to a roller mechanism for crushing impurities in card webs.

The problem of equal pressure distribution over the length of the rollers of a roller device was solved according to said co-pending patent application by supporting each working roller by at least one pressureloaded beam preferably of the same strength of material, the supporting beam being in engagement with the working roller through a pressure transmitting member of the same length as the latter.

In order to compensate for unavoidable constructional inaccuracies and theoretically possible sagging of the thrust beam, which might influence the true parallelism of the working rolls during operation, it is proposed to provide hydraulically controllable means for acting through shoe means upon the working rolls.

According to a preferred form of the invention, a resilient hollow body is inserted, in a longitudinal direction, between pressure conveying shoe means and a supporting beam of a frame. This resilient body is alterable in shape by means of adjustable inside pressure. Advantageously the shoe means is divided up to separate sections.

The hollow body itself consist of tubing closed at one end and formed from rubber, synthetic rubber, resilient synthetic material or thin-walled yieldable sheet metal, and has with advantage at the closed end pressure controlling devices, the supply arrangement for the pressure medium being at the open end. The pressure control devices can, however, also be provided directly adjacent the supply system.

According to a further form of the invention, an electric heating device may be introduced into the flexible hollow body, in order to obtain in a simple manner a heating of the pressure transmission member, and through this of the working rollers, when the material being operated on requires heat treatment. plurality of fluid pressure controllable members'between a supporting beam and the adjacent shoe means, it is advantageous to connect together the several fluid pressure conveying means of communicating pipes.

It is, however, also possible, for example, to give to the lower pressure transmission member a definite pressure and to close the same, and only to impart the desired working pressure to the upper pressure transmission member, using the lower transmission member as an elastic or resilient pad or cushion.

In order to ensure that the working rollers separate from one another on a reduction or cutting off of the elastic pressure, the bearings of the working rollers may be resiliently connected.

Some ways of carrying out the invention are shown, schematically and by way of example, by the accompanying drawings.

When using a A 2,854,700 Patented Oct. 7, 1958 Figure 1 is a front view of a roller device according to the invention.

Figure 2 is a plan view of a pressure transmission member divided throughout its length.

Figure 3 is a section on the line III-III, Figure 2.

Figure 4 shows a front view of a different form of A roller device.

sure medium to the pressure transmission member.

Figure 10 is a further possible way of supplying the pressure medium according to Figure 9.

Figure 11 shows the bearing arrangement of the working rollers according to the invention.

Like references indicate the same parts in the figures.

Similar to the arrangement of our co-pending patent application Ser. No. 339,654 and now abandoned, the working rolls 1, 2, with their trunnions 3, are rotatably mounted in suitable plain or roller bearings 4, 5, which are adjustably mounted, one above the other, in side members (not shown) of the frame of the roller device, so that they are placed under load. The lower ends of the side members of the frame are flexibly or rigidly connected together by means of a beam 6 of substantially the same strength throughout its length. Between the working roller 2 and the supporting beam 6 is provided the pressure transmission member 7, which, according to the invention, consists of a material whose elastic modulus is smaller than the elastic modulus of the material of the working roller 2 and of the supporting beam 6. Against the working roller 1 presses from above the supporting beam 8 on which the required bearing pressure operates by way of example by means of interconnected cylinders 9, 9. The supporting beam 8 is slidable in the side frame members'(not shown) in a vertical direction. Also, between the beam 8 and the working roller 1 is provided a flexible or expansibl e pressure transmission member 7', formed in the same manner as the already mentioned pressure transmission member 7. Suitable elastic materials are plastic, bronze or'the like, whosemoduli of elasticity must comply with the above mentioned conditions. It is obvious that the elastic formation of the pressure transmission members 7, 7' must be such as to compensate for any structural inaccuracies and theoretically possible sagging of the supporting beams 6, 8. In order further to equalise the distribution of the load elastic pads, such as rubber plates, can also be provided between the sup porting beams 6, 8, and the pressure transmitting members 7, 7, as shown in Figure l by the broken lines 10, 10'.

Equal pressure distribution may also be obtained by mechanical, hydraulic or pneumatic resilient systems, as shown, for example, schematically in Figure 4. Arranged between the supporting beams 6 8, and the respective pressure transmission members 7,7 are, for example,

individualhydraulic cylinders 11, 11, which are connected by communicating conduits l2, 12' with the sup-' ply arrangement, for example a pump 13, for the pressure medium. Between the pressure transmission members 7, 7' and the pressure devices 11, 11' intermediate members 14, 14, in the form of bars or strips may be provided in addition. To obtain as far as possible an individualized pressure action on the pressure transmission members 7, 7 it is advantageous to divide up the pressure transmission members in the longitudinal direction, as at rollers 1, 2 is obtained, if, in the preferred arrangement:

according to Figure, 5, flexible. hollow bodies, for example tubes or pipes. of rubber orthin+walled metal,

which alter in shape according to the. pressure prevailing in, them, areprovided between thesupporting beamsfi, 8 and the pressure transmission members 7, 7'

Withreference to-Figs, 6 and, 8, it may be stated; that while the pressure means is shown in thesefigpres; for, thetop roll .1; only, itis; to beunderstood that the. pressure means is duplicatedfor the, bottom, roll 2. Asshown in Figures 6 to 8, a closed chamber. 16 ,is -provided err-thesupporting-beam 8, which 'chambermay; be'formed either from a single profiled bar 17, (Fig; 6-) orfromtwovprofiled: bars 1 8,1,8f (Figs. 7 and 8;), and in whichisdisplaceable in a vertical direction the pressure; transmissionlmember 7'; Thetransmission member- 7. may be formed either-as a sliding bar (Figure 6 and Figure, 7) or as a rolling body (Figure 8). Inside the. chamber; 16.is theflexible pipe or tubular hollow body 19 which extends. for the full length of the working roller 1 (Figure The hollow body 19"in the form shown. in Figure. 5a is closedat the right-handlendand there is provided with pressure control devices, namely a pressure gauge 20 and a regulating valve 21, by the help of which the filling and pressure of the; pressure medium in the hollow body- 19 may be condesired, the'hollow body 19-may be tempered orheated by means of an electrical heating arrangement 24 (Fig. 5) fitted in the hollow body preferably at-its closed end, in such a manner that a desired temperature is communicated to the pressure transmission member 7'. This arrangement is shown in Figure 5 onthe supporting beam 6.

The arrangements forthesupply of-pressure medium tothe hollow body 19 may alsotake other forms. According to- Figure 9; the pistons 25' of hydraulic cylinders 26; 26' are connected mechanically with screwthreads of opposite hand, so that rotation of the hand-wheel'28 varies the pressure of the pressure media in the upper and lower hollow bodies 19 simultaneously in conformity with the direction in which and to the extent to which the hand wheel 28 is turned.

In the arrangement according to Figure 10, check valves 29, 29 are provided at the open ends of thehollow bodies 19. The hollow bodies 19 areadapted to communicate with the supply pump 31 for thepressuremew dium through the communicating passages 30, The, desired pressurein the hollow bodies19 may, withthis. arrangement, be easily obtained. Among other thingsthe.

check valve 29 may be so adjusted that the respective hollow body 19 will only take a predetermined pressure and will then close, whilst the desired working pressure is communicated to the working rollers through the check valve 29.

In order to make certain that the working rollers 1, 2 follow up a desired pressure reduction in the pressure transmitting members 7, 7', the bearings 32, 32' of the working rollers are innerconnected by a spring 33 (Fig. 11). If the pressure in the pressure transmission members7, 7' alters, the spring 33 ensures that the working rollers are separated from one another by the required distance.

Flexible pressure transmitting members of the kind described give a sensitive adjustment in such a manner that the load is spread evenly over the entire length of' the;working rollersand any deviations from the parallel positions of the working rollers, due to the load or other circumstances, are compensated for. This has'the result that the supporting beams 6, 8 may be of a lighter construction, because theoretically large deflections are permissible and also large manufacturing tolerances may be allowed. In this case onemay connect both supporting beams 6, 8, either movably with the frame Walls of the roller device, or rigidly thereto so so that a vertical slideguide for the upper supporting beam is no longer necessary.

We claim:

1. In a web squeezer for crushing impurities in card webs comprising: a pair of rotatable work rolls mounted in parallelrelationship formovement toward each other for squeezing a card web between them and means for urging saidrolls toward each other, said urging means comprising shoe means-extending axially along each of said rolls on the sides outwardly from the mutually contiguous sides thereof andadapted to bear thereagainst, a beam outwardly from and generally parallel to. each/shoe means, housing means, respectively fixed to each. ofsaid beams and including: guiding means gslidably guiding said shoe means, said housing means respectively confining with the respective adjacent shoe means a longitudinal chamber with three fixed longitudinalsides and .one movablelongitudinal sideformed by. thev adjacent shoe means, and a flexible hollow memberv mountedin said longitudinal,chamber betweeneach beam and. its associated shoe means. and beinglexpansible by-pressure fluidto force said shoemeansaway. from said beam and against its associated roll, the shoe means, the beams, the housing means; and the hollow. members beingsubstantially coextensive with the working length of said rolls'whereby the. forces thereby exertedv on saidrolls are uniformly distributed; along :the. working length thereof.

2. A web squeezer according. to claim 1, which includes electric heating means mounted within said flexible hollow member-and arranged for connection with an electric source.- outside said hollowmember.

3. Aaweb squeezer according to-claim: l, in which said shoe means includes a-roller contacting theadjacent rolli 4. A web squeezer according-to claim 1; in which'the- 5'.- A -web squeezenfor-crushi-ng impurities in card webs,

which comprises: a pair of rotatable work rolls mounted inparallel relationship for movement'- toward each other forsqueezing a card-'web'between them'and means' for urging said rolls-towardeach other, said urging means comprising shoe-means extending axially alongeach'of said rolls onthe sidesoutwardlyfrom the mutually contiguous sides thereof and adapted to bearthereaga'mst, each of saidshoe means comprising a plurality of'aligned. shoe segments, a beam outwardly'from-andgenerally parallel to each shoe means, housing means respectively fixed 'toeach of said'beams and-including guiding means slidably guidingsaid shoe'means, said'housing means respectively confining with the respective. adjacent shoe means a longitudinal chamber-with three fixed'longitudinal sidesand one movablelongitudinal side formed by v the adjacent shoe means, and a flexible hollow member mounted in said longitudinal'chamber between each beam andits associated'shoe means and being expansible by pressure fluid to. force. said shoe meansaway from said beam and against its associated roll, the. shoe-means,

thev beams, the housing means andthe-hollow membersbeing substantially coextensivewith the working -length-of'- mounted in parallel relationship formovement toward each other for squeezing a card web between'themand means for urging said rolls toward each other, said urging means comprising shoe means extending axially along each of said rolls on the sides outwardly from the mutually contiguous sides thereof and adapted to bear thereagainst, a beam outwardly from and generally parallel to each shoe means, fluid expansible means mounted between each beam and its associated shoe means for forcing said shoe means away from said beam and against its associated roll, the shoe means, the beams, and said fluid expansible means extending substantially over the entire working length of said rolls whereby the forces thereby exerted on said rolls are uniformly distributed along the working length thereof.

7. A web squeezer according to claim 6, which includes a pressure fluid source common to said fluid expansible means, and conduit means arranged for connecting said pressure fluid source with each of said fluid expansible means.

References Cited in the file of this patent UNITED STATES PATENTS FOREIGN PATENTS v Great Britain Aug. 27, 1931

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