US2649052A - Rotary pump or motor - Google Patents

Description

Aug. .18, 1 953 FIM. wEYER 2,649,052` ROTARYPUMP oRMoToR 7 v original med April 17, 1947 7x Z @ill 2` .1 "'34 49 50 .f5 5a Figi. 3f' @a fg? 5 5'? f Patented Aug. 18, 1953 ROTARY PUMP on Moron Ferdinand M. Weyer, Detroit, Mich.,'asslgnor to Marine Products Company, Detroit, Mich., a

corporation of Michigan Original application April 17, 1947, Serial No.

742,168. Divided Vand this application December 26, 1950, Serial No. 202,715

4 Claims. (Cl. 103-117) This invention relates to fluid pressure pumps or motors.

One object of this invention is to provide a fluid pressure pump or motor having a rotor with vanes of resilient material on a rotary shaft mounted in a casing having opposite inner end walls inclined toward one another at angles of slightly less than right angles to the axis of rotation of the rotor shaft, the resilient vanes ilexing as they engage these inclined end walls so as to create a pumping action by forcing liquid outward through an outlet port in the casing and drawing liquid inward through an inlet port in the casing.

Another object is to provide a fluid pressure pump or motor of the foregoing character, wherein the vanes are preferably arranged in approximately V-shaped or herringbone formations on opposite sides of a central disc-shaped rib projecting radially outward from the hub of the rotor.

Another object is to provide a modified fluid pressure pump or motor having a casing and rotor of the foregoing character except that the vanes are substantially straight in that they are substantially perpendicular to the plane of the central disc-shaped rib rather than inclined at` an angle thereto, as in the V-shaped or herringbone formations of the other form of the invention.

This application is a division of my co-pending application Serial No. '142,168 filed April 17, 1947, now Patent No. 2,573,819, for Rotary Pump or Motor.

In the drawings:

Figure 1 is a central vertical longitudinal section through a fluid pressure pump or motor, according to one form of the invention;

Figure 2 is a vertical cross-section taken along the zigzag line 2-2 in Figure 1; Y

Figure 3 is a horizontal section, with the rotor in 'top plan view, taken along the curved-'line 3-3 in Figure 2, showing the flexing of the ro-v tor vanes against the inclined casing end walls;

Figure 4 is a top plan view of a modified rotor with straight vanes removed from the pump or motor; and

Figure 5 is a side elevation of the modied rotor shown in Figure 4.

Referring to the drawings in detail, Figure 1 shows a fluid pressure pump or motor, generally designated IIl, according to one form of the invention and including a base II with a central pedestal I2 having a horizontal bore I3 therein.

Radiating outward from the centralpedestal II2 i 2 which forms a journal bearing for a shaft I4,fis a cup-shaped housing or casing I5. The housing or casing I5 consists of a disc-like radial wall I6 and a cylindrical axial wall I1 having a cylindrical bore I8 therein closed by a disc-like end plate I9 bolted thereto as at 20. The end plate I9 is providedrwith a reduceddiameter portion 2| which extends into the cylindrical chamber I8.

The housing or casing I5 has radially extend-y ing inlet and outlet ports and 3| respectively.

is formed of elastic deformable materiaL-suchi as rubber or synthetic rubber. The vane unit 4I has a central disc-shaped rib 42 projecting outward from thehub 40, and therib 42 carries radially-extendingvanes 43, also of elastic deformable material (Figure 4). l The vanes 4e are preferably arranged in approximately V shaped or herringbone formations on opposite sides of therib 42 and are cut away as at 44, (Figure 1) `where the disc-shaped rib 42 `joins thehub 40.yThe gaps 44 between the vanes `43l and the hub provide flexibility lfor the flexing of the vanes43 parallel to the axis of the pumpas they pass between the inclined end walls of the casing I5, as described below in connection with the operation of the invention. The vanes"4 43 are so inclined relatively to the disc-shaped rib 4I that their ends resemble arrow heads aimed in the direction of rotation of the rotor;

s and also haveannular grooves 46 therein.

Leading into the bore I3 is a v,transversvethreaded hole or Aport 41 (Figure 1) into which is threaded thestem 48 of anoil cup 49. latter is of a conventional pattern, having alid 50 pivoted thereto at 5I so asto permit the insertion of oil or other lubricant for lubricating the shaft I4. The right-hand end of the bore I3 is provided with an annular cavity 52l containingannular packing 53 and compressed, by an annular gland ornut 54 threaded therein as The 3 at 55. Thisbacking 53 prevents the loss of the lubricant along the shaft I4.

Mounted on the outer end of the shaft I4 and secured thereto as by theset screw 56 is the hub 51 of apulley 58 which is provided with a suitable annular groove 59 for engagement by a driving' belt. (not shown). The.v pulley 58 is a conventional type and for purposes of convenience is shown as having a V-groove to acf-` commodate a V-belt. It Will be evident,

however, that any other type of belt'cif` spru'clei Y may be used in order to drive theshat L4.. l

The modified rotor B shoWnri'mFigureal- 5 is generally similar to therotor 31 shown in Figures 1 to 3 inclusive and` has a similar central sleeve 6I on which is mounted the hub 62j the rotor 311i of Figures 1 to `3 inclusive, except that. the rotor. E11 is. capable of rotating in opposite, directionsJwliereas, as previously stated,

of a rotor unit 63 of elastic deformable mate" rial, such as rubber or synthetic rubber. lThe rotor is also provided with a centrali discs.

shaped rib G4 with vanes; 65 arranged in planes which are.` substantially.I perpendicular, to' the, plane-sof the rib 642 instead ot being` inclined at.. anangle, thereto; as: in the; principal ferm of thea invention. The.v vanes, like.A the:v vanes; 43,. are c u-t away sos as: to provide caps. 661' adjacent. the.: hub B2; this construction permitting. :free iiexing of the vanes- 65.; The remainder off therotort 6.0.' is substa-ntiall'y ofthe same construc tion as that of therotor 31, and its operaticn4 isV similar. The; rotor.: 60; however; is: capable o rotating; inopposite directions. whereas therotorN 31? preferably adapted tov rotate 011 directiom only.

The! housing: orV casing I5. contains a chamber` 'I2 bounded by the cylindricah bore I8- andv the'4 opposite; inner end. walls; 1i5 and: 161 of. the endi` platea I9 andi housing or; casing.. wall ISE ref spectively.; The'- end: wall 15: is; inclined, at slightly less; than right. angles to. thel axis: of the rotor shaft I4, whereas. the` end; wall 1:*6; is,- al'so.- inclined at slightly.l less'.- than; rightr angles tor` the a-xis. of the rotor shart; If4f (Figure. 1),.A Because off this construction. the; inner en'dcwalls, i and.l 125? are' sliglrtl'yv closerV together` atv the top of? the-chamber 152V than. at the bottom` thereof, so: that they converge. towards: the ports.: and 3i". 'lheA end walls. 1:5" and.: 16v arerecessed: to.- receive'- the ends of? the hub' portions. 38';A 40.0f: the: rotor'31f.

In. the operation. of. theinventionv asfv a pump,. power isi applied torotate the shaft t4: and con.- sequently the rotor 31- in a coun'terlecky/.isc`r die reaction-K VAfs-tlie vanes e3 pass from the bottomu otr thel casing 'II'.J to the topI thereon, the: corr--l verging of the end'. walls: 15?l and 1.6: causes: the.:v vanes. 4'3 to: flex inward in. an' axial. direction,7 thereby; bringing.;k about a: pumpingA action.- with; respect. to. the. liquid` in thechamber 12 and causing liquid; to be drawn. in through the inlet porirj 30- and forcedv out throughthe exhaust. Dor-tial..

The,T operation of the pump; or motor IIJ as. am'otor is.-y brought about by supplying, pressure fluid tooneof: the ports, this. causingthea rotor 31 to-I rotate,v and impartr rotationvk to the; shaft UIv before. being discharged through the, outlet. port. The vanes 6.3= flexV laterally as. before; as they pass. fromY the bottom of the chamber '12`` tcl-thetop.thereof,.because of the. converging of? the-end,.walls.1.5 and 1.6.

While the intake.. andV discharge ports` 30 andi 3|. have been described as circumferentially, spaced. they are not. necessarily located entirely on the peripheral portion I1, but may ther roten-Sil: ispneferably adapted to rotate in one direction only, but at an efficiency somewhat' higher' that of the rotor 6B. Thus,

fthe.' rational is; preferably used Where there is to vbe vrot'ationi'nA one direction only and the rotor 61'!!A isi used where it is necessary to provide rotation in opposite directions. Of course, Where the. rotor. 60. is rotated in opposite directions.

the intake port for one direction becomes thev pumpr chamber with axiallyespaced end; walls. and a. cylindrical. peripheral Wall joining said;A

end. walls,l said: casing having circumferentially spaced iluid intake and. discharge ports, a-.. shaf-tlrotatably mounted in said casing, atleast (meV of' saidendA walls being inclined relatively to thel axis of said shaft substantially entirelyf across said.; chamber and. causing4 said endI Walls tocon-.v

verge toward said. ports, and. arotor having ay hubportion mountedV on said.y shaft and hav-ing. radially-extending vanes ot elastic' deformable material, the peripheral edges. of, said; rotor' vanesr engagingsaid cylindricall Wall andthe side edges thereof engaging said inclined. end` walls and exing parallel. to the axisof. the pump. inresponse-to theV convergencethereof,

said vanesf at their inner endsl being cut away from-.said hub; portion.

2: Arotary pumpv or motor comprising aholloW casing,` having an` approximately cylindrical pump= chamber: with axially-spat.ed endV Walls-v and: a'. cylindrical peripheral WallA joiningy said' end Walls, said casing having circumferentiallyirl spa-ced iiui'd; intake'. and` discharge ports, a. shaft rotatably mounted in said casing; both of Said end walls; being* inclined relativelyv to the axis' of said shaft substantially entirely across said.

chamber and causing said end! Walls to converge towardV said ports, and' a rotor having a hub portion mounted on said' shaft andi having radially-extending vanes of elastic deformable material," the peripheral edges of said rotor vanes engaging said cylindrical? wall andA the side. edges' thereof engaging said inclined end Walls and" iiexing` parallel to the axis of thepumpj in response to thel convergence thereof, said vanes'A at` theirV innerendsl being cut away from said'hubV portion.

3. A rotary pump or motor comprising a hollow casing having an approximately cylindrical pump chamber with axially-spaced end walls land a cylindrical peripheral Wall joining saidv the axis. ofv said'` shaftV substantially entirely across said chamber and causing said end Walls to converge toward said ports, and a rotor having a hub portion mounted on said shaft and having radially-extending vanes .of elastic deformable material, the peripheral edges of said rotor vanes engaging said cylindrical Wall and the side edges thereof engaging said inclined end walls and flexing parallel to the axis of the pump in response to the convergence thereof, said vanes at their inner ends being cut awa'y from said hub portion, said end Walls having recesses adjacent said shaft, and the opposite ends of said rotor hub portion extending into said recesses.

4. A rotary pump or motor comprising a hollow casing having an approximately cylindrical pump chamber with axially-spaced end Walls and a cylindrical peripheral wall joining said end walls, said casing having circumferentiallyspaced fluid intake and discharge ports, a shaft rotatably mounted in said casing, at least one of said end walls being inclined relatively to the axis of said shaft substantially entirely across said chamber and causing said end Walls to converge toward said ports, and a rotor having a hub portion mounted on said shaft and having radially-extending vanes of elastic deformable material, the peripheral edges of said rotor vanes engaging said cylindrical wall and. the side edges thereof engaging said inclined end walls and flexing parallel to the axis of the pump in response to the convergence thereof, said vanes at their inner ends being cut away from said hub portion, said casing having an end closure member secured thereto, and one of said inclined end Walls being disposed on Said end closure member.

FERDINAND M. WEYER.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,712,157 Merita May 7, 1929 1,989,900 Vickers Feb. 5, 1935 2,152,498 Quiroz Mar. 28, 1939 2,189,356 Briggs Feb. 6, 1940 2,455,194 Rumsey Nov. 30, 1948 2,460,952 Simer et al. Feb. 8, 1949 2,542,240 Fernstrum Feb. 20, 1951 2,542,268 Weyer Feb. 20, 1951 FOREIGN PATENTS Number Country Date 95,139 Germany Dec. 4, 1897

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