US2815006A - Machine such as a motor or pump for service with gaseous or fluid media, and in particular a compressed air motor - Google Patents

Description

Dec. 3, 1957 T. HAHN 2,815,006

MACHINE sUcH As A MoToR oR PUMP PDR SERVICE WITH GAsEous 0R FLUID MEDIA, AND IN PARTICULAR A coMPREssED AIR MDTDR Filed Nov. 2, 1954 2 myn/rop:

n'fopm HAH/f MACHINE SUCH AS A MOTOR OR PUlVIP FOR SERVICE WITH GASEOUS OR FLUID MEDIA, AND 1N PARTICULAR A COMPRESSED AIR MOTOR 'The present invention relates to machines such as motors or pumps which are driven by, compress or deliver gaseous or fluid media, and is particularly advantageous With regard to compressed air motors.

The invention has for its object the provision of a machine for use particularly as a compressed air motor, which, while being of very simple construction, is resistant against wear and the operation of which is not aifected by impurities in the driving medium. Contrary to known machines there is no difficulty in obtaining a tight seal. This results in great resistance to wear which is an extremely important factor, particularly in the case of compressed ar motors which are used in underground workings.`

vAn embodiment of the invention is illustrated by Way of example in the accompanying drawing, in which:

Fig. 1 is a section taken on line 1-1 of Fig. 3 through a machine particularly suitable for use as a compressed air motor;

Fig. 2 is a section taken on line 2-2 of Fig. 3 through the same machine with the parts in different positions; and

Fig. 3 is a section taken on line 3-3 of Fig. 2 through a carrier element.

A carrier element 11 is rotatably mounted in a housing 10. The carrier element consists of a hollow cylinder carrying in its central longitudinal bore a rotary control member 12 and is enclosed in a casing 13 of yieldable, preferably rubber elastic material, as, for example, synthetic material, which is `divided into three uniform sections by ribs 14 extending parallel to the longitudinal axis. The ribs 14 have thickened front portions which are received in undercut portions or reception grooves in the carrier element. Feed passages 15 and exhaust passages 16 are coordinated to each of the cells located one between leach two ribs 14 and cooperate with control ports 17 and 18 in the control member 12. The feed ports 17 lead to a longitudinal bore 19 in the control member which bore, when the machine is used as a compressed air motor, is connected to the compressed air main, while the exhaust ports 18 communicate with the atmosphere through a longitudinal bore 20. Rollers 21 Iand 22 form supporting surfaces and are freely rotatably mounted in the housing on opposite sides of the carrier element 11. The rollers may be provided with yieldable casing surfaces. Furthermore, the housing 10 also accommodates a pair of rollers 23 coordinated to the supporting rollers 21 and 22, each pair carrying an endless band 24.

The casing 13 is secured on the carrier element 11 at the sides by flange-like edge parts 25 which engage behind the undercut portions of the carrier element 11 and are held by end disks 26 iixed in position by the aid of screws 27. The carrier element 11 carries a pinion 29 keyed on a trunnion 28, which pinion transfers the output produced by the motor. When the machine is used as a pump, the pinion takes up the driving energy. J ourpals 30 serve for mounting the carrier element 11 in the housing. However, it would likewise be possible to mount the carrier element directly on the control member 12.

For the purpose of explaining the operationof the machine it is assumed that it is to work as a compressed p air motor. When the carrier element is in the position illustrated in Fig. 1 relative to the supporting rollers 21 and 22, a rib 14 forming a boundary wall of :a cell has just passed the supporting roller 22 in the direction of rotation indicated by the arrow. Compressed air is now fed to the cell through .the conduit 19, 17 of the control p member 12 and the ports 15 in the carrier element. This v Patented Dec. 3, 1957 inflates the portion of the cell between the rib 14 and the supporting roller 22 and produces a circumferential force f driving in the direction of rotation. This drive remains effective until the ports 15 in the carrier element 11 have run over the control passages 17 of the supporting member so that the air feed is shut off (Fig. 2). The exhaust conduit 16, 18, 20 now opens either directly or after the imprisoned air has expanded more or less, so that the expanded air enclosed in the cell ows off into the atmosphere. At the same time the same cycle of operations t has commenced on the supporting roller 21 so that the carrier element 11 is driven more or less uniformly. The

endless band 24 guided over the rollers 23 limits thev amount of expansion of the cell connected up with the pressure medium supply so that a good degree of eiciency is imparted to the machine.

As already mentioned the form yof construction illustrated is only one possible way in which the invention can be put into effect and the invention is not restricted thereto. `On the contrary many other forms of construction and applications are possible. If the machine is to be used as a pump the medium to be delivered or compressed must be introduced at an initial pressure sutlicient to innate the cells. As the carrier element moves relatively to the control member the admission is closed and on the other hand the exhaust is opened. The capacity of the cell is reduced by the movement relative to the support-4 ing surface 21 `or 22. Consequently the imprisoned medium is displaced and delivered or brought to a high pressure.

If the machine is employed as a motor the direction` of rotation can be reversed by adjusting the control member 12 relatively to the position of the supporting surfaces 21, 22. There are various ways of utilizing the expansion of any kindred gaseous driving medium if the control element between the opposite ends of the longitudinal bores 19, 20 is divided and separately adjusta'ble. The constructional details of the machine can be modified in many Ways. Instead of a one-piece casing the yieldable parts of the walls of the cells can also be made of sep extending transversely to the peripheral direction by hold'` ing or stretchingmeans.

From the above detailed description of the` invention,`

it is believed that the construction will at once be `ap` t parent, and while there is herein shown and described a preferred embodiment of the invention, it is nevertheless to be understood that minor changes may be made therein without departing from the spirit and scope of the invention as claimed.

I claim: y 1. A device of the character described comprising, in

combination, a support;Y a rotor having a peripheral $1351.

asinooe 3. faceand being `rotatably mounted on said support; a lirst pluralityof consecutive deformablerwall means-v on said' peripheral surface and forming therewith ia first plurality of consecutive Huid-tight chambers; a iirst plurality. of tluid inlet-and outlet=means 'communicatingwith each'of saidchambers;A respectively; a second plurality of abutment means on said support and being arrangedin' the regionfof :said peripheral-wall and said deformable w'all means thereon; and a secondpluralityof operating means,

eachV being operatively' assoeiatedwith "eachof said `"uid" sad'one abutment means "as to causeforce-transmitting..

engagement' between'said".rotorand said-one abutment means` in aI direction corresponding to rotational movement of "said rotor;

2; A- device of thecharacter described-comprising, in combination, a support; -a'substantially cylindrical rotor having'an outerperipheral surface and being rotatably mounted on saidssupp-ort; a-rst plurality of consecutive deformable wall' means on said peripheral surface andforming therewith a tirst plurality of consecutive fiuidtight chambers; a rst plurality of iiuid inlet and outlet means communicating withy each of said chambers, respec-V tively; `alsecond plurality of abutment means on said support and being arranged -in the region of said-peripheral wall and said deformable'wall means thereon; and a second plurality of operating means, `each being operatively associated with eachof saidiluidinlet andoutletrneans and 'with one of'said abutment means in such -a manner that when each'deformable wall means moves past said one .abutment means, fluid ingress int-o and uid egress from the chamber partly formed by such deformable wall means occurs so as to deform the same and to move it into such abutting,relationshipwithsaid-one abutment means as to cause forceftransmitting,'engagement between said rotor andesaid one abutmentmeans ina direction corresponding to rotational ymovement-'of said rotor.

3L, device of the characterdescribed comprising, in combination, a support; la substantially cylindrical hollow rotor having an inner peripheral surface and being rotatablymounted-onsaid support; a rst plurality of consecutive deformable wallmeans-on said peripheral surface and-formingtherewitha-first plurality of consecutive fluid-tight chambers; ia-rstwpluralit-y Aofy ll-uid inlet and outlet means communicating With each of said chambers, respectively; a second plurality of abutment means on said support and being arranged in the region of said peripheral wall and saiddeformable wallmeans thereon; and a secondiplurality of operating means, each being operatively associated with yeachl of said fluid inlet' and outlet-means `andzwithone kof said abutment means in-such a--manner that` when each deformable wall means-moves past said-v onef-abutment means, uid ingress'into and uidegress from the chamber partly` formed by such deformable wall means occurs -so as to deform the same and to move it into such abutting relationship with said one abutment means as to cause force-transmitting engagement between saidrotor `and said one abutment means in a direction corresponding to rotational movement of sa'id rotor.

4. A device of the character described comprising, in combination, a support; a rotor having a peripheral surface and being rotatably mountedon said support; a first plurality of consecutive deformablewall means'on said peripheral surface and forming'therewith a first plurality of 'inatableand 'deflatable consecutive duid-'tight charnbers; a irst plurality of fluid inlet and outlet means vcommunicating with each of said chambers, respectively; a secondiplurality of abutment' `meanslon said support land being arranged theregion ofI 'said peripheral walll and' said deformable wall means thereon, each of said abutment'means including a pair of abutment members oneo'f" which is near said peripheral surface and said deformable wall means thereon while the chamber partly formed thereby is deilated and the other of which is radially spaced from s-aid peripheral surface; and a second pluralityof operating means, each being operatively associated with each of said fluid inlet and outlet means and with'o'ne of saidv abutment means in such a manner that w-hen each deformable wall means moves past said-`one abutment means, duid ingress into and fluid egress from the chamber partly formed by such deformable wall means occurs vso as to inate the chamber and to move 'suchl deformable wall means int-o such :abutting relationship with-.- saidabutrnent members of said one abutment means as to cause force-transmitting engagement between said rotor and said one abutment member of said one abutment means in a direction correspondingvto rotational move'- ment of said rotor. K

5. A device as defined in claim 44 wherein said othermember of each of said abutment means includesa pair of roller members and an endless band carried-thereby, said roller members being so arranged that-a portion-of saidbandis coextensive with a portion of said peripheralsurface of said rotor and said deformable wallmeansthereon and is spaced therefrom while said chambers are deflated, said'portion of said band being adaptedto; be engaged by said deformable wall means when-the chamber partly constituted thereby is inflated, thereby.v limiting the radial expansion thereof.

6. A device as delined in claim l wherein said cle-- formable wall means are constituted by a sheet of deformable materialencompassing said rotor, said sheet:V being uid-tightly connected to said peripheral surface of said rotor along a iirst plurality of longitudinal por.- tions so as to form said tirst plurality of consecutive-fluid tight chambers.

7. A device Vas dened in claim 6 wherein-said rotor is formed with a first plurality of longitudinal recessesand wherein said rst plurality of longitudinal portions of said sheet are respectively constituted by a=iirst plurality of longitudinal ribs respectively arranged'within said longitudinal recesses.

8. In a machine such as motor or pump. for service with gaseous or huid-media, in which a pressure chamber is partly closed by-a movable-wall whichcan be pressedby means of a supporting surface against asolid wall,. in particular a--compressed air motor, spaced supporting. surfaces, a-carrierelement rotatable relatively to and? between saidsupporting; surfaces, cells vdistributed around-f the periphery ofthecarrier element-and being formed. by the wall of the carrier element on the one hand-and?- by` a casing of-yieldable material surrounding-the carrier element on the other hand, said casing beingiirmly con-f` nected tothe carrier element-by.v ribs` extending trans-l versely to the-circumferential direction and being dis" tributed around the,Y periphery at distances apart,v said? casing-constituting movable wall parts partly closing said cells, an inlet port and an outlet port in each of the cells',

being formed by the wall ofk the carrier element on theone hand-l and by a casing of yieldable material surroundf ing the carrier elem-ent onthe other hand, said casing being firmly connected to the carrier element by ribs. extending `transversely to the circumferential direction and 6 engaging behind said undercut portions of grooves in said 2,135,520 Lyon Nov. 8, 1938 carrier element, said casing constituting movable wall 2,596,000 Weiss May 6, 1952 parts partly closing said cells, an inlet port and an outlet port in each of the cells, and a controlling device for FOREIGN PATENTS the inlet and outlet ports, yrotatable relatively to the car- 5 10,139 Great Britain 1844 rief element 5,143 Great Britain 1902 References Cited in the le of this patent UNITED STATES PATENTS 813,443 Mikorey Feb. 27, 1906 10

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