US2825287A - Rotary vane-type pump - Google Patents

Rotary vane-type pump Download PDF

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US2825287A
US2825287A US475090A US47509054A US2825287A US 2825287 A US2825287 A US 2825287A US 475090 A US475090 A US 475090A US 47509054 A US47509054 A US 47509054A US 2825287 A US2825287 A US 2825287A
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Prior art keywords
rotor
rotary vane
cam
pump
type pump
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Expired - Lifetime
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US475090A
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Ostwald Fritz
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Continental Teves AG and Co oHG
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Alfred Teves GmbH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
    • F04C2/344—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F04C2/3446—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along more than one line or surface

Definitions

  • the present invention relates to bearings for the rotors of rotary vane-type pumps.
  • Such rotors normally have pivot pins at both sides which are supported by the pump casing.
  • These arrangements are known, as well as the arrangement of a disc-shaped rotor on a driving shaft separately journaled in the pump casing. Both arrangements have the dirficulty of providing, with the accuracy attainable during production, the adequate tolerance in their closely arranged supporting means. Also, production costs are high due to the large number of bearing parts.
  • Fig. l of the drawing shows the pump in cross section and Fig. 2 in top plan view, with belt pulley and one cover plate removed.
  • the pump comprises two cover plates 1 and 2 enclosing therebetween a cam disc 4 fastened by means of nuts 3.
  • a disc-shaped rotor 5 is mounted, said rotor having slots 5a for receiving vanes 6.
  • Packing rings 7 and 8 of rubber serve for sealing the rotor and the cam, respectively, against plates 1 and 2, rings 8 being eccentrically arranged with respect to the axis of rotation of the rotor.
  • the drive means for the rotor comprises a cylindrical structure which passes through a central opening 9 in the cover plate 1.
  • the structure 10 has a central portion which may be provided with wedged grooves keying to the rotor 5.
  • the driving structure 10 preferably has its outer cylindrical surface formed as a belt pulley so that rotary power can be directly applied to the rotor 5 through one or more drive belts.
  • the pump intake 11 and the pump discharge 12 are diagonally connected in a manner known per se with two intake slots 13 and two discharge slots 14, the diagonal connection in the interior of plate 2 being accomplished by ducts or bores 15.
  • the angular path of the stroke on the cylinder is indicated by a between arrows in Fig. 2.
  • the segment-shaped parts of the rotor are provided with chamferings 16.
  • Pocket-shaped recesses 17 are connected to the compressed oil pipe-line of the pump.
  • the belt in such a manner that it will travel in radial direction at right a'n'gles to the "non-bearing areas of said cam. It is desirable to :have --as large a bearing area as possible since the pressure exerted onthe bearing during the driveis the larger, thesn'ialler i's its area, and the high pressures involved result in rapid wear.
  • the size of the a-ranges is in proportion to the number of vanes, since the magnitude of the cam areas is directly proportional to the spacing of the vanes and inversely proportional to the length of the a-ranges.
  • the chamferings 16 are provided to improve the bearing capacity of the slide bearing, since they enhance the formation of hydraulic lubricating wedges.
  • the pocketshaped recesses 17 are provided for the same purpose within the range a of the cam, said recesses being connected with the compressed oil pipe-line or some lubricating pipe system.
  • the rotary vane-type pump according to the present invention has the advantage of dispensing with a centering of the discs 1, 2, and 4, as well as some machining operations, since only the cylindrical part of the rotor and of the cam have to be specially machined. Other parts only need fine mechanical manufacture.
  • the plate 1 can be replaced by another plate which contains a drive shaft with bearing.
  • a rotary pump comprising a pump casing consisting of two cover plates and a cam disc therebetween, said cam disc having a central opening, said central opening defining a first pair of diametrically opposed cylindrical surface portions, and a second pair of diametrically opposed cylindrical surface portions of greater diameter than said first surface portions and concentric therewith, a cylindrical rotor coaxially positioned in said central opening and journalled by and between said first pair of opposed cylindrical portions, driving means secured to said rotor, said driving means being supported solely by said rotor, whereby said first pair of opposed cylindrical surface portions are bearings providing the sole support for said rotor, and means including a plurality of vane members in said rotor movable outwardly to the surface defined by said second pair of surface portions upon rotation of said rotor to force liquid through said pump.
  • a rotary vane-type pump comprising a pump casing consisting of two cover plates and a cam disc therebetween, said cam disc having a central opening, said central opening defining a first pair of diametrically opposed cylindrical surface portions and a second pair of diametrically opposed cylindrical surface portions of greater diameter than said first surface portions and concentric therewith, a cylindrical rotor coaxially positioned in said central opening and journalled by and between said first pair of opposed cylindrical surface portions, driving means secured to said rotor, said driving means being supported solely by said rotor, whereby said first pair of opposed cylindrical surface portions are bearings providing the sole support for said rotor, and means including a plurality of vane members equidistantly spaced about the periphery of said rotor and movable outwardly to the surface defined by said second pair of surface portions upon rotation of said rotor to force liquid through said pump, said vane members defining a plurality of arcuate zones about said rotor, said rotor being chamfered at each

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)

Description

F. OSTWALD ROTARY VANE-TYPE PUMP March 4, 1958 2 Shee'ts-Sheet 1 Filed Dec. 14, 1954 Mi Mi m F. OSTWALD ROTARY VANE-TYPE PUMP March 4, 1958 2 Sheets-Sheet 2 Filed Dec. l4, 1954 INVENTOR. 1 7/2 2 0J1 Wfifl Unit "1 sign or to Alfred Teves, Maschinen-und Armaturcnfabrik Kom. Gee, Frankfurt am Main, Germany Application December 14, 1954, Serial No. 475,090
Claims priority, application Germany December 17, 1953 Claims. (Cl. 103-136) The present invention relates to bearings for the rotors of rotary vane-type pumps. Such rotors normally have pivot pins at both sides which are supported by the pump casing. These arrangements are known, as well as the arrangement of a disc-shaped rotor on a driving shaft separately journaled in the pump casing. Both arrangements have the dirficulty of providing, with the accuracy attainable during production, the adequate tolerance in their closely arranged supporting means. Also, production costs are high due to the large number of bearing parts.
It is the object of the present invention to eliminate the above mentioned drawback.
This is achieved, according to the invention, by providing a disc-shaped rotor for rotary vane-type pumps, said rotor being supported in the cylindrical opening of a cam. The drive can be accomplished, according to the invention, by driving means acting directly on the discshaped rotor.
In the accompanying drawings one embodiment of the invention will be described by way of example, but it should be understood, that this is given only by way of illustration and not of limitation.
Fig. l of the drawing shows the pump in cross section and Fig. 2 in top plan view, with belt pulley and one cover plate removed.
The pump comprises two cover plates 1 and 2 enclosing therebetween a cam disc 4 fastened by means of nuts 3. In the central opening of the cam 4, a disc-shaped rotor 5 is mounted, said rotor having slots 5a for receiving vanes 6. Packing rings 7 and 8 of rubber serve for sealing the rotor and the cam, respectively, against plates 1 and 2, rings 8 being eccentrically arranged with respect to the axis of rotation of the rotor.
The drive means for the rotor comprises a cylindrical structure which passes through a central opening 9 in the cover plate 1. The structure 10 has a central portion which may be provided with wedged grooves keying to the rotor 5. The driving structure 10 preferably has its outer cylindrical surface formed as a belt pulley so that rotary power can be directly applied to the rotor 5 through one or more drive belts.
The pump intake 11 and the pump discharge 12 are diagonally connected in a manner known per se with two intake slots 13 and two discharge slots 14, the diagonal connection in the interior of plate 2 being accomplished by ducts or bores 15. The angular path of the stroke on the cylinder is indicated by a between arrows in Fig. 2. The segment-shaped parts of the rotor are provided with chamferings 16. Pocket-shaped recesses 17 are connected to the compressed oil pipe-line of the pump.
By the eccentric arrangement of the rubber rings 8 with respect to the axis of rotation, an oil film is formed between rotor and rubber packing. In order to take up radial forces of the driving element acting on the cam, the cylindrical part of the latter is made to form a slid States Patent C 2,825,287 I V -P atente'd M "ice hearing which moves-alongfthe cylindrical; range of the cam designated by a. Furthermore, in order to make the radial forces occurring duringthe drive acton; the slide bearing'and not-onthe part of the cam causing the stroke, it is preferable to position the-drivingelement, e. g. the belt, in such a manner that it will travel in radial direction at right a'n'gles to the "non-bearing areas of said cam. It is desirable to :have --as large a bearing area as possible since the pressure exerted onthe bearing during the driveis the larger, thesn'ialler i's its area, and the high pressures involved result in rapid wear. The size of the a-ranges is in proportion to the number of vanes, since the magnitude of the cam areas is directly proportional to the spacing of the vanes and inversely proportional to the length of the a-ranges. The chamferings 16 are provided to improve the bearing capacity of the slide bearing, since they enhance the formation of hydraulic lubricating wedges. Additionally, the pocketshaped recesses 17 are provided for the same purpose within the range a of the cam, said recesses being connected with the compressed oil pipe-line or some lubricating pipe system.
As compared to known devices, the rotary vane-type pump according to the present invention has the advantage of dispensing with a centering of the discs 1, 2, and 4, as well as some machining operations, since only the cylindrical part of the rotor and of the cam have to be specially machined. Other parts only need fine mechanical manufacture.
In case that the pump has to be provided, for reasons of construction, with a drive shaft for receiving a pinion or the like, the plate 1 can be replaced by another plate which contains a drive shaft with bearing.
What I claim is:
1. A rotary pump comprising a pump casing consisting of two cover plates and a cam disc therebetween, said cam disc having a central opening, said central opening defining a first pair of diametrically opposed cylindrical surface portions, and a second pair of diametrically opposed cylindrical surface portions of greater diameter than said first surface portions and concentric therewith, a cylindrical rotor coaxially positioned in said central opening and journalled by and between said first pair of opposed cylindrical portions, driving means secured to said rotor, said driving means being supported solely by said rotor, whereby said first pair of opposed cylindrical surface portions are bearings providing the sole support for said rotor, and means including a plurality of vane members in said rotor movable outwardly to the surface defined by said second pair of surface portions upon rotation of said rotor to force liquid through said pump.
2. A rotary vane-type pump according to claim 1, wherein packing rings are provided between the rotor and said cover plates.
3. A rotary vane-type pump according to claim 2. wherein said packing rings are O-shaped.
4. A rotary vane-type pump according to claim 1. wherein the cylindrical opening of the cam is provided with lubricating pockets, said pockets being connected to a compressed oil pipe-line.
5. A rotary vane-type pump comprising a pump casing consisting of two cover plates and a cam disc therebetween, said cam disc having a central opening, said central opening defining a first pair of diametrically opposed cylindrical surface portions and a second pair of diametrically opposed cylindrical surface portions of greater diameter than said first surface portions and concentric therewith, a cylindrical rotor coaxially positioned in said central opening and journalled by and between said first pair of opposed cylindrical surface portions, driving means secured to said rotor, said driving means being supported solely by said rotor, whereby said first pair of opposed cylindrical surface portions are bearings providing the sole support for said rotor, and means including a plurality of vane members equidistantly spaced about the periphery of said rotor and movable outwardly to the surface defined by said second pair of surface portions upon rotation of said rotor to force liquid through said pump, said vane members defining a plurality of arcuate zones about said rotor, said rotor being chamfered at each end of said arcuate zones.
670,153 Garver Mar. 19, 1901 4 Curtis July 5, Pitman Feb. 17, Shore Aug. 10, Deysher Nov. 6, Bey Mar. 4, Raynor Apr. 14,. Fitts Dec. 14, Wissler Nov. 29, Williams July 30, Vickers Feb. 5, Kendrick Sept. 16,
US475090A 1953-12-17 1954-12-14 Rotary vane-type pump Expired - Lifetime US2825287A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2982219A (en) * 1957-06-10 1961-05-02 Oscar E Rosaen Vane type pumps
US2985110A (en) * 1956-11-19 1961-05-23 Bendix Corp Pump construction
US3059584A (en) * 1960-01-13 1962-10-23 Sonic Eng Corp Rotary pumps and compressors
US3175506A (en) * 1960-10-06 1965-03-30 Erdmann Hans Rotating vane type pump
US3340816A (en) * 1965-10-11 1967-09-12 Weatherhead Co Vane pump or motor
DE2448469A1 (en) * 1974-10-11 1976-04-22 Sartoros Theodore Dipl Ing Infinitely variable double acting pump - has hydraulically actuated stroke control ring with peripheral teeth or slits

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US670153A (en) * 1900-03-29 1901-03-19 Charles Garver Steam-compressor.
US963690A (en) * 1908-11-12 1910-07-05 Frank J Curtis Rotary pump.
US1087181A (en) * 1912-09-04 1914-02-17 Andrew C Pitman Pump or motor.
US1149961A (en) * 1912-11-13 1915-08-10 John Franey Rotary vacuum-machine.
US1245691A (en) * 1917-03-06 1917-11-06 William L Deysher Rotary pump.
US1296356A (en) * 1918-05-04 1919-03-04 George Bey Combined motor and pump.
US1533338A (en) * 1921-05-25 1925-04-14 George J Raynor Fluid-operated rotary driving or driven element
US1610503A (en) * 1926-01-05 1926-12-14 Standard Heating & Refrigerati Gas compressor
US1651336A (en) * 1927-03-29 1927-11-29 Wissler Rotary Wedge Pump Comp Rotary pump
US1722616A (en) * 1926-06-18 1929-07-30 Edward T Williams Compressor
US1989900A (en) * 1931-01-15 1935-02-05 Harry F Vickers Vane type pump
US2255785A (en) * 1940-09-06 1941-09-16 Manly Corp Fluid pressure device

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US670153A (en) * 1900-03-29 1901-03-19 Charles Garver Steam-compressor.
US963690A (en) * 1908-11-12 1910-07-05 Frank J Curtis Rotary pump.
US1087181A (en) * 1912-09-04 1914-02-17 Andrew C Pitman Pump or motor.
US1149961A (en) * 1912-11-13 1915-08-10 John Franey Rotary vacuum-machine.
US1245691A (en) * 1917-03-06 1917-11-06 William L Deysher Rotary pump.
US1296356A (en) * 1918-05-04 1919-03-04 George Bey Combined motor and pump.
US1533338A (en) * 1921-05-25 1925-04-14 George J Raynor Fluid-operated rotary driving or driven element
US1610503A (en) * 1926-01-05 1926-12-14 Standard Heating & Refrigerati Gas compressor
US1722616A (en) * 1926-06-18 1929-07-30 Edward T Williams Compressor
US1651336A (en) * 1927-03-29 1927-11-29 Wissler Rotary Wedge Pump Comp Rotary pump
US1989900A (en) * 1931-01-15 1935-02-05 Harry F Vickers Vane type pump
US2255785A (en) * 1940-09-06 1941-09-16 Manly Corp Fluid pressure device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2985110A (en) * 1956-11-19 1961-05-23 Bendix Corp Pump construction
US2982219A (en) * 1957-06-10 1961-05-02 Oscar E Rosaen Vane type pumps
US3059584A (en) * 1960-01-13 1962-10-23 Sonic Eng Corp Rotary pumps and compressors
US3175506A (en) * 1960-10-06 1965-03-30 Erdmann Hans Rotating vane type pump
US3340816A (en) * 1965-10-11 1967-09-12 Weatherhead Co Vane pump or motor
DE2448469A1 (en) * 1974-10-11 1976-04-22 Sartoros Theodore Dipl Ing Infinitely variable double acting pump - has hydraulically actuated stroke control ring with peripheral teeth or slits

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