US3642388A - Variable-capacity vane pumps - Google Patents

Variable-capacity vane pumps Download PDF

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Publication number
US3642388A
US3642388A US23780A US3642388DA US3642388A US 3642388 A US3642388 A US 3642388A US 23780 A US23780 A US 23780A US 3642388D A US3642388D A US 3642388DA US 3642388 A US3642388 A US 3642388A
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US
United States
Prior art keywords
pump
sealing member
casing
fluid
ring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US23780A
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English (en)
Inventor
Roger Maistrelli
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Automobiles Peugeot SA
Renault SAS
Regie Nationale des Usines Renault
Original Assignee
Automobiles Peugeot SA
Renault SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Automobiles Peugeot SA, Renault SAS filed Critical Automobiles Peugeot SA
Application granted granted Critical
Publication of US3642388A publication Critical patent/US3642388A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/18—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber
    • F04C14/22—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members
    • F04C14/223—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members using a movable cam
    • F04C14/226—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members using a movable cam by pivoting the cam around an eccentric axis
    • 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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
    • F04C15/0023—Axial sealings for working fluid

Definitions

  • the present invention relates in general to vane pumps and has particular reference to a variable-capacity vane pump designed for pumping compressible fluids, especially a pump intended for operating under lowor medium-pressure conditions, i.e., from a few bars to about lOO bars (about 50 to 1,500 p.s.i.) for supplying hydropneumatic circuits of machine tools, public works vehicles and other apparatus and machinery requiring as a rule pumps capable of delivering a given output or amount of fluid under a predetermined pressure.
  • a pump may be driven at a constant speed by means of an electric motor.
  • this solution although practicable and normally used in stationary industrial installations, is obviously ill adapted for installations and machinery using a heat engine.
  • two types of pumps may be used:
  • variable-capacity pump capable of delivering a sufficient fluid output even when the heat engine operates at minimum speed.
  • the cylinder or like capacity of the pump is reduced proportionally in order to keep the fluid output at a substantially constant value
  • a constant-capacity pump designed for delivering the desired fluid output when the heat engine operates at minimum speed.
  • an increasing fraction of the pump output is diverted and returned to the reservoir (or to the suction port of the pump) in order to keep the useful fluid output at a constant value.
  • the member generally employed for keeping the useful pump output at a steady value by diverting the excess output to the reservoir is referred to as the constant output valve.”
  • variable-capacity pump of which the fluid output is adjusted automatically to the desired value irrespective of the speed ofthe driving heat engine or electric motor;
  • variable-capacity pumps are desirable in that they afford a substantial improvement in the circuit efficiency.
  • the output is constantly kept at the value just necessary for ensuring a normal circuit operation.
  • the higher the speed of the pumpdriving motor or engine the greater the output fraction returned to the reservoir. Under these conditions, it is clear that the chiefinconvenience of these known solutions is a considerable amount of wasted energy, attended by the following consequences:
  • variable-capacity pumps should have become extremely popular, but the reason having heretofore prevented the universal use of these pumps is the extremely high degree of precision required in the machining of their component elements and also the leakage which exceeds that of other pump types having a fixed capacity. As a consequence, their pressure is generally restricted to moderate values, to prevent the gain in energy, resulting from the use of a variable-capacity pump, from being compensated by higher internal leakage values.
  • This pump comprising a hollow casing formed with a cylindrical peripheral inner surface and a coaxial rotor rigid with a driving shaft and provided with radially disposed and angularly spaced movable vanes forming pump chambers by riding on the inner cylindrical surface of a ring member adapted to pivot in a transverse plane about a fixedaxis, said ring member having a front face bearing against the pump casing and its other front face pressed by a sealing member crowned by a cover and formed with two external cylindrical surfaces having a circular base which are shiftable both axially and radially, is characterized essentially in that said sealing member coacts with the pump casing and the cover to constitute a fluid chamber communicating via an orifice with the high-pressure side of the pump, the active surface of this chamber corresponding to a value whereat the force resulting from the pressure exerted on said surface is substantially equal to
  • FIG. 1 is a longitudinal axial section ofthe pump
  • FIG. 2 is a cross section taken along the line llll of FIG. I.
  • the pump illustrated in the drawing comprises a casing 1 in which a substantially cylindrical rotor 2 is rotatably mounted about an axis 0, which is the central axis of the casing l.
  • a key 4 locks the rotor 2 to the driving shaft 3 journaled in bearings 5.
  • the rotor 2 comprises a series of radial, angularly spaced notches 6 in which the movable members usually referred to as vanes" but consisting in this example of cylindrical rollers are slidably mounted.
  • vanes any other suitable vanes types may be used, such as parallelipipedic, prismatic or other vanes.
  • the vanes 7 form in conjunction with the inner surface 8 of a ring 9 as many chambers 10.
  • This ring 9 is set offcenter to the rotor axis 0 as shown by the distance e (FIG. 2), and acts as a cam member.
  • a sliding control member 11 formed with a notch 12 engaged by a stud 13 carried by the outer periphery of ring 9 is movable in the bore ofa tangent cylinder 14 and constitutes, with its face 15 and the bottom 16 of the cylinder, a chamber 17 adapted to receive hydraulic control fluid through an inlet union 18.
  • a spring 19 reacts on the one hand against the opposite face 20 of sliding member 11, and on the other hand against a plug 21 formed with an inner groove receiving a gasket or seal 22. The plug 21 is held against movement by a circlip 23.
  • the pump casing 1 comprises an inlet port 24 and an outlet port 25 of arcuate configuration as currently known in the art.
  • the ring 9 engages with one face 26 a shouldered portion of casing 1.
  • a flange 27 constituting the extension of the fluid inlet and outlet ports 24, 25 fits with a cylindrical outer surface 28 in a bore 29 formed in the pump casing l and engages with its inner front face 30 the ring 9.
  • One or a plurality of springs 3] keep the flange 27 in contact with the ring 9.
  • a cover or cap 32 fitting in a cylindrical eccentric surface 33 of flange 27 and secured to the casing l by means of screws 34 holds the spring or springs 31.
  • This cover 32 comprising a fluid inlet 24' forms with the flange 27 a chamber 35 connected through a passage 36 with the pump outlet port 25.
  • This chamber 35 has a wall 37 receiving the output pressure of the pump.
  • a pair of 0- rings 38 and 39 in flange 27 and another O-ring 40 in the pump casing l in the joint plane ofcover 32 seal the assembly.
  • This pump operates as follows:
  • the ring 9 having its lower portion pivoted in the casing l by means of a roller 41 fitting in a corresponding recess of said casing is adjustable in relation to the rotor axis by pivoting about the axis 0' of roller 41 from an initial position in which the axis of ring 9 is coincident with the axis 0 of the pump casing, up to a maximum eccentric value 2 corresponding to the maximum volumetric capacity of the pump. This adjustment is controlled by removing hydraulic fluid from the chamber 17 at the rear end of sliding member 11.
  • lt is known that the volume of each chamber of the pump varies as the rotor 2 operates, in order to produce the necessary pumping action.
  • the magnitude of the eccentricity e of ring 9 in relation to rotor 2 controls the change of volume in said chambers 10 and therefore the pump capacity.
  • the flange 27 can rotate moderately about axes perpendicular to the pump axis and engages the ring 9 in order to push the face 26 thereof against the shoulder machined in the casing l.
  • the forces urging the flange 27 against the ring 9 are produced on the one hand by the moderate pressure of springs 31 and on the other hand by the pump output pressure exerted in chamber 35.
  • chamber 35 (and therefore the diameters of cylinders 28 and 33) are so calculated that the force pressing the flange 27 against ring 9 is only slightly greater than that created by the fluid pressure within the ring and tending to push the flange 27.
  • the center of gravity of surface 37 (or the point of application of the pressure efforts) is substantially coincident with the point of application of the forces of the inner pressures to ring 9.
  • this pump type is applicable to advantage to all circuits operating under lowand medium-pressure conditions.
  • a variable-capacity vane pump comprising a hollow casing formed with a cylindrical inner peripheral surface and having a low pressure fluid inlet and a high-pressure fluid outlet, a coaxial rotor in the casing rigid with a driving shaft, sliding radial vanes disposed in notches provided in the rotor at spaced intervals, a ring member inside said inner peripheral surface adapted to pivot in a transverse plane about a fixed axis and forming pumping chambers in conjunction with said sliding radial vanes, said motor and said casing, a sealing member crowned by a cover, said ring member having a first front face engaging the pump casing and a second front face opposite to the first and pressed by an effort exerted by said sealing member having two external cylindrical surfaces each with a circular base which are staggered both axially and radially on this sealing member, said sealing member being kept in contact with said ring member by at least one resilient member and coacting with'the pump casing and with said cover to constitute a fluid chamber

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
US23780A 1969-04-09 1970-03-30 Variable-capacity vane pumps Expired - Lifetime US3642388A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6910967A FR2040688A5 (de) 1969-04-09 1969-04-09

Publications (1)

Publication Number Publication Date
US3642388A true US3642388A (en) 1972-02-15

Family

ID=9032133

Family Applications (1)

Application Number Title Priority Date Filing Date
US23780A Expired - Lifetime US3642388A (en) 1969-04-09 1970-03-30 Variable-capacity vane pumps

Country Status (5)

Country Link
US (1) US3642388A (de)
JP (1) JPS5030848B1 (de)
DE (1) DE2017036A1 (de)
FR (1) FR2040688A5 (de)
GB (1) GB1299456A (de)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3760478A (en) * 1971-10-04 1973-09-25 Borg Warner Method for assembling a rotary sliding vane compressor
US4578948A (en) * 1984-11-01 1986-04-01 Sundstrand Corporation Reversible flow vane pump with improved porting
US4697991A (en) * 1984-04-09 1987-10-06 Nippondenso Co., Ltd. Rotary pump having clutch which selects suitable power source
US5100308A (en) * 1989-03-25 1992-03-31 Gebr. Becker Gmbh & Co. Vane pump with adjustable housing and method of assembly
DE4201257A1 (de) * 1992-01-18 1993-07-22 Glyco Metall Werke Regelbare fluegelzellenpumpe mit druckstueck
US6688862B2 (en) 2000-06-29 2004-02-10 Tesma International Inc. Constant flow vane pump
US20050280233A1 (en) * 2004-06-21 2005-12-22 Cole Jeffrey E Occupant-propelled fluid powered rotary device, truck, wheeled platform, or vehicle
US20050280232A1 (en) * 2004-06-21 2005-12-22 Cole Jeffrey E Occupant-propelled fluid powered rotary device, truck, wheeled platform, or vehicle
US20070001415A1 (en) * 2005-06-21 2007-01-04 Cole Jeffrey E Truck assembly for a skateboard, wheeled platform, or vehicle
WO2007093637A1 (de) 2006-02-16 2007-08-23 Roland Eckgold Einstellbarer segmentverdränger
US20080001375A1 (en) * 2004-06-21 2008-01-03 Cole Jeffrey E Truck assembly for a skateboard, wheeled platform, or vehicle
US7374179B2 (en) 2004-06-21 2008-05-20 Cole Jeffrey E Truck assembly for a skateboard, wheeled platform, or vehicle
US20150240807A1 (en) * 2014-02-21 2015-08-27 Joma-Polytec Gmbh Adjustable vane pump

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1140392A (en) * 1978-07-24 1983-02-01 David A. Schuster Variable displacement pump
DE3024207A1 (de) * 1980-06-27 1982-01-14 Valentin Ing.(grad.) 4018 Langenfeld Emmerich Drehschieberkompressor
JPS58107884A (ja) * 1981-12-22 1983-06-27 Toyoda Mach Works Ltd 電磁制御式可変容量形ベ−ンポンプ

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2490115A (en) * 1942-10-28 1949-12-06 Bendix Aviat Corp Variable displacement rotary pump
US2685256A (en) * 1951-12-05 1954-08-03 Marion W Humphreys Rotary pump, motor, and the like
US2708884A (en) * 1949-12-12 1955-05-24 Desier J Deschamps High speed and pressure vane pump
US2782724A (en) * 1950-05-11 1957-02-26 Marion W Humphreys Vane-type rotary pumps and motors
US2949081A (en) * 1956-04-25 1960-08-16 Hydro Aire Inc Pumping cavity for rotary vane pump
US3209699A (en) * 1965-04-13 1965-10-05 Ludovicus H Baghuis Adjustable machines of the vane type

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2490115A (en) * 1942-10-28 1949-12-06 Bendix Aviat Corp Variable displacement rotary pump
US2708884A (en) * 1949-12-12 1955-05-24 Desier J Deschamps High speed and pressure vane pump
US2782724A (en) * 1950-05-11 1957-02-26 Marion W Humphreys Vane-type rotary pumps and motors
US2685256A (en) * 1951-12-05 1954-08-03 Marion W Humphreys Rotary pump, motor, and the like
US2949081A (en) * 1956-04-25 1960-08-16 Hydro Aire Inc Pumping cavity for rotary vane pump
US3209699A (en) * 1965-04-13 1965-10-05 Ludovicus H Baghuis Adjustable machines of the vane type

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3760478A (en) * 1971-10-04 1973-09-25 Borg Warner Method for assembling a rotary sliding vane compressor
US4697991A (en) * 1984-04-09 1987-10-06 Nippondenso Co., Ltd. Rotary pump having clutch which selects suitable power source
US4578948A (en) * 1984-11-01 1986-04-01 Sundstrand Corporation Reversible flow vane pump with improved porting
FR2572470A1 (fr) * 1984-11-01 1986-05-02 Sundstrand Corp Pompe a palettes a ecoulement reversible.
US5100308A (en) * 1989-03-25 1992-03-31 Gebr. Becker Gmbh & Co. Vane pump with adjustable housing and method of assembly
DE4201257A1 (de) * 1992-01-18 1993-07-22 Glyco Metall Werke Regelbare fluegelzellenpumpe mit druckstueck
US6688862B2 (en) 2000-06-29 2004-02-10 Tesma International Inc. Constant flow vane pump
US7631884B2 (en) 2004-06-21 2009-12-15 Jeffrey E Cole Truck assembly for a skateboard, wheeled platform, or vehicle
US7374179B2 (en) 2004-06-21 2008-05-20 Cole Jeffrey E Truck assembly for a skateboard, wheeled platform, or vehicle
US7040638B2 (en) 2004-06-21 2006-05-09 Jeffrey Eaton Cole Occupant-propelled fluid powered rotary device, truck, wheeled platform, or vehicle
US20100090424A1 (en) * 2004-06-21 2010-04-15 Cole Jeffrey E Truck assembly for a skateboard, wheeled platform, or vehicle
US7216876B2 (en) 2004-06-21 2007-05-15 Cole Jeffrey E Occupant-propelled fluid powered rotary device, truck, wheeled platform, or vehicle
US20050280233A1 (en) * 2004-06-21 2005-12-22 Cole Jeffrey E Occupant-propelled fluid powered rotary device, truck, wheeled platform, or vehicle
US20080001375A1 (en) * 2004-06-21 2008-01-03 Cole Jeffrey E Truck assembly for a skateboard, wheeled platform, or vehicle
US20050280232A1 (en) * 2004-06-21 2005-12-22 Cole Jeffrey E Occupant-propelled fluid powered rotary device, truck, wheeled platform, or vehicle
US7635136B2 (en) 2005-06-21 2009-12-22 Jeffrey E. Cole Truck assembly for a skateboard, wheeled platform, or vehicle
US20100001484A1 (en) * 2005-06-21 2010-01-07 Cole Jeffrey E Truck assembly for a skateboard, wheeled platform, or vehicle
US20070001415A1 (en) * 2005-06-21 2007-01-04 Cole Jeffrey E Truck assembly for a skateboard, wheeled platform, or vehicle
US7744100B2 (en) 2005-06-21 2010-06-29 Jeffrey E. Cole Truck assembly for a skateboard, wheeled platform, or vehicle
WO2007093637A1 (de) 2006-02-16 2007-08-23 Roland Eckgold Einstellbarer segmentverdränger
US20150240807A1 (en) * 2014-02-21 2015-08-27 Joma-Polytec Gmbh Adjustable vane pump

Also Published As

Publication number Publication date
DE2017036A1 (de) 1971-04-01
FR2040688A5 (de) 1971-01-22
GB1299456A (en) 1972-12-13
JPS5030848B1 (de) 1975-10-04

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