CA2443367A1 - Variable displacement pump having a rotating cam ring - Google Patents

Variable displacement pump having a rotating cam ring Download PDF

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Publication number
CA2443367A1
CA2443367A1 CA002443367A CA2443367A CA2443367A1 CA 2443367 A1 CA2443367 A1 CA 2443367A1 CA 002443367 A CA002443367 A CA 002443367A CA 2443367 A CA2443367 A CA 2443367A CA 2443367 A1 CA2443367 A1 CA 2443367A1
Authority
CA
Canada
Prior art keywords
fuel pump
cam
housing
pump
cam sleeve
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.)
Granted
Application number
CA002443367A
Other languages
French (fr)
Other versions
CA2443367C (en
Inventor
Martin A. Clements
Lowell D. Hansen
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.)
Eaton Industrial Corp
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to CA2715436A priority Critical patent/CA2715436C/en
Publication of CA2443367A1 publication Critical patent/CA2443367A1/en
Application granted granted Critical
Publication of CA2443367C publication Critical patent/CA2443367C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/08—Rotary pistons
    • F01C21/0809—Construction of vanes or vane holders
    • 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
    • F04C2/3441—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 one line or continuous surface substantially parallel to the axis of rotation
    • F04C2/3442—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 one line or continuous surface substantially parallel to the axis of rotation the surfaces of the inner and outer member, forming the working space, being surfaces of revolution
    • 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
    • F04C2220/00—Application
    • F04C2220/24—Application for metering throughflow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2203/00—Non-metallic inorganic materials
    • F05C2203/08—Ceramics; Oxides
    • F05C2203/0804—Non-oxide ceramics
    • F05C2203/0813—Carbides
    • F05C2203/0826—Carbides of wolfram, e.g. tungsten carbide

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Friction Gearing (AREA)

Abstract

Vane pump (10) mechanical losses are reduced by removing vane friction losses and replacing them with lower magnitude journal bearing fluid film viscous drag losses. A freely rotating cam ring (70) is supported by a journal bearing (80). A relatively low sliding velocity is imposed between the cam ring and the vanes (26). This permits the use of less expensive and less brittle materials in the pump by allowing the pump to operate at much higher speeds without concern for exceeding vane tip velocity limits.

Claims (25)

1. ~A variable displacement gas turbine fuel pump comprising:
a housing having a pump chamber, and an inlet and outlet in fluid communication with the pump chamber;
a rotor received in the pump chamber;
a cam member surrounding the rotor and freely rotating relative to the housing;
a cam sleeve radially interposed between the cam member and the housing;
means for altering a position of the cam sleeve in the housing to selectively vary pump output; and a journal bearing interposed between the cam member and the cam sleeve for reducing mechanical losses during operation of the pump.
2. ~The fuel pump of claim 1 wherein the cam member has a smooth, inner peripheral wall that allows the rotor to rotate freely relative to the cam member.
3. ~The fuel pump of claim 1 wherein the journal bearing is a continuous annular passage between the cam member and the cam sleeve.
4. ~The fuel pump of claim 1 further comprising circumferentially spaced vanes operatively associated with the rotor.
5. ~The fuel pump of claim 1 further comprising a cam sleeve radially interposed between the cam member and the housing.
6. ~The fuel pump of claim 5 further comprising means for altering a position of the cam sleeve in the housing to selectively vary pump output.
7. ~The fuel pump of claim 1 further comprising a spacer ring radially interposed between the cam sleeve and the housing.
8. ~The fuel pump of claim 7 wherein the cam sleeve is pivotally secured to the spacer ring to selectively vary an offset between the cam member and the rotor.
9.~The fuel pump of claim 1 wherein the journal bearing is a hydrostatic bearing.
10. ~The fuel pump of claim 1 wherein the journal bearing is a hydrodynamic bearing.
11. ~The fuel pump of claim 1 wherein the journal bearing is a hybrid hydrostatic/hydrodynamic bearing.
12. ~A variable displacement gas turbine fuel pump for supplying jet fuel from a supply to a set of downstream nozzles, the gas turbine fuel pump comprising:
a housing having a fuel inlet and a fuel, outlet in operative communication with a pump chamber;~
a rotor received in the pump chamber, the rotor having plural vanes that segregate the pump chamber into individual pump chamber portions;
a cam ring received around the rotor having radially inner and outer surfaces, the inner surface slidingly engaging the vanes;
a cam sleeve radially interposed between the cam ring and the housing;
means for altering a position of the cam sleeve in the housing to selectively vary pump output; and a cam journal bearing surrounding the cam ring in communication with the fuel inlet whereby jet fuel serves as the fluid film in the journal bearing for the cam ring.
13. ~The fuel pump of claim 12 wherein the journal bearing is a hydrodynamic bearing.
14. ~The fuel pump of claim 12 wherein the journal bearing is a hydrostatic bearing.
15. The fuel pump of claim 12 wherein the journal bearing is a hybrid hydrostatic/hydrodynamic bearing.
16. The fuel pump of claim 12 wherein a center of the cam sleeve enclosing the cam ring is selectively offset from a rotational axis of the rotor.
17. The fuel pump of claim 12 wherein the journal bearing is a continuous annular passage between the cam ring and the cam sleeve.
18. The fuel pump of claim 12 further comprising circumferentially spaced vanes operatively associated with the rotor.
19. The fuel pump of claim 12 further comprising a cam sleeve radially interposed between the cam ring and the housing.
20. The fuel pump of claim 19 further comprising means for altering a position of the cam sleeve in the housing to selectively vary pump output.
21. The fuel pump of claim 19 further comprising a spacer ring radially interposed between the cam sleeve and the housing.
22. The fuel pump of claim 21 wherein the cam sleeve is pivotally secured to the spacer ring to selectively vary the eccentricity between the cam ring and the rotor.
23. The fuel pump of claim 12 wherein the vanes are formed of tungsten carbide,
24. The fuel pump of claim 12 wherein the cam ring is formed of a low cost, durable material.
25. A method of operating a gas turbine fuel pump that includes a housing having a pump chamber that receives a rotor therein and a cam member surrounding the rotor, a cam sleeve surrounding the cam member and a spacer ring disposed between the cam sleeve and the housing, the method comprising the steps of:
supporting the cam member via a journal bearing in the housing;
allowing the rotor to rotate freely relative to the cam member; and linearly translating a centerpoint of the cam sleeve to limit pressure pulsations in seal zones of the assembly.

25. The fuel pump of claim 8 wherein the spacer ring includes a generally planar surface that allows a centerpoint of the cam sleeve to linearly translate.

27. The fuel pump of claim 8 wherein the spacer ring includes a generally planar surface along are inner surface thereof upon which the cam sleeve rolls in response to actuation of the altering means.

28. The fuel pump of claim 1 further comprising a spacer ring radially interposed between the cam sleeve arid the housing, and an anti-rotation pin interconnecting the spacer ring and the cam sleeve.

29. The fuel pump of claim 28 wherein the spacer ring includes a generally planar surface along an inner surface thereof adjacent the anti-rotation pin.

30. The method of claim 29 wherein the spacer ring includes generally planar surfaces on opposite sides of the anti-rotation pin.

31. The fuel pump of claim 12 further comprising a spacer ring radially interposed between the cam sleeve and the housing, and an anti-rotation pin interconnecting the spacer ring and the cam sleeve.

32. The fuel pump of claim 31 wherein the spacer ring includes a generally planar surface along an inner surface thereof adjacent the anti-rotation pin upon which the cam sleeve rolls in response to actuation of the altering means.
CA2443367A 2001-04-05 2002-03-27 Variable displacement pump having a rotating cam ring Expired - Fee Related CA2443367C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA2715436A CA2715436C (en) 2001-04-05 2002-03-27 Variable displacement pump having a rotating cam ring

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US28163401P 2001-04-05 2001-04-05
US60/281,634 2001-04-05
PCT/US2002/009298 WO2002081921A1 (en) 2001-04-05 2002-03-27 Variable displacement pump having a rotating cam ring

Related Child Applications (1)

Application Number Title Priority Date Filing Date
CA2715436A Division CA2715436C (en) 2001-04-05 2002-03-27 Variable displacement pump having a rotating cam ring

Publications (2)

Publication Number Publication Date
CA2443367A1 true CA2443367A1 (en) 2002-10-17
CA2443367C CA2443367C (en) 2011-03-15

Family

ID=23078142

Family Applications (2)

Application Number Title Priority Date Filing Date
CA2443367A Expired - Fee Related CA2443367C (en) 2001-04-05 2002-03-27 Variable displacement pump having a rotating cam ring
CA2715436A Expired - Fee Related CA2715436C (en) 2001-04-05 2002-03-27 Variable displacement pump having a rotating cam ring

Family Applications After (1)

Application Number Title Priority Date Filing Date
CA2715436A Expired - Fee Related CA2715436C (en) 2001-04-05 2002-03-27 Variable displacement pump having a rotating cam ring

Country Status (8)

Country Link
EP (1) EP1384005B1 (en)
JP (1) JP4215515B2 (en)
KR (1) KR20040004577A (en)
CN (2) CN100557244C (en)
AT (1) ATE310164T1 (en)
CA (2) CA2443367C (en)
DE (1) DE60207401T2 (en)
WO (1) WO2002081921A1 (en)

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CN100379990C (en) * 2003-07-07 2008-04-09 尤尼西亚Jkc控制系统株式会社 Vane pump
JP2007530873A (en) * 2004-03-29 2007-11-01 アーゴ−テック・コーポレーション Variable displacement pump with double displacement capacity used to prevent over-thrust of engines with fuel system heat benefits
EP1769208B1 (en) 2004-06-30 2013-07-10 Eaton Industrial Corporation Heat exchanger
ITBO20040716A1 (en) * 2004-11-19 2005-02-19 H P E High Performance Enginee VARIABLE FLOW PUMP PUMP, IN PARTICULAR FOR OIL
ITBO20040088U1 (en) * 2004-11-19 2005-02-19 H P E High Performance Engineering OIL PUMP WITH VARIABLE FLOW PALLETS
US7484939B2 (en) 2004-12-17 2009-02-03 Eaton Corporation Variable displacement radial piston pump
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Also Published As

Publication number Publication date
JP4215515B2 (en) 2009-01-28
CN101968053B (en) 2013-06-19
CA2443367C (en) 2011-03-15
DE60207401D1 (en) 2005-12-22
EP1384005A1 (en) 2004-01-28
KR20040004577A (en) 2004-01-13
WO2002081921A1 (en) 2002-10-17
EP1384005B1 (en) 2005-11-16
CN100557244C (en) 2009-11-04
CA2715436A1 (en) 2002-10-17
EP1384005A4 (en) 2004-10-13
CA2715436C (en) 2015-03-10
DE60207401T2 (en) 2006-08-10
WO2002081921B1 (en) 2003-03-20
CN101968053A (en) 2011-02-09
CN1531629A (en) 2004-09-22
JP2004522902A (en) 2004-07-29
ATE310164T1 (en) 2005-12-15

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Effective date: 20170327