US3904318A - Fluid energy translating device - Google Patents

Fluid energy translating device Download PDF

Info

Publication number
US3904318A
US3904318A US494696A US49469674A US3904318A US 3904318 A US3904318 A US 3904318A US 494696 A US494696 A US 494696A US 49469674 A US49469674 A US 49469674A US 3904318 A US3904318 A US 3904318A
Authority
US
United States
Prior art keywords
barrel
shaft
translating device
fluid energy
energy translating
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
US494696A
Other languages
English (en)
Inventor
Ellis H Born
Alan H Viles
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.)
Hagglunds Denison Corp
Original Assignee
Abex Corp
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 Abex Corp filed Critical Abex Corp
Priority to US494696A priority Critical patent/US3904318A/en
Priority to CA229,858A priority patent/CA1020809A/en
Priority to GB26778/75A priority patent/GB1510998A/en
Priority to IT50460/75A priority patent/IT1040917B/it
Priority to FR7522598A priority patent/FR2280805A1/fr
Priority to JP50089997A priority patent/JPS5138102A/ja
Priority to DE19752534539 priority patent/DE2534539B2/de
Application granted granted Critical
Publication of US3904318A publication Critical patent/US3904318A/en
Priority to JP1980191707U priority patent/JPS56149078U/ja
Assigned to HAGGLUNDS DENISON CORPORATION reassignment HAGGLUNDS DENISON CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ABEX CORPORATION
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00—Pumping installations or systems
    • F04B23/04—Combinations of two or more pumps
    • F04B23/08—Combinations of two or more pumps the pumps being of different types
    • F04B23/10—Combinations of two or more pumps the pumps being of different types at least one pump being of the reciprocating positive-displacement type
    • F04B23/106—Combinations of two or more pumps the pumps being of different types at least one pump being of the reciprocating positive-displacement type being an axial piston pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B1/2007—Arrangements for pressing the cylinder barrel against the valve plate, e.g. by fluid pressure
    • 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
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/0061—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions

Definitions

  • the instant invention relates generally to axial piston type pumps and motors (genericly referred to as fluid energy translating devices) and more specifically to an axial piston pump having a device for driving a servo pump and clamping the main pump barrel against its port plate.
  • a common type of axial piston pump includes a hous' ing having a rotatably mounted barrel with a plurality of axial cylinder bores.
  • a port plate is interposed between the barrel and the inlet and working ports of the device to alternately connect each cylinder with the inlet and working ports as the device is rotated.
  • Within each bore is a piston which is connected by shoes to a thrust plate assembly which reciprocates the pistons to pump fluid as the barrel is rotated.
  • a fixed displace ment or servo pump is driven when the main pump barrcl is rotated to provide servo pressure fluid to operate the main pump controls.
  • a disadvantage of driving a servo pump in this manner is that the servo pump must be large enough to accommodate the relatively large shaft necessary to drive the main pump or one end of the shaft must be of reduced diameter.
  • a further disadvantage of driving a servo pump from the main pump drive shaft is that the drive shaft tends to bend. This shaft bending may cause misalignment of the servo pump components and thereby shorten the life of the servo pump.
  • a servo pump is driven by a device which includes a shaft which is driven by the main pump barrel.
  • the shaft has a spring and an axial adjustment which clamp the main pump barrel against its port plate and limit the distance the barrel can lift off of the port plate.
  • the spring and the axial adjustment also clamp the stationary servo pump member against its port plate which establishes the clearance for the running members of the pump.
  • FIGURE is an axial sectional view of a fluid energy translating device according to the instant invention.
  • an axial piston pump having a case 11 which includes a central housing 12, an end cap 13 affixed by bolts, not shown,
  • Case 11 has a cavity 16 in which a rotatable cylinder barrel 17 is mounted on rollers 18 of a bearing 19 which has its outer race 20 pressed against a housing shoulder 21.
  • a drive shaft 22 passes through a bore 23 in end cap 13 and is rotatably supported in a bearing 24.
  • the inner end 25 of drive shaft 22 is drivingly connected to a central bore 26 in barrel 17.
  • Barrel 17 has a plurality of parallel axial bores 27 equally spaced circumferentially about the rotational axis of the barrel 17.
  • a sleeve 28 in each bore 27 receives a piston 29.
  • Each piston 29 has a ball-shaped head 30 which is received in a socket 31 of a shoe 32.
  • Each shoe 32 is retained against a flat creep or thrust plate 33 mounted on a movable rocker cam 34 by a shoe retainer assembly 35.
  • Assembly 35 includes a shoe retainer plate 36, with a number of equally spaced bores equal to the number of pistons 29, which passes over the body of each piston and engages a shoulder 37 on each shoe 32.
  • the shoe retainer plate 36 has a central bore 38 which passes over a post 39 affixed to rocker cam 34 by a Snap ring 40.
  • a spacer 41 is interposed between the shoe retainer plate 36 and a snap ring 42 which secures the shoe retainer plate 36 on the post 39 and prevents the shoes 32 from lifting off of thrust plate 33.
  • Each cylinder bore 27 ends in a cylinder port 43 which conducts fluid between a port plate 44 and the bore 27.
  • Port plate 44 is positioned between barrel 17 and port cap 14.
  • a pair of kidney-shaped apertures, not shown, are formed in the plate 44. These apertures communicate with ports, P P in the port cap 14.
  • One of the ports contains low pressure fluid and is the intake port while the other port contains high pressure or working fluid and is the exhaust port, depending upon the operating conditions of the pump.
  • a second shaft 46 is drivingly connected to the central bore 26 of barrel 17 by a splined end 47.
  • Shaft 46 rotates when barrel 17 is driven and drives a fixed displacement pump which is connected to shaft 46 through a key 45.
  • Shaft 46 is rotatably supported in a first needle bearing 50 mounted in a bore 51 in port cap 14 and in a second needle bearing 52 mounted in a bore 53 in a spring and pressure loaded clamp member 54.
  • Shaft 46 is retained in driving engagement with barrel I7.
  • Barrel ]7 is prevented from moving axially by a snap ring 55, an axially split collar 56 and a spring 57.
  • Spring 57 acting through collar 56 and snap ring 55, biases barrel 17 against port plate 44 which is clamped against port cap 14.
  • the maximum distance barrel 17 can move away from port plate 44 during operation of the pump is the distance between an end face 58 on collar 56 and a shoulder 59 on splined end 47. This distance can be varied by a nut 60 on the threaded other end 61 of shaft 46.
  • a spacer 62 is inserted between nut 60 and a thrust bearing 63 which engages clamp member 54.
  • Clamp member 54 engages an outer housing 64 of the fixed displacement pump which is a rotor type having a gear 67 rotating within a gear 68, commonly referred to as a gerotor pump. This pump provides servo pressure fluid to operate pump controls, not shown, which control the inclination of the rocker cam.
  • Clamp member 54 secures housing 64 against a port plate 65 which is clamped against port cap 14.
  • a pair of kidney-shaped apertures, not shown, are formed in plate 65. These apertures communicate with ports P,,, S, in the port cap 14.
  • One of the ports S contains low pressure servo fluid and is the intake port while the other port P, contains high pressure servo fluid and is the discharge port.
  • Housing 64 is prevented from rotating by a pin 66. Clamping outer housing 64 between member 54 and port plate 65 establishes the proper operating clearance for the rotating members 67, 68.
  • high pressure servo fluid is conducted through a passage 73 into a chamber 69 sandwiched between a retainer 74 and clamp member 54.
  • Retainer 74 is prevented from moving axially away from member 54 by an end cover 70 secured by a snap ring 71 in port cap 14.
  • the servo pressure fluid acts on the member 54 and assists in clamping outer housing 64 against port plate 65. As the pressure of the servo discharge fluid increases, it exerts a greater force on member 54.
  • spring 57 which biases barrel 17 against port plate 44 also provides the force on member 54 to clamp outer housing 64 against port plate 65.
  • servo pressure fluid assists in urging housing 64 against port plate 65.
  • a fluid energy translating device having a housing, a barrel rotatably supported in the housing, a plurality of cylinders in the barrel, a piston mounted for reciprocation in each cylinder, a main drive shaft drivingly connected to the barrel, a surface containing inlet and outlet porting to receive and exhaust fluid to and from said barrel in the housing at one end of the barrel, means for reciprocating the pistons within the cylinders when the barrel is rotated, the improvement comprising: a fixed displacement servo pump, a second shaft to drive said servo pump when said barrel is rotated, a second surface containing inlet and outlet ports in the housing for receiving and exhausting fluid to and from said servo pump, and spring means acting between said second shaft and said barrel for simultaneously biasing said barrel against the first surface and the servo pump against said second surface.
  • the fluid energy translating device recited in claim 4 including drive means on said second shaft for connecting said second shaft to said barrel, said biasing means being located between said drive means and said barrel.
  • An axial piston type fluid energy translating device comprising a housing, a main barrel rotatably supported in the housing and carrying a plurality of pistons, a main drive shaft drivingly connected to the barrel and providing power to rotate the barrel, a main 4port plate mounted in the housing immediately adja cent one end of the barrel, a servo pump having a servo pump member, a second shaft drivingly connected to said barrel and to said servo pump to drive said servo pump when said barrel is rotated by said main drive shaft, a servo port plate immediately adjacent one end of said servo pump member, a spring biasing said main barrel against said main port plate, and said spring also acting against said second shaft and biasing said servo pump member against said servo port plate by a force transmitted axially through said second shaft.
  • An axial piston type fluid energy translating device as defined in claim 13 wherein said spring acts between said main barrel and said second shaft to bias said main barrel in one direction and to bias said second shaft and servo pump member in a direction opposite said first direction.
  • An axial piston type fluid energy translating device as set forth in claim 13, including an axially facing surface operatively connected to said second shaft, and another axially facing surface operatively connected to barrel against the bias of said spring.
  • An axial piston type fluid energy translating device as set forth in claim 15, including adjustment means on said second shaft for regulating the amount said main barrel and engageable with said first men- 5 of axial movement allowed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Reciprocating Pumps (AREA)
  • Hydraulic Motors (AREA)
US494696A 1974-08-02 1974-08-02 Fluid energy translating device Expired - Lifetime US3904318A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US494696A US3904318A (en) 1974-08-02 1974-08-02 Fluid energy translating device
CA229,858A CA1020809A (en) 1974-08-02 1975-06-20 Fluid energy translating device
GB26778/75A GB1510998A (en) 1974-08-02 1975-06-24 Pump assembly
IT50460/75A IT1040917B (it) 1974-08-02 1975-07-10 Perfezionamento nelle pompe a stantuffi assiali
FR7522598A FR2280805A1 (fr) 1974-08-02 1975-07-18 Dispositif de translation d'energie fluide
JP50089997A JPS5138102A (ja) 1974-08-02 1975-07-23
DE19752534539 DE2534539B2 (de) 1974-08-02 1975-08-01 Axialkolbenmaschine
JP1980191707U JPS56149078U (ja) 1974-08-02 1980-12-30

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US494696A US3904318A (en) 1974-08-02 1974-08-02 Fluid energy translating device

Publications (1)

Publication Number Publication Date
US3904318A true US3904318A (en) 1975-09-09

Family

ID=23965580

Family Applications (1)

Application Number Title Priority Date Filing Date
US494696A Expired - Lifetime US3904318A (en) 1974-08-02 1974-08-02 Fluid energy translating device

Country Status (7)

Country Link
US (1) US3904318A (ja)
JP (2) JPS5138102A (ja)
CA (1) CA1020809A (ja)
DE (1) DE2534539B2 (ja)
FR (1) FR2280805A1 (ja)
GB (1) GB1510998A (ja)
IT (1) IT1040917B (ja)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4336003A (en) * 1980-08-11 1982-06-22 Abex Corporation Crane swing control
US4550645A (en) * 1984-04-27 1985-11-05 Sundstrand Corporation Thin valve plate for a hydraulic unit
EP0543601A2 (en) * 1991-11-18 1993-05-26 Hobourn Automotive Limited Rotary assemblies
US5326232A (en) * 1993-04-20 1994-07-05 General Motors Corporation Two stage pump assembly with mechanical disconnect
US5354180A (en) * 1992-07-31 1994-10-11 Linde Aktiengesellschaft Hydrostatic assembly having multiple pumps
US5498140A (en) * 1994-03-16 1996-03-12 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Variable displacement compressor
US6289878B1 (en) 1999-07-15 2001-09-18 Caterpillar Inc. Engine having multiple pumps driven by a single shaft
US6682315B2 (en) * 2001-11-28 2004-01-27 Caterpillar Inc Axial piston pump barrel with a cast high pressure collection cavity
US20090013861A1 (en) * 2006-03-10 2009-01-15 Brueninghaus Hydromatik Gmbh Combined pump housing for several rated quantities
US11236736B2 (en) * 2019-09-27 2022-02-01 Honeywell International Inc. Axial piston pump with port plate having balance feed aperture relief feature

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4111103A (en) * 1977-02-14 1978-09-05 Commercial Shearing, Inc. Thrust rings for swash plate pumps and motors
DD245011B1 (de) * 1985-12-23 1989-07-19 Karl Marx Stadt Ind Werke Hydrostatische axialkolbenmaschine
DE102007032103B4 (de) * 2007-05-16 2022-02-24 Robert Bosch Gmbh Pumpeneinheit mit einer Hauptpumpe und einer in ihrem Fördervolumen verstellbaren Ladepumpe
DE202015101247U1 (de) * 2015-02-05 2016-05-09 I.S.T. Industrie Service Technologie Beratungs- Und Beteiligungsgesellschaft Mbh Pumpe

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1486836A (en) * 1923-04-28 1924-03-11 Hill Compressor & Pump Company Rotary-pump pressure control
US2484337A (en) * 1943-05-01 1949-10-11 Oilgear Co Hydrodynamic machine
US2495685A (en) * 1945-06-08 1950-01-31 Beaman Bernard Two-stage hydraulic pressure pump
US2604047A (en) * 1945-09-19 1952-07-22 Hulman Two-stage hydraulic pressure pump
US2945449A (en) * 1954-06-03 1960-07-19 Bendix Aviat Corp Hydraulic control pump
US3160109A (en) * 1961-05-18 1964-12-08 William L Kline Hydraulic unit
US3188972A (en) * 1963-03-04 1965-06-15 Thoma Jean Ulrich Axial piston hydraulic unit

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1486836A (en) * 1923-04-28 1924-03-11 Hill Compressor & Pump Company Rotary-pump pressure control
US2484337A (en) * 1943-05-01 1949-10-11 Oilgear Co Hydrodynamic machine
US2495685A (en) * 1945-06-08 1950-01-31 Beaman Bernard Two-stage hydraulic pressure pump
US2604047A (en) * 1945-09-19 1952-07-22 Hulman Two-stage hydraulic pressure pump
US2945449A (en) * 1954-06-03 1960-07-19 Bendix Aviat Corp Hydraulic control pump
US3160109A (en) * 1961-05-18 1964-12-08 William L Kline Hydraulic unit
US3188972A (en) * 1963-03-04 1965-06-15 Thoma Jean Ulrich Axial piston hydraulic unit

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4336003A (en) * 1980-08-11 1982-06-22 Abex Corporation Crane swing control
US4550645A (en) * 1984-04-27 1985-11-05 Sundstrand Corporation Thin valve plate for a hydraulic unit
WO1985005147A1 (en) * 1984-04-27 1985-11-21 Sundstrand Corporation Thin valve plate for a hydraulic unit
GB2178489A (en) * 1984-04-27 1987-02-11 Sundstrand Corp Thin valve plate for a hydraulic unit
EP0543601A2 (en) * 1991-11-18 1993-05-26 Hobourn Automotive Limited Rotary assemblies
EP0543601A3 (en) * 1991-11-18 1993-08-04 Hobourn Automotive Limited Rotary assemblies
US5282446A (en) * 1991-11-18 1994-02-01 Hobourn Automotive Ltd. Rotary pump assemblies
US5354180A (en) * 1992-07-31 1994-10-11 Linde Aktiengesellschaft Hydrostatic assembly having multiple pumps
US5326232A (en) * 1993-04-20 1994-07-05 General Motors Corporation Two stage pump assembly with mechanical disconnect
US5498140A (en) * 1994-03-16 1996-03-12 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Variable displacement compressor
US6289878B1 (en) 1999-07-15 2001-09-18 Caterpillar Inc. Engine having multiple pumps driven by a single shaft
US6682315B2 (en) * 2001-11-28 2004-01-27 Caterpillar Inc Axial piston pump barrel with a cast high pressure collection cavity
US20040064943A1 (en) * 2001-11-28 2004-04-08 Gens Thomas D. Axial piston pump barrel with a cast high pressure collection cavity
US7093341B2 (en) 2001-11-28 2006-08-22 Caterpillar Inc. Method of making an axial piston pump barrel with a cast high pressure collection cavity
US20090013861A1 (en) * 2006-03-10 2009-01-15 Brueninghaus Hydromatik Gmbh Combined pump housing for several rated quantities
US8608454B2 (en) * 2006-03-10 2013-12-17 Brueninghaus Hydromatik Gmbh Combined pump housing for several rated quantities
US11236736B2 (en) * 2019-09-27 2022-02-01 Honeywell International Inc. Axial piston pump with port plate having balance feed aperture relief feature

Also Published As

Publication number Publication date
DE2534539C3 (ja) 1978-10-19
DE2534539A1 (de) 1976-02-12
JPS5138102A (ja) 1976-03-30
FR2280805A1 (fr) 1976-02-27
IT1040917B (it) 1979-12-20
DE2534539B2 (de) 1978-02-16
CA1020809A (en) 1977-11-15
GB1510998A (en) 1978-05-17
JPS56149078U (ja) 1981-11-09
FR2280805B1 (ja) 1980-04-18

Similar Documents

Publication Publication Date Title
US3904318A (en) Fluid energy translating device
US5971717A (en) Axial piston machine having a cooling circuit for the cylinders and pistons
US5220225A (en) Integrated electric motor driven inline hydraulic apparatus
US3175510A (en) Variable displacement pump
EP0611887B1 (en) Fluid pressure generation apparatus
US4075933A (en) Hydraulic pump or motor
US4729717A (en) Power transmission
US3255706A (en) Rotary radial piston machines with tangential balancing recesses for the pressure balance of the pistons
EP0691474B2 (en) Axial piston pump
US3657970A (en) Hydraulic pump or motor having a rotary cylinder barrel
US20090155095A1 (en) Radial piston pump
US3648567A (en) Variable displacement axial pump or motor
EP1600372B1 (en) Hydraulic motors
US3241495A (en) Construction for axial piston pump or motor
US3614267A (en) Two-stage fluid pump
US5085127A (en) Cavitation resistant hydraulic cylinder block porting faces
US3774505A (en) Swash plate devices
US4738185A (en) Swash plate-type pump-motor
US4426914A (en) Axial piston pump
US3690789A (en) Hydraulic apparatus
US3789741A (en) Hydrostatic bearing for radial piston pump
US3543649A (en) Axial piston pump or motor device
US3612725A (en) Hydraulic apparatus
US3007420A (en) Hydraulic pump or motor
USRE26519E (en) Variable displacement pump

Legal Events

Date Code Title Description
AS Assignment

Owner name: HAGGLUNDS DENISON CORPORATION, 1220 DUBLIN ROAD, C

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ABEX CORPORATION, A CORP. OF DE;REEL/FRAME:004737/0427

Effective date: 19870630

Owner name: HAGGLUNDS DENISON CORPORATION, OHIO

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ABEX CORPORATION;REEL/FRAME:004737/0427

Effective date: 19870630