GB1118053A - Axial piston hydraulic pump - Google Patents

Axial piston hydraulic pump

Info

Publication number
GB1118053A
GB1118053A GB26687/65A GB2668765A GB1118053A GB 1118053 A GB1118053 A GB 1118053A GB 26687/65 A GB26687/65 A GB 26687/65A GB 2668765 A GB2668765 A GB 2668765A GB 1118053 A GB1118053 A GB 1118053A
Authority
GB
United Kingdom
Prior art keywords
pump
cam plate
handle
make
liquid
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
Application number
GB26687/65A
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.)
Sundstrand Corp
Original Assignee
Sundstrand 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
Priority claimed from US461356A external-priority patent/US3282225A/en
Application filed by Sundstrand Corp filed Critical Sundstrand Corp
Publication of GB1118053A publication Critical patent/GB1118053A/en
Expired 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
    • 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
    • F04B1/2014—Details or component parts
    • F04B1/2064—Housings
    • 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
    • F04B1/2014—Details or component parts
    • F04B1/2021—Details or component parts characterised by the contact area between cylinder barrel and valve plate
    • 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
    • F04B1/26—Control
    • F04B1/30—Control of machines or pumps with rotary cylinder blocks
    • F04B1/32—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block
    • F04B1/324—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block by changing the inclination of the swash plate
    • 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
    • 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
    • F04B23/14—Combinations of two or more pumps the pumps being of different types at least one pump being of the non-positive-displacement type

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Control Of Fluid Gearings (AREA)

Abstract

1,118,053. Hydrostatic transmissions. SUNDSTRAND CORP. 23 June, 1965 [2 July, 1964; 4 June, 1965], No. 26687/65. Headings F2C and F2D. [Also in Division F1] In a hydrostatic transmission comprising an axial piston pump and a motor 69, the pump cam plate 63 is adjustable on both sides of the neutral position by a handle 84 and the cam plate is movable in a stroke decreasing direction against the bias of a torsion spring 88 when the pump outlet pressure exceeds a predetermined maximum value at a particular pump speed. The cam plate 63 is subjected to a net stroke decreasing piston moment due to the fluid pressure acting on the pistons 62 and the inertia of the pistons and this is just balanced by the spring 88 at the maximum desired outlet pressure in all adjustment positions of the handle 84. A spool valve 75 controls the flow of excess liquid through an outlet 76 supplied to the transmission circuit by a make-up pump formed by grooves 66 in the pump cylinder block 61 and valve plate 65. In a further embodiment, Figs. 6 to 8 (not shown), an axial piston pump 310 is in closed circuit with a geartype motor 311, a gear pump 374 supplying make-up liquid to the circuit. Excess make-up liquid flows via a relief valve 396, the pump housing 312 and a filter 302 to a make-up liquid reservoir 382. The pump cam plate 346 is angularly adjustable on both sides of neutral by a handle 350 and a torsion spring holds an arm, fixed to the cam plate, in alignment with the handle against the net piston moment exerted thereon. To provide for free wheeling of a vehicle fitted with the transmission a needle valve 460 is provided to connect the inlet and outlet lines 461, 462 of the pump.
GB26687/65A 1964-07-02 1965-06-23 Axial piston hydraulic pump Expired GB1118053A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US37996864A 1964-07-02 1964-07-02
US461356A US3282225A (en) 1965-06-04 1965-06-04 Pump swashplate control

Publications (1)

Publication Number Publication Date
GB1118053A true GB1118053A (en) 1968-06-26

Family

ID=27008843

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26687/65A Expired GB1118053A (en) 1964-07-02 1965-06-23 Axial piston hydraulic pump

Country Status (2)

Country Link
DE (1) DE1528545A1 (en)
GB (1) GB1118053A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2307009A (en) * 1995-11-13 1997-05-14 Nisshin Spinning A hydraulic drive unit and piston pump for use therein

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3744420C2 (en) * 1987-10-24 1995-01-26 Holder Gmbh & Co Geb Control device for a hydrostatic transmission driven by an internal combustion engine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2307009A (en) * 1995-11-13 1997-05-14 Nisshin Spinning A hydraulic drive unit and piston pump for use therein
US5868555A (en) * 1995-11-13 1999-02-09 Nisshinbo Industries, Inc. Hydraulic drive unit of a press machine and a swash plate type variable capacity axial piston pump to use for said device
US5975858A (en) * 1995-11-13 1999-11-02 Nisshinbo Industries, Inc. Hydraulic drive unit of a press machine and swash plate type variable capacity axial piston pump to use for said device
GB2307009B (en) * 1995-11-13 2000-04-12 Nisshin Spinning A hydraulic drive unit and piston pump for use therein

Also Published As

Publication number Publication date
DE1528545A1 (en) 1970-04-23

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