US3691910A - Axial piston machine - Google Patents

Axial piston machine Download PDF

Info

Publication number
US3691910A
US3691910A US103444A US3691910DA US3691910A US 3691910 A US3691910 A US 3691910A US 103444 A US103444 A US 103444A US 3691910D A US3691910D A US 3691910DA US 3691910 A US3691910 A US 3691910A
Authority
US
United States
Prior art keywords
cylinder block
machine
chamber
axis
valve plate
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
US103444A
Other languages
English (en)
Inventor
Eckehard Reichel
Gustav Zellbeck
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Application granted granted Critical
Publication of US3691910A publication Critical patent/US3691910A/en
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
    • 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

Definitions

  • ABSTRACT A housing defines an elongated interior chamber bounded by an inner circumferential wall surface and having a longitudinal axis.
  • a cylinder block is mounted in the chamber for rotation and has two axial ends and a plurality of open-ended passages paralleling the axis.
  • a tilt plate is arranged in the chamber adjacent one end of the block and has a surface inclined to the axis and facing this one end, with a-plurality of pistons being respectively reciprocably received in the passages and each having a free end-portion which bears upon the inclined surface of the tilt plate to slide thereon during rotation of the cylinder block.
  • a stationary valve plate is mounted in the chamber and slide in contact'with the outer end of the block and has a circumferential edge face facing the inner wall surface and a plurality of apertures adapted for registry with the bores of the cylinder block. At least one circumferential recess provided in the edge face extends inwardly towards but short of the aforementioned apertures.
  • the present invention relates generally to an axial piston machine, and more particularly to an axial piston machine with a rotating cylinder block.
  • German Pat. No. 1,243,020 teaches an axial piston machine having a rotating cylinder block with which a cylindrical component is made fast at the side which faces the valve plate surface which is provided on a stationary housing component, and in which inlet and outlet means are provided for pressure medium.
  • the cylinder block bears with the associated cylindrical component upon a roller bearing in such a manner that a narrow gap exists between this component and the adjacent valve plate surface.
  • the circumferential edge face of the cylindrical component which is fast with the cylinder block is formed with a radially extending annular groove whose purpose is to permit the component to become deformed in axial direction at rising operating pressure in such a manner that the width of the aforementioned gap becomes smaller and leak oil losses are kept to an acceptable value.
  • this measure also prevents a seizing of the relatively movable constituent components of the device.
  • an axial piston machine which, briefly stated, comprises a housing defining an elongated interior chamber having a longitudinal axis and an inner circumferential wall surface.
  • a cylinder block is mounted for rotation in this chamber and has two axial ends and a plurality of open-ended passages at least substantially paralleling the axis of the housing chamber.
  • a tilt plate is provided in the chamber adjacent one end of the block and has a surface which is inclined to the axis and which faces this one end.
  • a plurality of pistons is respectively reciprocably received in the passages and each has a free end portion bearing upon the surface of the tilt plate and being slidable thereon during rotation of the cylinder block.
  • a stationary valve plate is mounted in the chamber in sliding contact with the other end of the block and has a circumferential edge face which faces the wall surface bounding the chamber and a plurality of apertures adapted for registry with the bores of the rotating cylinder block. At least one circumferential recess is provided in the edge face of the valve plate and extends inwardly towards but short of these apertures.
  • FIG. 1 is a longitudinal section through an axial piston machine according to the present invention
  • FIG. 2 is a fragmentary axial section through a valve plate such as used in FIG. 1, but of a different embodiment
  • FIG. 3 is a view similar to FIG. 2 but of still another embodiment.
  • reference numeral 1 identifies a cylindrical housing which is provided at the dry side thereof with a cover enclosing it.
  • the cover is provided in turn with a journal 3 for a drive shaft 4, and also with an inclined surface 5 on which a tilt plate 7 of annular configuration is supported via the intermediary of rollers 6.
  • the surface 7a of the tilt plate 7 is inclined to the longitudinal axis of the chamber defined in the cylindrical housing 1 and against this surface abut the rounded ends of pistons 8 which are reciprocably accommodated in bores 9 of a cylinder block 10 of generally cylindrical configuration.
  • the cylinder block 10 is rotated by the drive shaft 4 via a splined or toothed connection 1 l and pressed against a valve plate 12 which is non-rotatably mounted in the housing 11, for which purpose a non-illustrated retaining pin or the like may be provided.
  • the valve plate 12 in turn abuts against a cover 13 closing the end of the housing opposite the cover 2 (that is the end which in FIG. 1 is the uppermost one) and in which a further journal 14 for the drive shaft 4 is provided.
  • the drawing shows that the drive shaft passes through the rotating cylinder block 10 axially and centrally thereof.
  • the valve plate 12 is provided with several apertures 15 which cooperate with the bores 9 in the cylinder block 10.
  • the opposite axial end faces of the valve plate 12 are provided with small spacing from the apertures 15 with annular grooves 16, 17, 18 and 19 between which sealing ribs 20, 21, 22 and 23 remain which circumferentially surround the apertures 15 radially outwardly thereof.
  • the outer circumferential edge face of the valve plate 12 is provided with a circumferential recess or annular groove 24 the flanks or side walls of which in the embodiment of FIG. I extend in parallelism with one another.
  • the groove 24 extends inwardly from the edge face 12a towards but short of the apertures 15.
  • An inlet opening 25 and an outlet opening 26 are both provided in the cover 13 and communicate in known manner with substantially kidney-shaped openings which in turn communicate with the apertures 15.
  • valve plate 12 When the axial piston machine illustrated in FIG. 1 is operated, the valve plate 12 can become so deformed as. a result of expansion due to heating and also as a result of pressures acting upon it, that the gap between the rotating cylinder block and the stationary valve plate 12 becomes sometimes rather large, which would result in an increase of the leak or losses.
  • the invention as disclosed in FIG. 1 avoidsthis difficulty by the provision of the annular groove 24 because stresses which occur during operation of the axial piston machine are relieved and the contact face of the valve plate 12, that is the face engaging the adjacent axial end face of the rotating cylinder block 10, will remain planar instead of becoming deformed, and will thus have optimum surface-to-surface contact with the associated end face of the cylinder block 10. This also significantly reduces the wear at the contacting surfaces of the valve plate 12 and the cylinder block 10, and thus prolongs the useful life of the axial piston machine.
  • the cylinder plate 12' which here is shown fragmentarily, may also be provided with.
  • two grooves 27 instead of the single groove 24 in its outer circumferential surface, and that these grooves may have side walls or flanks which converge in direction towards one another inwardly of the circumferential edge face. It is pointed out that instead of two of the grooves 27, a single groove could also be provided.
  • valve plate which is here identified with reference numeral 12'', may also have two grooves in its outer circumferential surface of which one is identified with reference numeral 24 and corresponds in its cross-sectional configuration to the groove shown in FIG. 1,
  • An axial piston machine comprising a housing defining an elongated interior .chamber having a longitudinal axis and an inner circumferential wall surface; a cylinder block mounted for rotation in said chamber and having two axial ends and a plurality of open-ended passages at least substantially paralleling said axis; a tilt platein said chamber adjacent one of said ends and having a surface inclined to said axis and facing said one end; a plurality of pistons respectively reciprocably received in said passages and each having a free endportion bearing upon said surface and slidable thereon during rotation of said cylinder block; a stationary valve plate mounted in said chamber in sliding contact with the other of said ends, said valve plate having a peripheral margin provided with a circumferential edge face facing but out of contact with said wall surface and a plurality of apertures adapted for registry with said bores of the rotating cylinder block; and at least one circumferential recess in said edge face extending inwardly to the proximity of said apertures but terminating short of the latter, whereby said margin
  • said recess is an annular groove having side faces which are spaced longitudinally of said axis and extend in parallelism with one another.
  • said recess is an annular groove having side faces which converge inwardly towards one another.
  • said recess is an annular groove having side faces which are inclined with reference to one another.
  • said chamber having an open end in the region of said one end of said cylinder block; and further comprising a cover closing said open end and having an inner face directed towards said one end of said cylinder block and supporting said tilt plate thereon.
  • a machine as defined in claim 1 said chamber having an opening in the region of said other end of said cylinder block; and further comprising a closure element closing said opening and contacting said valve plate supporting the same.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
US103444A 1970-01-10 1971-01-04 Axial piston machine Expired - Lifetime US3691910A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE7000688U DE7000688U (de) 1970-01-10 1970-01-10 Axialkolbenmaschine.

Publications (1)

Publication Number Publication Date
US3691910A true US3691910A (en) 1972-09-19

Family

ID=6608670

Family Applications (1)

Application Number Title Priority Date Filing Date
US103444A Expired - Lifetime US3691910A (en) 1970-01-10 1971-01-04 Axial piston machine

Country Status (4)

Country Link
US (1) US3691910A (nl)
CH (1) CH513335A (nl)
DE (1) DE7000688U (nl)
GB (1) GB1301707A (nl)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4982651A (en) * 1987-06-10 1991-01-08 Hitachi, Ltd. Compressor for compressing gases
US5490444A (en) * 1994-10-03 1996-02-13 Dynex/Rivett, Inc. Piston pump with improved hold-down mechanism
US5647266A (en) * 1994-10-03 1997-07-15 Dynex/Rivett, Inc. Hold-down mechanism for hydraulic pump
US6036374A (en) * 1998-07-23 2000-03-14 Alliedsignal Inc. Rotating guide for cam bearing cage
US6675697B1 (en) * 1998-12-07 2004-01-13 Apis Energy Gmbh Inclined plate for axial piston motors

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8713954U1 (de) * 1987-10-17 1987-12-03 Carl Platz Hochdrucktechnik GmbH, 6710 Frankenthal Hochdruckreinigungsgerät

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3482525A (en) * 1968-03-04 1969-12-09 Fluid Controls Inc Rotary pump or motor
US3521532A (en) * 1967-07-21 1970-07-21 Vickers Ltd Hydrodynamic bearings

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3521532A (en) * 1967-07-21 1970-07-21 Vickers Ltd Hydrodynamic bearings
US3482525A (en) * 1968-03-04 1969-12-09 Fluid Controls Inc Rotary pump or motor

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4982651A (en) * 1987-06-10 1991-01-08 Hitachi, Ltd. Compressor for compressing gases
US5490444A (en) * 1994-10-03 1996-02-13 Dynex/Rivett, Inc. Piston pump with improved hold-down mechanism
US5647266A (en) * 1994-10-03 1997-07-15 Dynex/Rivett, Inc. Hold-down mechanism for hydraulic pump
US6036374A (en) * 1998-07-23 2000-03-14 Alliedsignal Inc. Rotating guide for cam bearing cage
US6675697B1 (en) * 1998-12-07 2004-01-13 Apis Energy Gmbh Inclined plate for axial piston motors

Also Published As

Publication number Publication date
GB1301707A (nl) 1973-01-04
CH513335A (de) 1971-09-30
DE7000688U (de) 1971-06-24

Similar Documents

Publication Publication Date Title
US2313407A (en) Power transmission
US1906142A (en) Rotary pump or compressor
US3256831A (en) Rotary pump and fluid motor and sealing means therefor
US3918855A (en) Adjustable vane pump
US3785758A (en) Vane pump with ramp on minor diameter
JPH08219292A (ja) シールリングおよびシール装置
US3691910A (en) Axial piston machine
US3221665A (en) Hydraulic pump or motor with hydraulic pressure-responsive vane
US2312961A (en) Fluid pump or motor
US2679210A (en) Expansible chamber type radial piston engine
US3800673A (en) Wear equalizing arrangement for the valve plate of an axial piston machine
US3851669A (en) Control face arrangement for an axial piston machine
US3030932A (en) Hydraulic radially acting reciprocating engine
US3303749A (en) Hydraulic motors
US3810418A (en) Center ring arrangement for a radial piston machine
US3858487A (en) Radial piston type hydraulic pump or motor
US2208177A (en) Rotary motor
US3844685A (en) Vane machine with pressure bias and balancing means for the rotary control port member
US2528739A (en) High-pressure pump
US3910162A (en) Force compensating arrangement for a radial piston machine
US3800672A (en) Clearance adjusting arrangement for an axial piston machine
US3913456A (en) Slide block control means for radial piston machines
US1594132A (en) Rotary machine
US6429551B1 (en) Oscillating motor
US3862589A (en) Pressure applying arrangement for a multiple flow machine