EP0943798A3 - Axial piston machine with hydrostatic relief of the cylinder bores - Google Patents

Axial piston machine with hydrostatic relief of the cylinder bores Download PDF

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Publication number
EP0943798A3
EP0943798A3 EP99105278A EP99105278A EP0943798A3 EP 0943798 A3 EP0943798 A3 EP 0943798A3 EP 99105278 A EP99105278 A EP 99105278A EP 99105278 A EP99105278 A EP 99105278A EP 0943798 A3 EP0943798 A3 EP 0943798A3
Authority
EP
European Patent Office
Prior art keywords
cylinder bores
pistons
hydrostatic relief
axial piston
piston machine
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
EP99105278A
Other languages
German (de)
French (fr)
Other versions
EP0943798A2 (en
EP0943798B1 (en
Inventor
Rudi Hildebrandt
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.)
Brueninghaus Hydromatik GmbH
Original Assignee
Brueninghaus Hydromatik 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
Priority claimed from DE19815614A external-priority patent/DE19815614B4/en
Application filed by Brueninghaus Hydromatik GmbH filed Critical Brueninghaus Hydromatik GmbH
Publication of EP0943798A2 publication Critical patent/EP0943798A2/en
Publication of EP0943798A3 publication Critical patent/EP0943798A3/en
Application granted granted Critical
Publication of EP0943798B1 publication Critical patent/EP0943798B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04B1/2007—Arrangements for pressing the cylinder barrel against the valve plate, e.g. by fluid pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B3/00—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F01B3/0032—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F01B3/0041—Arrangements for pressing the cylinder barrel against the valve plate, e.g. fluid pressure

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)

Abstract

Die Erfindung betrifft eine Axialkolbenmaschine mit einer um eine Drehachse (47) drehbar gelagerten Zylindertrommel (6), die Zylinderbohrungen (26) aufweist, in welchen Kolben (29) bewegbar geführt sind, die sich an einer Schrägscheibe (3) abstützen. Die Wandungen der Zylinderbohrungen (26) weisen Ausnehmungen zur hydrostatischen Entlastung der Gleitbewegung der Kolben (29) in den Zylinderbohrungen (26) auf. Erfindungsgemäß sind die Ausnehmungen zur hydrostatischen Entlastung als längliche Entlastungsnuten (40) mit einem spiralförmigen oder zick-zack-förmigen Verlauf ausgebildet, die sich axial in den Zylinderbohrungen (26) entlangwinden. Alternativ haben die Zylinderbohrungen (26) einen ovalen Querschnitt und die Kolben (29) einen kreisrunden Querschnitt, wobei sich zwischen der Wandung der Zylinderbohrungen (26) und den Kolben (29) Zwischenräume (70, 71) für die hydrostatische Entlastung der Gleitbewegung der Kolben (29) bilden.

Figure 00000001
The invention relates to an axial piston machine having a cylinder drum (6) which is rotatably mounted about an axis of rotation (47) and which has cylinder bores (26) in which pistons (29) are movably guided, which are supported on a swash plate (3). The walls of the cylinder bores (26) have recesses for hydrostatic relief of the sliding movement of the pistons (29) in the cylinder bores (26). According to the invention, the recesses for hydrostatic relief are designed as elongated relief grooves (40) with a spiral or zigzag shape, which wind axially in the cylinder bores (26). Alternatively, the cylinder bores (26) have an oval cross section and the pistons (29) have a circular cross section, with spaces (70, 71) between the wall of the cylinder bores (26) and the pistons (29) for the hydrostatic relief of the sliding movement of the pistons (29) form.
Figure 00000001
EP19990105278 1998-03-16 1999-03-15 Axial piston machine with hydrostatic relief of the cylinder bores Expired - Lifetime EP0943798B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19811312 1998-03-16
DE19811312 1998-03-16
DE19815614A DE19815614B4 (en) 1998-03-16 1998-04-07 Axial piston machine with hydrostatic relief of cylinders
DE19815614 1998-04-07

Publications (3)

Publication Number Publication Date
EP0943798A2 EP0943798A2 (en) 1999-09-22
EP0943798A3 true EP0943798A3 (en) 2000-06-28
EP0943798B1 EP0943798B1 (en) 2004-08-18

Family

ID=26044643

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19990105278 Expired - Lifetime EP0943798B1 (en) 1998-03-16 1999-03-15 Axial piston machine with hydrostatic relief of the cylinder bores

Country Status (1)

Country Link
EP (1) EP0943798B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021208329A1 (en) 2021-08-02 2023-02-02 Robert Bosch Gesellschaft mit beschränkter Haftung axial piston machine
DE102022207272A1 (en) 2022-07-18 2024-01-18 Robert Bosch Gesellschaft mit beschränkter Haftung Axial piston machine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1403754A1 (en) * 1960-08-31 1969-01-23 Mini Of Technology Pressurized machine with reciprocating piston
FR1595812A (en) * 1968-11-28 1970-06-15
DE2534001A1 (en) * 1975-07-30 1977-02-17 Paul Hammelmann High pressure plunger pump - has cylinder preloaded against pump pressure by shrinking into housing block
JPH07189889A (en) * 1993-12-27 1995-07-28 Tokimec Inc Piston type hydraulic device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4423023C2 (en) 1994-06-30 1998-07-09 Brueninghaus Hydromatik Gmbh Axial piston machine with a cooling circuit for the cylinders and pistons

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1403754A1 (en) * 1960-08-31 1969-01-23 Mini Of Technology Pressurized machine with reciprocating piston
FR1595812A (en) * 1968-11-28 1970-06-15
DE2534001A1 (en) * 1975-07-30 1977-02-17 Paul Hammelmann High pressure plunger pump - has cylinder preloaded against pump pressure by shrinking into housing block
JPH07189889A (en) * 1993-12-27 1995-07-28 Tokimec Inc Piston type hydraulic device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 10 30 November 1995 (1995-11-30) *

Also Published As

Publication number Publication date
EP0943798A2 (en) 1999-09-22
EP0943798B1 (en) 2004-08-18

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