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WO2007033742A1 - Machine a pistons axiaux - Google Patents

Machine a pistons axiaux Download PDF

Info

Publication number
WO2007033742A1
WO2007033742A1 PCT/EP2006/008253 EP2006008253W WO2007033742A1 WO 2007033742 A1 WO2007033742 A1 WO 2007033742A1 EP 2006008253 W EP2006008253 W EP 2006008253W WO 2007033742 A1 WO2007033742 A1 WO 2007033742A1
Authority
WO
WIPO (PCT)
Prior art keywords
axial piston
piston machine
machine according
suction
cylinder
Prior art date
Application number
PCT/EP2006/008253
Other languages
German (de)
English (en)
Inventor
Jörg Dantlgraber
Original Assignee
Bosch Rexroth Ag
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 Bosch Rexroth Ag filed Critical Bosch Rexroth Ag
Publication of WO2007033742A1 publication Critical patent/WO2007033742A1/fr

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
    • F04B1/22—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 having two or more sets of cylinders or pistons
    • F04B1/24—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 having two or more sets of cylinders or pistons inclined to the main shaft axis
    • 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
    • F01B3/0035—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons
    • F01B3/0038—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons inclined to main shaft axis
    • 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
    • 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
    • F01B3/0044—Component parts, details, e.g. valves, sealings, lubrication
    • F01B3/0064—Machine housing

Definitions

  • the invention relates to an axial piston machine according to the preamble of patent claim 1 and a method for producing such an axial piston machine.
  • the axial piston machine is known for example from WO 03/058034 Al.
  • the axial piston machine has a multi-part housing for defining an interior space on which a suction port and a pressure port are formed.
  • pistons are arranged on a drive shaft, which are guided in invisible cylindrical spaces of two cylindrical drums, which are supported on a respective swash plate.
  • the cylinder chambers communicate via a suction channel integrated in the housing and a pressure channel with the suction connection or the pressure connection.
  • a disadvantage of this known solution is that pulsations of the pressure medium guided in the channels lead to vibrations of the housing and thus to disturbing noises. Furthermore, such a housing is massive, since the suction and the pressure channel are cast into the housing, resulting in high production costs.
  • Object of the present invention is to provide an axial piston machine, which shows a reduced noise during operation and manufacturing technology is easy and fast to manufacture, and a method for producing such an axial piston machine.
  • This object is achieved by an axial piston machine having the features of patent claim 1 by a method according to patent claim 9.
  • the axial piston machine has a multi-part housing for limiting an interior, in which two swash plates are accommodated, on each of which a cylinder drum is supported.
  • pistons are guided, which are in operative connection with a drive shaft, wherein the axes of rotation of the cylinder drums are employed to the axis of rotation of the piston.
  • the housing has a suction and a pressure connection, which are connected via a suction channel and a pressure channel with cylinder chambers of the cylinder drums.
  • a section of the suction or pressure channel is formed in each case by a tube inserted into the interior.
  • the housing has two covers and a central part which is arranged between the covers.
  • the connection of the lid with the central part is preferably carried out via clamping elements which are arranged outside of the interior or of the middle part.
  • the tubes are axially parallel to the axis of rotation of the drive shaft and are also clamped on the clamping elements between the lids.
  • U-shaped channel sections may be formed in the covers.
  • both the suction port and the pressure port are formed in one of the lid and each open into one of the channel sections.
  • the middle part preferably has an approximately tubular section with two diametrically arranged arcuate extensions for gripping the tubes.
  • Axial piston machine in particular of the central part, preferably a pipe is turned to its axial nominal length. Subsequently, the annular grooves are introduced into the contact surfaces and the tube deformed such that form the diametrically arranged extensions. Then the contact surfaces are reworked and the sealing rings used.
  • FIG. 1 shows a longitudinal section through an embodiment of an axial piston machine according to the invention
  • Figure 2 is a detail of the embodiment of Figure 1 and
  • FIG. 3 shows a cross section of the embodiment of Figure 1. - -
  • Figure 1 shows a longitudinal section through an axial piston machine 2 according to the invention, which can be operated both as a hydraulic motor and as a hydraulic pump.
  • the axial piston machine 2 will be described by way of example as a hydraulic pump.
  • the axial piston machine 2 has a housing 4, on which a suction port 6 and a pressure port 8 are formed, each opening into a suction or pressure channel 26, 28 according to the invention.
  • the housing 4 is formed in several parts with two lids 104, 106, between which a sleeve-like central portion 108 for limiting the interior 10 and at least two tubes 134, 136 of the Saugtial Pressure channels 26, 28 are clamped.
  • the housing 4 defines an interior 10 in which a drive shaft 12 is located. This is about a roller bearing 30 which is inserted into an inner bore 32 of the lid 106, and mounted by a rolling bearing 31 which is located in a blind bore 33 of the lid 104, two times in the housing 4.
  • the inner bore 32 is sealed by a sealing ring 34 against oil leakage.
  • a projecting from the housing 4 free end portion of the drive shaft 12 is connectable to a drive motor, not shown.
  • swash plates 14, 16 In the interior 10 are fixed two swash plates 14, 16, each with an obliquely to the axis of the drive shaft 12 extending support surface 36, 38 is arranged, on each of which a mounted on the drive shaft 12 cylinder drum 18, 20 is supported. These have each, as will be explained in more detail in Figure 2, a plurality of cylinder sleeves 40, 42, in each of which a piston 22, 24 is immersed.
  • the swash plates 14, 16 are arranged symmetrically to the vertical plane in Figure 1 center plane M.
  • a piston 22 and a piston 24 are each formed as end portions of a double piston 44, which is non-rotatably inserted in a radially projecting drive flange 46 of the drive shaft 12.
  • Each cylinder drum 18, 20 is mounted oscillatingly on the drive shaft 12 and taken by the latter via a driver 52 acting on a hub part 58 in the direction of rotation.
  • a cylinder drum with a flange 54 is supported at the respective support surface of a swash plate.
  • Each cylinder drum 18, 20 is biased against the support surface 36, 38 of a swashplate via a tension spring 60 disposed between a support ring 62 pivotable on the drive shaft 12 and a circlip 66 received in an inner circumferential groove 64 of the flange portion 54.
  • the evenly distributed over the circumference of the cylinder sleeves 40, 42 of the cylinder drum 18, 20 are supported.
  • the cylinder sleeves are each supported on the foot side via a support ring surface 70 on the annular end face 68, wherein a relief groove 72 is located in the support ring surface 70.
  • the cylinder sleeves 40, 42 each have a cylinder bore 80, in which a piston 22, 24 is immersed and the foot side is radially stepped back, so that a radially inwardly extending shoulder 82 is formed.
  • the axial securing of the cylinder sleeves 42 takes place in each case by means of a threaded insert 84, which is screwed into an internally threaded bore 86 of the flange part 54 and extends with a radially expanded flange 88 over the shoulder 82 out into the cylinder bore 80.
  • the threaded insert 84 has a bore 90 which is hydraulically connected to an aperture 92 of the flange portion 54 so that pressure fluid can flow from the cylinder space defined by the cylinder sleeve and the piston to the swash plate and in the reverse direction.
  • this control elements 94, 96, 98, 100 are formed (see Figure 1), which form part of the suction channel 26 and pressure channel 28 of the invention and on the function of the rotational position (inner, outer dead center) of the cylinder drums 18, 20th a connection with the suction or the pressure port 6, 8 is made to lead pressure medium to the cylinder chamber or to direct high pressure pressurized fluid to a consumer.
  • the pistons 22, 24 are designed approximately conical, with their diameter from a waist 101 (see Figure 2) starting to expand conically acting as a seal between the piston and cylinder sleeve ball element.
  • the lids 104, 106 are substantially plate-like, with the suction connection 6 and the pressure connection 8 being formed in the right-hand cover 106 in FIG. 1, in which the bearing arrangement 30 for supporting the drive shaft 12 is arranged. each in one of the channel sections 138, 142 open. This has the advantage that the left in accordance with the view in Figure 1 cover 104 is formed axially shortened and the construction volume of the axial piston machine 2 is reduced in the axial direction.
  • the middle part 108 has two frontal contact surfaces 110, 112 with which it abuts on opposite end surfaces 111, 113 of the cover 104, 106, whereby the inner space 10 is limited in the axial and radial directions.
  • the center part 108 has two sealing rings 118, 120 which are inserted into an annular groove 114, 116 of the contact surface 110, 112 and bear sealingly against the end faces 111, 113.
  • the middle part 108 has, according to FIG. 3, an approximately tubular or annular cross-section which is suitable for receiving tubes 134, 136 according to the invention of the suction or the like.
  • Pressure channel 26, 28 two diametrically arranged arcuate extensions 130, 132 for engaging around the tubes 134, 136 has.
  • a tube is preferably turned to its axial nominal length, and the annular grooves 114, 116 are introduced into the contact surfaces 110, 112. Subsequently, the tube is deformed accordingly, so that the diametrically arranged extensions 130, 132 form. Then, the contact surfaces 110, 112 are reworked and the sealing rings 118, 120 used.
  • the tubes 134, 136 extend according to Figure 1 axially parallel to the axis of rotation of the drive shaft 12 and are preferably made of steel or a high pressure resistant plastic. They are received in the interior space 10 and radially spaced from an inner peripheral wall of the central portion 108, so that vibrations introduced thereto, for example due to pulsation in the pressure medium, are not transmitted to the housing 4 and thus quiet operation the axial piston machine 2 according to the invention is possible.
  • the tubes 134; 136 are clamped between the cover 104, 106 and dive end into a stepped extension of the channel sections 138, 140, 142, 144 a.
  • a sealing ring 162, 164, 166, 168 is inserted into each radial extension, which surrounds the tubes 134, 136 in the region of their end sections.
  • the axial height of the sealing rings 162, 164, 166, 168 corresponds to the axial depth of the extensions, so that the sealing rings 162, 164, 166, 168 are flush with the end faces 111, 113.
  • an axial piston machine with a multi-part housing for defining an interior, in which two swash plates are accommodated, on each of which a cylinder drum is supported, and with a suction and a pressure port, which is connected via a suction or pressure channel with cylinder chambers of the cylinder drum are, wherein a portion of the suction or pressure channel is formed in each case by a tube inserted into the interior, and a method for producing such an axial piston machine.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)

Abstract

L'invention concerne une machine à pistons axiaux comprenant : un logement constitué de plusieurs parties, servant à délimiter une chambre interne dans laquelle sont disposés deux plateaux oscillants contre lesquels s'appuie respectivement un tambour cylindrique, et ; un raccord d'aspiration et de refoulement qui sont reliés avec des chambres cylindriques du tambour cylindrique, par l'intermédiaire d'un canal d'aspiration ou de refoulement. Selon l'invention, une section du canal d'aspiration ou de refoulement est respectivement formée par un tuyau placé dans ladite chambre interne. La présente invention se rapporte en outre à un procédé pour produire ladite machine à pistons axiaux.
PCT/EP2006/008253 2005-09-16 2006-08-23 Machine a pistons axiaux WO2007033742A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200510044386 DE102005044386A1 (de) 2005-09-16 2005-09-16 Axialkolbenmaschine
DE102005044386.9 2005-09-16

Publications (1)

Publication Number Publication Date
WO2007033742A1 true WO2007033742A1 (fr) 2007-03-29

Family

ID=37440725

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/008253 WO2007033742A1 (fr) 2005-09-16 2006-08-23 Machine a pistons axiaux

Country Status (2)

Country Link
DE (1) DE102005044386A1 (fr)
WO (1) WO2007033742A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010054415A1 (de) 2010-12-14 2012-06-14 Robert Bosch Gmbh Hydrostatische Pumpenanordnung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL284788A (fr) *
US3291068A (en) * 1956-05-29 1966-12-13 Reiners Walter Hydraulic axial-piston machine
WO2003058035A1 (fr) * 2002-01-12 2003-07-17 Innas B.V. Dispositif hydraulique

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL284788A (fr) *
US3291068A (en) * 1956-05-29 1966-12-13 Reiners Walter Hydraulic axial-piston machine
WO2003058035A1 (fr) * 2002-01-12 2003-07-17 Innas B.V. Dispositif hydraulique

Also Published As

Publication number Publication date
DE102005044386A1 (de) 2007-03-22

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122 Ep: pct application non-entry in european phase

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