WO2006005399A1 - Machine a pistons axiaux pourvue d'une couche resistant a l'usure - Google Patents

Machine a pistons axiaux pourvue d'une couche resistant a l'usure Download PDF

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Publication number
WO2006005399A1
WO2006005399A1 PCT/EP2005/006156 EP2005006156W WO2006005399A1 WO 2006005399 A1 WO2006005399 A1 WO 2006005399A1 EP 2005006156 W EP2005006156 W EP 2005006156W WO 2006005399 A1 WO2006005399 A1 WO 2006005399A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
axial piston
piston machine
sliding side
control plate
Prior art date
Application number
PCT/EP2005/006156
Other languages
German (de)
English (en)
Inventor
Georg Jacobs
Herbert Kurz
Bernd Emrich
Sascha Henke
Alexander Schattke
Thomas Beck
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
Priority to US11/632,094 priority Critical patent/US20100000401A1/en
Priority to EP05761738A priority patent/EP1769157A1/fr
Publication of WO2006005399A1 publication Critical patent/WO2006005399A1/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
    • F04B1/2014—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
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2203/00—Non-metallic inorganic materials
    • F05C2203/08—Ceramics; Oxides
    • F05C2203/0804—Non-oxide ceramics
    • F05C2203/0808—Carbon, e.g. graphite
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2253/00—Other material characteristics; Treatment of material
    • F05C2253/12—Coating

Definitions

  • DE 102 23 844 A1 describes an axial piston machine with a control plate and a cylinder drum sliding on the control plate. On the paired, mutually rubbing surfaces, a plastic layer is arranged on one side and a carbon-containing layer on the other side.
  • the areas of the facing surfaces of the control plate and the cylinder drum are subjected to increased loads. This includes the notches normally present to avoid rapid pressure fluctuations at the control ports of the control plate.
  • the mutually facing surfaces are also claimed by a falling back of the cylinder drum or the pressure plate on the control plate.
  • the axial piston machine according to the invention with the features of claim 1 has the advantage of increased wear resistance, in particular against beating loads of successive sliding parts, against cavitation and against the biaxial load.
  • the axial piston machine according to the invention is easier to manufacture and can be operated except with water with oil-containing fluids.
  • the measures carried out in the dependent claims relate to advantageous developments of the axial piston according to the invention.
  • the other, not coated with the layer sliding side consists of hardened by nitriding steel.
  • the carbon layer opposite sliding side can be made simplified.
  • the use of environmentally harmful non-ferrous metals can be dispensed with.
  • control plate and / or the cylinder drum essentially consist of metal in the region of its sliding sides and the layer is applied directly on the metal surface of the sliding sides.
  • the layer adheres more consistently to the respective sliding side.
  • the functional layer can be applied either directly or preferably by mediation of an adhesive layer.
  • the layer is a diamond-like amorphous carbon layer, in particular a tetrahedral hydrogen-free amorphous carbon layer, ta-C.
  • the ta-C layer has excellent advantageous properties over conventional carbon layers used in an axial piston machine.
  • the fatigue resistance of the friction and wear-reducing layer is significantly increased in particular against adhesive flaking and cohesive removal, in particular with regard to the burden of cavitation and impact forces, which occur especially at elevated working pressure and fast, heavy load changes.
  • the wear resistance, especially at elevated load and dirty fluids is improved.
  • FIG. 1 is a schematic representation of an axial piston according to the invention
  • FIG. 2 shows the detail II shown in Fig. 1 in an enlarged form
  • Fig. 3 shows a preferred embodiment of a control plate of the invention
  • Axial piston machine in a plan view of the sliding side of the control plate
  • Fig. 4 shows a preferred embodiment of a cylinder drum of the invention
  • the axial piston machine shown in Fig. 1 is in swash plate design with adjustable
  • Displacement volume and a flow direction includes in a known manner as essential components a hollow cylindrical housing 1 with a frontally open
  • Control mirror is called a drive shaft 5 and a
  • the swash plate 3 is formed as a so-called pivoting cradle with a semi-cylindrical cross-section and is supported by two bearing surfaces extending at a mutual distance parallel to the pivoting direction hydrostatic relief on two correspondingly shaped bearing shells 8, which are fixed to the inner surface of the connecting plate 2 opposite housing end wall 9.
  • the hydrostatic discharge takes place in a known manner via pressure pockets 10 which are formed in the bearing shells 8 and are supplied via connections 11 with pressure medium.
  • An accommodated in a bulge of a cylindrical housing wall 12 adjusting device 13 engages over an extending in the direction of the terminal plate 2 arm 14 on the swash plate 3 and serves to pivot the same about a pivot axis perpendicular to the pivot axis.
  • the remaining bore portion is formed with a conical shape. It tapers from its cross section of greatest diameter near the first bore section to its cross section of smallest diameter near the abutting on the control plate 4 end or bearing surface of the cylinder drum 6.
  • the defined by the drive shaft 5 and this conical bore portion annular space is denoted by the reference numeral 25 denotes.
  • Each slide shoe 31 is provided on its sliding surface 32 facing the sliding surface, each with a pressure pocket, not shown, which via a through hole 33 in the shoe 31 to a stepped axial Through passage 34 is connected in the piston 29 and connected in this way with the delimited by the piston 29 in the cylinder bore 26 working space of the cylinder.
  • a throttle is formed in the region of the associated ball head 30.
  • An axially displaceable means of the spline connection 24 arranged on the drive shaft 5 and acted upon by a spring 35 in the direction of the swash plate 3 hold-down device 36 holds the sliding blocks 31 in abutment against the sliding disk 32nd
  • the axial piston machine 1 is provided for operation with oil as the pumped medium.
  • the cylinder drum 6 is rotated together with the piston 29 in rotation.
  • the swashplate 3 is pivoted into an inclined position relative to the cylinder drum 6 by actuation of the adjusting device 13, all pistons 29 perform lifting movements.
  • each piston 29 passes through a suction and a compression stroke, with corresponding oil flows are generated, the supply and discharge via the MündungskanäIe 27, the control slots 15 and the pressure and suction channel 16D, 16S done.
  • Fig. 2 shows the detail II shown in Fig. 1 in an enlarged form, whereby the area around the layer 46, the control plate 4 and the cylinder barrel 6, as well as around the first sliding side 44, the second sliding side 45 and the opening 15 thereby enlarged is.
  • the layer 46 is arranged on the first sliding side 44, that is to say on the control plate 4.
  • the layer 46 preferably consists of a tetrahedral hydrogen-free amorphous diamond-like carbon, which is known by the abbreviation ta-C from the group of DLC layers (Diamond Like Carbon layers).
  • the layer 46 opposite the second sliding side 45 of the likewise completely made of steel cylinder drum 6 is preferably hardened by nitriding.
  • the rotational movement between the layer 46 and the second sliding side 45 forms a hydrodynamic sliding film, which is formed by the conveying medium.
  • the layer rubs 46 on the second sliding layer 45. Due to the hydraulic pressure fluctuations occurring in the axial piston 1, especially when the axial piston is very stressed, the second sliding side 45 abruptly fall back on the layer 46 again. This creates a beating load which depends in particular on the working pressures and the pressure fluctuation curve in terms of their strength.
  • not shown notches may be arranged on the opposite direction of rotation end or holes in the control plate 4 introduced, according to the invention thereby also the surface of these not shown notches and the inner surfaces of the holes, not shown would be coated with the layer 46.
  • Material loads due to cavitation preferably occur in axial piston machines in a region 48, which is exemplified by a circular ring.
  • the invention is not limited to the embodiments and embodiments.
  • the features of the embodiment and the embodiments may be combined with each other in any manner.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

Machine (1) à pistons axiaux qui comporte une plaque de commande (4) et un tambour cylindrique (6) rotatif pour rapport à la plaque de commande (4). Une première face de glissement (44) de la plaque de commande (4) frotte ou glisse contre une seconde face de glissement (45) du tambour cylindrique (6). L'une des faces de glissement (44, 45) possède une couche (46) contenant du carbone.
PCT/EP2005/006156 2004-07-09 2005-06-08 Machine a pistons axiaux pourvue d'une couche resistant a l'usure WO2006005399A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US11/632,094 US20100000401A1 (en) 2004-07-09 2005-06-08 Axial-piston machine having an antiwear layer
EP05761738A EP1769157A1 (fr) 2004-07-09 2005-06-08 Machine a pistons axiaux pourvue d'une couche resistant a l'usure

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004033321.1 2004-07-09
DE102004033321A DE102004033321B4 (de) 2004-07-09 2004-07-09 Axialkolbenmaschine mit Verschleißschutzschicht

Publications (1)

Publication Number Publication Date
WO2006005399A1 true WO2006005399A1 (fr) 2006-01-19

Family

ID=34972701

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2005/006156 WO2006005399A1 (fr) 2004-07-09 2005-06-08 Machine a pistons axiaux pourvue d'une couche resistant a l'usure

Country Status (5)

Country Link
US (1) US20100000401A1 (fr)
EP (1) EP1769157A1 (fr)
CN (1) CN101002019A (fr)
DE (1) DE102004033321B4 (fr)
WO (1) WO2006005399A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006039719A1 (de) 2006-08-24 2008-02-28 Sms Demag Ag Breitseitenplatte einer Kokille
DE102008060067B4 (de) 2008-12-02 2017-11-02 Robert Bosch Gmbh Axialkolbenmaschine mit einer Steuerplatte, die in einem Teilbereich des äußeren Dichtstegs eine erhöhte Elastizität aufweist
DE102008060491A1 (de) 2008-12-04 2010-06-10 Robert Bosch Gmbh Axialkolbenmaschine und Steuerplatte mit Verschleißschutzschicht
JP5425722B2 (ja) * 2010-06-23 2014-02-26 日立建機株式会社 斜軸式液圧回転機
JP2013533418A (ja) * 2010-06-23 2013-08-22 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング アキシャルピストン機械
DE102012104923A1 (de) * 2012-06-06 2013-12-12 Linde Hydraulics Gmbh & Co. Kg Hydrostatische Verdrängermaschine
JP6276911B2 (ja) * 2012-08-13 2018-02-07 Ｋｙｂ株式会社 液圧回転機
JP5920645B2 (ja) * 2013-02-21 2016-05-18 ヴラディミル フジョドロヴィッチ フォミン エネルギー回収アキシャルプランジャポンプ
DE102014223564A1 (de) 2014-11-19 2016-05-19 Robert Bosch Gmbh Hydrostatische Axialkolbenmaschine
DE102015200310A1 (de) * 2015-01-13 2016-07-14 Robert Bosch Gmbh Kolbeneinheit und hydrostatische Radialkolbenmaschine
DE102015107343A1 (de) * 2015-05-11 2016-11-17 Linde Hydraulics Gmbh & Co. Kg Hydrostatische Axialkolbenmaschine in Schrägachsenbauweise

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DE1963769A1 (de) * 1969-12-19 1971-06-24 Rauch Fa Constantin Zylindertrommel-Steuerplattenkombination fuer Axialkolbenmaschinen
DE1653529A1 (de) * 1967-09-26 1973-11-15 Lucas Industries Ltd Schlitzplatte fuer hydraulische pumpen oder motoren
DE4424671A1 (de) * 1994-07-13 1996-01-18 Danfoss As Steuerspiegel einer hydraulischen Maschine
DE10223844A1 (de) * 2002-05-28 2003-12-18 Danfoss As Wasserhydraulische Maschine

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US3460483A (en) * 1967-09-15 1969-08-12 Lucas Industries Ltd Port plates for hydraulic reciprocating pumps and motors
US4117770A (en) * 1976-05-13 1978-10-03 Gennady Petrovich Koshelenko Axial-piston hydraulic machine
DE2812417C2 (de) * 1978-03-22 1985-05-23 Linde Ag, 6200 Wiesbaden Zylindertrommel für eine hydrostatische Kolbenmaschine und Verfahren zu deren Herstellung
DE4301133C2 (de) * 1993-01-18 1995-05-18 Danfoss As Hydraulische Kolbenmaschine
DE4301134C2 (de) * 1993-01-18 1995-05-18 Danfoss As Hydraulische Axialkolbenmaschine
DE4417011C2 (de) * 1994-05-13 1996-11-28 Danfoss As Hydraulische Kolbenmaschine
DE4442556C2 (de) * 1994-11-30 1999-05-27 Danfoss As Hydraulische Axialkolbenmaschine
US5961218A (en) * 1996-02-20 1999-10-05 Ebara Corporation Water lubricated machine component having contacting sliding surfaces
RU2114210C1 (ru) * 1997-05-30 1998-06-27 Валерий Павлович Гончаренко Способ формирования углеродного алмазоподобного покрытия в вакууме
DE19858483A1 (de) * 1998-12-18 2000-08-31 Mannesmann Rexroth Ag Hydraulische Verdrängermaschine, insbesondere Verdrängerpumpe
JP2002031040A (ja) * 2000-07-12 2002-01-31 Kayaba Ind Co Ltd 液圧ピストンポンプ・モータ摺動部の表面処理構造
US6880449B1 (en) * 2001-03-30 2005-04-19 Hydro-Gear Limited Partnership Center section and running components for hydrostatic unit and method of manufacture
WO2003016717A1 (fr) * 2001-08-13 2003-02-27 Thomas Industries Inc. Pompe a pistons oscillants avec cylindres en carbone graphite
JP3999568B2 (ja) * 2002-05-24 2007-10-31 三菱重工業株式会社 表面処理ピストンを備えた流体機械
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DE1653529A1 (de) * 1967-09-26 1973-11-15 Lucas Industries Ltd Schlitzplatte fuer hydraulische pumpen oder motoren
DE1963769A1 (de) * 1969-12-19 1971-06-24 Rauch Fa Constantin Zylindertrommel-Steuerplattenkombination fuer Axialkolbenmaschinen
DE4424671A1 (de) * 1994-07-13 1996-01-18 Danfoss As Steuerspiegel einer hydraulischen Maschine
DE10223844A1 (de) * 2002-05-28 2003-12-18 Danfoss As Wasserhydraulische Maschine

Also Published As

Publication number Publication date
CN101002019A (zh) 2007-07-18
DE102004033321A1 (de) 2006-02-02
EP1769157A1 (fr) 2007-04-04
DE102004033321B4 (de) 2006-03-30
US20100000401A1 (en) 2010-01-07

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