WO2010115401A1 - Machine hydraulique à pistons axiaux munie d'une plaque de raccordement - Google Patents

Machine hydraulique à pistons axiaux munie d'une plaque de raccordement Download PDF

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Publication number
WO2010115401A1
WO2010115401A1 PCT/DE2010/000356 DE2010000356W WO2010115401A1 WO 2010115401 A1 WO2010115401 A1 WO 2010115401A1 DE 2010000356 W DE2010000356 W DE 2010000356W WO 2010115401 A1 WO2010115401 A1 WO 2010115401A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure chamber
piston machine
connection plate
axial piston
base material
Prior art date
Application number
PCT/DE2010/000356
Other languages
German (de)
English (en)
Inventor
Josef Beck
Christian Spielvogel
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
Publication of WO2010115401A1 publication Critical patent/WO2010115401A1/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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
    • F03C1/061—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
    • F03C1/0623—Details, component parts
    • F03C1/0628—Casings, housings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
    • F03C1/0636—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F03C1/0644—Component parts
    • F03C1/0663—Casings, 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
    • F04B1/14—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 stationary cylinders
    • F04B1/141—Details or component parts
    • F04B1/145—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
    • F04B1/2064—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
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/125—Cylinder heads
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/007—Cylinder heads

Definitions

  • the invention relates to a hydraulic axial piston machine which can be designed as a hydraulic pump or as a hydraulic motor and which has a connection plate which has a high-pressure chamber and a low-pressure chamber and are provided in the openings, via which the high-pressure chamber and the low-pressure chamber with by the stroke of axial piston can be fluidly connected in their volume variable work spaces.
  • connection plate is cut from a previously manufactured extruded profile to connection plate blanks and then further processed.
  • the strand blank is made of aluminum, iron or copper or of an alloy with at least one of these metals. It is known that aluminum and / or copper alloys have only a reduced compressive strength compared to iron and steel alloys, so that connection plates made of aluminum or copper or their alloys are only suitable for axial piston machines with limited fluid pressure.
  • the known terminal plate has the disadvantage that it is produced by a relatively expensive process, since only the outer profile is given by the continuous casting, while the inner structure of the connection plate with high and low pressure chamber and corresponding openings to those in a drum with rotating axial piston is relatively expensive to produce machining operations. Due to the high strength, which can be achieved with cast iron, and due to the possibility at the same time to produce the relatively complex internal structure of the connection plate in mass production during casting, with only sealing grooves and bearing shell seats are machined machined, the use of cast iron despite his high weight enforced for such axial piston machines in the prior art and in mass production.
  • the object of the invention is to make a hydraulic axial piston machine with the features of the preamble of claim 1 so that they can be operated at high pressures and still offers advantages in terms of weight and cost over known axial piston machines.
  • an axial piston machine with a connecting plate which has a high-pressure chamber and a low-pressure chamber in which openings are provided, via which the high-pressure chamber and the low-pressure chamber can be fluidically connected to working chambers that can be varied by the stroke of axial pistons, and which are used for material Reinforcing at least one fitted reinforcing element whose material has a higher strength than a base material.
  • Such axial piston machine with a connection plate of a base material with a lower strength than the reinforcing elements has the advantage that preferably aluminum die-cast alloys are now available for significantly higher nominal can be used as previously possible in the prior art.
  • such an axial piston machine has the advantage that at least the connection plate can be manufactured in sufficiently high quantities and machined reworking kept within limits, since it is possible through the aluminum die-casting to achieve an inexpensive mass production of the complex structure of the connection plate with considerable weight advantages ,
  • the limits in the use of aluminum die cast alloys and other materials that do not reach the high strength values of cast iron materials as base material for an axial piston machine, can now be overcome because of the reinforcing element according to the invention.
  • the reinforcing element is integrated in critical tensile load areas of the connection plate, so that the connection plate can withstand significantly higher loads for the surfaces subjected to the fluid pressure.
  • any possibility of increasing the strength in the pressure-loaded areas without changing the base material itself increases the application possibilities for such aluminum die-cast alloys or similar materials, in particular for the connecting plates of axial piston machines.
  • the strength is increased by bracing the component, in particular the connection plate, by one or more rings in the critical zones of the connection plate.
  • This ring or these rings induce compressive stresses in the particularly critical areas of the openings of the connection plate to the working spaces, especially since these openings are preferably formed kidney-shaped.
  • the bias in such reinforcing rings by pressing and / or by shrinking be achieved.
  • a supporting effect can be achieved by an outer ring, but the same is possible with an inner ring which induces stresses radially outward.
  • the inner ring and a bearing ring of the rolling bearing of the input or output shaft of the machine can be used.
  • the fitted reinforcing element is one of the openings of high and low
  • I pressure space comprehensive reinforcing ring which is shrunk into an outer annular groove of the connection plate radially outside the range of openings of high and low pressure space and exerts compressive stresses on the base material with its radially inner annular surface.
  • an outer annular groove is machined radially outside the openings only in a blank of a die-cast connection plate made of an aluminum or other alloys, and then the reinforcing ring is shrunk into the annular groove.
  • the radially inner annular surface of the reinforcing ring exerts compressive stresses on the base material and counteract tensile stresses due to the pressure in the region of the opening to the high pressure space of the connection plate.
  • the fitted reinforcing element is a reinforcing ring supporting the high and low pressure spaces inside, which is pressed into the connecting plate radially inside the openings and with its radially outer annular surface stresses on the base material in the direction of radially outwardly disposed openings exerts.
  • the tolerances for the reinforcing ring is selected so that when pressed in, the radially outer annular surface of the reinforcing ring exerts pressure on the base material in the direction of the region of the openings of the connection plate.
  • the reinforcing ring radially within the openings is an outer bearing ring of a rolling bearing of the axial piston machine which supports the shaft.
  • this roller bearing is fixed in the connection plate, wherein the outer bearing ring with its radially outer annular surface stresses on the base material of the connection plate radially outwardly exerts.
  • only the tolerances between the radially outer annular surface of the outer bearing ring and the central recess in the connection plate, which receives the rolling bearing must be chosen so that a press-fit and thus a press fit of the bearing ring is ensured in the connection plate.
  • connection plate preferably have a kidney shape and are therefore particularly at risk under high pressurization / a connecting plate of die-cast aluminum alloy.
  • the reinforcing rings provided in accordance with the invention can be adapted in an almost ideal manner to such lower-shaped openings in the connecting plate.
  • the fitted reinforcing element is a lining of the high-pressure chamber with the associated opening of the connection plate.
  • the lining of the high-pressure space made of a material having a higher strength than the surrounding base material, the disadvantage of the reduced strength of the base material can be compensated because the lining of the high pressure absorbs applied tensile stresses to a high degree.
  • Such a lining can be prefabricated as a component and arranged as a core in the die casting process in the die casting mold, so that an intimate cohesive connection between the base material and the lining material is created.
  • the prefabricated lining can also be integrated into the high-pressure chamber by gluing, soldering or welding. Further, it is possible to be deposited by appropriate PVD or CVD (physical or chemical vapor deposition) method on the base material in the region of the high-pressure chamber and the opening to the high-pressure chamber.
  • an alloy steel such as a chromium-nickel steel alloy or a spring steel alloy is preferably provided.
  • special aluminum bronze alloys of high strength can be used here as the material of the fitted reinforcing element. It is possible to provide the axial piston machine as hydromechani- see pump and / or as hydromechani Intelligent engine.
  • Another practical idea is to encase the steel part (melting point about 1100 0 C) which forms the reinforcing element with the aluminum plate (melting point about 550 0 C);
  • FIG. 1 shows a plan view of the inside of a connection plate of an axial piston machine according to a first
  • FIG. 3 is a plan view of the inside of a connection plate of an axial piston machine according to a second embodiment
  • FIG. 5 shows a plan view of the inside of a connecting plate of an axial piston machine according to a third exemplary embodiment
  • FIG. 6 shows a section along the line VI-VI from FIG. 5,
  • FIG. 7 shows a longitudinal section through a swash plate axial piston pump with a connection plate similar to that of Figures 3 and 4 and
  • FIG. 8 shows a plan view of the outside of the connection plate from FIG. 7.
  • the axial piston machine 4, according to the figures 7 and 8 is a swash plate machine and has a cup-shaped housing 25, on whose bottom portion 29 a swash plate 11 is pivotally mounted.
  • An opening 30 of the housing * is sealed off by a connection plate 7, wherein the connection plate 7 has a high pressure chamber 9 and a low pressure chamber 10 has and a first rolling bearing 21 a drive shaft 24 carries.
  • a second roller bearing 26 is arranged in the Bqden Siemens 29 of the housing 25.
  • On the drive shaft 24 of a hydraulic pump or output shaft of a hydraulic motor rotatably a drum 8 is arranged, which rotates with respect to the connecting plate 7 with the shaft 24.
  • cylindrical bores 31 are provided, in which axial piston 5, which are supported on the swash plate 11, exert strokes and thereby a fluid on a not-apparent kidney-shaped breakthrough in a control disk 12 and one apparent in Figures 1 to 6 Press opening 27 of the connection plate 7 in the high-pressure chamber 9 and suck from the low-pressure chamber 10 via an apparent in Figures 1 to 6 opening 28 in the connection plate 7 and a likewise not further apparent further kidney-shaped opening in the control disk 12. If such an axial piston machine is operated as a pump, pressure medium is sucked in via the low-pressure space and displaced into the high-pressure space. When operating as
  • the Machine can also be designed so that, depending on the mode of operation, one pressure chamber is the high-pressure chamber and the other pressure chamber is the low-pressure chamber.
  • Such axial piston machines which are also referred to as axial piston machines, can be operated at high pressure of a few 100 bar or a few 10 MPa (megapascal), depending on the strength of the base material 16 of the relatively planar connection plate 7 on the pressure side in the high-pressure space 9.
  • Axial piston machines with axial piston and connection plate therefore usually have a connection plate made of cast iron on.
  • connection plates made of a cast iron material in mass production can reach a nominal pressure well above 200 bar or well above 20 MPa.
  • Axial piston machines with parts, for example, a connection plate made of an aluminum die cast alloy, however, which would give a significant weight and cost advantage over cast iron material, are usually only at a nominal pressure below 200 bar or below 20 MPa used.
  • connection plate of an axial piston machine is now predominantly made of a base material whose strength does not match that of cast iron, and reinforced in areas susceptible to breakage or cracking.
  • connection plate 7 according to Figures 1 and 2 is placed according to the overall section of Figure 7 on a cup-shaped housing 25 of an axial piston machine.
  • the connection plate 7 has a flange 36 with bores 37, 38, 39 and 40 and an annular sealing groove 41, which seals the connection plate 7 with respect to the housing 25 shown in FIG. 7 in a pressure-tight manner.
  • the transition between the working chambers delimited by the axial pistons arranged in the drum and the kidney-shaped openings in the control disk to the high-pressure chamber 9 forms a kidney-shaped opening 27 and to the low-pressure chamber 10 a kidney-shaped opening 28 of the connecting plate 7.
  • the base material 16 of the connecting plate 7 is highly loaded, so that connecting plates made of die-cast aluminum or cast aluminum or copper alloy as described above, which could bring significant weight savings, only one print of less than 200 bar or 20 MPa can withstand.
  • connection plate 7 shown in Figures 1 and 2 on its underside 35 by corresponding reinforcing elements reinforced material whose strength is well above the strength of the base material 16, which is for example aluminum die-cast.
  • a first reinforcing element forms a reinforcing ring 13, which is inserted into an annular groove 14 which rotates outside the kidney-shaped openings 27 and 28.
  • the reinforcing ring 13 is clamped with its inner annular surface 15 relative to the base material 16 such that it exerts compressive stresses on the base material 16, which compensate for the tensile stresses in the region of the opening 27 to the high-pressure chamber 9.
  • a second reinforcing element is also used, which forms a reinforcing ring 17 which is inserted into a central recess 18 radially within the kidney-shaped openings 27 and 28 and with its outer annular surface 19 a pressure on the base material 16 in the region of Openings 27 and 28 exercises.
  • the connection plate 7 withstands a significantly higher pressure than it would if it were made entirely of aluminum die-cast or extruded aluminum, for example.
  • a reinforcing ring 13 and / or a reinforcing ring 17 ensures that, despite the use of base material 16 of conventional and known die-cast or extruded aluminum or copper alloys, it is possible to operate an axial piston machine at very high pressure.
  • a die-casting process a plurality of terminal plates 7 can be manufactured,. which make only a small post-processing required, such as the smoothing or introduction of the annular grooves and a smoothing of the bottom 35 and the top 42 of the terminal plate. 7
  • an outer bearing ring 20 of a roller bearing 21 already described in connection with the figure 7 is formed as a reinforcing ring radially inside the kidney-shaped openings 27 and 28, so that no corresponding special reinforcing ring is to be prepared. Rather, the rolling bearing 21 arranged in a plurality of axial piston machines in the connection plate 7 is used to introduce a tension into the base material 16 in the direction of the opening 27 to the high-pressure chamber 9 with the aid of the pressed-in outer bearing ring 20.
  • the base material 16 is further reinforced as in the embodiment of Figures 1 and 2 of a reinforcing ring 13 in a radially outwardly of the openings 27 and 28 encircling annular groove 14 with the inner annular surface 15 compressive stresses on the areas of the openings for high and Low pressure space 9 and 10 exercises.
  • the embodiment according to Figures 5 and 6 differs from the preceding in that in the high-pressure chamber
  • connection plate 7 in the region of the opening 27 of the connection plate 7 a lining 22 is used whose material has a higher strength than the base material 16 of the connection plate 7. It should be noted that in the connection plate according to FIGS. 5 and 6 also in the connection plates according to the other embodiments of the high pressure chamber 9, the high pressure port and the high pressure chamber
  • the liner 22 allows for significantly higher pressure than, for example, a mere aluminum die-cast plate allows.
  • the lining 22 can be prefabricated and used as a core element, similar to a mold, in die casting, so that an intensive cohesive connection is created during the die-casting process between the lining 22 and the base material 16.
  • this lining it is also possible to introduce this lining by means of coating processes in the pressurized area of the high-pressure chamber 9 and the opening 27.
  • the prefabricated lining 22 can also be glued, soldered or diffusion soldered into a connecting plate 7 formed by die casting.
  • both pressure chambers are provided with a lining 22.
  • the pressure chambers are then usually the same size. You can then design so that the same liner can be used for both pressure chambers.
  • the material of the embedded reinforcing elements 13, 17 and 22 is preferably a stainless steel alloy, in particular a chromium-nickel steel alloy. It can be a spring steel alloy in general. It is conceivable as a material and a Aluminiumbronzeleg réelle.
  • the outer bearing ring of a roller bearing is used as the one reinforcing ring, then this is usually already made of a material, for example of a stainless steel, which is capable of reinforcing the connection plate.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Reciprocating Pumps (AREA)

Abstract

L'invention concerne une machine hydraulique à pistons axiaux munie d'une plaque de raccordement. Les pistons axiaux effectuent des mouvements de levée, par rapport à la plaque de raccordement fixée au boîtier, dans un tambour rotatif par rapport à la plaque de raccordement. La plaque de raccordement présente une chambre haute pression et une chambre basse pression. La chambre haute pression et la chambre basse pression communiquent avec des chambres de travail délimitées de manière variable par les pistons axiaux, par l'intermédiaire d'ouvertures ménagées dans la plaque de raccordement. La plaque de raccordement présente, pour le renforcement du matériau, au moins un élément de renforcement adapté, dont le matériau présente une résistance supérieure à celle d'un matériau de base de la plaque de raccordement.
PCT/DE2010/000356 2009-04-09 2010-03-26 Machine hydraulique à pistons axiaux munie d'une plaque de raccordement WO2010115401A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009017159 2009-04-09
DE102009017159.2 2009-04-09

Publications (1)

Publication Number Publication Date
WO2010115401A1 true WO2010115401A1 (fr) 2010-10-14

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ID=42289814

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2010/000356 WO2010115401A1 (fr) 2009-04-09 2010-03-26 Machine hydraulique à pistons axiaux munie d'une plaque de raccordement

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DE (1) DE102010013008A1 (fr)
WO (1) WO2010115401A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012016068B4 (de) * 2012-08-14 2023-07-20 Robert Bosch Gmbh Anschlussvorrichtung für hydrostatische Maschine und hydrostatische Maschine
DE102017203281A1 (de) 2017-03-01 2018-09-06 Robert Bosch Gmbh Anschlussplatte, Hydromaschine mit Anschlussplatte, sowie hydrostatische Einheit mit Hydromaschine und hydraulischem Anbauteil

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5215443A (en) * 1990-09-28 1993-06-01 Speck-Kolbenpumpenfabrik Otto Speck Gmbh & Co. Kg High pressure liquid pump
DE10349318A1 (de) * 2003-10-23 2005-05-25 Brueninghaus Hydromatik Gmbh Anschlußplatte einer hydrostatischen Maschine und Verfahren zur Herstellung der Anschlußplatte
US20050207908A1 (en) * 2002-05-14 2005-09-22 Paul Wuetherich Radial piston pump for fuel injection system having improved high-pressure resistance

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5215443A (en) * 1990-09-28 1993-06-01 Speck-Kolbenpumpenfabrik Otto Speck Gmbh & Co. Kg High pressure liquid pump
US20050207908A1 (en) * 2002-05-14 2005-09-22 Paul Wuetherich Radial piston pump for fuel injection system having improved high-pressure resistance
DE10349318A1 (de) * 2003-10-23 2005-05-25 Brueninghaus Hydromatik Gmbh Anschlußplatte einer hydrostatischen Maschine und Verfahren zur Herstellung der Anschlußplatte

Also Published As

Publication number Publication date
DE102010013008A1 (de) 2010-10-14

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