EP3309392B1 - Procédé de fabrication d'un sabot oscillant d'une machine volumétrique hydrostatique - Google Patents

Procédé de fabrication d'un sabot oscillant d'une machine volumétrique hydrostatique Download PDF

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Publication number
EP3309392B1
EP3309392B1 EP17193761.8A EP17193761A EP3309392B1 EP 3309392 B1 EP3309392 B1 EP 3309392B1 EP 17193761 A EP17193761 A EP 17193761A EP 3309392 B1 EP3309392 B1 EP 3309392B1
Authority
EP
European Patent Office
Prior art keywords
sliding shoe
component
sliding
ball joint
piston
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.)
Active
Application number
EP17193761.8A
Other languages
German (de)
English (en)
Other versions
EP3309392A1 (fr
Inventor
Lukas Krittian
Thomas LÖFFLER
Rolf Lasaar
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.)
Linde Hydraulics GmbH and Co KG
Original Assignee
Linde Hydraulics GmbH and Co KG
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Publication of EP3309392A1 publication Critical patent/EP3309392A1/fr
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Publication of EP3309392B1 publication Critical patent/EP3309392B1/fr
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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
    • F04B1/2035—Cylinder barrels
    • 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
    • F04B1/122—Details or component parts, e.g. valves, sealings or lubrication means
    • F04B1/124—Pistons
    • F04B1/126—Piston shoe retaining means
    • 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

Definitions

  • the invention relates to a method for producing a sliding shoe of a hydrostatic displacement machine, in particular an axial piston machine, which can be articulated to a pressurized piston and supports the piston on a stroke-generating running surface, the sliding shoe consisting of a ball joint head with which the sliding shoe is articulated to the piston is, a sliding shoe plate with which the sliding shoe is supported on the running surface, and a sliding shoe neck, which is formed between the ball joint head and the sliding shoe plate.
  • Hydrostatic displacement machines in particular axial piston machines, have a sliding bearing point in the region of the support of the pistons on a running surface that generates a stroke.
  • the pistons are supported on a running surface that generates a stroke using sliding shoes as support elements.
  • the sliding shoes are each articulated to the pressurized piston by means of a ball joint. Due to the high pressing forces resulting from the application of pressure to the pistons, hydrostatic relief can also be formed at the sliding bearing point between the sliding shoes and the running surface.
  • Known sliding shoes consist of a ball joint head with which the sliding shoe is attached to the piston in an articulated manner, a sliding shoe plate with which the sliding shoe is supported on the running surface and on which the tribologically favorable layer can be applied, and a sliding shoe neck between the ball joint head and the Slide shoe plate is formed.
  • the ball joint head, the sliding shoe neck and the sliding shoe plate are formed from a one-piece steel body.
  • the sliding shoes consist of a solid material. If necessary, a tribologically favorable material can be joined to the steel body on the end face of the slide shoe plate.
  • Such sliding blocks which are made of solid material and are therefore one-piece, lead to high inertial forces when the displacement machine is in operation with a rotating cylinder drum in which the pistons with the sliding blocks are arranged to be longitudinally displaceable. Due to the high inertia forces, high centrifugal forces occur on the sliding shoes at higher speeds of the cylinder drum when the displacement machine is in operation, which can lead to the sliding shoes tipping off the running surface. Tipping the sliding shoes off the running surface can damage the displacement machine.
  • the inertial forces of the sliding shoes can be reduced if the sliding shoe is made of a material with a lower density and lower strength, for example aluminum.
  • a sliding shoe made of aluminum leads to a lower power density of the displacement machine, since the pistons can only be subjected to lower pressures.
  • the DE 10 2012 108 014 A1 discloses a hydrostatic displacement unit in which the pistons are supported on a stroke-generating running surface by means of sliding shoes which are hingedly attached to the pistons.
  • the sliding shoes are designed as hollow bodies to reduce the inertia forces and centrifugal forces.
  • the sliding shoe designed as a hollow body can also be made in several parts and the components of the sliding shoe can be welded to one another, for example by means of electron beam welding, laser welding or friction welding.
  • the EP 1 262 269 A1 discloses joining two components of a vehicle frame, which have a large axial overlap area, by means of magnetic pulse welding by energizing several coils one after the other.
  • the present invention is based on the object of providing a method for producing a sliding shoe of the type mentioned at the outset, with which a sliding shoe can be produced with little manufacturing effort which has low inertia forces at high speeds.
  • the sliding shoe is formed from several components of different densities, the components being connected to form the sliding shoe by magnetic pulse welding.
  • the sliding shoe which consists of the ball joint head, the sliding shoe plate and the sliding shoe neck, is formed by several and thus at least two components which have different densities.
  • the components and thus materials of different densities are welded to form a sliding shoe by magnetic pulse welding. With magnetic pulse forming, a magnetic pulse is generated, through whose energy input components and thus materials of different densities can be welded together with little manufacturing effort.
  • Magnetic pulse welding of several components of different densities to form a sliding shoe makes it possible to manufacture a lightweight sliding shoe with little manufacturing effort, on which only low inertia and centrifugal forces act at high speeds.
  • the sliding shoe according to the invention the inertial forces acting on the sliding shoe at high speeds are reduced, whereby the running of the sliding shoes according to the invention on the running surface can be improved and tilting of the sliding shoes from the running surface can be prevented.
  • the sliding shoe is formed from a first component, on which the ball joint head is formed, and from a second component, on which the sliding shoe neck and the sliding shoe plate are formed, wherein the first component and the second component are connected to the sliding shoe by magnetic pulse welding and thus welded.
  • the sliding shoe is formed from a first component on which the ball joint head and the sliding shoe neck are formed, and from a second component on which the sliding shoe plate is formed, the first component and the second component through Magnetic pulse welding connected to the slide shoe and thus welded.
  • the second component can, according to an advantageous embodiment of the invention, be formed as a circular plate or as an annular disc.
  • the first component consists of a material of higher strength, in particular steel
  • the second component consists of a material of lower strength, in particular brass or aluminum.
  • the first component which is provided with the ball joint head and consists of a material of higher strength
  • a high level of strength is achieved on the ball joint between the piston and sliding shoe, so that the pistons can be subjected to high pressures and thus a high power density of the displacement machine is achieved can be.
  • the second component which consists of a material with lower strength and lower density, it is possible to reduce the inertia forces acting on the sliding shoe at high speeds of the displacement machine.
  • a hydrostatic displacement machine 1 with sliding shoes 6 of the prior art is shown in a longitudinal section.
  • the illustrated embodiment shows an axial piston machine with a swash plate design as an example of a hydrostatic displacement machine 1.
  • the displacement machine 1 has a cylinder drum 3 rotatably mounted about an axis of rotation 2, which is provided with several piston recesses 4 arranged concentrically to the axis of rotation 2, which are preferably formed by cylinder bores and in each of which a piston 5 is longitudinally displaceable.
  • the pistons 5 are supported in the area protruding from the cylinder drum 3 by means of a sliding shoe 6 as a support element on a stroke-generating running surface 7, which is formed by a swash plate 8 arranged in a rotationally fixed manner about the axis of rotation 2.
  • the swash plate 8 can be attached to a housing 9 of the displacement machine 1 - as in FIG Figure 1 is shown - be integrally formed or non-rotatably attached, the displacement machine 1 having a fixed displacement volume.
  • the cylinder drum 3 is supported in the axial direction of the displacement machine 1 opposite the running surface 7 on a housing-side distributor 10, which forms a control surface 11.
  • the control surface 11 is provided with kidney-shaped control recesses which enable an inlet channel 14 and an outlet channel 13 in the housing 9 to be connected to the piston recesses 4.
  • the distributor 10 can be formed by a disk-shaped component which is fastened in a rotationally fixed manner to the housing 9, for example a housing cover 9a of the housing 9.
  • the distributor 10 can be integrally formed on the housing 9, for example a housing cover 9a of the housing 9, so that the function of the control surface 11 is integrated into the housing 9, 9a.
  • control surface 11 can as in the Figure 1 shown be flat or spherical.
  • the cylinder drum 3 is penetrated by a central bore through which a drive shaft 15 arranged concentrically to the axis of rotation 2 passes through the cylinder drum 3 is led.
  • the drive shaft 15 is rotatably mounted in the housing 9, 9a by means of bearings 16, 17.
  • the cylinder drum 3 is non-rotatably connected to the drive shaft 15 by means of driving teeth 18, but is axially displaceable. Also shown is a pressure spring 19 which presses and supports the cylinder drum 3 in the axial direction on the control surface 11.
  • the sliding shoes 6 are connected in an articulated manner to the respective piston 5 by means of a sliding shoe joint designed as a ball joint 25.
  • the ball joint 25 between the piston 5 and the sliding block 6 consists of a ball 26 and a dome 27.
  • the ball 26 is fastened in the dome 27, for example, by a positive connection in which an edge area of the dome 27 is deformed around the ball 26 to enclose form-fitting.
  • the sliding shoes 6 consist of a ball joint head 6a with which the sliding shoe 6 is articulated to the piston 5, a sliding shoe plate 6b with which the sliding shoe 6 is supported on the running surface 7, and a sliding shoe neck 6c, which is located between the ball joint head 6a and the Slide shoe plate 6b is formed.
  • the ball joint head 6a, the sliding shoe neck 6c and the sliding shoe plate 6b are formed from a one-piece steel body, so that the sliding shoe 6 consists of a solid material.
  • the sliding shoes 6 and the running surface 7 form a sliding bearing point at which a relative movement occurs between the sliding shoes 6 rotating with the cylinder drum 3 and the piston 5 and the running surface 7 that is non-rotatably attached to the housing 9.
  • a bearing metal layer 28 for example a brass plate, can be joined as a tribologically favorable bearing metal material to the end face of the sliding shoe plate 6b facing the running surface 7.
  • the sliding shoes 6 on the running surface 7 are hydrostatically relieved.
  • the hold-down device 20 is designed as a hold-down disk which interacts with contact surfaces on the slide shoe 6.
  • the sliding shoes 6 according to the invention in the Figures 2 to 4 are formed by several components B1, B2, of different densities in the illustrated exemplary embodiments, which are connected by magnetic pulse welding to form the sliding block 6 and are thus welded.
  • the components B1, B2 are welded to one another by weld seams SW by means of magnetic pulse welding.
  • the ball joint head 6a is formed on the first component B1 and the slide shoe neck 6c and the slide shoe plate 6b are formed on the second component B2.
  • the two components B1, B2 are connected to one another to form the sliding shoe 6 with a weld SW, which is arranged on the facing end faces between the ball joint head 6a and the sliding shoe neck 6c.
  • the ball joint head 6a and the sliding shoe neck 6c are formed on the first component B1 and the sliding shoe plate 6b is formed on the second component B2.
  • the second component B2 is designed as a circular plate 30.
  • the two components B1, B2 are connected to one another to form the sliding shoe 6 with a weld SW, which is arranged on the facing end faces between the sliding shoe neck 6c and the sliding shoe plate 6b designed as a circular plate 30.
  • the second component B2 is designed as an annular disc 31 which is provided with a bore 32 into which the first component B1 with the pin-shaped sliding shoe neck 6c can be inserted.
  • the two components B1, B2 with a weld seam SW, which between the outer surface of the sliding shoe neck 6c and the inner wall of the Bore 32 of the slide shoe plate 6b designed as an annular disk 31 is arranged, connected to one another to form the slide shoe 6.
  • the first component B1 consists of a material of higher strength, for example steel, and the second component B2 of a material with lower strength, for example brass or aluminum.
  • the ball joint head 6a of the sliding blocks 6 is designed as a ball 26 of the ball joint 25.
  • the spherical cap 27 of the ball joint 25 is then as in FIG Figure 1 shown, arranged on the piston 5.
  • the invention is not limited to this arrangement of the ball 26 and spherical cap 27.
  • the ball joint head 6 a of the sliding shoes 6 can be designed as a spherical cap 27 of the ball joint 25.
  • the ball 26 of the ball joint 25 is then arranged on the piston 5.
  • a contact surface 35 for a hold-down device 20 is also formed in each case.
  • the first component B1 on which the ball joint head 6a is arranged consists of a material of higher strength and higher density
  • high strength is achieved at the ball joint 25 between piston 5 and sliding shoe 6, see above that the pistons 5 can be subjected to high pressures and thus a high power density of the displacement machine 1 can be achieved.
  • the second component B2 consists of a material with lower strength and lower density
  • the running of the sliding shoes 6 on the running surface 7 can be improved and the risk of the sliding shoes 6 tipping over from the running surface 7 can be reduced.
  • the components B1, B2 of different strengths and different densities can be made into sliding shoes 6 with little manufacturing effort are welded, so that bimetallic and lightweight sliding shoes 6 according to the invention can be produced with little manufacturing effort.
  • the two components B1, B2 are inserted into an annular coil in the area of the joint, on which a magnetic field (electromagnetic pulse) is generated during magnetic pulse welding.
  • a magnetic field electromagnettic pulse
  • the weld seam SW is produced between the two components B1, B2.
  • Sliding shoes 6 produced according to the invention can also be used in axial piston machines of bent axis design or in radial piston machines.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Reciprocating Pumps (AREA)

Claims (5)

  1. Procédé de fabrication d'un patin coulissant (6) d'une machine volumétrique hydrostatique (1), en particulier d'une machine à piston axial, qui peut être fixé de manière articulée à un piston sous pression (5) et qui soutient le piston (5) au niveau d'une surface de roulement (7) produisant un levage, le patin coulissant (6) étant composé d'une rotule (6a) à laquelle le patin coulissant (6) est fixé de manière articulée au niveau du piston (5), d'une plaque de patin coulissant (6b) par laquelle le patin coulissant (6) prend appui sur la surface de roulement (7), et d'un col de patin coulissant (6c) qui est formé entre la rotule (6a) et la plaque de patin coulissant (6b),
    caractérisé en ce que le patin coulissant (6) est formé par plusieurs composants (B1, B2) de densité différente, ces composants (B1, B2) étant reliés en patin coulissant (6) par soudage par impulsions magnétiques.
  2. Procédé selon la revendication 1, caractérisé en ce que le patin coulissant (6) est réalisé à partir d'un premier composant (B1) sur lequel est formée la rotule (6a) et d'un deuxième composant (B2) sur lequel le col de patin coulissant (6c) et la plaque de patin coulissant (6b) sont formés, le premier composant (B1) et le deuxième composant (B2) étant reliés en patin coulissant (6) par soudage par impulsions magnétiques.
  3. Procédé selon la revendication 1, caractérisé en ce que le patin coulissant (6) est réalisé à partir d'un premier composant (B1) sur lequel sont formés la rotule (6a) et le col de patin coulissant (6c), et d'un deuxième composant (B2) sur lequel est formée la plaque de patin coulissant (6b), le premier composant (B1) et le deuxième composant (B2) étant reliés en patin coulissant (6) par soudage par impulsions magnétiques.
  4. Procédé selon la revendication 3, caractérisé en ce que le deuxième composant (B2) est réalisé sous forme de plaque circulaire (30) ou de disque annulaire (31) .
  5. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le premier composant (B1) est composé d'un matériau de résistance supérieure, en particulier d'acier, et le deuxième composant (B2) est composé d'un matériau de résistance inférieure, en particulier de laiton ou d'aluminium.
EP17193761.8A 2016-10-12 2017-09-28 Procédé de fabrication d'un sabot oscillant d'une machine volumétrique hydrostatique Active EP3309392B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016119415.8A DE102016119415A1 (de) 2016-10-12 2016-10-12 Verfahren zur Herstellung eines Gleitschuhs einer hydrostatischen Verdrängermaschine

Publications (2)

Publication Number Publication Date
EP3309392A1 EP3309392A1 (fr) 2018-04-18
EP3309392B1 true EP3309392B1 (fr) 2021-11-24

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Application Number Title Priority Date Filing Date
EP17193761.8A Active EP3309392B1 (fr) 2016-10-12 2017-09-28 Procédé de fabrication d'un sabot oscillant d'une machine volumétrique hydrostatique

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EP (1) EP3309392B1 (fr)
DE (1) DE102016119415A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH716310B1 (de) * 2019-06-12 2023-03-15 Urben & Kyburz Ag Bauteil für eine Kolbenmaschine und Verfahren zur Herstellung des Bauteils.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL149873A0 (en) * 2001-05-31 2002-11-10 Dana Corp Method for performing a magnetic pulse welding operation
DE10306792B4 (de) * 2003-01-23 2007-03-22 Valeo Compressor Europe Gmbh Kolben, insbesondere für einen Axialkolben-Verdichter, und Verfahren zur Herstellung desselben
DE102008012761B4 (de) * 2008-03-05 2016-07-07 Ab Skf Bauelement einer Wälzlagerung und Verfehren zum Herstellen des Bauelements
DE102012108014A1 (de) * 2012-08-30 2014-03-06 Linde Hydraulics Gmbh & Co. Kg Gleitschuh einer hydrostatischen Axialkolbenmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP3309392A1 (fr) 2018-04-18
DE102016119415A1 (de) 2018-04-12

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