Radial piston pump, and process for manufacturing a radial piston pump

Patent metadata

Field	Value
Publication number	US-2024240623-A1
Application number	US-202218289362-A
Country	US
Kind code	A1
Filing date	Apr 29, 2022
Priority date	May 10, 2021
Publication date	Jul 18, 2024
Grant date	—

Abstract

A radial piston pump, including a drive shaft having an eccentric and at least one piston-and-working chamber combination, wherein the piston-and-working chamber combination includes a working chamber and a piston. The radial piston pump includes at least two piston-and-working chamber combinations which extend radially from the drive shaft, wherein each working chamber is closed by a cover. The radial piston pump is equipped with at least one retaining ring for fixing all of the covers of the radial piston pump; and to a method for producing a radial piston pump.

First claim

1 - 23 . (canceled)

24 . A radial piston pump comprising:
a drive shaft having at least one piston-and-working chamber combination, wherein the piston-and-working chamber combination comprises a working chamber and a piston, and wherein the radial piston pump comprises at least two piston-and-working chamber combinations which extend radially from the drive shaft, wherein each working chamber is includes by a cover, wherein the radial piston pump includes at least one retaining ring for fixing all of the covers of the radial piston pump.

25 . The radial piston pump of claim 24 , wherein the radial piston pump includes at least three piston-and-working chamber combinations which are disposed in a star-shaped manner about the drive shaft.

26 . The radial piston pump of claim 24 , wherein the piston-and-working chamber combinations are received in a pump main body.

27 . The radial piston pump of claim 24 , wherein the cover has a contact face for the retaining ring.

28 . The radial piston pump of claim 24 , wherein the cover and/or the pump main body have/has a resting rim for the retaining ring.

29 . The radial piston pump of claim 24 , wherein the radial piston pump has at least two retaining rings for fixing all of the covers of the radial piston pump, and wherein the retaining rings are disposed axially behind one another.

30 . The radial piston pump of claim 24 , wherein an interference fit is provided between the retaining ring and the cover.

31 . The radial piston pump of claim 24 , wherein the internal diameter of the retaining ring has an internal diameter according to tolerance class IT7 or IT8.

32 . The radial piston pump of claim 24 , wherein the radial piston pump is equipped with a housing which is specified to receive at least in portions the pump main body, in particular the piston-and-working chamber combinations.

33 . The radial piston pump of claim 24 , wherein the housing of the radial piston pump is configured from at least two housing components, in particular a high-pressure housing, and/or a stator housing, in particular for receiving a rotor and a stator of an electric motor.

34 . The radial piston pump of claim 24 , wherein the retaining ring is integrated in the housing or at least one housing component.

35 . The radial piston pump of claim 24 , wherein the housing components are screwed to one another, in particular in that the housing components are screwed conjointly by means of a screw.

36 . The radial piston pump of claim 24 , wherein the pump main body includes a flange which serves for screw-fitting to the housing and/or the further housing components.

37 . The radial piston pump of claim 24 , wherein the housing components configure fluid ducts of the radial piston pump.

38 . The radial piston pump of claim 24 , wherein the housing component includes plane-parallel axial sealing faces.

39 . The radial piston pump of claim 24 , wherein the surfaces of the sealing faces of the housing component are equipped with concentric grooves, in particular with a corrugation in the radial direction.

40 . The radial piston pump of claim 24 , wherein the seals are disposed additionally or solely between the sealing faces.

41 . The radial piston pump of claim 24 , wherein the surfaces of the sealing faces have one or a plurality of geometric shapes which deviate from a planar or almost planar face.

42 . The radial piston pump of claim 24 , wherein the fluctuations in the mutual spacing of the housing components can be compensated for by the elasticity.

43 . A method for producing the radial piston pump of claim 24 , wherein the fixing of the retaining ring is performed by a thermal-shrinkage transverse interference fit between the covers and the retaining ring, comprising:
heating the retaining ring prior to assembly; joining the retaining ring to the covers; and cooling the retaining ring.

44 . A method for producing the radial piston pump of claim 24 , wherein fixing of the retaining ring is performed by a longitudinal interference fit between the covers and the retaining ring, comprising:
pushing the retaining ring onto the covers with an overlap; and elastically expanding the retaining ring.

45 . A method for producing the radial piston pump of claim 24 , wherein fixing of the retaining ring is performed by a welded connection, comprising:
slitting the retaining ring so as to generate a slit; joining the retaining ring to the covers; tensioning the retaining ring, preferably by means of a tool (W); and closing the slit.

46 . A method for producing the radial piston pump of claim 24 , wherein the cover is specified to be able to be elastically resilient and/or to elastically yield in order to configure a gap in the joint, but at least in the region of the contact face, wherein the covers, prior to joining the retaining ring, by means of a device/tool (W) are elastically pressed, in particular radially inward in order to provide a gap in the joint for the retaining ring for the duration of the joining procedure.

Assignees

• thyssenkrupp Presta Ilsenburg GmbH
• Thyssenkrupp Ag
• Thyssenkrupp Dynamic Components Gmbh

Inventors

• Mueller Ulf
• Mueller Tim

Classifications

• F04B1/0404

  Details or component parts · CPC title

• F04B17/03

  driven by electric motors · CPC title

• F04B1/0421 Primary

  Cylinders · CPC title