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Tribo system for a piston unit and hydrostatic radial piston engine equipped therewith

A radial piston machine, hydrostatic technology, applied to the components of pumping devices for elastic fluid, reciprocating piston engines, pistons, etc., can solve the problems of high manufacturing cost, no obvious improvement in starting efficiency, etc. The effect of improving starting efficiency, reducing friction coefficient and improving starting efficiency

Inactive Publication Date: 2014-06-18
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its disadvantage is that this pressure relief does not significantly improve the starting efficiency and in addition results in relatively high manufacturing costs

Method used

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  • Tribo system for a piston unit and hydrostatic radial piston engine equipped therewith
  • Tribo system for a piston unit and hydrostatic radial piston engine equipped therewith

Examples

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Embodiment Construction

[0027] figure 1 An axial longitudinal section through an exemplary embodiment of the radial piston machine 1 mentioned at the outset is shown. In this exemplary embodiment, the radial piston machine 1 is a radial piston motor with an outer piston bearing, which is usually used as a hydraulic motor. The specific function of such a radial piston machine is described, for example, in document DE 40 37 455 C1.

[0028] The radial piston machine 1 has a centrally arranged shaft 2 with which elements fastened thereon can be driven. The shaft 2 is driven by a surrounding rotor 4 in which a plurality of cylinders 6 are formed. In this embodiment, the radial piston machine 1 has exactly eight cylinders 6, in figure 1 Only three of them are shown as complete and the other two are half cylinders respectively. The cylinders 6 are arranged radially or radially around the shaft 2 . Each cylinder 6 furthermore has a main bore 8 and radially set-back guide bores 10 , in which each a pist...

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Abstract

A tribosystem for a piston unit includes the piston unit having a piston and at least one rolling body mounted rotatably in a rolling-body receptacle of the piston. The rolling-body receptacle is substantially comprised of a bearing material having a PEEK / PTFE matrix. A surface of the at least one rolling body is polished.

Description

technical field [0001] The invention relates to a friction system for a piston unit according to the preamble of claim 1 and to a hydrostatic radial piston machine equipped with such a friction system having the features of claim 13 . Background technique [0002] Tribological systems, which are also referred to simply as tribological systems and are often used in this specialized concept, are known in machine building and fine mechanics for describing the interaction of contacting bodies moving relative to one another. In particular, tribological systems are used in machine construction to describe the friction and wear of objects that interact in contact with themselves and, if applicable, with intermediate materials. The intermediate material used here can be, for example, a lubricant. [0003] It is also known, for example, to use a piston unit in radial piston machines, in which a piston guided in a cylinder is supported by rolling bodies mounted in the piston on a li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B1/04F04B53/00F01B1/06F16C32/00
CPCF16J1/00F01B1/0606F01B1/0644F01B1/0651F01B13/061F03C1/0406F03C1/0412F04B1/0408F04B1/0417F16J1/20
Inventor K·蒂巴里J·菲舍尔
Owner ROBERT BOSCH GMBH
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