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Pistons for radial piston pumps

A radial piston pump and piston technology, which is applied to the components, pistons, cylindrical pistons, etc. of the pumping device for elastic fluid, can solve the problems of large processing cost and large point load, and achieve low processing cost and efficiency. Optimizing and reducing the effect of wear

Inactive Publication Date: 2017-12-15
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this is that a large point load occurs between the piston and the associated cylinder
In order to achieve the required surface properties or surface quality, a large processing cost is required

Method used

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  • Pistons for radial piston pumps
  • Pistons for radial piston pumps
  • Pistons for radial piston pumps

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] figure 1 A partial view of a radial piston pump or radial piston engine is shown in the form of a cross-sectional view. It has a surrounding wavy stroke curve or lifting curve (Hubkurve) 1 and eight cylinder-piston-units, figure 1 Only three of them are complete and parts of the other two are shown in. The cylinder is arranged in a rotating rotor 2 in a radial direction or in a star shape, and the stroke curve 1 is formed on a cam disc 4 at a fixed position. Depending on the type of machine, the rotation of the rotor 2 is transmitted to a shaft 5 (motor) or vice versa from the shaft 5 to the rotor 2 (pump).

[0033] Each cylinder has a main part 6 and on its side facing the shaft 5 a guiding part 8 which is one step smaller or degraded in the radial direction.

[0034] Each cylinder-piston-unit has a rolling element 10, which rolls along the stroke curve 1 when the rotor 2 rotates, and makes a vibrating stroke motion or reciprocating linear motion relative to a longitudinal...

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PUM

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Abstract

A piston for a radial piston pump is known which has a metallic core which is actually equipped with a housing made of plastic. The housing can be formed in one piece with a bearing sleeve made of PEEK and sprayed onto the core.

Description

Technical field [0001] The invention relates to a piston used in a radial piston pump or a radial piston engine. Background technique [0002] Radial piston pumps have a cylinder-piston unit arranged in a radial or star shape, where, for example, a wavy stroke curve located on the outside causes the piston to vibrate relative to the associated cylinder. The cylindrical rolling elements roll on the stroke curve, and a piston is supported on the rolling elements. The piston is contained in a central cylinder here. The number of strokes of each piston when the machine rotates is determined by the number of cams on the circumference of the stroke curve. [0003] The piston of this radial piston pump is manufactured from metal according to the prior art. [0004] The document DE 40 37 455 C1 shows a radial piston pump, where a bearing sleeve is shown in the groove of each piston in the support area for the equipped cylindrical rolling element, which is opposite to the cylindrical The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B53/14
CPCF04B53/14F05C2253/04F05C2253/12F16J1/01
Inventor B·卡内
Owner ROBERT BOSCH GMBH