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Sealing and guiding device for a piston of a piston pump

A technology for guiding devices and piston pumps, which is applied in the direction of pumps, multi-cylinder pumps, liquid displacement machinery, etc. It can solve the problems that the sealing performance of piston pumps cannot be guaranteed, and achieve the effect of automatic calibration and long service life

Inactive Publication Date: 2009-08-05
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such seals are subject to severe temperature changes during operation
Especially at very low temperatures, e.g. when the car is started cold in winter, or at very high temperatures the leak-tightness of the piston pump cannot be guaranteed

Method used

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  • Sealing and guiding device for a piston of a piston pump
  • Sealing and guiding device for a piston of a piston pump
  • Sealing and guiding device for a piston of a piston pump

Examples

Experimental program
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Embodiment Construction

[0017] Such as figure 1 As shown, the piston pump 1 comprises a piston 6 which is driven via an eccentric 8 . The eccentric 8 rotates in the direction of the arrow C and is in contact with the end of the piston 6 . This causes the piston 6 to reciprocate in the direction of the double arrow D along the axial direction X-X of the piston pump 1 . Four (or two) transverse bores 6a are provided in the piston 6, through which the fluid from the supply line 32 flows through the filter 9 into the longitudinal bores 9b. This is indicated by arrow A.

[0018] The piston pump 1 also comprises an inlet valve 12 , an outlet valve 17 and a pressure chamber 33 arranged between the inlet valve 12 and the outlet valve 17 . The pressure chamber 33 is arranged inside the cylinder part 11 , which has a substantially bowl-shaped shape. A filter 9 is attached to the end of the cylinder part 11 directed toward the eccentric 8 . An inlet valve 12 is arranged on the end of the piston 6 on the pr...

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PUM

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Abstract

The present invention relates to a sealing and guiding arrangement for sealing against a piston (6) of a pump, comprising a guide ring (21), a support ring (22) and a sealing element (23), wherein the support ring (22) is arranged between the sealing element (23) and the guide ring (21), and a contact area of the guide ring (21) with respect to the support ring (22) has at least one region (21a) which is situated outside a plane (E) perpendicular to a longitudinal axis (X-X) of the piston, wherein the region is arranged so as to be inclined with respect to the plane (E).

Description

technical field [0001] The invention relates to a sealing and guiding device for sealing and guiding the outer circumference of a piston, in particular for a piston pump. Background technique [0002] Piston pumps are used, for example, in hydraulic systems or brake systems in motor vehicles. Piston pumps of this type have a piston which is moved, for example, by means of an eccentric. In this case, a separate sealing element and a separate guide element for guiding the piston are arranged on the piston. However, such seals are subject to severe temperature changes during operation. Especially at very low temperatures, such as when the vehicle is started cold in winter, or at very high temperatures the leak-tightness of the piston pump cannot be guaranteed. In particular at very low temperatures, the seal hardens, so that a sickle-shaped gap can be produced between the seal and the piston in the guide gap due to the movement of the piston. Contents of the invention [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B1/04
CPCB60T8/4031F04B1/0448
Inventor R·谢普H·赫尔曼R·菲尔梅特J·黑克R·沃尔夫
Owner ROBERT BOSCH GMBH
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