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Device for reducing pressure pulsations in hydraulic manifolds

A pressure pulsation, pressure technology, applied in the direction of pipe elements, fluid flow, springs/shock absorbers, etc., can solve problems such as high cost

Inactive Publication Date: 2003-02-26
DOBSON INDS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The self-adaptation of the operating pressure via the throttling line requires an additional structural element which itself, together with its structural complexity, makes it expensive

Method used

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  • Device for reducing pressure pulsations in hydraulic manifolds
  • Device for reducing pressure pulsations in hydraulic manifolds
  • Device for reducing pressure pulsations in hydraulic manifolds

Examples

Experimental program
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Embodiment Construction

[0026] figure 1 A cross-section of a passive pulsation damper according to the invention, which is suitable, for example, for installation in a hydraulic line system of a power steering of a motor vehicle is shown in simplified outline. according to figure 1 The pulsation damper of the present invention is connected to the hydraulic line either between the input port 3 and the output port 5 or in a branch of the hydraulic line such that the line is connected to the pulsation damper via the connecting line 3a or 5a. The connecting line 3a or 5a leads to a balance chamber 7 which is divided into a hydraulic balance chamber 13 by a membrane 9 , such as a metal membrane, an elastic body or a movable wall.

[0027] The pressure balance chamber 13 is connected with the gas chamber 17 in the energy storage membrane 15 through the through hole 14 . The gas chamber 17 and the energy storage membrane 15 form a so-called gas spring. Of course, mechanical springs or other spring elemen...

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PUM

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Abstract

The invention relates to a device for reducing pressure pulsations caused in a hydraulic system, especially by a pump. Said device comprises a compensation volume (41) with a displaceable wall or membrane (39) that is located in said volume and that shuts off the volume. On one side, said wall or membrane is impinged upon with pulsations and on the opposite side with a counter-pressure which corresponds to at least approximately the average pressure of the hydraulic system. The pressure compensation volume (43) that is applied on the opposite side of the wall or membrane (39) is linked with the hydraulic system via a compensation manifold (51), said manifold (51) opening into the hydraulic system downstream of the compensation volume (41) in the direction of propagation of the pulsations.

Description

technical field [0001] The invention relates to a device according to the preamble of claim 1 for reducing pressure pulsations in a hydraulic line, in particular via a pump, and to a motor vehicle power steering with such a device. Background technique [0002] The movement of most hydrostatic or other pumps used in oil hydraulic circuits and the manipulation of fittings, valves and regulating devices results in pressure fluctuations which are the root cause of unwanted noise in hydraulic systems. Furthermore, a further consequence is that the lines, their fastenings and connected consumers are stressed to a certain degree. [0003] In this way, the power supply to, for example, the power steering and other hydraulic consumers in a motor vehicle takes place via the hydraulic squeeze unit. Due to the discontinuous delivery process, the extrusion unit causes pressure pulsations or volume flow pulsations which propagate through the hydraulic medium in the line system. Especia...

Claims

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Application Information

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IPC IPC(8): F16L55/04F15B1/08F15D1/02F16F15/02F16F15/023F16F15/04F16J3/02F16L55/05F16L55/053
CPCF16L55/053F16L55/05
Inventor 克劳斯-于尔根·库尔
Owner DOBSON INDS CORP
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