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Low-pressure sealing rings for pump units of hydraulic equipment

A technology for low-pressure sealing and hydraulic equipment, which is applied to the components of the pumping device for elastic fluids, the sealing of the engine, and the pump components. , the effect of preventing tilt

Inactive Publication Date: 2016-10-26
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

They advantageously seal between the pump casing and the pump piston, but at the same time face the danger of flipping between the pump casing and the pump piston in the worst case
This can result in damage to the low pressure seal and leaks

Method used

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  • Low-pressure sealing rings for pump units of hydraulic equipment
  • Low-pressure sealing rings for pump units of hydraulic equipment
  • Low-pressure sealing rings for pump units of hydraulic equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] figure 1 A pump unit 10 of a hydraulic system is shown, which is arranged in a block-shaped pump housing 12 . The hydraulic system can implement, in particular, antilock, antiskid and driving dynamics control functions (ABS, ASR and ESP) on the vehicle brakes of the corresponding vehicle braking system.

[0016] A stepped hole 14 in which the pump unit 10 is disposed is formed in the pump housing 12 . The stepped bore 14 has three shoulders 16 , 18 and 20 through which the diameter 14 decreases in a stepwise increasing manner from the outside to the inside. The pump unit 10 has a multi-part pump cylinder 22 which surrounds a likewise multi-part pump piston 24 .

[0017] The multi-part pump cylinder 22 includes an annular filter 26 on which brake fluid can be fed through the pump housing 12 from radially outward to radially inward via an inlet 28 . Pointing axially outward, a cylinder cup 30 is connected to the filter 26 , by means of which the pressure chamber 32 is ...

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PUM

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Abstract

The invention relates to a low pressure sealing ring (58) for a pump element (10) of a hydraulic unit of a motor vehicle brake system, comprising a pump housing (12) and a pump piston (24) that is led in a movable manner in the pump housing, wherein said low pressure sealing ring is adapted to seal with respect to the pump housing (12) and for sealing with respect to the pump piston (24) and further comprises a stepping (66), by means of which said pump piston can be positioned on a recess (18) on the pump housing (12).

Description

technical field [0001] The invention relates to a low-pressure sealing ring for a pump unit of a hydraulic system of a vehicle brake system, the pump unit having a pump housing and a pump piston movably guided in the pump housing, wherein the low-pressure sealing ring is suitable for For sealing the pump casing and sealing the pump piston. In addition, the invention also relates to the application of such a low-pressure sealing ring on a pump unit of a hydraulic device of a vehicle brake system. Background technique [0002] As in a hydraulic system for regulating the brake pressure during an antilock function on a vehicle brake system, a pump housing is provided, in which at least two pistons, in particular, are displaceably mounted. The two pistons are axially reciprocated by means of a single eccentric drive and in this way suck in hydraulic fluid into and discharge hydraulic fluid from a respective pressure chamber formed upstream of the piston. The pressure chamber is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B1/04B60T1/04F04B53/02F04B53/14F04B53/16
CPCB60T8/4031F04B1/0408F04B1/0421F04B1/0448F04B53/02F04B53/143F04B53/164F16J15/3268
Inventor R·布劳恩
Owner ROBERT BOSCH GMBH