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Component which conducts high-pressure medium

A technology for structural elements and high-pressure media, applied in pump elements, engine elements, components of pumping devices for elastic fluids, etc., can solve problems such as aggravation of the processing process, and achieve the effect of increasing temperature stability and reducing deviation.

Active Publication Date: 2016-06-29
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the occurrence of local high stresses at the high-pressure sealing point is exacerbated by the angular advance (Winkelübertreibung) formed on the sealing surface and by the machining process on the pump cylinder

Method used

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  • Component which conducts high-pressure medium
  • Component which conducts high-pressure medium
  • Component which conducts high-pressure medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] figure 1 The basic structure of a high-pressure pump 1 for a common rail injection system is shown, which has five pump elements consisting of a pump cylinder 2 and a pump piston 3 . A camshaft 4 driven by an internal combustion engine is mounted in a pump housing 5 and moves a pump piston 3 up and down in a pump cylinder 2 via a roller tappet 6 . The contact between roller tappet 6 and cam is maintained by compression spring 7 . During the downward stroke of the pump piston 3 , via the suction valve 8 , the fuel quantity determined by the metering unit 10 is suctioned out of the pump suction chamber 11 extending circularly around the pump element in the longitudinal direction of the pump housing and It is then pressed into the rail 12 via the pressure valve 9 during the upward stroke.

[0024] exist figure 2 A cross-section of a valve unit according to the prior art is shown in . Arranged in the upper region of the pump cylinder 2 is a valve carrier 13 and a press...

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PUM

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Abstract

In the case of a component which conducts high-pressure medium, comprising a first component (13) with at least one pressure duct (29) and a second component (2) with a pressure chamber (30), wherein an annular sealing surface (32), which surrounds the mouth(s) of the at least one pressure duct (29), of the first component (13) and an annular sealing surface (33), which surrounds the rim of the pressure chamber (30), of the second component (2) interact areally with one another to form a sealing point, wherein the cross-sectional area of the pressure duct (29) is smaller than the cross-sectional area of the pressure chamber (30), the pressure-induced radial expansion of the annular sealing surfaces (32, 33) is substantially equal.

Description

technical field [0001] The invention relates to a structural element for conducting a high-pressure medium, comprising a first part with at least one pressure channel and a second part with a pressure chamber, wherein an annular seal of the first part surrounds the opening of the at least one pressure channel The surface and the annular sealing surface of the second part, which surrounds the edge of the pressure chamber, cooperate with each other in the form of a surface in order to form the sealing point, wherein the cross section of the pressure channel is smaller than the cross section of the pressure chamber. Background technique [0002] Such a structural element can be designed, for example, as a pump element for a common rail high-pressure pump. A pump element is generally equipped with a pump cylinder, a pump piston and a valve unit, wherein the valve unit has a suction valve and a pressure valve, in which a suction valve element or a pressure valve element, respecti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B1/04
CPCF02M59/442F02M59/485F16J15/04F04B1/0448F04B1/0452F02M55/02F02M55/025F02M59/102F02M59/46F04B7/02F04B9/042F04B53/1087F04B53/162
Inventor M·埃尔曼H·扎斯尼克
Owner ROBERT BOSCH GMBH
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