Connecting structure of oil injection pump outlet valve connector and high pressure oil pipe

Abstract

The invention provides a connecting structure of an oil injection pump outlet valve connector and a high pressure oil pipe. The connecting structure comprises a high pressure oil pipe pier head structure and the oil injection pump outlet valve connector. The pier head conical surface angle of the high pressure oil pipe pier head structure is smaller than the taper angle of the oil injection pump outlet valve connector, and a line sealing structure is formed at the contact position of two conical surfaces which make contact with each other. Compared with the prior art, the connecting structure has the following advantages that the design philosophy before is changed, the pier head conical surface angle of the high pressure oil pipe is designed to be smaller than the taper angle of the oil injection pump outlet valve connector all the time, the two conical surfaces make contact with each other to form the line sealing mode, and thus the sealing effect is superior to that of surface sealing. By means of testing and trail run inspection at all the stages of a diesel engine, even though the high pressure oil pipe is dismounted and mounted again, no pier head leakage phenomenon happens, and reliability of the high pressure oil pipe is improved.

Description

technical field [0001] The invention belongs to the technical field of engine oil passage sealing, and in particular relates to a connection structure between an oil outlet valve joint of an oil injection pump and a high-pressure oil pipe. Background technique [0002] In the prior art, during the working process of the diesel engine, leakage occurs at the pier head of the high-pressure oil pipe. If leakage occurs, it will not only affect the reliability of the high-pressure oil pipe, but also affect the performance of the fuel system, and further damage the diesel engine. Reliability and performance impact. Contents of the invention [0003] In view of this, the present invention aims to propose a fuel injection pump outlet valve joint and high-pressure oil pipe pier head structure to solve the leakage phenomenon at the pier head, improve the reliability of the high-pressure oil pipe, and reduce the impact on the reliability and performance of the engine. influences. ...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, during the working process of the diesel engine, leakage occurs at the pier head of the high-pressure oil pipe. If leakage occurs, it will not only affect the reliability of the high-pressure oil pipe, but also affect the performance of the fuel system, and further damage the diesel engine. impact on reliability and performance

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