Auxiliary pressure relief valve

Abstract

The invention relates to an auxiliary pressure relief valve which comprises a sliding valve body and a sliding valve core which is arranged in the valve body in a sliding way, wherein the sliding valve body is of a cylindrical structure with one open end, one end face of the sliding valve core, which is far away from the closed end of the valve body, is provided with an axial blind hole, the peripheral surface of the sliding valve body is provided with an oil outlet which is communicated with the axial blind hole, the sliding valve body is provided with an oil outlet channel which is communicated with the oil outlet after the sliding valve core bears an upstream oil-pumping pressure and is displaced; a pressure relief spring which is used for returning the sliding valve core after the upstream oil-pumping of the sliding valve core is completed is arranged between one end of the sliding valve core, which is far away from the axial blind hole, and the closed end of the sliding valve body; a sealing pressure relief route for downstream pressure relief during the returning process of the sliding valve core exists between the oil outlet and the inner wall face of the sliding valve body; and the peripheral face of the sliding valve core, which corresponds to the oil outlet, is provided with a peripheral ring groove, and / or the inner wall face of the sliding valve body, which corresponds to the oil outlet channel and matches with the oil outlet, is provided with a peripheral ring groove.

Description

technical field [0001] The invention relates to the technical field of centralized lubrication, in particular to an auxiliary pressure relief valve. Background technique [0002] Volumetric centralized lubrication technology has been widely used in the field of lubrication technology due to its high reliability, precise oil discharge, low cost and low pressure requirements for lubrication pumps and pipeline systems. In order to ensure the normal operation of the distributor of volume pressure relief centralized lubrication, this technology requires that after the operation of the lubricating pump, the oil pressure near the oil separator group in the main oil circuit must be completely removed, so that the oil separator can supply oil to each lubrication point. Therefore, in this structure, an unloading valve is installed at the oil outlet of the pump in the fuel tank. After the system stops running, the pressure relief port will be opened automatically, and the oil in the ma...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an auxiliary pressure relief valve to solve the problem of incomplete pressure relief in the existing volumetric lubrication system

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