Parallel-connection pressure reducing valve type double-oil-way fast-oil-charging hydraulic gear shift system

Abstract

A parallel-connection pressure reducing valve type double-oil-way fast-oil-charging hydraulic gear shift system comprises a pressure regulating oil way composed of an existing hydraulic gear shift pressure control valve, and a fast oil charging oil way composed of a check valve and a pressure reducing valve. An oil inlet of the pressure regulating oil way is connected with a main oil way of the system, and an oil outlet of the pressure regulating oil way is connected with a gear shift clutch oil cylinder. An oil inlet of the fast oil charging oil way, namely an oil inlet of the pressure reducing valve, is connected with the main oil way of the system, and an oil outlet of the fast oil charging oil way, namely an oil outlet of the check valve, is connected with the gear shift clutch oil cylinder. An oil outlet of the pressure reducing valve is connected with an oil inlet of the check valve. According to the parallel-connection pressure reducing valve type double-oil-way fast-oil-charging hydraulic gear shift system, in the stage of charging liquid into the clutch hydraulic cylinder, oil is charged into the gear shift clutch hydraulic cylinder jointly through the fast oil charging oil way and the pressure regulating oil way so that the gear shift clutch hydraulic cylinder can be filled with the hydraulic oil faster, and the gear shift time can be effectively shortened.

Description

technical field [0001] The invention relates to a hydraulic gear shifting system, in particular to a parallel decompression valve type double oil circuit fast oil-filled hydraulic gear shifting system which can effectively shorten the gear shifting time of large-scale engineering machinery. Background technique [0002] With the continuous development and maturity of construction machinery related technologies in our country, people have higher and higher requirements for shift quality, that is, the shift process should be smooth and completed as quickly as possible to reduce the wear of friction elements and power interruption. Utilizing the power shift transmission is currently the most common method to improve the shifting quality, which is mainly ensured by adjusting the oil pressure change during the shifting process by the hydraulic shifting pressure control valve and then controlling the shifting clutch. [0003] In general, the shifting process includes filling the c...

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Problems solved by technology

[0005] In order to solve the problem of slowing down of the oil filling process existing in the existing hydraulic shift pressure control valve, the present invention aims to provide a novel parallel pressure reducing valve type double oil circuit rapid oil filling hydraulic shift valve that can effectively shorten the shift time. blocking system

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