Large-drift-diameter sectional valve element hydraulic control reversing valve

Abstract

The invention discloses a large-drift-diameter sectional valve element hydraulic control reversing valve. The large-drift-diameter sectional valve element hydraulic control reversing valve is sensitive in action and small in leakage amount. According to the technical scheme, sliding valve sleeves and valve elements are segmented into first sliding valve elements and second sliding valve elements which do linear motion in valve cavities of the first sliding valve sleeves and valve cavities of the second sliding valve sleeves, linear array annular grooves arranged at intervals are formed in thesegmented valve sleeves, and an H-shaped oil sealing section of a dumbbell-shaped structure is manufactured on each valve element; the oil sealing lengths of dumbbell valve element table oil sectionsof the second sliding valve elements are larger than or equal to the oil sealing length value given by the first sliding valve sleeves, and the reversing stroke and the reversing distance of the sum of the width distances of undercutting grooves in valve element necks of two dumbbell valve element tables are basically equal; and in the moving process of the valve elements, the first sliding valveelements are in butt joint with the second sliding valve elements to do linear motion in the cavities of the first sliding valve sleeves and the cavities of the second sliding valve sleeves, one of the two adjacent oil sealing lengths is decreased, the other oil sealing length is increased, the pressure difference of a high-pressure cavity and a low-pressure cavity is formed, and fluid mechanics shows that the annular gap leakage amount is inversely proportional to the oil sealing lengths.

Description

technical field [0001] The invention relates to a segmented slide valve structure applied to a hydraulic control valve of a mechanical hydraulic control system. Background technique [0002] The hydraulic control valve is an important component that directly affects the working process and working characteristics of the hydraulic system. It is used to control the flow direction of the liquid in the hydraulic system and adjust the pressure and flow of the liquid. After proper combination of different hydraulic valves, it can meet Various types of actuators overcome the requirements of external loads, changing the direction of movement and speed of movement, so they are an important part of the hydraulic system. Pressure control valves include relief valves, pressure reducing valves, sequence valves, and pressure relays, which are used to control the oil pressure in the hydraulic system or to achieve control through pressure signals. The pressure control valve controls the oi...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a large-diameter segmented spool fluid with sensitive action, reliable reset and small leakage in view of the excessive length of the slide valve, the deformation under various working conditions, and the influence on the fit clearance. Control the reversing valve to solve the problem that the length of the slide valve is too long and the sealing ring is easily damaged during the installation process

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