Multi-way valve with upstream pressure compensation and hydraulic system

• Main Authors: LIU DONGHONG, ZHAO YUCHUN, XIANG XIAOQIANG, DONG WENBIN, GAO DEHUA
• Format: Patent
• Language: Chinese; English
• Published: 30.05.2023
• Subjects: ACTUATING-FLOATS; BLASTING; COCKS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR; DEVICES FOR VENTING OR AERATING; ENGINEERING ELEMENTS AND UNITS; FLUID-PRESSURE ACTUATORS; FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HYDRAULICS OR PNEUMATICS IN GENERAL; LIGHTING; MECHANICAL ENGINEERING; SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; TAPS; THERMAL INSULATION IN GENERAL; VALVES; WEAPONS

A one-way valve is installed on a parallel oil way of the multi-way valve, an external oil source can be introduced, pilot pressure is arranged at the end of a pressure compensation valve element to control the pressure compensation valve element to be closed, and when the multi-way valve controls single action, double oil sources converge to an inlet of a reversing valve; when the two actions are combined, the pressure compensator in front of the valve is switched and closed through electric control, so that the two oil sources are isolated and supplied to each path of execution element without mutual interference. The hydraulic system can be matched with a variable pump to form a hydraulic system loop for supplying oil by multiple oil sources, so that the working speed of a single-action loop is increased, and the control stability and the flow dividing precision during compound action are improved. 本实用新型公开了一种阀前压力补偿的多路阀及液压系统，多路阀并联油路装有单向阀，可引入外接油源，压力补偿阀芯端部设有先导压力控制其关闭，可以实现多路阀控制单动作时，双油源合流到换向阀入口；两个动作复合时，电控切换关闭阀前