Two-dimensional switch electro-hydraulic piston

• Main Authors: RUAN JIAN, JI JIANBO, LI SHENG, SONG ZHANKAI, XUE RENZHENG, CAO JIE
• Format: Patent
• Language: Chinese; English
• Published: 13.05.2022
• 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 two-dimensional switch electro-hydraulic piston comprises a main valve and a pilot valve, the main valve comprises a main valve outer valve sleeve, and an oil inlet, a working port and an oil return port are formed in the main valve outer valve sleeve; the main valve inner valve sleeve is installed in the main valve outer valve sleeve, and a one-way valve and a main valve element are installed in the main valve inner valve sleeve. The pilot valve comprises a pilot valve outer valve sleeve, a pilot valve inner valve sleeve and a pilot valve element. The pilot valve element is arranged in the pilot valve in a rotatable and axial translation mode, and a pair of high-pressure channel grooves are formed in the valve sleeve and the pilot valve element and used for communicating the high-pressure working oil cavity with the sensitive cavity after the pilot valve element rotates. The pilot valve element is provided with a pair of low-pressure channel grooves in the step position of the fourth valve element, the pai