Design and Experiment of 2D Electrohydraulic High-speed On-off Valve

Jiang Haibing;Ruan Jian;Li Sheng;Zuo Xiqing;Chen Ying;Key Laboratory of E&M,Ministry of Education,Zhejiang University of Technology;College of Mechanical Engineering,Quzhou University;

Rotary electromagnet High speed on-off valve Lever-fork Dynamic characteristic

2D electrohydraulic high-speed on-off valve was a two-stage valve,which had a spool with two dimensional motions,a rotary electromagnet drove the spool to rotate by a set of lever-fork and achieve pilot function,and pressure difference pushed the spool to open or close quickly. The form of three circumferential uniformly distributed 52° blades was adopted by the rotor of rotary electromagnet. The output torque of rotary electromagnet was multiplied by five times,the rotor inertia was reduced by leverfork and the dynamic characteristics of 2D high-speed on-off valve were improved. To test the dynamic characteristics of 2D high-speed on-off valve driven by double torsion pendulum wheel and rotary electromagnet,two experimental programs of the valve were designed. The digital simulation and experimental results were quite coincide,which showed that the dynamic characteristics of 2D high-speed on-off valve were very quick; when the system pressure was 28 MPa and the valve of 6 mm diameter with spool driven by rotary electromagnet,the dynamic response time was about 18 ms,spool displacement was 0. 8 mm and the flow rate was 60 L / min.