Simulation and Experiment on High-Speed Solenoid Valve Based on Energy Recovery Principle

In order to solve the problem that the opening response and the closing response of solenoid valve cannot be improved synchronously, a high-speed solenoid valve based on the energy recovery principle is proposed, which adopts a special high-stiffness return spring that has a small gap with the armature. It decouples the sealing force and the closing force. The kinetic energy of the armature is converted into the elastic potential energy that accelerates the armature closing process without affecting the opening process. Based on the analysis of the working principle of high-speed solenoid valve, its transient characteristics were simulated by Ansoft Maxwell and the switching response characteristics with different structural parameters were tested. The presence of both the high stiffness return spring and its gap δ could shorten the closing time by about 6ms, while the opening time is only extended by 0.3ms. The switching time can be controlled within 5ms and has more than 1 million switching times. © 2020, Editorial Department of Journal of Propulsion Technology. All right reserved.