Simulation and Parameter Optimization of Pilot Internal Flow Overflow Valve

Aiming at the pilot internal overflow valve, the working principle is introduced, and the simulation model is established by AMESim. The pre-compression force of pilot spring is calculated by NLPQL. The influence on the dynamic characteristics of the pilot spring stiffness, damping hole diameter, the diameter of main valve core is analyzed by batch processing. Then the Genetic Algorithm(GA) is used to obtain optimal valve of structural parameters, which can provide a theoretical basis for dynamic characteristics.