Multi-objective optimization design of low-power-driven, large-flux, and fast-response three-stage valve

Abstract

Solenoid valves in coal mining equipment are driven by intrinsically safe solenoids. The low power consumption of these solenoids limits the response time of the solenoid valves. Additionally, the low viscosity and high susceptibility to dust contamination of the emulsion fluid often leads to leakage and sticking of hydraulic valves. To address these issues, this study proposes a low-power-driven, large-flux, fast-response three-stage valve structure with an internal displacement feedback device. The driving power of this structure is less than 1.2 W. The key parameters of the valve were optimized using a novel multi-objective optimization algorithm. A prototype was manufactured based on the obtained parameters and subjected to simulation and experimental verification. The results demonstrate that the valve has an opening time of 21ms, a closing time of 12ms, and a maximum flow rate of approximately 225L/min. By utilizing this valve for hydraulic cylinder control, a positioning accuracy of ±0.15mm was achieved.