Simulation Analysis and Optimization Design of Pilot-operated Proportional Directional Valve

High-performance pilot-operated proportional directional valves, as critical foundational components in China's manufacturing industry, hold significant importance. However, these valves, widely utilized across various sectors in China, are predominantly monopolized by companies such as Bosch Rexroth from Germany and Atos from Italy. This monopoly situation has led to constraints on China's autonomous development in terms of technology, pricing, supply cycles, and other aspects, posing a bottleneck problem for the independent development of many major equipment in China. In addressing pilot-operated proportional directional valves, a comprehensive design of proportional valves is undertaken. Simulation and optimization analyses are conducted on proportional valves with different shapes of throttle slots to explore the impact of various slot shapes on the valves. Main valve flow validation is performed, and dynamic and static characteristics analyses are carried out on the proportional valves. Structural optimization of the valves is conducted using orthogonal experiments, and an acceleration test load spectrum is compiled based on the actual usage conditions of the proportional valve product.