Design and Simulation of High Water Base Large Flow Proportional Speed Regulating Valve Driven by High Speed On-off Valve
In the intelligent fully mechanized mining face production,the hydraulic support often encounters unstable load in moving and sliding process.The traditional switch type electro-hydraulic control element cannot control the sliding oil cylinders'speed which makes the sliding oil cylinders'position control a difficulty,affecting the scraper straightness and the application efficiency of intelligent fully mechanized mining equipment.To solve this problem,considering coal mine emulsion medium's low viscosity and poor lubricity,a high water base high pressure large flow proportional speed regulating valve with high speed on-off valve as pilot valve is designed.The valve's mathematical and AMESim simulation model is built according its internal structure and working principle.The simulation of the closed-loop control characteristics of the throttle valve spool position and the differential pressure-flow characteristics of the speed-regulating valve is conducted.The simulation results show that the A-type pilot hydraulic bridge has a better response performance to the main valve spool,and main valve lower control chamber's volume and the reset spring stiffness have a certain influence on the valve spool's response speed and stability.In general,the speed regulating valve has better flow regulation stiffness,and the function and performance meet the expected design requirements.
万方数据
维普
