先导式大流量伺服球阀设计与仿真分析OA

The adjustment of hydraulic support posture and the straightening of scraper conveyors in underground coal mining require the operation of hydraulic cylinders through hydraulic valves.Currently,the commonly used switch valve groups often struggle to achieve precise adjustments.Additionally,the unique underground environment imposes strict requirements on the volume,pressure,flow rate,and working medium of hydraulic valves.To address these issues,a pilot-operated large-flow servo ball valve is proposed,and its simulation characteristics are analyzed and experimentally verified.The simulation results indicate that the ball valve can achieve multi-channel flow regulation and on/off control with a large flow rate.It also features a pilot control function,enabling follow-up control of the main valve and pilot valve.The main valve opening of the ball valve can be adjusted in three stages within the angle range of 5°to 37°,and the flow rate can be regulated in three stages,with flow rates of 102,295,and 602 L/min,respectively.Furthermore,the ball valve can achieve driving control at a low power of 4 MPa,meeting the requirements of long-distance and large-flow liquid supply scenarios for mining hydraulic equipment.