Research on Pilot Type Constant Control Pressure Hydraulic Balancing Valve
Under the condition of large flow rate,the direct acting balancing valve has the problems of high control pressure,poor working stability and large valve body size,so a pilot type constant control pressure hydraulic balancing valve is proposed.By analyzing the working principle of the balance valve,the new structure of the pilot valve spool opening is inversely proportional to the change of load,and the main valve spool opening is proportional to the change of flow.The static and dynamic performance analysis was carried out using Simulink tool in MATLAB.The results showed that the back pressure of the designed balance valve could automatically adapt to the changes of load and flow in the range of load pressure from 3～32 MPa and flow rate from 80～120 L·min-1.Moreover,the system can stabilize the control pressure at 0.95～1.07 MPa within 0.3 s.The designed pilot type constant control pressure hydraulic balancing valve has low constant pressure and high stability,which can provide reference for energy saving research of balancing valve.
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