Infinitely controlled operating fluid flux can be obtained in hydraulic circuits for fluid power systems by the presence of flow control valves of proportional type before hydraulic actuators. This research introduces a detailed mathematical model for a class of pressure-compensated proportional flow control valves. The numerical values of the construction parameters for the mentioned valve were obtained from the disassembly of the valve and conducting the necessary measurements, as well as the manufacturer's technical data sheet. The static and dynamic behavior of the valve at different conditions is investigated by a simulation program constructed by the MATLAB SIMULINK package. An experimental setup was constructed to evaluate model steady-state fluid flux. The simulated steady-state valve flow rate satisfactorily agrees with the experimental results. The effect of the variation of load pressure, supply pressure, and valve construction parameters is considered. The studied parameters are downstream valve spool spring stiffness, downstream compensator spring stiffness, spring pre-compression, compensator damping hole diameter, and compensator mass. The present results indicate that the controlled flow rate increases as compensator spring stiffness or pre-compression increases and as valve spool spring stiffness decreases. Increasing the compensator damping orifice diameter leads to a decrease in the transient time. The compensator mass has no significant impact on the transient time.
 
Special Issue of AEIC 2024 (Mechanical & Chemical and Material Engineering  Session)