| Summary: | 碩士 === 逢甲大學 === 機械工程學系 === 89 === Pressure compensated flow control valves are often used in hydraulic systems to regulate actuator velocity. Under ideal circumstance, pressure compensator maintains a constant pressure drop across the metering orifice. Therefore, the actuator velocity can be constant and controllable, regardless of load or system pressure changes. However, in practical applications, any load variations of actuators will cause force unbalance on valve balancing spool. The steady and dynamic responses of the flow control valves will affect hydraulic system behavior. Therefore, analyzing and understanding of the valve steady and dynamic behaviors is very important.
This thesis derives the mathematical model of the pressure compensated flow control valve by theoretical analysis and simulates its steady and dynamic behaviors by using a FORTRAN simulation program. For a better understanding of a valve response behavior, the effects on the behavior by the valve design parameters (spring constant, pre-compressed spring length, balancing spool mass, opening and flow coefficients of the damping orifices) are also studied.
|
|---|
