As motor machinery can, to a hydraulic oil as working medium, the machinery of the motor by the power components (e.g., hydraulic pump) can convert the pressure of the hydraulic oil can, and by the piping and the control element, by means of the implementation of components so that the hydraulic can be transformed for the mechanical energy, drive stem to complete a straight-line movement or rotation angle. Therefore, it has the advantages of fast response and piston actuator thrust of the electric actuator. However, the use of hydraulic oil, to bring the hydraulic system problems such as leakage.stainless steel pneumatic cylinders
The basic hydraulic drive system controlled by the direction of the loop, loop pressure control and flow control loop. Directional control valve circuit can be used, such as one-way valve; pressure control loop can be pressure relay, pressure reducing valve, j are sequence valve; flow control loop throttle control valve can be used. In addition, you also need some auxiliary control loop, for example, balance control loop, relief control loop pressurized and growth control loop. In order to ensure the normal operation of the electric-hydraulic actuator, usually two sets of solution
Pressure transmission oil system, a system, another set of system standby.
When the input signal increases, the driven rotor of the torque motor rotates the baffle near the nozzle instrument bellows pressure and feedback bellows pressure increase, the instrument bellows pressure increase nozzle pipe along the fulcrum, the nozzle over the cylindrical receiving opening so that the upper portion of the hydraulic cylinder pressure increases, the lower portion of lower pressure of the hydraulic cylinder, hydraulic cylinder of the stem down until the feedback spring force instrument bellows pressure balance. While the the feedback bellows pressure reduced, so that the torque motor rotor to return to the equilibrium position.flange solenoid valve
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