Mechanical quick-operation type integrated electro-hydraulic actuator
An electro-hydraulic actuator, integrated technology, applied in mechanical equipment, fluid pressure actuation device, fluid pressure actuation system components, etc., can solve the steam turbine accident, the security oil of the steam turbine does not work, and the valve speed cannot be realized. Problems such as closing or opening to achieve the effect of improving reliability and reducing renovation costs
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[0009] The piston rod 12 of the single-acting hydraulic cylinder 1 is connected to the emergency button 21 of the solenoid valve 2; the single-acting hydraulic cylinder means that one cavity of the hydraulic cylinder is provided with a return spring 11, and the other cavity is set with a hydraulic pressure equal to 0.3MPa The low-pressure safety oil 13; the connection direction is limited to the single-acting hydraulic cylinder piston rod retracted, the return spring is compressed when the solenoid valve is in the cut-off state. Under normal conditions, the single-acting hydraulic cylinder presses the return spring under the action of the said low-pressure safety oil pressure, the piston rod retracts, the solenoid valve is in the cut-off state, the rapid action circuit is disconnected, and the double rod cylinder 3 is in the normal operation circuit Under the control of 4, the opening of the steam valve is adjusted to realize the control of the load or speed of the steam turbine...
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