Electromagnet-driven digital hydraulic servo actuator

The invention discloses an electromagnet-driven digital hydraulic servo actuator. A hydraulic power unit in the electromagnet-driven digital hydraulic servo actuator is composed of an electromagnet, a piston, a cone valve, a cylinder body and the like. The electromagnet moves to drive the piston to move, thereby pressurizing the hydraulic oil; and the extruded hydraulic oil provides power for the actuator. The oil duct of the actuator is provided with a bidirectional hydraulic lock, thereby preventing the actuator from losing control due to power cut and other reasons in the working engineering. An energy storage device on the mechanism oil duct stores energy in the extending stroke process, and releases the energy in the return process, thereby implementing the quick-return motion of the actuator. A servocontrol unit comprises a displacement sensor, which is installed on the actuator and used for feeding the speed and displacement of the actuator back to a control system; and the control system sends out a corresponding control signal, thereby implementing digital servo control. By using the integrated hydraulic power unit as a power source, the electromagnet-driven digital hydraulic servo actuator has the advantages of small size and high thrust, has flame resistance after being sealed, can easily implement digital servo control, and can control the cost on a lower level.