Two-dimensional electro-hydraulic servo valve based on dry-wet separation transmission mechanism

The invention provides a two-dimensional electro-hydraulic servo valve based on a dry-wet separation transmission mechanism. The two-dimensional electro-hydraulic servo valve comprises a valve body, and the valve body is connected with a motor through a mechanical transmission mechanism; the valve body comprises a valve element, a valve sleeve and a valve body. The mechanical transmission mechanism comprises a shell arranged between the valve body and the motor, a wet type operation cavity and a dry type operation cavity are formed in the shell, and the wet type operation cavity is communicated with an oil way in the valve body. The dry-type operation cavity is arranged on one side of the wet-type operation cavity, and a rotor of the motor extends into the dry-type operation cavity; the mechanical transmission mechanism further comprises a transmission assembly. The transmission mechanism comprises a first-stage torque amplifying mechanism and a second-stage torque amplifying mechanism which are connected. Th