Sea depth self-adaptive water hydraulic flat plate type servo valve

The invention discloses a sea depth self-adaptive water hydraulic flat plate type servo valve, and belongs to the technical field related to servo valves. Comprising a pilot mechanism, a valve body mechanism and a displacement sensor mechanism, the two ends of a valve element in the valve body mechanism are cylinders, the middle part of the valve element is a cuboid, and a rectangular hollow groove is formed in the middle part and is in clearance fit with a valve sleeve; a rectangular runner groove and a round hole are formed in the front end face of the flat valve and used for being communicated with the through-flow opening of the front end cover, and the front end face of the flat valve is attached to the rear end face of the front end cover; a disc spring is arranged between the rear end face of the pressing cylinder and the rear end cover and makes close contact with the pressing cylinder, the disc spring and the pressing cylinder form pre-pressure, the front end face of the flat valve and the rear end f