Electric hydraulic active clearance self-adaptive mechanism for labyrinth sealing

The invention provides a labyrinth sealing electric hydraulic active clearance self-adaptive mechanism. The labyrinth sealing electric hydraulic active clearance self-adaptive mechanism comprises an eddy current sensor front-end device, a current amplifier, an engine main shaft, a labyrinth sealing piece and a static casing, wherein the labyrinth sealing piece and the static casing are sequentially connected outside the engine main shaft in a sleeving mode. A plurality of voltage type eddy current sensors are arranged on the labyrinth sealing piece, a plurality of mounting grooves are formed in the static casing, and a micro motor and a micro hydraulic pump are arranged in each mounting groove. Changes of a gap between the main shaft of the engine and a rotor during eccentric rotation are converted into voltage signals, the voltage signals are converted into current through the eddy current sensor preposition device, the micro motor is driven to rotate to provide supporting power for the micro hydraulic pump,