Displacement monitoring device for coupling of wind turbine generator

A wind turbine generator shaft coupling displacement monitoring device comprises a wind turbine generator transmission chain system and a displacement sensor monitoring system, the wind turbine generator transmission chain system comprises a gear box, a speed measuring fluted disc, a shaft coupling and a generator, and the speed measuring fluted disc is installed on the side of the gear box and used for detecting the initial position; an output shaft of the gear box is connected with an input shaft of the generator through a coupler; the displacement sensor monitoring system comprises a displacement sensor and a mounting bracket, the mounting bracket is connected to an input shaft of the generator, the displacement sensor is connected to the mounting bracket, and the displacement sensor is matched with the speed measurement fluted disc. The operation condition of the coupler is monitored in real time according to the displacement value, the probability that the coupler breaks down is effectively reduced, and