Self-locking device of impeller lock

The utility model discloses an impeller lock self-locking device which comprises a machine frame, an impeller is installed on the machine frame in a rotating mode, an impeller locking mechanism is installed on the machine frame, a U-shaped groove is formed in the impeller locking mechanism, cavities are formed in the inner walls of the two sides of the U-shaped groove, and in the rotating process of the impeller, the impeller is locked in the U-shaped groove. When the first sensor and the second sensor are in a parallel state, a travel switch is triggered, two hydraulic telescopic rods are started, two brake pads are driven to get close to each other to brake the impeller, the impeller is locked, a locking hole corresponding to the second sensor corresponds to a locking pin on the impeller locking mechanism, a servo motor is started, and the impeller is locked. And meanwhile, the two hydraulic telescopic rods drive the two brake pads to reset, braking on the impeller is relieved, the purpose of locking the im