Rotating device of fuel nozzle test bench and working method thereof

The invention discloses a rotating device of a fuel nozzle test bench and a working method thereof, which meet the requirements of high efficiency and safety of a fuel nozzle test. The device comprises a mounting bracket, and a motor and a hydraulic rotating joint which are arranged on the mounting bracket, wherein the hydraulic rotating joint comprises an outer ring and an inner ring which is rotatably arranged in the outer ring; the outer ring is fixed on the mounting bracket; the inner ring is in transmission connection with the motor; the inner ring is fixedly connected with a rotating support; the rotating support is fixedly connected with a nozzle tool; and an output shaft of the motor, the inner ring, the rotating support and a nozzle oil injection hole of the nozzle tool are coaxially arranged; the outer ring is provided with a fuel oil inlet; the inner ring is provided with a hydraulic pipeline communicated with the fuel oil inlet; and the rotating support is communicated between the hydraulic pipeli