Rotating joint durability testing principle and full-automatic testing machine

A rotating joint durability testing principle and a full-automatic testing machine are applied in the technical field of engineering mechanical test. The full-automatic testing machine comprises a hydraulic loading system, a servo motor driving system and a programmable Logic Controller (PLC) system. During the operation of a rotating joint, the hydraulic loading system input hydraulic oil with rated pressure in an oil channel of the rotating joint, then the servo motor driving system enables the rotating shaft and the casing of the rotating joint to rotate relatively, and adjusts the rotating speed, the rotating direction and the rotating angle of the relative rotation, and finally the PLC measuring and controlling system controls the gain and loss of electricity of electromagnetic valves and the operation of the servo motor, automatically measures the oil temperature, the oil flow quantity, the oil pressure, the driving torque and the rotating speed of the rotating joint, processes signals and displays collected data in real time. The rotating joint durability testing principle and the full-automatic testing machine can simulate the actual working condition of the rotating joint, and research the tightness of the rotating joint sealing member, effects of temperature towards the driving torque and the strength of rotating joint parts under the pressure in the process of 2000-hour running.