Fault monitoring device and monitoring method for simulating rotating unit gear

The invention discloses a fault monitoring device for simulating a rotating unit gear. The fault monitoring device comprises a simulation device, a monitoring device connected with the simulation device and a controller connected with the monitoring device. The simulation device comprises an axial loading device, a radial loading device, a gear box and a gear set rotationally connected in the gear box, the axial loading device is used for applying axial force to the side face of a gear in the gear set, and the radial loading device is used for applying radial force to the gear set; the monitoring device is used for monitoring the temperature of lubricating oil in the gearbox and a vibration signal of the gear set; the controller is used for obtaining the state of the gear set according to the monitoring result of the monitoring device and controlling the gear set to rotate. The diagnosis device is simple in structure and convenient to use, the state of the gear set can be obtained by monitoring the temperatur