Fault table for simulating subway fan state and fault classification method and device

The invention discloses a fault table for simulating the state of a subway fan and a fault classification method and device. A motor, a main rotating shaft in transmission connection with the motor and a driven rotating shaft in transmission connection with the main rotating shaft through a belt are installed on the fault table. A first bearing seat, a first turn-back end of the belt, a second bearing seat and a load assembly are arranged on the main rotating shaft; a first sensor is mounted on the first bearing seat, and a second sensor is mounted on the second bearing seat; a second turn-back end of the belt, a third bearing seat, an intact gear and a fourth bearing seat are arranged on the driven rotating shaft, and the intact gear is meshed with the broken-tooth gear on the other rotating shaft; a third sensor is installed on the third bearing seat, and a fourth sensor is installed on the fourth bearing seat. According to the method, the fault table is used for obtaining the vibration signals, original si