Method for detecting abnormal operation of rolling mill transmission equipment

The invention relates to a method for detecting abnormal operation of rolling mill transmission equipment, and belongs to the technical field of automatic control of metallurgical equipment. Accordingto the technical scheme, the output torque of a variable frequency cabinet is equal to the working torque of a load in the stable working state, and the load torque is equal to the sum of the workingtorque of a rolling mill and the torque loss from a motor to a middle transmission link of the rolling mill; when the rolling mill and the transmission middle link thereof are abnormal, the amplitudeand change rate of the output torque of the variable frequency cabinet are changed; whether the transmission equipment works properly or not is judged by a programmable logic controller through real-time detection of the amplitude change and change rate of the output torque of the variable frequency cabinet; and if the transmission equipment works abnormally, an alarm message is sent through an HMI computer. According to t