Drum-shaped gear coupling is composed of internal gear ring with the same number of teeth and flange half coupling with external teeth.The external teeth are divided into straight teeth and drum teeth. The so-called drum teeth means that the external teeth are made into a spherical surface. The spherical surface is on the gear axis. The tooth side clearance is larger than that of ordinary gears. Drum-shaped gear couplings allow Larger angular displacement can improve the contact conditions of the teeth, increase the torque transmission capacity, and prolong the service life.When the drum-shaped gear coupling is working, the two shafts produce relative displacement, and the tooth surfaces of the inner and outer teeth periodically slide relative to each other in the axial direction, which will inevitably cause tooth surface wear and power loss. Therefore, the drum-shaped gear coupling requires Work in a well-lubricated and sealed state.

　　The torsional vibration of the drum-shaped gear coupling is analyzed and researched. The torsional vibration of the shaft system of the drum-shaped gear coupling is analyzed using the Fourier number solution method, with clearance, damping, and excitation force as parameters. Non-linear analysis; a large number of experiments have been carried out on the axial vibration of the gear coupling connecting shaft system, and the main reason for the axial vibration is qualitatively explained. It is pointed out that the axial vibration is mainly due to the misalignment and the frictional force of the tooth surface. As a result, when there is no axial restoring force or thrust bearing, greater axial movement will occur.

　　Vibration analysis is one of the techniques for predicting coupling misalignment. It can judge the gradual change trend of the equipment state, but when judging whether a piece of equipment is in a misalignment state, it needs to have a lot of past data and examples for reference, and there are differences. The problem is the bearing, lubricating oil, coupling, or the fixed connection, so there are certain limitations.Infrared photography technology can distinguish overheated parts such as bearings, motor housings, couplings, etc. when the equipment is in poor condition, and determine the alignment error of the coupling, and combine it with other prediction technologies such as vibration analysis. , Its effect will be better.