The main advantages of drum-shaped gear couplings are: After the drum-shaped tooth meshing tooth surface is carburized and quenched, the bearing capacity is high; the main failure mode of the drum-shaped tooth is wear. After the forced thin oil lubrication is used, the tooth surface wears a lot. The degree of wear is reduced, and the amount of wear is about 10 times that of grease lubrication. Circulating thin oil can take away the rolling heat at the end of the roll and the heat generated by the friction of the gear teeth, effectively preventing the reduction of the allowable contact stress on the surface of the gear tooth material; under normal circumstances, it will not The phenomenon of tooth breakage appears to meet the requirements of the working characteristics of the continuous rolling mill; the drum-shaped gear coupling can meet the requirements of the rolling mill for roll shifting and rolling, and it is very convenient to expand and contract; it is clean and efficient in use.The external teeth of the drum-shaped gear coupling are divided into two types of tooth shapes: straight teeth and drum-shaped teeth. The so-called drum-shaped teeth are made of external teeth into a spherical surface. The spherical surface is on the gear axis, and the tooth side clearance is larger than that of ordinary gears. Drum-shaped gear couplings can allow greater angular displacement, can improve the contact conditions of the teeth, increase the torque transmission capacity, and prolong the service life.The contact state along the tooth width when there is angular displacement.

　　The drum gear coupling has the ability to compensate for axis deviations in the radial, axial and angular directions. It has the advantages of compact structure, small turning radius, large carrying capacity, high transmission efficiency, low noise and long maintenance period. It is especially suitable for Low-speed and heavy-load conditions, such as metallurgy, mining, lifting and transportation industries, and also suitable for shaft transmission of various machinery such as petroleum, chemical, general machinery and so on.When the drum-type WGT-type drum-shaped gear coupling is in operation, the two shafts produce relative angular 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 consumption. Therefore, the WGT-type drum Gear couplings need to work in a good and sealed state.

　　The structure of the drum gear coupling is basically symmetrical.Seen from the tooth tip direction, the teeth on the outer gear sleeve are drum-shaped teeth, and the tooth thickness gradually decreases from both sides, and the teeth on the inner gear ring that mesh with it are straight teeth.Because the tooth tip and tooth surface of the external gear sleeve are arc-shaped, the entire coupling is double articulated and flexible, so that it can adapt to the larger deflection angle between the two axes.Drum gear couplings play an important role in production practice.It can compensate the angular error caused by the misalignment of the two connecting shafts, the axial and radial installation errors, and allow a certain displacement of the two shafts.