Cause analysis of the damage of the transmission shaft center hanger:

（1） The reason for the damage of the hanger bearing is that the insufficient lubricating oil in the bearing causes the bearing wear or increased ablation, or the rubber ring around the bearing seat is in disrepair, broken or falling off for a long time, resulting in the rotating looseness of the outer diameter of the bearing and the seat hole, resulting in the pulsation of the transmission shaft of the fusion frame, resulting in the fracture of the lower part of the frame, the fracture of the bolt, the fracture of the bolt joint, etc.

（2） The parts of the transmission shaft are damaged because the front and rear transmission shafts, U-forks of universal joints, U-forks of universal joints, and keyway shafts of expansion joints are deformed, resulting in the swing deviation of the transmission shaft transmission set axis, or the field type universal joints are excessively worn or loose due to insufficient lubricating oil; Or the looseness and wear between the sliding keyway and the expansion joint groove are aggravated. As a result, the overall clearance of the transmission shaft increased, axial shimmy occurred, the central hanger was impacted for a long time, and the lower part of the hanger was broken.