Repairing method for loosening of bearing of tail transmission shaft of helicopter

Abstract

The invention relates to a repairing method for loosening of a bearing of a tail transmission shaft of a helicopter. A bearing loosening and wear repairing standard is offered, curing methods such asa normal temperature method are adopted, damaged paint layers in the bearing repairing process are repaired, and the repaired tail shaft can continue to be put into use. The repairing method is put into use for many years in removing loosening faults of bearings of tail shafts of helicopters with a certain model, the repaired bearings of the tail shaft has a good working state in an external field, and bearing loosening problems are not fed back anymore.

Description

technical field [0001] The invention relates to a repair method for a loose bearing, in particular to a repair method for a loose bearing of a tail drive shaft of a helicopter. Background technique [0002] A bearing is installed on the tail shaft of the helicopter, the inner ring of the bearing cooperates with the tail shaft tube, and the outer ring of the bearing cooperates with the damping rubber bushing to eliminate the vibration of the tail shaft during operation. The two ends of the tail shaft are flange structures, and the maximum outer diameter of the flange is larger than the inner ring of the bearing. Therefore, when installing the tail shaft, the bearing must be installed first, and then the flange. At the same time, the tail shaft is composed of multiple sections of aluminum tubes, and the aluminum tubes are connected by riveting, so the bearings on the tail shaft cannot be disassembled. Due to the influence of working conditions, when the tail shaft starts to w...

AI Technical Summary

Problems solved by technology

At the same time, the tail shaft is composed of multiple sections of aluminum tubes, and the aluminum tubes are connected by riveting, so the bearings on the tail shaft cannot be disassembled

Due to the influence of working conditions, when the tail shaft starts to work, the bearings often loosen

After the bearing is loose, if it is not repaired in time, it will cause a large vibration of the tail shaft and accelerate the wear of the tail shaft, which will affect the safety of the whole machine in severe cases

Since the bearing on the tail shaft cannot be disassembled, and there is no feasible repair method in the early stage, when the tail shaft bearing becomes loose, the entire tail shaft is forced to be scrapped, causing a lot of waste