Long-service-life composite bearing for combustion gas turbine

Abstract

The invention belongs to the technical field of combustion gas turbine equipment and particularly relates to a long-service-life composite bearing for a combustion gas turbine. The long-service-life composite bearing comprises a ball bearing and a thrust bearing. The thrust bearing comprises a thrust bearing bush and a thrust bearing disc, wherein the thrust bearing bush and the thrust bearing disc are mounted on a thrust bearing seat. The mean thickness of an oil film of the thrust bearing is adjusted through a first adjustment ring. The ball bearing is mounted on a ball bearing seat. The ball bearing is matched with a main elastic ring and a subsidiary elastic ring. The matching predeformation amount of the main elastic ring and the subsidiary elastic ring is adjusted and fixed through asecond adjustment ring and a check ring. The safety clearance between the thrust bearing disc and the ball bearing seat is set through a third adjustment ring. The ball bearing and the axial thrust bearing are fixed to the end face of a same flange. Compared with a common ball bearing, the maximum bearing capacity of the ball bearing can be set by designing the main elastic ring and the subsidiary elastic ring; and when the bearing load exceeds a set value, the remaining load can be borne by the thrust bearing, so that the service life of the ball bearing is greatly prolonged.

Description

Technical field: [0001] The invention belongs to the technical field of gas turbine equipment, and in particular relates to a long-life composite bearing for a gas turbine. Background technique: [0002] Due to the influence of changing working conditions, the ball bearings for gas turbines have large fluctuations in the axial load they bear within a certain range, which is not conducive to the safe operation of the bearings, and the large-scale fluctuations in the axial force are likely to cause a series of vibrations and noises The problem is that it is not conducive to the safe formation of the roller lubricating oil film in the ball bearing, it is not conducive to ensuring the gap between the roller and the inner and outer rings of the bearing at a stable level, and it is not conducive to the timely dissipation of the heat brought by the bearing due to the load, which will cause rolling The child fails early in the case of unfavorable heat dissipation, which greatly redu...

AI Technical Summary

Problems solved by technology

[0002] Due to the influence of changing working conditions, the ball bearings for gas turbines have large fluctuations in the axial load they bear within a certain range, which is not conducive to the safe operation of the bearings, and the large-scale fluctuations in the axial force are likely to cause a series of vibrations and noises The problem is that it is not conducive to the safe formation of the roller lubricating oil film in the ball bearing, it is not conducive to ensuring the gap between the roller and the inner and outer rings of the bearing at a stable level, and it is not conducive to the timely dissipation of the heat brought by the bearing due to the load, which will cause rolling The child will fail early in the case of unfavorable heat dissipation, which will greatly reduce the service life of the bearing

At the same time, due to the large variation range of the load, it is not conducive to the selection of bearings, and it is not conducive to considering the combined life benefits of bearings under high and low loads

Images