Rotary shaft support structure

Abstract

The present invention addresses the problem of providing a rotary shaft supporting structure which is capable of supporting a rotary shaft for a longer period. This rotary shaft supporting structure, which supports a rotary shaft on which a thrust collar that protrudes outwards in the radial direction is formed, has: thrust bearings which face the thrust collar, and support, using support surfaces, the thrust collar surfaces that are orthogonal to the axial direction of the rotary shaft; and support mechanisms which support the thrust bearings in the axial direction from the surface side of support surfaces at the opposite side to the thrust collar. The sides of the support mechanisms that face the end surfaces of the thrust bearings are inclined in the direction orthogonal to the direction in which the rotary shaft tilts.

Description

technical field [0001] The present invention relates to a rotating shaft support structure that supports a rotating shaft in a thrust direction. Background technique [0002] A rotating machine such as a gas turbine or a steam turbine is a mechanism that rotates a rotating shaft. In such a rotating machine having a rotating shaft, a thrust bearing is provided in order to receive a thrust and restrict a position in a direction parallel to the rotating shaft in the thrust direction. In addition, the thrust bearing may be provided with a mechanism for adjusting the mounting position. [0003] Here, Patent Document 1 describes that an adjustment bush is provided between the thrust bearing and the housing to be assembled to adjust the mounting position with respect to the housing. [0004] prior art literature [0005] patent documents [0006] Patent Document 1: Japanese Unexamined Patent Publication No. 2002-70853 [0007] However, the purpose of the adjusting bush is to a...

AI Technical Summary

Problems solved by technology

Therefore, the load on the contact surface between the thrust bearing and the rotating shaft becomes uneven, and a larger load may act locally on the contact surface than on other parts.

If the local load on the thrust bearing increases and the thrust bearing is damaged and cannot support the rotating shaft, there is a concern that rotating machines such as gas turbines and steam turbines will not be able to operate.

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