Uniform load sliding bearing

Abstract

The invention discloses a uniform load sliding bearing. The uniform load sliding bearing comprises an inner spherical surface bearing bush and an outer spherical surface bearing bush; and the inner spherical surface bearing bush and the outer spherical surface bearing bush form spherical surface fit, and a stiffness reduction groove is formed in an inner spherical surface of the inner spherical surface bearing bush. Through increase of the curvature radius of the inner spherical surface of the inner spherical surface bearing bush matched with the outer spherical surface bearing bush and lubricating oil stored in the stiffness reduction groove, deflection of the bearing bushes along with a shaft neck is facilitated, frictional resistance during deflection of the bearing bushes is reduced, and clamping between the uniform load sliding bearing and the bearing bushes during deflection of the bearing bushes is omitted; a saddle-shaped axial gap is formed between the bearing bushes and the shaft neck, the oil film pressure and the bush temperature of the middle portion of the bearing bushes are decreased, and the safety and the reliability of the service of a unit are improved.

Description

technical field [0001] The invention belongs to the technical field of sliding bearings, in particular to a load balancing sliding bearing. Background technique [0002] During the operation of the sliding bearing, due to the static deflection of the rotor due to its own gravity and the misalignment of the installation, the centerline of the journal and the centerline of the bearing do not coincide, resulting in deflection in the axial direction, causing the support bearing and journal Axial rubbing occurs; and during operation, the oil film pressure of the bearing is asymmetrical along the axial direction, so that the temperature sensor installed in the middle of the axial position of the bearing cannot capture the highest bush temperature of the bearing bush, so the health status of the bearing cannot be accurately monitored . For thrust-supported combined bearings, the deflection of the journal affects the load distribution of each thrust pad, and then the temperature ri...

AI Technical Summary

Problems solved by technology

[0002] During the operation of the sliding bearing, due to the static deflection of the rotor due to its own gravity and the misalignment of the installation, the centerline of the journal and the centerline of the bearing do not coincide, resulting in deflection in the axial direction, causing the support bearing and journal Axial rubbing occurs; and during operation, the oil film pressure of the bearing is asymmetrical along the axial direction, so that the temperature sensor installed in the middle of the axial position of the bearing cannot capture the highest bush temperature of the bearing bush, so the health status of the bearing cannot be accurately monitored

For thrust-supported combined bearings, the deflection of the journal affects the load distribution of each thrust pad, which in turn causes the temperature rise of the heavily loaded thrust pad to be too high

In order to make the bearing bush follow the deflection of the journal so as to ensure the centering of the journal and the bearing, the support bearing or the thrust support joint bearing, a structure with a spherical pair is often used at present. The characteristic of this structure is that the mating surface of the bearing bush is an outer spherical surface and The mating surface of the bushing supporting the bearing bush is an inner spherical surface; the disadvantage is that the bushing is constrained by the bearing seat, and the radius of curvature changes little after being stressed; due to the high rigidity of the bearing bush, the radius of curvature changes little after being stressed

Therefore, in actual work, it often occurs that the pad body and the pad sleeve are jammed, and the accurate alignment between the journal and the pad body cannot be maintained, thereby affecting the bearing capacity.

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