Spherical roller bearing and wind turbine main shaft transmission chain system comprising same

Abstract

The invention discloses a spherical roller bearing. The spherical roller bearing comprises a bearing outer ring, a bearing inner ring, a holder and spherical rollers, wherein the holder is arranged between the bearing outer ring and the bearing inner ring and provided with two columns of pockets and spherical rollers arranged in the pockets of the holder, an asymmetric spherical raceway is arranged on the inner side of the bearing outer ring, the asymmetric spherical raceway is a circular arc spherical surface whose spherical center of a circle and center of the bearing are not coincident. The bearing inner ring and the holder are both arranged into asymmetric structures corresponding to the asymmetric spherical raceway of the bearing outer ring. The invention also discloses a wind turbine main shaft transmission chain system, and the main shaft transmission chain comprises the spherical roller bearing. According to the spherical roller bearing, the spherical roller bearing with the asymmetric structure is adopted by changing the inner structure of a bearing; under the precondition that the aligning function of the bearing is not lost, load distribution is adjusted when the bearing is loaded; and thus the problem that one-side loading is over large is avoided, and service life of the bearing is efficiently prolonged.

Description

technical field [0001] The invention relates to the technical field of bearings, in particular to a self-aligning roller bearing and a main shaft transmission chain system of a wind power generating set including the bearing. Background technique [0002] There are many structures used in the main shaft drive chain system of wind turbines, among which the double bearing system is a widely used structure, and spherical roller bearings are used as the support system of the double bearing structure is a common selection in the wind power industry. In this double bearing system, the floating bearing near the impeller only bears radial loads, and the thrust bearing near the generator end bears all axial loads and part of radial loads. [0003] Studies have shown that due to the influence of axial load on the thrust bearing in use, the load on the side of the thrust bearing that bears the axial load (including axial load and radial load, where the radial load is the main load) is ...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a self-aligning roller bearing, which can rationally optimize the load distribution of the bearing during loading without losing the self-aligning function, and alleviate the problem of excessive load on one side of the bearing. Effectively improve the service life of bearings, thereby overcoming the shortcomings of existing spherical roller bearings

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