Bearing, and variable pitch device and variable pitch method of wind generating set

Abstract

The embodiment of the invention provides a bearing. The bearing comprises an inner ring, an outer ring and multiple rolling bodies arranged between the inner ring and the outer ring and further comprises multiple horizontal ball groves and at least one rolling way groove, the rolling way grooves are formed in the first preset position in the circumferential direction of the inner ring, and are arranged on the preset position avoiding position in the circumferential direction of the outer ring, or the rolling way grooves are formed in the first preset position in the circumferential direction of the outer ring, and the horizontal ball grooves are arranged on the preset position avoiding position in the circumferential direction of the inner ring; one ends of the rolling bodies are arrangedin the horizontal ball grooves, and the other ends are in contact with the rolling way grooves. The invention further provides a variable pitch device and a variable pitch method of a wind generatingset. According to the bearing, the rated live load and the rated static load of the bearing can be improved, the service life of the bearing is prolonged, and the manufacturing cost of the bearing canbe reduced.

Description

Technical field [0001] The invention relates to the technical field of wind power generation, in particular to a bearing, a pitch device of a wind power generator set and a pitch method thereof. Background technique [0002] Rolling bearings are a kind of bearings that are widely used in light industry, heavy industry, aerospace, petrochemical, and electric power. Especially, it plays a pivotal role in key transmission parts such as pitch bearing and yaw bearing of wind turbine. [0003] However, the applicant found that the existing bearing cage used in the wind turbine generator set is designed separately, which increases the design cost on the one hand, and on the other hand easily causes the bearing to jam and damage. In addition, the bearing rated dynamic load and rated static load margin are small, and stress concentration is easy to occur. Summary of the invention [0004] In view of this, the present invention provides a bearing, a pitch device of a wind turbine generator ...

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Problems solved by technology

[0003] However, the applicant found that the separate design of the existing bearing cages used in wind power generators increases the design cost on the one hand, and easily causes the bearings to be stuck and damaged on the other hand.

In addition, the rated dynamic load and the rated static load margin of the bearing are small, which is prone to stress concentration

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