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

A technology for wind turbines and bearings, which is applied in the control of wind turbines, wind turbines, and wind power generation. It can solve the problems of increased design costs, small static load margin, and bearing stagnation, and achieves increased rated dynamic loads and improved Rated static load, the effect of avoiding stress concentration

Pending Publication Date: 2019-05-10
BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD
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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

Method used

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

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Embodiment Construction

[0055] Hereinafter, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure, and to fully convey the scope of the present disclosure to those skilled in the art.

[0056] figure 1 The structure of the related art bearing is shown. Such as figure 1 As shown, the bearing is composed of an outer ring 1, an inner ring 4, rolling elements 2 and a cage 3. According to the different characteristics of the pitch of the wind turbine, it is divided into 4 pitches in the inner ring and 1 pitch in the outer ring. For the pitch bearing with the pitch of the inner ring 4, the inne...

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/02F03D80/00F16C19/18F16C19/38F16C33/58F16C33/66
CPCY02E10/72Y02P70/50
Inventor 乔利军方涛
Owner BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD
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