Connection structure and connection method of blade and pitch bearing, and wind power generating set
A technology of variable pitch bearings and connection structures, which is applied in wind turbines, wind power generation, engines, etc., can solve problems such as bolt staggered holes, local stress concentration, blade damage, etc., and achieve the effect of avoiding bolt staggered holes and uniform stress
Active Publication Date: 2020-02-11
XINJIANG GOLDWIND SCI & TECH CO LTD
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Problems solved by technology
If the flange structure and the pitch bearing cannot be accurately aligned, not only will there be a problem of wrong bolt holes, the bolts connecting the blade will be cut off when the blade is driven by wind; it will also cause the blade root to bear uneven force. The stress acts on the blade and leads to local stress concentration, which makes the blade easy to be damaged during the rotation driven by the wind and the pitch change driven by the pitch mechanism
Method used
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[0032] Features and exemplary embodiments of various aspects of the invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by showing examples of the present invention. The present invention is by no means limited to any specific configurations and algorithms presented below, but covers any modification, substitution and improvement of elements, components and algorithms without departing from the spirit of the invention. In the drawings and the following description, well-known structures and techniques have not been shown in order to avoid unnecessarily obscuring the present invention.
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The embodiment of the invention provides a blade and variable-pitch bearing connecting structure, a connecting method and a wind generating set. The connecting structure comprises a blade and a variable-pitch bearing. The blade is connected with the variable-pitch bearing through a blade flange at the root of the blade. Two or three or more guide positioning blocks are arranged in the circumferential direction of a butt joint surface of the variable-pitch bearing at intervals, and matching holes matched with the guide positioning blocks in a one-to-one correspondence mode are formed in the blade flange correspondingly. According to the blade and variable-pitch bearing connecting structure provided by the embodiment of the invention, through the design of the guide positioning blocks and the matching holes, alignment is achieved when the blade and the variable-pitch bearing are connected, stress at the root of the blade after connection of the blade is uniform, the problem that bolt hole misalignment occurs due to alignment failure in the blade matching process is avoided, and accordingly the situation that a bolt connected with the blade is cut off during operation of the wind generating set is avoided.
Description
technical field [0001] The invention relates to the technical field of wind power generation, in particular to a connection structure and a connection method between blades and pitch bearings, and a wind power generator set. Background technique [0002] The blades of the wind turbine and the pitch bearing are connected through the flange structure. During the docking process, the flange structure and the pitch bearing need to be aligned. Due to the large size of the flange structure and the pitch bearing, it is difficult to use ordinary The centering structure aligns the two. If the flange structure and the pitch bearing cannot be accurately aligned, not only will there be a problem of wrong bolt holes, the bolts connecting the blade will be cut off when the blade is driven by wind; it will also cause the blade root to bear uneven force. The stress acts on the blade and leads to local stress concentration, which makes the blade easy to be damaged during the rotation driven...
Claims
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IPC IPC(8): F03D80/00F03D80/70
CPCY02E10/72
Inventor 冯涛李立山
Owner XINJIANG GOLDWIND SCI & TECH CO LTD