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Method for determining position and polishing amount of variable-pitch bearing soft belt of wind turbine generator

A technology for pitch bearings and wind turbines, applied in electrical digital data processing, computer-aided design, special data processing applications, etc., can solve complex forces, different deformation of pitch bearings, and unreasonable determination of the amount of soft belt grinding, etc. problems, to achieve reasonable and accurate results

Pending Publication Date: 2021-02-05
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented method helps predict when there will be damage or failure during operation without having to replace parts that may have been damaged beforehand. It also makes it easier to determine if any issues with the rotating part can still work properly even after being installed on an aircraft's main shaft due to factors like vibrations caused from flight operations such as fluctuation in air pressure or changes over time (wear).

Problems solved by technology

This technical problem addressed in this patented describes how to accurately locate and measure the location of the inner parts (pitch) inside the pitch bearer without causing any harm during rotation due to strong forces such as torsion).

Method used

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  • Method for determining position and polishing amount of variable-pitch bearing soft belt of wind turbine generator
  • Method for determining position and polishing amount of variable-pitch bearing soft belt of wind turbine generator
  • Method for determining position and polishing amount of variable-pitch bearing soft belt of wind turbine generator

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Embodiment 1

[0025] A method for determining the position and grinding amount of the soft belt of the pitch bearing of a wind turbine. The blade, the hub and the pitch bearing are connected by bolts to form a finite element model of the pitch bearing connection system. The center of the blade root is tied to the upper end surface of the blade prosthesis. Fixed, the blade root load is applied to the center of the blade root, constraining the z-direction freedom of the main shaft end face and the blade heel center point, while using rotational symmetry to constrain the 1 / 3 end face of the hub body.

[0026] Using the finite element model analysis and calculation of the pitch bearing connection system, the deformation of the bearing under various load conditions is obtained. In this embodiment, a nonlinear spring unit is used to simulate the load-deformation relationship between the bearing ball and the raceway, as shown in figure 1 As shown, the four points O where the ball contacts the racew...

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Abstract

A method for determining the position and polishing amount of a variable-pitch bearing soft belt of a wind turbine generator comprises the steps that a finite element model of a variable-pitch bearingconnecting system is set, and the deformation amount of a variable-pitch bearing under different limit loads and the deformation amount of the variable-pitch bearing under different fatigue loads arecalculated according to the model; and finally, the soft belt position and the polishing amount are determined according to the two sets of deformation amounts. The deformation of the bearing under the limit load and the deformation of the bearing under the fatigue load are calculated by establishing the finite element model of the variable-pitch bearing connection system, and the placement position of the soft belt and the polishing amount of the soft belt are determined by considering the deformation under two different loads, so that the obtained result is more reasonable.

Description

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Claims

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Application Information

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Owner CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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