Wind power main shaft bearing model accelerated life test method

An accelerated life test, wind power spindle technology, applied in the field of mechanical engineering, to achieve the effect of increasing the load speed, improving the efficiency of life testing, and shortening the test cycle

Active Publication Date: 2021-03-26
NANJING UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there is no company in my country that has developed a wind power spindle bearing test bench with a power above 4WM.

Method used

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  • Wind power main shaft bearing model accelerated life test method
  • Wind power main shaft bearing model accelerated life test method
  • Wind power main shaft bearing model accelerated life test method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] The material of the bearing ring and rolling body of a wind power main shaft bearing is set to G20Cr2Ni4A bearing steel, and the test parameters are shown in Table 1;

[0080] Table 1 Test prototype parameter list

[0081]

[0082] Due to the nature of the objective conditions of the test bench, it is difficult to realize the fatigue life test of the prototype, so a model with a reduced size ratio is used for research. Now p represents the physical quantity of the test prototype (prototype); m represents the physical quantity of the test model (model); this example Select the roller diameter as D m =6mm, geometric reduction ratio D m / D p is 0.1;

[0083] Customize the non-standard parts of the wind power main shaft bearing model according to the size reduction of the model as the experimental sample, ensure that the material of the test sample is the same as that of the prototype, the roughness is increased to Ra0.8 and above, the surface heat treatment process i...

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Abstract

The invention discloses a wind power main shaft bearing model accelerated life test method; according to the method, a wind power generator main shaft bearing equal proportion reduction model is takenas a test sample, and an accelerated life test of a wind power generator main shaft bearing can be equivalently realized by means of a small rolling bearing strengthening test bed. According to the method, based on the similarity criterion of an equivalent life model between a wind driven generator main shaft bearing test model and a test prototype, the problems of an electric main shaft bearingmodel accelerated life test in the aspects of test load, test rotating speed, vibration acceleration model and temperature measurement in the test, test failure judgment and test data post-processingare solved. The method solves the problem of reliability test of the wind power main shaft bearing with the power of 4 WM or more in China at present, and provides a scheme for the wind power main shaft bearing accelerated life test.

Description

technical field [0001] The patent of the present invention belongs to the field of mechanical engineering, and specifically relates to a model accelerated life test method of a wind power main shaft bearing. Using this method to test the wind power main shaft bearing can obviously shorten the test time and reduce the test cost. This method can save the test cost and at the same time ensure the reliability performance of the wind turbine main shaft bearing to be studied accurately and reasonably. Background technique [0002] The wind turbine main shaft bearing is an indispensable key component of the wind turbine, and its reliability directly affects the operation of the wind turbine. The diameter of the main shaft bearing can reach several meters, and it is usually installed at high altitude in the field, which makes its maintenance difficult and expensive, and the cost of replacing a set of main shaft bearings is immeasurable. All units suffered huge losses. Therefore, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/045
CPCG01M13/045
Inventor 陈捷金晟郭名君张浩
Owner NANJING UNIV OF TECH
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