A model accelerated life test method for wind power main shaft bearings

An accelerated life test, wind power spindle technology, applied in the testing of mechanical components, testing of machine/structural components, instruments, etc., to achieve the effect of reducing test cost, shortening test cycle, and increasing load speed

Active Publication Date: 2022-03-11
NANJING TECH UNIV +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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  • A model accelerated life test method for wind power main shaft bearings
  • A model accelerated life test method for wind power main shaft bearings
  • A model accelerated life test method for wind power main shaft bearings

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 table

[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 ...

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Abstract

The patent of the present invention discloses a model accelerated life test method of a wind power main shaft bearing. The method uses a scale-down model of a wind power generator main shaft bearing as a test sample, and the wind power generator main shaft bearing can be equivalently realized by means of a small rolling bearing strengthening test bench. Accelerated life testing. This method is based on the similarity criterion of the equivalent life model between the wind turbine main shaft bearing test model and the test prototype. Judgment and test data post-processing problems are solved. The proposal of this method solves the difficult problem of the reliability test of wind power main shaft bearings with power above 4WM in my country, and provides a solution for the accelerated life test of wind power main shaft bearings.

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 Patents(China)
IPC IPC(8): G01M13/045
CPCG01M13/045
Inventor 陈捷金晟郭名君张浩
Owner NANJING TECH UNIV
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