Static test method of horizontal shaft wind turbine vane scale model based on equal strength principle

A technology of wind turbine blades and testing methods, applied in the testing of mechanical components, testing of machine/structural components, measuring devices, etc., to achieve the effects of economical equipment investment, accurate acquisition, and low cost

Active Publication Date: 2013-07-10
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

[0005] In view of the above problems of the existing blade static test, this patent proposes a blade static performance test evaluation method that uses the blade scale model static test test instead of the full-scale blade static test

Method used

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Embodiment Construction

[0031] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific examples.

[0032] In this embodiment, taking the current mainstream MW-level wind turbine blades as an example, the following steps are used for detection:

[0033] 1) According to the structural characteristics of the prototype blade to be evaluated, design and manufacture a blade whose structural size is reduced in proportion, and use this blade as the test blade. In this example, the reduction ratio is set to 10;

[0034] 2) According to the principle of equal strength (that is, the reduced-scale model blade and the prototype blade should maintain the same structural stress distribution under their respective test loads), the test load of the prototype blade is converted into the test load of the reduced-scale model blade. The steps are as follows:

[0035] (a) Using the finite ...

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Abstract

The invention discloses a static test method of a horizontal shaft wind turbine vane scale model. The method aims at replacing a full-size vane static test experience through a low-cost and high-efficiency scale model experience detection and computational analysis mode. The method is characterized in that a static test experience of the vane model is adopted to replace the traditional full-size vane static test experience, vanes of the vane model are narrowed in size with an equal proportion, and an experience load of the scale model can be confirmed according to the requirement that the scale model and prototype vanes meet equal strength of the structure. According to the test method, not only are currently-used vane static test devices adopted, but also low-cost small-type test devices and equipment can be adopted to conduct the static experience. Through accurate design and numerical calculation, the scale model and the full-size vanes can have a relatively accurate structural size corresponding relation and a load corresponding relation, and accuracy of test results can be achieved.

Description

technical field [0001] The invention relates to the technical field of wind power generation in the machinery industry, in particular to a method for testing and evaluating the structural performance of a horizontal axis wind turbine blade under static load. Background technique [0002] The damage and failure of wind turbine blades under extreme load is an important concern in the design, manufacture and operation of wind turbine blades. In the design of wind power blades, it is generally required that the wind power blades can meet the service life of 20 years. In such a long service period and harsh working environment, wind turbines often have to operate under a variety of extreme loads, which seriously affects the reliability and service life of wind turbines in safe operation. However, the harsh working environment, special material properties, and various problems brought about by the structure and process bring considerable difficulty to the performance evaluation o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/00
Inventor 石可重徐建中
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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