Device and method for testing structural fatigue of H-shaped vertical shaft wind turbine blade

A technology for wind turbine blades and fatigue testing, which is applied in the testing of machine/structural components, measuring devices, and testing of mechanical components. Adaptability, accurate and reliable results, simple and convenient operation

Active Publication Date: 2015-07-22
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In actual operation, the force of the blade is more complicated. The wind load and inertial load make the blade bear various stress forms such as bending and torsion, and the blade has a certain angle of attack, which makes the analysis of the structural fatigue performance of the blade more difficult.

Method used

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  • Device and method for testing structural fatigue of H-shaped vertical shaft wind turbine blade
  • Device and method for testing structural fatigue of H-shaped vertical shaft wind turbine blade
  • Device and method for testing structural fatigue of H-shaped vertical shaft wind turbine blade

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Embodiment Construction

[0024] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0025] Take the double-bearing blade as an example, such as figure 1 As shown, the H-shaped vertical axis wind turbine blade structure fatigue test device of the present invention includes a support component 1, a loading hoop 2, a primary distribution beam 3, a secondary distribution beam 4, a supporting link 5, and an eccentric motor 6. . The first-level distribution beam 3, the second-level distribution beam 4, the loading hoop 2 and the support connecting rod 5 are bolted to form the entire load distribution system, which is used to transmit and distribute the fatigue load acting up and down; in the middle of the first-level distribution beam 3 An eccentric motor 6 is provided, and the eccentric motor 6 is used to provide fatigue loads acting u...

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Abstract

The invention relates to a device and a method for testing the structural fatigue of an H-shaped vertical shaft wind turbine blade. The device comprises a support base component, a distribution beam, a loading hoop, a support connecting rod and an eccentric motor, wherein the distribution beam, the loading hoop and the support connecting rod are connected together by using bolts so as to form a whole load distribution system, so that the fatigue load which acts in an upper and lower reciprocation manner can be effectively conducted. When the device is used for experiment, the fatigue bending moment distribution of the blade under various working conditions can be simulated by adjusting the length L of the distribution beam and the position B of the loading hoop, and the fatigue stress state of the blade in axial torsion and multiple attack angles can be simulated by adjusting the structural modes of the support base component and the loading hoop; the strain distribution of the blade under the fatigue loaded condition can be measured, and furthermore, the fatigue structural property of the blade can be evaluated; by only exerting one external fatigue load to the device, combined fatigue loading modes such as bending, torsion and multiple attack angles of the blade can be achieved, and the device is simple and convenient to operate, accurate and reliable in result and relatively high in universality.

Description

Technical field [0001] The invention relates to a fatigue structure test device and method, in particular to a fatigue structure test device and method of a large H-shaped vertical axis wind turbine blade. Background technique [0002] The wind turbine device of a large H-shaped vertical axis wind turbine is composed of blades, a bracket and a main shaft. The bracket is used to connect the blades and the main shaft to form a large H-frame structure with a certain rigidity. Common frame structures include single-frame and double-frame structures. Two types. The blade is a key component of a wind turbine, and its design service life is generally 20 years. Fatigue damage is one of the important reasons for blade damage. Its fatigue performance is related to the safety and stability of the entire unit. In order to ensure the bearing capacity and strength of the blade under fatigue load, it is necessary to carry out structural fatigue tests on the blade to determine the fatigue perfo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/00
Inventor 陈啸唐荆
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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