Wind power generator blade fatigue testing device and method

Abstract

The invention discloses a wind power generator blade fatigue testing device, which comprises a testing base for fixing a blade root and a loading device for loading a blade surface, wherein the loading device comprises a driving device, a crank-link mechanism and a blade limiting device; the driving device is connected with the blade limiting device through the crank-link mechanism; and the blade limiting device is a limiting device for limiting a loading part of a to-be-tested blade to move in a specific range. The method of carrying out a fatigue test on a wind power generator blade by the testing device comprises the following steps: first, fixing the blade according in the mounting direction, and then designing relevant member dimensions according to deflection, deformation and fatigue loads; determining the loading part, debugging the loading device, and starting the driving device so that the driving device drives the crank-link mechanism, the blade and the like to reciprocate; and monitoring and controlling the blade displacement through a displacement sensor to realize blade performance testing. The wind power generator blade fatigue testing device and method have the advantages of short testing period, low testing cost, accurate and scientific testing result, and the like.

Description

technical field [0001] The invention relates to a performance testing device and a testing method of a wind power blade, in particular to a fatigue testing device and a testing method of a wind power blade. Background technique [0002] Blades are key components of wind power plants. Fatigue test is an important test in the process of design, shaping and production of wind power blades. The design life of blades is 20 years. Fatigue tests can determine whether wind power blades can work safely within the design life. [0003] During the entire service period of wind power blades, the blades are affected by various external environments and wind load combinations, and the blade loads are complex. The blade fatigue load spectrum can be obtained by calculation or by testing methods. During fatigue testing, the load must be scaled up in order to complete the test within an acceptable time. At present, the most commonly used fatigue loading methods are hydraulic loading and res...

AI Technical Summary

Problems solved by technology

At present, the most commonly used fatigue loading methods are hydraulic loading and resonance loading. Hydraulic loading is accurate and reliable, but it is expensive and the cost is too high. Resonance loading is low in cost but has large errors, and the test is not easy to control and can only satisfy one direction. load

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