Static strength test method of large vane used for wind power and electrical power and test system thereof

Abstract

The invention discloses a static strength test method of a large vane used for wind power and electrical power and a test system thereof. The test method comprises the following steps: keeping the vane flat, fixing one end of the root of the vane through a fix support of the test system, vertically loading the vane with a crane, wherein the loading mode is as follows: single point loading through the crane is converted into multi-point loading through a load distributing beam; and then, transmitting the multi-point loading to the vane through a vane loading clamp. The lifting point of the crane, the load distributing beam and the vane loading clamp are connected together through slings provided with load sensors, a strain piece and a displacement sensor are arranged on the vane, and stress, shape change and displacement data information respectively collected from the loading process are used for determining whether the static strength of the vane meets the requirements of design or not. The test method of the invention has the advantages of low area limit, low test cost, convenient process operation and accurate test result; and the test system of the invention has the advantages of simple manufacturing, convenient assemble, low cost and long service life.

Description

technical field [0001] The invention relates to a static strength test method and a test system for a blade of a wind power generator, in particular to a static strength test method and a test system for a large blade of a wind power generator. Background technique [0002] In wind power equipment, the blades of wind turbines are extremely important key components, and their performance directly determines the power and service life of the generator set. In order to reduce the cost of wind power generation, the wind power industry has higher and higher requirements for the capacity of a single unit, and for every 6% increase in blades, the captured wind energy can increase by 12%, so the blades used in wind power generators are also developing in the direction of large-scale . At present, the blades used in mainstream megawatt wind turbines generally have a blade length of more than 30 m. The blades operate under different wind speeds and must bear different wind loads. Wh...

AI Technical Summary

Problems solved by technology

Since the current megawatt-level wind turbine blades are between 30m and 50m in length, which are large-scale giant components, if you want to build a dedicated ultra-large laboratory and experimental equipment for indoor testing, you will not only have a long construction period, high construction and maintenance costs and other shortcomings, and the blades have to be transported to the special laboratory for testing after leaving the factory, and then transported to the installation site after the test is completed. The transportation is also time-consuming and laborious, which further increases the cost.

The above-mentioned shortcomings and inconveniences in the prior art have greatly increased the manufacturing cost of the blades and limited the production and application of large-scale wind power blades

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