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Test technical upgrade meets product update

跟著一起來 於 2018年03月23日發表   人氣:336



"The blade size is large, the load is large, and the blade length can even reach 100 meters. Therefore, the blade test requires a large scale for the detection system, and the loading accuracy is also high, which is always the difficulty of the blade test." According to zhang jinfeng, if there is no matching detection system in the market or the lack of detection system capability, the products cannot be truly verified and even the blades are damaged, which will greatly affect the development cycle of blades and the progress of blade input into the market and hinder the development of the whole wind power industry.

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In order to adapt to the constantly updated blade products and constantly improve the testing requirements, the testing technology and testing system are also constantly upgraded.


In the static test process, how to accurately monitor the displacement track of the blade is always a technical difficulty, and also an important indicator to evaluate the consistency of blade design and manufacture. Because the blade will bend and twist during loading, the laser displacement sensor installed cannot obtain effective data. In order to solve this problem, Zhang Jinfeng lead the team based on the most commonly used wire displacement sensor combination of geometric numerical analysis was designed and developed a complete set of three to the displacement measurement system, the system is based on the displacement of the same points in three different numerical analysis to obtain the location of the point, to be able to get the entire testing blade displacement in the process of trajectory, make full use of laboratory equipment, effectively reduce the cost.


In the fatigue test, the current common way is the motor drive swing arm rotation. However, with the increase of blade length and power, the load it bears gradually increases, especially the increase of fatigue load. The previous loading mode will introduce torsion load at the blade loading position, resulting in blade damage. In order to solve this technical problem, jianheng team developed a series of symmetrical swing arm loading equipment, which effectively solved the problem of eccentricity of loading equipment in the test, and protected the blade from other loads in the test process.

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With the gradual development of wind power development, multi-megawatt large-scale wind power generating units, especially those with a power of 5MW or more than 10MW, have become the focus of new product development in equipment manufacturing enterprises. For this reason, Beijing jianheng certification center has now applied for the establishment of "national offshore wind power equipment quality supervision and inspection center" in yangjiang city, guangdong province, and has been approved by the accreditation administration. A public test system for large offshore wind turbines with 150-meter long blades will be built at the center. "At present, our team is working on the development of double-freedom loading technology, new accelerated fatigue technology and other advanced testing technologies are expected to be applied in the supervision and inspection center." Zhang jinfeng said.

 


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