Study On The Wind Wheel Hub Precision Site Testing Technology Based On Laser Tracker

With the deficiency of the regular resources on the earth, wind energy resource play an important role in this energy shortage era. The production of wind energy is rely on the efficient operation of wind turbine generator. It is the wheel hub which connect the blade and the principal axis in the wind turbine generator. Only through the hub, blades can transmit the energy collected to the electric generator, thus the electric energy can be gotten. However, because of the overlarge size and the huge weight of the hub in the wind turbine generator, the tolerance zone of tested elements have a extreme complex structure. Therefore, in order to meet the need of technological requirement, improve the efficiency of wind power generation and provide a high practical value in promoting the detective efficiency and detective accuracy, based on the laser tracker, the detection of the shape and position accuracy of the wind-power wheel hub need to be carried out in the further research.This thesis based on a project of Technology Department of Hebei Province, completing a further research of shape and position accuracy in the locale of the wind-power wheel hub based on laser tracer through two aspects: experimental verification and theoretical design. On the respect of experimental of verification, after analysing the detection of wheel hub, combining characteristics of laser tracer like system composition, working principle, measuring principle and accuracy influence, a practical detection plan was made including gathering detection elements, constructing geometric elements, building and aligning the coordinate system, managing multiple devices and positions. By analysing the structure feature of wheel hub and investigating the company, 3D modeling was finished and a solid model was built with 3D printer. After that, the solid model was verified according to the detection plan with the laser tracer. At the same time, the macro scripting command language was used as the programming language to finish the modularization programming and achieved controlling and directing the wind wheel accuracy detecting methods by macro instruction of Polyworks. On the respect of theoretical designing, the least square method was used as the assessing principle to refactor collection elements, which fitting and constructing the geometric elements. The theoretical data was used as the assessing standard to finish the data processing of the detection project.Through the measurement experiment of solid model of the wind power wheel hub, it is feasible to use laser tracer to detect the spot accuracy of wind power wheel hub. This method can reduce the technological requirement of detection worker, and provide a significant value in improving the accuracy and efficiency of detecting and in automatic detection.