Abstract
In order to accurately measure and evaluate the quality of the roller profile of the ultra-long flexible blade bearing, an error evaluation model is established for the arc segment and the straight segment of the roller based on the least square method, and then an overall quality evaluation model is proposed based on these two error models. Through the simulation of a standard wind turbine cylindrical roller bearing, it is found that the quality evaluation model established in this work can effectively measure and evaluate the contour line of the wind turbine bearing’s roller. The overall absolute error is 0.0319 mm, which is consistent with the set random error. The overall quality evaluation model is also valid for other types of bearings commonly used in the wind turbine, which include arc and straight segments, and can be used to evaluate the error quality of the roller profile of wind turbine bearings.
Highlights
With the enlargement of wind turbine diameter, the blades have developed from tens of meters to hundreds of meters
Based on the least square method of segmented fitting and multi-value optimization, for the ultra-long flexible wind turbine blade, the bearing error model is firstly established in segments, and based on the error model, the overall quality evaluation model of the wind turbine bearing roller profile is proposed
In the Equation 8, the points involved in the calculation of the error of the straight line segment take a positive value on the upper part of the common tangent, otherwise take a negative value
Summary
With the enlargement of wind turbine diameter, the blades have developed from tens of meters to hundreds of meters. The fluctuation of wind-turbine loads puts stricter quality requirements on wind turbine bearing rollers [1,2]. It is becoming more and more important to accurately assess the quality of large wind turbine bearing rollers. Based on the least square method of segmented fitting and multi-value optimization, for the ultra-long flexible wind turbine blade, the bearing error model is firstly established in segments, and based on the error model, the overall quality evaluation model of the wind turbine bearing roller profile is proposed.
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