整体叶轮的叶片旋转不对称性误差计算

Study of Method of Integral Impeller Rotational Asymmetry Calculation

叶轮在制造过程中会受到各种因素的影响,以至叶轮中的叶片会产生旋转不对称的误差。在获得整体叶轮的测量点云数据后,以叶轮中的圆柱面和叶片曲面为基准将点云数据与理论模型进行配准,作为基准位置,然后将每个叶片的点云数据与相邻理论模型中的叶片数据进行配准,通过此配准计算出旋转轴与理论轴的夹角误差、旋转过的角度与理论叶片之间角度的误差、旋转过的叶片与此位置上的理论模型轮廓度的误差。通过此方法可计算出旋转不对称性的误差。

The impeller can be affected by various factors in the process of manufacturing, so the rotational asymmetry error exists in the impeller running. Based on the data of measured point cloud and theoretical model, this paper takes the impeller＇ s cylinder surface and blade data as reference, to be in register of the point cloud data and theoretical model and uses the position of point cloud data and theoretical model as base positions to align every blade cloud date with the date of adjacent blade theoretical model. Through this registration, it is able to calculate the error of angle between rotation shaft and the theory shaft, AI the error between rotation angle and theory angle of two blade, and the profile error. Through this method the rotational asymmetry error can be calculated.