液力变矩器导轮内外环剖面轮廓线的自动分段圆弧逼近

发布时间：2018-04-25 15:00

本文选题：液力变矩器 + 导轮　；参考：《中原工学院学报》2017年01期

【摘要】：对液力变矩器导轮内外环剖面轮廓线的逼近问题进行研究,提出了一种基于误差控制、自动分段的多段圆弧逼近方法。根据导轮内外环剖面轮廓线方程,用数值方法计算出离散点坐标;用三点构造圆弧的方法近似求得内外环剖面轮廓线的曲率半径;以极角为自变量确定曲率半径的变化规律;用给定允许误差控制逼近圆弧的段数;用等差数列确定各个逼近圆弧的半径;利用线性插值公式和非开平方计算方法对圆弧参数进行推演计算;最后进行实际逼近误差的计算。采用面向对象的设计方法开发了参数化程序。用该程序可以完成全部计算,生成自动绘制导轮模型旋转体的AutoLisp程序,输出旋转体剖切曲面的点云数据,还可以输出数值模拟后处理编程的数据。研究结果表明,该方法是可行的,可以大大减少建模时间,具有工程使用价值。
[Abstract]:The approximation problem of the profile of the inner and outer ring profile of the guide wheel of hydraulic torque converter is studied. A multi-segment arc approximation method based on error control and automatic segmentation is proposed. According to the profile equation of the inner and outer ring profile of the guide wheel, the discrete point coordinates are calculated by numerical method, the curvature radius of the profile profile of the inner and outer ring profile is approximately obtained by the three-point circular arc method, the variation law of the curvature radius is determined by using the pole angle as the independent variable. The given allowable error is used to control the number of approximate arc segments; the radius of each approximation arc is determined by the sequence of equal difference; the arc parameters are calculated by linear interpolation formula and non-open square calculation method; finally, the actual approximation error is calculated. The parametric program is developed by using object-oriented design method. With this program, the whole calculation can be completed, the AutoLisp program for automatically drawing the rotating body of the guide wheel model can be generated, the point cloud data of the cutting surface of the rotary body can be outputted, and the post-processing data of numerical simulation can be outputted. The results show that the method is feasible and can greatly reduce the modeling time.
【作者单位】：华北水利水电大学机械学院;
【基金】：郑州市科技攻关计划项目(0424260038)
【分类号】：TH137.332

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