本文对汽车、工程机械等广泛应用的向心涡轮式液力变矩器循环圆,建立了计算机辅助设计的数学模型、应用统计数据和公式确定循环圆外环形状、应用轴面流通面积相等这一准则确定设计流线和内环流线,同时在计算机屏幕上显示出循环圆的形状,并可作修改,其结果打印出数据和绘出图形。 In this paper, the radial circle of the centripetal turbine torque converter, which is widely used in automobile and construction machinery, is established, and the mathematic model of computer aided design is established. The outer circle shape of circular circle is determined by statistical data and formulas. A guideline determines the design streamline and the inner streamline while displaying the shape of the circular circle on the computer screen and making modifications that result in the printing of data and drawing of graphics.