中文摘要：

为提高车用液力元件功率密度,从叶栅系统设计角度出发,通过对传统圆形循环圆宽度约束条件和设计流线构造方法进行分析研究,提出一种轴向宽度可柔性调节的循环圆设计方法,仅利用循环圆参数有效直径D、最小直径d0和宽度极限Wlim3个参数,可将其扁平比从原有0.31无级压缩至0.19,据此实现了对应叶栅系统设计,并编制了简便快捷的程序。与传统液力元件对比表明,在有效直径和最小直径一致的情况下,采用柔性设计方法,当循环圆压缩至轴向最小极限位置时工作腔体积减小至40.9%,有效地提高了液力元件功率密度,同时简化了原有基于经验的循环圆设计方法。

英文摘要：

In order to improve power density of vehicular hydrodynamic transmission components,with the aspect of structure design of cascade system,a blades design method for flat circular circle was put forward.Based on the analysis of constraint conditions and design streamline of traditional circular circle,the flatness ratio could be changed from 0.31 to 0.19 with only three parameters of effective diameter D,minimum diameter d0 and width limit Wlim.Besides,the program was rapid and convenient.Compared with traditional hydrodynamic components,the working volume obtained by flexible flat circular circle could be compressed to 40.9% with the same maximum diameter D and minimum diameter d0.The power density of hydrodynamic components was improved effectively and meanwhile traditional circular circle design method was simplified distinctly.