The function and performance of the sealing line are describedand the calculation of the length as well as the solution for the equation of the interlobe seal-ing line are studied.

• 在分析螺杆压缩机泄漏通道与泄漏机理的基础上，导出了泄漏量公式；解析了密封线作用和影响；讨论了求解齿面密封线方程与长度的算法；提出了对应点序列法与递推公式来求齿面密封线长度。