Abstract: From the twin-screw compressor rotor meshing line of view, the meshing line method was introduced in detail, the male and female rotor profiles were deduced from the meshing line by meshing and coordinate transformation relationship. The requirements of continuity were given in the meshing line method and the corresponding solving steps which solved the continuity problems in the meshing line method were carried out. Three critical control points on the meshing line were studied and the impacts of its changes of positions on the rotor profiles generated were summarized, including rotor angles, thicknesses and interdental areas. At last, a profile was designed by the meshing line method, and demonstrates the optimization of new profiles by changing the position of critical control points, the design efficiency is increased.

Key words: twin-screw compressor, rotor profile, meshing line method, critical control point

摘要： 从双螺杆压缩机转子啮合线出发，详细介绍了啮合线法，利用啮合关系与型线坐标转换关系推导出阴阳转子型线的方法。给出了啮合线法中的连续性要求并提供了相应的求解步骤，解决了啮合线法设计转子型线过程中的连续性问题。研究了啮合线的3个关键控制点，并总结了其位置变化对转子型线（阴阳转子的齿心角、齿厚以及齿间面积）的影响。最后利用啮合线法设计了一条新型线，并演示了通过改变关键控制点位置的方法提高了新型线排量的方法，提高了设计效率。

关键词: 双螺杆压缩机, 转子型线, 啮合线法, 关键控制点