Screw rotor profile design method and screw compressor

The invention provides a screw rotor profile design method and a screw compressor, and the method comprises the following steps: drawing a rack line for mutual engagement of a female rotor and a male rotor through segmented design, and the rack line is formed by smoothly connecting seven sections of curves end to end; optimizing a male rotor tooth curve and a female rotor tooth curve according to the rack line; and according to the female rotor tooth curve and the male rotor tooth curve, obtaining a corresponding female rotor molded line and a male rotor molded line. According to the method, the large calculation amount caused by direct optimization of the female rotor profile and the male rotor profile can be avoided, and therefore the design efficiency of the rotor profiles is improved. 本发明提供一种螺杆转子型线设计方法和螺杆压缩机，所述方法包括：通过分段设计绘制出阴转子和阳转子相互啮合的齿条线，所述齿条线是由七段曲线首尾光滑连接而成；根据所述齿条线优化阳转子齿曲线和阴转子齿曲线；以及根据所述阴转子齿曲线和所述阳转子齿曲线得到对应的阴转子型线和阳转子型线。本发明可避免直接优化阴转子型线和阳转子型线而带来的较大计算量，从而提高转子型线的设计效率。