Abstract:

In the traditional screw compressor rotor profile generation method,the process of cockamamie parameters adjustment and confirmatory is complex;the whole design cycle is long and cannot predict the modified results in advance.Based on freeform curve,two rotor profile generation methods were proposed in
order to solve the problems.One method was positive,and the female and male rotor profiles were acquired by every profile segment defined with freeform curve;another one was reverse,and the rotor profiles were derived through the meshing line.The rotor profiles were fitted by freeform curve and the shape of rotor profiles can be adjusted by moving the control points.Finally,the two methods were used to develop a system for designing the rotor profiles quickly.

Key words: twin screw compressor, freeform curve, rotor profile, meshing line

摘要：

针对传统的双螺杆压缩机转子型线设计过程中,设计参数反复调节和确定的过程复杂以及整个设计周期长且无法预判修改结果的问题,提出了以自由曲线为组成曲线的两种型线设计方法：一种以正向的思路通过定义一条转子型线再得到另一条转子型线;另一种以逆向的思路通过啮合线得到阴阳转子型线。将自由曲线应用到型线设计中,能够灵活地对曲线进行调整。最后,以此理论为基础开发了一个转子型线的设计系统。
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关键词: 双螺杆压缩机, 自由曲线, 转子型线, 啮合线