Reverse Design and Dynamic Simulation of Rotors for Screw Compressor
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摘要: 针对传统的双螺杆压缩机转子型线的正向设计方法,计算过程繁琐复杂,且无法预判型线综合性能的问题,在深入研究啮合线与转子型线间关系的基础上,提出一种反向设计方法:通过设计啮合线反求获得阴阳转子型线。建立反向设计时阴阳转子的坐标转换关系,基于啮合原理推导反向设计阴阳转子型线的具体过程,分别以几种典型曲线作为啮合线段反求阴阳转子型线方程。在GHH型线的研究基础上,自行设计了一条啮合线,反向推导计算出一对阴阳转子型线进行流体分析并与GHH型线对比,发现该反向设计转子型线与GHH型线性能接近。结合实验结果表明,反向设计方法可有效应用于螺杆转子型线设计。Abstract: On the basis of deep research on relationship between meshing line and rotor profile, which begins with designing meshing line and then calculates the rotor profiles. After establishing coordinate transformation relations between the male and female rotors, the specific process of reverse design of rotor profile based on the meshing theory is presented. The corresponding rotor profile equations are derived through meshing line consisting of straight line, arc and cubic B-spline curve, respectively. After a meshing line is designed independently according to the research on GHH-type lines, the reverse design method is applied to design a pair of male and female rotor profiles, and the fluid analysis is carried out and compared with GHH-type line. It is found that the performance of these rotor profiles is close to the GHH-type rotor profiles. The experimental results show that the reverse design method can be effectively applied to design the screw rotor profile.
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Key words:
- twin screw compressor /
- reverse design /
- meshing line /
- rotor profile /
- dynamic simulation
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