基于流体仿真的双螺杆压缩机的转子结构优化设计

The Design of Structure Optimization on Twin-Screw Compressor Rotors Based on the Fluid Simulation

摘要: 我国国内的双螺杆压缩机型线设计水平相对于国外比较落后，转子型线是压缩机的重要零件，本文提出设计以新型圆弧包络线为基础的螺杆转子的新思路，以单边不对称摆线-销齿圆弧型线为研究对象，开发设计了新型转子型线。应用圆弧包络线构建了螺杆转子的齿廓线；利用三维软件建立了双螺杆压缩机原型线与新型线流场仿真模型，运用Fluent软件模拟了其在工作转速下压强与流速的分布规律。由仿真结果对新型线设计的合理性进行了预判，并为新型线的改进优化直至获得性能优良的双螺杆压缩机阴阳转子提供了参考依据。

Abstract: The level of designing the twin-screw compress or rotor profile in our country is relatively backward compared to foreign countries. The rotor is an important part of the screw compressor. This paper presents the new ideas based on arc-envelope to design the screw rotor. Taking the unilateral asymmetric cycloid-pins arc tooth profile as the research object, it designed a new type of rotor profile and built screw rotors with arc envelope tooth profile. It founded flow field simulation model of the original, and new twin-screw compressor rotor profile adopted the 3D software, simulated the distribution of its pressure and flow rate at operating speed with the software of Fluent. It predicted the rational of simulation results on the new designed rotor profile and provided a reference for the improvement of the new male and female twin-screw compressor rotors until getting the excellent performance rotors.