Mechanical Characteristics of Internal Meshing Rotor Compressor Impacted by Structure Parameters

Abstract

Abstract:

Based on the influence of rotors by individual structure parameters of an internal meshing rotor compressor, 3 individual structure parameters were integrated together via the definition of 2 relative structure parameters. The pressure distribution in the working chambers, the gas force and moments acted on rotors and the diving moment of the main shaft impacted by those 2 relative structure parameters were investigated. The results reveal that λe will dramatically influence the gas force and gas moments on the inner and outer rotor.The gas force reduces and the fluctuation of the gas moments on rotors increases with the rise of λe. Furthermore, when λe is large enough,the value of the gas moment on the outer rotor is negative. The diving moment of the main shaft is majorly influenced by λa and the larger λa will lead to the rise of the average and fluctuation of the diving moment. The larger λe and smaller λa can improve the compressor's mechanical characteristics if other influencing factors are ignored. The present approach can be beneficial to the design and optimization of structure parameters for the internal meshing rotor compressor.

Key words: structure parameter, rotor, compressor, gas force, moment

摘要：

在分析内啮合转子压缩机独立结构参数对转子影响的基础上，通过定义2个相对结构参数，将影响较大的3个独立结构参数关联在一起，研究了相对结构参数对工作腔压力分布、转子上承受的气体力和气体力力矩以及主轴驱动力矩的影响。研究结果表明,λe对气体力和内外转子上的气体力矩影响较大,随着λe的增大,气体力逐渐减小,内外转子上承受的气体力矩波动加剧,特别是当λe增大到一定值后,外转子上气体力矩会始终为负；λa对主轴驱动力矩影响较大,随着λa的增大，驱动力矩的平均值和变化幅度均增大。在不考虑其他因素的情况下，选择较大的λe和较小的λa对改善压缩机受力情况有利。研究结果可为内啮合转子压缩机的设计及结构参数优化提供一定的参考。

关键词: 结构参数, 转子, 压缩机, 气体力, 力矩

CLC Number:

TH45

Feng Shiyu, Huang Long, Wang Qixiang, Liu Weihua. Mechanical Characteristics of Internal Meshing Rotor Compressor Impacted by Structure Parameters[J]. China Mechanical Engineering, 2013, 24(24): 3267-3272.

冯诗愚, 黄龙, 汪其祥, 刘卫华. 结构参数对内啮合转子压缩机受力特性的影响[J]. 中国机械工程, 2013, 24(24): 3267-3272.

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