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1.绪言螺杆式压缩机具有振动小,维护保养容易等优点,另外它又具备回转式的许多优点,使用场合已发展到多方面。近年来,又在冷冻空调机领域内取得了惊人的发展。可是,最近由于能源紧张,对各种机械的高效化成了紧迫的要求。正与其它压缩机一样,提高螺杆压缩机的效率成为当前的一项重要课题。至今对螺杆压缩机的性能分析主要还是进行一些实验,而从理论上进行分析的还比较少。螺杆压缩机可看作是一种多气缸压缩机,气缸之间气体的相互泄漏是决定性能的重要因素。各气缸的温度、压力变化除了与其它气缸的温度、压力变化有互相影响外,还存在着气
1. INTRODUCTION Screw compressor has the advantages of small vibration, easy maintenance and so on. In addition, it has many advantages of rotary type. The use occasion has been developed to many aspects. In recent years, they have made remarkable progress in the field of refrigeration and air conditioning. However, the recent energy shortage has put pressing demands on various types of machinery. As with other compressors, increasing the efficiency of screw compressors is an important issue at the moment. So far, the performance analysis of the screw compressor is mainly carried out some experiments, but the theoretical analysis is still relatively small. Screw compressor can be seen as a multi-cylinder compressor, gas leakage between the cylinders is an important factor in determining performance. Each cylinder temperature and pressure changes in addition to other cylinder temperature and pressure changes have mutual influence, there is still gas