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一、前言膨胀机就是用来使气体膨胀输出外功以产生冷量的一种低温机械。目前在空分装置、低温制冷液化装置上都广泛地采用了各种型式的膨胀机。根据气体膨胀输出外功的方法,膨胀机可分为两大类型:容积式膨胀机和透平式膨胀机。容积式膨胀机是利用气体在可变容积中进行膨胀输出外功。本文所述的各种往复式
I. INTRODUCTION Expander is a kind of low-temperature machine used to make gas expand and output work force to produce cold. Currently in the air separation unit, low temperature refrigeration liquefaction plant are widely used in various types of expander. According to the method of gas expansion output of work, expander can be divided into two types: volumetric expander and turbine expander. Volumetric expander is the use of gas in the variable volume expansion output of work. The various reciprocations described in this article