螺桿壓縮機，也稱螺旋式壓縮機，包括螺桿空氣壓縮機和螺桿工藝壓縮機（氯乙烯壓縮機等），螺桿機為容積式雙螺桿噴油壓縮機，一般為箱式撬裝結構。

螺桿(gan)壓縮(suo)機(ji)(ji)(ji)分為單螺桿(gan)壓縮(suo)機(ji)(ji)(ji)和雙(shuang)螺桿(gan)壓縮(suo)機(ji)(ji)(ji)，直到1934年瑞(rui)典皇家理工(gong)學院A.Lysholm才(cai)奠定了螺桿(gan)式壓縮(suo)機(ji)(ji)(ji)SRM技術，并開始在工(gong)業上應用，取(qu)得了迅速的發展。

雙螺桿(gan)(gan)主機(ji)做介(jie)紹，工作過(guo)(guo)(guo)程(cheng)(cheng)：齒(chi)(chi)間基(ji)元(yuan)容(rong)(rong)(rong)(rong)積(ji)(ji)(ji)（即每對齒(chi)(chi)所形成(cheng)的(de)工作容(rong)(rong)(rong)(rong)積(ji)(ji)(ji)）隨著轉(zhuan)子旋轉(zhuan)而逐步擴大，并(bing)和機(ji)器(qi)左下(xia)方的(de)進(jin)(jin)(jin)(jin)(jin)氣(qi)(qi)孔(kong)口連(lian)通，氣(qi)(qi)體通過(guo)(guo)(guo)孔(kong)口進(jin)(jin)(jin)(jin)(jin)入基(ji)元(yuan)容(rong)(rong)(rong)(rong)積(ji)(ji)(ji)，進(jin)(jin)(jin)(jin)(jin)氣(qi)(qi)過(guo)(guo)(guo)程(cheng)(cheng)開(kai)始；轉(zhuan)子旋轉(zhuan)到一定角(jiao)度后，齒(chi)(chi)間基(ji)元(yuan)容(rong)(rong)(rong)(rong)積(ji)(ji)(ji)超過(guo)(guo)(guo)進(jin)(jin)(jin)(jin)(jin)氣(qi)(qi)孔(kong)口位置(zhi)后，與(yu)進(jin)(jin)(jin)(jin)(jin)氣(qi)(qi)孔(kong)口斷(duan)開(kai)，進(jin)(jin)(jin)(jin)(jin)氣(qi)(qi)過(guo)(guo)(guo)程(cheng)(cheng)結束；轉(zhuan)子轉(zhuan)到某一角(jiao)度后，兩(liang)個(ge)孤立的(de)齒(chi)(chi)間基(ji)元(yuan)容(rong)(rong)(rong)(rong)積(ji)(ji)(ji)由(you)于(yu)陽螺桿(gan)(gan)的(de)凸齒(chi)(chi)侵入陰螺桿(gan)(gan)的(de)凹齒(chi)(chi)，基(ji)元(yuan)容(rong)(rong)(rong)(rong)積(ji)(ji)(ji)同時開(kai)始縮小(xiao)，實現氣(qi)(qi)體的(de)壓縮過(guo)(guo)(guo)程(cheng)(cheng)。直(zhi)到一對基(ji)元(yuan)容(rong)(rong)(rong)(rong)積(ji)(ji)(ji)與(yu)排(pai)氣(qi)(qi)孔(kong)口相連(lian)通的(de)瞬間為止；基(ji)元(yuan)容(rong)(rong)(rong)(rong)積(ji)(ji)(ji)和排(pai)氣(qi)(qi)孔(kong)口相連(lian)通后，排(pai)氣(qi)(qi)過(guo)(guo)(guo)程(cheng)(cheng)開(kai)始，排(pai)氣(qi)(qi)過(guo)(guo)(guo)程(cheng)(cheng)一直(zhi)持續到兩(liang)個(ge)齒(chi)(chi)完全(quan)嚙合，即兩(liang)個(ge)基(ji)元(yuan)容(rong)(rong)(rong)(rong)積(ji)(ji)(ji)因兩(liang)個(ge)轉(zhuan)子完全(quan)嚙合而等(deng)于(yu)零時。