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(ya)縮機(ji)分(fen)為(wei)單(dan)螺桿(gan)壓(ya)縮機(ji)和(he)雙(shuang)螺桿(gan)壓(ya)縮機(ji)，直到1934年瑞典皇家理工(gong)學院A.Lysholm才奠定(ding)了螺桿(gan)式壓(ya)縮機(ji)SRM技術，并開始在工(gong)業上應用，取得(de)了迅(xun)速的發(fa)展。

雙螺桿(gan)主機做介紹，工作(zuo)過(guo)(guo)程(cheng)(cheng)：齒(chi)(chi)(chi)間基(ji)(ji)(ji)元(yuan)(yuan)(yuan)(yuan)容(rong)(rong)積(ji)（即(ji)每對齒(chi)(chi)(chi)所形成的(de)工作(zuo)容(rong)(rong)積(ji)）隨(sui)著轉(zhuan)(zhuan)子(zi)旋(xuan)轉(zhuan)(zhuan)而逐步擴大，并和(he)機器左下方(fang)的(de)進(jin)(jin)(jin)氣(qi)(qi)孔(kong)(kong)(kong)口連通(tong)，氣(qi)(qi)體(ti)通(tong)過(guo)(guo)孔(kong)(kong)(kong)口進(jin)(jin)(jin)入基(ji)(ji)(ji)元(yuan)(yuan)(yuan)(yuan)容(rong)(rong)積(ji)，進(jin)(jin)(jin)氣(qi)(qi)過(guo)(guo)程(cheng)(cheng)開(kai)(kai)始；轉(zhuan)(zhuan)子(zi)旋(xuan)轉(zhuan)(zhuan)到(dao)一定角(jiao)度后，齒(chi)(chi)(chi)間基(ji)(ji)(ji)元(yuan)(yuan)(yuan)(yuan)容(rong)(rong)積(ji)超過(guo)(guo)進(jin)(jin)(jin)氣(qi)(qi)孔(kong)(kong)(kong)口位置后，與進(jin)(jin)(jin)氣(qi)(qi)孔(kong)(kong)(kong)口斷開(kai)(kai)，進(jin)(jin)(jin)氣(qi)(qi)過(guo)(guo)程(cheng)(cheng)結束；轉(zhuan)(zhuan)子(zi)轉(zhuan)(zhuan)到(dao)某一角(jiao)度后，兩(liang)個孤立的(de)齒(chi)(chi)(chi)間基(ji)(ji)(ji)元(yuan)(yuan)(yuan)(yuan)容(rong)(rong)積(ji)由于陽(yang)螺桿(gan)的(de)凸齒(chi)(chi)(chi)侵入陰螺桿(gan)的(de)凹齒(chi)(chi)(chi)，基(ji)(ji)(ji)元(yuan)(yuan)(yuan)(yuan)容(rong)(rong)積(ji)同時開(kai)(kai)始縮小(xiao)，實現氣(qi)(qi)體(ti)的(de)壓縮過(guo)(guo)程(cheng)(cheng)。直到(dao)一對基(ji)(ji)(ji)元(yuan)(yuan)(yuan)(yuan)容(rong)(rong)積(ji)與排(pai)氣(qi)(qi)孔(kong)(kong)(kong)口相連通(tong)的(de)瞬間為(wei)止；基(ji)(ji)(ji)元(yuan)(yuan)(yuan)(yuan)容(rong)(rong)積(ji)和(he)排(pai)氣(qi)(qi)孔(kong)(kong)(kong)口相連通(tong)后，排(pai)氣(qi)(qi)過(guo)(guo)程(cheng)(cheng)開(kai)(kai)始，排(pai)氣(qi)(qi)過(guo)(guo)程(cheng)(cheng)一直持續到(dao)兩(liang)個齒(chi)(chi)(chi)完全嚙合，即(ji)兩(liang)個基(ji)(ji)(ji)元(yuan)(yuan)(yuan)(yuan)容(rong)(rong)積(ji)因兩(liang)個轉(zhuan)(zhuan)子(zi)完全嚙合而等于零時。