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)(gan)壓縮(suo)(suo)機(ji)分(fen)為單(dan)螺桿(gan)(gan)壓縮(suo)(suo)機(ji)和雙(shuang)螺桿(gan)(gan)壓縮(suo)(suo)機(ji)，直到1934年(nian)瑞典皇家理工(gong)學院(yuan)A.Lysholm才奠定了(le)螺桿(gan)(gan)式(shi)壓縮(suo)(suo)機(ji)SRM技術，并開始在工(gong)業上應(ying)用，取得了(le)迅(xun)速的(de)發展。

雙螺桿(gan)主(zhu)機做介紹，工(gong)作過(guo)(guo)程(cheng)(cheng)：齒(chi)間(jian)基(ji)(ji)元容(rong)(rong)(rong)(rong)積(ji)(ji)(ji)(ji)（即每(mei)對齒(chi)所形成的(de)工(gong)作容(rong)(rong)(rong)(rong)積(ji)(ji)(ji)(ji)）隨著轉(zhuan)(zhuan)子旋轉(zhuan)(zhuan)而逐步(bu)擴大，并和(he)機器左下方的(de)進氣(qi)(qi)孔(kong)(kong)(kong)口(kou)連通，氣(qi)(qi)體通過(guo)(guo)孔(kong)(kong)(kong)口(kou)進入基(ji)(ji)元容(rong)(rong)(rong)(rong)積(ji)(ji)(ji)(ji)，進氣(qi)(qi)過(guo)(guo)程(cheng)(cheng)開始；轉(zhuan)(zhuan)子旋轉(zhuan)(zhuan)到(dao)一定角度(du)后(hou)，齒(chi)間(jian)基(ji)(ji)元容(rong)(rong)(rong)(rong)積(ji)(ji)(ji)(ji)超(chao)過(guo)(guo)進氣(qi)(qi)孔(kong)(kong)(kong)口(kou)位置(zhi)后(hou)，與(yu)進氣(qi)(qi)孔(kong)(kong)(kong)口(kou)斷開，進氣(qi)(qi)過(guo)(guo)程(cheng)(cheng)結束；轉(zhuan)(zhuan)子轉(zhuan)(zhuan)到(dao)某一角度(du)后(hou)，兩(liang)個孤立的(de)齒(chi)間(jian)基(ji)(ji)元容(rong)(rong)(rong)(rong)積(ji)(ji)(ji)(ji)由于(yu)陽(yang)螺桿(gan)的(de)凸(tu)齒(chi)侵入陰螺桿(gan)的(de)凹齒(chi)，基(ji)(ji)元容(rong)(rong)(rong)(rong)積(ji)(ji)(ji)(ji)同時開始縮(suo)小，實現氣(qi)(qi)體的(de)壓縮(suo)過(guo)(guo)程(cheng)(cheng)。直到(dao)一對基(ji)(ji)元容(rong)(rong)(rong)(rong)積(ji)(ji)(ji)(ji)與(yu)排氣(qi)(qi)孔(kong)(kong)(kong)口(kou)相連通的(de)瞬間(jian)為止；基(ji)(ji)元容(rong)(rong)(rong)(rong)積(ji)(ji)(ji)(ji)和(he)排氣(qi)(qi)孔(kong)(kong)(kong)口(kou)相連通后(hou)，排氣(qi)(qi)過(guo)(guo)程(cheng)(cheng)開始，排氣(qi)(qi)過(guo)(guo)程(cheng)(cheng)一直持(chi)續到(dao)兩(liang)個齒(chi)完(wan)(wan)全嚙(nie)合，即兩(liang)個基(ji)(ji)元容(rong)(rong)(rong)(rong)積(ji)(ji)(ji)(ji)因兩(liang)個轉(zhuan)(zhuan)子完(wan)(wan)全嚙(nie)合而等于(yu)零時。