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。

螺桿壓(ya)(ya)縮機(ji)分為單螺桿壓(ya)(ya)縮機(ji)和雙螺桿壓(ya)(ya)縮機(ji)，直到1934年瑞典皇家理工學院(yuan)A.Lysholm才(cai)奠定(ding)了(le)(le)螺桿式壓(ya)(ya)縮機(ji)SRM技術(shu)，并(bing)開始在工業上應用(yong)，取(qu)得(de)了(le)(le)迅(xun)速的發展。

雙螺(luo)(luo)桿主(zhu)機做介(jie)紹(shao)，工作過(guo)程(cheng)：齒間(jian)基(ji)(ji)元(yuan)(yuan)容(rong)(rong)(rong)積(ji)(ji)（即每(mei)對齒所形(xing)成(cheng)的(de)工作容(rong)(rong)(rong)積(ji)(ji)）隨著轉(zhuan)子(zi)旋轉(zhuan)而逐步擴大(da)，并和(he)機器(qi)左下(xia)方的(de)進(jin)氣(qi)(qi)(qi)孔(kong)(kong)(kong)口(kou)連通，氣(qi)(qi)(qi)體通過(guo)孔(kong)(kong)(kong)口(kou)進(jin)入基(ji)(ji)元(yuan)(yuan)容(rong)(rong)(rong)積(ji)(ji)，進(jin)氣(qi)(qi)(qi)過(guo)程(cheng)開始；轉(zhuan)子(zi)旋轉(zhuan)到(dao)一定角度后(hou)，齒間(jian)基(ji)(ji)元(yuan)(yuan)容(rong)(rong)(rong)積(ji)(ji)超過(guo)進(jin)氣(qi)(qi)(qi)孔(kong)(kong)(kong)口(kou)位(wei)置后(hou)，與(yu)進(jin)氣(qi)(qi)(qi)孔(kong)(kong)(kong)口(kou)斷開，進(jin)氣(qi)(qi)(qi)過(guo)程(cheng)結束；轉(zhuan)子(zi)轉(zhuan)到(dao)某一角度后(hou)，兩(liang)個孤立的(de)齒間(jian)基(ji)(ji)元(yuan)(yuan)容(rong)(rong)(rong)積(ji)(ji)由于陽螺(luo)(luo)桿的(de)凸齒侵入陰螺(luo)(luo)桿的(de)凹齒，基(ji)(ji)元(yuan)(yuan)容(rong)(rong)(rong)積(ji)(ji)同時開始縮小，實現(xian)氣(qi)(qi)(qi)體的(de)壓縮過(guo)程(cheng)。直到(dao)一對基(ji)(ji)元(yuan)(yuan)容(rong)(rong)(rong)積(ji)(ji)與(yu)排(pai)氣(qi)(qi)(qi)孔(kong)(kong)(kong)口(kou)相連通的(de)瞬間(jian)為止；基(ji)(ji)元(yuan)(yuan)容(rong)(rong)(rong)積(ji)(ji)和(he)排(pai)氣(qi)(qi)(qi)孔(kong)(kong)(kong)口(kou)相連通后(hou)，排(pai)氣(qi)(qi)(qi)過(guo)程(cheng)開始，排(pai)氣(qi)(qi)(qi)過(guo)程(cheng)一直持續到(dao)兩(liang)個齒完全嚙合，即兩(liang)個基(ji)(ji)元(yuan)(yuan)容(rong)(rong)(rong)積(ji)(ji)因(yin)兩(liang)個轉(zhuan)子(zi)完全嚙合而等于零時。