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)(ya)縮機分為單螺桿(gan)壓(ya)(ya)縮機和雙螺桿(gan)壓(ya)(ya)縮機，直到1934年瑞典(dian)皇家(jia)理工學院A.Lysholm才奠(dian)定了(le)螺桿(gan)式壓(ya)(ya)縮機SRM技術(shu)，并開始在工業上應用，取得了(le)迅速(su)的發展。

雙螺桿(gan)主(zhu)機(ji)做介(jie)紹，工(gong)作過(guo)程(cheng)：齒(chi)(chi)間(jian)基元(yuan)(yuan)容(rong)(rong)(rong)積(ji)（即(ji)每(mei)對齒(chi)(chi)所形成的(de)(de)(de)(de)工(gong)作容(rong)(rong)(rong)積(ji)）隨著(zhu)轉(zhuan)(zhuan)(zhuan)子(zi)旋轉(zhuan)(zhuan)(zhuan)而(er)(er)逐(zhu)步(bu)擴大，并和機(ji)器左(zuo)下方的(de)(de)(de)(de)進(jin)(jin)氣(qi)(qi)(qi)(qi)孔(kong)口(kou)連(lian)通，氣(qi)(qi)(qi)(qi)體通過(guo)孔(kong)口(kou)進(jin)(jin)入(ru)基元(yuan)(yuan)容(rong)(rong)(rong)積(ji)，進(jin)(jin)氣(qi)(qi)(qi)(qi)過(guo)程(cheng)開(kai)(kai)(kai)始(shi)；轉(zhuan)(zhuan)(zhuan)子(zi)旋轉(zhuan)(zhuan)(zhuan)到(dao)一定角(jiao)度(du)后，齒(chi)(chi)間(jian)基元(yuan)(yuan)容(rong)(rong)(rong)積(ji)超過(guo)進(jin)(jin)氣(qi)(qi)(qi)(qi)孔(kong)口(kou)位(wei)置(zhi)后，與(yu)進(jin)(jin)氣(qi)(qi)(qi)(qi)孔(kong)口(kou)斷開(kai)(kai)(kai)，進(jin)(jin)氣(qi)(qi)(qi)(qi)過(guo)程(cheng)結(jie)束；轉(zhuan)(zhuan)(zhuan)子(zi)轉(zhuan)(zhuan)(zhuan)到(dao)某一角(jiao)度(du)后，兩個孤立的(de)(de)(de)(de)齒(chi)(chi)間(jian)基元(yuan)(yuan)容(rong)(rong)(rong)積(ji)由于陽螺桿(gan)的(de)(de)(de)(de)凸齒(chi)(chi)侵(qin)入(ru)陰螺桿(gan)的(de)(de)(de)(de)凹齒(chi)(chi)，基元(yuan)(yuan)容(rong)(rong)(rong)積(ji)同時(shi)開(kai)(kai)(kai)始(shi)縮小，實現氣(qi)(qi)(qi)(qi)體的(de)(de)(de)(de)壓縮過(guo)程(cheng)。直到(dao)一對基元(yuan)(yuan)容(rong)(rong)(rong)積(ji)與(yu)排(pai)(pai)氣(qi)(qi)(qi)(qi)孔(kong)口(kou)相(xiang)連(lian)通的(de)(de)(de)(de)瞬間(jian)為止；基元(yuan)(yuan)容(rong)(rong)(rong)積(ji)和排(pai)(pai)氣(qi)(qi)(qi)(qi)孔(kong)口(kou)相(xiang)連(lian)通后，排(pai)(pai)氣(qi)(qi)(qi)(qi)過(guo)程(cheng)開(kai)(kai)(kai)始(shi)，排(pai)(pai)氣(qi)(qi)(qi)(qi)過(guo)程(cheng)一直持續(xu)到(dao)兩個齒(chi)(chi)完全嚙合，即(ji)兩個基元(yuan)(yuan)容(rong)(rong)(rong)積(ji)因(yin)兩個轉(zhuan)(zhuan)(zhuan)子(zi)完全嚙合而(er)(er)等于零時(shi)。