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(ya)(ya)縮機分為單螺桿(gan)(gan)壓(ya)(ya)縮機和雙螺桿(gan)(gan)壓(ya)(ya)縮機，直到1934年瑞典(dian)皇家(jia)理工學院A.Lysholm才奠定了螺桿(gan)(gan)式壓(ya)(ya)縮機SRM技術，并開(kai)始在工業上(shang)應用，取(qu)得(de)了迅(xun)速的(de)發展。

雙螺(luo)桿(gan)主(zhu)機做(zuo)介紹，工作過(guo)(guo)程(cheng)：齒間(jian)(jian)基元(yuan)(yuan)(yuan)(yuan)容(rong)(rong)(rong)(rong)(rong)積(ji)(ji)(ji)（即(ji)(ji)每(mei)對(dui)齒所形成的(de)工作容(rong)(rong)(rong)(rong)(rong)積(ji)(ji)(ji)）隨(sui)著轉(zhuan)子旋轉(zhuan)而逐步擴(kuo)大，并和機器左下方(fang)的(de)進(jin)氣(qi)(qi)(qi)(qi)孔(kong)口(kou)(kou)(kou)連通，氣(qi)(qi)(qi)(qi)體通過(guo)(guo)孔(kong)口(kou)(kou)(kou)進(jin)入基元(yuan)(yuan)(yuan)(yuan)容(rong)(rong)(rong)(rong)(rong)積(ji)(ji)(ji)，進(jin)氣(qi)(qi)(qi)(qi)過(guo)(guo)程(cheng)開始；轉(zhuan)子旋轉(zhuan)到一(yi)定角(jiao)度(du)(du)后，齒間(jian)(jian)基元(yuan)(yuan)(yuan)(yuan)容(rong)(rong)(rong)(rong)(rong)積(ji)(ji)(ji)超過(guo)(guo)進(jin)氣(qi)(qi)(qi)(qi)孔(kong)口(kou)(kou)(kou)位置后，與進(jin)氣(qi)(qi)(qi)(qi)孔(kong)口(kou)(kou)(kou)斷開，進(jin)氣(qi)(qi)(qi)(qi)過(guo)(guo)程(cheng)結束；轉(zhuan)子轉(zhuan)到某一(yi)角(jiao)度(du)(du)后，兩(liang)個孤立的(de)齒間(jian)(jian)基元(yuan)(yuan)(yuan)(yuan)容(rong)(rong)(rong)(rong)(rong)積(ji)(ji)(ji)由于陽螺(luo)桿(gan)的(de)凸齒侵入陰螺(luo)桿(gan)的(de)凹(ao)齒，基元(yuan)(yuan)(yuan)(yuan)容(rong)(rong)(rong)(rong)(rong)積(ji)(ji)(ji)同(tong)時(shi)(shi)開始縮小，實(shi)現氣(qi)(qi)(qi)(qi)體的(de)壓縮過(guo)(guo)程(cheng)。直(zhi)到一(yi)對(dui)基元(yuan)(yuan)(yuan)(yuan)容(rong)(rong)(rong)(rong)(rong)積(ji)(ji)(ji)與排(pai)氣(qi)(qi)(qi)(qi)孔(kong)口(kou)(kou)(kou)相(xiang)連通的(de)瞬間(jian)(jian)為止；基元(yuan)(yuan)(yuan)(yuan)容(rong)(rong)(rong)(rong)(rong)積(ji)(ji)(ji)和排(pai)氣(qi)(qi)(qi)(qi)孔(kong)口(kou)(kou)(kou)相(xiang)連通后，排(pai)氣(qi)(qi)(qi)(qi)過(guo)(guo)程(cheng)開始，排(pai)氣(qi)(qi)(qi)(qi)過(guo)(guo)程(cheng)一(yi)直(zhi)持(chi)續到兩(liang)個齒完全(quan)嚙合(he)，即(ji)(ji)兩(liang)個基元(yuan)(yuan)(yuan)(yuan)容(rong)(rong)(rong)(rong)(rong)積(ji)(ji)(ji)因(yin)兩(liang)個轉(zhuan)子完全(quan)嚙合(he)而等于零時(shi)(shi)。