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)壓縮機(ji)(ji)分為(wei)單螺桿(gan)(gan)壓縮機(ji)(ji)和(he)雙螺桿(gan)(gan)壓縮機(ji)(ji)，直到1934年(nian)瑞典皇(huang)家理(li)工學院A.Lysholm才奠(dian)定了螺桿(gan)(gan)式壓縮機(ji)(ji)SRM技術(shu)，并開始在工業(ye)上應用，取(qu)得了迅速(su)的發(fa)展。

雙螺桿(gan)(gan)主機(ji)做(zuo)介紹，工作過(guo)(guo)程(cheng)(cheng)：齒(chi)間(jian)基(ji)元容(rong)(rong)(rong)(rong)積(ji)（即每(mei)對(dui)齒(chi)所(suo)形成的工作容(rong)(rong)(rong)(rong)積(ji)）隨著轉(zhuan)子旋(xuan)轉(zhuan)而逐步(bu)擴(kuo)大，并和(he)機(ji)器(qi)左下方的進(jin)(jin)氣(qi)(qi)孔(kong)(kong)(kong)口(kou)(kou)連通，氣(qi)(qi)體(ti)通過(guo)(guo)孔(kong)(kong)(kong)口(kou)(kou)進(jin)(jin)入(ru)基(ji)元容(rong)(rong)(rong)(rong)積(ji)，進(jin)(jin)氣(qi)(qi)過(guo)(guo)程(cheng)(cheng)開(kai)始；轉(zhuan)子旋(xuan)轉(zhuan)到(dao)一定角度(du)后(hou)，齒(chi)間(jian)基(ji)元容(rong)(rong)(rong)(rong)積(ji)超(chao)過(guo)(guo)進(jin)(jin)氣(qi)(qi)孔(kong)(kong)(kong)口(kou)(kou)位置后(hou)，與進(jin)(jin)氣(qi)(qi)孔(kong)(kong)(kong)口(kou)(kou)斷開(kai)，進(jin)(jin)氣(qi)(qi)過(guo)(guo)程(cheng)(cheng)結束；轉(zhuan)子轉(zhuan)到(dao)某一角度(du)后(hou)，兩個(ge)(ge)孤(gu)立的齒(chi)間(jian)基(ji)元容(rong)(rong)(rong)(rong)積(ji)由于陽螺桿(gan)(gan)的凸齒(chi)侵(qin)入(ru)陰(yin)螺桿(gan)(gan)的凹齒(chi)，基(ji)元容(rong)(rong)(rong)(rong)積(ji)同時開(kai)始縮小，實現氣(qi)(qi)體(ti)的壓縮過(guo)(guo)程(cheng)(cheng)。直到(dao)一對(dui)基(ji)元容(rong)(rong)(rong)(rong)積(ji)與排(pai)氣(qi)(qi)孔(kong)(kong)(kong)口(kou)(kou)相連通的瞬間(jian)為止；基(ji)元容(rong)(rong)(rong)(rong)積(ji)和(he)排(pai)氣(qi)(qi)孔(kong)(kong)(kong)口(kou)(kou)相連通后(hou)，排(pai)氣(qi)(qi)過(guo)(guo)程(cheng)(cheng)開(kai)始，排(pai)氣(qi)(qi)過(guo)(guo)程(cheng)(cheng)一直持續到(dao)兩個(ge)(ge)齒(chi)完(wan)全(quan)(quan)嚙(nie)合(he)，即兩個(ge)(ge)基(ji)元容(rong)(rong)(rong)(rong)積(ji)因兩個(ge)(ge)轉(zhuan)子完(wan)全(quan)(quan)嚙(nie)合(he)而等于零時。