壓(ya)縮比(bi)較低(di)，對氫(qing)氣抽(chou)氣效(xiao)果差(cha)；主動(dong)軸通(tong)過聯(lian)軸器(qi)與電(dian)機連(lian)接，在(zai)傳動(dong)結構(gou)布置(zhi)上主(zhu)要有(you)兩種(zhong)，電動(dong)機與(yu)齒輪(lun)放在(zai)轉💞子(zi)的同(tong)一側(ce)。從動(dong)轉子(zi)由電(dian)動機(ji)端齒(chi)輪直(zhi)接傳(chuan)過去(qu)帶動(dong)，這樣(yang)主動(dong)轉子(zi)軸的(de)扭轉(zhuan)變形(xing)小，則(ze)兩個(ge)轉💋子(zi)之間(jian)的間(jian)隙不(bu)會🔆因(yin)主動(dong)軸的(de)扭轉(zhuan)變形(xing)大而(er)改變(bian)，故⭕使(shi)轉子(zi)之間(jian)的間(jian)隙在(zai)運♍轉(zhuan)過程(cheng)中均(jun)勻🔴。