電(dian)(dian)(dian)機(ji)(ji)(ji)(ji)溫度高某公司(si)的(de)300MW機(ji)(ji)(ji)(ji)組，每臺機(ji)(ji)(ji)(ji)組配備(bei)2臺機(ji)(ji)(ji)(ji)械(xie)真(zhen)空泵，其(qi)中(zhong)1臺運(yun)(yun)(yun)行，1臺備(bei)用。真(zhen)空泵用于機(ji)(ji)(ji)(ji)組啟動時(shi)抽真(zhen)空，正常運(yun)(yun)(yun)行時(shi)用于抽出(chu)凝汽器中(zhong)未凝結的(de)氣體。該泵配備(bei)電(dian)(dian)(dian)機(ji)(ji)(ji)(ji)160kW，轉速(su)590r/min，額定(ding)電(dian)(dian)(dian)流(liu)330A，電(dian)(dian)(dian)壓380V，B級絕(jue)(jue)緣(yuan)(yuan)，正常運(yun)(yun)(yun)行時(shi)電(dian)(dian)(dian)流(liu)220～230A。每年夏(xia)季，電(dian)(dian)(dian)機(ji)(ji)(ji)(ji)溫度都會超限，加(jia)裝臨時(shi)冷(leng)卻風機(ji)(ji)(ji)(ji)，但收效不大。電(dian)(dian)(dian)機(ji)(ji)(ji)(ji)長期高溫運(yun)(yun)(yun)行會造成絕(jue)(jue)緣(yuan)(yuan)老化，縮短其(qi)使(shi)用壽命。

在確(que)定(ding)了(le)工藝(yi)要求(qiu)(qiu)(qiu)(qiu)的真(zhen)(zhen)空(kong)(kong)(kong)度(du)(du)的基(ji)礎上檢(jian)(jian)(jian)查(cha)真(zhen)(zhen)空(kong)(kong)(kong)泵系(xi)(xi)(xi)統(tong)(tong)(tong)的極限(xian)真(zhen)(zhen)空(kong)(kong)(kong)度(du)(du)，因(yin)為(wei)(wei)系(xi)(xi)(xi)統(tong)(tong)(tong)的極限(xian)真(zhen)(zhen)空(kong)(kong)(kong)度(du)(du)決定(ding)了(le)系(xi)(xi)(xi)統(tong)(tong)(tong)的佳工作(zuo)真(zhen)(zhen)空(kong)(kong)(kong)度(du)(du)。一(yi)般(ban)來講，系(xi)(xi)(xi)統(tong)(tong)(tong)的極限(xian)真(zhen)(zhen)空(kong)(kong)(kong)度(du)(du)比系(xi)(xi)(xi)統(tong)(tong)(tong)的工作(zuo)真(zhen)(zhen)空(kong)(kong)(kong)度(du)(du)低20%，比前級(ji)泵的極限(xian)真(zhen)(zhen)空(kong)(kong)(kong)度(du)(du)低50%。檢(jian)(jian)(jian)查(cha)確(que)定(ding)工藝(yi)要求(qiu)(qiu)(qiu)(qiu)的抽(chou)(chou)(chou)氣(qi)種類與(yu)抽(chou)(chou)(chou)氣(qi)量(liang)。因(yin)為(wei)(wei)如果被(bei)抽(chou)(chou)(chou)氣(qi)體(ti)種類與(yu)泵內液體(ti)發生反(fan)應，泵系(xi)(xi)(xi)統(tong)(tong)(tong)將被(bei)污(wu)染。同時(shi)(shi)必須考(kao)慮確(que)定(ding)合適的排氣(qi)時(shi)(shi)間與(yu)抽(chou)(chou)(chou)氣(qi)過程中產生的氣(qi)體(ti)量(liang)。檢(jian)(jian)(jian)查(cha)確(que)定(ding)達到(dao)要求(qiu)(qiu)(qiu)(qiu)的真(zhen)(zhen)空(kong)(kong)(kong)度(du)(du)所需(xu)要的時(shi)(shi)間、真(zhen)(zhen)空(kong)(kong)(kong)管(guan)道的流阻與(yu)泄漏。考(kao)慮達到(dao)要求(qiu)(qiu)(qiu)(qiu)真(zhen)(zhen)空(kong)(kong)(kong)度(du)(du)后在一(yi)定(ding)工藝(yi)要求(qiu)(qiu)(qiu)(qiu)條件下維持真(zhen)(zhen)空(kong)(kong)(kong)需(xu)要的抽(chou)(chou)(chou)氣(qi)速率(lv)。

氣(qi)體(ti)傳輸泵(beng)(beng)是(shi)一種能使氣(qi)體(ti)不(bu)斷的(de)吸(xi)(xi)(xi)入和(he)排出，借以(yi)達(da)到(dao)抽(chou)氣(qi)目的(de)的(de)真(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)，這種泵(beng)(beng)基本上有兩種類型：變(bian)容真(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)利(li)用泵(beng)(beng)腔容積的(de)周期性變(bian)化來完成吸(xi)(xi)(xi)氣(qi)和(he)排氣(qi)過程的(de)一種真(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)，氣(qi)體(ti)在排出前被壓縮。這種泵(beng)(beng)分為(wei)往復式(shi)及旋(xuan)片式(shi)兩種：（1） 往復式(shi)真(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)：是(shi)利(li)用泵(beng)(beng)腔內(nei)(nei)活塞做往復式(shi)運動，將氣(qi)體(ti)吸(xi)(xi)(xi)入、壓縮并(bing)(bing)排出。因(yin)此，又(you)稱為(wei)活塞式(shi)真(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)。（2） 旋(xuan)片式(shi)真(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)：是(shi)利(li)用泵(beng)(beng)腔內(nei)(nei)活塞做旋(xuan)轉運動，將氣(qi)體(ti)吸(xi)(xi)(xi)入、壓縮并(bing)(bing)排出。