關于羅茨鼓風機轉子間摩擦碰撞的維修技巧
羅茨鼓風機(ji)(ji)兩轉(zhuan)子之間發生摩擦和碰(peng)撞是羅茨鼓風機(ji)(ji)最常見的故障。在運轉(zhuan)過程中，如(ru)能(neng)聽到(dao)明顯(xian)的碰(peng)撞聲，用手(shou)摸機(ji)(ji)殼能(neng)感到(dao)有輕微的震動時，應立即停車檢查(cha)。
首先不要急于拆卸，應對風機進行(xing)全(quan)面(mian)檢(jian)查。用手(shou)(shou)觸(chu)摸各(ge)部(bu)軸承外(wai)殼(ke)和前后(hou)機外(wai)殼(ke)溫(wen)度是否(fou)正常，用手(shou)(shou)或(huo)工具(ju)轉(zhuan)動聯軸器進行(xing)盤(pan)車，檢(jian)查風機轉(zhuan)動是否(fou)靈活。如(ru)各(ge)處溫(wen)度正常，而盤(pan)車時(shi)有時(shi)輕時(shi)重的感覺(jue)，有“蹩勁”現象，即可確(que)定兩轉(zhuan)子(zi)碰撞(zhuang)。如(ru)打開機上殼(ke)，會(hui)觀察(cha)到轉(zhuan)子(zi)表(biao)(biao)面(mian)有碰撞(zhuang)痕(hen)跡。如(ru)轉(zhuan)子(zi)的一側表(biao)(biao)面(mian)發亮，有麻點。
然(ran)后(hou)可以拆下齒(chi)輪(lun)箱(xiang)外殼，用(yong)(yong)(yong)手(shou)錘(chui)敲(qiao)擊齒(chi)輪(lun)端(duan)六角(jiao)緊固螺母，觀察是(shi)(shi)否(fou)松動(dong)(dong)，止退墊片是(shi)(shi)否(fou)失效。再用(yong)(yong)(yong)撞擊法檢查主(zhu)動(dong)(dong)軸上齒(chi)輪(lun)輪(lun)轂與(yu)(yu)鍵配合是(shi)(shi)否(fou)松動(dong)(dong)。這種方法是(shi)(shi)用(yong)(yong)(yong)一根硬木放(fang)在間隙(xi)最小處的兩轉(zhuan)子之(zhi)間，用(yong)(yong)(yong)手(shou)或工具(ju)轉(zhuan)動(dong)(dong)聯軸器，使兩轉(zhuan)子與(yu)(yu)硬木撞擊。撞擊時(shi)，觀察齒(chi)輪(lun)與(yu)(yu)軸有無相對(dui)運(yun)動(dong)(dong)。撞擊后(hou)，再用(yong)(yong)(yong)塞(sai)尺復(fu)測此處間隙(xi)。如撞擊時(shi)齒(chi)輪(lun)與(yu)(yu)軸有相對(dui)運(yun)動(dong)(dong)，撞擊后(hou)兩轉(zhuan)子間隙(xi)發生(sheng)變化，即可確定(ding)主(zhu)動(dong)(dong)齒(chi)輪(lun)輪(lun)轂與(yu)(yu)鍵配合松動(dong)(dong)。這樣，配換(huan)新鍵就可排除兩轉(zhuan)子之(zhi)間的碰撞現象。修理時(shi)間僅需2h，從而提高了羅茨鼓風機的運(yun)轉(zhuan)率(lv)。
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