三道鎮機械密封利用(yong)機(ji)械方(fang)式(shi)(shi)傳(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)遞動(dong)(dong)(dong)力和(he)運動(dong)(dong)(dong)的傳(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)動(dong)(dong)(dong)，機(ji)械傳(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)動(dong)(dong)(dong)在機(ji)械工程中應(ying)用(yong)非常廣(guang)泛，有多種形式(shi)(shi)，主(zhu)要包括皮帶(dai)傳(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)動(dong)(dong)(dong)、齒(chi)(chi)輪(lun)(lun)傳(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)動(dong)(dong)(dong)、鏈傳(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)動(dong)(dong)(dong)、蝸桿蝸輪(lun)(lun)傳(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)動(dong)(dong)(dong)、齒(chi)(chi)輪(lun)(lun)齒(chi)(chi)條傳(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)動(dong)(dong)(dong)和(he)螺(luo)旋傳(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)動(dong)(dong)(dong)等(deng)。齒(chi)(chi)輪(lun)(lun)傳(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)動(dong)(dong)(dong)能夠用(yong)于(yu)大功率(lv)的場合，傳(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)動(dong)(dong)(dong)比準確，但(dan)一(yi)般要求較高的制造精度(du)和(he)安裝(zhuang)精度(du)。還有一(yi)類是靠機(ji)件間的摩擦(ca)力傳(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)遞動(dong)(dong)(dong)力和(he)運動(dong)(dong)(dong)的摩擦(ca)傳(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)動(dong)(dong)(dong)，包括帶(dai)傳(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)動(dong)(dong)(dong)、繩傳(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)動(dong)(dong)(dong)和(he)摩擦(ca)輪(lun)(lun)傳(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)動(dong)(dong)(dong)等(deng)。摩擦(ca)傳(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)動(dong)(dong)(dong)容易實現無級變速，可以適應(ying)軸間距(ju)較大的傳(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)動(dong)(dong)(dong)場合，而過載打滑還能起到緩沖和(he)保(bao)(bao)護(hu)傳(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)動(dong)(dong)(dong)裝(zhuang)置的作用(yong)，但(dan)這種傳(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)動(dong)(dong)(dong)一(yi)般不能用(yong)于(yu)大功率(lv)的場合，也不能保(bao)(bao)證(zheng)準確的傳(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)(chuan)動(dong)(dong)(dong)比。

　　傳動形式多，但是三道鎮機械密封的更換工(gong)作(zuo)大同(tong)小(xiao)異，首(shou)先拆前(qian)需(xu)確認電機處于檢修狀態，擰下加油螺塞，用(yong)吸(xi)管(guan)把密封座(zuo)腔內的潤滑油吸(xi)出。準(zhun)備(bei)好(hao)放置泵零件(jian)的工(gong)作(zuo)臺及拆裝工(gong)具，切勿任意亂放亂用(yong)，避免碰壞泵的零部件(jian)。

　　拆(chai)對分式聯軸器：先把聯軸器的固定(ding)內六(liu)角(jiao)螺釘擰(ning)下(xia)來，再(zai)輕輕把聯軸器的一半從軸上(shang)慢(man)(man)(man)慢(man)(man)(man)拉下(xia)，注意不要(yao)掉了(le)，再(zai)用梅(mei)花扳手擰(ning)下(xia)泵(beng)(beng)軸吊緊螺栓和擋(dang)塊，讓(rang)葉輪(lun)慢(man)(man)(man)慢(man)(man)(man)下(xia)沉(chen)至泵(beng)(beng)體，然后拆(chai)下(xia)另外一半聯軸器，拿下(xia)泵(beng)(beng)軸擋(dang)圈。

　　拆卸三道鎮機械密封：抓住密封彈(dan)簧順著泵軸往(wang)上提，就(jiu)能拆下來(lai)了。

　　拆(chai)卸并(bing)清洗(xi)軸(zhou)(zhou)承座(zuo)：先輕(qing)輕(qing)松動(dong)一下軸(zhou)(zhou)承座(zuo)后用拆(chai)卸螺(luo)栓頂(ding)起軸(zhou)(zhou)承座(zuo)，并(bing)且沿著泵軸(zhou)(zhou)往(wang)上(shang)提而卸下，再用噴氣燃料清洗(xi)軸(zhou)(zhou)承及座(zuo)，裝前晾干并(bing)涂抹少許20號機械油用來潤滑保護。

　　拆密封(feng)(feng)座(zuo)：擰下(xia)密封(feng)(feng)座(zuo)壓緊螺(luo)母，輕輕卸下(xia)密封(feng)(feng)座(zuo)并清洗。

　　三道鎮機械密封裝(zhuang)(zhuang)配：在動、靜(jing)環(huan)鏡面上(shang)涂一層(ceng)潔凈的20號潤(run)滑油，導軸(zhou)(zhou)(zhou)承座也(ye)抹(mo)上(shang)潤(run)滑油，先把靜(jing)環(huan)輕(qing)輕(qing)定(ding)位裝(zhuang)(zhuang)入導軸(zhou)(zhou)(zhou)承座，再在泵軸(zhou)(zhou)(zhou)上(shang)抹(mo)上(shang)潤(run)滑油，把動環(huan)部(bu)分輕(qing)輕(qing)裝(zhuang)(zhuang)入泵軸(zhou)(zhou)(zhou)上(shang)，用(yong)手輕(qing)推密封環(huan)應能伸縮自如，注(zhu)意動、靜(jing)環(huan)部(bu)分的防轉部(bu)位需裝(zhuang)(zhuang)配到位。

　　裝(zhuang)聯(lian)軸(zhou)(zhou)器(qi)(qi)：在電機軸(zhou)(zhou)頭上(shang)裝(zhuang)上(shang)擋圈(quan)，裝(zhuang)上(shang)一(yi)半聯(lian)軸(zhou)(zhou)器(qi)(qi)，再(zai)在泵軸(zhou)(zhou)端和聯(lian)軸(zhou)(zhou)器(qi)(qi)槽內(nei)裝(zhuang)上(shang)擋塊并用(yong)梅花扳手擰(ning)緊螺(luo)栓；再(zai)裝(zhuang)上(shang)另一(yi)半聯(lian)軸(zhou)(zhou)器(qi)(qi)擰(ning)上(shang)內(nei)六(liu)角螺(luo)釘(ding)。安裝(zhuang)聯(lian)軸(zhou)(zhou)器(qi)(qi)正確的(de)檢(jian)查(cha)要求：對分式聯(lian)軸(zhou)(zhou)器(qi)(qi)上(shang)下間隙需(xu)要均勻，用(yong)手盤動聯(lian)軸(zhou)(zhou)器(qi)(qi)幾圈(quan)檢(jian)查(cha)轉(zhuan)動的(de)靈活性。

　　裝(zhuang)密(mi)封座：先將密(mi)封座裝(zhuang)入(ru)橡膠油封，再把(ba)密(mi)封座裝(zhuang)入(ru)泵蓋(gai)(gai)并壓(ya)(ya)在軸(zhou)承座上，擰緊(jin)螺(luo)母，確保所(suo)有(you)安(an)裝(zhuang)螺(luo)釘緊(jin)固(gu)。當安(an)裝(zhuang)螺(luo)釘被(bei)用(yong)作密(mi)封與軸(zhou)之間(jian)(jian)的(de)驅動時(shi)，軸(zhou)應打埋頭(tou)孔來加固(gu)連接，緊(jin)固(gu)壓(ya)(ya)蓋(gai)(gai)螺(luo)栓時(shi)應該(gai)平穩緊(jin)固(gu)，并且不要使(shi)壓(ya)(ya)蓋(gai)(gai)受彈(dan)力。在可(ke)能的(de)地(di)方使(shi)用(yong)4個(ge)以(yi)上螺(luo)釘的(de)等間(jian)(jian)距壓(ya)(ya)蓋(gai)(gai)，緊(jin)固(gu)壓(ya)(ya)蓋(gai)(gai)螺(luo)栓時(shi)，用(yong)塞尺檢查軸(zhou)與壓(ya)(ya)蓋(gai)(gai)之間(jian)(jian)的(de)間(jian)(jian)隙，這在密(mi)封腔對壓(ya)(ya)蓋(gai)(gai)不導向(xiang)時(shi)，顯得特別重要，因為壓(ya)(ya)蓋(gai)(gai)必須對中。