市中機械密封利用機(ji)械方式傳(chuan)(chuan)(chuan)遞動(dong)(dong)(dong)(dong)力和(he)(he)(he)運動(dong)(dong)(dong)(dong)的傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)(dong)，機(ji)械傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)(dong)在機(ji)械工(gong)程中應用非常廣泛，有多種(zhong)形(xing)式，主要(yao)包括皮帶傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)(dong)、齒輪傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)(dong)、鏈傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)(dong)、蝸桿蝸輪傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)(dong)、齒輪齒條傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)(dong)和(he)(he)(he)螺旋(xuan)傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)(dong)等。齒輪傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)(dong)能(neng)(neng)(neng)夠用于大功率(lv)(lv)的場合，傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)(dong)比(bi)準確(que)(que)，但(dan)(dan)一般要(yao)求較(jiao)高(gao)的制造精度和(he)(he)(he)安(an)裝精度。還有一類是靠機(ji)件間(jian)的摩(mo)擦(ca)力傳(chuan)(chuan)(chuan)遞動(dong)(dong)(dong)(dong)力和(he)(he)(he)運動(dong)(dong)(dong)(dong)的摩(mo)擦(ca)傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)(dong)，包括帶傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)(dong)、繩(sheng)傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)(dong)和(he)(he)(he)摩(mo)擦(ca)輪傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)(dong)等。摩(mo)擦(ca)傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)(dong)容易(yi)實現無級(ji)變速(su)，可以適應軸間(jian)距較(jiao)大的傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)(dong)場合，而過(guo)載打滑(hua)還能(neng)(neng)(neng)起到緩(huan)沖(chong)和(he)(he)(he)保護傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)(dong)裝置的作用，但(dan)(dan)這種(zhong)傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)(dong)一般不能(neng)(neng)(neng)用于大功率(lv)(lv)的場合，也(ye)不能(neng)(neng)(neng)保證準確(que)(que)的傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)(dong)比(bi)。

　　傳動形式多，但是市中機械密封的更換工(gong)作大同(tong)小異，首先拆前需確認電機(ji)處于檢修(xiu)狀態，擰下加油螺塞，用(yong)吸(xi)管把(ba)密封(feng)座腔(qiang)內(nei)的潤滑油吸(xi)出。準備(bei)好放(fang)置泵零件的工(gong)作臺及拆裝工(gong)具(ju)，切(qie)勿任(ren)意亂(luan)放(fang)亂(luan)用(yong)，避免碰壞泵的零部件。

　　拆對分式(shi)聯軸器：先把(ba)聯軸器的(de)固定(ding)內六角螺(luo)釘擰下(xia)(xia)來，再輕(qing)輕(qing)把(ba)聯軸器的(de)一(yi)(yi)半從軸上慢(man)(man)慢(man)(man)拉下(xia)(xia)，注意不要掉了，再用(yong)梅花(hua)扳手(shou)擰下(xia)(xia)泵(beng)軸吊緊螺(luo)栓和擋塊，讓葉輪慢(man)(man)慢(man)(man)下(xia)(xia)沉至泵(beng)體，然后拆下(xia)(xia)另(ling)外一(yi)(yi)半聯軸器，拿下(xia)(xia)泵(beng)軸擋圈。

　　拆卸市中機械密封：抓(zhua)住密封彈簧順著(zhu)泵軸往上提，就能(neng)拆下來了。

　　拆卸(xie)(xie)并(bing)清洗軸(zhou)(zhou)承(cheng)座：先輕輕松動一下(xia)(xia)軸(zhou)(zhou)承(cheng)座后用拆卸(xie)(xie)螺栓頂(ding)起(qi)軸(zhou)(zhou)承(cheng)座，并(bing)且沿(yan)著泵軸(zhou)(zhou)往上(shang)提而(er)卸(xie)(xie)下(xia)(xia)，再用噴氣(qi)燃料清洗軸(zhou)(zhou)承(cheng)及座，裝前晾干并(bing)涂抹少許20號機械油用來潤滑保護。

　　拆密(mi)封(feng)座：擰下密(mi)封(feng)座壓(ya)緊螺母，輕輕卸下密(mi)封(feng)座并清洗。

　　市中機械密封裝配(pei)：在動、靜環鏡(jing)面上涂一層潔(jie)凈的(de)20號潤滑(hua)油，導軸(zhou)承(cheng)座也抹上潤滑(hua)油，先把靜環輕(qing)輕(qing)定位裝入導軸(zhou)承(cheng)座，再在泵軸(zhou)上抹上潤滑(hua)油，把動環部(bu)(bu)分(fen)輕(qing)輕(qing)裝入泵軸(zhou)上，用(yong)手(shou)輕(qing)推密封環應能伸縮自如，注意(yi)動、靜環部(bu)(bu)分(fen)的(de)防轉部(bu)(bu)位需裝配(pei)到位。

　　裝(zhuang)(zhuang)聯(lian)(lian)軸器(qi)(qi)：在電機軸頭上(shang)(shang)裝(zhuang)(zhuang)上(shang)(shang)擋圈(quan)(quan)，裝(zhuang)(zhuang)上(shang)(shang)一(yi)半聯(lian)(lian)軸器(qi)(qi)，再在泵(beng)軸端和聯(lian)(lian)軸器(qi)(qi)槽內(nei)裝(zhuang)(zhuang)上(shang)(shang)擋塊(kuai)并用梅花扳(ban)手擰緊螺栓；再裝(zhuang)(zhuang)上(shang)(shang)另一(yi)半聯(lian)(lian)軸器(qi)(qi)擰上(shang)(shang)內(nei)六角螺釘。安裝(zhuang)(zhuang)聯(lian)(lian)軸器(qi)(qi)正(zheng)確(que)的檢查要(yao)求：對分(fen)式聯(lian)(lian)軸器(qi)(qi)上(shang)(shang)下間隙需要(yao)均(jun)勻(yun)，用手盤動聯(lian)(lian)軸器(qi)(qi)幾圈(quan)(quan)檢查轉動的靈活性。

　　裝(zhuang)密封(feng)座：先(xian)將密封(feng)座裝(zhuang)入橡(xiang)膠油封(feng)，再把密封(feng)座裝(zhuang)入泵蓋(gai)(gai)(gai)并(bing)壓(ya)(ya)(ya)在軸(zhou)承座上，擰緊螺母，確保(bao)所有安裝(zhuang)螺釘(ding)緊固(gu)。當安裝(zhuang)螺釘(ding)被用(yong)作(zuo)密封(feng)與軸(zhou)之間(jian)(jian)的驅動時(shi)(shi)，軸(zhou)應打埋頭孔來加固(gu)連(lian)接(jie)，緊固(gu)壓(ya)(ya)(ya)蓋(gai)(gai)(gai)螺栓時(shi)(shi)應該平穩緊固(gu)，并(bing)且(qie)不(bu)要使壓(ya)(ya)(ya)蓋(gai)(gai)(gai)受彈力。在可(ke)能(neng)的地方使用(yong)4個以上螺釘(ding)的等間(jian)(jian)距壓(ya)(ya)(ya)蓋(gai)(gai)(gai)，緊固(gu)壓(ya)(ya)(ya)蓋(gai)(gai)(gai)螺栓時(shi)(shi)，用(yong)塞(sai)尺(chi)檢查軸(zhou)與壓(ya)(ya)(ya)蓋(gai)(gai)(gai)之間(jian)(jian)的間(jian)(jian)隙，這在密封(feng)腔對(dui)壓(ya)(ya)(ya)蓋(gai)(gai)(gai)不(bu)導向時(shi)(shi)，顯(xian)得(de)特別(bie)重要，因(yin)為壓(ya)(ya)(ya)蓋(gai)(gai)(gai)必須對(dui)中(zhong)。