反壓狀態是不良的工作狀態，介質中的顆粒、雜質很容易進入密封面，使密封失效。磨軸的主要件為橡膠波紋管，且由于上端密封面處于不良潤滑狀態，動靜環之間的摩擦力矩大于橡膠波紋管與軸之間的傳遞轉矩，從而發生相對轉動。動、靜環輔助密封由于受到污水中的弱酸、弱堿的腐蝕，橡膠件已無彈性。渣漿泵用蓮都機械密封的工作原理要求蓮都機械密封內部無任何雜質，在組裝蓮都機械密封前要徹底清掃動環、靜環、軸套等部件，檢查動靜環表面是否存在劃痕、裂紋等缺陷，這些缺陷存在會造成蓮都機械密封嚴重漏泄。必要(yao)時可以制(zhi)作工裝在組裝前水壓試驗，檢查(cha)動靜環座(zuo)是否存(cun)在影(ying)響密(mi)封的缺陷。

　　渣漿蓮都泵用蓮都機械密封由于密封面變形所引起的，而且蓮都機械密封面泄漏的概率是很高的。如果泵在啟動時就發生蓮都泵用蓮都機械密封泄漏，而拆查密封面時看不見有損壞的地方，這時就應該用平晶檢查蓮都機械密封的變(bian)形情(qing)況(kuang)。如果發生變(bian)形，用平晶檢查(cha)密封面的干(gan)涉帶的變(bian)化情(qing)況(kuang)，密封面變(bian)形存(cun)在于(yu)動環和(he)靜環之(zhi)間。

　　壓(ya)缸體(ti)動(dong)(dong)(dong)(dong)(dong)(dong)態密(mi)(mi)(mi)封(feng)(feng)系統(tong)采用(yong)的(de)是主密(mi)(mi)(mi)封(feng)(feng)設(she)計(ji)(ji)，一般都用(yong)U型密(mi)(mi)(mi)封(feng)(feng)圈。液壓(ya)缸體(ti)的(de)往復式動(dong)(dong)(dong)(dong)(dong)(dong)態密(mi)(mi)(mi)封(feng)(feng)系統(tong)的(de)設(she)計(ji)(ji)，開始使(shi)用(yong)了更(geng)加(jia)復雜(za)的(de)U型圈和(he)同軸密(mi)(mi)(mi)封(feng)(feng)組件(jian)的(de)復合式設(she)計(ji)(ji)。密(mi)(mi)(mi)封(feng)(feng)的(de)靜環(huan)通(tong)常(chang)固(gu)定在殼(ke)體(ti)上，動(dong)(dong)(dong)(dong)(dong)(dong)環(huan)通(tong)過(guo)彈(dan)簧、彈(dan)簧座(zuo)與軸一同旋轉。靜環(huan)與殼(ke)體(ti)、動(dong)(dong)(dong)(dong)(dong)(dong)環(huan)與軸形成(cheng)的(de)間(jian)隙用(yong)成(cheng)型填(tian)料(liao)密(mi)(mi)(mi)封(feng)(feng)。在動(dong)(dong)(dong)(dong)(dong)(dong)環(huan)和(he)靜環(huan)接(jie)(jie)觸的(de)端面(mian)(mian)形成(cheng)相對(dui)滑動(dong)(dong)(dong)(dong)(dong)(dong)面(mian)(mian)，即動(dong)(dong)(dong)(dong)(dong)(dong)密(mi)(mi)(mi)封(feng)(feng)面(mian)(mian)。為保證密(mi)(mi)(mi)封(feng)(feng)良(liang)好(hao)，動(dong)(dong)(dong)(dong)(dong)(dong)密(mi)(mi)(mi)封(feng)(feng)面(mian)(mian)應十分平直和(he)光潔(jie)。彈(dan)簧力(li)和(he)被密(mi)(mi)(mi)封(feng)(feng)的(de)流體(ti)壓(ya)力(li)使(shi)動(dong)(dong)(dong)(dong)(dong)(dong)環(huan)貼(tie)緊靜環(huan)。因動(dong)(dong)(dong)(dong)(dong)(dong)環(huan)與軸通(tong)過(guo)彈(dan)簧連接(jie)(jie)，動(dong)(dong)(dong)(dong)(dong)(dong)環(huan)和(he)靜環(huan)間(jian)貼(tie)合性受軸的(de)振(zhen)動(dong)(dong)(dong)(dong)(dong)(dong)和(he)擺動(dong)(dong)(dong)(dong)(dong)(dong)影響較小。靜環(huan)一般常(chang)用(yong)潤滑性好(hao)的(de)軟質材料(liao)如(ru)石墨、填(tian)充聚四(si)氟(fu)乙烯等，動(dong)(dong)(dong)(dong)(dong)(dong)環(huan)多用(yong)硬質合金、陶瓷(ci)等材料(liao)制造。