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。渣漿泵用依安機械密封的工作原理要求依安機械密封內部無任何雜質，在組裝依安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依安機械密封嚴重漏泄。必要(yao)時(shi)可以制作工裝在組(zu)裝前水壓試(shi)驗，檢查動靜環座是否存在影(ying)響(xiang)密封的(de)缺陷。

　　渣漿依安泵用依安機械密封由于密封面變形所引起的，而且依安機械密封面泄漏的概率是很高的。如果泵在啟動時就發生依安泵用依安機械密封泄漏，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依安機械密封的變(bian)形(xing)情況。如果發生變(bian)形(xing)，用平晶檢查(cha)密封(feng)(feng)面的干涉帶的變(bian)化情況，密封(feng)(feng)面變(bian)形(xing)存(cun)在于動環和靜(jing)環之間。

　　壓缸(gang)體動(dong)(dong)態密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)系統采用(yong)(yong)(yong)的(de)(de)是(shi)主密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)設計(ji)(ji)，一(yi)(yi)(yi)般都用(yong)(yong)(yong)U型密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)圈。液壓缸(gang)體的(de)(de)往(wang)復(fu)(fu)式動(dong)(dong)態密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)系統的(de)(de)設計(ji)(ji)，開始使(shi)用(yong)(yong)(yong)了更(geng)加復(fu)(fu)雜(za)的(de)(de)U型圈和(he)(he)(he)同(tong)(tong)軸密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)組(zu)件的(de)(de)復(fu)(fu)合(he)式設計(ji)(ji)。密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)的(de)(de)靜(jing)(jing)環(huan)(huan)(huan)通(tong)常固定(ding)在殼體上，動(dong)(dong)環(huan)(huan)(huan)通(tong)過(guo)彈(dan)簧、彈(dan)簧座(zuo)與軸一(yi)(yi)(yi)同(tong)(tong)旋轉。靜(jing)(jing)環(huan)(huan)(huan)與殼體、動(dong)(dong)環(huan)(huan)(huan)與軸形成(cheng)的(de)(de)間隙用(yong)(yong)(yong)成(cheng)型填(tian)料密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)。在動(dong)(dong)環(huan)(huan)(huan)和(he)(he)(he)靜(jing)(jing)環(huan)(huan)(huan)接(jie)觸的(de)(de)端面(mian)形成(cheng)相(xiang)對滑(hua)動(dong)(dong)面(mian)，即(ji)動(dong)(dong)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)面(mian)。為(wei)保(bao)證密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)良好，動(dong)(dong)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)面(mian)應十(shi)分平直(zhi)和(he)(he)(he)光潔(jie)。彈(dan)簧力和(he)(he)(he)被密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)的(de)(de)流體壓力使(shi)動(dong)(dong)環(huan)(huan)(huan)貼緊靜(jing)(jing)環(huan)(huan)(huan)。因動(dong)(dong)環(huan)(huan)(huan)與軸通(tong)過(guo)彈(dan)簧連(lian)接(jie)，動(dong)(dong)環(huan)(huan)(huan)和(he)(he)(he)靜(jing)(jing)環(huan)(huan)(huan)間貼合(he)性(xing)受軸的(de)(de)振動(dong)(dong)和(he)(he)(he)擺動(dong)(dong)影響較小。靜(jing)(jing)環(huan)(huan)(huan)一(yi)(yi)(yi)般常用(yong)(yong)(yong)潤滑(hua)性(xing)好的(de)(de)軟質材(cai)料如石(shi)墨(mo)、填(tian)充聚四氟乙烯等，動(dong)(dong)環(huan)(huan)(huan)多用(yong)(yong)(yong)硬質合(he)金、陶瓷(ci)等材(cai)料制造。