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。渣漿泵用平湖機械密封的工作原理要求平湖機械密封內部無任何雜質，在組裝平湖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平湖機械密封嚴重漏泄。必要時可以制作工裝(zhuang)(zhuang)在組裝(zhuang)(zhuang)前水壓試(shi)驗，檢查動靜環(huan)座是否存(cun)在影(ying)響密封的缺(que)陷。

　　渣漿平湖泵用平湖機械密封由于密封面變形所引起的，而且平湖機械密封面泄漏的概率是很高的。如果泵在啟動時就發生平湖泵用平湖機械密封泄漏，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平湖機械密封的變形(xing)情況(kuang)。如果發生變形(xing)，用(yong)平晶檢查密(mi)封面(mian)(mian)的干涉(she)帶(dai)的變化情況(kuang)，密(mi)封面(mian)(mian)變形(xing)存在(zai)于(yu)動環和靜環之(zhi)間。

　　壓(ya)缸(gang)體(ti)動(dong)(dong)(dong)(dong)(dong)態密(mi)(mi)(mi)封(feng)系統(tong)采(cai)用(yong)(yong)的(de)(de)(de)(de)是主(zhu)密(mi)(mi)(mi)封(feng)設計(ji)，一(yi)(yi)般都用(yong)(yong)U型密(mi)(mi)(mi)封(feng)圈(quan)。液壓(ya)缸(gang)體(ti)的(de)(de)(de)(de)往復式(shi)動(dong)(dong)(dong)(dong)(dong)態密(mi)(mi)(mi)封(feng)系統(tong)的(de)(de)(de)(de)設計(ji)，開始使用(yong)(yong)了更加復雜的(de)(de)(de)(de)U型圈(quan)和同軸(zhou)密(mi)(mi)(mi)封(feng)組件的(de)(de)(de)(de)復合(he)式(shi)設計(ji)。密(mi)(mi)(mi)封(feng)的(de)(de)(de)(de)靜環(huan)(huan)通(tong)常固定在(zai)殼體(ti)上，動(dong)(dong)(dong)(dong)(dong)環(huan)(huan)通(tong)過彈(dan)(dan)簧、彈(dan)(dan)簧座與(yu)軸(zhou)一(yi)(yi)同旋轉。靜環(huan)(huan)與(yu)殼體(ti)、動(dong)(dong)(dong)(dong)(dong)環(huan)(huan)與(yu)軸(zhou)形(xing)成的(de)(de)(de)(de)間隙用(yong)(yong)成型填料密(mi)(mi)(mi)封(feng)。在(zai)動(dong)(dong)(dong)(dong)(dong)環(huan)(huan)和靜環(huan)(huan)接(jie)觸的(de)(de)(de)(de)端面(mian)(mian)形(xing)成相(xiang)對滑動(dong)(dong)(dong)(dong)(dong)面(mian)(mian)，即動(dong)(dong)(dong)(dong)(dong)密(mi)(mi)(mi)封(feng)面(mian)(mian)。為保證密(mi)(mi)(mi)封(feng)良好，動(dong)(dong)(dong)(dong)(dong)密(mi)(mi)(mi)封(feng)面(mian)(mian)應(ying)十分(fen)平(ping)直和光潔。彈(dan)(dan)簧力(li)和被密(mi)(mi)(mi)封(feng)的(de)(de)(de)(de)流體(ti)壓(ya)力(li)使動(dong)(dong)(dong)(dong)(dong)環(huan)(huan)貼(tie)緊靜環(huan)(huan)。因動(dong)(dong)(dong)(dong)(dong)環(huan)(huan)與(yu)軸(zhou)通(tong)過彈(dan)(dan)簧連(lian)接(jie)，動(dong)(dong)(dong)(dong)(dong)環(huan)(huan)和靜環(huan)(huan)間貼(tie)合(he)性受(shou)軸(zhou)的(de)(de)(de)(de)振動(dong)(dong)(dong)(dong)(dong)和擺動(dong)(dong)(dong)(dong)(dong)影響(xiang)較小。靜環(huan)(huan)一(yi)(yi)般常用(yong)(yong)潤滑性好的(de)(de)(de)(de)軟質材(cai)料如石墨、填充聚四(si)氟乙(yi)烯等(deng)，動(dong)(dong)(dong)(dong)(dong)環(huan)(huan)多用(yong)(yong)硬質合(he)金(jin)、陶(tao)瓷等(deng)材(cai)料制造。