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。渣漿通河泵用通河機械密封的工作原理要求通河機械密封內部無任何雜質，在組裝通河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通河機械密封嚴(yan)重漏泄。必要時(shi)可(ke)以制作工裝在(zai)組裝前水壓試驗，檢查動(dong)靜環座是否存在(zai)影(ying)響(xiang)密封的缺(que)陷。

　　渣漿通河泵用通河機械密封由于密封面變形所引起的，而且通河機械密封面泄漏的概率是很高的。如果泵在啟動時就發生通河泵用通河機械密封泄漏，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通河機械密封的變(bian)形情(qing)況。如果發生變(bian)形，用平晶檢查密封面(mian)的干涉帶的變(bian)化情(qing)況，密封面(mian)變(bian)形存在于動環和靜環之間(jian)。

　　壓(ya)缸體(ti)動(dong)(dong)(dong)(dong)(dong)態(tai)密封(feng)(feng)系統采(cai)用(yong)(yong)的(de)是(shi)主密封(feng)(feng)設計，一(yi)般(ban)都用(yong)(yong)U型密封(feng)(feng)圈。液壓(ya)缸體(ti)的(de)往復式動(dong)(dong)(dong)(dong)(dong)態(tai)密封(feng)(feng)系統的(de)設計，開始使(shi)用(yong)(yong)了更(geng)加(jia)復雜的(de)U型圈和(he)同(tong)軸密封(feng)(feng)組件的(de)復合(he)式設計。密封(feng)(feng)的(de)靜(jing)環(huan)(huan)通常固(gu)定在殼體(ti)上，動(dong)(dong)(dong)(dong)(dong)環(huan)(huan)通過(guo)(guo)彈(dan)簧、彈(dan)簧座與軸一(yi)同(tong)旋轉。靜(jing)環(huan)(huan)與殼體(ti)、動(dong)(dong)(dong)(dong)(dong)環(huan)(huan)與軸形成的(de)間(jian)隙用(yong)(yong)成型填料密封(feng)(feng)。在動(dong)(dong)(dong)(dong)(dong)環(huan)(huan)和(he)靜(jing)環(huan)(huan)接觸的(de)端(duan)面形成相(xiang)對滑(hua)動(dong)(dong)(dong)(dong)(dong)面，即動(dong)(dong)(dong)(dong)(dong)密封(feng)(feng)面。為保證(zheng)密封(feng)(feng)良好，動(dong)(dong)(dong)(dong)(dong)密封(feng)(feng)面應十分平直和(he)光(guang)潔。彈(dan)簧力和(he)被密封(feng)(feng)的(de)流體(ti)壓(ya)力使(shi)動(dong)(dong)(dong)(dong)(dong)環(huan)(huan)貼(tie)緊靜(jing)環(huan)(huan)。因動(dong)(dong)(dong)(dong)(dong)環(huan)(huan)與軸通過(guo)(guo)彈(dan)簧連接，動(dong)(dong)(dong)(dong)(dong)環(huan)(huan)和(he)靜(jing)環(huan)(huan)間(jian)貼(tie)合(he)性受(shou)軸的(de)振動(dong)(dong)(dong)(dong)(dong)和(he)擺動(dong)(dong)(dong)(dong)(dong)影響較小(xiao)。靜(jing)環(huan)(huan)一(yi)般(ban)常用(yong)(yong)潤滑(hua)性好的(de)軟質(zhi)材料如石墨、填充聚(ju)四(si)氟(fu)乙(yi)烯等(deng)，動(dong)(dong)(dong)(dong)(dong)環(huan)(huan)多用(yong)(yong)硬質(zhi)合(he)金(jin)、陶(tao)瓷等(deng)材料制造。