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。渣漿泵用侯馬機械密封的工作原理要求侯馬機械密封內部無任何雜質，在組裝侯馬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侯馬機械密封嚴重(zhong)漏泄。必要時可以制(zhi)作工(gong)裝在組(zu)裝前水壓試驗(yan)，檢(jian)查動靜環座是否(fou)存(cun)在影響(xiang)密(mi)封的缺陷。

　　渣漿侯馬泵用侯馬機械密封由于密封面變形所引起的，而且侯馬機械密封面泄漏的概率是很高的。如果泵在啟動時就發生侯馬泵用侯馬機械密封泄漏，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侯馬機械密封的(de)變形情況。如果發生變形，用平晶檢查密封(feng)面的(de)干涉帶的(de)變化情況，密封(feng)面變形存在(zai)于(yu)動環(huan)和(he)靜環(huan)之間(jian)。

　　壓缸體(ti)動(dong)(dong)(dong)態密封(feng)系統(tong)采用(yong)(yong)的(de)(de)(de)是主(zhu)密封(feng)設(she)(she)(she)計，一般(ban)(ban)都用(yong)(yong)U型(xing)密封(feng)圈。液壓缸體(ti)的(de)(de)(de)往復式(shi)(shi)動(dong)(dong)(dong)態密封(feng)系統(tong)的(de)(de)(de)設(she)(she)(she)計，開始使用(yong)(yong)了更加復雜的(de)(de)(de)U型(xing)圈和同軸(zhou)(zhou)密封(feng)組件的(de)(de)(de)復合式(shi)(shi)設(she)(she)(she)計。密封(feng)的(de)(de)(de)靜(jing)環(huan)(huan)(huan)(huan)通常固定在殼體(ti)上，動(dong)(dong)(dong)環(huan)(huan)(huan)(huan)通過彈(dan)簧、彈(dan)簧座與軸(zhou)(zhou)一同旋轉。靜(jing)環(huan)(huan)(huan)(huan)與殼體(ti)、動(dong)(dong)(dong)環(huan)(huan)(huan)(huan)與軸(zhou)(zhou)形(xing)成的(de)(de)(de)間隙用(yong)(yong)成型(xing)填(tian)料(liao)密封(feng)。在動(dong)(dong)(dong)環(huan)(huan)(huan)(huan)和靜(jing)環(huan)(huan)(huan)(huan)接觸的(de)(de)(de)端(duan)面(mian)(mian)形(xing)成相(xiang)對滑動(dong)(dong)(dong)面(mian)(mian)，即動(dong)(dong)(dong)密封(feng)面(mian)(mian)。為保證密封(feng)良好，動(dong)(dong)(dong)密封(feng)面(mian)(mian)應十分平直和光潔。彈(dan)簧力(li)和被密封(feng)的(de)(de)(de)流體(ti)壓力(li)使動(dong)(dong)(dong)環(huan)(huan)(huan)(huan)貼(tie)緊靜(jing)環(huan)(huan)(huan)(huan)。因動(dong)(dong)(dong)環(huan)(huan)(huan)(huan)與軸(zhou)(zhou)通過彈(dan)簧連接，動(dong)(dong)(dong)環(huan)(huan)(huan)(huan)和靜(jing)環(huan)(huan)(huan)(huan)間貼(tie)合性受軸(zhou)(zhou)的(de)(de)(de)振動(dong)(dong)(dong)和擺動(dong)(dong)(dong)影響(xiang)較小。靜(jing)環(huan)(huan)(huan)(huan)一般(ban)(ban)常用(yong)(yong)潤滑性好的(de)(de)(de)軟質材(cai)(cai)料(liao)如(ru)石(shi)墨、填(tian)充(chong)聚四(si)氟乙烯(xi)等，動(dong)(dong)(dong)環(huan)(huan)(huan)(huan)多用(yong)(yong)硬質合金(jin)、陶(tao)瓷等材(cai)(cai)料(liao)制造。