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。渣漿萬榮泵用萬榮機械密封的工作原理要求萬榮機械密封內部無任何雜質，在組裝萬榮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萬榮機械密封嚴重漏(lou)泄。必(bi)要時可(ke)以(yi)制作工裝在組裝前水壓試驗，檢查動靜環座是否存在影(ying)響密(mi)封的缺陷(xian)。

　　渣漿萬榮泵用萬榮機械密封由于密封面變形所引起的，而且萬榮機械密封面泄漏的概率是很高的。如果泵在啟動時就發生萬榮泵用萬榮機械密封泄漏，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萬榮機械密封的(de)變(bian)形情況(kuang)。如果發生變(bian)形，用平晶檢查密封面的(de)干涉(she)帶的(de)變(bian)化情況(kuang)，密封面變(bian)形存在于(yu)動環(huan)和(he)靜(jing)環(huan)之間(jian)。

　　壓缸(gang)體(ti)(ti)動(dong)(dong)(dong)(dong)(dong)(dong)(dong)態密(mi)(mi)封(feng)系統(tong)采用的(de)(de)(de)是主密(mi)(mi)封(feng)設計，一般都用U型(xing)密(mi)(mi)封(feng)圈。液(ye)壓缸(gang)體(ti)(ti)的(de)(de)(de)往復(fu)式動(dong)(dong)(dong)(dong)(dong)(dong)(dong)態密(mi)(mi)封(feng)系統(tong)的(de)(de)(de)設計，開始使(shi)用了更(geng)加復(fu)雜的(de)(de)(de)U型(xing)圈和(he)同軸(zhou)密(mi)(mi)封(feng)組件的(de)(de)(de)復(fu)合式設計。密(mi)(mi)封(feng)的(de)(de)(de)靜(jing)環(huan)(huan)(huan)(huan)(huan)(huan)通常固(gu)定在殼體(ti)(ti)上，動(dong)(dong)(dong)(dong)(dong)(dong)(dong)環(huan)(huan)(huan)(huan)(huan)(huan)通過彈簧(huang)、彈簧(huang)座與(yu)(yu)(yu)軸(zhou)一同旋轉。靜(jing)環(huan)(huan)(huan)(huan)(huan)(huan)與(yu)(yu)(yu)殼體(ti)(ti)、動(dong)(dong)(dong)(dong)(dong)(dong)(dong)環(huan)(huan)(huan)(huan)(huan)(huan)與(yu)(yu)(yu)軸(zhou)形成(cheng)的(de)(de)(de)間(jian)隙用成(cheng)型(xing)填料(liao)密(mi)(mi)封(feng)。在動(dong)(dong)(dong)(dong)(dong)(dong)(dong)環(huan)(huan)(huan)(huan)(huan)(huan)和(he)靜(jing)環(huan)(huan)(huan)(huan)(huan)(huan)接(jie)觸(chu)的(de)(de)(de)端面(mian)形成(cheng)相對滑動(dong)(dong)(dong)(dong)(dong)(dong)(dong)面(mian)，即動(dong)(dong)(dong)(dong)(dong)(dong)(dong)密(mi)(mi)封(feng)面(mian)。為保證密(mi)(mi)封(feng)良(liang)好(hao)，動(dong)(dong)(dong)(dong)(dong)(dong)(dong)密(mi)(mi)封(feng)面(mian)應(ying)十分平直和(he)光潔。彈簧(huang)力和(he)被密(mi)(mi)封(feng)的(de)(de)(de)流體(ti)(ti)壓力使(shi)動(dong)(dong)(dong)(dong)(dong)(dong)(dong)環(huan)(huan)(huan)(huan)(huan)(huan)貼(tie)緊靜(jing)環(huan)(huan)(huan)(huan)(huan)(huan)。因動(dong)(dong)(dong)(dong)(dong)(dong)(dong)環(huan)(huan)(huan)(huan)(huan)(huan)與(yu)(yu)(yu)軸(zhou)通過彈簧(huang)連接(jie)，動(dong)(dong)(dong)(dong)(dong)(dong)(dong)環(huan)(huan)(huan)(huan)(huan)(huan)和(he)靜(jing)環(huan)(huan)(huan)(huan)(huan)(huan)間(jian)貼(tie)合性受(shou)軸(zhou)的(de)(de)(de)振動(dong)(dong)(dong)(dong)(dong)(dong)(dong)和(he)擺動(dong)(dong)(dong)(dong)(dong)(dong)(dong)影(ying)響較小。靜(jing)環(huan)(huan)(huan)(huan)(huan)(huan)一般常用潤滑性好(hao)的(de)(de)(de)軟(ruan)質材料(liao)如石墨、填充聚四氟乙烯等(deng)，動(dong)(dong)(dong)(dong)(dong)(dong)(dong)環(huan)(huan)(huan)(huan)(huan)(huan)多用硬(ying)質合金、陶瓷(ci)等(deng)材料(liao)制造。