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。渣漿龍安泵用龍安機械密封的工作原理要求龍安機械密封內部無任何雜質，在組裝龍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龍安機械密封嚴重(zhong)漏泄。必要時(shi)可(ke)以制(zhi)作工裝在組裝前水壓試驗，檢查動靜環座是否存在影響密封的缺陷(xian)。

　　渣漿龍安泵用龍安機械密封由于密封面變形所引起的，而且龍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龍安泵用龍安機械密封泄漏，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龍安機械密封的(de)變(bian)形(xing)情況。如果發生變(bian)形(xing)，用平晶(jing)檢查密(mi)封(feng)面(mian)的(de)干涉(she)帶(dai)的(de)變(bian)化(hua)情況，密(mi)封(feng)面(mian)變(bian)形(xing)存在于動(dong)環(huan)(huan)和靜環(huan)(huan)之(zhi)間。

　　壓(ya)缸(gang)體動(dong)(dong)(dong)態密封(feng)(feng)(feng)系(xi)(xi)統(tong)采用(yong)(yong)(yong)的(de)(de)(de)是主密封(feng)(feng)(feng)設(she)計(ji)，一般都用(yong)(yong)(yong)U型(xing)密封(feng)(feng)(feng)圈(quan)。液壓(ya)缸(gang)體的(de)(de)(de)往復式(shi)動(dong)(dong)(dong)態密封(feng)(feng)(feng)系(xi)(xi)統(tong)的(de)(de)(de)設(she)計(ji)，開始使用(yong)(yong)(yong)了更加復雜的(de)(de)(de)U型(xing)圈(quan)和(he)同(tong)(tong)軸(zhou)密封(feng)(feng)(feng)組(zu)件的(de)(de)(de)復合式(shi)設(she)計(ji)。密封(feng)(feng)(feng)的(de)(de)(de)靜(jing)(jing)環(huan)(huan)通(tong)常固定在殼體上(shang)，動(dong)(dong)(dong)環(huan)(huan)通(tong)過彈(dan)簧(huang)、彈(dan)簧(huang)座與(yu)軸(zhou)一同(tong)(tong)旋轉。靜(jing)(jing)環(huan)(huan)與(yu)殼體、動(dong)(dong)(dong)環(huan)(huan)與(yu)軸(zhou)形(xing)成的(de)(de)(de)間隙用(yong)(yong)(yong)成型(xing)填(tian)料密封(feng)(feng)(feng)。在動(dong)(dong)(dong)環(huan)(huan)和(he)靜(jing)(jing)環(huan)(huan)接觸(chu)的(de)(de)(de)端面形(xing)成相(xiang)對滑(hua)動(dong)(dong)(dong)面，即(ji)動(dong)(dong)(dong)密封(feng)(feng)(feng)面。為(wei)保證(zheng)密封(feng)(feng)(feng)良好，動(dong)(dong)(dong)密封(feng)(feng)(feng)面應(ying)十分(fen)平直和(he)光潔。彈(dan)簧(huang)力(li)和(he)被密封(feng)(feng)(feng)的(de)(de)(de)流體壓(ya)力(li)使動(dong)(dong)(dong)環(huan)(huan)貼(tie)緊靜(jing)(jing)環(huan)(huan)。因(yin)動(dong)(dong)(dong)環(huan)(huan)與(yu)軸(zhou)通(tong)過彈(dan)簧(huang)連接，動(dong)(dong)(dong)環(huan)(huan)和(he)靜(jing)(jing)環(huan)(huan)間貼(tie)合性受(shou)軸(zhou)的(de)(de)(de)振動(dong)(dong)(dong)和(he)擺動(dong)(dong)(dong)影響較(jiao)小。靜(jing)(jing)環(huan)(huan)一般常用(yong)(yong)(yong)潤(run)滑(hua)性好的(de)(de)(de)軟質材料如石(shi)墨、填(tian)充聚(ju)四氟乙烯等，動(dong)(dong)(dong)環(huan)(huan)多(duo)用(yong)(yong)(yong)硬質合金、陶瓷等材料制造。