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。渣漿泵用鄱陽機械密封的工作原理要求鄱陽機械密封內部無任何雜質，在組裝鄱陽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鄱陽機械密封嚴重漏泄。必要時可以制作工(gong)裝(zhuang)在(zai)組裝(zhuang)前水壓試驗，檢查動靜環座是否存在(zai)影(ying)響密封(feng)的缺陷。

　　渣漿鄱陽泵用鄱陽機械密封由于密封面變形所引起的，而且鄱陽機械密封面泄漏的概率是很高的。如果泵在啟動時就發生鄱陽泵用鄱陽機械密封泄漏，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鄱陽機械密封的變(bian)形情況。如果(guo)發(fa)生變(bian)形，用平晶檢查(cha)密(mi)封面的干(gan)涉帶(dai)的變(bian)化情況，密(mi)封面變(bian)形存在于動環和靜(jing)環之間(jian)。

　　壓(ya)(ya)(ya)缸體(ti)(ti)動(dong)(dong)(dong)態密(mi)(mi)封(feng)(feng)(feng)(feng)系(xi)統(tong)采用(yong)(yong)的(de)(de)(de)(de)是主密(mi)(mi)封(feng)(feng)(feng)(feng)設(she)(she)計，一般都用(yong)(yong)U型(xing)密(mi)(mi)封(feng)(feng)(feng)(feng)圈(quan)(quan)。液壓(ya)(ya)(ya)缸體(ti)(ti)的(de)(de)(de)(de)往復式(shi)動(dong)(dong)(dong)態密(mi)(mi)封(feng)(feng)(feng)(feng)系(xi)統(tong)的(de)(de)(de)(de)設(she)(she)計，開始使用(yong)(yong)了更加復雜(za)的(de)(de)(de)(de)U型(xing)圈(quan)(quan)和(he)(he)同(tong)軸(zhou)密(mi)(mi)封(feng)(feng)(feng)(feng)組件(jian)的(de)(de)(de)(de)復合式(shi)設(she)(she)計。密(mi)(mi)封(feng)(feng)(feng)(feng)的(de)(de)(de)(de)靜(jing)環(huan)(huan)(huan)通常固定(ding)在殼(ke)體(ti)(ti)上，動(dong)(dong)(dong)環(huan)(huan)(huan)通過(guo)彈(dan)簧(huang)(huang)、彈(dan)簧(huang)(huang)座(zuo)與(yu)軸(zhou)一同(tong)旋(xuan)轉。靜(jing)環(huan)(huan)(huan)與(yu)殼(ke)體(ti)(ti)、動(dong)(dong)(dong)環(huan)(huan)(huan)與(yu)軸(zhou)形成(cheng)的(de)(de)(de)(de)間(jian)(jian)隙用(yong)(yong)成(cheng)型(xing)填(tian)料(liao)密(mi)(mi)封(feng)(feng)(feng)(feng)。在動(dong)(dong)(dong)環(huan)(huan)(huan)和(he)(he)靜(jing)環(huan)(huan)(huan)接(jie)觸的(de)(de)(de)(de)端面(mian)(mian)形成(cheng)相對滑動(dong)(dong)(dong)面(mian)(mian)，即動(dong)(dong)(dong)密(mi)(mi)封(feng)(feng)(feng)(feng)面(mian)(mian)。為保證密(mi)(mi)封(feng)(feng)(feng)(feng)良好(hao)，動(dong)(dong)(dong)密(mi)(mi)封(feng)(feng)(feng)(feng)面(mian)(mian)應十分平直和(he)(he)光潔。彈(dan)簧(huang)(huang)力和(he)(he)被(bei)密(mi)(mi)封(feng)(feng)(feng)(feng)的(de)(de)(de)(de)流體(ti)(ti)壓(ya)(ya)(ya)力使動(dong)(dong)(dong)環(huan)(huan)(huan)貼緊靜(jing)環(huan)(huan)(huan)。因動(dong)(dong)(dong)環(huan)(huan)(huan)與(yu)軸(zhou)通過(guo)彈(dan)簧(huang)(huang)連接(jie)，動(dong)(dong)(dong)環(huan)(huan)(huan)和(he)(he)靜(jing)環(huan)(huan)(huan)間(jian)(jian)貼合性受軸(zhou)的(de)(de)(de)(de)振動(dong)(dong)(dong)和(he)(he)擺動(dong)(dong)(dong)影響較小。靜(jing)環(huan)(huan)(huan)一般常用(yong)(yong)潤滑性好(hao)的(de)(de)(de)(de)軟質材料(liao)如石墨、填(tian)充聚四氟乙(yi)烯等，動(dong)(dong)(dong)環(huan)(huan)(huan)多用(yong)(yong)硬質合金、陶瓷等材料(liao)制造。