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。渣漿陵水泵用陵水機械密封的工作原理要求陵水機械密封內部無任何雜質，在組裝陵水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陵水機械密封嚴(yan)重漏泄(xie)。必(bi)要時可以(yi)制作工裝(zhuang)在組裝(zhuang)前水壓試驗，檢(jian)查動靜環座是否存在影響密(mi)封的缺陷。

　　渣漿陵水泵用陵水機械密封由于密封面變形所引起的，而且陵水機械密封面泄漏的概率是很高的。如果泵在啟動時就發生陵水泵用陵水機械密封泄漏，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陵水機械密封的變(bian)形(xing)(xing)情況。如果(guo)發(fa)生變(bian)形(xing)(xing)，用平晶檢(jian)查密封面的干(gan)涉帶的變(bian)化(hua)情況，密封面變(bian)形(xing)(xing)存在于動(dong)環和靜環之間。

　　壓(ya)缸體(ti)(ti)動(dong)(dong)(dong)(dong)(dong)態密(mi)封(feng)(feng)系統(tong)(tong)采用(yong)的(de)(de)(de)(de)是主密(mi)封(feng)(feng)設(she)(she)(she)計，一般都用(yong)U型密(mi)封(feng)(feng)圈。液壓(ya)缸體(ti)(ti)的(de)(de)(de)(de)往(wang)復式動(dong)(dong)(dong)(dong)(dong)態密(mi)封(feng)(feng)系統(tong)(tong)的(de)(de)(de)(de)設(she)(she)(she)計，開始使(shi)用(yong)了更加復雜的(de)(de)(de)(de)U型圈和(he)(he)同軸密(mi)封(feng)(feng)組件的(de)(de)(de)(de)復合式設(she)(she)(she)計。密(mi)封(feng)(feng)的(de)(de)(de)(de)靜(jing)(jing)環(huan)(huan)(huan)(huan)通(tong)常固(gu)定在殼體(ti)(ti)上，動(dong)(dong)(dong)(dong)(dong)環(huan)(huan)(huan)(huan)通(tong)過彈(dan)簧(huang)、彈(dan)簧(huang)座(zuo)與(yu)軸一同旋轉(zhuan)。靜(jing)(jing)環(huan)(huan)(huan)(huan)與(yu)殼體(ti)(ti)、動(dong)(dong)(dong)(dong)(dong)環(huan)(huan)(huan)(huan)與(yu)軸形成(cheng)的(de)(de)(de)(de)間隙用(yong)成(cheng)型填料(liao)密(mi)封(feng)(feng)。在動(dong)(dong)(dong)(dong)(dong)環(huan)(huan)(huan)(huan)和(he)(he)靜(jing)(jing)環(huan)(huan)(huan)(huan)接觸(chu)的(de)(de)(de)(de)端(duan)面(mian)形成(cheng)相(xiang)對滑動(dong)(dong)(dong)(dong)(dong)面(mian)，即動(dong)(dong)(dong)(dong)(dong)密(mi)封(feng)(feng)面(mian)。為保證(zheng)密(mi)封(feng)(feng)良(liang)好，動(dong)(dong)(dong)(dong)(dong)密(mi)封(feng)(feng)面(mian)應(ying)十分平直和(he)(he)光潔(jie)。彈(dan)簧(huang)力(li)和(he)(he)被密(mi)封(feng)(feng)的(de)(de)(de)(de)流(liu)體(ti)(ti)壓(ya)力(li)使(shi)動(dong)(dong)(dong)(dong)(dong)環(huan)(huan)(huan)(huan)貼緊靜(jing)(jing)環(huan)(huan)(huan)(huan)。因動(dong)(dong)(dong)(dong)(dong)環(huan)(huan)(huan)(huan)與(yu)軸通(tong)過彈(dan)簧(huang)連接，動(dong)(dong)(dong)(dong)(dong)環(huan)(huan)(huan)(huan)和(he)(he)靜(jing)(jing)環(huan)(huan)(huan)(huan)間貼合性受軸的(de)(de)(de)(de)振動(dong)(dong)(dong)(dong)(dong)和(he)(he)擺動(dong)(dong)(dong)(dong)(dong)影響較小。靜(jing)(jing)環(huan)(huan)(huan)(huan)一般常用(yong)潤滑性好的(de)(de)(de)(de)軟質材料(liao)如石墨、填充(chong)聚四氟乙烯等，動(dong)(dong)(dong)(dong)(dong)環(huan)(huan)(huan)(huan)多用(yong)硬質合金、陶瓷等材料(liao)制造(zao)。