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。渣漿湟中泵用湟中機械密封的工作原理要求湟中機械密封內部無任何雜質，在組裝湟中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湟中機械密封嚴重漏泄。必要時可以(yi)制作工裝(zhuang)在組裝(zhuang)前水壓(ya)試驗，檢查動靜環座是(shi)否存在影響(xiang)密封的缺陷。

　　渣漿湟中泵用湟中機械密封由于密封面變形所引起的，而且湟中機械密封面泄漏的概率是很高的。如果泵在啟動時就發生湟中泵用湟中機械密封泄漏，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湟中機械密封的(de)變(bian)(bian)形情(qing)況。如果發生變(bian)(bian)形，用平晶檢查密封面(mian)的(de)干涉帶的(de)變(bian)(bian)化情(qing)況，密封面(mian)變(bian)(bian)形存在于動環(huan)和(he)靜(jing)環(huan)之間。

　　壓缸體(ti)動(dong)(dong)(dong)(dong)態(tai)密(mi)(mi)封(feng)(feng)系統(tong)采用(yong)的(de)(de)是(shi)主密(mi)(mi)封(feng)(feng)設計(ji)，一般都用(yong)U型密(mi)(mi)封(feng)(feng)圈(quan)(quan)。液壓缸體(ti)的(de)(de)往復式(shi)動(dong)(dong)(dong)(dong)態(tai)密(mi)(mi)封(feng)(feng)系統(tong)的(de)(de)設計(ji)，開始使(shi)用(yong)了更加(jia)復雜的(de)(de)U型圈(quan)(quan)和(he)(he)同軸(zhou)密(mi)(mi)封(feng)(feng)組件的(de)(de)復合式(shi)設計(ji)。密(mi)(mi)封(feng)(feng)的(de)(de)靜(jing)(jing)環(huan)(huan)(huan)(huan)通常固定在殼(ke)體(ti)上(shang)，動(dong)(dong)(dong)(dong)環(huan)(huan)(huan)(huan)通過彈簧(huang)(huang)、彈簧(huang)(huang)座(zuo)與(yu)(yu)軸(zhou)一同旋(xuan)轉。靜(jing)(jing)環(huan)(huan)(huan)(huan)與(yu)(yu)殼(ke)體(ti)、動(dong)(dong)(dong)(dong)環(huan)(huan)(huan)(huan)與(yu)(yu)軸(zhou)形成(cheng)的(de)(de)間隙用(yong)成(cheng)型填(tian)料(liao)(liao)密(mi)(mi)封(feng)(feng)。在動(dong)(dong)(dong)(dong)環(huan)(huan)(huan)(huan)和(he)(he)靜(jing)(jing)環(huan)(huan)(huan)(huan)接觸的(de)(de)端面形成(cheng)相對滑動(dong)(dong)(dong)(dong)面，即(ji)動(dong)(dong)(dong)(dong)密(mi)(mi)封(feng)(feng)面。為保證密(mi)(mi)封(feng)(feng)良好(hao)，動(dong)(dong)(dong)(dong)密(mi)(mi)封(feng)(feng)面應十分平直和(he)(he)光(guang)潔(jie)。彈簧(huang)(huang)力和(he)(he)被密(mi)(mi)封(feng)(feng)的(de)(de)流(liu)體(ti)壓力使(shi)動(dong)(dong)(dong)(dong)環(huan)(huan)(huan)(huan)貼(tie)緊靜(jing)(jing)環(huan)(huan)(huan)(huan)。因動(dong)(dong)(dong)(dong)環(huan)(huan)(huan)(huan)與(yu)(yu)軸(zhou)通過彈簧(huang)(huang)連(lian)接，動(dong)(dong)(dong)(dong)環(huan)(huan)(huan)(huan)和(he)(he)靜(jing)(jing)環(huan)(huan)(huan)(huan)間貼(tie)合性受軸(zhou)的(de)(de)振動(dong)(dong)(dong)(dong)和(he)(he)擺動(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(hao)的(de)(de)軟質材料(liao)(liao)如石墨、填(tian)充聚(ju)四氟(fu)乙烯等，動(dong)(dong)(dong)(dong)環(huan)(huan)(huan)(huan)多用(yong)硬質合金、陶瓷等材料(liao)(liao)制造。