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。渣漿成都泵用成都機械密封的工作原理要求成都機械密封內部無任何雜質，在組裝成都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成都機械密封嚴重(zhong)漏泄。必要(yao)時(shi)可以制(zhi)作工裝在組(zu)裝前(qian)水(shui)壓試驗(yan)，檢查(cha)動靜環座是否(fou)存在影響密封(feng)的缺陷。

　　渣漿成都泵用成都機械密封由于密封面變形所引起的，而且成都機械密封面泄漏的概率是很高的。如果泵在啟動時就發生成都泵用成都機械密封泄漏，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成都機械密封的變形(xing)情況。如(ru)果發生變形(xing)，用(yong)平晶檢(jian)查(cha)密封面(mian)的干涉帶的變化(hua)情況，密封面(mian)變形(xing)存(cun)在于動(dong)環和靜環之間。

　　壓缸體動(dong)(dong)(dong)態(tai)密(mi)(mi)封(feng)(feng)(feng)(feng)(feng)系統(tong)采(cai)用(yong)的(de)(de)(de)是主密(mi)(mi)封(feng)(feng)(feng)(feng)(feng)設計(ji)，一般都用(yong)U型(xing)密(mi)(mi)封(feng)(feng)(feng)(feng)(feng)圈。液壓缸體的(de)(de)(de)往復式(shi)動(dong)(dong)(dong)態(tai)密(mi)(mi)封(feng)(feng)(feng)(feng)(feng)系統(tong)的(de)(de)(de)設計(ji)，開(kai)始使用(yong)了更加復雜(za)的(de)(de)(de)U型(xing)圈和(he)同(tong)(tong)軸密(mi)(mi)封(feng)(feng)(feng)(feng)(feng)組(zu)件的(de)(de)(de)復合(he)(he)式(shi)設計(ji)。密(mi)(mi)封(feng)(feng)(feng)(feng)(feng)的(de)(de)(de)靜(jing)(jing)(jing)環(huan)(huan)(huan)通(tong)常固定在(zai)殼(ke)體上，動(dong)(dong)(dong)環(huan)(huan)(huan)通(tong)過彈簧、彈簧座與(yu)軸一同(tong)(tong)旋轉(zhuan)。靜(jing)(jing)(jing)環(huan)(huan)(huan)與(yu)殼(ke)體、動(dong)(dong)(dong)環(huan)(huan)(huan)與(yu)軸形成(cheng)的(de)(de)(de)間隙用(yong)成(cheng)型(xing)填(tian)(tian)料密(mi)(mi)封(feng)(feng)(feng)(feng)(feng)。在(zai)動(dong)(dong)(dong)環(huan)(huan)(huan)和(he)靜(jing)(jing)(jing)環(huan)(huan)(huan)接(jie)觸(chu)的(de)(de)(de)端面形成(cheng)相對滑(hua)動(dong)(dong)(dong)面，即動(dong)(dong)(dong)密(mi)(mi)封(feng)(feng)(feng)(feng)(feng)面。為保證密(mi)(mi)封(feng)(feng)(feng)(feng)(feng)良好(hao)，動(dong)(dong)(dong)密(mi)(mi)封(feng)(feng)(feng)(feng)(feng)面應(ying)十分平直(zhi)和(he)光潔(jie)。彈簧力(li)和(he)被密(mi)(mi)封(feng)(feng)(feng)(feng)(feng)的(de)(de)(de)流體壓力(li)使動(dong)(dong)(dong)環(huan)(huan)(huan)貼緊靜(jing)(jing)(jing)環(huan)(huan)(huan)。因動(dong)(dong)(dong)環(huan)(huan)(huan)與(yu)軸通(tong)過彈簧連接(jie)，動(dong)(dong)(dong)環(huan)(huan)(huan)和(he)靜(jing)(jing)(jing)環(huan)(huan)(huan)間貼合(he)(he)性受軸的(de)(de)(de)振動(dong)(dong)(dong)和(he)擺動(dong)(dong)(dong)影響較(jiao)小。靜(jing)(jing)(jing)環(huan)(huan)(huan)一般常用(yong)潤滑(hua)性好(hao)的(de)(de)(de)軟質(zhi)材料如石(shi)墨、填(tian)(tian)充(chong)聚四氟乙烯等(deng)，動(dong)(dong)(dong)環(huan)(huan)(huan)多(duo)用(yong)硬(ying)質(zhi)合(he)(he)金、陶瓷等(deng)材料制造(zao)。