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。渣漿泵用博樂機械密封的工作原理要求博樂機械密封內部無任何雜質，在組裝博樂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博樂機械密封嚴(yan)重(zhong)漏(lou)泄。必要時(shi)可以制(zhi)作工裝(zhuang)在(zai)組裝(zhuang)前(qian)水壓試驗，檢(jian)查動靜環座是否存(cun)在(zai)影響密(mi)封的(de)缺陷。

　　渣漿博樂泵用博樂機械密封由于密封面變形所引起的，而且博樂機械密封面泄漏的概率是很高的。如果泵在啟動時就發生博樂泵用博樂機械密封泄漏，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博樂機械密封的變形(xing)情(qing)況(kuang)。如果發生(sheng)變形(xing)，用平(ping)晶檢查密封(feng)面的干涉帶的變化(hua)情(qing)況(kuang)，密封(feng)面變形(xing)存在于動環和靜(jing)環之(zhi)間。

　　壓缸(gang)體(ti)(ti)(ti)動(dong)(dong)(dong)態密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)系(xi)統采用(yong)的(de)是(shi)主密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)設(she)計(ji)，一般都用(yong)U型密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)圈。液壓缸(gang)體(ti)(ti)(ti)的(de)往(wang)復(fu)式(shi)(shi)動(dong)(dong)(dong)態密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)系(xi)統的(de)設(she)計(ji)，開(kai)始使用(yong)了更加復(fu)雜的(de)U型圈和同軸密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)組(zu)件的(de)復(fu)合(he)(he)式(shi)(shi)設(she)計(ji)。密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)的(de)靜環(huan)(huan)(huan)(huan)通常(chang)(chang)固定在(zai)殼體(ti)(ti)(ti)上，動(dong)(dong)(dong)環(huan)(huan)(huan)(huan)通過彈(dan)簧(huang)(huang)、彈(dan)簧(huang)(huang)座與(yu)軸一同旋轉(zhuan)。靜環(huan)(huan)(huan)(huan)與(yu)殼體(ti)(ti)(ti)、動(dong)(dong)(dong)環(huan)(huan)(huan)(huan)與(yu)軸形成(cheng)的(de)間隙用(yong)成(cheng)型填(tian)料(liao)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)。在(zai)動(dong)(dong)(dong)環(huan)(huan)(huan)(huan)和靜環(huan)(huan)(huan)(huan)接觸的(de)端面形成(cheng)相對滑動(dong)(dong)(dong)面，即(ji)動(dong)(dong)(dong)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)面。為保證密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)良好，動(dong)(dong)(dong)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)面應(ying)十分平直和光潔。彈(dan)簧(huang)(huang)力和被(bei)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)的(de)流體(ti)(ti)(ti)壓力使動(dong)(dong)(dong)環(huan)(huan)(huan)(huan)貼緊靜環(huan)(huan)(huan)(huan)。因動(dong)(dong)(dong)環(huan)(huan)(huan)(huan)與(yu)軸通過彈(dan)簧(huang)(huang)連接，動(dong)(dong)(dong)環(huan)(huan)(huan)(huan)和靜環(huan)(huan)(huan)(huan)間貼合(he)(he)性受軸的(de)振動(dong)(dong)(dong)和擺動(dong)(dong)(dong)影響較小。靜環(huan)(huan)(huan)(huan)一般常(chang)(chang)用(yong)潤滑性好的(de)軟質材料(liao)如石(shi)墨、填(tian)充聚四(si)氟乙烯等，動(dong)(dong)(dong)環(huan)(huan)(huan)(huan)多用(yong)硬質合(he)(he)金(jin)、陶瓷等材料(liao)制造。