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。渣漿泵用安吉機械密封的工作原理要求安吉機械密封內部無任何雜質，在組裝安吉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安吉機械密封嚴重漏(lou)泄(xie)。必(bi)要時可以制作工裝在組裝前(qian)水壓(ya)試驗(yan)，檢查動靜環座(zuo)是否存在影響密封的(de)缺陷。

　　渣漿安吉泵用安吉機械密封由于密封面變形所引起的，而且安吉機械密封面泄漏的概率是很高的。如果泵在啟動時就發生安吉泵用安吉機械密封泄漏，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安吉機械密封的(de)變(bian)形情況。如果(guo)發生(sheng)變(bian)形，用平晶檢(jian)查密封(feng)面(mian)的(de)干(gan)涉帶(dai)的(de)變(bian)化情況，密封(feng)面(mian)變(bian)形存在(zai)于(yu)動環(huan)和靜(jing)環(huan)之間。

　　壓(ya)缸體(ti)動(dong)(dong)(dong)態密(mi)(mi)(mi)封(feng)(feng)系統采用(yong)(yong)的(de)是主密(mi)(mi)(mi)封(feng)(feng)設(she)計，一(yi)般(ban)都(dou)用(yong)(yong)U型(xing)密(mi)(mi)(mi)封(feng)(feng)圈(quan)。液壓(ya)缸體(ti)的(de)往復式動(dong)(dong)(dong)態密(mi)(mi)(mi)封(feng)(feng)系統的(de)設(she)計，開始(shi)使用(yong)(yong)了更加復雜的(de)U型(xing)圈(quan)和(he)同(tong)(tong)軸(zhou)密(mi)(mi)(mi)封(feng)(feng)組件的(de)復合式設(she)計。密(mi)(mi)(mi)封(feng)(feng)的(de)靜(jing)環(huan)(huan)(huan)(huan)(huan)通常固定在殼體(ti)上(shang)，動(dong)(dong)(dong)環(huan)(huan)(huan)(huan)(huan)通過彈(dan)簧(huang)、彈(dan)簧(huang)座與(yu)軸(zhou)一(yi)同(tong)(tong)旋(xuan)轉(zhuan)。靜(jing)環(huan)(huan)(huan)(huan)(huan)與(yu)殼體(ti)、動(dong)(dong)(dong)環(huan)(huan)(huan)(huan)(huan)與(yu)軸(zhou)形成的(de)間(jian)(jian)隙用(yong)(yong)成型(xing)填(tian)(tian)料(liao)密(mi)(mi)(mi)封(feng)(feng)。在動(dong)(dong)(dong)環(huan)(huan)(huan)(huan)(huan)和(he)靜(jing)環(huan)(huan)(huan)(huan)(huan)接觸的(de)端(duan)面(mian)(mian)(mian)形成相對滑動(dong)(dong)(dong)面(mian)(mian)(mian)，即動(dong)(dong)(dong)密(mi)(mi)(mi)封(feng)(feng)面(mian)(mian)(mian)。為保證密(mi)(mi)(mi)封(feng)(feng)良好(hao)(hao)，動(dong)(dong)(dong)密(mi)(mi)(mi)封(feng)(feng)面(mian)(mian)(mian)應十分平直和(he)光潔。彈(dan)簧(huang)力(li)和(he)被密(mi)(mi)(mi)封(feng)(feng)的(de)流體(ti)壓(ya)力(li)使動(dong)(dong)(dong)環(huan)(huan)(huan)(huan)(huan)貼(tie)緊靜(jing)環(huan)(huan)(huan)(huan)(huan)。因(yin)動(dong)(dong)(dong)環(huan)(huan)(huan)(huan)(huan)與(yu)軸(zhou)通過彈(dan)簧(huang)連接，動(dong)(dong)(dong)環(huan)(huan)(huan)(huan)(huan)和(he)靜(jing)環(huan)(huan)(huan)(huan)(huan)間(jian)(jian)貼(tie)合性受軸(zhou)的(de)振動(dong)(dong)(dong)和(he)擺動(dong)(dong)(dong)影響(xiang)較(jiao)小。靜(jing)環(huan)(huan)(huan)(huan)(huan)一(yi)般(ban)常用(yong)(yong)潤(run)滑性好(hao)(hao)的(de)軟質(zhi)材料(liao)如石墨、填(tian)(tian)充聚四氟乙烯等(deng)，動(dong)(dong)(dong)環(huan)(huan)(huan)(huan)(huan)多用(yong)(yong)硬質(zhi)合金、陶瓷等(deng)材料(liao)制造。