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。渣漿吉首泵用吉首機械密封的工作原理要求吉首機械密封內部無任何雜質，在組裝吉首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吉首機械密封嚴重漏泄。必要時可以制(zhi)作工(gong)裝在(zai)組(zu)裝前水壓(ya)試(shi)驗，檢查動靜環座是(shi)否存在(zai)影響密(mi)封的缺陷(xian)。

　　渣漿吉首泵用吉首機械密封由于密封面變形所引起的，而且吉首機械密封面泄漏的概率是很高的。如果泵在啟動時就發生吉首泵用吉首機械密封泄漏，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吉首機械密封的(de)變形(xing)情(qing)(qing)況(kuang)。如果發生變形(xing)，用平晶檢查密封(feng)面(mian)的(de)干涉(she)帶的(de)變化情(qing)(qing)況(kuang)，密封(feng)面(mian)變形(xing)存在于動環和靜環之(zhi)間。

　　壓(ya)缸體(ti)(ti)動(dong)(dong)(dong)(dong)(dong)態密(mi)(mi)(mi)封(feng)(feng)(feng)系統采用(yong)(yong)(yong)(yong)的是主密(mi)(mi)(mi)封(feng)(feng)(feng)設(she)(she)計，一(yi)般都(dou)用(yong)(yong)(yong)(yong)U型密(mi)(mi)(mi)封(feng)(feng)(feng)圈。液(ye)壓(ya)缸體(ti)(ti)的往(wang)復式動(dong)(dong)(dong)(dong)(dong)態密(mi)(mi)(mi)封(feng)(feng)(feng)系統的設(she)(she)計，開始使(shi)用(yong)(yong)(yong)(yong)了更加復雜的U型圈和(he)(he)同(tong)軸密(mi)(mi)(mi)封(feng)(feng)(feng)組件的復合式設(she)(she)計。密(mi)(mi)(mi)封(feng)(feng)(feng)的靜(jing)環通常固定在殼體(ti)(ti)上(shang)，動(dong)(dong)(dong)(dong)(dong)環通過彈(dan)簧(huang)(huang)、彈(dan)簧(huang)(huang)座與(yu)軸一(yi)同(tong)旋轉。靜(jing)環與(yu)殼體(ti)(ti)、動(dong)(dong)(dong)(dong)(dong)環與(yu)軸形成的間隙用(yong)(yong)(yong)(yong)成型填料密(mi)(mi)(mi)封(feng)(feng)(feng)。在動(dong)(dong)(dong)(dong)(dong)環和(he)(he)靜(jing)環接觸的端面(mian)形成相對滑(hua)動(dong)(dong)(dong)(dong)(dong)面(mian)，即動(dong)(dong)(dong)(dong)(dong)密(mi)(mi)(mi)封(feng)(feng)(feng)面(mian)。為(wei)保證(zheng)密(mi)(mi)(mi)封(feng)(feng)(feng)良好(hao)，動(dong)(dong)(dong)(dong)(dong)密(mi)(mi)(mi)封(feng)(feng)(feng)面(mian)應十分平直和(he)(he)光潔(jie)。彈(dan)簧(huang)(huang)力和(he)(he)被密(mi)(mi)(mi)封(feng)(feng)(feng)的流體(ti)(ti)壓(ya)力使(shi)動(dong)(dong)(dong)(dong)(dong)環貼(tie)緊靜(jing)環。因(yin)動(dong)(dong)(dong)(dong)(dong)環與(yu)軸通過彈(dan)簧(huang)(huang)連(lian)接，動(dong)(dong)(dong)(dong)(dong)環和(he)(he)靜(jing)環間貼(tie)合性(xing)受軸的振動(dong)(dong)(dong)(dong)(dong)和(he)(he)擺(bai)動(dong)(dong)(dong)(dong)(dong)影(ying)響較小(xiao)。靜(jing)環一(yi)般常用(yong)(yong)(yong)(yong)潤滑(hua)性(xing)好(hao)的軟質(zhi)材(cai)料如石墨、填充聚四氟(fu)乙烯等(deng)(deng)，動(dong)(dong)(dong)(dong)(dong)環多(duo)用(yong)(yong)(yong)(yong)硬質(zhi)合金(jin)、陶(tao)瓷等(deng)(deng)材(cai)料制(zhi)造(zao)。