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。渣漿興山泵用興山機械密封的工作原理要求興山機械密封內部無任何雜質，在組裝興山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興山機械密封嚴重漏泄。必要(yao)時可以制作工裝在(zai)組裝前水(shui)壓試驗，檢(jian)查動(dong)靜環(huan)座(zuo)是(shi)否存在(zai)影響密封(feng)的(de)缺陷。

　　渣漿興山泵用興山機械密封由于密封面變形所引起的，而且興山機械密封面泄漏的概率是很高的。如果泵在啟動時就發生興山泵用興山機械密封泄漏，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興山機械密封的(de)變形情(qing)況。如果(guo)發生(sheng)變形，用平晶檢(jian)查密封面的(de)干涉帶的(de)變化情(qing)況，密封面變形存在于動環和靜(jing)環之間。

　　壓(ya)缸體(ti)動(dong)(dong)(dong)(dong)態(tai)密(mi)(mi)封(feng)(feng)(feng)(feng)系統采用(yong)(yong)的(de)是(shi)主密(mi)(mi)封(feng)(feng)(feng)(feng)設(she)計(ji)，一(yi)般(ban)都用(yong)(yong)U型密(mi)(mi)封(feng)(feng)(feng)(feng)圈。液壓(ya)缸體(ti)的(de)往復式動(dong)(dong)(dong)(dong)態(tai)密(mi)(mi)封(feng)(feng)(feng)(feng)系統的(de)設(she)計(ji)，開(kai)始使用(yong)(yong)了更(geng)加(jia)復雜的(de)U型圈和(he)同(tong)軸(zhou)(zhou)密(mi)(mi)封(feng)(feng)(feng)(feng)組件(jian)的(de)復合式設(she)計(ji)。密(mi)(mi)封(feng)(feng)(feng)(feng)的(de)靜(jing)(jing)(jing)環(huan)(huan)通常固定在(zai)殼體(ti)上，動(dong)(dong)(dong)(dong)環(huan)(huan)通過彈(dan)簧(huang)、彈(dan)簧(huang)座與軸(zhou)(zhou)一(yi)同(tong)旋轉。靜(jing)(jing)(jing)環(huan)(huan)與殼體(ti)、動(dong)(dong)(dong)(dong)環(huan)(huan)與軸(zhou)(zhou)形成(cheng)(cheng)的(de)間隙用(yong)(yong)成(cheng)(cheng)型填料密(mi)(mi)封(feng)(feng)(feng)(feng)。在(zai)動(dong)(dong)(dong)(dong)環(huan)(huan)和(he)靜(jing)(jing)(jing)環(huan)(huan)接觸的(de)端面形成(cheng)(cheng)相對滑動(dong)(dong)(dong)(dong)面，即動(dong)(dong)(dong)(dong)密(mi)(mi)封(feng)(feng)(feng)(feng)面。為(wei)保證密(mi)(mi)封(feng)(feng)(feng)(feng)良好(hao)(hao)，動(dong)(dong)(dong)(dong)密(mi)(mi)封(feng)(feng)(feng)(feng)面應十(shi)分平(ping)直和(he)光潔。彈(dan)簧(huang)力(li)和(he)被密(mi)(mi)封(feng)(feng)(feng)(feng)的(de)流體(ti)壓(ya)力(li)使動(dong)(dong)(dong)(dong)環(huan)(huan)貼緊靜(jing)(jing)(jing)環(huan)(huan)。因動(dong)(dong)(dong)(dong)環(huan)(huan)與軸(zhou)(zhou)通過彈(dan)簧(huang)連接，動(dong)(dong)(dong)(dong)環(huan)(huan)和(he)靜(jing)(jing)(jing)環(huan)(huan)間貼合性(xing)受軸(zhou)(zhou)的(de)振動(dong)(dong)(dong)(dong)和(he)擺動(dong)(dong)(dong)(dong)影響較小(xiao)。靜(jing)(jing)(jing)環(huan)(huan)一(yi)般(ban)常用(yong)(yong)潤滑性(xing)好(hao)(hao)的(de)軟質材(cai)料如石墨、填充聚四氟乙烯等，動(dong)(dong)(dong)(dong)環(huan)(huan)多用(yong)(yong)硬質合金、陶(tao)瓷(ci)等材(cai)料制造。