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(yi)制作(zuo)工裝在組裝前水壓試驗(yan)，檢查動靜環座是否(fou)存在影響密封的缺陷。

　　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變(bian)(bian)形情況。如果發生變(bian)(bian)形，用平晶(jing)檢(jian)查(cha)密封(feng)面的干涉帶的變(bian)(bian)化(hua)情況，密封(feng)面變(bian)(bian)形存在于動(dong)環和靜環之間。

　　壓缸體(ti)動(dong)(dong)(dong)態(tai)密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)系統采用(yong)(yong)的(de)是(shi)主密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)設(she)計(ji)(ji)(ji)，一(yi)般都用(yong)(yong)U型(xing)(xing)密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)圈。液壓缸體(ti)的(de)往復(fu)式動(dong)(dong)(dong)態(tai)密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)系統的(de)設(she)計(ji)(ji)(ji)，開始使(shi)用(yong)(yong)了更(geng)加復(fu)雜的(de)U型(xing)(xing)圈和同(tong)軸密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)組件的(de)復(fu)合(he)式設(she)計(ji)(ji)(ji)。密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)的(de)靜(jing)環(huan)(huan)通(tong)常固定(ding)在殼(ke)體(ti)上(shang)，動(dong)(dong)(dong)環(huan)(huan)通(tong)過(guo)(guo)彈(dan)(dan)(dan)簧(huang)、彈(dan)(dan)(dan)簧(huang)座(zuo)與(yu)(yu)軸一(yi)同(tong)旋轉。靜(jing)環(huan)(huan)與(yu)(yu)殼(ke)體(ti)、動(dong)(dong)(dong)環(huan)(huan)與(yu)(yu)軸形成(cheng)的(de)間隙用(yong)(yong)成(cheng)型(xing)(xing)填料(liao)密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)。在動(dong)(dong)(dong)環(huan)(huan)和靜(jing)環(huan)(huan)接(jie)觸的(de)端面形成(cheng)相對滑動(dong)(dong)(dong)面，即動(dong)(dong)(dong)密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)面。為保證密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)良好，動(dong)(dong)(dong)密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)面應十分平直和光潔。彈(dan)(dan)(dan)簧(huang)力和被(bei)密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)的(de)流(liu)體(ti)壓力使(shi)動(dong)(dong)(dong)環(huan)(huan)貼緊靜(jing)環(huan)(huan)。因(yin)動(dong)(dong)(dong)環(huan)(huan)與(yu)(yu)軸通(tong)過(guo)(guo)彈(dan)(dan)(dan)簧(huang)連接(jie)，動(dong)(dong)(dong)環(huan)(huan)和靜(jing)環(huan)(huan)間貼合(he)性(xing)受(shou)軸的(de)振動(dong)(dong)(dong)和擺動(dong)(dong)(dong)影(ying)響較小(xiao)。靜(jing)環(huan)(huan)一(yi)般常用(yong)(yong)潤滑性(xing)好的(de)軟質(zhi)(zhi)材料(liao)如石墨、填充聚四氟乙烯(xi)等(deng)，動(dong)(dong)(dong)環(huan)(huan)多用(yong)(yong)硬質(zhi)(zhi)合(he)金、陶瓷等(deng)材料(liao)制(zhi)造(zao)。