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。渣漿泵用廣河機械密封的工作原理要求廣河機械密封內部無任何雜質，在組裝廣河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廣河機械密封嚴重漏泄。必要(yao)時可(ke)以制作工裝(zhuang)(zhuang)在組裝(zhuang)(zhuang)前(qian)水(shui)壓試驗，檢(jian)查動靜環座是否存在影響密(mi)封(feng)的缺陷(xian)。

　　渣漿廣河泵用廣河機械密封由于密封面變形所引起的，而且廣河機械密封面泄漏的概率是很高的。如果泵在啟動時就發生廣河泵用廣河機械密封泄漏，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廣河機械密封的變(bian)(bian)(bian)形情(qing)況。如果發(fa)生變(bian)(bian)(bian)形，用平晶檢查密(mi)封面的干涉帶(dai)的變(bian)(bian)(bian)化(hua)情(qing)況，密(mi)封面變(bian)(bian)(bian)形存在于動環(huan)和(he)靜環(huan)之間(jian)。

　　壓(ya)(ya)缸體(ti)動(dong)(dong)(dong)態密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)系統(tong)采用(yong)的(de)(de)是主(zhu)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)設(she)計(ji)，一(yi)般(ban)都(dou)用(yong)U型(xing)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)圈(quan)。液壓(ya)(ya)缸體(ti)的(de)(de)往(wang)復式動(dong)(dong)(dong)態密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)系統(tong)的(de)(de)設(she)計(ji)，開始使用(yong)了更加復雜的(de)(de)U型(xing)圈(quan)和(he)(he)同(tong)軸(zhou)(zhou)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)組件的(de)(de)復合(he)式設(she)計(ji)。密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)的(de)(de)靜環(huan)(huan)(huan)通(tong)(tong)常(chang)固定在殼體(ti)上，動(dong)(dong)(dong)環(huan)(huan)(huan)通(tong)(tong)過彈(dan)簧(huang)、彈(dan)簧(huang)座與(yu)(yu)軸(zhou)(zhou)一(yi)同(tong)旋轉。靜環(huan)(huan)(huan)與(yu)(yu)殼體(ti)、動(dong)(dong)(dong)環(huan)(huan)(huan)與(yu)(yu)軸(zhou)(zhou)形(xing)成(cheng)(cheng)的(de)(de)間(jian)隙(xi)用(yong)成(cheng)(cheng)型(xing)填料密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)。在動(dong)(dong)(dong)環(huan)(huan)(huan)和(he)(he)靜環(huan)(huan)(huan)接觸的(de)(de)端(duan)面(mian)形(xing)成(cheng)(cheng)相對(dui)滑動(dong)(dong)(dong)面(mian)，即動(dong)(dong)(dong)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)面(mian)。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(mian)應十分(fen)平直和(he)(he)光潔(jie)。彈(dan)簧(huang)力(li)(li)和(he)(he)被(bei)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)的(de)(de)流體(ti)壓(ya)(ya)力(li)(li)使動(dong)(dong)(dong)環(huan)(huan)(huan)貼緊靜環(huan)(huan)(huan)。因動(dong)(dong)(dong)環(huan)(huan)(huan)與(yu)(yu)軸(zhou)(zhou)通(tong)(tong)過彈(dan)簧(huang)連接，動(dong)(dong)(dong)環(huan)(huan)(huan)和(he)(he)靜環(huan)(huan)(huan)間(jian)貼合(he)性(xing)受軸(zhou)(zhou)的(de)(de)振動(dong)(dong)(dong)和(he)(he)擺動(dong)(dong)(dong)影響較(jiao)小。靜環(huan)(huan)(huan)一(yi)般(ban)常(chang)用(yong)潤滑性(xing)好的(de)(de)軟質(zhi)材料如(ru)石墨、填充聚四氟乙(yi)烯等，動(dong)(dong)(dong)環(huan)(huan)(huan)多(duo)用(yong)硬質(zhi)合(he)金、陶瓷等材料制造。