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。渣漿泵用桑珠孜機械密封的工作原理要求桑珠孜機械密封內部無任何雜質，在組裝桑珠孜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桑珠孜機械密封嚴重(zhong)漏泄。必要時(shi)可以制作工(gong)裝在組(zu)裝前水壓試(shi)驗(yan)，檢(jian)查動(dong)靜環座是否存在影響(xiang)密(mi)封的缺陷。

　　渣漿桑珠孜泵用桑珠孜機械密封由于密封面變形所引起的，而且桑珠孜機械密封面泄漏的概率是很高的。如果泵在啟動時就發生桑珠孜泵用桑珠孜機械密封泄漏，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桑珠孜機械密封的變(bian)(bian)形情況(kuang)。如果發生變(bian)(bian)形，用平晶檢(jian)查密(mi)封面的干涉帶的變(bian)(bian)化情況(kuang)，密(mi)封面變(bian)(bian)形存在于(yu)動(dong)環(huan)和靜環(huan)之間。

　　壓(ya)缸體動(dong)(dong)態密(mi)(mi)封(feng)(feng)系統采用(yong)的是主密(mi)(mi)封(feng)(feng)設(she)計(ji)，一(yi)般(ban)(ban)都用(yong)U型(xing)密(mi)(mi)封(feng)(feng)圈。液壓(ya)缸體的往復式(shi)動(dong)(dong)態密(mi)(mi)封(feng)(feng)系統的設(she)計(ji)，開始使(shi)用(yong)了更加復雜的U型(xing)圈和同軸(zhou)(zhou)密(mi)(mi)封(feng)(feng)組件的復合式(shi)設(she)計(ji)。密(mi)(mi)封(feng)(feng)的靜環(huan)(huan)(huan)(huan)(huan)通常固定在殼體上(shang)，動(dong)(dong)環(huan)(huan)(huan)(huan)(huan)通過彈(dan)(dan)簧(huang)(huang)、彈(dan)(dan)簧(huang)(huang)座與(yu)軸(zhou)(zhou)一(yi)同旋轉。靜環(huan)(huan)(huan)(huan)(huan)與(yu)殼體、動(dong)(dong)環(huan)(huan)(huan)(huan)(huan)與(yu)軸(zhou)(zhou)形成的間(jian)隙用(yong)成型(xing)填(tian)料密(mi)(mi)封(feng)(feng)。在動(dong)(dong)環(huan)(huan)(huan)(huan)(huan)和靜環(huan)(huan)(huan)(huan)(huan)接觸的端面(mian)(mian)形成相對滑(hua)動(dong)(dong)面(mian)(mian)，即動(dong)(dong)密(mi)(mi)封(feng)(feng)面(mian)(mian)。為保證密(mi)(mi)封(feng)(feng)良好，動(dong)(dong)密(mi)(mi)封(feng)(feng)面(mian)(mian)應十分平直和光潔(jie)。彈(dan)(dan)簧(huang)(huang)力和被密(mi)(mi)封(feng)(feng)的流(liu)體壓(ya)力使(shi)動(dong)(dong)環(huan)(huan)(huan)(huan)(huan)貼(tie)(tie)緊靜環(huan)(huan)(huan)(huan)(huan)。因動(dong)(dong)環(huan)(huan)(huan)(huan)(huan)與(yu)軸(zhou)(zhou)通過彈(dan)(dan)簧(huang)(huang)連接，動(dong)(dong)環(huan)(huan)(huan)(huan)(huan)和靜環(huan)(huan)(huan)(huan)(huan)間(jian)貼(tie)(tie)合性受軸(zhou)(zhou)的振(zhen)動(dong)(dong)和擺動(dong)(dong)影響(xiang)較小。靜環(huan)(huan)(huan)(huan)(huan)一(yi)般(ban)(ban)常用(yong)潤滑(hua)性好的軟質(zhi)材料如石墨、填(tian)充聚四(si)氟乙烯等，動(dong)(dong)環(huan)(huan)(huan)(huan)(huan)多(duo)用(yong)硬質(zhi)合金、陶(tao)瓷(ci)等材料制造。