東臺機械密封又叫端面密封，在有關標準中是這樣定義的：由至少一對垂直于旋轉軸線的端面在流體壓力和補償機構彈力的作用以及輔助密封的配合下保持貼合并相對滑動而構成的防止流體泄漏的裝置。帶有平衡罐的自身壓力增壓系統是一種壓力傳遞機構，用于雙端面東臺機械密封，以解決現有的循環(huan)水泵的部(bu)分(fen)揚程不能克服系統的阻力，在循環(huan)泵流量不變的情況下，一旦循環(huan)泵的揚程提(ti)(ti)高，則循環(huan)泵所配電機功(gong)率將大幅提(ti)(ti)高，設備(bei)運行電費(fei)也(ye)隨之(zhi)增(zeng)加的問題。

　　自身(shen)壓(ya)(ya)力增(zeng)(zeng)壓(ya)(ya)系統(tong)結構(gou)包括出水(shui)(shui)口(kou)、固(gu)(gu)(gu)定(ding)(ding)(ding)(ding)(ding)法蘭(lan)、泵(beng)體(ti)、增(zeng)(zeng)壓(ya)(ya)裝置(zhi)、電(dian)機轉子、吊環、防護(hu)罩(zhao)、水(shui)(shui)泵(beng)、固(gu)(gu)(gu)定(ding)(ding)(ding)(ding)(ding)基(ji)(ji)座(zuo)(zuo)(zuo)、底座(zuo)(zuo)(zuo)、加固(gu)(gu)(gu)件、控制(zhi)閥、緊固(gu)(gu)(gu)件，所述出水(shui)(shui)口(kou)與(yu)(yu)固(gu)(gu)(gu)定(ding)(ding)(ding)(ding)(ding)法蘭(lan)相(xiang)連(lian)(lian)(lian)(lian)接(jie)(jie)(jie)，泵(beng)體(ti)與(yu)(yu)增(zeng)(zeng)壓(ya)(ya)裝置(zhi)相(xiang)連(lian)(lian)(lian)(lian)接(jie)(jie)(jie)，增(zeng)(zeng)壓(ya)(ya)裝置(zhi)由(you)進(jin)水(shui)(shui)口(kou)、水(shui)(shui)管、負壓(ya)(ya)室、平(ping)(ping)衡固(gu)(gu)(gu)定(ding)(ding)(ding)(ding)(ding)盤、緊固(gu)(gu)(gu)支架(jia)組成，進(jin)水(shui)(shui)口(kou)與(yu)(yu)水(shui)(shui)管相(xiang)連(lian)(lian)(lian)(lian)接(jie)(jie)(jie)，水(shui)(shui)管與(yu)(yu)負壓(ya)(ya)室相(xiang)連(lian)(lian)(lian)(lian)接(jie)(jie)(jie)，負壓(ya)(ya)室通(tong)過平(ping)(ping)衡固(gu)(gu)(gu)定(ding)(ding)(ding)(ding)(ding)盤保持平(ping)(ping)衡，緊固(gu)(gu)(gu)支架(jia)與(yu)(yu)泵(beng)體(ti)固(gu)(gu)(gu)定(ding)(ding)(ding)(ding)(ding)連(lian)(lian)(lian)(lian)接(jie)(jie)(jie)，防護(hu)罩(zhao)與(yu)(yu)水(shui)(shui)泵(beng)相(xiang)連(lian)(lian)(lian)(lian)接(jie)(jie)(jie)，水(shui)(shui)泵(beng)與(yu)(yu)固(gu)(gu)(gu)定(ding)(ding)(ding)(ding)(ding)基(ji)(ji)座(zuo)(zuo)(zuo)相(xiang)連(lian)(lian)(lian)(lian)接(jie)(jie)(jie)，固(gu)(gu)(gu)定(ding)(ding)(ding)(ding)(ding)基(ji)(ji)座(zuo)(zuo)(zuo)與(yu)(yu)底座(zuo)(zuo)(zuo)緊固(gu)(gu)(gu)連(lian)(lian)(lian)(lian)接(jie)(jie)(jie)，底座(zuo)(zuo)(zuo)上設有加固(gu)(gu)(gu)件，緊固(gu)(gu)(gu)件)與(yu)(yu)底座(zuo)(zuo)(zuo)固(gu)(gu)(gu)定(ding)(ding)(ding)(ding)(ding)連(lian)(lian)(lian)(lian)接(jie)(jie)(jie)。

　　由于活(huo)(huo)(huo)(huo)(huo)塞(sai)(sai)(sai)體上(shang)端的(de)承壓(ya)面(mian)(mian)(mian)積(ji)(ji)比(bi)活(huo)(huo)(huo)(huo)(huo)塞(sai)(sai)(sai)體下端的(de)承壓(ya)面(mian)(mian)(mian)積(ji)(ji)減(jian)少了一根活(huo)(huo)(huo)(huo)(huo)塞(sai)(sai)(sai)桿的(de)面(mian)(mian)(mian)積(ji)(ji)，因此，密封(feng)油(you)壓(ya)力按(an)兩(liang)端承壓(ya)面(mian)(mian)(mian)積(ji)(ji)反比(bi)例地(di)增加(jia)，從(cong)而保證(zheng)密封(feng)條件。設(she)計(ji)活(huo)(huo)(huo)(huo)(huo)塞(sai)(sai)(sai)兩(liang)端承壓(ya)面(mian)(mian)(mian)積(ji)(ji)之(zhi)比(bi)時(shi)(shi)，應根據所要(yao)求的(de)密封(feng)腔與(yu)釜內(nei)的(de)壓(ya)力差來計(ji)算。活(huo)(huo)(huo)(huo)(huo)塞(sai)(sai)(sai)桿上(shang)裝有彈簧(huang)，調節彈簧(huang)的(de)壓(ya)縮量(liang)，使彈簧(huang)力正(zheng)好抵(di)消活(huo)(huo)(huo)(huo)(huo)塞(sai)(sai)(sai)上(shang)O形圈(quan)對缸(gang)壁的(de)摩擦力，以(yi)減(jian)少壓(ya)差計(ji)算值與(yu)實際之(zhi)間的(de)誤差。此外(wai)，活(huo)(huo)(huo)(huo)(huo)塞(sai)(sai)(sai)升降還有指示平衡(heng)罐中液(ye)位的(de)作用(yong)。當(dang)密封(feng)液(ye)漏泄需要(yao)補充時(shi)(shi)，可用(yong)手動泵(beng)加(jia)注密封(feng)液(ye)。在使用(yong)時(shi)(shi)需注意(yi)活(huo)(huo)(huo)(huo)(huo)塞(sai)(sai)(sai)應經常處于平衡(heng)罐的(de)下部位置，使活(huo)(huo)(huo)(huo)(huo)塞(sai)(sai)(sai)有向(xiang)上(shang)移動的(de)余地(di)。