黑水機械密封又叫端面密封(feng)，在有(you)關標準中是這樣解說的(de)(de)：由(you)至(zhi)少(shao)一對垂直于旋(xuan)轉(zhuan)軸(zhou)線(xian)的(de)(de)端面在流體壓(ya)力和(he)補償機構(gou)彈力的(de)(de)作用以及輔助密封(feng)的(de)(de)配合(he)下保持貼合(he)并(bing)相對滑(hua)動而構(gou)成的(de)(de)防止流體泄漏的(de)(de)裝置。

　　黑水機械密封自身壓(ya)(ya)(ya)力(li)增(zeng)壓(ya)(ya)(ya)系統結(jie)構包括出水(shui)(shui)(shui)(shui)(shui)(shui)口、固(gu)(gu)(gu)定(ding)(ding)(ding)(ding)法蘭(lan)、泵體、增(zeng)壓(ya)(ya)(ya)裝(zhuang)置、電(dian)機轉(zhuan)子、吊環、防(fang)護罩、水(shui)(shui)(shui)(shui)(shui)(shui)泵、固(gu)(gu)(gu)定(ding)(ding)(ding)(ding)基座、底(di)座、加固(gu)(gu)(gu)件(jian)、控(kong)制(zhi)閥、緊固(gu)(gu)(gu)件(jian)，所(suo)述(shu)出水(shui)(shui)(shui)(shui)(shui)(shui)口與固(gu)(gu)(gu)定(ding)(ding)(ding)(ding)法蘭(lan)相連(lian)(lian)(lian)接(jie)，泵體與增(zeng)壓(ya)(ya)(ya)裝(zhuang)置相連(lian)(lian)(lian)接(jie)，增(zeng)壓(ya)(ya)(ya)裝(zhuang)置由進(jin)水(shui)(shui)(shui)(shui)(shui)(shui)口、水(shui)(shui)(shui)(shui)(shui)(shui)管(guan)、負(fu)壓(ya)(ya)(ya)室、平(ping)衡固(gu)(gu)(gu)定(ding)(ding)(ding)(ding)盤、緊固(gu)(gu)(gu)支架(jia)組成，進(jin)水(shui)(shui)(shui)(shui)(shui)(shui)口與水(shui)(shui)(shui)(shui)(shui)(shui)管(guan)相連(lian)(lian)(lian)接(jie)，水(shui)(shui)(shui)(shui)(shui)(shui)管(guan)與負(fu)壓(ya)(ya)(ya)室相連(lian)(lian)(lian)接(jie)，負(fu)壓(ya)(ya)(ya)室通過平(ping)衡固(gu)(gu)(gu)定(ding)(ding)(ding)(ding)盤保持平(ping)衡，緊固(gu)(gu)(gu)支架(jia)與泵體固(gu)(gu)(gu)定(ding)(ding)(ding)(ding)連(lian)(lian)(lian)接(jie)，防(fang)護罩與水(shui)(shui)(shui)(shui)(shui)(shui)泵相連(lian)(lian)(lian)接(jie)，水(shui)(shui)(shui)(shui)(shui)(shui)泵與固(gu)(gu)(gu)定(ding)(ding)(ding)(ding)基座相連(lian)(lian)(lian)接(jie)，固(gu)(gu)(gu)定(ding)(ding)(ding)(ding)基座與底(di)座緊固(gu)(gu)(gu)連(lian)(lian)(lian)接(jie)，底(di)座上設(she)有加固(gu)(gu)(gu)件(jian)，緊固(gu)(gu)(gu)件(jian)與底(di)座固(gu)(gu)(gu)定(ding)(ding)(ding)(ding)連(lian)(lian)(lian)接(jie)。

　　動環和靜環的總稱叫做密封環，是構成黑水機械密封件主要的元件。密封環在很大程度上決定了黑水機械密封件的使用性能和壽命，所以黑水機械密封件(jian)對密封(feng)環有一(yi)些特定的要求(qiu)。

　　一、密封環要容易加(jia)工制(zhi)造(zao)

　　二、安裝和維修(xiu)要(yao)方便，價(jia)格要(yao)低(di)廉(lian)。

　　三、密封環(huan)要有良(liang)好的耐熱(re)沖擊能力，因此材(cai)料要有較高的導熱(re)系(xi)數(shu)和較小的線(xian)膨脹系(xi)數(shu)，承受熱(re)沖擊時不(bu)至于開裂(lie)。

　　四、密(mi)封(feng)環(huan)要(yao)有良(liang)好(hao)的自潤(run)滑性，防止工作中發生短時間(jian)的干摩擦(ca)，不損傷密(mi)封(feng)端面。因此，密(mi)封(feng)環(huan)材料與密(mi)封(feng)流體(ti)還要(yao)有很好(hao)的浸潤(run)性。

　　五、結構簡單

　　密封(feng)環結(jie)構(gou)(gou)簡單對稱(cheng)，優先考慮用整體(ti)型結(jie)構(gou)(gou)，也可采用組合式密封(feng)環，盡(jin)量避(bi)免用密封(feng)端面(mian)噴(pen)涂式結(jie)構(gou)(gou)。

　　六、有足夠的強度和剛度

　　黑水機械密封件(jian)在(zai)工作條件(jian)下(xia)不損壞(huai)，變(bian)形應盡量(liang)的(de)小(xiao)，工作條件(jian)波(bo)動時仍能保持密(mi)封(feng)性。尤其是密(mi)封(feng)端面要有足夠(gou)的(de)強度以及一定的(de)耐腐蝕能力，保證產品的(de)使用壽命。