紫金機械密封又(you)叫端面密(mi)封，在(zai)有(you)關標準(zhun)中是(shi)這樣解說的(de)(de)：由至少一對垂直(zhi)于旋轉軸(zhou)線的(de)(de)端面在(zai)流體壓力和補償機構(gou)彈(dan)力的(de)(de)作(zuo)用以及輔助(zhu)密(mi)封的(de)(de)配合下保持(chi)貼合并相對滑動(dong)而(er)構(gou)成的(de)(de)防止流體泄漏的(de)(de)裝置。

　　紫金機械密封自身(shen)壓(ya)(ya)(ya)(ya)力增(zeng)壓(ya)(ya)(ya)(ya)系(xi)統結構包括出水(shui)口(kou)、固(gu)(gu)(gu)(gu)(gu)(gu)(gu)(gu)定(ding)(ding)(ding)(ding)法蘭(lan)、泵體、增(zeng)壓(ya)(ya)(ya)(ya)裝置、電機轉子、吊(diao)環、防護(hu)罩(zhao)、水(shui)泵、固(gu)(gu)(gu)(gu)(gu)(gu)(gu)(gu)定(ding)(ding)(ding)(ding)基座、底座、加固(gu)(gu)(gu)(gu)(gu)(gu)(gu)(gu)件、控制閥(fa)、緊(jin)固(gu)(gu)(gu)(gu)(gu)(gu)(gu)(gu)件，所述出水(shui)口(kou)與(yu)固(gu)(gu)(gu)(gu)(gu)(gu)(gu)(gu)定(ding)(ding)(ding)(ding)法蘭(lan)相連(lian)接(jie)，泵體與(yu)增(zeng)壓(ya)(ya)(ya)(ya)裝置相連(lian)接(jie)，增(zeng)壓(ya)(ya)(ya)(ya)裝置由(you)進水(shui)口(kou)、水(shui)管(guan)(guan)、負壓(ya)(ya)(ya)(ya)室、平衡(heng)固(gu)(gu)(gu)(gu)(gu)(gu)(gu)(gu)定(ding)(ding)(ding)(ding)盤(pan)、緊(jin)固(gu)(gu)(gu)(gu)(gu)(gu)(gu)(gu)支架組成(cheng)，進水(shui)口(kou)與(yu)水(shui)管(guan)(guan)相連(lian)接(jie)，水(shui)管(guan)(guan)與(yu)負壓(ya)(ya)(ya)(ya)室相連(lian)接(jie)，負壓(ya)(ya)(ya)(ya)室通過(guo)平衡(heng)固(gu)(gu)(gu)(gu)(gu)(gu)(gu)(gu)定(ding)(ding)(ding)(ding)盤(pan)保持平衡(heng)，緊(jin)固(gu)(gu)(gu)(gu)(gu)(gu)(gu)(gu)支架與(yu)泵體固(gu)(gu)(gu)(gu)(gu)(gu)(gu)(gu)定(ding)(ding)(ding)(ding)連(lian)接(jie)，防護(hu)罩(zhao)與(yu)水(shui)泵相連(lian)接(jie)，水(shui)泵與(yu)固(gu)(gu)(gu)(gu)(gu)(gu)(gu)(gu)定(ding)(ding)(ding)(ding)基座相連(lian)接(jie)，固(gu)(gu)(gu)(gu)(gu)(gu)(gu)(gu)定(ding)(ding)(ding)(ding)基座與(yu)底座緊(jin)固(gu)(gu)(gu)(gu)(gu)(gu)(gu)(gu)連(lian)接(jie)，底座上設有加固(gu)(gu)(gu)(gu)(gu)(gu)(gu)(gu)件，緊(jin)固(gu)(gu)(gu)(gu)(gu)(gu)(gu)(gu)件與(yu)底座固(gu)(gu)(gu)(gu)(gu)(gu)(gu)(gu)定(ding)(ding)(ding)(ding)連(lian)接(jie)。

　　動環和靜環的總稱叫做密封環，是構成紫金機械密封件主要的元件。密封環在很大程度上決定了紫金機械密封件的使用性能和壽命，所以紫金機械密封件對(dui)密封環有一些特(te)定(ding)的要求。

　　一、密封環要容易加工(gong)制造

　　二、安裝和維修(xiu)要方便，價格要低(di)廉。

　　三、密封環要有良好(hao)的耐(nai)熱沖擊能力，因(yin)此材料要有較高的導熱系(xi)數和較小的線(xian)膨脹(zhang)系(xi)數，承受熱沖擊時不至于開裂。

　　四(si)、密(mi)封(feng)環(huan)要(yao)有(you)良好的自潤滑性，防止工作中發生短時間(jian)的干(gan)摩擦，不損傷(shang)密(mi)封(feng)端面。因此，密(mi)封(feng)環(huan)材料與密(mi)封(feng)流(liu)體還要(yao)有(you)很(hen)好的浸潤性。

　　五、結構簡單

　　密封環(huan)(huan)結構(gou)(gou)簡單對稱(cheng)，優先考慮(lv)用(yong)整體(ti)型結構(gou)(gou)，也可采用(yong)組合式(shi)密封環(huan)(huan)，盡量(liang)避免用(yong)密封端面(mian)噴涂(tu)式(shi)結構(gou)(gou)。

　　六、有足夠的強度(du)和剛度(du)

　　紫金機械密封件在工(gong)作條件下不損壞，變(bian)形應盡(jin)量的(de)(de)小，工(gong)作條件波動(dong)時仍能(neng)保持密(mi)封性。尤其是密(mi)封端面要有足(zu)夠的(de)(de)強度以(yi)及一定的(de)(de)耐腐蝕能(neng)力，保證產(chan)品的(de)(de)使用壽命。