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發布時(shi)間(jian):2021-12-21 11:47:02 人氣:100484 來源:
紅原機械密封件(jian)輔(fu)助密封(feng)(feng)的作(zuo)用是防止動(dong)環和靜環與壓(ya)蓋之間的泄漏;補(bu)償密封(feng)(feng)面的偏(pian)斜和振動(dong),以保證(zheng)密封(feng)(feng)面良好的貼合(he)。這就(jiu)要求輔(fu)助密封(feng)(feng)的材料(liao)(liao)具有一定的彈性(xing)。因(yin)此,首選材料(liao)(liao)應是合(he)成橡膠等。
為有(you)效地密封(feng)(feng)(feng)(feng),必(bi)須(xu)利(li)用(yong)彈性元件使密封(feng)(feng)(feng)(feng)面保持(chi)接觸,因(yin)此(ci),其(qi)中(zhong)一個輔助密封(feng)(feng)(feng)(feng)能(neng)產(chan)生(sheng)軸向位移(yi),以(yi)保持(chi)其(qi)密封(feng)(feng)(feng)(feng)性能(neng)(當采(cai)用(yong)波紋管密封(feng)(feng)(feng)(feng)時,由于它可以(yi)作軸向移(yi)動(dong)而(er)無須(xu)可動(dong)的(de)輔助密封(feng)(feng)(feng)(feng)件)。輔助密封(feng)(feng)(feng)(feng)件有(you)多(duo)種(zhong)形狀(zhuang),如(ru)平(ping)墊、O型(xing)(xing)圈、V型(xing)(xing)圈、U型(xing)(xing)圈等,后兩種(zhong)主(zhu)要適用(yong)于滑動(dong)件密封(feng)(feng)(feng)(feng),O型(xing)(xing)圈既可用(yong)于滑動(dong)密封(feng)(feng)(feng)(feng)也(ye)可用(yong)于靜密封(feng)(feng)(feng)(feng),平(ping)墊只可用(yong)于靜密封(feng)(feng)(feng)(feng)。
常(chang)用輔助密封材料的(de)使用溫度范圍(wei)和應用場(chang)合列在表(biao)1中(zhong)。