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發(fa)布(bu)時(shi)間(jian):2021-12-21 11:47:02 人氣:101471 來(lai)源:
南呂鎮機械密封件輔(fu)助(zhu)密(mi)封(feng)的作用是(shi)防止動環(huan)和(he)靜(jing)環(huan)與壓蓋之(zhi)間的泄漏(lou);補償密(mi)封(feng)面的偏(pian)斜和(he)振(zhen)動,以(yi)保(bao)證密(mi)封(feng)面良好的貼合。這就要求輔(fu)助(zhu)密(mi)封(feng)的材(cai)料具有一定的彈(dan)性(xing)。因此(ci),首(shou)選材(cai)料應是(shi)合成橡膠等。
為有效地密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)(feng),必(bi)須利用彈性元件(jian)使密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)(feng)面保持接觸,因此,其中(zhong)一個(ge)輔(fu)(fu)助(zhu)(zhu)密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)(feng)能產(chan)生軸向位移,以保持其密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)(feng)性能(當采用波紋管(guan)密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)(feng)時,由于它可以作軸向移動(dong)(dong)而無須可動(dong)(dong)的(de)輔(fu)(fu)助(zhu)(zhu)密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)(feng)件(jian))。輔(fu)(fu)助(zhu)(zhu)密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)(feng)件(jian)有多(duo)種形狀(zhuang),如(ru)平墊(dian)、O型(xing)圈、V型(xing)圈、U型(xing)圈等,后兩種主要適用于滑動(dong)(dong)件(jian)密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)(feng),O型(xing)圈既可用于滑動(dong)(dong)密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)(feng)也可用于靜(jing)(jing)密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)(feng),平墊(dian)只可用于靜(jing)(jing)密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)(feng)。
常用(yong)(yong)輔助(zhu)密(mi)封材(cai)料的使用(yong)(yong)溫度范圍(wei)和應用(yong)(yong)場合列在表1中(zhong)。