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發布時(shi)間:2021-12-21 11:47:02 人氣:101467 來源:
平定機械密封件輔助密封的作用是防止(zhi)動環和(he)靜環與壓(ya)蓋(gai)之(zhi)間的泄(xie)漏;補償密封面的偏斜和(he)振動,以保(bao)證密封面良好的貼合。這就要求輔助密封的材料(liao)具有(you)一定的彈性。因此,首選材料(liao)應是合成(cheng)橡膠(jiao)等。
為有效地密(mi)封(feng)(feng)(feng)(feng),必須(xu)利用(yong)(yong)彈性(xing)元(yuan)件(jian)使密(mi)封(feng)(feng)(feng)(feng)面保持接(jie)觸,因此,其中一個輔助(zhu)密(mi)封(feng)(feng)(feng)(feng)能產生軸(zhou)向位(wei)移,以保持其密(mi)封(feng)(feng)(feng)(feng)性(xing)能(當采(cai)用(yong)(yong)波紋管密(mi)封(feng)(feng)(feng)(feng)時,由于它可(ke)以作(zuo)軸(zhou)向移動(dong)(dong)而無須(xu)可(ke)動(dong)(dong)的(de)輔助(zhu)密(mi)封(feng)(feng)(feng)(feng)件(jian))。輔助(zhu)密(mi)封(feng)(feng)(feng)(feng)件(jian)有多種形(xing)狀,如平墊、O型(xing)(xing)圈(quan)、V型(xing)(xing)圈(quan)、U型(xing)(xing)圈(quan)等,后兩種主要適用(yong)(yong)于滑(hua)動(dong)(dong)件(jian)密(mi)封(feng)(feng)(feng)(feng),O型(xing)(xing)圈(quan)既可(ke)用(yong)(yong)于滑(hua)動(dong)(dong)密(mi)封(feng)(feng)(feng)(feng)也可(ke)用(yong)(yong)于靜(jing)密(mi)封(feng)(feng)(feng)(feng),平墊只可(ke)用(yong)(yong)于靜(jing)密(mi)封(feng)(feng)(feng)(feng)。
常用(yong)輔助密封(feng)材料的使用(yong)溫度范圍和應用(yong)場合(he)列在表1中(zhong)。