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發布(bu)時間:2021-12-21 11:47:02 人(ren)氣(qi):95792 來源:
河曲機械密封件輔助(zhu)密(mi)封(feng)的作用是防止(zhi)動環(huan)和(he)靜(jing)環(huan)與(yu)壓蓋之間的泄漏;補償密(mi)封(feng)面的偏斜和(he)振動,以(yi)保證(zheng)密(mi)封(feng)面良好的貼合。這(zhe)就要求輔助(zhu)密(mi)封(feng)的材(cai)料(liao)(liao)具有一定(ding)的彈性(xing)。因此,首選(xuan)材(cai)料(liao)(liao)應是合成橡(xiang)膠(jiao)等(deng)。
為有(you)效地密(mi)(mi)封(feng)(feng)(feng)(feng),必(bi)須(xu)利(li)用(yong)(yong)彈性(xing)元件使密(mi)(mi)封(feng)(feng)(feng)(feng)面(mian)保持接觸,因此,其(qi)(qi)中一個(ge)輔助(zhu)密(mi)(mi)封(feng)(feng)(feng)(feng)能產生(sheng)軸向位移,以保持其(qi)(qi)密(mi)(mi)封(feng)(feng)(feng)(feng)性(xing)能(當采用(yong)(yong)波紋管(guan)密(mi)(mi)封(feng)(feng)(feng)(feng)時,由于(yu)它可以作軸向移動(dong)而(er)無須(xu)可動(dong)的輔助(zhu)密(mi)(mi)封(feng)(feng)(feng)(feng)件)。輔助(zhu)密(mi)(mi)封(feng)(feng)(feng)(feng)件有(you)多種(zhong)形狀,如平(ping)墊(dian)、O型(xing)圈(quan)、V型(xing)圈(quan)、U型(xing)圈(quan)等,后(hou)兩種(zhong)主要適用(yong)(yong)于(yu)滑(hua)動(dong)件密(mi)(mi)封(feng)(feng)(feng)(feng),O型(xing)圈(quan)既(ji)可用(yong)(yong)于(yu)滑(hua)動(dong)密(mi)(mi)封(feng)(feng)(feng)(feng)也可用(yong)(yong)于(yu)靜密(mi)(mi)封(feng)(feng)(feng)(feng),平(ping)墊(dian)只(zhi)可用(yong)(yong)于(yu)靜密(mi)(mi)封(feng)(feng)(feng)(feng)。
常(chang)用輔(fu)助密封材料的使用溫度范圍(wei)和應用場合列在表1中。