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發布時間:2021-12-21 11:47:02 人氣:101463 來源:
青神機械密封件輔(fu)助密封的作(zuo)用是防止動(dong)環(huan)和靜環(huan)與壓蓋之間的泄漏;補償密封面的偏(pian)斜(xie)和振(zhen)動(dong),以(yi)保證密封面良(liang)好的貼合。這就要求(qiu)輔(fu)助密封的材料具(ju)有(you)一定的彈性。因此,首選(xuan)材料應是合成橡膠(jiao)等(deng)。
為(wei)有(you)效地密(mi)(mi)封(feng)(feng),必須(xu)利(li)用(yong)彈性(xing)元件(jian)(jian)使密(mi)(mi)封(feng)(feng)面保持(chi)(chi)接觸,因(yin)此,其中一(yi)個輔助密(mi)(mi)封(feng)(feng)能(neng)產生軸向(xiang)位(wei)移,以保持(chi)(chi)其密(mi)(mi)封(feng)(feng)性(xing)能(neng)(當采用(yong)波紋管密(mi)(mi)封(feng)(feng)時,由于(yu)(yu)它可(ke)(ke)以作(zuo)軸向(xiang)移動(dong)而(er)無須(xu)可(ke)(ke)動(dong)的輔助密(mi)(mi)封(feng)(feng)件(jian)(jian))。輔助密(mi)(mi)封(feng)(feng)件(jian)(jian)有(you)多種形狀,如平墊(dian)(dian)、O型(xing)圈(quan)(quan)、V型(xing)圈(quan)(quan)、U型(xing)圈(quan)(quan)等,后兩種主要適用(yong)于(yu)(yu)滑(hua)(hua)動(dong)件(jian)(jian)密(mi)(mi)封(feng)(feng),O型(xing)圈(quan)(quan)既可(ke)(ke)用(yong)于(yu)(yu)滑(hua)(hua)動(dong)密(mi)(mi)封(feng)(feng)也可(ke)(ke)用(yong)于(yu)(yu)靜密(mi)(mi)封(feng)(feng),平墊(dian)(dian)只可(ke)(ke)用(yong)于(yu)(yu)靜密(mi)(mi)封(feng)(feng)。
常用(yong)輔助密封材料的使用(yong)溫(wen)度(du)范(fan)圍和應用(yong)場合列(lie)在表1中(zhong)。