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發布時間:2021-12-21 11:47:02 人(ren)氣:100157 來源:
阜南機械密封件輔助密(mi)封(feng)的(de)作(zuo)用是防止動(dong)環和靜環與壓蓋之間的(de)泄漏;補償密(mi)封(feng)面的(de)偏斜和振動(dong),以保證(zheng)密(mi)封(feng)面良好(hao)的(de)貼合。這就要求(qiu)輔助密(mi)封(feng)的(de)材料(liao)具有一定的(de)彈(dan)性。因此,首選材料(liao)應是合成(cheng)橡膠等。
為有效地密(mi)(mi)(mi)(mi)(mi)(mi)封(feng)(feng),必須(xu)(xu)利(li)用(yong)(yong)(yong)彈性元(yuan)件(jian)(jian)使密(mi)(mi)(mi)(mi)(mi)(mi)封(feng)(feng)面保(bao)持(chi)接觸,因此,其(qi)中(zhong)一(yi)個輔助密(mi)(mi)(mi)(mi)(mi)(mi)封(feng)(feng)能產生軸(zhou)向位移,以(yi)保(bao)持(chi)其(qi)密(mi)(mi)(mi)(mi)(mi)(mi)封(feng)(feng)性能(當采用(yong)(yong)(yong)波(bo)紋(wen)管密(mi)(mi)(mi)(mi)(mi)(mi)封(feng)(feng)時,由(you)于(yu)它可以(yi)作(zuo)軸(zhou)向移動而(er)無(wu)須(xu)(xu)可動的輔助密(mi)(mi)(mi)(mi)(mi)(mi)封(feng)(feng)件(jian)(jian))。輔助密(mi)(mi)(mi)(mi)(mi)(mi)封(feng)(feng)件(jian)(jian)有多種形狀,如平墊、O型圈、V型圈、U型圈等,后兩種主(zhu)要(yao)適(shi)用(yong)(yong)(yong)于(yu)滑動件(jian)(jian)密(mi)(mi)(mi)(mi)(mi)(mi)封(feng)(feng),O型圈既可用(yong)(yong)(yong)于(yu)滑動密(mi)(mi)(mi)(mi)(mi)(mi)封(feng)(feng)也可用(yong)(yong)(yong)于(yu)靜(jing)密(mi)(mi)(mi)(mi)(mi)(mi)封(feng)(feng),平墊只可用(yong)(yong)(yong)于(yu)靜(jing)密(mi)(mi)(mi)(mi)(mi)(mi)封(feng)(feng)。
常用輔助密封材(cai)料的使用溫度范(fan)圍和應用場合列在表(biao)1中。