房縣機械密封件輔助(zhu)密(mi)封的作用是防止動環和靜環與壓蓋之間的泄漏;補償密(mi)封面的偏(pian)斜和振動，以保證(zheng)密(mi)封面良好的貼合。這(zhe)就(jiu)要求輔助(zhu)密(mi)封的材(cai)料(liao)具有一定的彈性。因此(ci)，首選材(cai)料(liao)應是合成橡膠等。

　　為(wei)有效地密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)，必須利用(yong)(yong)(yong)(yong)彈性(xing)(xing)元件(jian)使密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)面保(bao)持(chi)(chi)接觸，因此，其中一個輔(fu)助密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)能(neng)產(chan)生軸(zhou)向位移，以保(bao)持(chi)(chi)其密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)性(xing)(xing)能(neng)(當采(cai)用(yong)(yong)(yong)(yong)波紋(wen)管密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)時，由于(yu)(yu)它可以作軸(zhou)向移動而(er)無(wu)須可動的輔(fu)助密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)件(jian))。輔(fu)助密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)件(jian)有多種形狀，如平墊、O型(xing)圈(quan)、V型(xing)圈(quan)、U型(xing)圈(quan)等，后(hou)兩種主(zhu)要適用(yong)(yong)(yong)(yong)于(yu)(yu)滑(hua)動件(jian)密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)，O型(xing)圈(quan)既可用(yong)(yong)(yong)(yong)于(yu)(yu)滑(hua)動密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)也可用(yong)(yong)(yong)(yong)于(yu)(yu)靜密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)，平墊只可用(yong)(yong)(yong)(yong)于(yu)(yu)靜密(mi)(mi)(mi)封(feng)(feng)(feng)(feng)。

　　常(chang)用輔助密封材料的使用溫度范(fan)圍(wei)和應用場(chang)合列在表(biao)1中(zhong)。