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發布時(shi)間(jian):2021-12-16 11:34:43 人氣:100151 來源:
孝感機械密封是靠一(yi)對或(huo)數對垂直于(yu)軸(zhou)作(zuo)相對滑動的端面在流體壓力和(he)補(bu)償機構的彈力(或(huo)磁(ci)力)作(zuo)用下(xia)保持貼合并配(pei)以輔助密封而達到阻(zu)漏的軸(zhou)封裝置(zhi)。
孝感機械密封的常用材料:
1.海(hai)水;常(chang)溫(wen)(wen);(動(dong)(dong)(dong))碳(tan)(tan)化(hua)(hua)鎢,1CR13堆焊鈷(gu)(gu)鉻(ge)鎢,鑄(zhu)(zhu)鐵;(靜)浸(jin)(jin)樹(shu)脂石(shi)墨(mo)(mo),碳(tan)(tan)化(hua)(hua)鎢,金(jin)屬陶瓷;過熱(re)水100度;(動(dong)(dong)(dong))碳(tan)(tan)化(hua)(hua)鎢,1CR13堆焊鈷(gu)(gu)鉻(ge)鎢,鑄(zhu)(zhu)鐵;(靜)浸(jin)(jin)樹(shu)脂石(shi)墨(mo)(mo),碳(tan)(tan)化(hua)(hua)鎢,金(jin)屬陶瓷。凈水;常(chang)溫(wen)(wen);(動(dong)(dong)(dong))9CR18,1CR13堆焊鈷(gu)(gu)鉻(ge)鎢,鑄(zhu)(zhu)鐵;(靜)浸(jin)(jin)樹(shu)脂石(shi)墨(mo)(mo),青(qing)銅,酚醛塑料,河水(含泥沙);常(chang)溫(wen)(wen);(動(dong)(dong)(dong))碳(tan)(tan)化(hua)(hua)鎢,(靜)碳(tan)(tan)化(hua)(hua)鎢。
2.汽(qi)油,潤滑(hua)(hua)油,液(ye)態(tai)烴(jing);常溫(wen);(動(dong))碳化(hua)鎢,1CR13堆焊鈷(gu)鉻鎢,鑄(zhu)鐵;(靜)浸樹脂(zhi)或(huo)錫(xi)銻合金石墨,酚醛塑料。汽(qi)油,潤滑(hua)(hua)油,液(ye)態(tai)烴(jing);100度;(動(dong))碳化(hua)鎢,1CR13堆焊鈷(gu)鉻鎢;(靜)浸青銅或(huo)樹脂(zhi)石墨。汽(qi)油,潤滑(hua)(hua)油,液(ye)態(tai)烴(jing);含顆粒;(動(dong))碳化(hua)鎢;(靜)碳化(hua)鎢。
密(mi)封(feng)材料(liao)應(ying)知足(zu)密(mi)封(feng)功能的要(yao)求。因為被密(mi)封(feng)的介質不(bu)同(tong)(tong),以及設(she)備的工(gong)作(zuo)前提不(bu)同(tong)(tong),要(yao)求密(mi)封(feng)材料(liao)的具有不(bu)同(tong)(tong)的適(shi)應(ying)性(xing)。對密(mi)封(feng)材料(liao)的要(yao)求一般是:
1.高溫(wen)下不(bu)(bu)軟化(hua),不(bu)(bu)分解,低溫(wen)下不(bu)(bu)硬(ying)化(hua),不(bu)(bu)脆裂,抗侵蝕機能好,在酸,堿,油等介(jie)質中能長期工作(zuo),其體積和硬(ying)度變化(hua)小(xiao),且(qie)不(bu)(bu)粘附(fu)在金屬表面上,摩擦系數小(xiao),耐磨性好。
2.具(ju)有(you)與(yu)密封面結合(he)的(de)(de)柔軟(ruan)性,耐老化性好,經久耐用(yong),加工制造利便(bian),價格便(bian)宜,取材輕(qing)易(yi),橡膠(jiao)是常(chang)用(yong)的(de)(de)密封材料(liao)。除橡膠(jiao)外,適合(he)于做密封材料(liao)的(de)(de)還有(you)石墨等,聚四氟乙烯以及各種密封膠(jiao)等。
3.材(cai)料(liao)致(zhi)密性好(hao),不易泄露介質,有(you)適當的機械(xie)強度和(he)硬(ying)度,壓(ya)縮性和(he)回彈性好(hao),變(bian)形小。