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發布時間:2021-12-16 11:34:43 人氣(qi):100035 來源:
邊壩機械密封是靠(kao)一對(dui)或數對(dui)垂(chui)直于軸作相對(dui)滑(hua)動的端面在(zai)流體壓力和補償機構的彈力(或磁(ci)力)作用(yong)下保持貼合(he)并配以(yi)輔助(zhu)密封(feng)而(er)達到阻漏(lou)的軸封(feng)裝置。
邊壩機械密封的常用材料:
1.海水;常(chang)(chang)溫(wen)(wen);(動(dong)(dong)(dong))碳(tan)化(hua)鎢(wu)(wu)(wu)(wu)(wu),1CR13堆(dui)焊鈷(gu)鉻鎢(wu)(wu)(wu)(wu)(wu),鑄鐵;(靜(jing))浸樹脂(zhi)石(shi)墨(mo),碳(tan)化(hua)鎢(wu)(wu)(wu)(wu)(wu),金屬(shu)陶瓷;過熱水100度;(動(dong)(dong)(dong))碳(tan)化(hua)鎢(wu)(wu)(wu)(wu)(wu),1CR13堆(dui)焊鈷(gu)鉻鎢(wu)(wu)(wu)(wu)(wu),鑄鐵;(靜(jing))浸樹脂(zhi)石(shi)墨(mo),碳(tan)化(hua)鎢(wu)(wu)(wu)(wu)(wu),金屬(shu)陶瓷。凈水;常(chang)(chang)溫(wen)(wen);(動(dong)(dong)(dong))9CR18,1CR13堆(dui)焊鈷(gu)鉻鎢(wu)(wu)(wu)(wu)(wu),鑄鐵;(靜(jing))浸樹脂(zhi)石(shi)墨(mo),青銅,酚醛塑料,河水(含泥沙(sha));常(chang)(chang)溫(wen)(wen);(動(dong)(dong)(dong))碳(tan)化(hua)鎢(wu)(wu)(wu)(wu)(wu),(靜(jing))碳(tan)化(hua)鎢(wu)(wu)(wu)(wu)(wu)。
2.汽(qi)油,潤滑油,液態(tai)烴;常(chang)溫(wen);(動)碳(tan)(tan)化(hua)鎢(wu),1CR13堆焊(han)(han)鈷(gu)鉻(ge)鎢(wu),鑄鐵;(靜(jing)(jing))浸樹(shu)脂或(huo)錫銻(ti)合(he)金石墨(mo),酚醛塑料。汽(qi)油,潤滑油,液態(tai)烴;100度;(動)碳(tan)(tan)化(hua)鎢(wu),1CR13堆焊(han)(han)鈷(gu)鉻(ge)鎢(wu);(靜(jing)(jing))浸青銅或(huo)樹(shu)脂石墨(mo)。汽(qi)油,潤滑油,液態(tai)烴;含(han)顆(ke)粒;(動)碳(tan)(tan)化(hua)鎢(wu);(靜(jing)(jing))碳(tan)(tan)化(hua)鎢(wu)。
密封材(cai)料(liao)應知足密封功能的要(yao)求(qiu)。因為被密封的介質不(bu)同,以及設備的工作前提不(bu)同,要(yao)求(qiu)密封材(cai)料(liao)的具有不(bu)同的適應性。對密封材(cai)料(liao)的要(yao)求(qiu)一(yi)般是:
1.高(gao)溫下(xia)不軟化(hua)(hua)(hua),不分(fen)解,低(di)溫下(xia)不硬化(hua)(hua)(hua),不脆裂(lie),抗侵蝕機(ji)能好,在(zai)酸,堿,油等介質中能長期工作,其(qi)體積和硬度變化(hua)(hua)(hua)小(xiao),且不粘附在(zai)金屬表面(mian)上,摩擦(ca)系數小(xiao),耐磨性(xing)好。
2.具有與密封(feng)面結(jie)合的(de)(de)柔(rou)軟性(xing),耐(nai)老化性(xing)好,經久耐(nai)用(yong),加工制造利便,價格便宜,取(qu)材(cai)(cai)(cai)輕(qing)易,橡膠是常用(yong)的(de)(de)密封(feng)材(cai)(cai)(cai)料。除橡膠外,適合于做密封(feng)材(cai)(cai)(cai)料的(de)(de)還有石(shi)墨等,聚四氟(fu)乙烯以及各(ge)種(zhong)密封(feng)膠等。
3.材料致密性(xing)(xing)好,不易泄露介質,有適當(dang)的機械(xie)強度和(he)硬度,壓縮性(xing)(xing)和(he)回彈(dan)性(xing)(xing)好,變形小。