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防(fang)爆電(dian)機密封(feng)圈(quan)(v型圈(quan))的(de)(de)(de)材料以丁腈橡(xiang)(xiang)膠(jiao)(jiao)和(he)氯(lv)丁橡(xiang)(xiang)膠(jiao)(jiao)最常用(yong)(yong),天然橡(xiang)(xiang)膠(jiao)(jiao)用(yong)(yong)于(yu)(yu)對水和(he)空(kong)氣的(de)(de)(de)密封(feng),丁基(ji)橡(xiang)(xiang)膠(jiao)(jiao)用(yong)(yong)于(yu)(yu)不燃性(xing)液壓(ya)油(you)和(he)磷酸酯(zhi)系液壓(ya)油(you)。氯(lv)橡(xiang)(xiang)膠(jiao)(jiao)用(yong)(yong)于(yu)(yu)各種化(hua)學(xue)品和(he)高(gao)溫。當(dang)要求耐磨(mo)時(shi),用(yong)(yong)聚氨酯(zhi)橡(xiang)(xiang)膠(jiao)(jiao)。夾(jia)織(zhi)(zhi)物(wu)橡(xiang)(xiang)膠(jiao)(jiao)也是(shi)V形圈(quan)常用(yong)(yong)材料,其特點是(shi)增加(jia)密封(feng)圈(quan)的(de)(de)(de)剛度(du)和(he)強度(du),防(fang)止發生(sheng)膠(jiao)(jiao)料擠出,間隙咬傷現象,使之適(shi)用(yong)(yong)于(yu)(yu)高(gao)壓(ya)。同時(shi),在磨(mo)損(sun)過程中,橡(xiang)(xiang)膠(jiao)(jiao)先于(yu)(yu)織(zhi)(zhi)物(wu)產生(sheng)磨(mo)損(sun),當(dang)接觸壓(ya)力(li)大的(de)(de)(de)部(bu)位擴展,這樣整個密封(feng)面(mian)的(de)(de)(de)磨(mo)損(sun)趨于(yu)(yu)均勻,而(er)摩擦卻(que)沒(mei)有明顯(xian)變化(hua)。但是(shi),夾(jia)織(zhi)(zhi)物(wu)橡(xiang)(xiang)膠(jiao)(jiao)密封(feng)圈(quan)的(de)(de)(de)唇容易把滑(hua)(hua)動面(mian)上(shang)的(de)(de)(de)油(you)膜刮去(qu),故潤滑(hua)(hua)性(xing)比較差。 壓(ya)環和(he)支(zhi)(zhi)承(cheng)環一般有較硬的(de)(de)(de)膠(jiao)(jiao)布(bu)壓(ya)制而(er)成,支(zhi)(zhi)承(cheng)環有時(shi)也用(yong)(yong)硬塑料壓(ya)制。
河南南洋防(fang)(fang)爆(bao)電機有限公司生產的(de)防(fang)(fang)爆(bao)電機密封圈(v型圈);規格參數(shu)有:16X20,20X20,24X20,28X20,30X20,32X20,36X25,42X25,50X25,58X25,68X30,72X32,80X30,90X38,105X45,115X50;