1、橡膠軟管總成
1)高(gao)(gao)壓(ya)膠(jiao)(jiao)(jiao)管由內(nei)(nei)膠(jiao)(jiao)(jiao)層(ceng)、提(ti)高(gao)(gao)層(ceng)和(he)(he)外膠(jiao)(jiao)(jiao)層(ceng)構成(如圖例),內(nei)(nei)膠(jiao)(jiao)(jiao)層(ceng)立即與液(ye)壓(ya)油觸碰(peng),故規(gui)定在(zai)(zai)長期(qi)性(xing)(xing)運行狀(zhuang)態下不(bu)可受液(ye)體浸蝕,能(neng)(neng)補漏。在(zai)(zai)提(ti)高(gao)(gao)層(ceng)功效下會(hui)承擔一(yi)定工作壓(ya)力。因而,宜(yi)選用(yong)丁腈橡膠(jiao)(jiao)(jiao),除(chu)塑(su)膠(jiao)(jiao)(jiao)粒外,危(wei)(wei)(wei)害(hai)性(xing)(xing)能(neng)(neng)的(de)關鍵(jian)要(yao)素也(ye)有(you)內(nei)(nei)膠(jiao)(jiao)(jiao)層(ceng)的(de)強(qiang)(qiang)度(du)、薄(bo)厚(hou)和(he)(he)永久(jiu)性(xing)(xing)形變量。強(qiang)(qiang)度(du)和(he)(he)永久(jiu)性(xing)(xing)形變量對(dui)密封(feng)性(xing)(xing)性(xing)(xing)能(neng)(neng)危(wei)(wei)(wei)害(hai)非(fei)常大。一(yi)般強(qiang)(qiang)度(du)高(gao)(gao)、縮(suo)(suo)小(xiao)后(hou)的(de)永久(jiu)性(xing)(xing)形變量小(xiao),密封(feng)性(xing)(xing)性(xing)(xing)能(neng)(neng)則越好。一(yi)般是在(zai)(zai)70~85邵氏硬(ying)度(du),縮(suo)(suo)小(xiao)永久(jiu)性(xing)(xing)形變50%時(shi)。內(nei)(nei)膠(jiao)(jiao)(jiao)層(ceng)薄(bo)厚(hou)建(jian)議是為1.5~2.5mm,太厚(hou)會(hui)在(zai)(zai)壓(ya)扣時(shi)提(ti)升其流動(dong)率,導(dao)致(zhi)不(bu)必要(yao)的(de)膠(jiao)(jiao)(jiao)在(zai)(zai)接頭芯套與橡膠(jiao)(jiao)(jiao)軟管的(de)觸碰(peng)內(nei)(nei)孔內(nei)(nei)沉積,減少商品流通橫截(jie)面;過(guo)薄(bo)會(hui)在(zai)(zai)壓(ya)扣時(shi)被壓(ya)裂(lie)。另外內(nei)(nei)膠(jiao)(jiao)(jiao)層(ceng)壁厚(hou)勻稱性(xing)(xing)也(ye)很重(zhong)要(yao)。假(jia)如薄(bo)厚(hou)不(bu)勻,縮(suo)(suo)小(xiao)后(hou)會(hui)導(dao)致(zhi)一(yi)面裂(lie)斷(duan)、一(yi)面堆膠(jiao)(jiao)(jiao)。內(nei)(nei)膠(jiao)(jiao)(jiao)層(ceng)表層(ceng)出現的(de)浮銹也(ye)是危(wei)(wei)(wei)害(hai)性(xing)(xing)能(neng)(neng)品質的(de)關鍵(jian)要(yao)素。
2)高壓(ya)膠(jiao)(jiao)管(guan)關(guan)鍵借助提高層(ceng)來承(cheng)受力。手(shou)工(gong)編(bian)織橡膠(jiao)(jiao)軟管(guan)是(shi)靠膠(jiao)(jiao)漿與內外黏膠(jiao)(jiao)粘緊,因為同一(yi)手(shou)工(gong)編(bian)織層(ceng)內不(bu)(bu)銹(xiu)鋼絲中(zhong)間(jian)(jian)的(de)(de)互相觸碰(peng),在承(cheng)擔(dan)氣體壓(ya)力的(de)(de)時候會(hui)因分別伸(shen)縮(suo)式不(bu)(bu)一(yi)而導致不(bu)(bu)銹(xiu)鋼絲彼(bi)此之(zhi)間(jian)(jian)的(de)(de)摩擦而危害(hai)其使(shi)用(yong)性能(neng)。而螺旋(xuan)波紋管(guan)是(shi)由盤繞方位不(bu)(bu)一(yi)樣的(de)(de)雙(shuang)層(ceng)產生一(yi)個工(gong)作(zuo)中(zhong)層(ceng),在雙(shuang)層(ceng)中(zhong)間(jian)(jian)有正中(zhong)間(jian)(jian)膠(jiao)(jiao),因而同一(yi)工(gong)作(zuo)中(zhong)層(ceng)的(de)(de)雙(shuang)層(ceng)不(bu)(bu)銹(xiu)鋼絲中(zhong)間(jian)(jian)沒有交(jiao)接(jie)點。因此 不(bu)(bu)容(rong)易在承(cheng)擔(dan)氣體壓(ya)力時同于不(bu)(bu)銹(xiu)鋼絲間(jian)(jian)的(de)(de)交(jiao)叉式彎折(zhe)而產生應力或磨擦磨壞(huai)。故使(shi)用(yong)性能(neng)好,能(neng)承(cheng)擔(dan)髙壓(ya)。
3)高壓膠(jiao)管(guan)的外膠(jiao)層(ceng)(ceng)粘在提高層(ceng)(ceng)上(shang)起維護功(gong)效,一(yi)般選用氯丁膠(jiao)。應留意避免(mian) 其脆(cui)化開裂而危害全部橡膠(jiao)軟(ruan)管(guan)的使用壽(shou)命。