高壓膠管接頭總成(cheng)構(gou)造和性能的(de)關聯

１、橡膠軟管總成

1）高壓(ya)膠(jiao)(jiao)(jiao)(jiao)管(guan)由內膠(jiao)(jiao)(jiao)(jiao)層(ceng)(ceng)(ceng)(ceng)(ceng)、提(ti)高層(ceng)(ceng)(ceng)(ceng)(ceng)和(he)外膠(jiao)(jiao)(jiao)(jiao)層(ceng)(ceng)(ceng)(ceng)(ceng)構(gou)成（如圖例），內膠(jiao)(jiao)(jiao)(jiao)層(ceng)(ceng)(ceng)(ceng)(ceng)立即與(yu)液壓(ya)油觸碰，故規(gui)定(ding)在(zai)長期性(xing)(xing)運行狀態下(xia)不可受液體浸蝕，能(neng)補漏(lou)。在(zai)提(ti)高層(ceng)(ceng)(ceng)(ceng)(ceng)功效下(xia)會(hui)承擔一(yi)定(ding)工作(zuo)壓(ya)力。因而，宜選用(yong)丁(ding)腈橡(xiang)膠(jiao)(jiao)(jiao)(jiao)，除塑膠(jiao)(jiao)(jiao)(jiao)粒外，危害性(xing)(xing)能(neng)的(de)關鍵要(yao)素(su)也(ye)有內膠(jiao)(jiao)(jiao)(jiao)層(ceng)(ceng)(ceng)(ceng)(ceng)的(de)強度、薄(bo)厚和(he)永(yong)(yong)久(jiu)性(xing)(xing)形變量。強度和(he)永(yong)(yong)久(jiu)性(xing)(xing)形變量對密封(feng)性(xing)(xing)性(xing)(xing)能(neng)危害非常大。一(yi)般強度高、縮(suo)小(xiao)后(hou)的(de)永(yong)(yong)久(jiu)性(xing)(xing)形變量小(xiao)，密封(feng)性(xing)(xing)性(xing)(xing)能(neng)則越好(hao)。一(yi)般是(shi)在(zai)７０～８５邵氏硬度，縮(suo)小(xiao)永(yong)(yong)久(jiu)性(xing)(xing)形變５０％時(shi)(shi)。內膠(jiao)(jiao)(jiao)(jiao)層(ceng)(ceng)(ceng)(ceng)(ceng)薄(bo)厚建議是(shi)為１．５～２．５ｍｍ，太厚會(hui)在(zai)壓(ya)扣(kou)時(shi)(shi)提(ti)升(sheng)其流動率，導致不必(bi)要(yao)的(de)膠(jiao)(jiao)(jiao)(jiao)在(zai)接(jie)頭(tou)芯套(tao)與(yu)橡(xiang)膠(jiao)(jiao)(jiao)(jiao)軟管(guan)的(de)觸碰內孔內沉積，減少商(shang)品(pin)流通橫截面；過(guo)薄(bo)會(hui)在(zai)壓(ya)扣(kou)時(shi)(shi)被壓(ya)裂。另外內膠(jiao)(jiao)(jiao)(jiao)層(ceng)(ceng)(ceng)(ceng)(ceng)壁(bi)厚勻稱性(xing)(xing)也(ye)很重要(yao)。假(jia)如薄(bo)厚不勻，縮(suo)小(xiao)后(hou)會(hui)導致一(yi)面裂斷、一(yi)面堆(dui)膠(jiao)(jiao)(jiao)(jiao)。內膠(jiao)(jiao)(jiao)(jiao)層(ceng)(ceng)(ceng)(ceng)(ceng)表(biao)層(ceng)(ceng)(ceng)(ceng)(ceng)出現的(de)浮銹也(ye)是(shi)危害性(xing)(xing)能(neng)品(pin)質(zhi)的(de)關鍵要(yao)素(su)。

２）高(gao)壓(ya)膠(jiao)管關(guan)鍵借助提高(gao)層(ceng)來承(cheng)受力(li)(li)。手(shou)工(gong)編織橡膠(jiao)軟管是靠膠(jiao)漿與內外黏膠(jiao)粘緊，因為(wei)同一(yi)手(shou)工(gong)編織層(ceng)內不(bu)銹鋼絲中(zhong)(zhong)(zhong)間(jian)(jian)的(de)(de)互相觸(chu)碰，在(zai)承(cheng)擔氣體壓(ya)力(li)(li)的(de)(de)時(shi)候會(hui)因分別伸(shen)縮式不(bu)一(yi)而導致不(bu)銹鋼絲彼此之(zhi)間(jian)(jian)的(de)(de)摩(mo)擦而危害其使用性能(neng)(neng)(neng)。而螺旋波紋管是由盤繞方位不(bu)一(yi)樣的(de)(de)雙(shuang)層(ceng)產生一(yi)個工(gong)作中(zhong)(zhong)(zhong)層(ceng)，在(zai)雙(shuang)層(ceng)中(zhong)(zhong)(zhong)間(jian)(jian)有正中(zhong)(zhong)(zhong)間(jian)(jian)膠(jiao)，因而同一(yi)工(gong)作中(zhong)(zhong)(zhong)層(ceng)的(de)(de)雙(shuang)層(ceng)不(bu)銹鋼絲中(zhong)(zhong)(zhong)間(jian)(jian)沒有交(jiao)接點。因此 不(bu)容易在(zai)承(cheng)擔氣體壓(ya)力(li)(li)時(shi)同于不(bu)銹鋼絲間(jian)(jian)的(de)(de)交(jiao)叉式彎折(zhe)而產生應(ying)力(li)(li)或磨擦磨壞。故(gu)使用性能(neng)(neng)(neng)好，能(neng)(neng)(neng)承(cheng)擔髙壓(ya)。

３）高壓膠管(guan)的外膠層粘在提(ti)高層上(shang)起維護(hu)功效，一般(ban)選用氯丁膠。應留意避免(mian) 其脆化開裂而(er)危害全部橡膠軟管(guan)的使用壽命。