1、橡膠軟管總成
1)高(gao)壓膠(jiao)管(guan)由內(nei)(nei)(nei)膠(jiao)層、提高(gao)層和(he)外(wai)膠(jiao)層構成(如圖例),內(nei)(nei)(nei)膠(jiao)層立即與液(ye)壓油觸碰,故規定在(zai)長期(qi)性(xing)(xing)(xing)(xing)運行狀態下(xia)不(bu)(bu)可受液(ye)體浸蝕,能(neng)補漏。在(zai)提高(gao)層功效下(xia)會(hui)(hui)承擔一(yi)(yi)定工(gong)作壓力。因(yin)而(er),宜(yi)選用丁腈橡(xiang)膠(jiao),除塑(su)膠(jiao)粒外(wai),危(wei)害性(xing)(xing)(xing)(xing)能(neng)的(de)關鍵要(yao)(yao)素(su)也有(you)內(nei)(nei)(nei)膠(jiao)層的(de)強度、薄厚(hou)和(he)永久性(xing)(xing)(xing)(xing)形(xing)(xing)變(bian)(bian)(bian)量(liang)。強度和(he)永久性(xing)(xing)(xing)(xing)形(xing)(xing)變(bian)(bian)(bian)量(liang)對密(mi)封(feng)性(xing)(xing)(xing)(xing)性(xing)(xing)(xing)(xing)能(neng)危(wei)害非常大。一(yi)(yi)般(ban)強度高(gao)、縮(suo)小后的(de)永久性(xing)(xing)(xing)(xing)形(xing)(xing)變(bian)(bian)(bian)量(liang)小,密(mi)封(feng)性(xing)(xing)(xing)(xing)性(xing)(xing)(xing)(xing)能(neng)則越好。一(yi)(yi)般(ban)是(shi)在(zai)70~85邵(shao)氏硬(ying)度,縮(suo)小永久性(xing)(xing)(xing)(xing)形(xing)(xing)變(bian)(bian)(bian)50%時。內(nei)(nei)(nei)膠(jiao)層薄厚(hou)建議是(shi)為1.5~2.5mm,太厚(hou)會(hui)(hui)在(zai)壓扣(kou)時提升其流(liu)動率,導致不(bu)(bu)必要(yao)(yao)的(de)膠(jiao)在(zai)接頭芯套與橡(xiang)膠(jiao)軟(ruan)管(guan)的(de)觸碰內(nei)(nei)(nei)孔內(nei)(nei)(nei)沉積,減少商品(pin)(pin)流(liu)通橫截面;過(guo)薄會(hui)(hui)在(zai)壓扣(kou)時被(bei)壓裂(lie)。另(ling)外(wai)內(nei)(nei)(nei)膠(jiao)層壁厚(hou)勻稱性(xing)(xing)(xing)(xing)也很重要(yao)(yao)。假如薄厚(hou)不(bu)(bu)勻,縮(suo)小后會(hui)(hui)導致一(yi)(yi)面裂(lie)斷(duan)、一(yi)(yi)面堆膠(jiao)。內(nei)(nei)(nei)膠(jiao)層表層出現的(de)浮銹(xiu)也是(shi)危(wei)害性(xing)(xing)(xing)(xing)能(neng)品(pin)(pin)質的(de)關鍵要(yao)(yao)素(su)。
2)高壓(ya)(ya)膠管(guan)(guan)關鍵借助提高層(ceng)來承(cheng)(cheng)受力。手(shou)工編織(zhi)橡膠軟管(guan)(guan)是靠膠漿與(yu)內外黏膠粘緊(jin),因(yin)為(wei)同一(yi)手(shou)工編織(zhi)層(ceng)內不(bu)(bu)(bu)(bu)銹(xiu)鋼(gang)(gang)(gang)絲(si)中(zhong)(zhong)間的(de)(de)互相觸碰,在(zai)承(cheng)(cheng)擔氣體壓(ya)(ya)力的(de)(de)時(shi)候會(hui)因(yin)分別伸(shen)縮式不(bu)(bu)(bu)(bu)一(yi)而(er)導致不(bu)(bu)(bu)(bu)銹(xiu)鋼(gang)(gang)(gang)絲(si)彼(bi)此(ci)之間的(de)(de)摩擦而(er)危(wei)害其使(shi)用性能(neng)。而(er)螺旋波紋管(guan)(guan)是由盤繞方位不(bu)(bu)(bu)(bu)一(yi)樣(yang)的(de)(de)雙層(ceng)產(chan)生(sheng)一(yi)個工作中(zhong)(zhong)層(ceng),在(zai)雙層(ceng)中(zhong)(zhong)間有正中(zhong)(zhong)間膠,因(yin)而(er)同一(yi)工作中(zhong)(zhong)層(ceng)的(de)(de)雙層(ceng)不(bu)(bu)(bu)(bu)銹(xiu)鋼(gang)(gang)(gang)絲(si)中(zhong)(zhong)間沒(mei)有交接點。因(yin)此(ci) 不(bu)(bu)(bu)(bu)容易在(zai)承(cheng)(cheng)擔氣體壓(ya)(ya)力時(shi)同于不(bu)(bu)(bu)(bu)銹(xiu)鋼(gang)(gang)(gang)絲(si)間的(de)(de)交叉(cha)式彎折而(er)產(chan)生(sheng)應力或磨擦磨壞。故使(shi)用性能(neng)好,能(neng)承(cheng)(cheng)擔髙壓(ya)(ya)。
3)高(gao)壓膠管的(de)(de)外膠層粘在提高(gao)層上起維護功效,一般選用(yong)氯丁膠。應(ying)留(liu)意避免 其脆化開(kai)裂而(er)危害全部橡膠軟管的(de)(de)使用(yong)壽命。