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高壓鋼絲纏繞膠管用于輸送具有y定壓力和溫度的石油基(如礦物油、可溶性油、液壓油、燃油和潤滑油)和水基液體(如乳液、油水乳液和水)以及液體輸送管道。用于礦山液壓支架、油田開(kāi)發(fā)、工程建設、起重運輸、冶金鍛造、礦山設備、船舶、注塑機械、農業(yè)機械、各種機床以及各工業(yè)部門(mén)的機械化和自動(dòng)化液壓系統。
按生產(chǎn)工藝主要分為高壓鋼絲編織軟管和高壓鋼絲纏繞膠管。高壓鋼絲編織膠管的結構主要由耐液合成橡膠內膠層、中膠層、Ⅰ、Ⅱ、Ⅲ鋼絲編織層和耐候合成橡膠外膠層組成。高壓鋼絲纏繞膠管的結構主要由內膠層、中膠層、四層或四層以上交替纏繞鋼絲加固層和外膠層組成。內膠層能使輸送介質(zhì)承受壓力,保護鋼絲不受侵蝕。外層橡膠層可以保護鋼絲免受損壞是加固的骨架材料。高壓膠管的工作壓力一般可達7-32mpa,超高壓膠管的工作壓力大于32mpa。超高壓膠管一般采用鋼絲纏繞結構的膠管,很大工作耐壓可達70-120mpa。高壓鋼絲纏繞管(高壓油管)工作溫度:-40~120℃,高溫鋼絲編織軟管工作溫度:油-40-100℃,空氣-30-50℃,水乳劑+80℃以下。
根據上述高壓膠管的使用條件(溫度、壓力、使用介質(zhì)等),工程機械膠管的內膠層應為CR或EPDM,外膠層應為EPDM和/或CR;石油工業(yè)膠管內膠層采用NBR/PVC、FKM、FKM/CSM、NBR,外膠層采用NBR/PVC、FKM、FKM/CSM、FKM/Eco、NBR、Cr;其他行業(yè)液壓軟管的內膠層采用ACM、VMQ、FKM、AEM和EPDM,外膠層采用ACM、FKM、AEM和EPDM。作為軟管,橡膠軟管需要在y定的彎曲半徑內具有靈活性。內部橡膠層要求具有耐油性和中等耐腐蝕性。中間橡膠層起緩沖隔離作用,加強層起耐壓作用。外層橡膠層要求耐各種老化和y定的耐磨性。
Thermax中粒熱解炭黑N990是天然氣熱解制備的一種du特的大粒徑(低比表面積)低結構炭黑。Thermax炭黑不僅使橡膠制品具有良好的耐油性、耐熱性和耐化學(xué)性,而且使橡膠制品具有優(yōu)異的動(dòng)態(tài)性能。Thermax炭黑的大粒徑和低結構使橡膠及其制品具有低收縮變形、高回彈和低滯后電阻的特點(diǎn)。
高壓鋼絲纏繞膠管的內部采用炭黑橡膠層。其高填充特性可降低橡膠的成本,提高耐油性和耐介質(zhì)腐蝕性,提高橡膠在中間橡膠層中的動(dòng)態(tài)性能,承受更多的壓力脈沖,并改善橡膠層與加強層(鋼絲等)之間的粘合性,可滿(mǎn)足炭黑等抗老化方法的抗老化要求。
高壓鋼絲纏繞膠管的橡膠硬度高,可達到70肖氏度以上。如何避免在加工和擠壓過(guò)程中產(chǎn)生熱量和燒焦是一個(gè)非常重要的問(wèn)題。在橡膠加工中使用超過(guò)y定量的工作油或化學(xué)添加劑來(lái)提高加工性能,不僅會(huì )對環(huán)境產(chǎn)生影響,還會(huì )大大降低橡膠軟管產(chǎn)品的后期性能。
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陰陽(yáng)趙鎮李莊村