CN110428929A - 一种机场充电用柔性温控电缆及其生产工艺 - Google Patents
一种机场充电用柔性温控电缆及其生产工艺 Download PDFInfo
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Abstract
本发明公开了一种机场充电用柔性温控电缆及其生产工艺,包括组合缆芯;所述组合缆芯包括动力线芯、辅助线芯、控制线束和缆芯填充;所述动力线芯围绕轴心120°设置;相邻的动力线芯间设有辅助线芯;相邻的动力线芯及辅助线芯间设有控制线束;所述动力线芯包括组合导体及动力线芯绝缘层;所述组合导体由多束导体束和1束温控线芯分层绞合而成。本发明的电缆结构紧密,减少了电缆的集肤效应,增加电缆载流量,降低电缆发热,在组合导体中绞合了温控电缆,能够根据温度对电缆的电流进行调控,增加电缆输电效率,减少输电损耗,加快充电速度,降低电缆工作温度,延长电缆寿命。
Description
技术领域
本发明涉及电缆,尤其涉及一种机场充电用柔性温控电缆及其生产工艺。
背景技术
为了降低飞机的整体重量,提高飞机的内部空间,所采用的电气元件为400Hz交流电,飞机降落后需要对携带电池进行充电,保证正常的电力供应,充电时同样会采用400Hz交流电,在中频下由于集肤效应,会造成充电电缆的交流电阻变大,同时产生相对较大的磁场,降低了电缆的载流能力,电缆充电慢,发热严重,寿命短。
发明内容
本发明的目的是提供一种充电快,寿命长的机场充电用柔性温控电缆及其生产工艺。
实现本发明目的的第一个技术方案是:一种机场充电用柔性温控电缆,包括组合缆芯;所述组合缆芯包括动力线芯、辅助线芯、控制线束和缆芯填充;所述动力线芯围绕轴心120°设置;相邻的动力线芯间设有辅助线芯;相邻的动力线芯及辅助线芯间设有控制线束;所述动力线芯包括组合导体及动力线芯绝缘层;所述组合导体由多束导体束和1束温控线芯分层绞合而成;所述组合缆芯外依次包裹有无纺布绕包层,内护层、加强层、外护套和加强涂层。
所述动力线芯绝缘层采用聚丙乙烯绝缘材料,厚度为1-2mm。
所述内护层采用硬乙丙橡胶,厚度为0.8~1.2mm。
所述加强层采用芳纶编织网格带绕包而成,网格孔径0.5~1.5mm,宽度40~60mm,搭盖率15~20%。
所述外护套采用高性能氯丁混合橡皮外护套,厚度为2.5~3.5mm。
所述加强涂层采用聚偏氟乙烯材料,厚度为0.05~0.1mm。
所述组合导体由2124根导体均分为36份束绞成导体束后与1根温控线芯以1+6+12+18四层复绞而成,束绞节径比不大于20,复绞方向左向;所述温控线芯设置在动力线芯最外层,最外层绞合节径比不大于16;所述导体直径不大于0.2mm;相邻两层导体束间绕包有绝缘绕包层;所述绝缘绕包层包带绕包方向均为右向;所述组合导体外绕包有聚丙烯无纺布,绕包方向为右向。
所述温控线芯设置在组合导体最外层。
所述温控线芯外采用聚醚醚酮树脂制成温控线芯绝缘层。
所述辅助线芯包括辅助线芯导体和辅助线芯绝缘层。
所述控制线束包括四根绞合的控制线芯,所述控制线束外包裹有控制线束屏蔽层。
所述控制线芯外包裹有控制线芯绝缘层;所述控制线芯为镀锡铜丝采用1+6+12结构绞合而成,绞合节径比不大于20;所述控制线芯绝缘层材料为辐照聚烯烃,厚度为0.25~0.40mm。
控制线芯绝缘层辐照,能量1.4MeV,束下道数35,剂量设定10m/min/mA,辐照后绝缘抗拉强度≥25Mpa,断裂伸长率≥200%,负载下的热延伸≤35%控制电缆生产完成后需经过火花机检验绝缘完成性,不能击穿
所述动力线芯和辅助线芯表面涂覆有润滑剂;所述组合缆芯间的空隙中设有缆芯填充;在组合缆芯外采用聚酯加强型无纺布绕包无纺布绕包层;所述缆芯填充为麻绳或棉纱线。
本发明的第二个技术方案是:一种机场充电用柔性温控电缆的生产工艺,用于生产上述的一种机场充电用柔性温控电缆,包括以下步骤:
S1:制备动力线芯、辅助线芯和控制线束;
S2:将动力线芯、辅助线芯和控制线束组合,添加缆芯填充,成缆为组合缆芯,在成缆的组合缆芯外绕包无纺布绕包层;
S3:在无纺布绕包层外挤出内护层;在内护层外绕包加强层;在加强层外挤出外护套;在外护套外喷涂加强涂层。
所述S1步骤中,动力线芯绝缘层采用橡胶挤出工艺挤出,挤出参数为:机头温度90~100℃,机身温度100~110℃,蒸汽温度160~180℃,蒸汽压力7~8bar,生产速度7~8m/min。
所述辅助线芯绝缘层采用橡胶挤出工艺挤出,挤出参数为:机头温度90~100℃,机身温度100~110℃,蒸汽温度160~180℃,蒸汽压力7~8bar,生产速度7~8m/min。
所述控制线芯绞合后采用纳米模具紧压,紧压系数为95%,紧压外径1.3mm;在控制线芯外采用辐照型聚烯烃挤出控制线芯绝缘层。
所述控制线芯绝缘层采用橡胶挤出工艺挤出,挤出参数为:预热到95~110℃,挤出温度160~205℃,挤出速度200m/min。
在所述温控线芯外施加电压,使微米级聚醚醚酮树脂吸附在温控线芯外,喷涂厚度为0.1~0.3mm;用火焰喷枪融化微米级聚醚醚酮树脂,冷却固化形成温控线芯绝缘层。
所述S2步骤中,在所述动力线芯和辅助线芯表面涂覆润滑剂;在所述组合缆芯间的空隙中填充缆芯填充;绞合成缆;在组合缆芯外采用聚酯加强型无纺布绕包无纺布绕包层。
所述内护层采用橡胶挤出工艺挤出,挤出参数为:厚度为0.8~1.2mm,机头温度90~100℃,机身温度100~110℃,蒸汽温度160~180℃,蒸汽压力7~8bar,生产速度7~8m/min。
所述加强层为绕包芳纶编织网格带,网格孔径0.5~1.5mm,宽度40~60mm,搭盖率15~20%,所述加强层涂有热熔胶。
所述外护套采用挤压式生产,控制厚度在2.5~3.5mm,采用150挤橡机生产,机身温度为90℃~100℃,机头温度设定为80℃~90℃,硫化温度160~180℃,生产速度为7~8m/min,气压为7~8bar。
所述S3步骤中,所述加强涂层采用聚偏氟乙烯;将聚偏氟乙烯雾化,喷涂在外护套外;将喷涂了聚偏氟乙烯的外护套送入烘房固化,溶剂回收,在外护套外形成加强涂层。
采用了上述技术方案,本发明具有以下的有益效果:
(1)本发明的电缆结构紧密,动力线芯围绕轴心120°设置,辅助线芯和控制线束对称设置在动力线芯间的间隙中,减少了电缆的集肤效应,增加电缆载流量,降低电缆发热,在组合导体中绞合了温控电缆,能够根据温度对电缆的电流进行调控,增加电缆输电效率,减少输电损耗,加快充电速度,降低电缆工作温度,延长电缆寿命。
(2)本发明的组合导体采用导体束和温控线芯混合多层复绞,每层绕包绝缘绕包层,不仅增加了电缆的抗拉抗扭转性能,还增强了组合导体的绝缘性,在组合导体外绕包聚丙烯无纺布,增加了组合导体的圆整度,方便挤包绝缘层。
(3)本发明的温控线芯设置在组合导体最外层,能够在动力线芯温度和导体电缆整体温度感应中获得相应的平衡,防止动力线芯内部温度高于外部温度过多,导致温控线芯对电缆运行状态判断不准,从而影响电缆运行电流的调控,降低输电效率。
(4)本发明的控制线芯控制线束结构强度大,抗拉抗扭转,同时控制线束外包裹控制线束屏蔽层,具有很强的屏蔽性能,能够防止外部和电缆运行产生的磁场和错误信号影响控制线芯对电缆运行状态的调控。
(5)本发明的控制线芯采用镀锡铜丝多层绞合,同时采用绝缘耐热性能好的辐照聚烯烃作为绝缘层,进一步加强了控制线芯的结构强度和使用寿命。
(6)本发明的动力线芯和辅助线芯表面涂覆有润滑剂,方便绞合,使电缆结构更加紧密,组合缆芯间的空隙中设有缆芯填充,增加了电缆的抗拉抗扭转性能,在组合缆芯外采用聚酯加强型无纺布绕包无纺布绕包层增加乐组合缆芯的圆整度和紧密度,方便挤出内护层。
(7)本发明的生产工艺简单,方便,对环境影响小,生产出的电缆,结构稳定,耐热,耐腐蚀,耐酸碱性能好。
(8)本发明的温控线芯绝缘层采用静电吸附,火焰固化,生产的绝缘层结构致密,厚度均匀,表面光滑,绝缘性能好。
(9)本发明的控制线芯绞合后采用纳米模具紧压,能够去除表面毛刺,防止线芯被击穿,保证控制线芯使用的稳定性。
(10)本发明的加强涂层采用雾化聚偏氟乙烯,用烘房固化,生产的加强涂层结构致密,物理化学性能好,更耐磨耐腐蚀,同时烘房固化时,回收蒸发的溶剂,减少了环境污染和溶剂损耗,降低了生产成本。
附图说明
为了使本发明的内容更容易被清楚地理解,下面根据具体实施例并结合附图,对本发明作进一步详细的说明,其中
图1为本发明的电缆的截面示意图
附图中标号为:动力线芯1,动力线芯绝缘层1-1,导体束1-2,温控线芯1-3;
辅助线芯2,辅助线芯导体2-1,辅助线芯绝缘层2-2;
控制线束3,控制线芯3-1,控制线束屏蔽层3-2,控制线芯绝缘层3-3;
缆芯填充4,无纺布绕包层5,内护层6,加强层7,外护套8,加强涂层9。
具体实施方式
见图1,本实施例的机场充电用柔性温控电缆,包括组合缆芯。组合缆芯包括动力线芯1、辅助线芯2、控制线束3和缆芯填充4。动力线芯1围绕轴心120°设置。相邻的动力线芯1间设有辅助线芯2。相邻的动力线芯1及辅助线芯2间设有控制线束3。动力线芯1包括组合导体及动力线芯绝缘层1-1。组合导体由多束导体束1-2和1束温控线芯1-3分层绞合而成。组合缆芯外依次包裹有无纺布绕包层5,内护层6、加强层7、外护套8和加强涂层9。
为了加强电缆的屏蔽性能,动力线芯绝缘层1-1采用聚丙乙烯绝缘材料,抗拉强度≥9Mpa,断裂伸长率≥300Mpa,满足-40℃低温性能。
为了进一步加强电缆的抗拉抗扭转性能,增加电缆防水性,内护层6采用吸水性低的硬乙丙橡胶,厚度为0.8~1.2mm。
为了进一步增强电缆的抗拉抗扭转性能,加强层7采用芳纶编织网格带绕包而成,网格孔径0.5~1.5mm,宽度40~60mm,搭盖率15~20%。使内护层7和外护套8紧密结合在一起。合适的网格宽度有利于胶料的渗透,网格带的宽度在绕包时不容易起皱,又能有较高的绕包效率。
为了进一步加强电缆的抗拉抗扭转性能和使用寿命,外护套8采用高性能氯丁混合橡皮外护套,厚度为2.5~3.5mm,抗拉强度≥20Mpa,断裂伸长率≥300%,具有良好的物理机械性能、耐低温性能、弹性、耐油、耐燃和耐日光特性,良好的粘结等性能,合适的厚度,电缆避免包带印痕。
为了进一步加强电缆的使用寿命和耐酸碱性,加强涂层9采用聚偏氟乙烯材料,厚度为0.05~0.1mm,具有强度大、耐磨、耐高温、耐酸碱的特性,材料价格比较昂贵,但机械性能很好,较薄的厚度控制成本,同时保证产品性能。
为了进一步增强电缆的抗拉抗扭转性能,采用特殊的绞合方式,组合导体由2124根导体均分为36份束绞成导体束1-2后与1根温控线芯1-3以1+6+12+18四层复绞而成,束绞节径比不大于20,复绞方向左向。温控线芯1-3设置在动力线芯1最外层,最外层绞合节径比不大于16。导体直径不大于0.2mm。相邻两层导体束1-2间绕包有绝缘绕包层1-4。绝缘绕包层1-4包带绕包方向均为右向。组合导体外绕包有聚丙烯无纺布1-5,绕包方向为右向。
为了更准确感应电缆整体温度,温控线芯1-3设置在组合导体最外层,能够避免动力线芯1内温度较电缆其余部位温度高,而使电缆过早停止工作。
为了保护温控线芯1-3,使温控线芯1-3在高温下能够正常工作,温控线芯1-3外采用聚醚醚酮树脂制成温控线芯绝缘层,使用温度高,防止温控线芯1-3在使用过程中断芯。
辅助线芯2包括辅助线芯导体2-1和辅助线芯绝缘层2-2,辅助线芯绝缘层2-2采用硬乙丙橡胶,厚度0.8~1.2mm,抗拉强度≥9Mpa,断裂伸长率≥300Mpa,满足-40℃低温性能。辅助线芯2具有载流量补偿的作用,长时间充电时,当电缆使用的设备监控系统发现电缆载流偏低,或温度过高时,会让辅助线芯2提供10~30A左右的电流进行补偿给动力线芯1,进行载流的调整。
控制线束3具有调控输出电量稳定性,输出温度稳定性,电量反馈,电缆异常反馈等功能,可控制输出电流在±5A,控制电缆使用温度≤70℃,电量充满时反馈停止输出,电缆温度超过70℃进行提醒,超过90℃进行跳闸等。
为了增强控制线束3的工作稳定性,采用控制线束屏蔽层3-2防止电缆受到干扰,控制线束3包括四根绞合的控制线芯3-1,控制线束3外包裹有控制线束屏蔽层3-2,采用0.12mm铜丝,编织密度≥80%,编织角45~55%,防止传递信号时受到干扰,工作电容≤50nF/km,屏蔽抑制系数≤0.07,控制电缆传递信号,编织角控制在50%左右,不至于编织太松和太紧,安装接线比较容易。
为了进一步加强电缆的抗拉抗扭转性能和绝缘性能,控制线芯3-1外包裹有控制线芯绝缘层3-3。控制线芯3-1为镀锡铜丝采用1+6+12结构绞合而成,绞合节径比不大于20,张力不能大于20N,控制节径比和张力,保证电缆绞合结构稳定。控制线芯绝缘层3-3材料为辐照聚烯烃,厚度为0.25~0.40mm。
控制线芯绝缘层3-3辐照,辐照参数为:能量1.4MeV,束下道数35,剂量设定10m/min/mA。辐照后抗拉强度≥25Mpa,断裂伸长率≥200%,负载下的热延伸≤35%。控制线芯绝缘层3-3很薄,容易辐照过度,导致绝缘伸长率较低,需要对能量和剂量进行控制,采用高强度聚烯烃材料,适当增加电缆的硬度,能够有效解决断芯的问题。
为了进一步加强电缆的抗拉抗扭转性能,动力线芯1和辅助线芯2表面涂覆有润滑剂。组合缆芯间的空隙中设有缆芯填充4。在组合缆芯外采用聚酯加强型无纺布绕包无纺布绕包层5。缆芯填充4为麻绳或棉纱线。
一种机场充电用柔性温控电缆的生产工艺,用于生产上述的一种机场充电用柔性温控电缆,包括以下步骤:
S1:制备动力线芯1、辅助线芯2和控制线束3。
其中,动力线芯绝缘层1-1采用橡胶挤出工艺挤出,挤出参数为:控制机头温度90~100℃,机身温度100~110℃,蒸汽温度160~180℃,蒸汽压力7~8bar,生产速度7~8m/min,根据橡胶的挤出特性,将电缆机头温度适当提高,适合胶料的挤出。组合导体和绝缘绕包层1-4采用笼绞机一次绕包形成,降低人工和生产成本,提高生产效率。在温控线芯1-3外施加电压,使微米级聚醚醚酮树脂吸附在温控线芯1-3外,喷涂厚度为0.1~0.3mm。用火焰喷枪融化微米级聚醚醚酮树脂,冷却固化形成温控线芯绝缘层。
辅助线芯绝缘层2-2采用橡胶挤出工艺挤出,挤出参数为:控制机头温度90~100℃,机身温度100~110℃,蒸汽温度160~180℃,蒸汽压力7~8bar,生产速度7~8m/min。
为了保护控制线芯3-1。防止电击穿,控制线芯3-1绞合后采用纳米模具紧压,紧压系数为95%,紧压外径1.3mm,导体表面会有毛刺,经过适当紧压控制在0.95,能够刮掉表面的毛刺,同时电缆导体不至于太硬,防止把导体刮断。
在控制线芯3-1外采用辐照型聚烯烃挤出控制线芯绝缘层3-3。控制线芯绝缘层3-3的挤出:预热到95~110℃,挤出温度160~205℃,挤出速度200m/min。
S2:将动力线芯1、辅助线芯2和控制线束3组合,添加缆芯填充4,成缆为组合缆芯,在成缆的组合缆芯外绕包无纺布绕包层5。在动力线芯1和辅助线芯2表面涂覆润滑剂,方便绞合,使电缆结构更加紧密。在组合缆芯间的空隙中填充缆芯填充4,加强电缆的抗拉抗扭转性能。绞合成缆。在组合缆芯外采用聚酯加强型无纺布绕包无纺布绕包层5,增加组合缆芯紧密度和圆整度。
S3:在无纺布绕包层5外挤出内护层6。在内护层6外绕包加强层7。在加强层7外挤出外护套8。在外护套8外喷涂加强涂层9。
内护层6采用橡胶挤出工艺挤出,挤出参数为:控制厚度在0.8~1.2mm,机头温度90~100℃,机身温度100~110℃,蒸汽温度160~180℃,蒸汽压力7~8bar,生产速度7~8m/min。
为了加强电缆的紧密性,增强电缆寿命,加强层7为绕包芳纶编织网格带,网格孔径0.5~1.5mm,宽度40~60mm,搭盖率15~20%,加强层7涂有热熔胶,当温度超过100℃融化,在硫化过程中与内护层6和外护套8良好的粘结在一起。
外护套8采用挤压式生产,控制厚度在2.5~3.5mm,采用150挤橡机生产,机身温度为90℃~100℃,机头温度设定为80℃~90℃,硫化温度160~180℃,生产速度为7~8m/min,气压为7~8bar,根据氯丁和CPE的挤出特性,将机头温度适当降低,防止焦烧。
为了加强电缆的耐酸碱性能,减少对环境的污染,加强涂层9采用聚偏氟乙烯。将聚偏氟乙烯雾化,喷涂在外护套8外。将喷涂了聚偏氟乙烯的外护套8送入烘房固化,溶剂回收,在外护套8外形成加强涂层9。
以上所述的具体实施例,对本发明的目的、技术方案和有益效果进行了进一步详细说明,所应理解的是,以上所述仅为本发明的具体实施例而已,并不用于限制本发明,凡在本发明的精神和原则之内,所做的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
Claims (10)
1.一种机场充电用柔性温控电缆,其特征在于:包括组合缆芯;所述组合缆芯包括动力线芯(1)、辅助线芯(2)、控制线束(3)和缆芯填充(4);所述动力线芯(1)围绕轴心120°设置;相邻的动力线芯(1)间设有辅助线芯(2);相邻的动力线芯(1)及辅助线芯(2)间设有控制线束(3);所述动力线芯(1)包括组合导体及动力线芯绝缘层(1-1);所述组合导体由多束导体束(1-2)和1束温控线芯(1-3)分层绞合而成;所述组合缆芯外依次包裹有无纺布绕包层(5),内护层(6)、加强层(7)、外护套(8)和加强涂层(9)。
2.根据权利要求1所述的一种机场充电用柔性温控电缆,其特征在于:所述组合导体由2124根导体均分为36份束绞成导体束(1-2)后与1根温控线芯(1-3)以1+6+12+18四层复绞而成,束绞节径比不大于20,复绞方向左向;所述温控线芯(1-3)设置在动力线芯(1)最外层,最外层绞合节径比不大于16;所述导体直径不大于0.2mm;相邻两层导体束(1-2)间绕包有绝缘绕包层(1-4);所述组合导体外绕包有聚丙烯无纺布(1-5)。
3.根据权利要求1所述的一种机场充电用柔性温控电缆,其特征在于:所述温控线芯(1-3)设置在组合导体最外层。
4.根据权利要求1所述的一种机场充电用柔性温控电缆,其特征在于:所述控制线束(3)包括四根绞合的控制线芯(3-1),所述控制线束(3)外包裹有控制线束屏蔽层(3-2)。
5.根据权利要求4所述的一种机场充电用柔性温控电缆,其特征在于:所述控制线芯(3-1)外包裹有控制线芯绝缘层(3-3);所述控制线芯(3-1)为镀锡铜丝采用1+6+12结构绞合而成,绞合节径比不大于20;所述控制线芯绝缘层(3-3)材料为辐照聚烯烃,厚度为0.25~0.40mm。
6.根据权利要求1所述的一种机场充电用柔性温控电缆,其特征在于:所述动力线芯(1)和辅助线芯(2)表面涂覆有润滑剂;所述组合缆芯间的空隙中设有缆芯填充(4);在组合缆芯外采用聚酯加强型无纺布绕包无纺布绕包层(5)。
7.一种机场充电用柔性温控电缆的生产工艺,其特征在于包括以下步骤:
S1:制备动力线芯(1)、辅助线芯(2)和控制线束(3);其中动力线芯包括组合导体和挤包在组合导体外的动力线芯绝缘层(1-1);将多束导体束(1-2)和1束温控线芯(1-3)分层绞合而成组合导体。
S2:将动力线芯(1)、辅助线芯(2)和控制线束(3)组合,添加缆芯填充(4),成缆为组合缆芯,在成缆的组合缆芯外绕包无纺布绕包层(5);
S3:在无纺布绕包层(5)外挤出内护层(6);在内护层(6)外绕包加强层(7);在加强层(7)外挤出外护套(8);在外护套(8)外喷涂加强涂层(9)。
8.根据权利要求7所述的一种机场充电用柔性温控电缆的生产工艺,其特征在于:所述步骤S1中,在所述温控线芯(1-3)外施加电压,使微米级聚醚醚酮树脂吸附在温控线芯(1-3)外,喷涂厚度为0.1~0.3mm;用火焰喷枪融化微米级聚醚醚酮树脂,冷却固化制成温控线芯绝缘层。
9.根据权利要求7所述的一种机场充电用柔性温控电缆的生产工艺,其特征在于:所述步骤S1中,所述控制线束(3)包括控制线芯(3-1)和控制线束屏蔽层(3-2);将控制线芯(3-1)束绞,控制线芯(3-1)束绞后采用纳米模具紧压,紧压系数为95%,紧压外径1.3mm;在控制线芯(3-1)外采用辐照型聚烯烃挤出控制线芯绝缘层(3-3)。
10.根据权利要求7所述的一种机场充电用柔性温控电缆的生产工艺,其特征在于:所述步骤S3中,所述加强涂层(9)采用聚偏氟乙烯;将聚偏氟乙烯雾化,喷涂在外护套(8)外;将喷涂了聚偏氟乙烯的外护套(8)送入烘房固化,溶剂回收,在外护套(8)外形成加强涂层(9)。
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