CN109357108B - 一种柔性特种复合防热套及其制作方法 - Google Patents
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Abstract
本发明提供了一种柔性特种复合防热套,包括由第一硅橡胶涂覆织物制成防热套的底层,所述第一硅橡胶涂覆织物的外表面涂刷有连续的气凝胶低导热涂料层,所述气凝胶低导热涂料层外涂刷有连续的相变储能涂料层,所述相变储能涂料层外粘贴有第一有机硅玻璃纤维胶带,所述第一有机硅玻璃纤维胶带外包覆有第二硅橡胶涂覆织物,所述第二硅橡胶涂覆织物的外表面涂刷有连续的耐高温隔热阻燃涂料层,所述耐高温隔热阻燃涂料层外粘贴有第二有机硅玻璃纤维胶带,所述第二有机硅玻璃纤维胶带外贴附有铝箔复合防热布。本发明同时提供了上述防热套的制作方法。这种防热套安装方便、成型配合性好、防护效果稳定。
Description
技术领域
本发明涉及一种航天用仪器、仪表、电连接器、设备的热防护材料,具体涉及一种当航天航空器处于长时高辐射热流技术条件下,用于保障飞行器内仪器、仪表设备维持在一定温度内的防热套及其制作方法。
背景技术
新型动力系统和再入式飞行器、临近空间飞行器、空间探测飞行器等飞行器的热防护系统所用的热防护材料是设计研制的关键材料。热防护材料对于飞行器的遥测控制系统尤其重要,其防护效果直接关系到飞行器的飞行精度、飞行姿态等。
随着大推力运载火箭的研制及发展,超音速飞行器的不断深入研究,对遥测控制系统所需的防热材料提出更高要求。
飞行器在飞行过程中,用于飞行器舱体内的仪器、仪表设备的热防护材料处于一种矛盾状态:既要防护外界温度对仪器、仪表设备的热传递,同时又要保障仪器、仪表设备因自身工作产生的热量得以快速散发,防止热量聚集导致热防护材料失效。再者,舱体内空间相对狭小,内置的仪器、仪表设备形状各异,对热防护材料要求柔性轻质、无多余物、易于安装。
现有的陶瓷基热防护材料具有质硬、耐气流冲刷、阻燃、耐高温等优点,但导热系数高、隔热性能不佳,易传递热量。对于舱体内的仪器、仪表设备而言,所需的热防护材料必须还要兼顾防热、隔热的功效。
发明内容
本发明要解决的技术问题是提供一种既能防热又能储热的柔性特种复合防热套及其制作方法。
为解决上述技术问题,本发明关于柔性特种复合防热套的技术方案是:一种柔性特种复合防热套,包括由第一硅橡胶涂覆织物制成防热套的底层,所述第一硅橡胶涂覆织物的外表面涂刷有连续的气凝胶低导热涂料层,所述气凝胶低导热涂料层外涂刷有连续的相变储能涂料层,所述相变储能涂料层外粘贴有第一有机硅玻璃纤维胶带,所述第一有机硅玻璃纤维胶带外包覆有第二硅橡胶涂覆织物,所述第二硅橡胶涂覆织物的外表面涂刷有连续的耐高温隔热阻燃涂料层,所述耐高温隔热阻燃涂料层外粘贴有第二有机硅玻璃纤维胶带,所述第二有机硅玻璃纤维胶带外贴附有铝箔复合防热布。
优选地,所述第一硅橡胶涂覆织物和第二硅橡胶涂覆织物的厚度均为0.2~0.3mm,所述气凝胶低导热涂料层的厚度为0.1~0.3mm,所述相变储能涂料层的厚度为0.2~0.4mm,所述耐高温隔热阻燃涂料层的厚度为0.6~1.0mm。
进一步地,所述防热套上设有止裂孔和穿绳孔,所述穿绳孔中贯穿有不锈钢玻璃纤维绳。
进一步地,所述防热套上设有空心铆钉。
本发明关于上述柔性特种复合防热套的制作方法包括以下工艺步骤:
①根据模具用第一硅橡胶涂覆织物制作防热套的底层;
②在第一硅橡胶涂覆织物的外表面涂刷气凝胶低导热涂料,待其固化后形成连续的气凝胶低导热涂料层;
③在气凝胶低导热涂料层外涂刷相变储能涂料,待其固化后形成连续的相变储能涂料层;
④在相变储能涂料层外粘贴第一有机硅玻璃纤维胶带;
⑤在第一有机硅玻璃纤维胶带外包覆第二硅橡胶涂覆织物;
⑥在第二硅橡胶涂覆织物的外表面涂刷耐高温隔热阻燃涂料,待其固化后形成连续的耐高温隔热阻燃涂料层;
⑦在耐高温隔热阻燃涂料层外粘贴第二有机硅玻璃纤维胶带;
⑧在第二有机硅玻璃纤维胶带外贴附铝箔复合防热布;
⑨依据图纸在防热套规定部位冲止裂孔和穿绳孔、装配铆钉、开缝。
在一个实施例中,所述气凝胶低导热涂料由加成型液体硅橡胶和二氧化硅气凝胶粉按质量比60~80:1~5的比例混合而成;所述相变储能涂料由加成型液体硅橡胶和相变温度为180~190℃的有机固-固相变材料按质量比3:2比例混合而成;所述耐高温隔热阻燃涂料由加成型液体硅橡胶、硼酸锌、二氧化硅气凝胶粉、玻璃粉、陶瓷粉、氢氧化铝、轻质氧化镁、云母粉按质量比80~120:4:3:10~14:10~14:2:2:3的比例混合而成。
优选地,所述步骤②、③、⑥中的涂刷方法相同,都是采用棕毛刷涂刷涂料,每次涂刷涂料约增厚0.03~0.06mm,涂刷完毕后,将产品置于温度为20~30℃、相对湿度低于65%的房间内自然晾干,时间为10~15分钟,再将自然晾干的产品置于120℃电加热箱中烘烤40~60分钟,使涂层完全固化,然后进行下一次的涂刷和固化。
采用本发明制作方法生产出来的柔性特种复合防热套,安装方便、成型配合性好、防护效果稳定,在工作环境为以下给定的热流条件一和热流条件二时,能够保证防热套内的仪器、仪表表面温度始终低于60℃。
热流条件一
热流条件二
附图说明
图1为本发明柔性特种复合防热套的结构示意图;
附图标记为:
1——第一硅橡胶涂覆织物、2——气凝胶低导热涂料层、3——相变储能涂料层、4——第一有机硅玻璃纤维胶带、5——第二硅橡胶涂覆织物、6——耐高温隔热阻燃涂料层、7——第二有机硅玻璃纤维胶带、8——模具。
具体实施方式
如图1所示,本发明关于柔性特种复合防热套的优选实施例是:一种柔性特种复合防热套,包括由第一硅橡胶涂覆织物1制成防热套的底层包裹在模具8上,所述第一硅橡胶涂覆织物1的外表面涂刷有连续的气凝胶低导热涂料层2,所述气凝胶低导热涂料层2外涂刷有连续的相变储能涂料层3,所述相变储能涂料层3外粘贴有第一有机硅玻璃纤维胶带4,所述第一有机硅玻璃纤维胶带4外包覆有第二硅橡胶涂覆织物5,所述第二硅橡胶涂覆织物5的外表面涂刷有连续的耐高温隔热阻燃涂料层6,所述耐高温隔热阻燃涂料层外粘贴有第二有机硅玻璃纤维胶带7,所述第二有机硅玻璃纤维胶带外贴附有铝箔复合防热布8;所述防热套上设有止裂孔、穿绳孔、空心铆钉,所述穿绳孔中贯穿有不锈钢玻璃纤维绳。
其中,第一硅橡胶涂覆织物1和第二硅橡胶涂覆织物5的厚度均为0.2~0.3mm,气凝胶低导热涂料层2的厚度为0.1~0.3mm,相变储能涂料层3的厚度为0.2~0.4mm,耐高温隔热阻燃涂料层6的厚度为0.6~1.0mm。
本发明关于柔性特种复合防热套的制作方法包括以下工艺步骤:
(1)制作模具
由客户设计部门提供需防护的仪器、仪表、设备的尺寸图纸,根据图纸加工模具;
(2)硅橡胶涂覆织物按模具展开图裁剪
按模具展开图裁剪硅橡胶涂覆织物,选择最优方案,控制多余物的产生;
(3)搭接处涂刷加成型液体硅橡胶
将加成型液体硅橡胶涂刷在硅橡胶涂覆织物的搭接处,搭接处距边距15mm;
(4)在模具上包覆成型
将硅橡胶涂覆织物在模具上包覆好,形成防热套的底层,用透明胶和图钉固定,形成第一硅橡胶涂覆织物;
(5)拆除紧固装置
经24小时室温处置或120℃高温烘烤1h后,拆除用于固定的透明胶带和图钉;
(6)配制气凝胶低导热涂料
将加成型液体硅橡胶和二氧化硅气凝胶粉按质量比60~80:1~5的比例进行混合,得到气凝胶低导热涂料;
(7)刷涂气凝胶低导热涂料
人工用棕毛刷在硅橡胶涂覆织物上涂刷涂料,确保无流痕,每次涂刷涂料约增厚0.03-0.06mm;
(8)晾干
涂刷完毕后,将产品置于25±5℃,相对湿度低于65%的房间内自然晾干,一般时间为10-15min;
(9)烘烤固化
将自然晾干的产品置于120℃电加热箱中烘烤40-60min;将步骤(7)-(9)重复多次,使气凝胶低导热涂料层的厚度达到0.1~0.3mm;
(10)配制相变储能涂料
将加成型液体硅橡胶和相变温度为180~190℃的有机固-固相变材料按质量比3:2比例进行混合,得到相变储能涂料;
(11)刷涂相变储能涂料
人工用棕毛刷涂刷涂料,确保无流痕,每次涂刷涂料约增厚0.03-0.06mm;
(12)晾干
涂刷完毕后,将产品置于25±5℃,相对湿度低于65%的房间内自然晾干,一般时间为10-15min;
(13)烘烤固化
将自然晾干的产品置于120℃电加热箱中烘烤40-60min;将步骤(11)-(13)重复多次,使相变储能涂料层(3)的厚度达到0.2~0.4mm;
(14)贴附有机硅玻璃纤维布胶带
将有机硅玻璃纤维布胶带按成型的防热套剪裁,贴敷在产品上,形成第一有机硅玻璃纤维布胶带;
(15)再次裁剪硅橡胶涂覆织物
在上述基础上再次裁剪硅橡胶涂覆织物,按成型的防热套所需的尺寸裁剪;
(16)涂刷液体硅橡胶
将液体硅橡胶涂刷在第二硅橡胶涂覆织物的搭接处,搭接处距边距15mm;
(17)在成型的防热套上包覆成型
裁剪的试样在成型的防热套上包覆好后,用透明胶带和图钉固定,形成第二硅橡胶涂覆织物;
(18)拆除紧固装置
经24小时室温处置或120℃烘烤1h后,拆除用于固定的透明胶带和图钉;
(19)配制耐高温隔热阻燃涂料
将加成型液体硅橡胶、硼酸锌、二氧化硅气凝胶粉、玻璃粉、陶瓷粉、氢氧化铝、轻质氧化镁、云母粉按质量比80~120:4:3:10~14:10~14:2:2:3的比例进行混合,得到耐高温隔热阻燃涂料;
(20)刷涂耐高温隔热阻燃涂料
人工用棕毛刷涂刷涂料,确保无流痕,每次涂刷涂料约增厚0.03-0.06mm;
(21)晾干
涂刷完毕后,将产品置于25±5℃,相对湿度低于65%的房间内自然晾干,一般时间为10-15min;
(22)烘烤固化
将自然晾干的产品置于120℃电加热箱中烘烤40-60min;将步骤(20)-(22)重复多次,使耐高温隔热阻燃涂料层厚度达到0.6~1.0mm;
(23)贴附有机硅玻璃纤维布胶带
将有机硅玻璃纤维布胶带按成型的防热套剪裁,贴敷在产品上,形成第二有机硅玻璃纤维布胶带;
(24)画线、裁多余物、打孔、打铆、开缝
依据图纸要求画线、裁剪至规定尺寸,依据图纸在规定部位冲止裂孔和穿绳孔、装配铆钉、开缝;
(25)粘贴铝箔复合防热布
将铝箔复合防热布按成型的防热套剪裁,贴敷在产品上;
(26)配系不锈钢玻璃纤维绳或铆接
按图纸要求用不锈钢玻璃纤维绳贯穿穿绳孔,多余部位捆绑成团(安装时解开),采用螺杆穿过空心铆钉,用螺母固定。
上述实施例为本发明较佳的实现方案,除此之外,本发明还可以其它方式实现,在不脱离本技术方案构思的前提下任何显而易见的替换均在本发明的保护范围之内。
为了让本领域普通技术人员更方便地理解本发明相对于现有技术的改进之处,本发明的一些附图和描述已经被简化,并且为了清楚起见,本申请文件还省略了一些其它元素,本领域普通技术人员应该意识到这些省略的元素也可构成本发明的内容。
Claims (6)
1.一种柔性特种复合防热套,其特征在于:包括由第一硅橡胶涂覆织物(1)制成防热套的底层,所述第一硅橡胶涂覆织物(1)的外表面涂刷有连续的气凝胶低导热涂料层(2),所述气凝胶低导热涂料层(2)外涂刷有连续的相变储能涂料层(3),所述相变储能涂料层(3)外粘贴有第一有机硅玻璃纤维胶带(4),所述第一有机硅玻璃纤维胶带(4)外包覆有第二硅橡胶涂覆织物(5),所述第二硅橡胶涂覆织物(5)的外表面涂刷有连续的耐高温隔热阻燃涂料层(6),所述耐高温隔热阻燃涂料层(6)外粘贴有第二有机硅玻璃纤维胶带(7),所述第二有机硅玻璃纤维胶带(7)外贴附有铝箔复合防热布(8);所述气凝胶低导热涂料由加成型液体硅橡胶和二氧化硅气凝胶粉按质量比60~80:1~5的比例混合而成;所述相变储能涂料由加成型液体硅橡胶和相变温度为180~190℃的有机固-固相变材料按质量比3:2比例混合而成;所述耐高温隔热阻燃涂料由加成型液体硅橡胶、硼酸锌、二氧化硅气凝胶粉、玻璃粉、陶瓷粉、氢氧化铝、轻质氧化镁、云母粉按质量比80~120:4:3:10~14:10~14:2:2:3的比例混合而成。
2.根据权利要求1所述的柔性特种复合防热套,其特征在于:所述第一硅橡胶涂覆织物(1)和第二硅橡胶涂覆织物(5)的厚度均为0.2~0.3mm,所述气凝胶低导热涂料层(2)的厚度为0.1~0.3mm,所述相变储能涂料层(3)的厚度为0.2~0.4mm,所述耐高温隔热阻燃涂料层(6)的厚度为0.6~1.0mm。
3.根据权利要求1或2所述的柔性特种复合防热套,其特征在于:所述防热套上设有止裂孔和穿绳孔,所述穿绳孔中贯穿有不锈钢玻璃纤维绳。
4.根据权利要求1或2所述的柔性特种复合防热套,其特征在于:所述防热套上设有空心铆钉。
5.一种柔性特种复合防热套的制作方法,其特征在于包括以下工艺步骤:①根据模具用第一硅橡胶涂覆织物制作防热套的底层;②在第一硅橡胶涂覆织物的外表面涂刷气凝胶低导热涂料,待其固化后形成连续的气凝胶低导热涂料层;③在气凝胶低导热涂料层外涂刷相变储能涂料,待其固化后形成连续的相变储能涂料层;④在相变储能涂料层外粘贴第一有机硅玻璃纤维胶带;⑤在第一有机硅玻璃纤维胶带外包覆第二硅橡胶涂覆织物;⑥在第二硅橡胶涂覆织物的外表面涂刷耐高温隔热阻燃涂料,待其固化后形成连续的耐高温隔热阻燃涂料层;⑦在耐高温隔热阻燃涂料层外粘贴第二有机硅玻璃纤维胶带;⑧在第二有机硅玻璃纤维胶带外贴附铝箔复合防热布;⑨依据图纸在防热套规定部位冲止裂孔和穿绳孔、装配铆钉、开缝。
6.根据权利要求5所述的柔性特种复合防热套的制作方法,其特征在于:所述步骤②、③、⑥中的涂刷方法相同,都是采用棕毛刷涂刷涂料,每次涂刷涂料约增厚0 .03~0.06mm,涂刷完毕后,将产品置于温度为20~30℃、相对湿度低于65%的房间内自然晾干,时间为10~15分钟,再将自然晾干的产品置于120℃电加热箱中烘烤40~60分钟,使涂层完全固化,然后进行下一次的涂刷和固化。
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