CN106246315A - 发动机排气管隔热保温套及加工工艺 - Google Patents

发动机排气管隔热保温套及加工工艺 Download PDF

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CN106246315A
CN106246315A CN201610872431.6A CN201610872431A CN106246315A CN 106246315 A CN106246315 A CN 106246315A CN 201610872431 A CN201610872431 A CN 201610872431A CN 106246315 A CN106246315 A CN 106246315A
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heat
insulation
insulating layer
thermal insulating
exhaust pipe
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余海
张远坤
张和贵
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Chongqing 321 Insulating Product Co Ltd
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Chongqing 321 Insulating Product Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/028—Net structure, e.g. spaced apart filaments bonded at the crossing points
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/08—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer the fibres or filaments of a layer being of different substances, e.g. conjugate fibres, mixture of different fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/05—Interconnection of layers the layers not being connected over the whole surface, e.g. discontinuous connection or patterned connection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/14—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having thermal insulation
    • F01N13/148—Multiple layers of insulating material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/16—Selection of particular materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/106—Carbon fibres, e.g. graphite fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/14—Mixture of at least two fibres made of different materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/304—Insulating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2510/00—Surface coverings
    • F01N2510/02—Surface coverings for thermal insulation

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
  • Thermal Insulation (AREA)

Abstract

一种发动机排气管隔热保温套以及加工方法，包括隔热本体和紧固装置；所述隔热本体包括直管部分和弯头部分且为多层结构，包括中间隔热层、内保温层、内防护网和外保温层。采用纳米二氧化硅气凝胶毡等纳米微孔绝热材料作为中间隔热层，导热系数低，隔热效果好，贴合式柔性弧面设计与管道更贴合切断热量流失的空间，增加了套内层表面与管外壁的有效接触面积，减少噪音及震动，避免了发动机运行时因壳壁与套内层空隙所造成的共振；分段式缝合设计解决了普通缝纫难以加工的问题，节省缝纫时间，提高了生产及安装效率，降低了生产成本。

Description

发动机排气管隔热保温套及加工工艺
技术领域
本发明涉及机动车发动机排气技术领域，具体涉及发动机排气管隔热保温套。
背景技术
发动机排气管吸收高温气体后温度升高，热量向四周散发，为了防止热量对管道周边的零部件造成损伤，会在排气管外部增加隔热罩进行隔热，然而传统隔热罩往往受限于材料工艺等问题，其外表面温度仍然较高，隔热效果不理想，容易加速零件老化，缩短使用寿命。
发明内容
为了解决目前发动机排气系统管道隔热效果不理想的现状，本发明提供了一种发动机排气管隔热保温套，并采用如下技术方案：
本发明一种发动机排气管隔热保温套，包括隔热本体和紧固装置；所述隔热本体包括直管部分和弯头部分且为多层结构，包括中间隔热层、内保温层、内防护网和外保温层。
进一步的，所述隔热本体多层结构还包括外防护网。
进一步的，所述弯头部分和直管部分沿着排气管道的走向分成若干段；通过缝合形成沿轴线分割开的包裹形状，并在包裹在排气管道上后，通过紧固装置形成紧固在排气管道外侧且与排气管道紧密贴合的保温结构。
进一步的，所述中间隔热层采用纳米微孔绝热材料，包括纳米二氧化硅气凝胶毡。
进一步的，所述内保温层采用耐高温纤维布，包括玄武岩纤维布、碳纤维布和玻璃纤维布；所述内防护网采用金属防护丝网，包括304不锈钢丝网、合金丝网和铁丝网；所述外保温层采用耐高温纤维布，包括玄武岩纤维布、碳纤维布和玻璃纤维布。
进一步的，所述外防护网采用金属防护丝网，包括304不锈钢丝网、合金丝网和铁丝网。
进一步的，所述紧固装置为连接销固定结构；或拉簧连接固定结构。
进一步的，所述紧固装置材质为不生锈高温合金材料。
本发明一种发动机排气管隔热保温套，按以下步骤加工：
S1、将中间隔热层材料按样板切割成形；
S2、将切割好的内保温层和内防护网铺垫在成型好的中间隔热层内用钢夹夹紧固定；
S3、用0.3mm钢丝或缝纫机将内保温层、内防护网和中间隔热层缝合在一起；
S4、将切割好的外保温层和外防护网包裹在中间隔热层表面用钢夹夹紧固定；
S5、用0.3mm钢丝或缝纫机将外保温层、外防护网和中间隔热层缝合在一起。
进一步的，所有缝合边缘均折出0.5cm-3cm宽的包边部分，用缝纫机沿纳米微孔绝热材料的边缘进行连接缝合。
本发明的有益效果在于：采用纳米二氧化硅气凝胶毡等纳米微孔绝热材料作为中间隔热层，导热系数低，隔热效果是好，厚度仅为传统材料的三分一，贴合式柔性弧面设计与管道更贴合切断热量流失的空间，增加了套内层表面与管外壁的有效接触面积，减少噪音及震动，避免了发动机运行时因壳壁与套内层空隙所造成的共振；另外，由于纳米微孔绝热材料在使用过程中易产生粉尘颗粒，不仅对人身体造成潜在危害，而且随着颗粒的脱落，纳米微孔绝热层隔热效果和使用寿命会下降，因此通过内保温层与外保温层将纳米微孔绝热层表面包裹并用进行缝合固定，可以有效防止粉尘颗粒脱落影响隔热效果；另一方面，本发明提供的分段式缝合设计解决了普通缝纫难以加工的问题，节省缝纫时间，提高了生产及安装效率，降低了生产成本。
附图说明
图1为发动机排气管隔热保温套结构示意图。
图2为隔热本体结构示意图。
附图中，1为隔热本体，11为直管部分，12为弯头部分，101为中间隔热层， 102为内保温层，103为内防护网，104为外保温层；2为紧固装置；3为缝合线。
下面结合附图和实施例对本发明作进一步的说明。
具体实施方式
请参阅图1本发明一种发动机排气管隔热保温套，包括隔热本体1和紧固装置2；隔热本体1包括直管部分11和弯头部分12且为多层结构，包括中间隔热层101、内保温层102、内防护网103、外保温层104和外防护网（未标识）。
在本实施例中，弯头部分12和直管部分11沿着排气管道的走向分成5段；通过缝合形成沿轴线分割开的包裹形状，并在包裹在排气管道上后，通过紧固装置2形成紧固在排气管道外侧且与排气管道紧密贴合的保温结构。
在本实施例中，中间隔热层101采用纳米二氧化硅气凝胶毡。内保温层102采用玻璃纤维布，内防护网103采用304不锈钢丝网。外保温层104采用耐高温纤维布，外防护网采用304不锈钢丝网。
在本实施例中，紧固装置2为拉簧连接固定结构，如图1所示。
在其他实施方案中，紧固装置2可以使用不生锈高温合金材料的连接销进行连接。
在本实施例中，本发明发动机排气管隔热保温套，按以下步骤加工：
S1、将中间隔热层材料即纳米二氧化硅气凝胶毡按样板切割成形；
S2、将切割好的内保温层102和内防护网103铺垫在成型好的中间隔热层101内用钢夹夹紧固定；
S3、用0.3mm钢丝将内保温层102、内防护网103和中间隔热层101缝合在一起；
S4、将切割好的外保温层104和外防护网（未标识）包裹在中间隔热层101表面用钢夹夹紧固定；
S5、用0.3mm钢丝将外保温层104、外防护网（未标识）和中间隔热层101缝合在一起。
在本实施例中，所有缝合边缘均折出1cm宽的包边部分，用缝纫机沿纳米二氧化硅气凝胶毡的边缘进行缝合。
本发明的有益效果在于：采用纳米二氧化硅气凝胶毡等纳米微孔绝热材料作为中间隔热层，导热系数低，隔热效果是传统材料的5倍，厚度仅为传统材料的三分一，贴合式柔性弧面设计与管道更贴合切断热量流失的空间，增加了套内层表面与管外壁的有效接触面积，减少噪音及震动，避免了发动机运行时因壳壁与套内层空隙所造成的共振；另外，由于纳米微孔绝热材料在使用过程中易产生粉尘颗粒，不仅对人身体造成潜在危害，而且随着颗粒的脱落，纳米微孔绝热层隔热效果和使用寿命会下降，因此通过内保温层与外保温层将纳米微孔绝热层表面包裹并用进行缝合固定，可以有效防止粉尘颗粒脱落影响隔热效果；另一方面，本发明提供的分段式缝合设计解决了普通缝纫难以加工的问题，节省缝纫时间，提高了生产及安装效率，降低了生产成本。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (10)

1.一种发动机排气管隔热保温套，包括隔热本体和紧固装置；其特征在于：所述隔热本体包括直管部分和弯头部分且为多层结构，包括中间隔热层、内保温层、内防护网和外保温层。
2.根据权利要求1所述的一种发动机排气管隔热保温套，其特征在于：所述隔热本体多层结构还包括外防护网。
3.根据权利要求1所述的一种发动机排气管隔热保温套，其特征在于：所述弯头部分和直管部分沿着排气管道的走向分成若干段；通过缝合形成沿轴线分割开的包裹形状，并在包裹在排气管道上后，通过紧固装置形成紧固在排气管道外侧且与排气管道紧密贴合的保温结构。
4.根据权利要求1所述的一种发动机排气管隔热保温套，其特征在于：所述中间隔热层采用纳米微孔绝热材料，包括纳米二氧化硅气凝胶毡。
5.根据权利要求1所述的一种发动机排气管隔热保温套，其特征在于：所述内保温层采用耐高温纤维布，包括玄武岩纤维布、碳纤维布和玻璃纤维布；所述内防护网采用金属防护丝网，包括304不锈钢丝网、合金丝网和铁丝网；所述外保温层采用耐高温纤维布，包括玄武岩纤维布、碳纤维布和玻璃纤维布。
6.根据权利要求2所述的一种发动机排气管隔热保温套，其特征在于：所述外防护网采用金属防护丝网，包括304不锈钢丝网、合金丝网和铁丝网。
7.根据权利要求1所述的一种发动机排气管隔热保温套，其特征在于：所述紧固装置为连接销固定结构；或拉簧连接固定结构。
8.根据权利要求1所述的一种发动机排气管隔热保温套，其特征在于：所述紧固装置材质为不生锈高温合金材料。
9.一种发动机排气管隔热保温套，按以下步骤加工：
S1、将中间隔热层材料按样板切割成形；
S2、将切割好的内保温层和内防护网铺垫在成型好的中间隔热层内用钢夹夹紧固定；
S3、用0.3mm钢丝或缝纫机将内保温层、内防护网和中间隔热层缝合在一起；
S4、将切割好的外保温层和外防护网包裹在中间隔热层表面用钢夹夹紧固定；
S5、用0.3mm钢丝或缝纫机将外保温层、外防护网和中间隔热层缝合在一起。
10.根据权利要求9所述的一种发动机排气管隔热保温套的加工工艺，其特征在于：所有缝合边缘均折出0.5cm-3cm宽的包边部分，用缝纫机沿纳米微孔绝热材料的边缘进行连接缝合。
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CN112677499A (zh) * 2020-12-22 2021-04-20 上海航天化工应用研究所 一种固体火箭发动机绝热层滚压贴片装置
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CN113619214A (zh) * 2021-08-13 2021-11-09 重庆康明斯发动机有限公司 一种高转速柴油机的增压器隔热罩及其制备方法
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