CN103075236B - 降低汽车尾气排放的波纹连接管装置 - Google Patents

降低汽车尾气排放的波纹连接管装置 Download PDF

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CN103075236B
CN103075236B CN201310009782.0A CN201310009782A CN103075236B CN 103075236 B CN103075236 B CN 103075236B CN 201310009782 A CN201310009782 A CN 201310009782A CN 103075236 B CN103075236 B CN 103075236B
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end cap
air inlet
anger
corrugated
connecting tube
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CN103075236A (zh
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陈炳泉
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WUXI XISHAN HUANYU METAL SOFT TUBE 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
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/101—Three-way catalysts
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    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • F01N13/1811—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration
    • F01N13/1816—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration the pipe sections being joined together by flexible tubular elements only, e.g. using bellows or strip-wound pipes
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    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
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    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
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    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
    • F01N3/2875—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration by using elastic means, e.g. spring leaves, for retaining catalyst body in the housing
    • 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
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2892—Exhaust flow directors or the like, e.g. upstream of catalytic device
    • 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
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/20—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a flow director or deflector
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/10—Exhaust treating devices having provisions not otherwise provided for for avoiding stress caused by expansions or contractions due to temperature variations
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    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/14—Exhaust treating devices having provisions not otherwise provided for for modifying or adapting flow area or back-pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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    • F01N2350/00—Arrangements for fitting catalyst support or particle filter element in the housing
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    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract

本发明涉及一种降低汽车尾气排放的波纹连接管装置，防护体的两端分别与进气端盖和出气端盖连接，所述进气端盖和出气端盖的轴向端面上均设有环状凸肩，在进气端盖和出气端盖中均设有连接管，所述波纹软管位于防护体中，波纹软管的两端分别与进气端盖的环状凸肩以及出气端盖的环状凸肩的轴向端面连接，所述弹性部件位于波纹软管中，所述弹性部件的两端分别与进气端盖的环状凸肩以及出气端盖的环状凸肩外圆周壁连接，三元催化器的一端与进气端盖中的连接管的内圆周壁面固定连接，三元催化器的另一端滑动配合于出气端盖中的连接管中。本发明能避免波纹软管形成崩紧状态下造成波纹管损坏，以及避免波纹软管工作时与其他部件产生干涉。

Description

降低汽车尾气排放的波纹连接管装置
技术领域
本发明涉及一种降低汽车尾气排放的波纹连接管装置。
背景技术
用汽油发动机作为动力的汽车、摩托车尾气的净化通常采用在尾气排放管内装入三元催化净化器，其基本构成为尾气能顺利通过的多孔芯体，在芯体上粘附有铂、钯、铑三种贵金属组成的三元催化剂，该多孔芯体即为催化剂三元催化器。当尾气通过催化剂三元催化器时，与三元催化剂接触，其中一氧化碳、碳氢化合物、氮氧化物等有害气体，在三元催化剂的催化作用下形成无害气体，达到允许的排放标准。在三元催化净化器开发初期，芯体一般都是以蜂窝状陶瓷为基体作为催化触媒的主要来源，其耐压、耐振及耐急热急冷性较差，从而易产生汽车行驰的可靠性问题，也不能有效能解决废气污染环境的问题。但由于它的机械强度，高温性能等，限制了使用寿命和净化效果的提高，其使用寿命为二年左右，汽车有效净化行程五万公里。
现有的发动机废气处理装置，是将三元催化净化器安装在一个管道中，管道由进气端盖、出气端盖以及波纹软管组成，波纹软管连接在进气端盖和出气端盖之间，三元催化净化器位于波纹管中。当高温的气体通过处理装置时，波波纹软管受力会沿其轴向产生形变，同时，高温的气流对处理装置产生径向的作用力，使处理装置产生振动。由于波纹软管无任何保护措施，当波纹软管的轴向变化达到最大后，波纹软管形成崩紧的状态，在径向的振动作用力下，波纹软管与进气端盖或出气端盖的接口处易折断。因此，目前的这种处理装置具有使用寿命短的缺陷。
发明内容
针对上述技术问题，本发明提供一种降低汽车尾气排放的波纹连接管装置，本发明能避免波纹软管形成崩紧状态下造成波纹管损坏，以及避免波纹软管工作时与其他部件产生干涉。
降低汽车尾气排放的波纹连接管装置，包括壳体和设置于壳体内的三元催化器，所述的壳体包括进气端盖、出气端盖以及波纹软管，还包括弹性部件，所述壳体还包括位于进气端盖和出气端盖之间的防护体，防护体的两端分别与进气端盖和出气端盖连接，所述进气端盖和出气端盖的轴向端面上均设有环状凸肩，在进气端盖和出气端盖中均设有连接管，所述波纹软管位于防护体中，波纹软管的两端分别与进气端盖的环状凸肩以及出气端盖的环状凸肩的轴向端面连接，所述弹性部件位于波纹软管中，所述弹性部件的两端分别与进气端盖的环状凸肩以及出气端盖的环状凸肩外圆周壁连接，三元催化器的一端与进气端盖中的连接管的内圆周壁面固定连接，三元催化器的另一端滑动配合于出气端盖中的连接管中。
采用了上述方案，防护体的两端分别与进气端盖和出气端盖连接，所述波纹软管位于防护体中，通过防护体可对波纹软管形成保护作用，避免波纹软管直接受到外物的伤害，并且，当波纹软管发生伸缩时，防护体在受力情况下也发生形变。波纹软管的两端分别与进气端盖的环状凸肩以及出气端盖的环状凸肩的轴向端面连接，所述弹性部件位于波纹软管中，所述弹性部件的两端分别与进气端盖的环状凸肩以及出气端盖的环状凸肩外圆周壁连接。当波纹软管受轴向作用力伸长时，由于弹性部件的刚性作用，使得弹性部件轴向方向的伸长量会小于波纹软管的伸长量，因此，弹性部件使波纹软管的伸长量限制在弹性部件的伸长量范围内，避免波纹软管形成崩紧的状态，对波纹软管形成了保护作用。当车辆在颠簸时产生的径向作用力作用于波纹软管上时，不会使非崩紧状态下的波纹软管造成破坏。另外，由于弹性部件的作用，减小了波纹软管径向振幅，降低了振动频率，也改变了装置整体的谐振频率，有助于防止波纹软管接口处因疲劳而折断的缺陷，不再因疲劳强度超限而断裂失效。另外，波纹软管、弹性部件与进气端盖和出气端盖的构造方式，当波纹软管和弹性部件发生形变时，可以避免波纹软管和弹性部件之间发生干涉，确保波纹软管和弹性部件发挥出自身的功能，提高本发明的可靠性。在进气端盖和出气端盖中均设有连接管，三元催化器的一端与进气端盖中的连接管的内圆周壁面固定连接，三元催化器的另一端滑动配合于出气端盖中的连接管中。三元催化器的两端分别通过连接管进行支撑，增加了三元催化器的稳定性，并且当波纹管沿轴向形变时，三元催化器的可以沿着出气端盖中的连接管的轴向进行滑动，避免三元催化器受外力振动的影响而振动。
进一步地，防护体为网状的筒体。采用这种结构的防护体，有利于减轻防护体自体重量。
进一步地，所述三元催化器包括第一薄片和第二薄片叠合卷成的多层柱体，第一薄片和第二薄片的表面均设置有三元催化剂，所述第一薄片的表面为波纹面。三元催化器采用了这样的结构后，第一薄片和第二薄片和的表面积增大，也就是增加了粘附三元催化剂的有效面积，可以增加三元催化剂的粘附量，因此，有利于提高三元催化器对发动机废气的处理效果。
进一步地，所述第一薄片的波纹面上的各个波纹波峰夹角为70°—100°，各个波纹的高度为1.2—2mm。这种结构的第一薄片卷绕成，当气体流过第一薄片的表面时，由于其波峰夹角为70°—100°，减小气阻，不但利于气流通过多层柱体，而且气流与薄片的表面接触很充分，对发动机废气的处理效果大为提高。
进一步地，所述进气端盖中设有多孔陶瓷的气体缓冲燃烧盘。通过多孔陶瓷的气体缓冲燃烧盘对废气的先行处理，一方面可以使废气予以再度充分燃烧，减少的废气的排放，减少三元催化器的工作负担，减少了三元催化器的堵塞延长了使用寿命，另一方面有利于缩小三元催化器的体积，同时减少了金属的催化剂的浪费。
附图说明
图1为本发明的降低汽车尾气排放的波纹连接管装置的结构示意图；
1为进气端盖，2为出气端盖，3为波纹软管，4为防护体，5为气体缓冲燃烧盘，6为环状凸肩，7为连接管，8为套管，9为波纹段。
具体实施方式
参照图1，本发明的降低汽车尾气排放的波纹连接管装置，包括壳体和设置于壳体内的三元催化器以及弹性部件。壳体包括进气端盖1、出气端盖2以及波纹软管3，所述壳体还包括位于进气端盖和出气端盖之间的防护体4。在进气端盖中设有多孔陶瓷的气体缓冲燃烧盘5，气体缓冲燃烧盘5使废气予以再度充分燃烧，减少的废气的排放，减少三元催化器的工作负担。进气端盖1和出气端盖2的轴向端面上均设有环状凸肩6，环状凸肩6主要用于装配波纹软管和弹性部件，使波纹软管和弹性部件在工作时相互不发生干涉作用。在进气端盖1和出气端盖2中均设有连接管7，该连接管7用于装配所述三元催化器。防护体4的两端分别与进气端盖和出气端盖连接，防护体4为网状的筒体，该网状的筒体可以采用金属丝网，也可以采用耐高温的塑料制作而成。所述波纹软管3位于防护体4中，波纹软管3的两端分别与进气端盖1的环状凸肩6以及出气端盖2的环状凸肩6的轴向端面连接。所述弹性部件位于波纹软管3中，所述弹性部件的两端分别与进气端盖1的环状凸肩6以及出气端盖的环状凸肩外圆周壁连接。所述弹性部件包括套管8，在套管的圆周壁面上间隔地设置多段可伸缩的波纹段9，这些波纹段为套管内管壁向外管壁冲压而成型。三元催化器的一端与进气端盖中的连接管的内圆周壁面固定连接，三元催化器的另一端滑动配合于出气端盖中的连接管中。所述三元催化器包括第一薄片和第二薄片叠合卷成的多层柱体（图中未示出三元催化器的具体组成结构图），第一薄片和第二薄片的表面均设置有三元催化剂，所述第一薄片的表面为波纹面。所述第一薄片的波纹面上的各个波纹波峰夹角为70°—100°，各个波纹的高度为1.2—2mm。优选地，第一薄片的波纹面上的各个波纹波峰夹角为80°，各个波纹的高度为1.5mm。
本发明不局限于上述实施例，所述弹性部件还可以采用为圆柱形的螺旋弹簧。

Claims (5)

1.一种降低汽车尾气排放的波纹连接管装置，包括壳体和设置于壳体内的三元催化器，所述的壳体包括进气端盖、出气端盖以及波纹软管，其特征在于：还包括弹性部件，所述壳体还包括位于进气端盖和出气端盖之间的防护体，防护体的两端分别与进气端盖和出气端盖连接，所述进气端盖和出气端盖的轴向端面上均设有环状凸肩，在进气端盖和出气端盖中均设有连接管，所述波纹软管位于防护体中，波纹软管的两端分别与进气端盖的环状凸肩以及出气端盖的环状凸肩的轴向端面连接，所述弹性部件位于波纹软管中，所述弹性部件的两端分别与进气端盖的环状凸肩以及出气端盖的环状凸肩外圆周壁连接，三元催化器的一端与进气端盖中的连接管的内圆周壁面固定连接，三元催化器的另一端滑动配合于出气端盖中的连接管中；
所述弹性部件包括套管，在套管的圆周壁面上间隔地设置多段可伸缩的波纹段，这些波纹段为套管内管壁向外管壁冲压而成型，防护体为网状的筒体。
2.根据权利要求1所述的降低汽车尾气排放的波纹连接管装置，其特征在于：所述弹性部件为圆柱形的螺旋弹簧。
3.根据权利要求1所述的降低汽车尾气排放的波纹连接管装置，其特征在于：所述三元催化器包括第一薄片和第二薄片叠合卷成的多层柱体，第一薄片和第二薄片的表面均设置有三元催化剂，所述第一薄片的表面为波纹面。
4.根据权利要求3所述的降低汽车尾气排放的波纹连接管装置，其特征在于：所述第一薄片的波纹面上的各个波纹波峰夹角为70°—100°，各个波纹的高度为1.2—2mm。
5.根据权利要求1—4任意一项所述的降低汽车尾气排放的波纹连接管装置，其特征在于：所述进气端盖中设有多孔陶瓷的气体缓冲燃烧盘。
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