CN104053881A - 废气换热器 - Google Patents
废气换热器 Download PDFInfo
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- CN104053881A CN104053881A CN201380005297.4A CN201380005297A CN104053881A CN 104053881 A CN104053881 A CN 104053881A CN 201380005297 A CN201380005297 A CN 201380005297A CN 104053881 A CN104053881 A CN 104053881A
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- 230000001105 regulatory effect Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
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- 239000000659 freezing mixture Substances 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 230000000712 assembly Effects 0.000 claims 1
- 238000000429 assembly Methods 0.000 claims 1
- 238000002485 combustion reaction Methods 0.000 claims 1
- 238000007789 sealing Methods 0.000 abstract description 4
- 239000002826 coolant Substances 0.000 abstract description 3
- 238000001816 cooling Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
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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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/0205—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using heat exchangers
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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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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- F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
- F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using heat
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- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/23—Layout, e.g. schematics
- F02M26/25—Layout, e.g. schematics with coolers having bypasses
- F02M26/26—Layout, e.g. schematics with coolers having bypasses characterised by details of the bypass valve
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- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
- F02M26/32—Liquid-cooled heat exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
- F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
- F28D7/103—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically consisting of more than two coaxial conduits or modules of more than two coaxial conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
- F28D7/106—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically consisting of two coaxial conduits or modules of two coaxial conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
- F28F27/02—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus for controlling the distribution of heat-exchange media between different channels
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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
- 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
- F01N2240/02—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 heat exchanger
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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
- 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
- F01N2240/36—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 an exhaust flap
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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
- F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
- F01N2260/02—Exhaust treating devices having provisions not otherwise provided for for cooling the device
- F01N2260/024—Exhaust treating devices having provisions not otherwise provided for for cooling the device using a liquid
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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
- F01N2470/00—Structure or shape of gas passages, pipes or tubes
- F01N2470/02—Tubes being perforated
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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- F01N2470/00—Structure or shape of gas passages, pipes or tubes
- F01N2470/02—Tubes being perforated
- F01N2470/04—Tubes being perforated characterised by shape, disposition or dimensions of apertures
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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
- F01N2470/00—Structure or shape of gas passages, pipes or tubes
- F01N2470/24—Concentric tubes or tubes being concentric to housing, e.g. telescopically assembled
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
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Abstract
本发明涉及一种用于冷却废气流的废气设备的废气换热器,废气换热器具有内管(2)和外管(3),其中两个管(2,3)在进口侧间接地或直接地密封地相互焊接,在外部围绕外管(3)设置有套管(3.1),并且在外管和套管之间构成用于冷却剂的环形间隙(5),并且内管(2)沿流动方向(S)在端部具有轴向流动横截面(A2),和在垂直于流动方向(S)的方向上具有构成径向流动横截面的穿孔(P2)。在内管(2)和外管(3)之间构成用于废气流的废气通道(6),其中,在内管(2)上可移动和/或可转动地支承的中间管(4)配备有穿孔(P4),内管(2)的轴向流动横截面(A2)可以至少部分地通过中间管(4)封闭。
Description
本发明涉及一种用于冷却废气流的废气设备的废气换热器。废气换热器具有内管和外管,其中,所述两个管在进口侧间接地或直接地密封地相互焊接。在内管和外管之间构成用于废气流的废气通道。围绕外管在外部设置套管并且在外管和套管之间构成用于冷却剂的环形间隙。内管在垂直于流动方向的方向上具有带有具有等大的径向的流动横截面的穿孔,并且沿流动方向在出口处具有带有轴向流动横截面的出口。
这样设计的废气换热器在文献EP 1 555 421 A2和文献JP 2010/31671 A中已被描述,据此,内管具有穿孔,并且轴向流动横截面可通过阀门封闭,因此废气流在外管中通过内管和/或通过废气换热器被引导。
在文献DE 10 2010 039 281 A1中描述了一种具有中央节流阀的余热回收装置,通过所述余热回收装置调节中央贯穿导管和旁路导管中的物料流调节。
文献JP 2008-101479 A同样描述了一种用于在废气流中进行热交换的装置,所述装置通过中央节流阀被调节。冷却以对流方法进行。
本发明所要解决的技术问题在于,保证废气换热器的简单布置,通过该布置可以利用冷却介质从废气流中带走精确数量的热能。
所述技术问题按照本发明这样解决,即在内管上可移动和/或可旋转地支承的中间管设有穿孔,所述穿孔构成等同的径向流动横截面,内管的穿孔可以至少部分被中间管封闭,并且可改变径向流动横截面。在此,中间管设计为滑片形式,用于打开和封闭在内管中构成穿孔的孔。
由此实现的是,废气流可以在不流经穿孔且因此没有在外管中继续冷却的情况下几乎完全被引导穿过内管并穿过开口。由此在另一步骤中相反也可行的是,废气流为在外管中进行热交换而几乎完全被引导穿过穿孔,并且内管沿轴向完全被封闭。
按照本发明的废气换热器集成在外管中,并且可以线形地嵌入废气管道中。为此,废气换热器按照本发明具有相对于中心轴线同轴布置的入口法兰和出口法兰。相应地规定,内管沿流动方向一直布置在外管之前,并且中间管设计得比内管更短。
对于前述的相反的流动方案有利的是,所述开口能通过可调节的装置被至少部分封闭,并且轴向的流动横截面是可变的。装置优选设计为可开关的罩盖或阀门,所述罩盖或阀门主动地或被动地被开关元件控制。
和所述装置一样,中间管也可以通过相同的或另外的开关元件开关。
特别有利的是,开口的轴向流动横截面和内管的穿孔的径向流动横截面可以同时改变。由此简化了调节,并且可以最简单地实现对在轴向或径向上的废气流进行几乎完全调节的优选方案。
同样有利的是,中间管的穿孔与内管的穿孔至少部分重合,或者两个通过穿孔构成的径向流动横截面几乎相同。在穿孔精确重叠时,在废气换热器中出现最小的干扰噪音,因为穿孔的孔精确重合时不构成流动棱边。为此有利的是,穿孔的孔的棱边至少部分环绕地倒角或倒圆,用于避免干扰噪音。
在开关方面有利的是,可驱动中间管围绕中心轴线转动地和/或沿中心轴线的方向开合。中间管要么旋转要么移动,但是两者不能同时进行。
特别有利的是,装置和中间管设计为组件,从而中间管和装置可通过开关元件同时运动。特别是中间管沿轴向的滑移允许该中间管非常好地与用于封闭内管的盖组合成组件。
在这种变型方面特别有利的是,开关元件穿过外管或穿过连接在外管上的管被向外引导,并且与驱动装置耦连。其中,组件被设计为一体式的。
在一种特别的实施例中规定,中间管通过轴承元件或轴承器件支承在内管上。为此,在中间管的端部的区域中,在内管上设置有滑动轴承圈,中间管在所述滑动轴承圈上滑动。轴承元件或轴承器件同时被用作密封器件。
特别有利的是,径向流动横截面作为构成内管的穿孔的所有孔的面积总和至少相当于轴向流动横截面的1.2至1.7倍。由此使得在换热器的功率最大时使反向阻塞阻力最小。
同样也有利的是,可通过由废气产生的废气背压或通过执行器对开关元件进行主动或被动地控制。由此可以实现被动控制,使得系统自我控制。在此,在不通过控制器主动且直接调节中间管或装置的情况下,根据废气背压进行对流体横截面的改变。这种自我控制也被称为半自动的。
按照本发明的解决方案按如下所示进行:用于调节废气设备中的废气换热器中的废气流的方法,其中,废气换热器具有内管和支承在内管上的中间管,内管和中间管沿相对中心轴线的径向分别具有带有径向流动横截面的穿孔。中间管相对内管可转动或可移动地支承,并且沿径向穿过内管的穿孔、朝向废气通道流动的废气流的量通过调节中间管而被调节。
这种方法优选借助如前所述的废气换热器实施。
优选的解决方案可以实现的是,沿轴向流动穿过沿流动方向设置在穿孔之后的内管的开口的废气流的量通过调节装置被调节,其中,所述中间管和所述装置被同时调节。
本发明的其他优点和细节在说明书中被阐述并且在附图中被显示。在附图中:
图1以剖视图方式示出内管和中间管的具有重合定位的穿孔的原理图;
图2示出按照图1沿轴向移动到穿孔的不重合位置上的视图;
图3示出按照图1沿周向围绕中心轴线转动到穿孔的不重合位置上的视图;
图4示出废气换热器的入口侧的部分;
图5a示出废气换热器的出口侧的部分的实施例,该出口侧的部分具有由中间管和处于封闭位置上的盖罩组成的组件;
图5b示出按照图5a的罩盖处于打开位置上的实施例;
图6示出按照图5a根据剖切线A-A’所得的轴向视图;
图7示出具有可开关的阀门的废气换热器的出口侧的部分的第二实施例;
图8示出具有可开关的盖板的废气换热器的出口侧的部分的第二实施例。
在附图中示出这样设计的废气换热器1,所述废气换热器具有由内管2构成的废气管和在内管2和外管3之间构成的废气通道6,其中,废气流通过内管2进入废气换热器1。外管3与套管3.1构成双壁式的。在外管3和套管3.1之间设置用于冷却剂的环形间隙5。在此描述了一方面调节沿轴向穿过端侧开口2.1从内管2流出的废气流的量,另一方面调节沿径向穿过内管2的穿孔P2进入废气通道6的废气流的量的解决方案。
图1至3示出的支承在内管2上的中间管4的原理图的剖视图。两个管2、4同轴地围绕中间轴线M设置。中间管4在两侧是打开的。按照图4,内管2在左侧的进口侧与外管3相连,并且具有对置的、在右侧的出口侧的带有内部轴向流动横截面A2的开口2.1。此外,内管2相对中心轴线M沿径向具有由多个孔构成的穿孔P2,并且中间管4具有相似的并且沿径向重合的穿孔P4。两种穿孔P2、P4分别构成等同的径向流动横截面。
没有详细示出的废气流在内管2沿总体流动方向S流动。如箭头所示,中间管4在相对内管2没有较大缝隙的情况下在内管2上沿轴向可滑移地并且可围绕中心轴线M转动地被支承。
沿流动方向S流动且应该沿径向穿过穿孔P2、P4流动的废气流的量可以直接地通过可滑移和可旋转的中间管4调节。
一旦两个管2、4的穿孔P2、P4相互重合地设置,则废气流的最大量沿径向穿过内管2和中间管4向外流入到在内管2和外管3之间的构成的废气通道6中。在中间管4相对内管2如在图2和图3中所示的位置中,废气流的径向分量完全被阻塞,没有废气沿径向穿过内管2和中间管4流入废气通道6中。在图1所示的状况与图2和3所示的状况之间的可能的中间位置中,可以对废气流沿径向的量进行调节。
根据图4至6,沿轴向在内管2的端部附加地设置用于封闭开口2.1、也就是封闭内管2的轴向流动横截面A2的装置7。
图4示出具有带输入侧法兰12的双壁式外管3的废气换热器1的输入侧部分。废气换热器1的所述部分可以与多种解决方案组合,所述方案能够借助装置7封闭内管2的开口2.1并开合中间管4。这些解决方案在图5a至8中示出。
根据图4,内管2和中间管4包含在双壁式外管3中。三个管2、3、4在进口侧间接或直接地密封地相互连接。
按照这种实施例,内管2和中间管4的穿孔P2、P4是重合的,由此可根据沿轴向的流动横截面的变化使废气流沿径向的量被最大化。废气流被引导穿过在内管2和中间管4之间构成的废气通道6的分量流入外管3的内侧并且传递热量。
外管3设计为双壁式的,其中,围绕外管3设置套管3.1并且因此在外管3和套管3.1之间构成环形间隙5,流体作为冷却介质在环形间隙5中流动。所述流体通过两个与环形间隙5相连的接管10、11与未示出的第二废气换热器循环连通并且因此将废气流的热量输出。
沿流动方向S可以在出口侧设置不同的可行方案,用于改变沿轴向穿过内管2的流动横截面A2。在此,对穿过中间管4的废气流的径向分量的调节可以独立于对废气流的轴向分量的调节进行。
按照一种优选的和对于所述技术问题的最好的解决方案的实施例,轴向分量和径向分量的调节是耦连的,从而使中间管4同时相对用于轴向的流动横截面A2的装置7被调节。
这种调节实现了0至100%的废气流沿径向被引导穿过穿孔P2、P4被引导,而100%至0的废气流沿轴向被引导穿过整个内管2。
按照图5a和5b,为作为装置的罩盖7设有作为开关元件8的顶杆,其中,罩盖7与中间管4连接成组件。被设计为顶杆的开关元件8与罩盖7相连并且相对于中心轴线M同轴地设置,至少内管2和中间管4也围绕中心轴线M同轴地布置。在该实施例中,外管3和套管3.1同样相对中心轴线M同轴地布置。
开关元件8穿过连接在外管3上的弯管3.2的壁向外引导,并且通过设置在管3.2上的接管3.3沿中心轴线M的方向被支承并且被密封。通过开关元件8沿轴向移动罩盖7被沿轴向移动,用于封闭或打开轴向流动横截面A2,并且同时借助罩盖7移动中间管4,用于打开和封闭在内管2中的穿孔P2。
按照图5a,内管2沿轴向通过罩盖7在整个轴向流动横截面A2上被封闭,并且整个废气流可以按照图1的视图沿径向穿过通过穿孔P2、P4从内管2中流出。内管2和中间管4的穿孔P2、P4是重合的。
一旦罩盖7从按照图5a的封闭位置调节至按照图5b的打开位置,则内管2在其轴向流动横截面A2上打开。同时,中间管4根据图2向这一位置移动,在该位置上,内管2上的穿孔P2通过中间管4的区域被封闭,并且不设有用于穿孔P4的开孔。废气流因此仅沿轴向从内管2流出。
在图6中示出朝向废气换热器1的罩盖7的俯视图,所述废气换热器类似于按照图5a和5b的废气换热器1。在此处所示的实施例中,中间管4通过轴承9支承在外管3上。此外,中间管4在轴承9直至罩盖7的区域中的直径大于在穿孔P4的区域中的直径,因此构成环绕罩盖7的用于罩盖7的分段式的容纳体。然而在这种实施例中,两个接管10、11对置地设置。
按照图7,在内管2中设置可开关的阀门作为装置7,所述装置可以独立于中间管4从废气换热器1的外部通过未示出的开关元件8被调节。在这种实施例中,用于阀门7的开关元件8被引导穿过外管3和套管3.1。外管3相对中心轴线M沿轴向通过另外的法兰13连接在未示出的废气设备上。
根据按照图8的实施例,设置具有开关元件8的罩盖7,通过开关元件8可以独立于中间管4调节沿轴向流过内管2的废气流的量。
Claims (11)
1.一种用于冷却废气流的废气设备的废气换热器(1),所述废气换热器具有内管(2)和外管(3),其中
a)两个管(2、3)在进口侧间接地或直接地密封地相互焊接,
b)在内管(2)和外管(3)之间构成用于废气流的废气通道(6),
c)在外部围绕外管(3)设置套管(3.1),并且在外管(3)和套管(3.1)之间构成用于冷却剂的环形间隙(5),并且
d)内管(2)在垂直于流动方向(S)的方向上具有带有等大的径向流动横截面的穿孔(P2),并且沿流动方向(S)在出口处具有带轴向流动横截面(A2)的开口(2.1),
其特征在于,
e)在内管(2)上以可移动和/或可转动的方式支承的中间管(4)配备有穿孔(P4),所述穿孔构成等大的径向流动横截面,和
f)内管(2)的穿孔(P2)能够通过中间管(4)被至少部分封闭,并且径向流动横截面是可变的。
2.按照权利要求1所述的废气换热器(1),其特征在于,所述开口(2.1)能够通过可调节的装置(7)被至少部分封闭,并且轴向流动横截面(A2)是可变的。
3.按照权利要求1所述的废气换热器(1),其特征在于,开口(2.1)的轴向流动横截面(A2)和内管(2)的穿孔(P2)的径向流动横截面是可同时改变的。
4.按照前述权利要求之一所述的废气换热器(1),其特征在于,中间管(4)的穿孔(P4)至少部分地与内管(2)的穿孔(P2)重合,和/或中间管的穿孔和内管的穿孔的两个径向流动横截面相同。
5.按照前述权利要求之一所述的废气换热器(1),其特征在于,中间管(4)可以围绕中心轴线(M)转动和/或可沿中心轴线(M)开关。
6.按照前述权利要求之一所述的废气换热器(1),其特征在于,装置(7)和中间管(4)设计为组件,其中,设置开关元件(8),中间管(4)和装置(7)可通过该开关元件(8)同时运动。
7.按照前述权利要求之一所述的废气换热器(1),其特征在于,径向流动横截面作为构成内管(2)的穿孔(P2)的所有孔的面积的总和相当于内管(2)的轴向流动横截面(A2)的1.2至1.7倍。
8.按照前述权利要求之一所述的废气换热器(1),其特征在于,开关元件(8)能通过由废气产生的废气背压或通过执行器对开关元件(8)进行主动或被动的控制。
9.一种系统,由按照前述权利要求之一所述的废气换热器(1)和废气设备或用于内燃机和/或用于汽车的废气设备的其他组件组成。
10.一种用于调节废气设备中的废气换热器(1)中的废气流的方法,其中,废气换热器(1)具有内管(2)和支承在内管(2)上的中间管(4),内管(2)和中间管(4)相对中心轴线沿径向分别具有带有径向流动横截面的穿孔(P2、P4),其特征在于,中间管(4)相对内管(2)可转动或可移动地支承,并且沿径向穿过内管(2)的穿孔(P2)、朝向废气通道(6)流动的废气流的量通过调节中间管(4)而被调节。
11.按照权利要求10的方法,其特征在于,沿轴向流动穿过沿流动方向(S)设置在内管(2)的穿孔(P2)之后的开口(2.1)的废气流的量通过调节装置(7)而被调节,其中,所述中间管(4)和所述装置(7)被同时调节。
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US9394813B2 (en) | 2016-07-19 |
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KR20140120335A (ko) | 2014-10-13 |
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