CN106493008A - 交叉孔尿素喷嘴 - Google Patents

交叉孔尿素喷嘴 Download PDF

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Publication number
CN106493008A
CN106493008A CN201611120607.9A CN201611120607A CN106493008A CN 106493008 A CN106493008 A CN 106493008A CN 201611120607 A CN201611120607 A CN 201611120607A CN 106493008 A CN106493008 A CN 106493008A
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Prior art keywords
duct
nozzle
intersects
cross bore
intersection
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CN201611120607.9A
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English (en)
Inventor
邓航
钟盛林
杨宗霖
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Guangxi Yuchai Machinery Co Ltd
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Guangxi Yuchai Machinery Co Ltd
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Priority to CN201611120607.9A priority Critical patent/CN106493008A/zh
Publication of CN106493008A publication Critical patent/CN106493008A/zh
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
    • B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/34—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
    • 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
    • F01N3/18—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 methods of operation; Control
    • F01N3/20—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 methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
    • 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
    • F01N3/18—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 methods of operation; Control
    • F01N3/20—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 methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • 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
    • 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

本发明公开了一种交叉孔尿素喷嘴，包括喷嘴体，该喷嘴体上设有喷孔，喷孔包括：第一交叉孔道；第二交叉孔道，第一交叉孔道和第二交叉孔道在出口处交叉汇聚；以及盲孔，其从出口处沿第一交叉孔道和第二交叉孔道的中心线向内延伸。该交叉孔尿素喷嘴优化雾化效果。

Description

交叉孔尿素喷嘴
技术领域
本发明涉及汽车排气后处理系统，特别涉及一种交叉孔尿素喷嘴。
背景技术
尿素喷嘴是汽车排气后处理系统中的一个零部件，此喷嘴的作用是将尿素溶液喷射进入发动机排气后处理系统，并在喷射过程中可能雾化尿素溶液。如图1所示，尿素喷嘴包括喷嘴管1和喷嘴头3，喷嘴头3上设有喷嘴孔道4，尿素溶液2在喷嘴管1流动，当前的尿素喷嘴为单一孔道均布形式，且孔道为圆形，其中各孔道之间形成一定角度，以控制整体喷射覆盖范围。但是，此类喷嘴存在各孔道流量不均匀，雾化效果差等问题。
公开于该背景技术部分的信息仅仅旨在增加对本发明的总体背景的理解，而不应当被视为承认或以任何形式暗示该信息构成已为本领域一般技术人员所公知的现有技术。
发明内容
本发明的目的在于提供一种交叉孔尿素喷嘴，优化雾化效果。
为实现上述目的，本发明提供了一种交叉孔尿素喷嘴，包括喷嘴体，该喷嘴体上设有喷孔，喷孔包括：第一交叉孔道；第二交叉孔道，第一交叉孔道和第二交叉孔道在出口处交叉汇聚；以及盲孔，其从出口处沿第一交叉孔道和第二交叉孔道的中心线向内延伸。
优选地，盲孔的深度可调整。
与现有技术相比，本发明具有如下有益效果：通过将喷孔设计成交叉孔喷孔的形式，此喷嘴的喷雾粒径比常规单一圆孔孔道喷嘴喷雾更细小，产生高扩散性的喷雾，利于尿素溶液与排气的混合。同时，在第一交叉孔道和第二交叉孔道交汇的区域设置一段盲孔，该交叉孔喷嘴的特殊孔结构使内部尿素溶液产生冲击扰动，在喷孔出口产生了更大范围的高湍动能区，有利于促进雾化，得到雾化粒径更小的喷雾，进而利于更加充分的混合。
附图说明
图1是现有的尿素喷嘴的结构示意图；
图2是根据本发明的交叉孔尿素喷嘴的结构示意图；
图3是根据本发明的交叉孔尿素喷嘴的局部放大图。
具体实施方式
下面结合附图，对本发明的具体实施方式进行详细描述，但应当理解本发明的保护范围并不受具体实施方式的限制。
除非另有其它明确表示，否则在整个说明书和权利要求书中，术语“包括”或其变换如“包含”或“包括有”等等将被理解为包括所陈述的元件或组成部分，而并未排除其它元件或其它组成部分。
如图2至图3所示，根据本发明具体实施方式的一种交叉孔尿素喷嘴，包括喷嘴体21，该喷嘴体21上设有喷孔23，喷孔23包括第一交叉孔道231、第二交叉孔道232以及盲孔233，其中，第一交叉孔道231和第二交叉孔道232在出口处234交叉汇聚，盲孔233从出口处234沿第一交叉孔道231和第二交叉孔道232的中心线向内延伸。
研究发现，喷嘴内尿素溶液22的雾化受到喷射压力、喷孔23几何形状等因素影响。上述方案中，从喷孔23的几何形状入手，优化喷孔23设计，将尿素喷嘴的喷孔23设计为交叉孔形式，如图2所示，喷嘴中的每一个喷孔23都由第一交叉孔道231和第二交叉孔道232交叉汇聚而形成，在第一交叉孔道231和第二交叉孔道232交汇的区域设置一段盲孔233，此盲孔233是沿出口处234到第一交叉孔道231和第二交叉孔道232之间的中心线方向上钻出一定深度的非贯穿孔，以此形成扰动区，加强内部湍流扰动。
作为一种优选实施例，盲孔233的深度可调整。本方案中，交叉孔型喷嘴的喷雾呈扇形，其贯穿距离受喷孔夹角影响，夹角及盲孔233深度都可调整。
综上，本实施例的交叉孔尿素喷嘴，通过将喷孔设计成交叉孔喷孔的形式，此喷嘴的喷雾粒径比常规单一圆孔孔道喷嘴喷雾更细小，产生高扩散性的喷雾，利于尿素溶液与排气的混合。同时，在第一交叉孔道231和第二交叉孔道232交汇的区域设置一段盲孔233，该交叉孔喷嘴的特殊孔结构使内部尿素溶液产生冲击扰动，在喷孔出口产生了更大范围的高湍动能区，有利于促进雾化，得到雾化粒径更小的喷雾，进而利于更加充分的混合。
前述对本发明的具体示例性实施方案的描述是为了说明和例证的目的。这些描述并非想将本发明限定为所公开的精确形式，并且很显然，根据上述教导，可以进行很多改变和变化。对示例性实施例进行选择和描述的目的在于解释本发明的特定原理及其实际应用，从而使得本领域的技术人员能够实现并利用本发明的各种不同的示例性实施方案以及各种不同的选择和改变。本发明的范围意在由权利要求书及其等同形式所限定。

Claims (2)

1.一种交叉孔尿素喷嘴，包括喷嘴体，该喷嘴体上设有喷孔，其特征在于，所述喷孔包括：
第一交叉孔道；
第二交叉孔道，所述第一交叉孔道和所述第二交叉孔道在出口处交叉汇聚；以及
盲孔，其从所述出口处沿所述第一交叉孔道和所述第二交叉孔道的中心线向内延伸。
2.根据权利要求1所述的交叉孔尿素喷嘴，其特征在于，所述盲孔的深度可调整。
CN201611120607.9A 2016-12-08 2016-12-08 交叉孔尿素喷嘴 Pending CN106493008A (zh)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113187637A (zh) * 2021-04-06 2021-07-30 大连理工大学 一种带交汇结构的复合孔喷嘴
CN114682407A (zh) * 2020-12-31 2022-07-01 大连理工大学 一种射流式旋流槽交叉孔喷射器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10328331A1 (de) * 2002-06-25 2004-01-29 Denso Corp., Kariya Kraftstoffeinspritzdüse
CN101294533A (zh) * 2008-05-27 2008-10-29 大连理工大学 内燃机交叉喷孔式喷油嘴
CN101333993A (zh) * 2008-07-15 2008-12-31 大连理工大学 带扰动区的内燃机交叉喷孔式喷油嘴
CN103657894A (zh) * 2013-12-06 2014-03-26 北京京能电力股份有限公司石景山热电厂 用于尿素热解制氨工艺的雾化喷嘴及溶液雾化装置
CN206240668U (zh) * 2016-12-08 2017-06-13 广西玉柴机器股份有限公司 交叉孔尿素喷嘴

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10328331A1 (de) * 2002-06-25 2004-01-29 Denso Corp., Kariya Kraftstoffeinspritzdüse
CN101294533A (zh) * 2008-05-27 2008-10-29 大连理工大学 内燃机交叉喷孔式喷油嘴
CN101333993A (zh) * 2008-07-15 2008-12-31 大连理工大学 带扰动区的内燃机交叉喷孔式喷油嘴
CN103657894A (zh) * 2013-12-06 2014-03-26 北京京能电力股份有限公司石景山热电厂 用于尿素热解制氨工艺的雾化喷嘴及溶液雾化装置
CN206240668U (zh) * 2016-12-08 2017-06-13 广西玉柴机器股份有限公司 交叉孔尿素喷嘴

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114682407A (zh) * 2020-12-31 2022-07-01 大连理工大学 一种射流式旋流槽交叉孔喷射器
CN113187637A (zh) * 2021-04-06 2021-07-30 大连理工大学 一种带交汇结构的复合孔喷嘴

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