WO2019218589A1 - 消音器和汽车 - Google Patents

消音器和汽车 Download PDF

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Publication number
WO2019218589A1
WO2019218589A1 PCT/CN2018/110782 CN2018110782W WO2019218589A1 WO 2019218589 A1 WO2019218589 A1 WO 2019218589A1 CN 2018110782 W CN2018110782 W CN 2018110782W WO 2019218589 A1 WO2019218589 A1 WO 2019218589A1
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Prior art keywords
muffler
muffling
straight
section
cotton
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PCT/CN2018/110782
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English (en)
French (fr)
Inventor
李俊普
李昭阳
刘兴龙
闫娟
Original Assignee
潍柴动力股份有限公司
潍柴动力空气净化科技有限公司
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Priority claimed from CN201810474093.XA external-priority patent/CN108425719A/zh
Priority claimed from CN201820739662.4U external-priority patent/CN208441906U/zh
Application filed by 潍柴动力股份有限公司, 潍柴动力空气净化科技有限公司 filed Critical 潍柴动力股份有限公司
Publication of WO2019218589A1 publication Critical patent/WO2019218589A1/zh

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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
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
    • F01N1/04—Silencing apparatus characterised by method of silencing by using resonance having sound-absorbing materials in resonance chambers
    • 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
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/10—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling in combination with sound-absorbing materials

Definitions

  • the present invention relates to the field of mechanical industry, and more particularly to a muffler, and to an automobile to which the above muffler is applied.
  • the muffler of a car is a special device for preventing airflow and allowing airflow to pass through, and to prevent airflow dynamic noise.
  • the existing automobile muffler includes a barrel body and a sound absorbing fiber 12 disposed at the inner wall of the barrel body.
  • One side of the barrel body is provided with an air inlet, and the other side is provided with an air outlet, and the barrel body is provided.
  • Two baffles 11 are provided. Due to the influence of the arrangement of the exhaust pipe of the vehicle, the diameter of the muffler inlet and outlet is not much different from the diameter of the barrel, resulting in insufficient expansion ratio, and the noise reduction effect of low frequency noise is not obvious.
  • the double baffle design of the above-mentioned automobile muffler also affects the volume of the internal cavity of the muffler to a certain extent, resulting in insufficient silencing volume.
  • the above-mentioned silencing fiber adopts a filament structure, which is prone to the problem of fiber compaction under the combined action of urea and water vapor, and the aging speed is too fast, so that the silencing ability of the medium and high frequency noise is also significantly deteriorated, and the durability is insufficient.
  • the present invention provides a muffler having a shape in which the aperture of the silencing channel is first reduced and then increased, so that the airflow enters the silencing channel and is first compressed and expanded, and has a large expansion ratio, which can be significantly enhanced. Silencing ability of low frequency noise.
  • the present invention also provides an automobile which uses the above-mentioned silencer and has low frequency noise.
  • the present invention provides the following technical solutions:
  • a muffler comprising:
  • a barrel body the two ends of the barrel body are respectively provided with a muffler end cover, one of the muffler end caps is provided with an air inlet, and the other of the muffler end caps is provided with an air outlet;
  • the muffler cotton is disposed in the barrel;
  • the muffler tube is embedded in the muffler cotton;
  • the muffling pipe includes a first straight cylinder section, a funnel section and a second straight cylinder section which are sequentially connected, and the diameter of the second straight cylinder section is smaller than the first straight cylinder a segment; the diameter of the funnel segment gradually decreases in a direction from the first straight segment to the second straight segment;
  • the muffler tubes are two, and the second straight barrel segments of the two muffler pipes communicate with each other and form a muffling passage; a first straight cylinder segment of one of the muffler pipes is inserted into the air inlet port, and the other The first straight section of the muffler tube is inserted into the air outlet.
  • the axes of the first straight section, the funnel section and the second straight section of the muffler tube are the same straight line.
  • the axes of the second straight sections of the two muffler tubes coincide.
  • connection between the funnel section and the second straight section is chamfered; the connection of the funnel section and the first straight section is chamfered.
  • the funnel section is provided with a plurality of through holes.
  • the muffler cotton is embedded in the cavity formed by the barrel and the two muffing end caps.
  • the muffler cotton is of a unitary structure, and the surface of the muffler cotton is provided with a uniformly distributed rounded protrusion.
  • An automobile comprising a muffler, the muffler being the muffler according to any one of the above aspects.
  • the invention provides a muffler comprising a barrel body, a muffler cotton and a silencer tube; the two ends of the barrel body are respectively provided with a muffler end cover, one muffler end cover is provided with an air inlet, and the other muffler end cover is provided with The air outlet; the sound-absorbing cotton is disposed in the barrel; the sound-absorbing tube is embedded in the sound-absorbing cotton; the sound-absorbing tube includes a first straight barrel section, a funnel section and a second straight section which are sequentially connected, and the diameter of the second straight section is smaller than the first straight section; the funnel The diameter of the segment gradually decreases along the direction from the first straight section to the second straight section; wherein the silence tube is two, and the second straight sections of the two silencer tubes are connected to each other to form a silencing passage; the first straight section of the silencer tube Inserted into the air inlet, the first straight section of the other silencer tube is inserted into the air outlet.
  • the second straight cylinder segments of the two muffler pipes are connected to each other to form a muffling passage
  • the muffling passage includes a funnel segment of the first muffler pipe, a second straight segment of the two muffler passages, and another
  • the funnel section of the muffler tube is firstly reduced in diameter and then enlarged, so that the airflow enters the muffler channel and then expands and then expands, and has a large expansion ratio, which can significantly enhance the silencing ability of low frequency noise.
  • the first straight section of the two muffler tubes has a large aperture, which is convenient to be combined with the exhaust pipe of the whole vehicle, and avoids excessive increase of the exhaust back pressure to ensure the economy of the internal combustion engine.
  • the muffler provided by the present invention has a large internal volume, ensuring that the muffler volume is sufficiently large.
  • the invention provides an automobile comprising a silencer, wherein the silencer is the above-mentioned silencer, and has the effect of low frequency noise.
  • FIG. 1 is a schematic structural view of a muffler in the prior art
  • FIG. 2 is an exploded view of a silencer according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a silencer according to an embodiment of the present invention.
  • FIG. 4 is a cross-sectional view of a muffler according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural view of a smooth protrusion of a sound-absorbing cotton according to an embodiment of the present invention.
  • Silencer tube 101 Silencer tube 101; muffler end cap 102; barrel 103; muffler cotton 104; rounded protrusion 141.
  • the embodiment of the invention discloses a silencer, wherein the aperture of the silencing channel is firstly reduced and then increased, so that the airflow enters the silencing channel and then expands and then expands, has a large expansion ratio, and can significantly enhance low frequency noise. Silencing ability.
  • the embodiment of the invention also discloses an automobile, which uses the above-mentioned silencer, and has low frequency noise.
  • an embodiment of the present invention provides a muffler including a barrel 103, a muffler cotton 104, and a muffler tube 101. Both ends of the barrel 103 are respectively provided with a muffler end cover 102 and a muffler end cover. An air inlet is provided on 102, and an air outlet is arranged on the other sound-absorbing end cover 102.
  • the sound-absorbing cotton 104 is disposed in the barrel 103; the sound-absorbing tube 101 is embedded in the sound-absorbing cotton 104; the sound-absorbing tube 101 includes a first straight tube that is sequentially connected.
  • the silencer tube 101 is two
  • the second straight sections of the two muffler tubes 101 are connected to each other to form a muffling passage; the first straight section of one muffling pipe 101 is inserted into the air inlet, and the first straight section of the other muffling pipe 101 is inserted into the air outlet.
  • the second straight cylinder segments of the two muffling tubes 101 are connected to each other to form a muffling passage, and the muffling passage includes a funnel segment of the first muffler 101 and a second straight segment of the two muffler channels.
  • the funnel section of the other muffler tube 101 the aperture is first reduced and then increased, so that the airflow enters the muffler channel and then compresses and expands, which has a large expansion ratio, and can significantly enhance the silencing ability of the low frequency noise.
  • the first straight section of the two muffling tubes 101 has a large aperture, which is convenient for combined docking with the exhaust pipe of the automobile, and avoids excessive increase of the exhaust back pressure to ensure the economy of the internal combustion engine.
  • the muffler provided by the present invention has a large internal volume, ensuring that the muffler volume is sufficiently large.
  • the two muffler tubes 101 are assembled and combined to form a muffling channel, which can reduce the manufacturing difficulty and improve the production efficiency.
  • the axes of the first straight section, the funnel section and the second straight section of each of the muffling tubes 101 are the same straight line.
  • the first straight section, the funnel section and the second straight section are all of a unitary structure.
  • the axes of the second straight sections of the two silencing tubes 101 coincide with each other to ensure smooth and smooth airflow when passing through the muffler.
  • connection between the funnel section and the second straight section is chamfered, and the connection between the funnel section and the first straight section is also chamfered to prevent stress concentration and reduce mechanical damage of the muffler 101.
  • the funnel section is provided with a plurality of through holes, which can enhance the absorption of noise.
  • the muffler cotton 104 is embedded in the cavity formed by the barrel 103 and the two muffing end covers 102.
  • the muffler cotton 104 is of a unitary structure, and the surface of the muffler cotton 104 is provided with a uniformly distributed rounded protrusion 141.
  • a uniform smooth protrusion 141 is distributed outside, which can effectively improve the contact area between the muffler cotton 104 and the exhaust gas, thereby improving the absorption of the muffler by the middle and high frequency noise.
  • the muffler cotton 104 is an in-line structure of the barrel 103, and has an integral design, which can largely avoid the aging deterioration of the muffling ability and long service life.
  • the muffler has a high muffling value and a wide muffling frequency range, and has a sufficient amount of muffling in the required muffling frequency range to meet the noise requirements of the whole vehicle.
  • the muffler provided by the embodiment has low production cost, simple process and convenient mass production. Moreover, the silencer is smaller than similar products and can meet more demanding vehicle layout requirements. Further, the muffler has high mechanical strength and long durability.
  • An embodiment of the present invention further provides an automobile including a muffler, wherein the muffler is the muffler provided by the above embodiment, and has the effect of low frequency noise.
  • the automobile provided in this embodiment further has other effects related to the silencer provided by the foregoing embodiments, and details are not described herein again.

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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)

Abstract

一种消音器，包括桶体(103)、消音棉(104)和消音管(101)；桶体(103)两端分别设有消音端盖(102)，两消音端盖(102)上分别设有进气口和出气口；消音棉(104)设置在桶体(103)内；消音管(101)嵌在消音棉(104)内；消音管(101)包括依次连通的第一直筒段、漏斗段和第二直筒段，第二直筒段的直径小于第一直筒段；漏斗段的直径由第一直筒段到第二直筒段逐渐减小；消音管(101)为两个，两者的第二直筒段连通形成消音通道；一个消音管(101)的第一直筒段插装于进气口，另一个消音管(101)的第一直筒段插装于出气口。该消音器中，消音通道的孔径先减小后增大，使气流进入消音通道后先压缩后扩张，具有较大的扩张比，对低频噪声的消音能力强。一种应用上述消音器的汽车，具有低频噪音小的效果。

Description

消音器和汽车 技术领域
本申请要求于2018年05月17日提交中国专利局、申请号为201810474093.X和201820739662.4、发明名称为“消音器和汽车”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及机械工业技术领域，更具体地说，涉及一种消音器，还涉及一种应用上述消音器的汽车。
背景技术
汽车的消音器是阻碍声音传播而让气流通过的、防治气流动力性噪声的专用设备。
请参阅图1，现有的汽车消音器包括桶体和设置在桶体内壁处的消声纤维12，桶体的一侧设有为进气口，另一侧设有出气口，且桶体内设有两个挡板11。消音器进出气口由于受整车排气管路布置影响，直径大小与桶身的直径差别不大，导致扩张比不足，低频噪声的消音效果不明显。
另外，上述汽车消音器的双挡板设计在一定程度上也影响了消音器内部腔体的体积，导致消音容积不足。
再者，上述消音纤维采用丝状结构，其在尿素及水汽的综合作用下容易出现纤维板结的问题，老化速度过快，导致中高频噪声的消音能力也出现明显的恶化，耐久性不足。
综上所述，如何提供一种消音器，以提高其对低频噪声的消音效果，以及如何提供一种应用上述消音器的汽车，是本领域技术人员亟待解决的问题。
发明内容
有鉴于此，本发明提供用于一种消音器，其消音通道的孔径呈先减小后增大的形状，使气流进入消音通道后先压缩后扩张，具有较大的扩张比，能够显著增强低频噪声的消音能力。本发明还提供一种汽车，其应用了上述消音器，低频噪音小。
为实现上述目的，本发明提供如下技术方案：
一种消音器，包括：
桶体，所述桶体的两端分别设有消音端盖，一个所述消音端盖上设有进气口，另一个所述消音端盖上设有出气口；
消音棉，所述消音棉设置在所述桶体内；
消音管，所述消音管嵌在所述消音棉内；所述消音管包括依次连通的第一直筒段、漏斗段和第二直筒段，所述第二直筒段的直径小于所述第一直筒段；所述漏斗段的直径沿所述第一直筒段到所述第二直筒段的方向逐渐减小；
其中，所述消音管为两个，两所述消音管的第二直筒段相互连通并形成消音通道；一个所述消音管的第一直筒段插装于所述进气口，另一个所述消音管的第一直筒段插装于所述出气口。
优选的，上述消音器中，所述消音管中第一直筒段、所述漏斗段和所述第二直筒段三者的轴线为同一条直线。
优选的，上述消音器中，两个所述消音管的所述第二直筒段的轴线重合。
优选的，上述消音器中，所述漏斗段和所述第二直筒段的连接处设有倒角；所述漏斗段和所述第一直筒段的连接处设有倒角。
优选的，上述消音器中，所述漏斗段设有多个透孔。
优选的，上述消音器中，所述消音棉嵌在所述桶体和两个所述消音端盖组成的腔体内。
优选的，上述消音器中，所述消音棉为一体式结构，且所述消音棉的表面设有均匀分布的圆滑突起。
一种汽车，包括消音器，所述消音器为上述技术方案中任意一项所述的消音器。
本发明提供一种消音器，其包括桶体、消音棉和消音管；桶体的两端分别设有消音端盖，一个消音端盖上设有进气口，另一个消音端盖上设有出气口；消音棉设置在桶体内；消音管嵌在消音棉内；消音管包括依次连通的第一直筒段、漏斗段和第二直筒段，第二直筒段的直径小于第一直筒段；漏斗段的直径沿第一直筒段到第二直筒段的方向逐渐减小；其中，消音管为两个，两消音管的第二直筒段相互连通组装形成消音通道；一个消音管的第一直筒段插装于进气口，另一个消音管的第一直筒段插装于出气口。
本发明提供的消音器中，两个消音管的第二直筒段相互连通组装，形成消音通道，消音通道包括第一个消音管的漏斗段、两个消音通道的第二直筒段，以及另一个消音管的漏斗段，其孔径先减小后增大，使气流进入消音通道后先压缩后扩张，具有较大的扩张比，能够显著增强对低频噪声的消音能力。
同时，上述消音器中，两个消音管的第一直筒段孔径较大，便于与汽车整车排气管进行组合对接，同时避免排气背压过分增大，保证内燃机的经济性。
另外，相比于现有技术中双挡板设计的消音器，本发明提供的消音器的内部体积大，确保消音容积足够大。
本发明提供一种汽车，其包括消音器，消音器为上述消音器，具有低频噪音小的效果。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为现有技术中消音器的结构示意图；
图2为本发明实施例提供的消音器的爆炸图；
图3为本发明实施例提供的消音器的结构示意图；
图4为本发明实施例提供的消音器的剖视图；
图5为本发明实施例提供的消音棉的圆滑突起的结构示意图；
其中，图2-图5中：
消音管101；消音端盖102；桶体103；消音棉104；圆滑突起141。
具体实施方式
本发明实施例公开了一种消音器，其消音通道的孔径呈先减小后增大的形状，使气流进入消音通道后先压缩后扩张，具有较大的扩张比，能够显著增强低频噪声的消音能力。本发明实施例还公开了一种汽车，其应用了上述消音器，低频噪音小。
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
请参阅图2-图5，本发明实施例提供一种消音器，其包括桶体103、消音棉104和消音管101；桶体103的两端分别设有消音端盖102，一个消音端盖102上设有进气口，另一个消音端盖102上设有出气口；消音棉104设置在桶体103内；消音管101嵌在消音棉104内；消音管101包括依次连通的第一直筒段、漏斗段和第二直筒段，第二直筒段的直径小于第一直筒段；漏斗段的直径沿第一直筒段到第二直筒段的方向逐渐减小；其中，消音管101为两个，两消音管101的第二直筒段相互连通组装形成消音通道；一个消音管101的第一直筒段插装于进气口，另一个消音管101的第一直筒段插装于出气口。
本发明实施例提供的消音器中，两个消音管101的第二直筒段相互连通组装，形成消音通道，消音通道包括第一个消音管101的漏斗段、两个消音通道的第二直筒段，以及另一个消音管101的漏斗段，其孔径先减小后增大，使气流进入消音通道后先压缩后扩张，具有较大的扩张比，能够显著增强对低频噪声的消音能力。
同时，上述消音器中，两个消音管101的第一直筒段孔径较大，便于与汽车整车排气管进行组合对接，同时避免排气背压过分增大，保证内燃机的经济性。
另外，相比于现有技术中双挡板设计的消音器，本发明提供的消音器的内部体积大，确保消音容积足够大。
再者，上述消音器中，两个消音管101拼装组合形成消音通道，能够降低工艺制造难度，提高生产效率。
上述消音器中，每个消音管101的第一直筒段、漏斗段和第二直筒段三者的轴线为同一条直线。上述第一直筒段、漏斗段和第二直筒段三者为一体式结构。
具体的，上述两个消音管101的第二直筒段的轴线相互重合，确保气流经由该消音器时顺畅、平稳。
每个消音管101中，漏斗段和第二直筒段的连接处设有倒角，漏斗段和第一直筒段的连接处亦设有倒角，既防止应力集中，降低消音管101发生机械损坏的可能性，又可以平顺气流，降低气体流动阻力，避免产生次级噪声。
上述消音器中，漏斗段设有多个透孔，能够增强对噪声的吸收能力。
如上消音器中，消音棉104嵌在桶体103和两个消音端盖102组成的腔体内。消音棉104为一体式结构，且消音棉104的表面设有均匀分布的圆滑突起141。
本实施例提供的消音器中，外部分布有均匀的圆滑突起141，可以有效提高消音棉104与废气的接触面积，从而提高消音器对于中高频噪音的吸收。另外，消音棉104为桶体103内嵌式结构，且为整体式设计，能够最大程度地避免其消音能力的老化减弱，使用寿命长。
该消音器具有较高的消声值和较宽的消声频率范围，在所需的消声频率范围内有足够大的消声量，满足整车对噪声的要求。
本实施例提供的消音器生产成本低，工艺简单，便于批量化生产。再者，该消音器的体积较同类产品更小，可以满足更苛刻的整车布置要求。并且，上述消音器的机械强度高，耐久寿命长。
本发明实施例还提供一种汽车，其包括消音器，其中，消音器为上述实施例提供的消音器，具有低频噪音小的效果。当然，本实施例提供的汽车还具有上述实施例提供的有关消音器的其它效果，在此不再赘述。
本说明书中各个实施例采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似部分互相参见即可。
对所公开的实施例的上述说明，使本领域专业技术人员能够实现或使用本发明。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的，本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下，在其它实施例中实现。因此，本发明将不会被限制于本文所示的这些实施例，而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。

Claims (8)

  1. 一种消音器，其特征在于，包括：
    桶体，所述桶体的两端分别设有消音端盖，一个所述消音端盖上设有进气口，另一个所述消音端盖上设有出气口；
    消音棉，所述消音棉设置在所述桶体内；
    消音管，所述消音管嵌在所述消音棉内；所述消音管包括依次连通的第一直筒段、漏斗段和第二直筒段，所述第二直筒段的直径小于所述第一直筒段；所述漏斗段的直径沿所述第一直筒段到所述第二直筒段的方向逐渐减小；
    其中，所述消音管为两个，两所述消音管的第二直筒段相互连通并形成消音通道；一个所述消音管的第一直筒段插装于所述进气口，另一个所述消音管的第一直筒段插装于所述出气口。
  2. 根据权利要求1所述的消音器，其特征在于，所述消音管中第一直筒段、所述漏斗段和所述第二直筒段三者的轴线为同一条直线。
  3. 根据权利要求1或2所述的消音器，其特征在于，两个所述消音管的所述第二直筒段的轴线重合。
  4. 根据权利要求1所述的消音器，其特征在于，所述漏斗段和所述第二直筒段的连接处设有倒角；所述漏斗段和所述第一直筒段的连接处设有倒角。
  5. 根据权利要求1所述的消音器，其特征在于，所述漏斗段设有多个透孔。
  6. 根据权利要求1所述的消音器，其特征在于，所述消音棉嵌在所述桶体和两个所述消音端盖组成的腔体内。
  7. 根据权利要求1所述的消音器，其特征在于，所述消音棉为一体式结构，且所述消音棉的表面设有均匀分布的圆滑突起。
  8. 一种汽车，包括消音器，其特征在于，所述消音器为权利要力1-7任意一项所述的消音器。
PCT/CN2018/110782 2018-05-17 2018-10-18 消音器和汽车 WO2019218589A1 (zh)

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GB704329A (en) * 1950-08-29 1954-02-17 Lathom Engineering Company Ltd Improvements in silencers for gaseous currents
FR1253748A (fr) * 1959-04-10 1961-02-10 Sulzer Ag Résonateur
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