WO2024037333A1 - 发动机消音结构 - Google Patents

发动机消音结构 Download PDF

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Publication number
WO2024037333A1
WO2024037333A1 PCT/CN2023/110561 CN2023110561W WO2024037333A1 WO 2024037333 A1 WO2024037333 A1 WO 2024037333A1 CN 2023110561 W CN2023110561 W CN 2023110561W WO 2024037333 A1 WO2024037333 A1 WO 2024037333A1
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Prior art keywords
silencer
engine
exhaust
silencing
housing
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PCT/CN2023/110561
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English (en)
French (fr)
Inventor
田瑜
黄嘉鸣
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峰飞航空科技(昆山)有限公司
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Publication of WO2024037333A1 publication Critical patent/WO2024037333A1/zh

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Classifications

    • 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

  • This application belongs to the technical field of drone silencing and relates to an engine silencing structure.
  • a cooling cover on the exhaust pipe muffler, and form a volume chamber on the peripheral side of the exhaust pipe of the exhaust passage, and fill the volume chamber with sound absorption.
  • the material reduces the noise generated when the exhaust gas passes through. If the density of the sound-absorbing material is too small, it is not conducive to fully absorbing the noise, making the silencing effect of the silencer exhaust pipe poor. If the density of the sound-absorbing material is too high, it is easy to cause blockage and is inconvenient to clean. It is clogged and the cleaning operation is time-consuming and labor-intensive.
  • the purpose of this application is to provide an engine silencing structure.
  • the engine silencing structure of this application can greatly reduce the intensity of noise, thereby realizing the silencing function of a large gasoline-electric hybrid drone.
  • the present application provides an engine silencer structure.
  • the engine silencer structure includes a casing. One end of the casing is connected to an exhaust pipe of a fuel engine.
  • the casing is provided with at least one exhaust port.
  • the interior of the casing At least two silencer plates and at least one filter plate are provided.
  • Each of the silencer plates is staggered to form a curved silencer exhaust channel, and a filler is provided in the silencer exhaust channel.
  • the exhaust gas enters through the exhaust pipe of the fuel engine.
  • the housing is in turn reflected and guided by the filter plate and the staggered silencer plates to the exhaust port for discharge.
  • the sound-absorbing plate at least includes a diatom mud layer.
  • porous sound-absorbing cotton is provided on the surface of the sound-absorbing plate.
  • the surface of the sound absorbing plate is in the shape of a sawtooth structure.
  • the muffler exhaust channels formed by the staggered arrangement of adjacent muffler plates are in an S shape.
  • the filler in the muffler exhaust channel includes one or more of the following: foam plastic, sponge, asphalt particles, rubber particles or silica gel particles.
  • the size and shape of each of the sound-absorbing panels are the same or different.
  • the housing includes a plurality of exhaust ports.
  • the surfaces of the housing and the muffler plate are both provided with heat insulation layers.
  • the material of the heat insulation layer is asbestos.
  • the engine silencing structure is provided with multiple silencing plates staggered to form a curved silencing exhaust channel, and a filler is provided in the silencing exhaust channel, so that the exhaust gas is reflected multiple times through the curved silencing exhaust channel.
  • the intensity of noise is greatly reduced, thereby realizing the silencer function of large gasoline-electric hybrid drones.
  • Figure 1 is an overall schematic diagram of the engine silencer structure of a fuel engine provided in a specific embodiment of the present application
  • Figure 2 is an external schematic diagram of the engine silencer structure provided in a specific embodiment of the present application.
  • This embodiment provides an engine silencer structure, as shown in Figures 1 and 2, wherein:
  • the engine silencer structure includes a casing 1, which is the skin of the fuselage, and the casing 1 is a hollow structure.
  • the bottom of one side of the casing 1 is connected to the exhaust pipe 4 of the fuel engine, and the top of the other side is provided with two exhaust pipes.
  • the air port 3 and the housing 1 are provided with four silencer plates 2 and a filter plate (not shown in the figure). Each silencer plate 2 is staggered to form an "S" shaped silencer exhaust channel.
  • the exhaust gas is discharged by the fuel engine.
  • the air pipe 4 enters the housing 1 and is reflected and guided by the filter plate and the staggered silencer plates 2 to the exhaust port 3 for discharge.
  • the surface of the sound-absorbing plate at least includes a diatom mud layer, and the diatom mud layer can have a better sound-absorbing effect.
  • porous sound-absorbing cotton is provided on the sound-absorbing board to absorb noise.
  • the engine silencing structure is provided with multiple silencing plates staggered to form a curved silencing exhaust channel, and a filler is provided in the silencing exhaust channel, so that the exhaust gas is reflected multiple times through the curved silencing exhaust channel.
  • the intensity of noise is greatly reduced, thereby realizing the silencer function of large gasoline-electric hybrid drones.
  • the surface of the sound absorbing plate is in the shape of a sawtooth structure.
  • the sawtooth structure can reflect noise more effectively and thereby reduce the noise.
  • this application does not have specific requirements on the size, shape, material and other structural features of the sound absorbing board. and special limitations.
  • the function of the silencer panels in this application is to be staggered inside the housing 1 to form a curved exhaust channel, thereby reducing the intensity of the noise. Therefore, it can be understood that other silencer panels that can achieve such functions are It can be used in this application.
  • Those skilled in the art can adapt the size, shape and material of the sound attenuator according to the usage scenario and test conditions.
  • Each silencer plate 2 is staggered on the inner surface of the housing 1. Furthermore, the size and shape of each silencer plate 2 are the same or different. It should be noted that the distance between the silencer plate 2 and the shell 1 in this application is The connection can be a fixed connection or a movable connection. The purpose is to ensure a curved exhaust channel. Therefore, there is no special limitation on the connection method of the silencer plate 2 and the shell 1. The specific position of the silencer plate 2 inside the shell 1 is not limited. Those skilled in the art can make adaptive adjustments according to actual conditions.
  • the silencing exhaust channels formed by the staggered arrangement of adjacent silencing panels 2 are S-shaped. It should be noted that this application does not have specific requirements or special limitations on the shape of the silencing exhaust channels.
  • the function of the silencing exhaust channels in this application is to The gas entering the housing 1 undergoes multiple deflection reflections to reduce noise.
  • the silencer exhaust channel can be S-shaped. Therefore, it is understood that other shapes of the silencer exhaust channel that can achieve such functions are available.
  • those skilled in the art can adapt the shape of the muffled exhaust channel according to the usage scenario and test conditions.
  • the filler in the silencer exhaust channel is any one of foam, sponge, asphalt particles, rubber particles or silica gel particles or a combination of at least two or more.
  • the casing 1 is a closed casing or an open casing. Furthermore, the casing 1 is a fuselage skin. It should be noted that this application does not impose specific requirements on the size, shape, material and other structural features of the casing 1. Special limitation, housing 1 in this application Its function is to connect the exhaust pipe 4 of the fuel engine to the outside, so that the gas can achieve the purpose of silencing and noise reduction after being arranged inside the casing 1.
  • the casing 1 can be a fully enclosed shell with the exhaust pipe 4 externally provided, and the exhaust pipe 4 is arranged on the surface.
  • Port 3 can also be a hollow shell, with one end connected to the exhaust pipe 4 and the other end being the exhaust port 3. Therefore, it can be understood that other shells 1 that can achieve such functions can be used in this application. Those skilled in the art can adapt the size, shape and material of the housing 1 according to the usage scenario and test conditions.
  • the surfaces of the shell 1 and the muffler panel 2 are both provided with a heat insulation layer.
  • the material of the heat insulation layer is asbestos. It should be noted that this application does not have specific requirements on the size, shape, material and other structural characteristics of the heat insulation layer. and special limitation.
  • the role of the heat insulation layer in this application is to be provided on the surface of the housing 1 and the silencer plate 2 to prevent high-temperature gas from damaging the inner wall of the housing 1 and the silencer plate 2.
  • the heat insulation layer is made of asbestos. , because asbestos is used as a material or lining for transmission, heat preservation, heat insulation, insulation, sealing and other components, the cost is low and the availability is high. Therefore, it is understandable that other insulation layers that can achieve such functions can be used In this application, those skilled in the art can make adaptive adjustments to the size, shape and material of the thermal insulation layer according to the usage scenario and test conditions.

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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

一种发动机消音结构，包括壳体（1），壳体（1）的一端连接燃油机排气管（4），壳体（1）上设置有至少一个排气口（3），壳体（1）内部设置有至少两个消音板（2）和至少一个过滤板，每个消音板（2）交错排列形成弯曲的消音排气通道，且消音排气通道内设置有填充物，废气由燃油机排气管（4）进入壳体（1），依次经过滤板和交错排列的消音板（2）反射导流至排气口（3）排出。

Description

发动机消音结构
相关申请交叉引用
本专利申请要求于2022年08月17日提交的、申请号为202222165963.X、发明名称为“发动机消音结构”的中国专利申请的优先权，上述申请的全文以引用的方式并入本文中。
技术领域
本申请属于无人机消音技术领域，涉及一种发动机消音结构。
背景技术
为了尽可能的消除无人机发动机排气噪声，主要通过在排气管消音器上安装冷却罩，还有在排气通路的排气管在外周侧形成一个容积室，在容积室中填充吸音材料降低尾气通过时产生的噪音，填充吸音材料的密度过小，则不利于充分吸收噪音，使得消音排气管的消音效果较差，填充吸音材料的密度过大容易产生堵塞，且不便于清理堵塞，清理作业耗时耗力。
发明内容
本申请的目的在于提供一种发动机消音结构，本申请的发动机消音结构将噪声的强度极大的消减，从而实现油电混动大型无人机的消音功能。
为达此目的，本申请采用以下技术方案：
本申请提供了一种发动机消音结构，所述发动机消音结构包括壳体，所述壳体的一端连接燃油机排气管，所述壳体上设置有至少一个排气口，所述壳体内部设置有至少两个消音板和至少一个过滤板，每个所述消音板交错排列形成弯曲的消音排气通道，且所述消音排气通道内设置有填充物，废气由燃油机排气管进入所述壳体，依次经所述过滤板和交错排列的所述消音板反射导流至排气口排出。
作为本申请一种优选的技术方案，所述消音板上至少包括硅藻泥层。
作为本申请一种优选的技术方案，所述消音板表面设置有多孔消音棉。
作为本申请一种优选的技术方案，所述消音板表面呈锯齿结构形状。
作为本申请一种优选的技术方案，相邻所述消音板交错排列形成的消音排气通道呈S型。
作为本申请一种优选的技术方案，所述消音排气通道内的填充物包括以下一种或多种：泡沫塑料、海绵、沥青颗粒、橡胶颗粒或硅胶颗粒。
作为本申请一种优选的技术方案，每个所述消音板的大小和形状相同或不同。
作为本申请一种优选的技术方案，所述壳体包括多个所述排气口。
作为本申请一种优选的技术方案，所述壳体和消音板的表面均设置有隔热层。
作为本申请一种优选的技术方案，所述隔热层的材质为石棉。
与现有技术相比，本申请的有益效果为：
在本申请中，提供的发动机消音结构通过多个消音板交错排列形成弯曲的消音排气通道，并在消音排气通道内设置填充物，使得废气经弯曲的消音排气通道多次反射，将噪声的强度极大的消减，从而实现油电混动大型无人机的消音功能。
附图说明
图1为本申请一个具体实施方式中提供的燃油发动机的发动机消音结构的整体示意图；
图2为本申请一个具体实施方式中提供的发动机消音结构的外部示意图。
具体实施方式
需要理解的是，在本申请的描述中，术语“中心”、“纵向”、“横向”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”等仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”等的特征可以明示或者隐含地包括一个或者更多个该特征。在本申请的描述中，除非另有说明，“多个”的含义是两个或两个以上。
需要说明的是，在本申请的描述中，除非另有明确的规定和限定，术语“设置”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以通过具体情况理解上述术语在本申请中的具体含义。
本领域技术人员理应了解的是，本申请中必然包括用于实现工艺完整的必要管线、常规阀门和通用泵设备，但以上内容不属于本申请的主要发明点，本领域技术人员可以基于工艺流程和设备结构选型可以自行增设布局，本申请对此不做特殊要求和具体限定。
下面结合附图并通过具体实施方式来进一步说明本申请的技术方案。
本实施例提供了一种发动机消音结构，如图1和图2所示，其中：
发动机消音结构包括壳体1，壳体1为机身蒙皮，且壳体1为中空式结构，壳体1的一侧底部连接燃油机排气管4，另一侧顶部设置有两个排气口3，壳体1内部设置有四个消音板2和一个过滤板(图中未示出)，每个消音板2交错排列形成“S”型的消音排气通道，废气由燃油机排气管4进入壳体1，依次经过滤板和交错排列的消音板2反射导流至排气口3排出。排气口3可以为两个以上，此处并不对其进行具体限制。
在一些实施例中，消音板表面至少包括硅藻泥层，硅藻泥层可以较好的消音效果。此外，消音板上设置有多孔消音棉，用于吸收噪音。
在本申请中，提供的发动机消音结构通过多个消音板交错排列形成弯曲的消音排气通道，并在消音排气通道内设置填充物，使得废气经弯曲的消音排气通道多次反射，将噪声的强度极大的消减，从而实现油电混动大型无人机的消音功能。
在一些实施例中，消音板表面呈锯齿结构形状，锯齿结构可以更有效的对噪音进行反射从而降低噪声，需要说明的是，本申请对消音板的尺寸、形状和材质等结构特征不作具体要求和特殊限定，消音板在本申请中的作用是在壳体1内部交错排列，形成弯曲的排气通道，从而削减噪声的强度，因此可以理解的是，其他能实现此类功能的消音板均可用于本申请中，本领域技术人员可以根据使用场景和测试条件对消音板的尺寸、形状和材质进行适应性调整。
每个消音板2交错设置于壳体1的内表面，进一步地，每个消音板2的大小和形状相同或不同，需要说明的是，本申请中的消音板2和壳体1之间的连接可以为固定连接也可以为活动连接，目的是为了保证弯曲的排气通道，因此，对消音板2和壳体1的连接方式不做特殊限定，消音板2在壳体1内部的具体位置本领域技术人员可以根据实际情况进行适应性调整。
相邻消音板2交错排列形成的消音排气通道呈S型，需要说明的是，本申请对消音排气通道的形状不作具体要求和特殊限定，消音排气通道在本申请中的作用是对壳体1内进入的气体进行多次折流反射降噪，示例性地，消音排气通道可以为S型，因此可以理解的是，其他能实现此类功能的消音排气通道的形状均可用于本申请中，本领域技术人员可以根据使用场景和测试条件对消音排气通道的形状进行适应性调整。
消音排气通道内的填充物为泡沫塑料、海绵、沥青颗粒、橡胶颗粒或硅胶颗粒中的任一种或至少两种及以上的组合。
壳体1为封闭式壳体或开放式壳体，进一步地，壳体1为机身蒙皮，需要说明的是，本申请对壳体1的尺寸、形状和材质等结构特征不作具体要求和特殊限定，壳体1在本申请中 的作用是外接燃油机排气管4，使其气体经壳体1内部的设置后达到消音降噪的目的，壳体1可以是全封闭式壳体外接排气管4，表面设置有排气口3，也可以是中空式壳体，一端连接排气管4，另一端为排气口3，因此可以理解的是，其他能实现此类功能的壳体1均可用于本申请中，本领域技术人员可以根据使用场景和测试条件对壳体1的尺寸、形状和材质进行适应性调整。
壳体1和消音板2的表面均设置有隔热层，进一步地，隔热层的材质为石棉，需要说明的是，本申请对隔热层的尺寸、形状和材质等结构特征不作具体要求和特殊限定，隔热层在本申请中的作用是设置于壳体1和消音板2的表面，避免高温气体对壳体1内壁以及消音板2的损坏，示例性地，隔热层采用石棉，因为石棉作为传动、保温、隔热、绝缘、密封等部件的材料或衬料，成本较低，可获得性高，因此可以理解的是，其他能实现此类功能的隔热层均可用于本申请中，本领域技术人员可以根据使用场景和测试条件对隔热层的尺寸、形状和材质进行适应性调整。
申请人声明，以上所述仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，所属技术领域的技术人员应该明了，任何属于本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到的变化或替换，均落在本申请的保护范围和公开范围之内。

Claims (9)

  1. 一种发动机消音结构，其特征在于，包括壳体(1)，所述壳体(1)的一端连接燃油机排气管(4)，所述壳体(1)上设置有至少一个排气口(3)，所述壳体(1)内部设置有至少两个消音板(2)和至少一个过滤板，每个所述消音板(2)交错排列形成弯曲的消音排气通道，且所述消音排气通道内设置有填充物，废气由所述燃油机排气管(4)进入所述壳体(1)，依次经所述过滤板和交错排列的所述消音板(2)反射导流至排气口(3)排出。
  2. 根据权利要求1所述的发动机消音结构，其特征在于，所述消音板(2)上至少包括硅藻泥层。
  3. 根据权利要求1所述的发动机消音结构，其特征在于，所述消音板(2)表面设置有多孔消音棉。
  4. 根据权利要求1所述的发动机消音结构，其特征在于，所述消音板(2)表面呈锯齿结构形状。
  5. 根据权利要求1所述的发动机消音结构，其特征在于，相邻所述消音板(2)交错排列形成的消音排气通道呈S型。
  6. 根据权利要求1所述的发动机消音结构，其特征在于，每个所述消音板(2)的大小和形状相同或不同。
  7. 根据权利要求1所述的发动机消音结构，其特征在于，所述壳体(1)包括多个所述排气口(3)。
  8. 根据权利要求1所述的发动机消音结构，其特征在于，所述壳体(1)和消音板(2)的表面均设置有隔热层。
  9. 根据权利要求8所述的发动机消音结构，其特征在于，所述隔热层的材质为石棉。
PCT/CN2023/110561 2022-08-17 2023-08-01 发动机消音结构 WO2024037333A1 (zh)

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