阅读说明：本技术 一种发动机消音装置 (Engine silencing device ) 是由 璧典寒 赵亮 于 2020-05-15 设计创作，主要内容包括：本发明公开了一种发动机消音装置,包括壳体、内插管和隔板,其特征在于,壳体为密封结构,内插管设置于壳体内部,内插管包括回流管和排气管；壳体底部设置有进气管,壳体顶部设置有排气管；隔板为两块并设置于壳体内部,隔板沿壳体横截面将壳体由上至下隔离成密闭的上腔室、中腔室和下腔室三个空间,进气管连通下腔室,排气管连通中腔室；还包括设置于壳体内部的通气管和回流管,通气管连通上腔室和下腔室,回流管连通上腔室和中腔室；本发明采用迷宫式三节扩张式抗性消音器结构,对各频率段噪声进行针对性的降低,且结构简单,压损小,消音效果好。(The invention discloses an engine silencing device, which comprises a shell, an inner inserting pipe and a partition plate, and is characterized in that the shell is of a sealing structure, the inner inserting pipe is arranged in the shell, and the inner inserting pipe comprises a return pipe and an exhaust pipe; the bottom of the shell is provided with an air inlet pipe, and the top of the shell is provided with an air outlet pipe; the two partition plates are arranged in the shell, the shell is partitioned into three spaces of an upper cavity, a middle cavity and a lower cavity from top to bottom by the partition plates along the cross section of the shell, the air inlet pipe is communicated with the lower cavity, and the air outlet pipe is communicated with the middle cavity; the upper cavity chamber and the lower cavity chamber are communicated through the vent pipe; the invention adopts a labyrinth three-section expanding type resistance silencer structure to pertinently reduce the noise of each frequency section, and has simple structure, small pressure loss and good silencing effect.)

1. An engine silencer assembly, comprising: the device comprises a shell (5), an inner inserting pipe and a partition plate (9), and is characterized in that the shell (5) is of a sealing structure, the inner inserting pipe is arranged inside the shell (5), and the inner inserting pipe comprises a return pipe (4) and an exhaust pipe (8); the bottom of the shell (5) is provided with an air inlet pipe (2), and the top of the shell (5) is provided with an air outlet pipe (8); the two partition plates (9) are arranged in the shell, the shell (5) is partitioned into three spaces of an upper closed cavity, a middle closed cavity and a lower closed cavity by the partition plates (9) along the cross section of the shell (5), the air inlet pipe (2) is communicated with the lower closed cavity, and the air outlet pipe (8) is communicated with the middle closed cavity; the device also comprises a vent pipe (3) and a return pipe (4) which are arranged in the shell (5), wherein the vent pipe (3) is communicated with the upper chamber and the lower chamber, and the return pipe (4) is communicated with the upper chamber and the middle chamber; the inner insertion tube is of an adjustable structure, and the noise of different frequencies is eliminated by adjusting the lengths of the inner insertion tubes in three spaces; the engine combustion exhaust gas enters the lower chamber from the air inlet pipe (2), enters the upper chamber through the vent pipe (3), then enters the middle chamber from the return pipe (4), and finally is discharged through the exhaust pipe (8).

2. The engine muffler according to claim 1, characterized in that the cross section of the housing (5) is an oval or round or square sealed cylindrical stainless steel structure.

3. The engine muffler of claim 1, wherein the inner insert is a resistive structure; the lower chamber of the shell (5) is used for eliminating low-frequency noise of 100-200 Hz, and the middle chamber of the shell (5) eliminates medium-frequency noise of different frequencies by adjusting the length of the inner insertion tube; the vent pipe (3) and the return pipe (4) in the upper chamber are in the form of damping pipes and are used for eliminating medium and high frequency gas flow noise.

4. An engine sound-deadening device according to claim 1, characterized in that the upper portion of the housing (5) is further provided with a lifting lug (6) for mounting, seating, the housing (5).

5. The engine silencer assembly of claim 1, wherein the top of the exhaust pipe (8) is provided with a rain cap (7) for preventing rainwater from entering the inside of the housing (5).

6. The engine silencer according to claim 1, characterized in that the bracket (1) is further arranged at the bottom of the housing (5), and the housing (5) is vertically or horizontally mounted.

Technical Field

The invention relates to the technical field of noise control of a generator set, in particular to an engine silencing device.

Background

With the national emphasis on energy and environment, the trend of generating electricity by using waste gas (gas, methane, industrial tail gas) and the like is a trend, gas generator sets are greatly developed, and the control on the noise of the generator sets is more and more strict, wherein the control on the exhaust noise of an engine is the main content. The existing unit silencer adopts a cylindrical structure, the volume distribution is unreasonable, the frequency is not selective, the length of an inner inserting pipe is not regular, the resistance is large, the low-frequency noise elimination effect is poor, and the total volume is small.

Disclosure of Invention

In order to solve the problems, the invention provides an engine silencing device which adopts a labyrinth three-section expanding type resistance silencer structure to purposefully reduce noise of each frequency section and has the advantages of simple structure, small pressure loss and good silencing effect.

In order to achieve the purpose, the invention adopts the following technical scheme:

the engine silencing device comprises a shell, an inner inserting pipe and a partition plate, and is characterized in that the shell is of a sealing structure, the inner inserting pipe is arranged inside the shell, and the inner inserting pipe comprises a return pipe and an exhaust pipe; the bottom of the shell is provided with an air inlet pipe, and the top of the shell is provided with an air outlet pipe; the two partition plates are arranged in the shell, the shell is partitioned into three spaces of an upper cavity, a middle cavity and a lower cavity from top to bottom by the partition plates along the cross section of the shell, the air inlet pipe is communicated with the lower cavity, and the air outlet pipe is communicated with the middle cavity; the upper cavity chamber and the lower cavity chamber are communicated through the vent pipe; the inner insertion tube is of an adjustable structure, and the noise of different frequencies is eliminated by adjusting the lengths of the inner insertion tubes in three spaces; the engine combustion exhaust gas enters the lower chamber from the air inlet pipe, enters the upper chamber through the vent pipe, then enters the middle chamber from the return pipe, and finally is discharged through the exhaust pipe.

Preferably, the cross section of the shell is an oval or round or square sealed cylindrical stainless steel structure.

Preferably, the inner cannula is a resistant structure; the lower cavity of the shell is used for eliminating low-frequency noise of 100-200 Hz, and the middle cavity of the shell eliminates medium-frequency noise of different frequencies by adjusting the length of the inner insertion tube; the vent pipe and the return pipe in the upper chamber are in the form of damping pipes and are used for eliminating the gas flow noise of medium and high frequency.

Preferably, the upper part of the shell is also provided with a lifting lug for installing and positioning the shell.

Preferably, the top of the exhaust pipe is provided with a rain-proof cap for preventing rainwater from entering the shell.

Preferably, the bottom of the shell is also provided with a support, and the shell is mounted in a vertical mounting mode or a horizontal mounting mode.

The beneficial effects produced by adopting the invention are as follows:

1. the invention aims at the noise of low, medium and high frequency bands to carry out targeted reduction, and the whole noise reduction effect is good.

2. The invention has simple structure and small airflow resistance.

3. The invention has flexible arrangement form, and can be arranged vertically or horizontally.

Drawings

Fig. 1 is a schematic view of the structural principle of the present invention.

FIG. 2 is a schematic view of an inner cannula according to the present invention;

FIG. 3 is a schematic cross-sectional view of the present invention.

In the figure:

1-a scaffold; 2-an air inlet; 3-a breather pipe; 4-a return pipe; 5-a shell; 6-lifting lugs; 7-rain hat; 8-an exhaust port; 9-a separator.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 to 3, the engine silencer of the present invention includes a housing 5, an inner pipe and a partition 9, and is characterized in that the housing 5 is a sealed structure, the inner pipe is disposed inside the housing 5, and the inner pipe includes a return pipe 4 and an exhaust pipe 8; the bottom of the shell 5 is provided with an air inlet pipe 2, and the top of the shell 5 is provided with an exhaust pipe 8; the two partition plates 9 are arranged in the shell, the shell 5 is partitioned into three spaces of an upper cavity, a middle cavity and a lower cavity from top to bottom by the partition plates 9 along the cross section of the shell 5, the air inlet pipe 2 is communicated with the lower cavity, and the air outlet pipe 8 is communicated with the middle cavity; the device also comprises a vent pipe 3 and a return pipe 4 which are arranged in the shell 5, wherein the vent pipe 3 is communicated with the upper chamber and the lower chamber, and the return pipe 4 is communicated with the upper chamber and the middle chamber; the inner insertion tube is of an adjustable structure, and the noise of different frequencies is eliminated by adjusting the lengths of the inner insertion tubes in three spaces; the gas discharged by the engine combustion enters the lower chamber from the gas inlet pipe 2, enters the upper chamber through the vent pipe 3, then enters the middle chamber from the return pipe 4, and finally is discharged through the exhaust pipe 8.

The cross section of the shell 5 is an oval or round or square sealed cylindrical stainless steel structure. The shape of the preferred shell 5 is oval, the overall structure is a labyrinth three-section expansion structure and is divided into an upper cavity, a middle cavity and a lower cavity, and the material is stainless steel

The inner intubation is a resistant structure; the lower chamber of the shell 5 is used for eliminating low-frequency noise of 100-200 Hz, and the middle chamber of the shell 5 eliminates medium-frequency noise of different frequencies by adjusting the length of the inner plug; the vent pipe 3 and the return pipe 4 in the upper chamber are in the form of damping pipes and are used for eliminating the gas flow noise of medium and high frequency.

The upper part of the housing 5 is also provided with lifting lugs 6 for mounting, in place, the housing 5.

The top of the exhaust pipe 8 is provided with a rain-proof cap 7 for preventing rainwater from entering the shell 5.

The bottom of the shell 5 is also provided with a bracket 1, and the shell 5 is vertically or horizontally mounted.

The engine silencing device disclosed by the invention adopts a labyrinth three-section expanding type resistance silencer structure, and performs targeted elimination on high, medium and low three-section frequency noise, so that the silencing effect is good. The device has the advantages of simple structure, small pressure loss, economical and reliable use and the like.

Compared with the prior art, the invention has the following advantages: the invention reduces the noise of low, middle and high frequency sections, has good integral noise reduction effect, simple structure, small airflow resistance and flexible arrangement form, and can be arranged vertically or horizontally.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. For example, the silencer can be placed vertically or horizontally. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.