TWM525391U - Improved structure of muffler - Google Patents

Description

Muffler improved structure

An improved structure of a muffler, especially a muffler having a sound absorbing material on an inner wall, and a spoiler blade and a reflecting body capable of reflecting airflow and absorbing noise, respectively, for changing airflow and absorbing noise to reduce Improved structure for noise generation.

According to the general muffler, the outer tube is placed in the inner straight tube, and the inner straight tube is located in the covered portion inside the outer tube, and a plurality of vent holes are formed, and the outer straight tube is covered with the outer edge of the segment. The sound absorbing chamber formed inside the outer covering tube is filled with the sound absorbing material, so that the air flow in the inner straight tube generates expansion by a plurality of vent holes, reduces the exhaust pressure, and absorbs the exhaust sound by the sound absorbing material filled in the sound absorbing chamber. However, the purpose of the muffler is achieved. However, the muffler has a simple and smooth path of the airflow, and only relies on the vent hole to perform the action of reducing noise, resulting in a problem of poor noise absorption capability.

Therefore, how to solve the above-mentioned problems and shortcomings is the subject of research and development that the relevant industry is eager to develop.

The main purpose of the present invention is to use a fan-shaped reflector body with a tapered front surface to be disposed on the flow path of the airflow before and after, so that the swirling of the fan blade is diffused, and the front surface of the reflective reflector body is tapered. The reflection effect and the absorption of the sound absorbing material in the reflection cavity effectively reduce the noise generated by the flow of the airflow.

In order to achieve the above object, the improved structure of the silencer of the present invention is provided with a body having a casing filled with a sound absorbing material, and an inner wall of the casing defines a chamber transversely penetrating the two sides of the body, and the chamber Air inlets are formed on the front and rear sides respectively The air outlet has a plurality of guiding holes arranged at intervals, and a spoiler and a reflecting device are respectively disposed in the chamber near the air inlet and the air outlet, so that the spoiler and the reflecting device form two sides before and after the chamber The spoiler is provided with a first bracket on the inner wall of the body, the first bracket is provided with a shaft, the shaft is provided with a fan blade, and the reflecting device is provided with a second bracket and a reflecting seat, and the second bracket has two ends They are respectively fixed on the inner wall of the body and the reflection seat, and the reflection seat has a hollow seat body, the seat body is filled with the sound absorbing material, the surface of the seat body has a plurality of through holes arranged at intervals, and the seat body is close to the side surface of the air inlet port. It is inclined, and the base body is provided with a bottom plate on the side close to the air outlet.

According to the above technical means, when the gas flows through the chamber, the gas generated by the gas will push the blade to swirl, so that the airflow flowing through the chamber reduces the noise due to the diffusion effect generated by the blade. And the vibration energy of the airflow propagating sound is absorbed by the sound absorbing material filled in the casing to reduce the noise decibel, and the airflow passes through the seat body of the reflection seat, and then diffuses into the cavity due to reflection of the front side surface of the inclined seat body, thereby reducing noise. Occurs, and the sound absorbing material filled in the body absorbs the vibration energy of the airflow and reduces the noise decibel.

1‧‧‧ Ontology

11‧‧‧Shell

111‧‧‧ inner wall

112‧‧‧ Guide hole

12‧‧‧Acoustic materials

13‧‧‧ chamber

131‧‧‧Air inlet

132‧‧‧air outlet

2‧‧‧ spoiler

21‧‧‧First bracket

22‧‧‧ shaft

23‧‧‧ fan leaves

24‧‧‧ bearing

3‧‧‧Reflecting device

31‧‧‧second bracket

32‧‧‧reflector

321‧‧‧ body

322‧‧‧through hole

33‧‧‧Acoustic materials

34‧‧‧floor

The first figure is a three-dimensional appearance of the preferred embodiment of the present creation.

The second drawing is a side cross-sectional view of the preferred embodiment of the present invention.

The third figure is a schematic diagram of the implementation state of the preferred embodiment of the present creation.

Referring to the first figure and the second figure, it can be clearly seen from the figure that the preferred embodiment of the improved structure of the muffler of the present invention has a body 1 which is separately provided in front and rear to reduce noise occurrence. The spoiler 2 and the reflecting device 3, wherein the body 1 has a housing 11 filled with a sound absorbing material 12, and the inner wall 111 of the housing 11 defines a chamber laterally penetrating the two sides of the body 1. 13. The front and rear sides of the chamber 13 are respectively formed with an air inlet 131 and an air outlet 132, and the inner wall 111 has a surface. Guide holes 112 are provided at a plurality of intervals.

The spoiler 2 is adjacent to the air inlet 131 of the chamber 13 and is provided with a first bracket 21 on the inner wall 111 of the body 1. The first bracket 21 is provided with a shaft 22, and the first bracket 21 and the shaft A bearing 24 is disposed between the rods 22, and a fan blade 23 is disposed on the shaft 22.

The reflection device 3 is adjacent to the air outlet 132 of the chamber 13 and is provided with a second bracket 31 and a reflection seat 32. The two ends of the second bracket 31 are respectively fixed to the inner wall 111 and the reflection seat 32 of the body 1, and the reflection seat 32. The seat body 321 is filled with a sound absorbing material 33, and the surface of the seat body 321 has a plurality of through holes 322 disposed at intervals, and the side surface of the seat body 321 is inclined toward the side surface of the air inlet 131. The base 321 is provided with a bottom plate 34 on the side close to the air outlet 132.

Referring to the third figure, it can be clearly seen from the figure that when the gas flows through the chamber 13, the gas generated by the gas first contacts the blade 23 of the spoiler 2, which will promote the action of the blade 23. The force causes the fan blade 23 and the shaft 22 to rotate according to the bearing 24 on the first bracket 21, so that the airflow flowing through the blade 23 can effectively reduce the noise due to the diffusion of the blade 23; The vibration energy of the airflow propagating sound is also absorbed into the casing 11 through the guide hole 112 during the flow of the airflow through the air passage 12, and is absorbed by the sound absorbing material 12 filled in the casing 11, in this embodiment, The sound absorbing material 12 can be foam, glass fiber, ceramic wool, sound absorbing felt, silicon mixture or rock wool, and the airflow noise is further reduced. Moreover, the airflow noise that directly escapes from the blade 23 of the spoiler 2 is a reflection seat 32 that passes through the reflection device 3 located behind the spoiler 2, and the front surface of the seat 321 of the reflection seat 32 is inclined. The airflow is reflected and diffused into the chamber 13 to reduce the occurrence of noise, and the airflow also enters the seat body 321 through the through hole 322, and absorbs the vibration energy of the airflow propagating sound through the sound absorbing material 33 filled in the seat body 321, In the present embodiment, the sound absorbing material 33 may be foam, glass fiber, ceramic wool, sound absorbing felt, silicon mixture or rock wool, thereby reducing the decibel of airflow noise.

1‧‧‧ Ontology

11‧‧‧Shell

111‧‧‧ inner wall

112‧‧‧ Guide hole

12‧‧‧Acoustic materials

13‧‧‧ chamber

131‧‧‧Air inlet

132‧‧‧air outlet

2‧‧‧ spoiler

21‧‧‧First bracket

22‧‧‧ shaft

23‧‧‧ fan leaves

24‧‧‧ bearing

3‧‧‧Reflecting device

31‧‧‧second bracket

32‧‧‧reflector

321‧‧‧ body

322‧‧‧through hole

33‧‧‧Acoustic materials

34‧‧‧floor

Claims (4)

A muffler improved structure, the muffler is provided with a body, a spoiler and a reflecting device, the body has a casing, the casing is filled with a sound absorbing material, and the inner wall of the casing defines a lateral direction through the two sides of the body. a chamber, an air inlet is formed on a front side of the chamber, an air outlet is formed on the rear side, and a guide hole is disposed at a plurality of intervals on the inner wall surface, and the improvement is that the spoiler is provided with a fan blade in the chamber of the body The fan blade is close to the air inlet of the chamber, and the reflection device is disposed in the chamber of the body with a reflection seat, the reflection seat is close to the air outlet of the chamber, and the reflection seat has a hollow seat body, and the seat body is filled There is a sound absorbing material, the surface of the seat body has a plurality of through holes arranged at intervals, and the side surface of the seat body close to the air inlet is inclined. The improved structure of the muffler according to claim 1, wherein the spoiler is provided with a first bracket, the first bracket is an inner wall of the positioning body, and the first bracket is provided with a shaft, and the blade is disposed On the shaft. The improved structure of the muffler according to claim 1, wherein the reflecting device is provided with a second bracket, and the two ends of the second bracket are respectively fixed to the inner wall of the body and the seat of the reflecting seat, and the seat body is close to A bottom plate is provided on one side of the tuyere. The improved structure of the muffler according to claim 1, wherein the sound absorbing material of the body and the sound absorbing material of the reflecting device may be foam, glass fiber, ceramic wool, sound absorbing felt, silicon mixture or rock wool.