CN219672706U

CN219672706U - Multi-cavity muffler for gasoline engine

Info

Publication number: CN219672706U
Application number: CN202321198097.2U
Authority: CN
Inventors: 万锋
Original assignee: Yancheng Slong Machinery & Electric Co ltd
Current assignee: Yancheng Slong Machinery & Electric Co ltd
Priority date: 2023-05-18
Filing date: 2023-05-18
Publication date: 2023-09-12
Anticipated expiration: 2033-05-18

Abstract

The utility model discloses a multi-cavity muffler for a gasoline engine, which comprises a shell, wherein a plurality of partition boards are arranged in the shell, the interior of the shell is divided into a plurality of cavities by the partition boards, and the cavities are communicated with one another; the shell is characterized in that an air inlet is formed in one side of the shell and is communicated with a first expansion cavity in the shell, the first expansion cavity is communicated with a second expansion cavity, the second expansion cavity is communicated with a first resonance cavity, the first resonance cavity is communicated with a second resonance cavity, the second resonance cavity is communicated with a third resonance cavity, the third resonance cavity is communicated with a cooling cavity, and the cooling cavity is connected with an air outlet. According to the multi-cavity muffler, the noise caused by the operation of the engine can be remarkably reduced under the action of the plurality of silencing cavities, and the environment is not greatly influenced.

Description

Multi-cavity muffler for gasoline engine

Technical Field

The utility model belongs to the technical field of silencers, and particularly relates to a multi-cavity silencer for a gasoline engine.

Background

With the increasing development of the technological level and the improvement of the living standard of people, various motor vehicles are widely used as a common transportation means in daily life of people, such as widely used motorcycles and automobiles. Because the engine generates relatively large noise due to the power factor, various muffler devices are widely applied to motorcycles and automobiles to achieve the purpose of reducing noise.

A muffler is a device that allows airflow to pass through while attenuating noise, and is one of the important components on motorcycles and automobiles. The performance of the muffler not only affects the noise, but also has larger effects on the performance of the engine such as power, oil consumption, torque and the like. The sound damping principle of the sound damper is to use the proper combination of the cavity and the pipe to generate two functions for sound damping: firstly, utilizing abrupt change of the section of the pipeline (namely, change of acoustic reactance) to reflect sound waves propagating along the pipeline back to the direction of a sound source, so that the sound energy is reflected back to the original place; and secondly, the reflection of a plurality of interfaces is utilized to enable the original first forward-propagating sound wave to return to the original point and return to forward-propagating again, the point is converged with the second forward-propagating sound wave which is not reflected yet, and the two sound waves are equal in amplitude and are different in phase by an odd multiple of 180 degrees, so that mutual interference is eliminated.

The operation of an engine is often accompanied by a large noise pollution, and a muffler is used as a part of the engine to reduce noise generated during exhaust in a high-temperature environment. However, although the existing muffler has a certain noise elimination effect, the noise elimination effect is not obvious and the noise is large.

Disclosure of Invention

The utility model aims to: the utility model aims to solve the defects in the prior art and provides a multi-cavity muffler for a gasoline engine.

The technical scheme is as follows: the utility model relates to a multi-cavity muffler for a gasoline engine, which comprises a shell, wherein a plurality of partition boards are arranged in the shell, the interior of the shell is divided into a plurality of cavities by the partition boards, and the cavities are communicated with one another;

the shell is characterized in that an air inlet is formed in one side of the shell and is communicated with a first expansion cavity in the shell, the first expansion cavity is communicated with a second expansion cavity, the second expansion cavity is communicated with a first resonance cavity, the first resonance cavity is communicated with a second resonance cavity, the second resonance cavity is communicated with a third resonance cavity, the third resonance cavity is communicated with a cooling cavity, and the cooling cavity is connected with an air outlet.

In some embodiments, the first expansion chamber communicates with the second expansion chamber through a first segment of airway tube. The first section of air duct spans the first resonant cavity, and the first resonant cavity is located between the first expansion cavity and the second expansion cavity.

In some embodiments, the second inflation lumen communicates with the first resonance lumen through a vent. The second expansion cavity is adjacent to the two cavities of the first resonant cavity, and the second expansion cavity and the first resonant cavity are mutually communicated through the vent hole.

In some embodiments, the first resonant cavity communicates with the second resonant cavity through a second airway. The first resonant cavity and the second resonant cavity are cavities in different planes, and the first resonant cavity is communicated with the second resonant cavity through a second air duct of the bent pipe structure.

In some embodiments, the second resonant cavity communicates with the third resonant cavity through a third airway. The third air duct spans over the cooling cavity, and the cooling cavity is located between the second resonant cavity and the third resonant cavity.

In some embodiments, the third resonant cavity communicates with the cooling cavity through a second vent. The third resonant cavity is adjacent to the cooling cavity and is communicated with the cooling cavity through the second ventilation hole.

In some embodiments, the inner walls of the first expansion chamber, the second expansion chamber and the first resonant chamber are coated with a sound damping layer.

In some embodiments, the inner wall of the housing is coated with a sound dampening layer. Through the arrangement of the multi-layer silencing layer, the sound of the air outlet can be effectively reduced.

The beneficial effects are that: according to the multi-cavity muffler, the noise caused by the operation of the engine can be remarkably reduced through the plurality of silencing cavities and the silencing layer, and the environment is not greatly influenced.

Drawings

Fig. 1 is a schematic view of a muffler according to an embodiment of the present utility model.

Description of the embodiments

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc. are the directions or positional relationships shown, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The utility model will now be described in further detail by way of specific examples of embodiments in connection with the accompanying drawings.

Examples

As shown in FIG. 1, the multi-cavity muffler for the gasoline engine comprises a shell, wherein a plurality of partition plates are arranged in the shell, the partition plates divide the interior of the shell into a plurality of cavities, and the cavities are mutually communicated.

Specifically, an air inlet 1 is formed in one side of the shell, the air inlet 1 is communicated with a first expansion cavity 2 in the shell, the first expansion cavity 2 is communicated with a second expansion cavity 4, the second expansion cavity 4 is communicated with a first resonant cavity 5, the first resonant cavity 5 is communicated with a second resonant cavity 7, the second resonant cavity 7 is communicated with a third resonant cavity 9, the third resonant cavity 9 is communicated with a cooling cavity 10, and the cooling cavity 10 is connected with an air outlet 11.

According to the utility model, the exhaust gas to be treated enters the muffler through the air inlet, and then passes through the expansion cavity and the resonant cavity for multiple times, so that the required noise elimination purpose is achieved, and the noise is low.

Examples

In this embodiment, as shown in fig. 1, the first expansion chamber 2 communicates with the second expansion chamber 4 through the first-stage gas-guide tube 3. Wherein the first section of air duct 3 spans over the first resonant cavity 5, and the first resonant cavity 5 is located between the first expansion cavity 2 and the second expansion cavity 4.

In this embodiment, as shown in fig. 1, the second expansion chamber 4 communicates with the first resonance chamber 5 through a vent hole. Wherein, the second expansion cavity 4 is adjacent to the first resonant cavity 5, and the second expansion cavity 4 and the first resonant cavity 5 are mutually communicated through the vent hole.

In this embodiment, as shown in fig. 1, the first resonant cavity 5 communicates with the second resonant cavity 7 through the second air duct 6. The first resonant cavity 5 and the second resonant cavity 7 are cavities with different planes, and the first resonant cavity 5 is communicated with the second resonant cavity 7 through a second air duct 6 with a bent pipe structure.

In this embodiment, as shown in fig. 1, the second resonant cavity 7 communicates with the third resonant cavity 9 through a third air duct 8. Wherein the third air duct 8 spans over the cooling chamber 10, the cooling chamber 10 being located between the second resonance chamber 7 and the third resonance chamber 9.

In the present embodiment, as shown in fig. 1, the third resonant cavity 9 communicates with the cooling cavity 10 through a second vent hole. Wherein the third resonant cavity 9 is adjacent to the cooling cavity 10, and the third resonant cavity 9 is communicated with the cooling cavity 10 through a second ventilation hole.

In this embodiment, as shown in fig. 1, the inner walls of the first expansion chamber 2, the second expansion chamber 4 and the first resonant chamber 5 are coated with a silencing layer. Further, the inner wall of the shell (the second resonant cavity 7, the third resonant cavity 9 and the cooling cavity 10) is coated with a silencing layer. Through the arrangement of the two silencing layers, the sound of air outlet can be effectively reduced.

In the utility model, the exhaust gas to be treated enters the muffler through the air inlet, then sequentially enters the first expansion cavity 2, the second expansion cavity 4, the first resonant cavity 5, the second resonant cavity 7, the third resonant cavity 9 and the cooling cavity 10, and the exhaust gas after being subjected to noise elimination of the resonant cavities enters the cooling cavity 10 through the air vent, so that the required noise elimination purpose is finally achieved, and the noise is low.

The silencer provided by the utility model is suitable for being arranged on a general gasoline generator to play a silencing function. The noise reduction effect on noise is realized under the combined action of the plurality of noise reduction layers and the noise reduction cavity, and compared with other similar noise reducers, the noise reduction effect is more obvious.

The present utility model is not limited to the above-mentioned embodiments, but is intended to be limited to the following embodiments, and any modifications, equivalents and modifications can be made to the above-mentioned embodiments without departing from the scope of the utility model.

Claims

1. A multi-cavity muffler for a gasoline engine is characterized in that: the device comprises a shell, wherein a plurality of partition boards are arranged in the shell, the interior of the shell is divided into a plurality of cavities by the partition boards, and the cavities are communicated with one another;

the novel air conditioner is characterized in that an air inlet (1) is formed in one side of the shell, the air inlet (1) is communicated with a first expansion cavity (2) in the shell, the first expansion cavity (2) is communicated with a second expansion cavity (4), the second expansion cavity (4) is communicated with a first resonant cavity (5), the first resonant cavity (5) is communicated with a second resonant cavity (7), the second resonant cavity (7) is communicated with a third resonant cavity (9), the third resonant cavity (9) is communicated with a cooling cavity (10), and the cooling cavity (10) is connected with an air outlet (11).

2. A multi-chamber muffler for a gasoline engine as defined in claim 1, wherein: the first expansion cavity (2) is communicated with the second expansion cavity (4) through the first section of air duct (3).

3. A multi-chamber muffler for a gasoline engine as defined in claim 1, wherein: the second expansion cavity (4) is communicated with the first resonance cavity (5) through a vent hole.

4. A multi-chamber muffler for a gasoline engine as defined in claim 1, wherein: the first resonant cavity (5) is communicated with the second resonant cavity (7) through a second air duct (6).

5. A multi-chamber muffler for a gasoline engine as defined in claim 1, wherein: the second resonant cavity (7) is communicated with the third resonant cavity (9) through a third air duct (8).

6. A multi-chamber muffler for a gasoline engine as defined in claim 1, wherein: the third resonant cavity (9) is communicated with the cooling cavity (10) through a second ventilation hole.

7. A multi-chamber muffler for a gasoline engine as defined in claim 1, wherein: the inner walls of the first expansion cavity (2), the second expansion cavity (4) and the first resonance cavity (5) are coated with a silencing layer.

8. A multi-chamber muffler for a gasoline engine as defined in claim 1, wherein: the inner wall of the shell is coated with a silencing layer.