CN213144686U - Noise reduction device of air compressor for vehicle - Google Patents

Abstract

The utility model discloses a device of making an uproar falls in automobile-used air compressor belongs to mechanical technical field, and the series connection is installed between air cleaner's the clean end of admitting air and air compressor machine, including the cavity body, the one end of cavity body is provided with the import pipe, and the other end is provided with the outlet pipe, the utility model discloses a device of making an uproar falls in automobile-used air compressor has and admits air smoothly, and is small, simple to operate, reliable accuracy, characteristics such as safe in utilization are fit for improving noise frequency range 24-77Hz air compressor machine noise, have been covered all medium-sized and heavy cargo carrying, tractor.

Description

Noise reduction device of air compressor for vehicle

Technical Field

The utility model belongs to the technical field of machinery, concretely relates to automobile-used air compressor falls device of making an uproar.

Background

With low noise engine control, air compressor noise, one of the main accessories of the engine, is more and more prominent due to the masking effect of car noise. Becoming the primary sound source in the cab of an automobile. At present, in the field of automobile NVH performance control, the technical problem that an air compressor is difficult to solve is that the noise is large. The pumping noise of the air compressor is transmitted into the cab through sound-sound, directly influences the noise in the cab, and is particularly obvious in idling. The riding comfort of the automobile and the subjective perception of the user are influenced. Through a large amount of technical accumulation, the silencer is arranged at the air inlet section of the air compressor to solve the problem.

The air compressor is connected with the crankshaft of the engine, and air cylinders of the air compressor regularly pump air according to a certain frequency along with the rotation of the engine. Clean air is continuously fed into the air storage barrel. The brake is used for service braking and parking braking of large-scale cargo and tractors. Because the pumping frequency is fixed, the pumping noise frequency can be calculated.

The pump noise of the air compressor is transmitted into a cab through sound-sound, the noise in the cab is directly influenced, the identification technology is difficult, a large amount of technology accumulation verifies that the noise of the air compressor has the influence of nearly 2dB on the noise in the vehicle, the working principle of the air compressor is clear, the pump frequency is constant, and the pump noise frequency can be calculated. Therefore, the muffler device of the air compressor is produced. The prior silencing device of the air compressor is an effective means for solving the problem. At present, almost no silencing device is used for air compressors on large-scale cargo carrying and towing vehicles in China. Foreign air compressors are used for reducing noise and reducing noise.

Muffling devices are widely used in automotive engine exhaust where resistance and resistance are mixed to design the muffler. Is broadband. The air compressor is connected with the crankshaft of the engine, and air cylinders of the air compressor regularly pump air according to a certain frequency along with the rotation of the engine. The idling-rated speed of the large-scale cargo-carrying tractor is usually about 600-1900 rpm. Thus, the air compressor muffler assembly design muffling frequency is narrow band. It is reasonable to use a reactive muffler of a certain volume.

At present, all cargo carrying and towing vehicles are forward-turning type cabs, and the existing silencer is large in size, difficult to install, complex in structure and high in cost and is not suitable for silencing by an air compressor. And thus cannot be extended.

The reactive muffler is a muffler which is produced by changing impedance in the sound transmission process through abrupt change positions of the section of a pipeline or a bypass resonant cavity and the like to generate reflection and interference of sound energy, so that the sound energy radiated outwards by the muffler is reduced, and the purpose of sound elimination is achieved. A muffler reflects sound waves back to a sound source. In which structures such as expansion and resonators are used to mismatch impedance to reflect sound waves. It is especially suitable for the air inlet and exhaust ports of air compressor, automobile engine and other piston engine.

The utility model has the following contents:

in order to overcome the above-mentioned defect that exists among the prior art, the utility model provides a device of making an uproar falls in automotive air compressor for general frequency range falls and makes an uproar at each motorcycle type air compressor between 24-77Hz, the utility model discloses utilize the sudden expansion of pipeline cross-section to make the interior acoustic impedance sudden change of passageway to the sound source is reflected back through not being unable the silencer to the sound wave that makes certain frequency of following the pipeline propagation, and the sound wave just can not pass out through the silencer yet, thereby reaches air compressor's noise elimination purpose. The utility model discloses an air compressor falls device of making an uproar has simple structure, simple to operate, characteristics such as low cost.

The utility model discloses a following technical scheme realizes:

the utility model provides a device of making an uproar falls in automobile-used air compressor, establishes ties and installs between air cleaner's the clean end of admitting air and air compressor machine, includes the cavity body, the one end of cavity body is provided with the import pipe, and the other end is provided with the outlet pipe.

Preferably, the chamber body is cylindrical with a diameter of 90 mm.

Preferably, the inlet tube has a diameter of 20mm and the outlet tube has a diameter of 20 mm.

Preferably, the total length of the noise reduction device is 180mm, and the noise reduction device is suitable for improving the noise of the air compressor in the frequency range of 24-77 Hz. All medium and heavy duty cargo, tractors are covered.

Compared with the prior art, the utility model has the advantages as follows:

the utility model discloses a device of making an uproar falls in automobile-used air compressor has and admits air smoothly, and is small, and simple to operate, precision are reliable, characteristics such as safe in utilization are fit for improving the air compressor machine noise of 24-77Hz of noise frequency range, have covered all medium-sized and heavy cargo carrying, tractor.

Drawings

Fig. 1 is a schematic structural view of a noise reduction device of an air compressor for a vehicle according to the present invention;

in the figure: a chamber body 1, an inlet pipe 2, an outlet pipe 3.

Detailed Description

For clear and complete description of the technical solution and the specific working process of the present invention, the following embodiments are provided in conjunction with the accompanying drawings of the specification:

in the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Example 1

As shown in figure 1, the noise reduction device for the air compressor for the vehicle is installed between an air inlet cleaning end of an air filter and the air compressor in series and comprises a cavity body, wherein an inlet pipe is arranged at one end of the cavity body, and an outlet pipe is arranged at the other end of the cavity body.

The chamber body is cylindrical, and the diameter is 90 mm.

The diameter of the inlet pipe is 20mm, and the diameter of the outlet pipe is 20 mm.

The total length of the noise reduction device is 180mm, and the noise reduction device is suitable for improving the noise of the 24-77Hz air compressor in the frequency range. All medium and heavy duty cargo, tractors are covered.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the details of the above embodiments, and the technical concept of the present invention can be within the scope of the present invention to perform various simple modifications to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and in order to avoid unnecessary repetition, the present invention does not need to describe any combination of the features.

In addition, various embodiments of the present invention can be combined arbitrarily, and the disclosed content should be regarded as the present invention as long as it does not violate the idea of the present invention.

Claims (4)

1. The utility model provides a device of making an uproar falls in automobile-used air compressor which characterized in that, the series connection is installed between the clean end of admitting air and the air compressor machine of air cleaner, includes the cavity body, the one end of cavity body is provided with the import pipe, and the other end is provided with the outlet pipe.

2. The noise reducer of claim 1, wherein the chamber body is cylindrical and has a diameter of 90 mm.

3. The noise reducer of claim 1, wherein the inlet tube has a diameter of 20mm and the outlet tube has a diameter of 20 mm.

4. The noise reducer of claim 1, wherein the noise reducer has an overall length of 180 mm.

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