CN211525037U - Air inlet noise silencer of single-cylinder air compressor of diesel engine - Google Patents
Air inlet noise silencer of single-cylinder air compressor of diesel engine Download PDFInfo
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- CN211525037U CN211525037U CN202020017408.0U CN202020017408U CN211525037U CN 211525037 U CN211525037 U CN 211525037U CN 202020017408 U CN202020017408 U CN 202020017408U CN 211525037 U CN211525037 U CN 211525037U
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Abstract
The utility model provides a diesel engine single cylinder air compressor machine noise silencer that admits air can effectively reduce diesel engine air intake system noise. The gas inlet pipe is mainly composed of a gas inlet pipe and a resonance pipe, wherein one end of the resonance pipe is communicated with the gas inlet pipe, and the other end of the resonance pipe is plugged.
Description
Technical Field
The utility model belongs to the technical field of the equipment of making an uproar falls in the diesel engine air compressor machine admits air, concretely relates to diesel engine single cylinder air compressor machine noise silencer that admits air.
Background
The noise of the air intake system is one of the main noise sources of the diesel engine, and when the engine is in a low idle speed, the air intake noise of the air compressor becomes the main component of the noise of the diesel engine, so that the subjective experience of a driver is greatly influenced, and meanwhile, the noise also causes great trouble to personnel outside the automobile. At present, the problem of air intake noise reduction of the domestic diesel engine air compressor is not effectively solved.
SUMMERY OF THE UTILITY MODEL
Problem to prior art existence, the utility model provides a diesel engine single cylinder air compressor machine noise silencer that admits air can effectively reduce diesel engine air intake system noise.
The utility model discloses a realize through following technical scheme:
the utility model provides a diesel engine single cylinder air compressor machine noise muffler that admits air, is including intake pipe and resonance tube, the one end intercommunication of resonance tube is in on the intake pipe, the other end shutoff of resonance tube.
Further, the other end of the resonance tube is blocked by a blocking cover; the resonance pipe and the air inlet pipe are the same in diameter and pipe wall thickness.
Furthermore, the air inlet pipe is of a U-shaped structure, and the connecting end of the resonance pipe is located at the center of the right section of the air inlet pipe.
Furthermore, the interlude of intake pipe is equipped with two fixed pipe clamps.
Furthermore, the resonance tube is made of metal.
Compared with the prior art, the utility model the beneficial effect who gains as follows:
1. the incident sound wave and the reflected sound wave generate related interference through the resonance tube to achieve the aim of silencing, so that the noise reduction effect is obvious, and the target single-frequency noise is reduced by more than 20dB (A);
2. the inner diameter and the wall thickness of the resonance pipe and the air inlet pipe are consistent, and the noise elimination structure is simple and easy to produce and process;
3. the pipeline trend has no strict requirement, the diesel engine is easy to arrange, and the method is suitable for different types of diesel engines;
4. the metal material has firm structure and good reliability and is suitable for long-term use;
5. the air intake resistance is small, and the normal use of the engine is not influenced;
6. the length of the resonance tube is changed, so that the noise reduction device can be suitable for noise reduction of different diesel engine air compressor air inlet systems.
Drawings
FIG. 1 is a schematic view of the three-dimensional structure of the intake noise silencer of the single cylinder air compressor of the diesel engine of the present invention;
FIG. 2 is a schematic diagram of the internal structure of the resonance tube according to the present invention;
in the figure: 1. air inlet pipe, 2, resonance pipe, 3, blanking cover, 4, fixed pipe clamp.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the embodiments described herein are merely for the purpose of illustrating the invention and for the purpose of promoting a better understanding of the invention, and the accompanying drawings and examples are included to provide a further understanding of the invention.
As shown in figures 1 and 2, the utility model provides a noise silencer admits air of single cylinder air compressor of diesel engine. The device comprises an air inlet pipe 1, a resonance pipe 2, a blocking cover 3 and two fixed pipe clamps 4. The air inlet pipe 1 and the resonance pipe 2 are straight-through pipes, and the air inlet pipe 1 and the resonance pipe 2 are made of metal materials and have the same inner diameter and wall thickness. The air inlet pipe 1 is of a U-shaped structure and comprises a left section, a middle section and a right section, and the left end of the air inlet pipe 1 is an air inlet and the right end of the air inlet pipe is an air outlet. One end of the resonance tube 2 is communicated with the middle position of the right section of the air inlet tube 1 in a welding mode, and the general plug cover 3 at the other end of the resonance tube 2 is plugged in an interference fit mode. Two fixed butler 4 are installed to the interlude of intake pipe, can fix the intake pipe on the diesel engine shell. The length of the resonance tube 2 is 1/4 wavelengths of the noise reduction target single frequency noise. In this embodiment, it should be noted that the length of the resonance tube can be adjusted according to the noise reduction frequency. The principle is that when sound waves are transmitted in a pipeline and are reflected when meeting a boundary, the silencer of the side branch utilizes the mutual interference between the reflected sound waves and incident sound waves, and therefore the purpose of silencing is achieved. And the maximum amount of sound deadening is expressed as
Wherein TL is the transmission loss of the muffler, i.e., the muffling volume;
l is the length of the resonance tube 2;
m is an expansion ratio which is the ratio of the inner diameter sectional area of the resonance pipe 2 to the inner diameter sectional area of the air inlet pipe 1;
lambda is the single frequency acoustic wave wavelength;
for a single frequency acoustic wave the wavelength formula is
Where c is the speed of sound and f is the target frequency of sound attenuation.
By the derivation of the theoretical formula, when L is 1/4 λ, the maximum value is obtained, that is, when the length of the resonance tube 2 is 1/4 wavelengths of the noise reduction single frequency, the optimal noise reduction effect is achieved.
When the device is used, the air inlet end of the air inlet pipe 1 is connected with the air compressor, and the other end of the air inlet pipe is connected with the air inlet of the diesel engine. The device achieves the aim of silencing by enabling incident sound waves and reflected sound waves to generate related interference through the resonance tube 2.
The device is provided with two fixed pipe clamps simultaneously, so that the shaking condition of the device on a diesel engine is reduced, the reliability of the device is improved, and the service life of the device is prolonged.
Claims (5)
1. The utility model provides a diesel engine single cylinder air compressor machine noise muffler that admits air which characterized in that, including intake pipe and resonance tube, the one end intercommunication of resonance tube is in on the intake pipe, the other end shutoff of resonance tube.
2. The air inlet noise silencer of the single cylinder air compressor of the diesel engine as claimed in claim 1, wherein the other end of the resonance pipe is blocked by a blocking cover; the resonance pipe and the air inlet pipe are the same in diameter and pipe wall thickness.
3. The air intake noise silencer of the single cylinder air compressor of the diesel engine as set forth in claim 1, wherein the air intake pipe is of a U-shaped structure, and the connecting end of the resonance pipe is located at the center of the right section of the air intake pipe.
4. The air intake noise silencer for the single cylinder air compressor of the diesel engine as claimed in claim 3, wherein two fixed pipe clamps are provided at the middle section of the air intake pipe.
5. The air intake noise silencer for the single cylinder air compressor of the diesel engine as claimed in any one of claims 1 to 4, wherein the resonance pipe is made of metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020017408.0U CN211525037U (en) | 2020-01-06 | 2020-01-06 | Air inlet noise silencer of single-cylinder air compressor of diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020017408.0U CN211525037U (en) | 2020-01-06 | 2020-01-06 | Air inlet noise silencer of single-cylinder air compressor of diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211525037U true CN211525037U (en) | 2020-09-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020017408.0U Active CN211525037U (en) | 2020-01-06 | 2020-01-06 | Air inlet noise silencer of single-cylinder air compressor of diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211525037U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112746879A (en) * | 2021-01-04 | 2021-05-04 | 东风汽车股份有限公司 | Tubular silencer for automobile |
-
2020
- 2020-01-06 CN CN202020017408.0U patent/CN211525037U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112746879A (en) * | 2021-01-04 | 2021-05-04 | 东风汽车股份有限公司 | Tubular silencer for automobile |
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