CN213392583U - Adjustable noise reduction wavelength tube of whole vehicle air compressor air inlet pipeline - Google Patents
Adjustable noise reduction wavelength tube of whole vehicle air compressor air inlet pipeline Download PDFInfo
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- CN213392583U CN213392583U CN202022454504.4U CN202022454504U CN213392583U CN 213392583 U CN213392583 U CN 213392583U CN 202022454504 U CN202022454504 U CN 202022454504U CN 213392583 U CN213392583 U CN 213392583U
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Abstract
The utility model discloses a whole car air compressor machine air inlet pipeline adjustable noise reduction wave long tube, including the air inlet pipeline, be equipped with the closed reflecting tube on the air inlet pipeline perpendicularly, the adjustable length of closed reflecting tube, the tip of closed reflecting tube is equipped with block structure. The utility model discloses an adjustable noise wave long pipe that falls of whole car air compressor machine air inlet pipeline belongs to engine technical field, has set up the closed reflecting tube on the air inlet pipeline, utilizes the principle that sine wave and the cosine wave of reflection can offset each other, makes the noise sound wave weakened greatly to reduce the air compressor machine and inflate the noise, the structure is simpler, and the cost is cheaper, accepts for the customer more easily.
Description
Technical Field
The utility model relates to an engine technology, more specifically say, it relates to an adjustable noise reduction wave length pipe of whole car air compressor machine air inlet pipeline.
Background
At present, fuel oil and gas commercial automobiles at home and abroad are generally provided with an air compressor to provide compressed air for auxiliary braking. The air inlet of the air compressor is guided by an air inlet pipeline behind an air filter of the engine and in front of a supercharger air compressor, and due to structural arrangement reasons, when most vehicles work at the air compressor, air shunting of the air compressor can cause abnormal noise of the air inlet pipeline of the engine, which is commonly called inflating noise.
Some passenger cars, high-end passenger cars and trucks may design a dedicated helmholtz noise-damping cavity with reference to an exhaust muffler, but the structure is expensive and general vehicles are not equipped with the helmholtz noise-damping cavity.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to prior art some not enough of the aforesaid, the utility model aims at providing a noise reduction wave long tube is transferred to whole car air compressor machine air inlet pipeline that noise reduction effect is good.
In order to achieve the above object, the utility model provides an adjustable noise wave reducing pipe of whole car air compressor machine air inlet pipeline, including the air inlet pipeline, be equipped with the closed reflecting tube on the air inlet pipeline perpendicularly, the length of closed reflecting tube is adjustable, the tip of closed reflecting tube is equipped with block structure.
Furthermore, the length L of the closed reflection pipe is one fifth to one third of the maximum wavelength lambda of the noise sound wave, the closed reflection pipe comprises a fixed pipe section fixedly connected with the air inlet pipeline and a movable pipe section sleeved at the lower end of the fixed pipe section in a position-adjustable manner, and a blocking structure is arranged at the bottom end of the movable pipe section.
Furthermore, the air inlet pipeline comprises an air compressor opening connecting section, an engine air inlet pipeline opening connecting section and a straight pipe section, the air compressor opening connecting section and the engine air inlet pipeline opening connecting section are arranged at two ends of the air inlet pipeline, the straight pipe section is arranged in the middle of the air inlet pipeline, and the closed reflection pipe is perpendicular to the straight pipe section.
Furthermore, the straight pipe section is of a hard pipe structure, and the opening connecting section of the air compressor and the opening connecting section of the engine air inlet pipeline are of flexible pipe structures capable of being bent.
Furthermore, the closed reflection pipe is arranged at one end, close to the opening connecting section of the engine air inlet pipeline, of the straight pipe section.
Advantageous effects
Compared with the prior art, the utility model discloses a whole car air compressor machine air inlet pipeline is adjustable to be fallen noise wave long pipe's beneficial effect as follows:
(1) the utility model discloses an adjustable noise reduction wave pipe of whole car air compressor machine air inlet pipeline, the air inlet pipeline has set up the closed reflection tube, utilizes the principle that sine wave and reflected cosine wave can offset each other, makes the noise sound wave weakened greatly to reduce the air compressor machine noise of inflating, the structure is simpler, and the cost is cheaper, more easily accepts for the customer;
(2) the utility model discloses an adjustable noise reduction wave long tube of whole car air compressor machine air inlet pipeline, the length of the closed reflecting tube is adjustable to can reach the purpose of absorbing more noises through the length of adjustment closed reflecting tube, adaptability is good, and the adjustment is convenient.
Drawings
Fig. 1 is a schematic structural view of the adjustable noise reduction wave pipe of the air inlet pipeline of the air compressor of the whole vehicle of the present invention;
fig. 2 is the utility model discloses an enlarged schematic diagram of the structure of adjustable noise reduction wave length pipe of whole car air compressor machine air inlet pipeline.
In the figure: 1. an air intake line; 11. an air compressor opening connecting section; 12. a straight pipe section; 13. an engine air inlet pipeline opening connecting section; 2. a closed reflection tube; 21. fixing the pipe section; 22. a movable pipe section; 3. and (4) a plugging structure.
Detailed Description
The present invention will be further described with reference to the following examples, which are not intended to limit the scope of the present invention, but are intended to be covered by the appended claims in any way.
The specific embodiment of the present invention is such: referring to fig. 1-2, a noise reduction method for an air inlet pipeline of an air compressor of a whole vehicle comprises the following steps: firstly, testing the air inlet noise spectrum of the whole vehicle, and identifying the wavelength lambda of the sound wave with the maximum noise; then, a closed reflection pipe 2 with a length L of 1/5 lambda to 1/3 lambda is vertically arranged on the air inlet pipeline 1 to absorb noise sound waves, the length of the closed reflection pipe 2 is adjustable, then the noise decibel detected at the air outlet end of the air inlet pipeline 1 is detected while the length of the closed reflection pipe 2 is finely adjusted, and when the detected noise decibel is minimum, the adjustment of the length of the closed reflection pipe 2 is stopped.
The utility model discloses an among the whole car air compressor machine air inlet pipeline noise reduction method, air inlet pipeline 1 is last to have set up closed reflecting tube 2, because the noise sound wave is the sine wave, the sound wave reaches the tip in 1/5 lambda to 1/3 lambda length L's closed reflecting tube 2 and then reflects the back wave that returns and be the cosine wave, sine wave and cosine wave can offset each other, consequently can noise absorption through closed reflecting tube 2, the noise sound wave has been weakened greatly, thereby it inflates the noise to reduce the air compressor machine, the structure is simpler, the cost is cheaper, accept for the customer more easily.
In the noise reduction method for the air inlet pipeline of the whole vehicle air compressor, the length of the closed reflection pipe 2 is adjustable, so that the purpose of absorbing more noise can be achieved by adjusting the length of the closed reflection pipe 2, the adaptability is good, and the adjustment is convenient; the application range of the noise frequency is more flexible and wider.
In this embodiment, the closed reflection pipe 2 includes a fixed pipe section 21 fixedly connected to the air intake pipeline 1 and an adjustable movable pipe section 22 sleeved at the lower end of the fixed pipe section 21, and the bottom end of the movable pipe section 22 is provided with a blocking structure 3 capable of offsetting or absorbing most of sound waves of the maximum noise and absorbing some of the noise of other frequencies.
In this embodiment, the air intake pipeline 1 includes an air compressor opening connecting section 11, an engine air intake pipeline opening connecting section 13 and a straight pipe section 12, the air compressor opening connecting section 11 and the engine air intake pipeline opening connecting section are arranged at two ends of the air intake pipeline, the straight pipe section 12 is arranged in the middle of the air intake pipeline, the closed reflection pipe 2 is perpendicular to the straight pipe section 12, and the closed reflection pipe 2 is communicated with the straight pipe section 12.
In the present embodiment, the straight pipe section 12 is a hard pipe structure, so that sound waves can be propagated straight along the axial direction of the pipe section, so that the vertically arranged closed reflection pipe 2 can attenuate the sound waves of noise; the air compressor opening connecting section 11 and the engine air inlet pipeline opening connecting section 13 are flexible hose structures which can be bent, are convenient to connect and are suitable for structural arrangement in an engine cabin.
The utility model provides an adjustable noise wave long tube that falls of whole car air compressor machine air inlet pipeline, includes air inlet pipeline 1, is equipped with closed reflecting tube 2 perpendicularly on the air inlet pipeline 1, and the length of closed reflecting tube 2 is adjustable, and the tip of closed reflecting tube 2 is equipped with block structure 3. This adjustable noise wave long pipe that falls of whole car air compressor machine air inlet pipeline, air inlet pipeline 1 is last to have set up closed reflecting tube 2, because the noise sound wave is the sine wave, the sound wave reaches the tip in 1/5 lambda to 1/3 lambda length L's closed reflecting tube 2 and then the back wave of reflection back is the cosine wave, sine wave and cosine wave can offset each other, consequently, can the noise absorption through closed reflecting tube 2, the noise sound wave has been weakened greatly, thereby reduce the air compressor machine noise of inflating, the structure is simpler, the cost is cheaper, accept for the customer more easily.
In the adjustable noise reduction wave long pipe of the air inlet pipeline of the whole vehicle air compressor, the length of the closed reflection pipe 2 is adjustable, so that the aim of absorbing more noise can be fulfilled by adjusting the length of the closed reflection pipe 2, and the air compressor air inlet pipeline has good adaptability and is convenient to adjust; the application range of the noise frequency is more flexible and wider.
The length L of the closed reflection pipe 2 is one fifth to one third of the maximum wavelength lambda of the noise sound wave, the closed reflection pipe 2 comprises a fixed pipe section 21 fixedly connected with the air inlet pipeline 1 and a movable pipe section 22 which can be positioned and sleeved at the lower end of the fixed pipe section 21, and the bottom end of the movable pipe section 22 is provided with a plugging structure 3.
The movable pipe section 22 can be connected with the fixed pipe section 21 in a sealing mode through a threaded structure, a sealing ring and the like, and the position adjustment is convenient and quick.
The movable pipe section 22 may be a rubber pipe, and the fixed pipe section 21 and the blocking structure 23 are connected by a pipe clamp.
The movable pipe section 22 may also be a hard pipe made of cast steel, cast aluminum, engineering plastics, etc., and the fixed pipe section 21 and the blocking structure 23 are connected by a sealing ring, a flange gasket, etc.
The blocking structure 23 is integrated on the movable pipe section 22, that is, the movable pipe section 22 is a cylinder structure with closed ends and is integrally formed, so that the blocking structure 23 is eliminated, and the use of parts is reduced.
The movable pipe section 22 may be a multi-section structure of hose and rigid pipe.
In this embodiment, the air intake pipeline 1 includes an air compressor opening connecting section 11, an engine air intake pipeline opening connecting section 13 and a straight pipe section 12, the air compressor opening connecting section 11, the engine air intake pipeline opening connecting section 13 and the straight pipe section 12 are arranged in the middle, the closed reflection pipe 2 is perpendicular to the straight pipe section 12, and the length of the straight pipe section 12 is at least 4L, so that noise can be sinusoidally transmitted in the straight pipe section 12 along the axial direction of the pipe section.
In this embodiment, the straight pipe section 12 is of a rigid pipe structure, and the air compressor opening connection section 11 and the engine intake pipe opening connection section 13 are of a bendable hose structure.
In the present embodiment, the closed reflection pipe 2 is arranged at one end of the straight pipe section 12 close to the engine inlet pipe opening connecting section 13, namely close to the air outlet, so that more noise generated by the flow of air can be weakened.
The above is only a preferred embodiment of the present invention, and it should be noted that for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which will not affect the utility of the invention and the utility of the patent.
Claims (5)
1. The utility model provides an adjustable noise reduction wave long tube of whole car air compressor machine air inlet pipeline which characterized in that, includes air inlet pipeline (1), be equipped with on air inlet pipeline (1) perpendicularly and close a mouth speculum (2), the length of closing a mouth speculum (2) is adjustable, the tip of closing a mouth speculum (2) is equipped with block structure (3).
2. The adjustable noise reduction wave tube for the air inlet pipeline of the whole vehicle air compressor as claimed in claim 1, wherein the length L of the closed reflection tube (2) is one fifth to one third of the maximum wavelength λ of noise waves, the closed reflection tube (2) comprises a fixed tube section (21) fixedly connected with the air inlet pipeline (1) and an adjustable movable tube section (22) sleeved at the lower end of the fixed tube section (21), and a blocking structure (3) is arranged at the bottom end of the movable tube section (22).
3. The adjustable noise reduction wave tube for the air inlet pipeline of the whole vehicle air compressor as claimed in claim 1 or 2, wherein the air inlet pipeline (1) comprises an air compressor opening connecting section (11) arranged at two ends, an engine air inlet pipeline opening connecting section (13) and a straight tube section (12) arranged in the middle, and the closed reflecting tube (2) is arranged perpendicular to the straight tube section (12).
4. The adjustable noise reduction wave tube for the air inlet pipeline of the whole vehicle air compressor as claimed in claim 3, wherein the straight tube section (12) is of a hard tube structure, and the air compressor opening connecting section (11) and the engine air inlet pipeline opening connecting section (13) are of flexible tube structures.
5. The adjustable noise reduction wave tube for the air inlet pipeline of the whole vehicle air compressor as claimed in claim 4, wherein the closed reflection tube (2) is arranged at one end of the straight tube section (12) close to the opening connecting section (13) of the air inlet pipeline of the engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022454504.4U CN213392583U (en) | 2020-10-30 | 2020-10-30 | Adjustable noise reduction wavelength tube of whole vehicle air compressor air inlet pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022454504.4U CN213392583U (en) | 2020-10-30 | 2020-10-30 | Adjustable noise reduction wavelength tube of whole vehicle air compressor air inlet pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213392583U true CN213392583U (en) | 2021-06-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022454504.4U Active CN213392583U (en) | 2020-10-30 | 2020-10-30 | Adjustable noise reduction wavelength tube of whole vehicle air compressor air inlet pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213392583U (en) |
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2020
- 2020-10-30 CN CN202022454504.4U patent/CN213392583U/en active Active
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