CN202900389U - Reactive muffler structure used for engineering machinery - Google Patents
Reactive muffler structure used for engineering machinery Download PDFInfo
- Publication number
- CN202900389U CN202900389U CN 201220633237 CN201220633237U CN202900389U CN 202900389 U CN202900389 U CN 202900389U CN 201220633237 CN201220633237 CN 201220633237 CN 201220633237 U CN201220633237 U CN 201220633237U CN 202900389 U CN202900389 U CN 202900389U
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- Prior art keywords
- curved section
- chamber
- cavity
- pipe
- hush pipe
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Abstract
The utility model discloses a reactive muffler structure used for engineering machinery. A front separation plate and a rear separation plate which are longitudinally arranged sequentially divide the inside of a barrel body into a cavity I, a cavity II and a cavity III which are mutually independent from front to back, an air inlet pipe, an air outlet pipe and a muffling barrel are arranged along the axial direction of the barrel body, the air inlet pipe is communicated with the cavity I, the air outlet pipe is communicated with the cavity III, a main body of the muffling barrel is located in the cavity II, the front end port and the rear end port of the muffling barrel enable the cavity I and the cavity III to be communicated, the muffling barrel is a straight streamline hole-penetrating pipe which is transversely zygomorphic along the transverse central line, the section, located in the cavity I, of the muffling barrel part comprises a transversely zygomorphic first curved section along the central line, the section, located in the cavity II, of the muffling barrel part comprises a second curved section and a third curved section which are transversely zygomorphic and mutually connected along the central line, the first curved section is connected with the second curved section through a linear section, and the tail end of the third curved section extends to the cavity III through a linear section. The reactive muffler structure used for the engineering machinery is simple in structure and is small in regenerated noise of airflow.
Description
Technical field
The utility model relates to a kind of model muffler structure, especially a kind of reactive muffler structure for engineering machinery.
Background technique
Reactive muffler is one of main path of existing Control Engineering mechanical noise, the raising of muffler desing level has important meaning for promoting China's overall engineering machine quality, and insertion loss and the pressure loss are to estimate two very important evaluation indexes of Sound Elimination Performance of Mufflers and aerodynamic quality.Design studies improves silencing apparatus, makes it when increasing transmission loss, guarantee the pressure loss in the scope of motor requirement with the interior important means that becomes noise reduction.
Automotive engineering (the 30th volume) the 3rd phase in 2008 " automotive muffler optimal design and comprehensive evaluation index " was simply described a kind of optimization of silencing apparatus internal structure, had used a kind of straight cervical vertebra pipe silencer element.Straight cervical vertebra pipe is comprised of billiard table shape contraction section, straight neck tube and conic diffuse.After using Taper Pipe silencer element optimization acoustic wave filter structure, in the situation that the space, chassis allows to have increased volume and the quality of silencing apparatus, the soundproof effect of silencing apparatus significantly improves.But this structure is not obvious for the soundproof effect of medium-high frequency, and does not effectively control exhaust back pressure.
Summary of the invention
The purpose of this utility model is for overcoming above-mentioned the deficiencies in the prior art, provide a kind of rational in infrastructure, acoustical behavior is good, long service life, reproduced air-flow noise is little, the soundproof effect of the basic, normal, high audio-frequency noise of engine exhaust significantly is used for the reactive muffler structure of engineering machinery.
For achieving the above object, the utility model adopts following technical proposals:
A kind of reactive muffler structure for engineering machinery, comprise cylindrical shell, suction tude, steam outlet pipe and hush pipe, front dividing plate and rear bulkhead by vertical setting in the described cylindrical shell are divided into separate chamber I, chamber II, chamber III from front to back successively with cylindrical shell; Described suction tude, steam outlet pipe and hush pipe are axial arranged along cylindrical shell, and suction tude is communicated with the chamber I, and steam outlet pipe is communicated with the chamber III; The main body of described hush pipe is positioned at the chamber II, and the front and back end ports of this hush pipe is connected chamber I and chamber III respectively; Described hush pipe is along the streamlined perforated pipe of the laterally zygomorphic direct current of cross central line, the hush pipe that is arranged in the chamber I partly comprises laterally zygomorphic the first curved section along the cross section of center line, the hush pipe main body that is arranged in the chamber II comprises laterally zygomorphic interconnective the second curved section and the 3rd curved section along the cross section of center line, the first curved section links to each other by straightway with the second curved section, and the end of the 3rd curved section also extends in the chamber III by straightway.
The coordinate representation of described the first curved section is
y＝-x
2/9 (1)
In the formula: x is characterized as 0≤x≤15, and unit is mm.
The coordinate representation of described the second curved section is
x＝y
2/10 (2)
In the formula: y is characterized as 0≤y≤30, and unit is mm.
Described the 3rd curved section coordinate representation is
y＝-x
2/25 (3)
In the formula: x is characterized as 0≤x≤25, and unit is mm.
The punching rate of described hush pipe is controlled to be 16.5% ± 2%, and hush pipe is provided with the aperture that some diameters are 5mm.
The beneficial effects of the utility model are that (1) noise reduction cylindrical shell is taked sweep outline, therefore has preferably aerodynamic performance, has reduced the flow resistance of structure generation, reduces simultaneously reproduced air-flow noise; (2) selection of punching rate in conjunction with the investigation index of flow dynamics and acoustic attenuation performance, obtains comparatively reasonably scope through too much taking turns test simulation.When producing lower exhaust back pressure, greatly improved the full frequency band sound deadening capacity, obtained good soundproof effect.
Description of drawings
Fig. 1 is the utility model plan view;
Fig. 2 be among Fig. 1 A-A to cross-sectional view;
Fig. 3 be among Fig. 1 B-B to cross-sectional view;
1 suction tude wherein, 2 chamber I, 3 front dividing plates, 4 chamber II, 5 hush pipes, 6 rear bulkheads, 7 chamber III, 8 steam outlet pipes, 9 cylindrical shells, 10. the first curved section, 11. second curved sections, 12. the 3rd curved sections.
Embodiment
Below in conjunction with drawings and Examples the utility model is further specified.
As shown in Figure 1 and Figure 2, be used for the novel reactive muffler structure of engineering machinery, comprise cylindrical shell 9, suction tude 1, steam outlet pipe 8 is divided into chamber I 2, chamber II 4, chamber III 7 according to inferior from front to back with cylindrical shell by front dividing plate 3 and rear bulkhead 6 in the described cylindrical shell 9; The main body of hush pipe 5 is arranged in the chamber II 4, and the front and back end ports of this hush pipe 5 is connected chamber I 2 and chamber III 7 respectively; Described hush pipe 5 is along the streamlined perforated pipe of the laterally zygomorphic direct current of cross central line, the hush pipe that is arranged in chamber I 2 partly comprises laterally zygomorphic the first curved section 10 along the cross section of center line, the hush pipe main body that is arranged in chamber II 4 comprises laterally zygomorphic interconnective the second curved section 11 and the 3rd curved section 12 along the cross section of center line, the first curved section 10 links to each other by straightway with the second curved section 11, and the end of the 3rd curved section 12 also extends in the chamber III 7 by straightway.
Suction tude 1, steam outlet pipe 8 and hush pipe 5 are axial arranged along cylindrical shell 9, and suction tude 1 is communicated with chamber I 2, and steam outlet pipe 8 is communicated with chamber III 7.
Hush pipe 5 is the direct current perforated pipe, is controlled to be y=-x at chamber I 2 middle section boundary curves
2/ 9, in the formula: x is characterized as 0≤x≤15, and unit is mm, is x=y in chamber II 4 middle front part cross sectional boundary curve controlled
2/ 10, in the formula: y is characterized as 0≤y≤30, and unit is mm, is y=-x in chamber II 4 mid-rear portion cross sectional boundary curve controlled
2/ 25, in the formula: x is characterized as 0≤x≤25, and unit is mm.
The punching rate of hush pipe 5 is 16.5% ± 2%, and the hole diameter on the hush pipe 5 is 5mm.
During use, the gas that suction tude 1 is discharged enters chamber I 2, and gas enters chamber II 4 by hush pipe 5, enters chamber III 7 after expanding in chamber II 4, and last air-flow is discharged by steam outlet pipe 8.
Although above-mentionedly by reference to the accompanying drawings embodiment of the present utility model is described; but be not the restriction to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in protection domain of the present utility model.
Claims (5)
1. reactive muffler structure that is used for engineering machinery, comprise cylindrical shell, suction tude, steam outlet pipe and hush pipe, front dividing plate and rear bulkhead by vertical setting in the described cylindrical shell are divided into separate chamber I, chamber II, chamber III from front to back successively with cylindrical shell; Described suction tude, steam outlet pipe and hush pipe are axial arranged along cylindrical shell, and suction tude is communicated with the chamber I, and steam outlet pipe is communicated with the chamber III; The main body of described hush pipe is positioned at the chamber II, and the front and back end ports of this hush pipe is connected chamber I and chamber III respectively; It is characterized in that, described hush pipe is along the streamlined perforated pipe of the laterally zygomorphic direct current of cross central line, the hush pipe that is arranged in the chamber I partly comprises laterally zygomorphic the first curved section along the cross section of center line, the hush pipe main body that is arranged in the chamber II comprises laterally zygomorphic interconnective the second curved section and the 3rd curved section along the cross section of center line, the first curved section links to each other by straightway with the second curved section, and the end of the 3rd curved section also extends in the chamber III by straightway.
2. acoustic wave filter structure as claimed in claim 1 is characterized in that, the coordinate representation of described the first curved section is
y＝-x
2/9
In the formula: x is characterized as 0≤x≤15, and unit is mm.
3. acoustic wave filter structure as claimed in claim 1 is characterized in that, the coordinate representation of described the second curved section is
x＝y
2/10
In the formula: y is characterized as 0≤y≤30, and unit is mm.
4. acoustic wave filter structure as claimed in claim 1 is characterized in that, the coordinate representation of described the 3rd curved section is
y＝-x
2/25
In the formula: x is characterized as 0≤x≤25, and unit is mm.
5. acoustic wave filter structure as claimed in claim 1 is characterized in that, the punching rate of described hush pipe is 16.5% ± 2%, the aperture that it is 5mm that hush pipe is provided with some diameters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220633237 CN202900389U (en) | 2012-11-26 | 2012-11-26 | Reactive muffler structure used for engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220633237 CN202900389U (en) | 2012-11-26 | 2012-11-26 | Reactive muffler structure used for engineering machinery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202900389U true CN202900389U (en) | 2013-04-24 |
Family
ID=48121069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220633237 Expired - Fee Related CN202900389U (en) | 2012-11-26 | 2012-11-26 | Reactive muffler structure used for engineering machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202900389U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102926851A (en) * | 2012-11-26 | 2013-02-13 | 山东大学 | Reactive muffler structure used for construction machinery |
-
2012
- 2012-11-26 CN CN 201220633237 patent/CN202900389U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102926851A (en) * | 2012-11-26 | 2013-02-13 | 山东大学 | Reactive muffler structure used for construction machinery |
| CN102926851B (en) * | 2012-11-26 | 2015-02-11 | 山东大学 | Reactive muffler structure used for construction machinery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130424 Termination date: 20151126 |