CN2531110Y - Impedance composite exhaust silencer for engine - Google Patents
Impedance composite exhaust silencer for engine Download PDFInfo
- Publication number
- CN2531110Y CN2531110Y CN 02228203 CN02228203U CN2531110Y CN 2531110 Y CN2531110 Y CN 2531110Y CN 02228203 CN02228203 CN 02228203 CN 02228203 U CN02228203 U CN 02228203U CN 2531110 Y CN2531110 Y CN 2531110Y
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- Prior art keywords
- pipe
- chamber
- perforated
- noise
- perforation
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Abstract
The utility model discloses an engine resistance compound type exhaust muffler comprises a small through-hole pipe, a left large through-hole pipe, a right large through-hole pipe, and a through-hole board fixedly arranged inside the outer shell. The through-hole board separates the muffler into two cavities of a first cavity and a second cavity. The left large through-hole pipe and a separation board divide the first cavity into an inner and an outer two cavities. The right through-hole pipe and the separation board divide the second cavity into an inner and an outer two cavities. The utility model maintains the advantage of resistant exhaust muffler, the number of the through-hole pipe segment and the through-hole board is as big as five, and the inner layout of the muffler is provided with resistant sound absorption material with good sound absorption effect to high frequency noise. So the utility model has very good sound eliminating effect in all frequency area.
Description
(1) technical field
The utility model belongs to muffler for motor, particularly relates to a kind of motor impedance composite exhaust silencer that perforated pipe, perforated plate and sound-absorbing material are arranged.
(2) background technique
At present, existing engine exhaust muffler mainly adopts the resistance exhaust silencer structure of pipeline section expansion and cross-sectional constriction, utilize sound wave in the variation of abrupt change of cross-section place owing to acoustic reactance, some sound wave reflects back to sound source, and the not outlet by silencing apparatus, thereby reach the purpose of noise elimination.This resistance exhaust silencer centering, low-frequency noise noise elimination effect are better.And for high frequency noise, since adopt to high frequency noise the eliminate the noise effective perforation pipeline section and the negligible amounts of perforated plate, and the inner not layout resistive sound-absorbing material good to the high frequency noise acoustically effective, it is undesirable to the noise elimination effect of high frequency noise.
(3) summary of the invention
The purpose of this utility model is to provide a kind of effective motor impedance composite exhaust silencer of eliminating the noise in whole frequency range.
The technical solution of the utility model is: it comprises a little perforated pipe that is fixed in the frame, two large perforation pipes and a perforated plate, and little perforated pipe penetrates from left end cap, passes perforated plate and passes from right end cap.Perforated plate is divided into two chambeies with silencing apparatus.Two large perforation pipes are fixed on the little perforated pipe by dividing plate.Left side large perforation pipe and dividing plate are divided into inside and outside two chambeies with first chamber; Right large perforation pipe and dividing plate are divided into inside and outside two chambeies with second chamber.The rarest closure plate is divided into a cross-sectional expansion perforation pipeline section and a cross-sectional constriction perforation pipeline section with perforated pipe in little perforated pipe.Frame internal face in first chamber is furnished with the resistive sound-absorbing material good to the high frequency noise acoustically effective, and sound-absorbing material is fixed by the wire netting cylinder.The utility model has kept resistance exhaust silencer centering, the effective advantage of low frequency noise noise elimination.The utility model has four perforation pipeline sections and a perforated plate, to eliminate the noise nearly five of the quantity of effective perforation pipeline section and perforated plate of high frequency noise, and the silencing apparatus internal placement has the good resistive sound-absorbing material of pair high frequency noise acoustically effective, and silencing apparatus might as well to the noise elimination effect of high frequency noise.Therefore, the utility model all has good noise elimination effect in whole frequency range.
(4) description of drawings
Fig. 1 is a structural representation of the present utility model, and Fig. 2 is a M-M sectional view of the present utility model.
(5) embodiment
In silencing apparatus shown in Figure 1, it is made up of end cap 1, sound-absorbing material 2, wire netting cylinder 3, left large perforation pipe 4, dividing plate 5, little perforated pipe 6, perforated plate 7, closure plate 8, right large perforation pipe 9, frame 10.Little perforated pipe 6 penetrates from left end cap, passes perforated plate 7 and passes from right end cap.Perforated plate 7 is divided into the first chamber E and the second chamber F with silencing apparatus.Have at least a closure plate to be divided into cross-sectional expansion perforation pipeline section A and cross-sectional constriction perforation pipeline section B in the little perforated pipe 6.Left side large perforation pipe 4, right large perforation pipe 9 are fixed on the little perforated pipe 6 by dividing plate.Left side large perforation pipe 4 and dividing plate are divided into inside and outside two chambeies with the first chamber E; Right large perforation pipe 9 and dividing plate are divided into inside and outside two chambeies with the second chamber F.Cross-sectional expansion perforation pipeline section C is on left large perforation pipe 4, and cross-sectional constriction perforation pipeline section D is on right large perforation pipe 9.Therefore, total A, B of the utility model, C, D four perforation pipeline section and a perforated plate 6.Be furnished with resistive sound-absorbing material in the silencing apparatus first chamber E, resistive sound-absorbing material is fixed on the frame internal face by wire netting cylinder 3.The utility model can reach good effect by following process.
(1) imports the noise of muffler inlet into from waste pipe, because the obstruct of closure plate 8, after eliminating the noise through cross-sectional expansion perforation pipeline section A, import the first chamber inner chamber into.
(2) import the first chamber exocoel into after this part noise that imports the first chamber inner chamber into is eliminated the noise through cross-sectional expansion perforation pipeline section C.
(3) this part noise that imports the first chamber exocoel into imports the second chamber exocoel into after eliminating the noise through resistive sound-absorbing material 3 and perforated plate 7.
(4) import the second chamber inner chamber into after this part noise that imports the second chamber exocoel into is eliminated the noise through cross-sectional constriction perforation pipeline section D.
(5) reach the silencing apparatus outlet after this part noise that imports the second chamber inner chamber into is eliminated the noise through cross-sectional constriction perforation pipeline section B.
Import the noise elimination of the noise of muffler inlet through above-mentioned five noise elimination processes into from waste pipe, the noise that reaches the silencing apparatus outlet port will be reduced significantly.Know that from Fig. 1 the utility model has resistance exhaust silencer centering, the effective advantage of low frequency noise noise elimination concurrently; Adopt simultaneously to eliminate the noise nearly five of the quantity of effective perforation pipeline section and perforated plate of high frequency noise, and the good resistive sound-absorbing material of pair high frequency noise acoustically effective is arranged in the silencing apparatus internal placement.Therefore, the utility model all has good noise elimination effect in whole frequency range.
Claims (4)
1. motor impedance composite exhaust silencer, it comprises a little perforated pipe that is fixed in the frame, left large perforation pipe, right large perforation pipe and a perforated plate, it is characterized in that: little perforated pipe penetrates from left end cap, passing perforated plate passes from right end cap, perforated plate is divided into first chamber and second chamber with silencing apparatus, and left and right two large perforation pipes are fixed on the little perforated pipe by dividing plate.
2. silencing apparatus according to claim 1 is characterized in that: left large perforation pipe and dividing plate are divided into inside and outside two chambeies with first chamber, and right large perforation pipe and dividing plate are divided into inside and outside two chambeies with second chamber.
3. silencing apparatus according to claim 1 is characterized in that: the rarest closure plate is divided into two perforation pipeline sections with perforated pipe in little perforated pipe.
4. silencing apparatus according to claim 1 is characterized in that: the frame internal face in first chamber is furnished with the resistive sound-absorbing material good to the high frequency noise acoustically effective, and sound-absorbing material is fixed by the wire netting cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02228203 CN2531110Y (en) | 2002-01-19 | 2002-01-19 | Impedance composite exhaust silencer for engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02228203 CN2531110Y (en) | 2002-01-19 | 2002-01-19 | Impedance composite exhaust silencer for engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2531110Y true CN2531110Y (en) | 2003-01-15 |
Family
ID=33704824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02228203 Expired - Fee Related CN2531110Y (en) | 2002-01-19 | 2002-01-19 | Impedance composite exhaust silencer for engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2531110Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422218A (en) * | 2015-12-18 | 2016-03-23 | 华南理工大学 | Efficient and environment-friendly automobile muffler and sound elimination method thereof |
| CN106837625A (en) * | 2017-01-09 | 2017-06-13 | 同济大学 | A kind of straight-through double-deck perforation silencer of multi-cavity for eliminating broadband noise |
| CN106894924A (en) * | 2017-01-09 | 2017-06-27 | 同济大学 | A kind of double-deck perforation silencer of the multi-cavity bayonet tube type for eliminating compressed air induction system broadband noise |
| CN108386253A (en) * | 2018-03-28 | 2018-08-10 | 广东知识城运营服务有限公司 | A kind of loading machine silencer mechanism |
-
2002
- 2002-01-19 CN CN 02228203 patent/CN2531110Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422218A (en) * | 2015-12-18 | 2016-03-23 | 华南理工大学 | Efficient and environment-friendly automobile muffler and sound elimination method thereof |
| CN105422218B (en) * | 2015-12-18 | 2018-02-27 | 华南理工大学 | A kind of high-efficiency environment friendly automotive muffler and its sound reduction method |
| CN106837625A (en) * | 2017-01-09 | 2017-06-13 | 同济大学 | A kind of straight-through double-deck perforation silencer of multi-cavity for eliminating broadband noise |
| CN106894924A (en) * | 2017-01-09 | 2017-06-27 | 同济大学 | A kind of double-deck perforation silencer of the multi-cavity bayonet tube type for eliminating compressed air induction system broadband noise |
| CN108386253A (en) * | 2018-03-28 | 2018-08-10 | 广东知识城运营服务有限公司 | A kind of loading machine silencer mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |