CN102996203B - Engine silencer - Google Patents
Engine silencer Download PDFInfo
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- CN102996203B CN102996203B CN201210498023.0A CN201210498023A CN102996203B CN 102996203 B CN102996203 B CN 102996203B CN 201210498023 A CN201210498023 A CN 201210498023A CN 102996203 B CN102996203 B CN 102996203B
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- cavity
- housing
- outlet pipe
- air
- suction tude
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Abstract
The invention discloses an engine silencer relating to the technical field of machining. The engine silencer comprises a shell communicated with an air feeding pipe and an air exhausting pipe; an inner cavity of the shell is divided into an air feeding cavity, an air exhausting cavity and a resonant cavity by a movable separation plate and a fixed separation plate. The movable separation plate is in threaded connection with the shell; one side of the movable separation plate is connected with an adjusting rod stretching out of the shell; and a resonant neck pipe is further connected with one side of the adjusting rod, which is connected with the movable separation plate. The inner wall of the resonant cavity is embedded with a guide ring with a thread; and the movable separation plate can move on the guide ring under the effect of the adjusting rod so as to realize the dynamic adjustment of the volume of the resonant cavity. The engine silencer disclosed by the invention can solve the problem that the silencing effect of the existing engine silencer on low-frequency noises with variable frequency is not good.
Description
Technical field
The present invention relates to machinery manufacturing technology field, especially a kind of silencing apparatus on engineering machinery engine.
Background technique
In recent years, be configured in the motor particularly diesel engine in engineering machinery, in order to reduce the radiated noise of diesel-engine body itself, construction machinery product applies the lower diesel engine of rotating speed mostly, along with the continuous decline of its rotating speed, the low frequency characteristic of exhaust noise is more and more outstanding, and the suction tude usually adopted, outlet pipe is arranged perforated microstructure and the method increasing glass silk flosssilk wadding, can obviously weaken medium-high frequency noise, but to the low frequency noise poor effect of diesel engine, low frequency sound deadening capacity is generally within 10dB, resonance principle can carry out resonant silencing to the exhaust noise of lower frequency, but under different operating mode, diesel engine speed is not identical, then the fundamental frequency of exhaust noise is also just different, and the resonant frequency of resonant cavity and its volume are inversely proportional to, and resonance bands is narrow, so that diesel engine speed changes, low-frequency resonance soundproof effect disappears, be difficult to meet the soundproof effect to the low frequency noise of changeable frequency.Moreover complicated internal structure can cause that the pressure loss becomes large, processing cost uprises.
Summary of the invention
A kind of muffler for motor that problem to be solved by this invention is to provide, it can solve the existing silencing apparatus problem not good to the low frequency noise soundproof effect of changeable frequency.
In order to solve the problem, the technical solution adopted in the present invention is: this muffler for motor comprises the housing being communicated with suction tude and outlet pipe, and described housing cavity is divided into air-inlet cavity by active clapboard and stationary barrier, exhaust cavity and resonant cavity.
In technique scheme, more specifically scheme can also be: described active clapboard is threaded with described housing; Described active clapboard side is connected with the adjustable lever stretched out outside described housing, is also connected with resonance neck tube in the described active clapboard side be connected with described adjustable lever.
Further: described suction tude is connected with described air-inlet cavity, described outlet pipe is connected with described exhaust cavity; Described air-inlet cavity is communicated with by intervalve with described exhaust cavity, and described resonant cavity is connected by described resonance neck tube with described exhaust cavity.
Further: described suction tude is connected with described air-inlet cavity, described outlet pipe is connected with described exhaust cavity; Described air-inlet cavity is communicated with by intervalve with described exhaust cavity, and described resonant cavity is connected by described resonance neck tube with described air-inlet cavity.
Further: in the described resonant cavity chamber wall section of described housing cavity, be fixedly installed threaded duct ring, described duct ring is provided with boss near described exhaust cavity one end, and described active clapboard is threaded with the described duct ring be fixedly connected with on the housing; Described air-inlet cavity chamber wall is equipped with glass yarn cotton, and the net hoop being distributed with small perforation is pressed on described glass silk flosssilk wadding; Described suction tude and described outlet pipe the preceding paragraph are distributed with small perforation, and the end of described suction tude and described outlet pipe is all closed.
Further: the caliber of described resonance neck tube be about described housing outer diameter 1/8 ~ 1/10 between, length is 50 millimeters ~ 100 millimeters, and the end of resonance neck tube is with wearing microwell plate block, and punching rate is 0.1 ~ 0.5.
Owing to adopting technique scheme, the beneficial effect that compared with the prior art the present invention has is:
1, the present invention is at silencing apparatus indoor design driving mechanism, realizes the dynamic adjustments of resonant cavity volume, to change the resonant frequency of resonant cavity, meets the low frequency noise elimination requirement under motor different rotating speeds;
2, the present invention adopts the method for suction tude, outlet pipe arranging perforated microstructure and increasing glass silk flosssilk wadding, weakens medium-high frequency noise preferably, takes into account the high frequency acoustic attenuation performance of silencing apparatus;
3, the present invention is in conjunction with the good advantage of the intermediate frequency soundproof effect of binodal silencing apparatus, resonant cavity is integrated in silencing apparatus inside, have structure simple, be easy to manufacture, the advantage such as sound deadening capacity is large, anechoic frequency bandwidth.
Accompanying drawing explanation
Fig. 1 is that the master of the embodiment of the present invention 1 looks cross-sectional view.
Fig. 2 is that the master of the embodiment of the present invention 2 looks cross-sectional view.
Embodiment
Below in conjunction with attached Example, structure of the present invention is described in further detail:
Embodiment 1:
Muffler for motor shown in Fig. 1, comprises the housing 1 being communicated with suction tude 10 and outlet pipe 8; Housing 1 inner chamber is divided into air-inlet cavity by active clapboard 7 and stationary barrier 9, exhaust cavity and resonant cavity.
Active clapboard 7 side is connected with the adjustable lever 6 stretched out outside housing 1, is welded with in active clapboard 7 side be connected with adjustable lever 6 neck tube 5 that resonates, and resonance neck tube 5 caliber is 1/9 of housing 1, and length is 80 millimeters, and end is with wearing microwell plate block, and punching rate is 0.1.
Suction tude 10 is connected with described air-inlet cavity, and outlet pipe 8 is connected with described exhaust cavity; Described air-inlet cavity is communicated with by intervalve 3 with described exhaust cavity, and described resonant cavity is connected by described resonance neck tube 5 with described exhaust cavity;
The described resonant cavity chamber wall section of housing 1 inner chamber is fixedly installed threaded duct ring 4, duct ring 4 is provided with boss near described exhaust cavity one end, this boss is to active clapboard 7 position-limiting actions, and active clapboard 7 is threaded with the duct ring 4 be fixedly connected on housing 1; Active clapboard 7 moves under the effect of adjustable lever 6 on duct ring 4, thus realize the change of described exhaust cavity and described resonant cavity volume, realize the dynamic adjustments of resonant cavity volume, to change the resonant frequency of resonant cavity, meet the low frequency noise elimination requirement under motor different rotating speeds;
Suction tude 10 and outlet pipe 8 along silencing apparatus radially across frame 1, both calibers are equal, end is all closed, and intercross arrangement in 90 °, and self-styled closed end is arranged to inlet end or exhaust end and arranged micropunch more, and punching rate is 0.15, and hole pitch is all 10 millimeters; Described air-inlet cavity and described exhaust cavity are divided into isometric(al) cavity by dividing plate 9, and intervalve 3 is coaxial with housing 1, the caliber of intervalve 3 than suction tude 10 and outlet pipe 8 slightly large; Described air-inlet cavity inwall lays large density glass silk flosssilk wadding 11, its acoustic absorptivity more than 0.5, thickness 30 millimeters, and glass silk flosssilk wadding 11 net hoop 2 is pressed on the inwall of housing 1, and the punching rate of net hoop 2 is 0.3, and hole pitch is 10 millimeters; These structures weaken medium-high frequency noise preferably, take into account the high frequency acoustic attenuation performance of muffler for motor.
Embodiment 2:
Muffler for motor as shown in Figure 2, described resonant cavity is arranged in the left side of described air-inlet cavity as different from Example 1, described resonant cavity is connected by the neck tube 5 that resonates with described air-inlet cavity, and in described resonant cavity, duct ring 4 boss is arranged near described air-inlet cavity one end; Active clapboard 7 moves under the effect of adjustable lever 6 on duct ring 4, what change is the volume of described air-inlet cavity and described resonant cavity, realize the dynamic adjustments of resonant cavity volume equally, thus change the resonant frequency of resonant cavity, meet the low frequency noise elimination requirement under motor different rotating speeds equally; Other structure is identical with embodiment 1 with principle.
Claims (6)
1. a muffler for motor, comprises the housing (1) being communicated with suction tude (10) and outlet pipe (8), it is characterized in that: described housing (1) inner chamber is divided into air-inlet cavity, exhaust cavity and resonant cavity by active clapboard (7) and stationary barrier (9); Described active clapboard (7) is threaded with described housing (1); Described active clapboard (7) side is connected with stretches out described housing (1) adjustable lever outward (6), is also connected with in described active clapboard (7) side be connected with described adjustable lever (6) neck tube (5) that resonates; Described suction tude (10) is connected with described air-inlet cavity, and described outlet pipe (8) is connected with described exhaust cavity; Described air-inlet cavity is communicated with by intervalve (3) with described exhaust cavity, and described resonant cavity is connected by described resonance neck tube (5) with described exhaust cavity; The described resonant cavity chamber wall section of described housing (1) inner chamber is fixedly installed threaded duct ring (4), described duct ring (4) is provided with boss near described exhaust cavity one end, and described active clapboard (7) is threaded with the described duct ring (4) be fixedly connected on described housing (1); Described air-inlet cavity chamber wall is equipped with glass yarn cotton (11), and the net hoop (2) being distributed with small perforation is pressed on described glass silk flosssilk wadding (11); Described suction tude (10) and described outlet pipe (8) the preceding paragraph are distributed with small perforation, and the end of described suction tude (10) and described outlet pipe (8) is all closed; The end of described resonance neck tube (5) is with wearing microwell plate block, and punching rate is 0.1 ~ 0.5.
2. muffler for motor according to claim 1, is characterized in that: the caliber of described resonance neck tube (5) be described housing (1) external diameter 1/8 ~ 1/10 between, length is 50 millimeters ~ 100 millimeters.
3. a muffler for motor, comprises the housing (1) being communicated with suction tude (10) and outlet pipe (8), it is characterized in that: described housing (1) inner chamber is divided into air-inlet cavity, exhaust cavity and resonant cavity by active clapboard (7) and stationary barrier (9); Described active clapboard (7) is threaded with described housing (1); Described active clapboard (7) side is connected with stretches out described housing (1) adjustable lever outward (6), is also connected with in described active clapboard (7) side be connected with described adjustable lever (6) neck tube (5) that resonates; Described suction tude (10) is connected with described air-inlet cavity, and described outlet pipe (8) is connected with described exhaust cavity; Described air-inlet cavity is communicated with by intervalve (3) with described exhaust cavity, and described resonant cavity is connected by the neck tube that resonates (5) with described air-inlet cavity; The described resonant cavity chamber wall section of described housing (1) inner chamber is fixedly installed threaded duct ring (4), described duct ring (4) is provided with boss near described air-inlet cavity one end, and described active clapboard (7) is threaded with the described duct ring (4) be fixedly connected on described housing (1); Described air-inlet cavity chamber wall is equipped with glass yarn cotton (11), and the net hoop (2) being distributed with small perforation is pressed on described glass silk flosssilk wadding (11); Described suction tude (10) and described outlet pipe (8) the preceding paragraph are distributed with small perforation, and the end of described suction tude (10) and described outlet pipe (8) is all closed; The end of described resonance neck tube (5) is with wearing microwell plate block, and punching rate is 0.1 ~ 0.5.
4. muffler for motor according to claim 3, is characterized in that: the caliber of described resonance neck tube (5) be described housing (1) external diameter 1/8 ~ 1/10 between, length is 50 millimeters ~ 100 millimeters.
5. a muffler for motor, comprises the housing (1) being communicated with suction tude (10) and outlet pipe (8), it is characterized in that: the air-inlet cavity that described housing (1) inner chamber is divided into by active clapboard (7) and stationary barrier (9), exhaust cavity and resonant cavity; Described suction tude (10) is connected with described air-inlet cavity, and described outlet pipe (8) is connected with described exhaust cavity; Described air-inlet cavity is communicated with by intervalve (3) with described exhaust cavity, and described resonant cavity is connected by the neck tube that resonates (5) with described exhaust cavity; The described resonant cavity chamber wall section of described housing (1) inner chamber is fixedly installed threaded duct ring (4), described duct ring (4) is provided with boss near described exhaust cavity one end, and described active clapboard (7) is threaded with the described duct ring (4) be fixedly connected on described housing (1); Described air-inlet cavity chamber wall is equipped with glass yarn cotton (11), and the net hoop (2) being distributed with small perforation is pressed on described glass silk flosssilk wadding (11); Described suction tude (10) and described outlet pipe (8) the preceding paragraph are distributed with small perforation, and the end of described suction tude (10) and described outlet pipe (8) is all closed; The end of described resonance neck tube (5) is with wearing microwell plate block, and punching rate is 0.1 ~ 0.5.
6. muffler for motor according to claim 5, is characterized in that: the caliber of described resonance neck tube (5) be described housing (1) external diameter 1/8 ~ 1/10 between, length is 50 millimeters ~ 100 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210498023.0A CN102996203B (en) | 2012-11-29 | 2012-11-29 | Engine silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210498023.0A CN102996203B (en) | 2012-11-29 | 2012-11-29 | Engine silencer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102996203A CN102996203A (en) | 2013-03-27 |
| CN102996203B true CN102996203B (en) | 2014-12-24 |
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ID=47925240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210498023.0A Active CN102996203B (en) | 2012-11-29 | 2012-11-29 | Engine silencer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102996203B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016123139A1 (en) | 2016-11-30 | 2018-05-30 | Eberspächer Exhaust Technology GmbH & Co. KG | Exhaust silencer and method for its production |
| CN113357714A (en) * | 2021-07-12 | 2021-09-07 | 珠海格力电器股份有限公司 | Resonance type muffler and air conditioner |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201202513Y (en) * | 2008-06-05 | 2009-03-04 | 重庆大学 | Exhausting silencer with variable volume |
| CN201738988U (en) * | 2010-06-09 | 2011-02-09 | 上海天纳克排气系统有限公司 | Helmholtz resonator with variable tuning pipe |
| CN102536386A (en) * | 2011-12-29 | 2012-07-04 | 湛江市华夏消声器有限公司 | Structurally modified automobile exhaust muffler assembly |
| CN102733891A (en) * | 2011-04-11 | 2012-10-17 | 天津市七星精密机械有限公司 | Exhaust silencer of damping type engine |
-
2012
- 2012-11-29 CN CN201210498023.0A patent/CN102996203B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201202513Y (en) * | 2008-06-05 | 2009-03-04 | 重庆大学 | Exhausting silencer with variable volume |
| CN201738988U (en) * | 2010-06-09 | 2011-02-09 | 上海天纳克排气系统有限公司 | Helmholtz resonator with variable tuning pipe |
| CN102733891A (en) * | 2011-04-11 | 2012-10-17 | 天津市七星精密机械有限公司 | Exhaust silencer of damping type engine |
| CN102536386A (en) * | 2011-12-29 | 2012-07-04 | 湛江市华夏消声器有限公司 | Structurally modified automobile exhaust muffler assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102996203A (en) | 2013-03-27 |
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Address after: Pull the the Liujiang River city Liuzhou County town Shuangyong road 545100 the Guangxi Zhuang Autonomous Region Patentee after: Liugong Machinery Co., Ltd. Patentee after: LIUGONG CHANGZHOU MACHINERY CO., LTD. Patentee after: Guangxi Liugong Machinery Co., Ltd. Address before: Pull the the Liujiang River city Liuzhou County town Shuangyong road 545100 the Guangxi Zhuang Autonomous Region Patentee before: Liugong Machinery Co., Ltd. Patentee before: Liugong Changzhou Excvavtor Co., Ltd. Patentee before: Guangxi Liugong Machinery Co., Ltd. |