CN205225522U - Engine and noise eliminator - Google Patents
Engine and noise eliminator Download PDFInfo
- Publication number
- CN205225522U CN205225522U CN201520830136.5U CN201520830136U CN205225522U CN 205225522 U CN205225522 U CN 205225522U CN 201520830136 U CN201520830136 U CN 201520830136U CN 205225522 U CN205225522 U CN 205225522U
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- CN
- China
- Prior art keywords
- airtight cavity
- silencer
- motor
- cavity
- air column
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- Expired - Fee Related
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Abstract
The utility model discloses a noise eliminator, including airtight cavity and the breather pipe of setting on airtight cavity, the breather pipe passes through air vent and airtight cavity intercommunication. Device that this scheme provided has adopted cavity resonance sound absorbing structure, and when vibrating when the effect of air column at external sound wave of air vent under, because the rubbing action of air column and pore wall, the conversion of energy that moves of air column falls for the heat energy loss, promptly the air column because of friction loss acoustic energy, the frequency of shoc of vibration frequency and the pore wall department of air vent of air column equals when incident acoustic wave frequency f in the external world equals with the natural frequency f0 of system, and air column in the aperture can be because resonance and producing be acutely vibrated, and the acoustic energy of consumption is the maxmizing also to the biggest sound absorption effect has been reached. This scheme is utilized cavity resonance sound absorbing structure and is set up cavity resonance sound absorbing structure in the intake pipe position of engine, has effectively realized reaching the purpose that reduces the engine noise from the angle of engine induction noise.
Description
Technical field
The utility model relates to technical field of engines, particularly a kind of motor and silencer.
Background technique
Along with the development of national economy, the application of fork truck is more and more extensive, and user is to the requirement of fork truck also corresponding raising.There is the large problem of noise in fork truck of the prior art, the main cause that noise produces is noise and the engine noise of car body component vibration generation, based on engine noise.
The method that tradition reduces engine noise reduces each movement parts of motor and exhaust sound, little concern engine charge noise, but, along with progress and the maturation of technology, due to motor itself and exhaust sound more and more less, make to adopt traditional approach to reduce the effect of generator noise more and more weak.
Therefore, how to reach from the angle of engine charge noise the object reducing engine noise, become the technical problem that those skilled in the art are urgently to be resolved hurrily.
Model utility content
In view of this, the utility model provides a kind of silencer, to realize reaching from the angle of engine charge noise the object reducing engine noise.The utility model additionally provides a kind of motor.
For achieving the above object, the utility model provides following technological scheme:
A kind of silencer, comprising:
Airtight cavity, described airtight cavity is provided with mounting hole positioned opposite, and described mounting hole site is in the lower end of described airtight cavity;
Through described airtight cavity and be arranged on the breathing pipe be tightly connected with described mounting hole in described mounting hole, described breathing pipe is communicated with the suction tude of motor, and the sidewall that described breathing pipe is positioned at the part of described airtight cavity offers the vent be communicated with described airtight cavity.
Preferably, in above-mentioned silencer, described airtight cavity comprises:
Cover plate parallel and positioned opposite, described cover plate is provided with described mounting hole;
With the chamber wall of the edge mate of described cover plate, described chamber wall is connected with described cover plate for sealing.
Preferably, in above-mentioned silencer, described cover plate and described chamber wall are welded to connect.
Preferably, in above-mentioned silencer, described airtight cavity is L-type airtight cavity.
Preferably, in above-mentioned silencer, described airtight cavity is rectangular tight cavity.
Preferably, in above-mentioned silencer, described airtight cavity is provided with the first mounting plate for being connected with motor on the described cover plate of described motor side, the described cover plate of described airtight cavity away from described motor side is provided with the second mounting plate for being connected with motor, described first mounting plate and the bolt hole described second mounting plate is provided with for being connected with described motor.
Preferably, in above-mentioned silencer, described first mounting plate and described second mounting plate are all welded to connect with described airtight cavity, or described first mounting plate and described second mounting plate are all bolted with described airtight cavity.
Preferably, in above-mentioned silencer, described breathing pipe and described airtight cavity are welded to connect.
Preferably, in above-mentioned silencer, described breathing pipe is provided with air filter near the side of described motor.
A kind of motor, it is characterized in that, comprise silencer, described silencer is the silencer described in above-mentioned any one, and described silencer is arranged in the suction tude of described motor.
As can be seen from technique scheme, the silencer that the utility model provides is arranged in the suction tude of motor, and comprise airtight cavity and be arranged on the breathing pipe on airtight cavity, breathing pipe is communicated with airtight cavity by vent.The device that this programme provides have employed cavity resonance sound absorption structure, suppose that the degree of depth of vent is t, the diameter of vent is d, when t and d less than wave length of sound a lot of time, the resiliently deformable of the air column in vent aperture is very little, now air column can process as mass block, the volume V of airtight cavity is more much larger than aperture d, the effect of pneumatic spring can be played, when the air column of vent vibrates under the effect of external sound wave, due to the rubbing action of air column and hole wall, the Conversion of Energy of moving of air column is that heat energy loss falls, namely air column is because frictional loss acoustic energy, as extraneous incident acoustic wave frequency f and system frequency f
0time equal and the vibration frequency of air column equal with the vibration frequency at the hole wall place of vent, the air column in aperture can produce high vibration due to resonance, and the acoustic energy of consumption also reaches maximum, thus reaches maximum acoustically effective.This programme utilizes cavity resonance sound absorption structure and cavity resonance sound absorption structure is arranged on the suction tude position of motor, effectively achieves and reaches from the angle of engine charge noise the object reducing engine noise.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of the silencer that Fig. 1 provides for the utility model embodiment;
The cut-away view of the silencer that Fig. 2 provides for the utility model embodiment.
1, airtight cavity, 11, cover plate, 12, chamber wall, 2, breathing pipe, 21, vent, the 3, first mounting plate, the 4, second mounting plate.
Embodiment
The utility model discloses a kind of silencer, to realize reaching from the angle of engine charge noise the object reducing engine noise.The invention also discloses a kind of motor.
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technological scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1 and Fig. 2, the structural representation of the silencer that Fig. 1 provides for the utility model embodiment; The cut-away view of the silencer that Fig. 2 provides for the utility model embodiment.
The utility model discloses a kind of silencer, comprising: airtight cavity 1 and breathing pipe 2, breathing pipe 2 is communicated with airtight cavity 1 by vent 21.
The structure of airtight cavity 1: airtight cavity 1 is provided with mounting hole positioned opposite, mounting hole site is in the lower end of airtight cavity 1.
The structure of breathing pipe: breathing pipe 2 can through airtight cavity and be arranged in mounting hole, breathing pipe 2 and mounting hole are tightly connected, breathing pipe 1 is communicated with the suction tude of motor, and the sidewall that breathing pipe 2 is positioned at the part of airtight cavity 1 offers the vent 21 be communicated with airtight cavity 1.
The silencer that this programme provides make use of cavity resonance sound absorption structure, and airtight cavity 1 is as the closed cavity of cavity resonance sound absorption structure, and vent 21 is as the opening be communicated with closed cavity, and vent 21 is also communicated with free surrounding space by breathing pipe 2.
Concrete noise-cancelling theory is as follows:
Suppose that the degree of depth of vent 21 is t, the diameter of vent 21 is d, when t and d less than wave length of sound a lot (this condition as well known to those skilled in the art is easy to meet), the resiliently deformable of the air column in aperture is very little, now air column can process as mass block, the volume V of airtight cavity is more much larger than aperture d, the effect of pneumatic spring can be played, when the air column of vent vibrates under the effect of external sound wave, due to the rubbing action of air column and hole wall, the moving energy and can be converted into heat energy loss and fall of air column, namely air column is because frictional loss acoustic energy, as extraneous incident acoustic wave frequency f and system frequency f
0time equal and the vibration frequency of air column equal with the vibration frequency at the hole wall place of vent, the air column in aperture can produce high vibration due to resonance, and the acoustic energy now consumed also reaches maximum, thus reaches maximum acoustically effective, in airtight cavity 1, the sudden change due to acoustic impedance is that reflection and interference phenomenon occur sound wave, makes acoustic energy decay further.
Along with progress and the maturation of technology, motor itself is more and more less with outlet pipe noise, the noise of suction tude eliminates the concern angle becoming those skilled in the art, silencer is arranged on engine air inlet tube by this programme, realize eliminating the noise of engine air inlet tube by cavity resonance sound absorption structure, thus reach the object reducing engine noise further.
The device that this programme provides is from a new angle and from engine charge tube angulation reduction engine noise, and relative to the mode reducing engine noise and exhaust sound simple in prior art, the effect reducing engine noise is more obvious.
The structure of the airtight cavity 1 that this programme provides comprises:
Cover plate 11 parallel and positioned opposite, cover plate 11 is provided with mounting hole;
With the chamber wall 12 of the edge mate of cover plate 11, chamber wall 12 and cover plate 11 are tightly connected.
Cover plate 11 coordinates with chamber wall 12 and forms airtight cavity 1, can reduce the difficulty of processing of airtight cavity 1 to a certain extent.
The mode of sound-absorbing material noise reduction is adopted in prior art, the complex structure of silencer, and windage is larger, expansion chamber silencing apparatus specific aim is not strong, although perforation silencing apparatus anechoic frequency bandwidth, but Design and manufacture is more loaded down with trivial details, and cost is higher, the silencer structure that this programme provides is simple, form cavity resonance sound absorption structure by airtight cavity 1 and breathing pipe 2, utilize physical arrangement to eliminate the noise, in the process of producing and manufacture, particular/special requirement be there is no to airtight cavity 1 and breathing pipe 2, Design and manufacture is simple, and cost is low.
In order to ensure the join strength of cover plate 11 and chamber wall 12, cover plate 11 and chamber wall 12 are welded to connect, and accordingly, cover plate 11 and chamber wall 12 are metallic material and make, and irony or steel material specifically can be adopted to make.Be welded to connect can ensure on the one hand cover plate 11 and chamber wall 12 combine after sealing, welding procedure is simply on the other hand, and cost is low, can ensure the manufacturing efficiency of airtight cavity 1.
The shape of airtight cavity 1 can have multiple, in the specific embodiment of model utility, airtight cavity 1 is L-type airtight cavity, airtight cavity 11 also can be rectangular tight cavity, or airtight cavity 1 is cylindrical enclosure chamber wall, as long as the volume V that can realize airtight cavity is more much larger than the aperture d of vent 21, airtight cavity is designed to said structure, can ensure that the inner space of airtight cavity 1 on the basis using equivalent material is larger, thus ensure the soundproof effect of silencer further.
In order to optimize technique scheme further, in a specific embodiment of the present utility model, airtight cavity 1 is provided with the first mounting plate 3 for being connected with motor on the cover plate 11 of motor side, airtight cavity 1 is away from the second mounting plate 4 cover plate 11 of motor side is provided with for being connected with motor, first mounting plate 3 and the bolt hole the second mounting plate 4 is provided with for being connected with motor, preferably, bolt hole on first mounting plate 3 is U-shaped hole, the adjustment of silencer position can be facilitated, bolt hole on second mounting plate 3 is circular bolt holes.Silencer and described motor also can by being welded to connect or riveting.
Accordingly, first mounting plate 3 and the second mounting plate 4 can adopt with the connection of airtight cavity 1 and be welded to connect, to ensure the installation strength of the first mounting plate 3 and the second mounting plate 4, the first mounting plate 3 and the second mounting plate 4 also can be bolted with the connection of airtight cavity 1 or the first mounting plate 3 and the second mounting plate 4 and airtight cavity 1 riveting.
Breathing pipe 2 can adopt with the connection of airtight cavity 1 and be welded to connect, and by breathing pipe 2 through the mounting hole on airtight cavity 1, then breathing pipe 2 and airtight cavity 1 are welded to connect, vent 21 is positioned at airtight cavity 1, and vent 2 should be avoided in the position of welding.
In order to ensure the degree of purity of the air entering motor, reduce the pollution to engine interior, breathing pipe 2 is provided with air filter near the side of motor, and the air entering motor, first by silencer, then enters engine interior by air filter.In addition, air filter serves as dissipative muffler in silencer, and the filter screen of air filter, as porous sound-absorbing material, is propagated in acoustic wave filter net, dissipates, reach the object of noise elimination further because acoustic energy is converted into heat energy in friction.Air filter and silencer are combined into resistive complex muffler, and soundproof effect is obvious.
The invention also discloses a kind of motor, comprise silencer, silencer is the silencer described in above-mentioned any one, silencer is arranged in the suction tude of motor, realize must processing engine air inlet tube place noise, thus realize the object reducing engine noise from engine charge tube angulation.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the utility model.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from spirit or scope of the present utility model, can realize in other embodiments.Therefore, the utility model can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a silencer, is characterized in that, comprising:
Airtight cavity (1), (1) is provided with mounting hole positioned opposite to described airtight cavity, and described mounting hole site is in the lower end of described airtight cavity (1);
Through described airtight cavity and be arranged on the breathing pipe (2) be tightly connected with described mounting hole in described mounting hole, described breathing pipe (2) is communicated with the suction tude of motor, and the sidewall that described breathing pipe (2) is positioned at the part of described airtight cavity (1) offers the vent (21) be communicated with described airtight cavity (1).
2. silencer according to claim 1, is characterized in that, described airtight cavity (1) comprising:
Cover plate (11) parallel and positioned opposite, (11) are provided with described mounting hole with described cover plate;
With the chamber wall (12) of the edge mate of described cover plate (11), described chamber wall (12) and described cover plate (11) are tightly connected.
3. silencer according to claim 2, is characterized in that, described cover plate (11) and described chamber wall (12) are welded to connect.
4. silencer according to claim 1, is characterized in that, described airtight cavity (1) is L-type airtight cavity.
5. silencer according to claim 1, is characterized in that, described airtight cavity (1) is rectangular tight cavity.
6. silencer according to claim 2, it is characterized in that, described airtight cavity (1) is provided with the first mounting plate (3) for being connected with motor on the described cover plate (11) of described motor side, described airtight cavity (1) away from the second mounting plate (4) the described cover plate (11) of described motor side is provided with for being connected with motor, described first mounting plate (3) and the bolt hole described second mounting plate (4) is provided with for being connected with described motor.
7. silencer according to claim 6, it is characterized in that, described first mounting plate (3) and described second mounting plate (4) are all welded to connect with described airtight cavity (1), or described first mounting plate (3) and described second mounting plate (4) are all bolted with described airtight cavity (1).
8. silencer according to claim 1, is characterized in that, described breathing pipe (2) and described airtight cavity (1) are welded to connect.
9. silencer according to claim 1, is characterized in that, described breathing pipe (2) is provided with air filter near the side of described motor.
10. a motor, is characterized in that, comprises silencer, and described silencer is arranged in the suction tude of described motor for the silencer in claim 1-9 described in any one, described silencer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520830136.5U CN205225522U (en) | 2015-10-23 | 2015-10-23 | Engine and noise eliminator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520830136.5U CN205225522U (en) | 2015-10-23 | 2015-10-23 | Engine and noise eliminator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205225522U true CN205225522U (en) | 2016-05-11 |
Family
ID=55900592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520830136.5U Expired - Fee Related CN205225522U (en) | 2015-10-23 | 2015-10-23 | Engine and noise eliminator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205225522U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105221309A (en) * | 2015-10-23 | 2016-01-06 | 衡阳合力工业车辆有限公司 | A kind of motor and silencer |
| CN107587960A (en) * | 2017-09-22 | 2018-01-16 | 杭叉集团股份有限公司 | Intake muffler and diesel fork lift truck |
-
2015
- 2015-10-23 CN CN201520830136.5U patent/CN205225522U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105221309A (en) * | 2015-10-23 | 2016-01-06 | 衡阳合力工业车辆有限公司 | A kind of motor and silencer |
| CN105221309B (en) * | 2015-10-23 | 2018-03-23 | 衡阳合力工业车辆有限公司 | A kind of engine and silencing apparatus |
| CN107587960A (en) * | 2017-09-22 | 2018-01-16 | 杭叉集团股份有限公司 | Intake muffler and diesel fork lift truck |
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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: 20160511 Termination date: 20181023 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |