CN106703959A - Silencer for forklift internal combustion engine - Google Patents
Silencer for forklift internal combustion engine Download PDFInfo
- Publication number
- CN106703959A CN106703959A CN201611245172.0A CN201611245172A CN106703959A CN 106703959 A CN106703959 A CN 106703959A CN 201611245172 A CN201611245172 A CN 201611245172A CN 106703959 A CN106703959 A CN 106703959A
- Authority
- CN
- China
- Prior art keywords
- inner tube
- steel pipe
- air inlet
- outlet
- dividing plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/007—Apparatus used as intake or exhaust silencer
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
Abstract
The invention discloses a silencer for a forklift internal combustion engine. The silencer comprises a shell. The two ends of the shell are provided with end covers. A first partition board and a second partition board are arranged in the shell and divide an inner cavity of the shell into a first resonance chamber, a second resonance chamber and an expansion chamber from left to right. A gas inlet inner pipe is arranged in the first resonance chamber. The top end of the gas inlet inner pipe is connected with a gas inlet steel pipe. The gas inlet steel pipe extends out of the shell. The end of the gas inlet steel pipe is provided with a mounting flange. The second resonance chamber is filled with a resistive sound absorption part. A porous inner pipe is arranged between the first partition board and the second partition board. The two ends of the porous inner pipe extend into the first resonance chamber and the expansion chamber correspondingly. A gas outlet inner pipe is arranged in the expansion chamber. The top end of the gas outlet inner pipe is connected with a gas outlet steel pipe. The gas outlet steel pipe extends out of the shell. The end of the gas outlet steel pipe is provided with a flange. The silencer for the forklift internal combustion engine has the fire extinguishing performance, improves the safety performance, has few components and is low in cost.
Description
Technical field
The present invention relates to fork truck internal combustion engine noise reduction technical field, more particularly to a kind of fork truck muffler for internal combustion engine.
Background technology
As people are to life, the raising of operating environment requirements, noise pollution is also increasingly paid attention to, vehicle noise is to make an uproar
One of important source of sound, therefore it is significant to improving the living and working environment of people to reduce vehicle noise.
The content of the invention
The object of the invention is exactly to make up the defect of prior art, there is provided a kind of fork truck muffler for internal combustion engine.
The present invention is achieved by the following technical solutions：
A kind of fork truck muffler for internal combustion engine, includes housing, and end cap is provided with the two ends of housing, and dividing plate is provided with enclosure interior
One and dividing plate two, described dividing plate one and dividing plate two housing cavity are from left to right divided into resonant chamber one, resonant chamber two and are expanded
Room is opened, air inlet inner tube is provided with described resonant chamber one, the top of air inlet inner tube is connected with air inlet steel pipe, and air inlet steel pipe stretches out
Housing, air inlet steel tube end part is provided with mounting flange, resistive sound-absorbing part is filled with inside described resonant chamber two, in dividing plate one
Porous inner tube is provided with and dividing plate two between, the two ends of more empty inner tube are stretched in resonant chamber one and expansion chambers respectively, in described expansion
Open interior and be provided with outlet inner tube, outlet inner tube top is connected with outlet steel pipe, and outlet steel pipe stretches out housing, at the end of outlet steel pipe
Portion is provided with flange, multiple apertures is had in described air inlet inner tube, porous inner tube and outlet inner tube, in air inlet inner tube
Plug is provided with the bottom of outlet inner tube to seal.
Described resistive sound-absorbing part is glass fibre.
Mounting bracket is separately installed with the end cap at housing two ends.
It is an advantage of the invention that：1st, present invention band extinguishing property, improves security, and internal combustion engine oil is insufficient in burning
In the case of, the materials such as carbon particle, the fuel oil of afterflaming are had, enter muffler with waste gas, it is then discharged out.In such as cotton mill
Deng some the fork truck workplaces that No Open Flames, if spraying the Mars still in burning in fork truck tail gas, serious safety will occur
Accident.Therefore taken into account while during product design in view of noise reduction and gone out except the Mars carried in tail gas, improved fork truck and use safety
Property.
2nd, part of the present invention is few, low cost.The muffler internal innovation using double suction tubular type inner tube and two dividing plates, one
Porous inner tube, just forms impedance complex formula structure, and noise reduction scope covers basic, normal, high band noise, and noise reduction is good, and
The security performance of fire extinguishing is taken into account simultaneously.The internal structure complicated than conventional fork truck muffler for i. c. e, cost is cheaper, but
Same noise reduction can be reached, and using safer.
Brief description of the drawings
Fig. 1 is structural representation of the invention.
Fig. 2 is principle of noise reduction schematic diagram of the present invention.
Fig. 3 is present invention fire extinguishing star principle schematic.
Specific embodiment
As shown in figure 1, a kind of fork truck muffler for internal combustion engine, includes housing 1, end cap 2 is provided with the two ends of housing 1,
Dividing plate 1 and dividing plate 24 are provided with inside housing 1, described dividing plate 1 and dividing plate 24 from left to right splits the inner chamber of housing 1
Into resonant chamber 1, resonant chamber 26 and expansion chambers 7, air inlet inner tube 8, the top of air inlet inner tube 8 are provided with described resonant chamber 1
End is connected with air inlet steel pipe 9, and air inlet steel pipe 9 stretches out housing 1, and the end of air inlet steel pipe 9 is provided with mounting flange 10, in described resonance
The inside of room 26 is filled with resistive sound-absorbing part 11, and porous inner tube 12 is provided between dividing plate 1 and dividing plate 24, more empty inner tube 12
Two ends stretch respectively in resonant chamber 1 and expansion chambers 7, be provided with outlet inner tube 13, outlet inner tube 13 in the described expansion chambers 7
Top is connected with outlet steel pipe 14, and outlet steel pipe 14 stretches out housing 1, and flange 15 is provided with the end of outlet steel pipe 14, in institute
Multiple apertures are had in air inlet inner tube 8, porous inner tube 12 and the outlet inner tube 13 stated, in air inlet inner tube 8 and outlet inner tube
13 bottom is provided with plug sealing.
Described resistive sound-absorbing part 11 is glass fibre.
Mounting bracket 16 is separately installed with the end cap 2 at the two ends of housing 1.
As shown in Fig. 2 noise reduction process：
1st, fork truck combustion in IC engine waste gas is entered inside muffler by muffler air inlet steel pipe, is flowed downward along air inlet inner tube 8,
Because the end of air inlet inner tube 8 has plug to seal, therefore air-flow can only be flowed out by the aperture on pipe shaft, and at this moment air velocity can drop
It is low, lessen the hydrodynamic noise of tail gas.Simultaneously as air-flow can produce vibrations by aperture into resonant chamber 1, and work as gas
During stream vibration, by aperture, the gas in closing chamber is set also to cause vibration, the gas in aperture（Gas column）Also vibrate simultaneously, and
When the vibration frequency in air-flow is identical with the intrinsic frequency of closing chamber, resonate, so as to reduce noise.
2nd, air-flow enters porous inner tube 12 from resonant chamber 1, equally densely covered aperture, a part of air-flow meeting on porous inner tube 12
Flowed out by aperture, into resonant chamber 26, resonated again, reduce noise；Simultaneously as resonant chamber 26 is filled with largely
Glass fibre, air-flow by aperture enter glass fibre during can because friction, the acoustic energy of sound wave is converted into friction
Heat energy, so as to reduce medium, high frequency noise.
3rd, air-flow enters expansion chambers 7 from porous inner tube 12, is then dilated suddenly to a larger chamber by original pipeline
Room, the acoustic impedance in passage can undergo mutation, and the sound wave of some frequencies is can't pass silencer, and be reflected back sound source, so that
Effectively reduce low-frequency noise；
4th, air-flow enters outlet inner tube 13 from expansion chambers 7 by aperture, and air velocity is reduced again, and hydrodynamic noise can also be reduced,
Last waste gas exhaust silencer cylinder.
Finally, by series reactions such as resonant reflection, resistive sound absorption, expansions, exhaust noise is effectively reduced.
As shown in figure 3, fire extinguishing star principle：
The materials such as combustion in IC engine remaining carbon particle, fuel oil, with waste gas by the muffler of air inlet inner tube 8, and with the shape of Mars
State is present.Because there is blocking the end of air inlet inner tube 8, therefore air-flow can only be flowed out by the aperture with official, now air velocity
Can reduce, it is impossible to swimmingly flow out, the Mars in tail gas can not swimmingly flow out, can sustained combustion, one in air inlet inner tube
Part can burn totally, and final ashes fall in the bottom of air inlet inner tube.At this moment, still have Mars and resonance is entered by air inlet inner tube
Room 1, air-flow equally cannot smoothly flow, moving in resonance 1, finally enter porous inner tube.In the process
Also can some Mars cannot be introduced into porous inner tube 12, and burn totally, ashes fall in the bottom of resonant chamber one.
Then, off-gas flows enter porous inner tube, flow backward, and many apertures are provided with porous inner tube, and surrounding is filled up
Fluffy alkali-free glass fibre.
At this moment Mars still remaining in air-flow can be adsorbed from aperture by alkali-free glass fibre, be fired in alkali-free glass fibre
Burn totally, and alkali-free glass fibre has resistant to elevated temperatures feature, so will not be burned.So further fire extinguishing is just reached
Purpose.
Finally, air-flow passes through porous inner tube 12, into expansion chambers 7, because expansion chambers are closed, only one such as suction pipe
Outside the porous inner tube UNICOM of shape.In this structure, the discharge that air-flow will not be much smoother, but first can be collected together everywhere in expansion chambers
It is dynamic, enter inner tube finally by the aperture in outlet inner tube, and then discharge.Remaining Mars can be gradually in waste gas in this course
Gradually extinguish, last ashes fall in expansion chambers bottom, reach and go out except the purpose of Mars.
So pass through, the Mars of remaining in waste gas is gone out and removed, so as to eliminate fire by the effect of quadruple fire extinguishing star structure substantially
The fire incident that star being discharged with tail gas and caused.
Claims (3)
1. a kind of fork truck muffler for internal combustion engine, it is characterised in that：Housing is included, end cap is provided with the two ends of housing, in shell
Internal portion is provided with dividing plate one and dividing plate two, and housing cavity is from left to right divided into resonant chamber by described dividing plate one and dividing plate two
First, resonant chamber two and expansion chambers, air inlet inner tube is provided with described resonant chamber one, and the top of air inlet inner tube is connected with air inlet steel
Pipe, air inlet steel pipe stretches out housing, and air inlet steel tube end part is provided with mounting flange, and resistive suction is filled with inside described resonant chamber two
Part point, is provided with porous inner tube between dividing plate one and dividing plate two, and the two ends of more empty inner tube are stretched in resonant chamber one and expansion respectively
Interior, is provided with outlet inner tube in described expansion chambers, and outlet inner tube top is connected with outlet steel pipe, and outlet steel pipe stretches out shell
Body, flange is provided with the end of outlet steel pipe, is had in described air inlet inner tube, porous inner tube and outlet inner tube many
Individual aperture, plug sealing is provided with the bottom of air inlet inner tube and outlet inner tube.
2. a kind of fork truck muffler for internal combustion engine according to claim 1, it is characterised in that：Described resistive sound-absorbing part
It is glass fibre.
3. a kind of fork truck muffler for internal combustion engine according to claim 1, it is characterised in that：On the end cap at housing two ends
It is separately installed with mounting bracket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611245172.0A CN106703959A (en) | 2016-12-29 | 2016-12-29 | Silencer for forklift internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611245172.0A CN106703959A (en) | 2016-12-29 | 2016-12-29 | Silencer for forklift internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106703959A true CN106703959A (en) | 2017-05-24 |
Family
ID=58903966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611245172.0A Pending CN106703959A (en) | 2016-12-29 | 2016-12-29 | Silencer for forklift internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106703959A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023124300A1 (en) * | 2021-12-29 | 2023-07-06 | 中车大连机车研究所有限公司 | Emptying silencer of magnetic suspension air blower for sewage treatment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201461036U (en) * | 2009-08-14 | 2010-05-12 | 诸城市海得威机械有限公司 | Composite exhaust muffler with low backpressure impedance for heavy-duty truck |
| CN206376919U (en) * | 2016-12-29 | 2017-08-04 | 合肥汇凌汽车零部件有限公司 | A kind of fork truck muffler for internal combustion engine |
-
2016
- 2016-12-29 CN CN201611245172.0A patent/CN106703959A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201461036U (en) * | 2009-08-14 | 2010-05-12 | 诸城市海得威机械有限公司 | Composite exhaust muffler with low backpressure impedance for heavy-duty truck |
| CN206376919U (en) * | 2016-12-29 | 2017-08-04 | 合肥汇凌汽车零部件有限公司 | A kind of fork truck muffler for internal combustion engine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023124300A1 (en) * | 2021-12-29 | 2023-07-06 | 中车大连机车研究所有限公司 | Emptying silencer of magnetic suspension air blower for sewage treatment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1137328C (en) | Muffler for internal combustion engine | |
| CN102606269A (en) | Impedance composite muffler | |
| CN101871473B (en) | Impedance composite muffler | |
| CN206376919U (en) | A kind of fork truck muffler for internal combustion engine | |
| CN2921306Y (en) | Impedance composite noise silencer | |
| CN207212433U (en) | A kind of diesel engine commercial affairs sound eliminator for automobile | |
| CN106703959A (en) | Silencer for forklift internal combustion engine | |
| CN105134337B (en) | A kind of automobile exhaust muffler | |
| CN106401697A (en) | Complex silencer for diesel generator unit | |
| CN210370852U (en) | Engine silencer | |
| CN208702494U (en) | A kind of mobile muffler shell that soundproof effect is good | |
| CN112576337A (en) | Broadband low-flow-resistance spark flameout silencer | |
| CN102359407A (en) | Multi-cavity labyrinth silencer | |
| CN212296575U (en) | Labyrinth type low-emission cooling silencer for small gasoline engine | |
| CN206429304U (en) | A kind of sound insulation of engine, noise reduction, exhaust treatment system | |
| CN205840960U (en) | A kind of smoke evacuation Mars extinguishes acoustic filter | |
| CN201884096U (en) | Foamed aluminium automobile internal-combustion engine exhaust silencer | |
| CN205591983U (en) | Exhaust is eliminated noise and is filtered fire prevention composite set | |
| CN202578842U (en) | Dissipation and resistance compound type muffler | |
| CN112523852A (en) | Tail gas purification and noise elimination system for generator set and working method | |
| CN105626208A (en) | Cylindrical catalyst silencer | |
| RU111195U1 (en) | SILENCER-NEUTRALIZER EXHAUST EXHAUST GASES OF INTERNAL COMBUSTION ENGINE | |
| CN112576336A (en) | Spark extinguishing silencer with resonant cavity | |
| CN207111201U (en) | A kind of film column type vehicle exhaust muffler | |
| CN201321885Y (en) | High-pressure exhausting silencer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170524 |
|
| RJ01 | Rejection of invention patent application after publication |