CN107435588A - Noise reduction mozzle and engineering machinery - Google Patents
Noise reduction mozzle and engineering machinery Download PDFInfo
- Publication number
- CN107435588A CN107435588A CN201710817629.9A CN201710817629A CN107435588A CN 107435588 A CN107435588 A CN 107435588A CN 201710817629 A CN201710817629 A CN 201710817629A CN 107435588 A CN107435588 A CN 107435588A
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- CN
- China
- Prior art keywords
- outer tube
- noise reduction
- mozzle
- inner tube
- tube
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- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/11—Thermal or acoustic insulation
- F02B77/13—Acoustic insulation
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
Abstract
The present invention relates to technical field of engineering machinery, more particularly to a kind of noise reduction mozzle and engineering machinery for being used to reduce engine noise.Noise reduction mozzle includes the outer tube and inner tube being arranged in engine power hatch cover, and inner tube is stretched into outer tube and is connected with outer tube, and diameter of inner pipe is less than muffler tail pipe diameter, and said inner tube is located at the surface of muffler tail pipe.Noise reduction mozzle includes outer tube and inner tube in the present invention, and then can effectively solve because noise build up problem caused by the gas column of intrinsic frequency.The diameter for being located at the surface of muffler tail pipe and inner tube due to inner tube is less than the diameter of muffler tail pipe, therefore be not in volumetric expansion after gas enters in noise reduction mozzle, enter the problem of diminishing without generation speed, pressure, into the gas fast response time in noise reduction mozzle, it can upwards exclude in time, gas backflow will not be made to enter enging cabin.
Description
Technical field
The present invention relates to technical field of engineering machinery, more particularly to a kind of noise reduction mozzle for being used to reduce engine noise
Engineering machinery.
Background technology
The working environment of engineering machinery is more severe, and its engine often works under high power operating mode, engine
The temperature in cabin is higher, to ensure that engine work well needs cooling fan to carry out air-supply radiating.Simultaneously because engineering machinery is made an uproar
Sound is big, needs to carry out enging cabin into appropriate encapsulation to control engine noise to propagate.Thus, noise is controlled with reducing machine
Contradiction be present between the temperature of cabin.
Tail gas is passed through air by the engine of Traditional project machinery by the way of silencer is directly vented, this mode
High-temperature gas can only drive air-flow to be discharged by radiator fan in enging cabin, but the main function of fan is to radiator
Cooling, it is relatively small to the flow perturbation of enging cabin, it is desirable to and reach needs to improve rotation speed of the fan to the purpose of cabin cooling, this
Sample energy consumption can greatly increase, and fan noise can also improve.Modern engineering machinery is radiated using a kind of induction tunnel auxiliary engine room more,
A pipe is installed additional in nacelle top, its bottom communicates with cabin, and engine exhaust is taken away after entering pipe using flow inertance
Part cabin gas is to reach cooling purpose.
But single one straight pipe has many shortcomings as induction tunnel：First, it is regular shape in straight pipe
There is intrinsic frequency increase that will empathize when being vented forcing frequency and being overlapped with air-column inherent frequency to make an uproar for air column, gas column
Sound, discharged in engine exhaust with certain frequency, and the noise of various frequencies in being vented be present, easily empathize so that
Exhaust noise expands；Secondly, injection pipe diameter is more than muffler tail pipe, and gas enters volumetric expansion after induction tunnel, speed, pressure
Power diminishes.When variable working condition especially accelerates, extraction flow increases, because gas response is slower in induction tunnel, it is impossible in time upwards
Discharge, the gas flowing that muffler tail pipe can be hindered to export, exhaust, which is flow backwards, enters enging cabin.
Therefore, it is necessary to which a kind of noise reduction mozzle, can solve the problem that induction tunnel easily causes exhaust noise expansion in the prior art
And the problem of gas response is slower in induction tunnel.
The content of the invention
It is an object of the invention to propose a kind of noise reduction mozzle, it can solve the problem that induction tunnel easily causes row in the prior art
The problem of gas noise expands and gas response is slower in induction tunnel.
The present invention also aims to propose a kind of engineering machinery, engineering machinery exhaust noise in the prior art can solve the problem that
Expand and gas responds the problem of slower in induction tunnel.
To use following technical scheme up to this purpose, the present invention：
A kind of noise reduction mozzle is provided, including：
Outer tube, it is arranged in engine power hatch cover；
Inner tube, it stretches into the outer tube and is connected with the outer tube, and said inner tube diameter is less than muffler tail pipe diameter,
And said inner tube is located at the surface of the muffler tail pipe.
Preferably, also including exocoel closed component, the exocoel closed component can be according to making capacity size
Outer tube is connected or separated with engine power hatch cover.
Preferably, the exocoel closed component includes guide vane and runner assembly, the guide vane passes through rotation
Component can be rotatablely connected with the outer tube.
Preferably, multiple guide vanes are arranged on the madial wall of the outer tube, and multiple guide vanes
Loop configuration is formed, the exocoel that the loop configuration is formed with said inner tube with outer tube matches.
Preferably, connected between the outer tube and said inner tube by the connecting plate no less than one.
Preferably, the inner chamber of said inner tube is stairstepping.
Preferably, the inner chamber of the outer tube is stairstepping.
Preferably, water conservancy diversion canalis spinalis is additionally provided between the outer tube and engine power hatch cover.
Present invention also offers a kind of engineering machinery, including noise reduction mozzle described above.
Preferably, the engineering machinery is bull-dozer.
Beneficial effect of the present invention：
Noise reduction mozzle includes outer tube and inner tube in the present invention, and then can effectively solve the gas because intrinsic frequency
Noise build up problem caused by post.The diameter for being located at the surface of muffler tail pipe and inner tube due to inner tube is less than muffler tail pipe
Diameter, therefore gas enter in noise reduction mozzle after be not in volumetric expansion, enter and diminish without speed, pressure occurs
It problem, into the gas fast response time in noise reduction mozzle, can upwards exclude in time, will not enter gas backflow and start
Cabin.
The purpose for setting exocoel closed component is that inner and outer pipes can be made to have different intrinsic frequencies, can be in whole work
In the range of effectively avoid being vented the resonance in noise reduction mozzle again, reduce the exhaust noise of bull-dozer.
Exocoel closed component includes guide vane and runner assembly, and this kind of structure is not in make an uproar in vanes close outer tube
Sound, further reduce engine noise.
Multiple guide vanes are arranged on the madial wall of outer tube, and because guide vane quantity is multiple, therefore, it is being rotated
The problem of Shi Buhui is obstructed.Meanwhile multiple guide vanes form a loop configuration, and match with exocoel, can be effective
Exocoel and engine power hatch cover hot gas escape orifice are separated.
Guide vane is arranged on the madial wall of outer tube by runner assembly, and then guide vane can be ensured according to gas
Flow rotates.
Inner tube is step type, and the eigentone of its interior each diameter change section of intracavitary and the inner tube bottom can be made straight
The related gas column eigentone in footpath is different, avoids the resonance of gas column in inner tube.
Outer tube and inner tube are stairstepping, and it is irregular shape gas column that can make the chamber shape of outer tube and inner tube, and then can
Prevent exhaust forcing frequency overlaps with air-column inherent frequency from empathizing.
The purpose for setting water conservancy diversion Taper Pipe is then to be able to hot gas water conservancy diversion in engine power hatch cover.
A kind of engineering machinery provided by the invention, can effectively solve because noise increases caused by the gas column of intrinsic frequency
Big problem；Gas measure hour enter noise reduction mozzle in be not in volumetric expansion the problem of, while also be not in hinder
The problem of noise reduction draft tube outlets gas flows.
Brief description of the drawings
Fig. 1 is the structural representation of noise reduction mozzle provided by the invention；
Fig. 2 is the structural representation of a kind of inner tube provided by the invention and outer tube；
Fig. 3 is the structural representation of another inner tube provided by the invention and outer tube；
Fig. 4 is a kind of section view at A-A in Fig. 1；
Fig. 5 is a kind of section view at A-A in Fig. 1；
Fig. 6 is a kind of section view at A-A in Fig. 1.
In figure：
1st, outer tube；2nd, inner tube；3rd, guide vane；4th, runner assembly；5th, connecting plate；6th, water conservancy diversion Taper Pipe；7th, engine power
Hatch cover；8th, mounting flange；9th, exocoel；10th, inner chamber；11st, muffler tail pipe.
Embodiment
In order that those skilled in the art more fully understand technical scheme, below in conjunction with the accompanying drawings and by specific
Embodiment further illustrates technical scheme.
A kind of noise reduction mozzle is provided in the present embodiment, can solve the problem that induction tunnel exhaust easily occurs and made an uproar in the prior art
Sound expands and its interior gas responds the problem of slower.As shown in figure 1, the noise reduction mozzle includes outer tube 1, stretched into outer tube 1
Inner tube 2 and exocoel closed component；Wherein, outer tube 1 is arranged in engine power hatch cover 7；Inner tube 2 stretches into same in outer tube 1
When be also connected with outer tube 1, specially connected between outer tube 1 and inner tube 2 by the connecting plate 5 no less than one, and inner tube 2 is located at
The surface of muffler tail pipe 11；Exocoel closed component can make the outer tube and engine power hatch cover according to capacity size
Connection separates, and exocoel closed component includes guide vane 3 and runner assembly in the present embodiment, and guide vane 3 is arranged on outer tube 1
With the bottom of inner tube 2, exocoel 9 and engine power hatch cover 7 for inner tube 2 to be formed with outer tube 1 separate, and guide vane 3
It can be opened or closed according to capacity size.
Exocoel closed component is probably closing valve plug in other embodiment, and the closing valve plug can be according to gas flow size
Lifting, i.e., when flow is smaller, closing valve plug separates inner tube and engine by self gravitation, when flow is larger, closes valve
Plug is risen by upward air-flow " lift ", and then engine is connected with outer tube 1.It should be noted that closing valve plug bottom shape is
" V " shape structure, the import for the exocoel that outer tube 1 is formed with inner tube is also " V " shape structure.
It should be noted that water conservancy diversion canalis spinalis 6 is provided between outer tube 1 and engine power hatch cover 7, to be produced to engine
Raw hot gas plays guiding function, enable hot gas detached from engine hatch cover after enter inner tube 2 or enter inner tube 2 with
In outer tube 1, the diameter of its middle external tube 1 is less than the hot gas escape orifice (not shown) of engine power hatch cover 7, and water conservancy diversion canalis spinalis 6
Big end the hot gas escape orifice surrounding of engine power hatch cover 7 is arranged on by mounting flange 8, and the small end of water conservancy diversion canalis spinalis 6 then with
Outer tube 1 connects, and specific connected mode is welding.Water conservancy diversion Taper Pipe in the present invention, it is stream between engine power hatch cover and inner and outer pipe
Line style transition, this kind of transient mode play certain guide effect to air-flow, greatly reduce the flow resistance of enging cabin hot-air.
Asked in order to solve gas in the prior art into what speed and pressure caused by induction tunnel volumetric expansion diminished
Topic, the diameter of inner tube 2 are less than muffler tail pipe 11, because the diameter of the present embodiment middle external tube 1 is more than the straight of muffler tail pipe 11
Footpath, the exocoel 9 that outer tube 1 is formed with inner tube 2 is closed therefore, multiple guide vanes 3 are arranged on the madial wall of outer tube 1, works as gas
During the scale of construction smaller (i.e. inside and outside differential pressure is smaller), multiple guide vanes 3 can be effectively by exocoel 9 and the heat of engine power hatch cover 7
Gas escape orifice separates, and gas is shed by the inner chamber 10 of inner tube 2, and multiple guide vanes 3 form loop configuration either
Structure shaped like round platform, the loop configuration match with exocoel 9.As shown in figure 1, the structure that multiple guide vanes 3 are formed is circle
Mesa-shaped structure, certain angle between guide vane 3 and horizontal plane be present, angle angular range is at 0~90 °.
Specifically, each guide vane 3 is arranged on the madial wall of outer tube 1 by runner assembly 4.Wherein guide vane
3 quantity should be no less than three, and the quantity of guide vane 3 is limited and is no less than three, is in order that guide vane 3 can be without hindrance
Rotation, when guide vane 3 be two when, guide vane 3 is whether rotated or installed and can all have difficulties, and water conservancy diversion leaf
The quantity of piece 3, which is three, makes installation number not increase, while guide vane 3 also can be in time according to the increase nothing of gas flow
The opening of obstruction.Runner assembly 4 includes rotating shaft and spring, wherein spring is torsion spring, and rotating shaft is initially passed through in torsion spring, then rotating shaft
Both ends are connected with guide vane 3 again, and said structure can be realized as the rotation of guide vane 3.
Inner and outer pipe is caused to resonate in order to prevent in inner and outer pipe that gas column eigentone is identical, the present embodiment middle external tube 1
And/or the inner chamber of inner tube 2 is stairstepping.1 two inner tube 2, outer tube chambers have different eigentones respectively, according to exhaust
After flow optimization design structure parameter, it can effectively avoid being vented the resonance in drainage system again, drop in whole working ranges
The low exhaust noise of bull-dozer.When the inner chamber of outer tube 1 and inner tube 2 is stairstepping, following two situations be present：
As shown in Fig. 2 the side wall that each madial wall of inner tube 2 is corresponding with an outer tube 1 is in parallel, i.e. the He of inner tube 2
The cavity shape of outer tube 1 changes in regular, i.e., the angle of inclination all same of each inclined inside wall；
As shown in figure 3, the non-parallel setting between the inclined inside wall of outer tube 1 of each inclined inside wall of inner tube 2, should
Kind set-up mode is without regularity；The angle of inclination of i.e. each inclined inside wall is different.
The inner chamber of inner tube 2 and/or outer tube 1 is stepped in the present embodiment, and the cavity that inner tube 2 is formed with outer tube 1 passes through
Guide vane 3 carries out current limliting to gas, and said structure, which is combined, can effectively reduce the problem of inner and outer pipes exhaust noise is big；Together
When, the diameter of inner tube 2 is less than the diameter of muffler tail pipe 11, and this kind of set-up mode can effectively avoid gas response speed
Slowly, it is impossible to the problem of excluding in time.
Connected between outer tube 1 and inner tube 2 by the connecting plate 5 no less than one, the quantity of wherein connecting plate 5 is chosen as one
It is individual, two, three or four, two, three and four connecting plates are set respectively as Figure 4-Figure 6, between outer tube 1 and inner tube 2
5, preferably, setting three connecting plates 5 between outer tube 1 and inner tube 2 in the present embodiment.Connecting plate 5 is by outer tube 1 and the shape of inner tube 2
Into exocoel 9 be separated into the quantity identical chamber of connecting plate 5, because the chamber of outer tube 1 and inner tube 2 is stepped, this kind
Shape can avoid the air column resonance in each chamber of outer tube 1.Inner tube 2, outer tube 1 have different intrinsic vibration frequencies respectively
Rate, after extraction flow optimization design structural parameters, can effectively it be avoided in noise reduction mozzle in whole working ranges
Resonance, reduce the exhaust noise of bull-dozer.
A kind of engineering machinery, including the noise reduction mozzle provided in the present embodiment are additionally provided in the present embodiment.
Wherein, engineering machinery is bull-dozer, can also be excavator or farm machinery certainly.
The engineering machinery provided in the present embodiment, in the course of the work exhaust noise can be avoided to expand, and can solve the problem that
The problem of gas response speed is slower in the prior art.
Pay attention to, the general principle and principal character and advantages of the present invention of the present invention has been shown and described above.The industry
Technical staff it should be appreciated that the present invention is not limited to the embodiments described above, described in above-mentioned embodiment and specification
Merely illustrate the principles of the invention, without departing from the spirit and scope of the present invention, the present invention also have various change and
Improve, these changes and improvements all fall within the protetion scope of the claimed invention, and claimed scope of the invention is by appended
Claims and its equivalent thereof.
Claims (10)
- A kind of 1. noise reduction mozzle, it is characterised in that including：Outer tube (1), it is arranged in engine power hatch cover (7)；Inner tube (2), it stretches into the outer tube (1) and is connected with the outer tube (1), and said inner tube (2) diameter is less than silencer Tail pipe (11) diameter, and said inner tube (2) is located at the surface of the muffler tail pipe (11).
- 2. noise reduction mozzle according to claim 1, it is characterised in that also including exocoel closed component, the exocoel envelope Closing component can make the outer tube (1) connect or separate with engine power hatch cover (7) according to capacity size.
- 3. noise reduction mozzle according to claim 2, it is characterised in that the exocoel closed component includes guide vane (3) it is rotatablely connected with runner assembly, the guide vane (3) by runner assembly and the outer tube (1).
- 4. noise reduction mozzle according to claim 3, it is characterised in that multiple guide vanes (3) are arranged on described On the madial wall of outer tube (1), and multiple guide vanes (3) form loop configuration, the loop configuration and said inner tube (2) The exocoel (9) formed with outer tube (1) matches.
- 5. noise reduction mozzle according to claim 2, it is characterised in that lead between the outer tube (1) and said inner tube (2) The connecting plate (5) no less than one is crossed to connect.
- 6. noise reduction mozzle according to claim 1, it is characterised in that the inner chamber of said inner tube (2) is stairstepping.
- 7. the noise reduction mozzle according to claim 1 or 6, it is characterised in that the inner chamber of the outer tube (1) is stairstepping.
- 8. noise reduction mozzle according to claim 6, it is characterised in that the outer tube (1) and engine power hatch cover (7) Between be additionally provided with water conservancy diversion Taper Pipe (6).
- 9. a kind of engineering machinery, it is characterised in that including the noise reduction mozzle as described in claim any one of 1-8.
- 10. engineering machinery according to claim 9, it is characterised in that the engineering machinery is bull-dozer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710817629.9A CN107435588A (en) | 2017-09-12 | 2017-09-12 | Noise reduction mozzle and engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710817629.9A CN107435588A (en) | 2017-09-12 | 2017-09-12 | Noise reduction mozzle and engineering machinery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107435588A true CN107435588A (en) | 2017-12-05 |
Family
ID=60462038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710817629.9A Pending CN107435588A (en) | 2017-09-12 | 2017-09-12 | Noise reduction mozzle and engineering machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107435588A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002097951A (en) * | 2000-09-27 | 2002-04-05 | Hitachi Constr Mach Co Ltd | Exhaust device of construction machinery |
| JP2005214150A (en) * | 2004-02-02 | 2005-08-11 | Yamaha Motor Co Ltd | Muffler for engine |
| CN205047275U (en) * | 2015-09-16 | 2016-02-24 | 广西汽车集团有限公司 | Silencer for use in automobile |
| CN105351055A (en) * | 2015-11-19 | 2016-02-24 | 山东大学 | Exhaust entrainment device of engine compartment and optimization method |
| CN106255811A (en) * | 2014-04-28 | 2016-12-21 | 双叶产业株式会社 | Deafener |
-
2017
- 2017-09-12 CN CN201710817629.9A patent/CN107435588A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002097951A (en) * | 2000-09-27 | 2002-04-05 | Hitachi Constr Mach Co Ltd | Exhaust device of construction machinery |
| JP2005214150A (en) * | 2004-02-02 | 2005-08-11 | Yamaha Motor Co Ltd | Muffler for engine |
| CN106255811A (en) * | 2014-04-28 | 2016-12-21 | 双叶产业株式会社 | Deafener |
| CN205047275U (en) * | 2015-09-16 | 2016-02-24 | 广西汽车集团有限公司 | Silencer for use in automobile |
| CN105351055A (en) * | 2015-11-19 | 2016-02-24 | 山东大学 | Exhaust entrainment device of engine compartment and optimization method |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20171205 |