CN102720577B - Exhaust system for crane - Google Patents
Exhaust system for crane Download PDFInfo
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- CN102720577B CN102720577B CN201210210397.8A CN201210210397A CN102720577B CN 102720577 B CN102720577 B CN 102720577B CN 201210210397 A CN201210210397 A CN 201210210397A CN 102720577 B CN102720577 B CN 102720577B
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- tailpipe
- silencing apparatus
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- outlet pipes
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Abstract
The invention discloses an exhaust system for a crane. The exhaust system comprises an exhaust branch pipe and at least one exhaust pipe, wherein each exhaust pipe comprises an exhaust front pipe, an exhaust corrugated pipe and an exhaust tail pipe, which are connected in sequence; and a first muffler is arranged in the exhaust corrugated pipe and a second muffler is arranged in the exhaust tail pipe. The exhaust branch pipe is connected with the exhaust front pipe of the exhaust pipe, so that the exhaust gas generated in the cylinder body of an engine enters the exhaust pipe. In the exhaust pipe, the exhaust gas goes through the exhaust front pipe, the exhaust corrugated pipe and the exhaust tail pipe in sequence and is discharged through the exit of the exhaust tail pipe, wherein the first muffler performs the first noise elimination treatment on the exhaust noise in the exhaust corrugated pipe, and the second muffler performs the second noise elimination treatment on the exhaust noise in the exhaust tail pipe. Accordingly, the exhaust system can enhance the noise reduction effect by means of step-by-step noise elimination and decompose exhaust pulsation by increasing the exhaust flow, so as to suppress exhaust noise.
Description
Technical field
The present invention relates to control field, particularly relate to a kind of exhaust system for crane.
Background technique
Vent systems refers to collection and the system of discharging waste gas, is generally made up of parts such as exhaust branch pipe, outlet pipe and silencing apparatuss.Vent systems mainly discharges the waste gas that engine operation is discharged, and makes the exhaust emission pollution of discharge reduce noise simultaneously and reduces.The controlling method of noise mainly comprises the absorption, reflection, vibration isolation, the change direction of propagation etc. of noise.
The exhaust sound of exhaust system for crane Noise measarement and general automobile controls that there is some difference, on the one hand because hoist should meet drive performance, the cross-country ability of vehicle, meet hoist long working performance continuously again, therefore hoist producer selects the power assembly system that volume is large, quality heavy, output torque is large usually, thus adds the discharge capacity of vent systems; On the other hand due to the structural feature of hoist self, namely motor and gearbox are connected with oil hydraulic pump, vibration source is indirectly caused to increase, thus make exhaust system for crane noise reduction arrangement more complicated, the unreasonable noise radiation often causing exhaust sound and whole bodywork system of arrangement.
Present stage exhaust system for crane arrangement as shown in Figure 1, vent systems comprises exhaust branch pipe 1 and outlet pipe 2, wherein outlet pipe 2 comprises the rear pipe 23 of exhaust front pipe 21, bellows 22 and exhaust, after exhaust, be provided with silencing apparatus 24 in pipe, wherein bellows 22 has the effect of the body vibration of isolated motor 11.Toxic emission process is: waste gas flows through exhaust branch pipe 1 through turbosupercharger, afterwards after exhaust front pipe 21 and bellows 22, enters the silencing apparatus 24 in the rear pipe 23 of exhaust, discharges after carrying out simple noise reduction process in silencing apparatus 24.This arrangement can play certain Noise Reduction for the less system of extraction flow, but for the exhaust system for crane of huge discharge, its noise reduction energy can not meet the demands, simultaneously outlet pipe there will be vibration because of exhaust gas pulses, cause outlet pipe afterbody occur " drone " boom, noise reduction cannot reach corresponding requirements.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of exhaust system for crane, by using multiple exhausting loop to be exhausted, thus increasing extraction flow, decomposing exhaust gas pulses, suppress exhaust sound; Multiple baffler is set in outlet pipe to carry out noise reduction step by step simultaneously, thus strengthens noise reduction.
According to a kind of exhaust system for crane provided by the invention, comprise: exhaust branch pipe, at least one outlet pipe, at least one outlet pipe wherein said comprises the exhaust front pipe, exhaust expansion bellows and the tailpipe that connect successively respectively, first silencing apparatus is set in exhaust expansion bellows, second silencing apparatus is set in tailpipe, wherein:
Exhaust branch pipe is connected with the exhaust front pipe of at least one outlet pipe described, thus makes the waste gas produced in engine cylinder-body enter at least one outlet pipe described;
In at least one outlet pipe described, waste gas is successively by exhaust front pipe, exhaust expansion bellows and tailpipe, and discharged by the outlet of tailpipe, wherein the first silencing apparatus carries out the first noise elimination process to the exhaust sound in exhaust expansion bellows, and the second silencing apparatus carries out the second noise elimination process to the exhaust sound in tailpipe.
The present invention, by waste gas is entered at least one outlet pipe, arranges multiple silencing apparatus simultaneously in each outlet pipe, thus can pass through the enhancing of noise reduction step by step noise reduction, and by increasing extraction flow to decompose exhaust gas pulses, thus effectively suppress exhaust sound.
Description of the invention provides in order to example with for the purpose of describing, and is not exhaustively or limit the invention to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Selecting and describing embodiment is in order to principle of the present invention and practical application are better described, and enables those of ordinary skill in the art understand the present invention thus design the various embodiments with various amendment being suitable for special-purpose.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of exhaust system for crane in prior art.
Fig. 2 is the schematic diagram of an exhaust system for crane of the present invention embodiment.
Fig. 3 is the schematic diagram of a resonance noise elimination device of the present invention embodiment.
Fig. 4 is the schematic diagram of a vibration isolator of the present invention embodiment.
Fig. 5 is the schematic diagram of another embodiment of exhaust system for crane of the present invention.
Embodiment
With reference to the accompanying drawings the present invention is described more fully, exemplary embodiment of the present invention is wherein described.
Fig. 2 is the schematic diagram of an exhaust system for crane of the present invention embodiment.As shown in Figure 2, exhaust system for crane comprises exhaust branch pipe 1, at least one outlet pipe 2, at least one outlet pipe 2 wherein said comprises the exhaust front pipe 21, exhaust expansion bellows 22 and the tailpipe 23 that connect successively respectively, first silencing apparatus 3 is set in exhaust expansion bellows 22, the second silencing apparatus 4 is set in tailpipe 23.Wherein: exhaust branch pipe 1 is connected with the exhaust front pipe 21 of at least one outlet pipe 2 described, thus make the waste gas produced in motor 11 cylinder body enter at least one outlet pipe 2 described.In at least one outlet pipe 2 described, waste gas is successively by exhaust front pipe 21, exhaust expansion bellows 22 and tailpipe 23, and discharged by the outlet of tailpipe 23, exhaust sound wherein in the first silencing apparatus 3 pairs of exhaust expansion bellowses carries out the first noise elimination process, and the exhaust sound in the second silencing apparatus 4 pairs tailpipe carries out the second noise elimination process.For brevity, illustrate only an outlet pipe in fig. 2.
Based on the exhaust system for crane shown in the above embodiment of the present invention, by waste gas is entered at least one outlet pipe, multiple silencing apparatus is set in each outlet pipe simultaneously, thus the enhancing of noise reduction step by step noise reduction can be passed through, and by increasing extraction flow to decompose exhaust gas pulses, thus suppress exhaust sound.
Preferably, in the exhaust front pipe of at least one outlet pipe described, also there is the 3rd silencing apparatus, for carrying out the 3rd noise elimination process to the exhaust sound in exhaust front pipe.By arranging multiple silencing apparatus in outlet pipe, noise reduction can be strengthened further.
Preferably, the shell of described first silencing apparatus, the second silencing apparatus and the 3rd silencing apparatus is irregularly shaped.By utilizing such as watt hood-like erose shell, noise can be dispersed to all directions, thus change sound direction of wave travel and path of propagation, contribute to the propagation suppressing silencing apparatus internal noise, noise radiation can be reduced further.
Preferably, the first silencing apparatus is positioned at the middle part of exhaust expansion bellows, and exhaust expansion bellows is arranged on flywheel shell of engine dead astern.Because the vibration noise in flywheel housing of an region is larger, the negative effect of vibration to noise reduction of motor therefore effectively can be suppressed by exhaust expansion bellows.First silencing apparatus is positioned at the middle part of exhaust expansion bellows simultaneously, the vibration of motor can be isolated further.
Preferably, in order to reduce exhaust sound further, the first silencing apparatus can be resonance noise elimination device.As a preferred embodiment, first silencing apparatus has resonance lateral tube and the adjustable resonant chamber of cavity volume size, gas in resonance lateral tube and the gas in resonant chamber form spring mass system, to produce resonance interference to the exhaust sound in exhaust expansion bellows, thus the first noise elimination process is carried out to the exhaust sound in exhaust expansion bellows, wherein the frequency range of resonance interference is directly proportional to the cavity volume size of resonant chamber and resonance lateral tube length.
The structure of a resonance noise elimination device embodiment as shown in Figure 3.As shown in Figure 3, resonance noise elimination device is made up of conventional silencing apparatus 30 and resonant chamber 31, resonance lateral tube 32, limiting stopper 33, adjusting piston device 34, piston apparatus adjusting nut 35, its regulating method is for turning on piston apparatus adjusting nut 35, piston is mobile in the other direction to air inlet, thus change the size of resonant chamber 31 cavity volume, gas in resonance lateral tube forms spring mass system with the gas being free on closed containing cavity, form interference to exhaust sound, its frequency range is directly proportional to lateral tube length, closed containing cavity volume.The hyperextension of adjusting flexible plug device can be limited by limiting stopper, thus play certain protective action.Wherein in figure 3, right side is airintake direction, and left side is outgassing direction.
Preferably, in the tailpipe of at least one outlet pipe described, at the suction port of the second silencing apparatus and/or air outlet place, tailpipe vibration isolator is set, for suppressing exhaust gas pulses.
Because the direction of propagation of waste gas in tailpipe is identical with region, the engine noise direction of propagation, therefore very easily cause exhaust gas pulses in this region, exhaust gas pulses frequency belongs to dither, therefore by arranging vibration isolator, effectively can suppress exhaust gas pulses.
As shown in Figure 4, tailpipe vibration isolator is made up of outlet pipe vibrationproof circle 41, vibration isolation rubber layer 42, vibration isolation nylon block 43, clamping bolt 44 structure of a tailpipe vibration isolator embodiment.Vibrationproof circle 41 and vibration isolation rubber layer 42, vibration isolation nylon block 43 form two-stage vibration isolation device, thus prevent exhaust gas pulses from externally with in vehicle frame spreading.Rubber and nylon block is adopted to be because this material is applicable to dither.Exhaust gas pulses can produce certain vibrational excitation, forms first time vibration isolation, carries out two-stage vibration isolation again through nylon block, thus restrained effectively exhaust gas pulses and be delivered in frame system and frame by rubber layer.
Preferably, exhaust system for crane also has the tailpipe acoustic hood of the tailpipe comprising at least one outlet pipe described.By arranging tailpipe acoustic hood, the noise suppressing motor to produce can be further used for.
Preferably, tailpipe cushion rubber bumper is also set in the outlet port of the tailpipe of at least one outlet pipe described, for suppressing exhaust gas pulses.
Preferably, in the exhaust front pipe ingress of at least one outlet pipe described, also catalyst is set, for carrying out purified treatment to waste gas.By carrying out purified treatment to waste gas, reduction exhaust gas pulses can be helped.
Preferably, circulating valve is set in exhaust branch pipe, for the portion produced in engine cylinder-body circulation being entered the suction tude of motor.Waste gas circulation can reduce waste gas discharge capacity, reduces harmful matter NO, NO
2deng the concentration of compound, contribute to suppressing exhaust gas pulses simultaneously.
Provide a specific embodiment of exhaust system for crane below.
Fig. 5 is the schematic diagram of another embodiment of exhaust system for crane of the present invention.In the embodiment shown in fig. 5, exhaust system for crane adopts double-exhaust loop, namely uses two outlet pipes to be exhausted.
As shown in Figure 5, exhaust system for crane comprises exhaust branch pipe 1, two outlet pipes 2, wherein each outlet pipe 2 comprises the exhaust front pipe 21, exhaust expansion bellows 22 and the tailpipe 23 that connect successively respectively, first silencing apparatus 3 is set in exhaust expansion bellows 22, second silencing apparatus 4 is set in tailpipe 23, the 3rd silencing apparatus 5 is set in exhaust front pipe 21.Wherein the shell of the first silencing apparatus 3, second silencing apparatus 4 and the 3rd silencing apparatus 5 is irregularly shaped.First silencing apparatus 3 can be the silencing apparatus shown in Fig. 3, and the first silencing apparatus 3 is positioned at the middle part of exhaust expansion bellows 22, and exhaust expansion bellows 22 is arranged on motor 11 flywheel casing dead astern.In tailpipe 23, tailpipe vibration isolator 6 is set at the suction port of the second silencing apparatus 4 and air outlet place, tailpipe cushion rubber bumper 7 is also set in the outlet port of tailpipe 23.Vent systems also has the tailpipe acoustic hood 8 comprising whole two tailpipes 23.Catalyst 9 and circulating valve (not illustrating in the drawings) are also set in exhaust front pipe 21 ingress.
By implementing the present invention, following technique effect can be obtained:
1, apply many exhausting loops, can extraction flow be increased, reduce the pressure in vent systems, decompose exhaust gas pulses, inhibitory action is played to exhaust sound;
2, adopt many silencing apparatuss to eliminate the noise step by step, can noise reduction be improved;
3, resonance is adopted to silencing apparatus, the interference noise of different frequency can be produced in resonant chamber, interference is caused to exhaust sound, can noise reduction be improved, be specially adapted to the rough-terrain crane that exhaust sound is larger;
4, apply EGR and can reduce exhaust gas pulses;
5, the shell of silencing apparatus is changed into irregularly shaped, contribute to restraint speckle at silencing apparatus internal communication;
6, at tailpipe, vibration isolator is installed, can exhaust gas pulses be suppressed, reduce exhaust sound radiation.
Claims (2)
1. an exhaust system for crane, it is characterized in that, comprise: exhaust branch pipe, two outlet pipes, wherein said two outlet pipes comprise the exhaust front pipe, exhaust expansion bellows and the tailpipe that connect successively respectively, and in exhaust expansion bellows, arrange the first silencing apparatus, the first silencing apparatus is positioned at the middle part of exhaust expansion bellows, exhaust expansion bellows is arranged on flywheel shell of engine dead astern, second silencing apparatus is set in tailpipe, also there is the 3rd silencing apparatus in the exhaust front pipe of described two outlet pipes, wherein:
Exhaust branch pipe is connected with the exhaust front pipe of described two outlet pipes, thus makes the waste gas produced in engine cylinder-body enter described two outlet pipes;
In described two outlet pipes, waste gas is successively by exhaust front pipe, exhaust expansion bellows and tailpipe, and discharged by the outlet of tailpipe, wherein the first silencing apparatus carries out the first noise elimination process to the exhaust sound in exhaust expansion bellows, second silencing apparatus carries out the second noise elimination process to the exhaust sound in tailpipe, 3rd silencing apparatus carries out the 3rd noise elimination process to the exhaust sound in exhaust front pipe, and the shell of described first silencing apparatus, the second silencing apparatus and the 3rd silencing apparatus is irregularly shaped;
Circulating valve is set in exhaust branch pipe, for the suction tude making the portion circulation produced in engine cylinder-body enter motor;
Also catalyst is set, for reducing exhaust gas pulses in the exhaust front pipe ingress of described two outlet pipes;
First silencing apparatus has resonance lateral tube and the adjustable resonant chamber of cavity volume size, first silencing apparatus has the piston apparatus regulating resonant chamber cavity volume size, gas in resonance lateral tube and the gas in resonant chamber form spring mass system, to produce resonance interference to the exhaust sound in exhaust expansion bellows, thus the first noise elimination process is carried out to the exhaust sound in exhaust expansion bellows, wherein the frequency range of resonance interference is directly proportional to the cavity volume size of resonant chamber and resonance lateral tube length;
In the tailpipe of described two outlet pipes, arrange tailpipe vibration isolator at the suction port of the second silencing apparatus and/or air outlet place, for suppressing exhaust gas pulses, wherein tailpipe vibration isolator has rubber layer for vibration isolation and nylon block;
Described system also has the tailpipe acoustic hood of the tailpipe comprising described two outlet pipes, the noise produced for suppressing motor.
2. system according to claim 1, is characterized in that,
In the outlet port of the tailpipe of described two outlet pipes, tailpipe cushion rubber bumper is also set, for suppressing exhaust gas pulses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210210397.8A CN102720577B (en) | 2012-06-26 | 2012-06-26 | Exhaust system for crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210210397.8A CN102720577B (en) | 2012-06-26 | 2012-06-26 | Exhaust system for crane |
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| Publication Number | Publication Date |
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| CN102720577A CN102720577A (en) | 2012-10-10 |
| CN102720577B true CN102720577B (en) | 2015-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210210397.8A Active CN102720577B (en) | 2012-06-26 | 2012-06-26 | Exhaust system for crane |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107288731A (en) * | 2016-03-30 | 2017-10-24 | 光阳工业股份有限公司 | The exhaust apparatus of motor engine |
| CN105888803A (en) * | 2016-05-30 | 2016-08-24 | 浙江汇豪机械制造有限公司 | Device for exhausting and noise lowering of generator set |
| CN106321208A (en) * | 2016-11-08 | 2017-01-11 | 天津雷沃发动机有限公司 | Diesel engine exhaust pipeline improvement structure for corn harvester |
| CN106552805B (en) * | 2016-12-02 | 2018-10-30 | 四川电力送变电建设公司 | The application method of the centrifugal axial flow blower emission from vehicles device of biexhaust pipe |
| CN110344929A (en) * | 2019-07-18 | 2019-10-18 | 重庆隆鑫通航发动机制造有限公司 | Engine with pressure charging system |
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| US6494290B1 (en) * | 1997-10-01 | 2002-12-17 | Filterwerk Mann & Hummel Gmbh | Noise suppressor with a bypass resonator |
| CN1491316A (en) * | 2001-02-13 | 2004-04-21 | 里卡多英国有限公司 | Reciprocal engine |
| CN1806102A (en) * | 2004-08-20 | 2006-07-19 | 世钟工业株式会社 | Front muffler |
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| CN101363350A (en) * | 2008-09-27 | 2009-02-11 | 威海中复西港船艇有限公司 | Exhaust for internal combustion engine |
| CN202937340U (en) * | 2012-06-26 | 2013-05-15 | 徐州重型机械有限公司 | Exhaust system of crane |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005054002B4 (en) * | 2005-11-10 | 2021-08-12 | Purem GmbH | silencer |
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2012
- 2012-06-26 CN CN201210210397.8A patent/CN102720577B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6494290B1 (en) * | 1997-10-01 | 2002-12-17 | Filterwerk Mann & Hummel Gmbh | Noise suppressor with a bypass resonator |
| CN1491316A (en) * | 2001-02-13 | 2004-04-21 | 里卡多英国有限公司 | Reciprocal engine |
| CN1806102A (en) * | 2004-08-20 | 2006-07-19 | 世钟工业株式会社 | Front muffler |
| CN101195339A (en) * | 2006-12-08 | 2008-06-11 | 奇瑞汽车有限公司 | Exhaustion system for automobile |
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| CN202937340U (en) * | 2012-06-26 | 2013-05-15 | 徐州重型机械有限公司 | Exhaust system of crane |
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| CN102720577A (en) | 2012-10-10 |
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Address after: 221001 Jiangsu city of Xuzhou Province Economic and Technological Development Zone of High Road No. 68 Patentee after: Xuzhou Heavy Machinery Co., Ltd. Address before: 221004 Xuzhou, Zhejiang Province, Jiangsu Road No. 165 Patentee before: Xuzhou Heavy Machinery Co., Ltd. |
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