CN204327250U - A kind of SCR catalytic muffler - Google Patents

A kind of SCR catalytic muffler Download PDF

Info

Publication number
CN204327250U
CN204327250U CN201420694714.2U CN201420694714U CN204327250U CN 204327250 U CN204327250 U CN 204327250U CN 201420694714 U CN201420694714 U CN 201420694714U CN 204327250 U CN204327250 U CN 204327250U
Authority
CN
China
Prior art keywords
cavity
dividing plate
carrier
partition
pressure stabilizing
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.)
Expired - Lifetime
Application number
CN201420694714.2U
Other languages
Chinese (zh)
Inventor
朱美颖
桂建华
田新伟
张晓�
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Weichai Power Co Ltd
Original Assignee
Weichai Power Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Weichai Power Co Ltd filed Critical Weichai Power Co Ltd
Priority to CN201420694714.2U priority Critical patent/CN204327250U/en
Application granted granted Critical
Publication of CN204327250U publication Critical patent/CN204327250U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Exhaust Silencers (AREA)

Abstract

The utility model discloses a kind of SCR catalytic muffler, comprise housing, housing is provided with the head plate of suction tude and the tailgate with outlet pipe, the first dividing plate and second partition is provided with in housing, pressure stabilizing cavity is provided with, the first dividing plate in pressure stabilizing cavity and be provided with several carriers be set up in parallel between second partition between first dividing plate and second partition; Be provided with buffer cavity between head plate and the first dividing plate, be provided with exhaust cavity between tailgate and second partition, the two ends of carrier extend in buffer cavity and exhaust cavity respectively; First dividing plate is provided with the first through hole being communicated with pressure stabilizing cavity and buffer cavity, and suction tude extends in pressure stabilizing cavity.When ensureing that carrier total volume is constant and meet waste gas emission standard, the length of effective shortening carrier, while guarantee enough times of contact and reduction reaction time, high velocity air through repeatedly roundabout, continuous reflection, smooth out with the fingers genial absorption, flow velocity declines, the waste gas aerodynamic noise of being discharged by outlet pipe is declined, and reaches good noise reduction.

Description

A kind of SCR catalytic muffler
Technical field
The utility model relates to silencing apparatus technical field, particularly relates to a kind of SCR catalytic muffler.
Background technique
State compulsion carries out state IV emission standard, and post-processing technology is faced with severe tests.At present, the limit value of state IV emission regulation demands nitrogen oxide (NOx) is 3.5g/ (kWh), and the limit value of particulate matter (PM) is 0.03g/ (kWh).And the analytical data of relevant departments is bright, diesel-oil vehicle is the main source of nitrogen oxide (NOx) and particulate matter (PM) these two kinds of pollutants.On existing diesel-oil vehicle, usually adopt device after-treatment system, reduce this pollutant discharge; On the other hand, raising travelling comfort required along with Consumer, noise problem also gradually pay close attention to by everybody.And on diesel-oil vehicle, except engine body noise, the contribution amount of aerodynamic noise in car load noise of vent systems is also very large.The technological means of now conventional reduction exhaust sound is device exhaust silencer in vent systems.
As everyone knows, on the truck of lift-launch diesel engine, the layout of each component closely, will be loaded after-treatment system and exhaust silencer simultaneously, need very large space, be usually difficult to the installation that enough spaces meet free-standing reprocessing and silencing apparatus.Therefore, the SCR catalytic muffler being integrated with after-treatment system and exhaust silencer function arises at the historic moment, and can meet the requirement of discharge and noise simultaneously.Further, due to the restriction of length on truck, usually box SCR catalytic muffler is adopted.Be mostly tandem carrier structure at present, carrier approximately occupies 40% of SCR catalytic muffler overall length in the longitudinal direction, and Carrier diameters also occupies the area in cross section about 1/3.And in the design of silencing apparatus, the soundproof effect of mazy type pipeline is better, but box integrated length direction is very short, limits the design of this pipeline.Therefore, for integrated form SCR catalytic muffler, reprocessing carrier volume used can ensure, but the area of noise elimination cavity is relatively very little, causes the target of discharging to realize, is but difficult to the requirement simultaneously taking into account noise.
In the design and checking of SCR catalytic muffler, discharge, crystallization, engine performance and noise are separate, and any one does not reach target all can not become setting scheme.And current mentality of designing, often give priority to emission problem, existing space but can only be utilized to arrange for noise and be difficult to noise elimination cavity meet corresponding noise requirements.The SCR catalytic muffler of coupling state IV utilizes packaged tandem carrier, when the later stage carries out noise optimization, carrier part almost can not be changed, and this tandem carrier occupies the most of space in SCR catalytic muffler, this just makes silencing cavity that very little space can only be utilized to arrange, its optimization is very restricted, and increases technical difficulty, is difficult to carry out.
Model utility content
The purpose of this utility model is to provide a kind of SCR catalytic muffler, under limited installing space, meets the effect that toxic emission meets standard and reduces aerodynamic noise simultaneously.
For solving the problems of the technologies described above, the technical solution of the utility model is: a kind of SCR catalytic muffler, comprise housing, the two ends of described housing are respectively equipped with a plate and tailgate, described head plate is provided with the suction tude extended in described housing, described tailgate is provided with outlet pipe, the first dividing plate and second partition is provided with in described housing, pressure stabilizing cavity is provided with between described first dividing plate and described second partition, be provided with several carriers be set up in parallel between described first dividing plate in described pressure stabilizing cavity and described second partition, each described carrier is equipped with air-inlet cavity;
Be provided with buffer cavity between described head plate and described first dividing plate, be provided with exhaust cavity between described tailgate and described second partition, the two ends of described carrier extend in described buffer cavity and described exhaust cavity respectively;
Described first dividing plate is provided with the first through hole of the described pressure stabilizing cavity of some connections and described buffer cavity, and described suction tude extends in described pressure stabilizing cavity.
Improve as one, the described suction tude circumference being positioned at described pressure stabilizing cavity is provided with some second through holes.
As further improvement, described carrier is two that are set up in parallel, and carrier described in two lays respectively on two corners of described housing subtend setting, and described in described suction tude and two, carrier is triangularly arranged.
As further improving, described tailgate is provided with sound absorbing material.
Owing to have employed technique scheme, the beneficial effects of the utility model are:
Owing to being provided with several carriers be set up in parallel between the first dividing plate and second partition, thus at limited installing space with when ensureing that carrier total volume is constant, the length of effective shortening carrier, while guarantee enough times of contact and reduction reaction time, for the layout of noise elimination cavity and pipeline reserves more space, and then waste gas fully mixes at air inlet pressure stabilizing cavity with adding together with blue solution of spraying into, the first through hole on the first dividing plate enters in buffer cavity, back blast head plate loss portion of energy, carrier generation reduction reaction is flowed through after reflection, air-flow smoothed out with the fingers in carrier along after, flow velocity declines, finally flow into exhaust cavity through air-inlet cavity, air-flow passes through expansion in exhaust cavity, energy dissipation, smooth out with the fingers along after gas shock tailgate and the sound absorbing material of inside, part acoustic energy is absorbed, medium-high frequency section noise is decayed at this, finally discharge through outlet pipe.In this process, high velocity air through repeatedly roundabout, continuous reflection, smooth out with the fingers genial absorption, flow velocity decline, the waste gas aerodynamic noise of being discharged by outlet pipe is declined greatly, reaches good noise reduction; Meanwhile, the surge pressure of the waste gas after current stabilization to shell wall side and internal structure diminishes, and the noise that SCR catalytic muffler causes structural vibration to give off due to waste gas also can reduce; On the other hand, compared with tradition, in original constancy of volume with under ensureing the standard compliant situation of toxic emission, do not need to carry out complicated layout and can reach desirable aerodynamic noise attenuating, the exhaust back pressure of toxic emission can be well controlled, the balanced contradiction of acoustic attenuation performance and exhaust back pressure.
Because suction tude circumference is provided with some second through holes, thus by the second through hole, pressure stabilization function is played to waste gas, for follow-up work is laid a good foundation.
Because two carriers lay respectively on two corners of housing subtend setting, connection and reasonable arrangement, space is fully used, and adopts this structure also suitably can expand the volume of carrier simultaneously.
Because tailgate is provided with sound absorbing material, thus further increase soundproof effect.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 is the structural representation of A-A in Fig. 1;
Fig. 3 is the explosive view of Fig. 1;
In figure, 1-housing; 2-suction tude; 3-outlet pipe; 4-head plate; 5-first dividing plate; 6-air-inlet cavity; 7-pressure stabilizing cavity; 8-carrier; 9-second partition; 10-through hole; 11-exhaust cavity; 12-buffer cavity; 13-tailgate; 14-sound absorbing material; 15-through hole.
Embodiment
In order to make the purpose of this utility model, technological scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
As Fig. 1 to Fig. 3 jointly shown in, a kind of SCR catalytic muffler comprises housing 1, the two ends of this housing 1 are respectively equipped with a plate 4 and tailgate 13, this plate 4 is provided with the suction tude 2 extended in housing 1, this tailgate 13 is provided with outlet pipe 3, the first dividing plate 5 and second partition 9 is provided with in this housing 1, pressure stabilizing cavity 7 is provided with between this first dividing plate 5 and second partition 9, the first dividing plate 5 in pressure stabilizing cavity 7 and be provided with several carriers 8 be set up in parallel between second partition 9, each carrier 8 is equipped with air-inlet cavity 6; Be provided with buffer cavity 12 between this plate 4 and first dividing plate 5, be provided with exhaust cavity 11 between this tailgate 13 and second partition 9, the two ends of this carrier 8 extend in buffer cavity 12 and exhaust cavity 11 respectively.
This first dividing plate 5 is provided with the first through hole of some connection pressure stabilizing cavities 7 and buffer cavity 12, this first logical sky is through hole 15, this suction tude 2 extends in pressure stabilizing cavity 7, and suction tude 2 circumference being positioned at pressure stabilizing cavity 7 is provided with some second through holes, and this second through hole is through hole 10.
In the design, this carrier 8 is two of being set up in parallel, and two carriers 8 lay respectively on two corners that housing 1 subtend arranges, and this suction tude 2 and two carriers 8 are triangularly arranged.
The side this tailgate 13 being positioned at housing 1 is provided with sound absorbing material 14, and this sound absorbing material 14 is the material that can realize sound absorption function as the technician of ability.
In actual applications, owing to being provided with several carriers 8 be set up in parallel between the first dividing plate 5 and second partition 9, thus at limited installing space with when ensureing that carrier 8 total volume is constant, the length of effective shortening carrier 8, while guarantee enough times of contact and reduction reaction time, for the layout of noise elimination cavity and pipeline reserves more space, and then waste gas fully mixes at air inlet pressure stabilizing cavity 7 with adding together with blue solution of spraying into, through hole 15 on the first dividing plate 5 enters in buffer cavity 12, back blast head plate 4 loss portion of energy, after reflection, flow through carrier 8 reduction reaction occurs, air-flow smoothed out with the fingers in carrier 8 along after, flow velocity declines, finally flow into exhaust cavity 11 through air-inlet cavity 6, air-flow passes through expansion in exhaust cavity 11, energy dissipation, smooth out with the fingers along after gas shock tailgate and the sound absorbing material of inside, part acoustic energy is absorbed, medium-high frequency section noise is decayed at this, finally discharge through outlet pipe.In this process, high velocity air through repeatedly roundabout, continuous reflection, smooth out with the fingers genial absorption, flow velocity decline, the waste gas aerodynamic noise of being discharged by outlet pipe 3 is declined greatly, reaches good noise reduction; Meanwhile, the surge pressure of the waste gas after current stabilization to housing 1 wall and internal structure diminishes, and the noise that SCR catalytic muffler causes structural vibration to give off due to waste gas also can reduce; On the other hand, compared with tradition, in original constancy of volume with under ensureing the standard compliant situation of toxic emission, do not need to carry out complicated layout and can reach desirable aerodynamic noise attenuating, the exhaust back pressure of toxic emission can be well controlled, the balanced contradiction of acoustic attenuation performance and exhaust back pressure.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.

Claims (4)

1. a SCR catalytic muffler, comprise housing (1), the two ends of described housing (1) are respectively equipped with a plate (4) and tailgate (13), described head plate (4) is provided with the suction tude (2) extended in described housing (1), described tailgate (13) is provided with outlet pipe (3), it is characterized in that, the first dividing plate (5) and second partition (9) is provided with in described housing (1), pressure stabilizing cavity (7) is provided with between described first dividing plate (5) and described second partition (9), be positioned at several carriers (8) being provided with between described first dividing plate (5) of described pressure stabilizing cavity (7) and described second partition (9) and being set up in parallel, each described carrier (8) is equipped with air-inlet cavity (6),
Buffer cavity (12) is provided with between described head plate (4) and described first dividing plate (5), be provided with exhaust cavity (11) between described tailgate (13) and described second partition (9), the two ends of described carrier (8) extend in described buffer cavity (12) and described exhaust cavity (11) respectively;
Described first dividing plate (5) is provided with the first through hole of the described pressure stabilizing cavity of some connections (7) and described buffer cavity (12), and described suction tude (2) extends in described pressure stabilizing cavity (7).
2. a kind of SCR catalytic muffler according to claim 1, is characterized in that, described suction tude (2) circumference being positioned at described pressure stabilizing cavity (7) is provided with some second through holes.
3. a kind of SCR catalytic muffler according to claim 1 and 2, it is characterized in that, described carrier (8) is two of being set up in parallel, carrier described in two (8) lays respectively on two corners of described housing (1) subtend setting, and described in described suction tude (2) and two, carrier (8) is triangularly arranged.
4. a kind of SCR catalytic muffler according to claim 3, is characterized in that, described tailgate (13) is provided with sound absorbing material (14).
CN201420694714.2U 2014-11-18 2014-11-18 A kind of SCR catalytic muffler Expired - Lifetime CN204327250U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420694714.2U CN204327250U (en) 2014-11-18 2014-11-18 A kind of SCR catalytic muffler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420694714.2U CN204327250U (en) 2014-11-18 2014-11-18 A kind of SCR catalytic muffler

Publications (1)

Publication Number Publication Date
CN204327250U true CN204327250U (en) 2015-05-13

Family

ID=53163621

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420694714.2U Expired - Lifetime CN204327250U (en) 2014-11-18 2014-11-18 A kind of SCR catalytic muffler

Country Status (1)

Country Link
CN (1) CN204327250U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108019258A (en) * 2016-11-04 2018-05-11 天纳克(苏州)排放系统有限公司 Box-type tail-gas after treatment apparatus
CN110685781A (en) * 2019-11-14 2020-01-14 清华大学苏州汽车研究院(吴江) Tail gas treatment device
WO2020029008A1 (en) * 2018-08-06 2020-02-13 臧志成 Separator plate forming method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108019258A (en) * 2016-11-04 2018-05-11 天纳克(苏州)排放系统有限公司 Box-type tail-gas after treatment apparatus
WO2020029008A1 (en) * 2018-08-06 2020-02-13 臧志成 Separator plate forming method
CN110685781A (en) * 2019-11-14 2020-01-14 清华大学苏州汽车研究院(吴江) Tail gas treatment device
CN110685781B (en) * 2019-11-14 2024-05-14 清华大学 Tail gas treatment device

Similar Documents

Publication Publication Date Title
CN204327250U (en) A kind of SCR catalytic muffler
CN205013165U (en) Engine and silencer thereof
CN203035307U (en) Integrated selective catalytic reduction (SCR) catalytic conversion muffler for diesel engine
CN202732058U (en) Automobile muffler
Srinivas et al. Design and Analysis of an Automobile Exhaust Muffler
CN206190370U (en) Integrated form diesel vehicle catalytic muffler assembly
CN205370687U (en) SCR silencer assembly
CN202431338U (en) Catalytic conversion muffler of diesel engine
KR101222785B1 (en) exhaust reduction device of turbo engine
CN106285874A (en) A kind of compound muffler for vehicle
CN204703984U (en) Impedance composite muffler
CN202768127U (en) Automobile silencer
CN202181974U (en) Impedance composite type admission air silencer for diesel fork lift truck
CN213510796U (en) Silencer structure with aftertreatment
CN202596840U (en) Automobile muffler
CN203403930U (en) Catalyst of automobile exhaust system
CN203822425U (en) Semiconductor control rectifier (SCR) catalytic muffler
CN201599085U (en) Integral muffler device for mini trucks
CN203594488U (en) Universal type resistant silencer
CN102465731B (en) The tail-gas purifying silencer of internal combustion engine
CN201835898U (en) Tail gas purifying silencer of internal combustion engine
CN104612798A (en) Muffler air inlet pipe
CN206092122U (en) Novel silencer is used to agricultural vehicle
CN213743629U (en) Automobile exhaust muffler
CN212022316U (en) Truck exhaust system arrangement structure and truck

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant