CN116480439A - Integrated exhaust purification muffler - Google Patents
Integrated exhaust purification muffler Download PDFInfo
- Publication number
- CN116480439A CN116480439A CN202310715507.4A CN202310715507A CN116480439A CN 116480439 A CN116480439 A CN 116480439A CN 202310715507 A CN202310715507 A CN 202310715507A CN 116480439 A CN116480439 A CN 116480439A
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- Prior art keywords
- muffler
- resonance tube
- section
- cavity
- exhaust
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- 238000000746 purification Methods 0.000 title abstract description 11
- 230000003197 catalytic effect Effects 0.000 claims abstract description 63
- 230000030279 gene silencing Effects 0.000 claims abstract description 17
- 239000007921 spray Substances 0.000 claims abstract description 15
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 13
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 12
- 231100000719 pollutant Toxicity 0.000 claims abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- 238000005192 partition Methods 0.000 claims description 43
- 230000003584 silencer Effects 0.000 claims description 19
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 12
- 238000005452 bending Methods 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 239000000969 carrier Substances 0.000 claims description 3
- 239000003054 catalyst Substances 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 229910000510 noble metal Inorganic materials 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 11
- 230000008030 elimination Effects 0.000 abstract description 2
- 238000003379 elimination reaction Methods 0.000 abstract description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 21
- 239000004202 carbamide Substances 0.000 description 21
- 239000007789 gas Substances 0.000 description 14
- 239000000203 mixture Substances 0.000 description 12
- 230000008859 change Effects 0.000 description 4
- 230000007480 spreading Effects 0.000 description 4
- 238000003892 spreading Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- 230000002708 enhancing effect Effects 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 241000239290 Araneae Species 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 230000001743 silencing effect Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000003421 catalytic decomposition reaction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
-
- 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
- F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
- F01N1/089—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling using two or more expansion chambers in series
-
- 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
- F01N1/16—Silencing apparatus characterised by method of silencing by using movable parts
- F01N1/161—Silencing apparatus characterised by method of silencing by using movable parts for adjusting resonance or dead chambers or passages to resonance or dead chambers
- F01N1/163—Silencing apparatus characterised by method of silencing by using movable parts for adjusting resonance or dead chambers or passages to resonance or dead chambers by means of valves
-
- 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
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
- F01N3/2885—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices with exhaust silencers in a single housing
-
- 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
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2892—Exhaust flow directors or the like, e.g. upstream of catalytic device
-
- 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Silencers (AREA)
Abstract
The invention discloses an integrated exhaust purification muffler, which comprises a muffler shell, wherein one side of the muffler shell is provided with an air inlet pipe, and the air inlet pipe is used for being connected with an exhaust pipe of an engine; the mixing structure is arranged on one side of the inner cavity of the muffler shell, which is close to the air inlet pipe, and comprises an air flow disturbance structure and a modulation structure, wherein the air flow disturbance structure is used for disturbing air flow sprayed into the inner cavity of the muffler shell; the modulation structure is used for fully mixing the reducing agent spray and the air flow; the exhaust structure is arranged at one side of the inner cavity of the muffler shell, which is far away from the air inlet pipe, and a resonant cavity is formed on the exhaust structure and is used for reducing exhaust noise through resonance; the catalytic converter is arranged between the mixing structure and the silencing structure and is used for carrying out catalytic conversion on pollutants in the fully mixed airflow. The integrated exhaust purification muffler provided by the invention has the effects of reducing flow resistance and reducing middle-low frequency exhaust noise, and has a good noise elimination effect on low-frequency order noise of an engine.
Description
Technical Field
The invention relates to the technical field of commercial vehicle exhaust, in particular to an integrated exhaust purification muffler.
Background
The exhaust system of the existing diesel engine is developed towards an integrated direction, namely, an exhaust gas purifying treatment system and an exhaust muffler structure are integrated together, so that the requirements of light weight and space arrangement are met. However, the existing integrated exhaust purification muffler is lack of a mature design scheme, the designed scheme is not uniform enough for mixing spraying of an injected reducing agent (urea), aerodynamic resistance is large, catalytic reduction efficiency is low, pollutant emission is high, and back pressure loss of an engine is increased. In addition, due to the integrated design, the exhaust muffler has limited size space, so that the muffler has poor middle and low frequency silencing performance, and particularly, the order noise of the engine is reduced, and the exhaust sound quality of the whole vehicle is seriously influenced.
Disclosure of Invention
The invention aims to provide an integrated exhaust purification muffler which solves the problems of uneven mixing of air flow and catalytic reduction substances, high exhaust back pressure, insufficient treatment of middle and low frequency noise and the like of an automobile muffler. The muffler has reasonable structural design and simple process, and can effectively reduce exhaust back pressure, promote the mixing of urea and air flow and control low-frequency order noise of exhaust.
The technical scheme adopted for solving the technical problems is as follows: provided is an integrated exhaust gas purifying muffler including:
the muffler comprises a muffler shell, wherein an air inlet pipe is arranged at one side of the muffler shell and is used for being connected with an exhaust pipe of an engine;
the mixing structure is arranged on one side, close to the air inlet pipe, of the inner cavity of the silencer shell and comprises an airflow disturbance structure and a modulation structure, and the airflow disturbance structure is used for disturbing airflow sprayed into the inner cavity of the silencer shell; the modulation structure is used for fully mixing the reducing agent spray and the air flow;
the exhaust structure is arranged at one side of the inner cavity of the muffler shell, which is far away from the air inlet pipe, and a resonant cavity is formed on the exhaust structure and used for reducing exhaust noise through resonance;
and the catalytic converter is arranged between the mixing structure and the silencing structure and is used for carrying out catalytic conversion on pollutants in the fully mixed airflow.
According to the technical scheme, the airflow disturbance structure is used for disturbing the airflow sprayed into the cavity of the silencer shell from the air inlet pipe, changing the airflow direction, being beneficial to more mixing of the airflow and the reducing agent spray, and the modulating structure is used for modulating the reducing agent spray and the airflow mixture, so that the reducing agent spray and the airflow mixture uniformly enter the catalytic converter, the catalytic efficiency is improved, the airflow mixture passes through the catalytic converter more smoothly, the resistance of airflow passing is reduced, and the exhaust back pressure is reduced; and the exhaust structure is provided with a resonant cavity, the resonant cavity can effectively control low-frequency noise, and the exhaust noise quality of the whole vehicle is improved.
According to the further scheme, a front end cover is arranged at one end, far away from the exhaust structure, of the silencer shell, the air inlet pipe is arranged on the front end cover, a reducing agent nozzle is welded on the front end cover, and an included angle between the reducing agent nozzle and the air outlet direction of the air inlet pipe is 10-20 degrees. It can be appreciated that the arrangement is such that the air flow disturbance structure is matched to cause disturbance to the air flow in the cavity of the muffler shell, so that the air flow and the reducing agent spray are more mixed, and the mixture is convenient to uniformly enter the modulation structure.
The further scheme is that the airflow disturbance structure comprises an eccentric cone structure arranged in the inner cavity of the silencer shell, the eccentric cone structure comprises an eccentric cone, the eccentric cone is arranged in a first circular ring, the first circular ring is fixed on the inner wall of the silencer shell in a welding mode, and the tip end of the eccentric cone is opposite to the air outlet of the air inlet pipe. It will be appreciated that the tip of the eccentric cone is directly opposite the outlet of the inlet duct, facilitating the disturbance of the airflow injected into the cavity from the inlet duct to change the direction of the airflow.
Further, the modulation structure comprises a multi-ring-shaped spreading corrugated rod structure, the multi-ring-shaped spreading corrugated rod structure comprises a plurality of ring-shaped spreading corrugated rods with different radiuses, the ring-shaped spreading corrugated rods are fixed on a second ring, and the second ring is fixed on the inner wall of the silencer shell.
According to the technical scheme, the multi-ring-shaped spanwise corrugated rod structure is used for layering concentric rings to homogenize large space turbulence caused by the eccentric conical structure. When the airflow bypasses the annular spanwise corrugated rod, tiny longitudinal and transverse turbulence can be generated, so that the reducing agent spray and the airflow are better mixed at a microscopic level, and the multi-annular spanwise corrugated rod structure has low flow resistance and cannot bring larger exhaust back pressure loss.
The further scheme is that the number of the multi-ring-shaped expanding corrugated rod structures is two, the inner cavities of the silencer shell are arranged at intervals, and projections of the ring-shaped expanding corrugated rods on the two multi-ring-shaped expanding corrugated rod structures on each other are arranged in a staggered mode.
According to the technical scheme, through the arrangement of the two multi-ring-shaped spanwise corrugated rod structures, the second multi-ring-shaped spanwise corrugated rod structure can modulate the air flow passing through the gaps of the first multi-ring-shaped spanwise corrugated rod structure, so that after passing through the two multi-ring-shaped spanwise corrugated rod structures, the air flow is well homogenized, and after flowing into the catalytic converter, the catalytic conversion efficiency can be improved.
The catalytic converter comprises a first catalytic converter and a second catalytic converter, wherein porous ceramic carriers and noble metal catalysts are arranged on the first catalytic converter and the second catalytic converter, a certain distance is reserved between the first catalytic converter and the second catalytic converter, and a second expansion cavity is formed between the second catalytic converter and a muffler shell.
The further scheme is that detection sensors are arranged on two sides of the catalytic converter and are used for detecting the oxygen content and the nitrogen oxide content in the airflow.
The exhaust structure comprises a first baffle plate, a second baffle plate, a resonance tube, an air outlet tube and a rear end cover, wherein the first baffle plate, the second baffle plate, the resonance tube and the air outlet tube are arranged in the inner cavity of the muffler shell, and the rear end cover is arranged at the tail end of the muffler shell;
the catalytic converter, the first partition plate and the muffler shell form a third expansion cavity; the first partition plate, the second partition plate and the muffler shell form a fourth expansion cavity, and the second partition plate, the rear end cover and the muffler shell form a resonant cavity;
the resonance tube comprises a resonance tube perforation section and a resonance tube bending section, the resonance tube perforation section is arranged on the first partition plate and the second partition plate, an air inlet of the resonance tube perforation section is arranged in the third expansion cavity, a plurality of first tube holes are formed in the side wall of the resonance tube perforation section in the fourth expansion cavity at intervals, the resonance tube bending section is arranged in the resonance cavity, and an air outlet hole of the resonance tube bending section is opposite to a valve structure on the second partition plate;
when the airflow velocity in the resonance tube elbow section is larger than a preset flow velocity value, the valve structure is opened; when the airflow velocity in the resonance tube elbow section is smaller than a preset flow velocity value, the valve structure is closed;
the air outlet pipe comprises an air outlet pipe perforation section and a bending pipe section, and the air inlet end of the air outlet pipe perforation section penetrates through the second partition plate and extends into the fourth expansion cavity; the air outlet end of the air outlet pipe perforation section penetrates through the rear end cover and extends to the outside of the muffler shell to be connected with the bent pipe section.
According to the technical scheme, when the flow speed of the air flow is smaller, the air flow flows into the fourth expansion cavity through the first pipe hole on the perforated section of the resonance pipe, then is discharged into the atmosphere through the air outlet pipe, at the moment, the valve structure on the second partition plate is closed, and the cavity between the second partition plate and the rear end cover is not communicated with the air flow, so that the second partition plate and the rear end cover form a resonance cavity to play a role in resonance, and low-frequency noise can be effectively controlled; when the airflow speed is large, the corresponding engine speed is large, low-frequency order sound can move towards medium and high frequency at the moment, because the first pipe hole on the perforated section of the resonance pipe is small, the resistance passing through the resonance pipe is large when the airflow passes through the resonance pipe, and the airflow can rush out the valve structure at the moment to change the resonance cavity into an expansion cavity, so that the airflow enters into the fourth expansion cavity through the resonance cavity instead of entering into the fourth expansion cavity through the first pipe hole, the airflow can pass through quickly, the exhaust pressure loss is reduced, the exhaust structure plays a role in reducing low-frequency noise when the airflow is small, and plays a role in reducing the flow resistance when the airflow is large.
Further scheme is, the valve structure includes circular lid and torsional spring, circular lid rotates to be connected in the one side that the rear end cover was kept away from to the second baffle, the cover is equipped with the torsional spring on the rotation axis of circular lid.
According to the technical scheme, when the airflow velocity is small, the airflow is insufficient to overcome the torsion force of the torsion spring, so that the valve structure cannot be opened, and when the airflow velocity is large, the valve structure cannot be opened; the torsion of torsional spring can be overcome to the air current, conveniently opens the valve structure to make the valve structure realize automatic start and stop according to the velocity of flow of air current, convenient operation, simple structure again.
The further scheme is that one end of the resonance tube elbow section far away from the resonance tube perforation section is propped against the valve structure, the tail end of the resonance tube elbow section is provided with a resonance tube full perforation section, a plurality of rings of third tube holes are formed in the resonance tube full perforation section, a cascade micro perforation resonant cavity is arranged on the outer side of the resonance tube perforation section, a third partition plate is arranged in the cascade micro perforation resonant cavity, the cascade micro perforation resonant cavity is divided into a plurality of chambers with different sizes by the third partition plate, a plurality of rings of micro perforations are formed in the side wall of the resonance tube perforation section, and the size of each micro perforation corresponds to the size of each chamber.
According to the technical scheme, the resonant pipe full-perforation pipe section is additionally arranged at the tail end of the resonant pipe, and the tail end of the resonant pipe full-perforation pipe section is propped against the valve structure; when the airflow velocity is smaller, the airflow velocity is insufficient to open the valve structure, and at the moment, a third pipe hole on the full-perforation pipe section of the resonance pipe is used for transmitting sound, so that the resonance pipe plays a role of resonance silencing; when the airflow velocity is larger, the resonant pipe full-perforation pipe section can guide the airflow to impact the valve structure, and as the tail end of the resonant pipe full-perforation pipe section props against the valve structure, the airflow can be prevented from being dispersed, the aim of reducing airflow resistance is fulfilled, and therefore the exhaust back pressure of the muffler is further reduced. In addition, a cascade micro-perforation resonant cavity is added to the resonant tube perforation section, the cascade micro-perforation resonant cavity is divided into a plurality of chambers with different sizes by a third partition board, and a circle of micro-perforations are formed in the tube wall of the resonant tube corresponding to each chamber; the size of the cavity and the aperture and the number of the microperforations can be adjusted to adjust the resonance silencing frequency band and the bandwidth of the cascade microperforation resonant cavity. When the airflow velocity is smaller, the cascade microperforated resonant cavity is mutually coupled with the resonant pipe, so that the function of enhancing the low-frequency silencing capability of the whole silencer is achieved, and the low-frequency silencing frequency band and bandwidth can be effectively adjusted.
Compared with the prior art, the invention has the following beneficial effects:
(1) When the air flow is small, the cavity between the second baffle plate and the rear end cover is not communicated with the air flow to form a resonant cavity, so that the effect of reducing low-frequency noise is achieved, and when the air flow is large, the valve mechanism is automatically opened, the cavity between the second cover plate and the rear end cover is communicated with the air flow to form an expansion cavity, so that the effect of reducing the flow resistance and the effect of reducing middle-low-frequency exhaust noise is achieved, and the muffler has a good noise elimination effect on the noise of the low-frequency order of the engine;
(2) The integrated exhaust purification silencer can enable urea spray to be mixed with air flow efficiently, and exhaust pollutants to be subjected to efficient catalytic conversion, so that the exhaust emission requirement is met;
(3) The integrated exhaust purification muffler can effectively reduce the exhaust back pressure, thereby improving the power of an engine;
(4) When the flow speed of the air flow is high, the air flow opens the valve structure under the guiding action of the full perforated pipe section of the resonance pipe, so that the air flow can be prevented from being dispersed in the resonance cavity, the aim of reducing air flow resistance is fulfilled, and the exhaust back pressure of the muffler is further reduced; when the airflow velocity is smaller, the engine speed is low, the low-frequency order infrasound frequency is low at the moment, the requirement on the low-frequency silencing capability is high, the cascade microperforated resonant cavity is mutually coupled with the resonance tube, the effect of enhancing the low-frequency silencing capability of the whole silencer is further achieved, and the low-frequency silencing frequency band and the bandwidth can be effectively adjusted;
(5) The integrated exhaust purification muffler has the advantages of compact structure, small occupied space, low cost and simple manufacturing process, and is suitable for the requirement of batch production.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view showing an internal structure of an integrated exhaust purifying muffler according to an embodiment of the present invention;
FIG. 2 is a schematic view of a multi-ring spanwise corrugated rod structure of an integrated exhaust muffler according to an embodiment of the present invention;
FIG. 3 is a schematic view of a resonance tube of an integrated exhaust purifying muffler according to an embodiment of the present invention;
FIG. 4 is a schematic view of an eccentric cone structure of an integrated exhaust purifying muffler according to an embodiment of the present invention;
FIG. 5 is a schematic view of the structure of an outlet pipe of an integrated exhaust purifying muffler according to an embodiment of the present invention;
fig. 6 is a schematic structural view of a valve structure on a second partition of the integrated exhaust purifying muffler according to the embodiment of the present invention.
Reference numerals: 1, a flange; 2, an air inlet pipe; 3 urea nozzle; 4, a front end cover; 5 a first expansion lumen; 6 eccentric conical structure; 7 a multi-ring-shaped spanwise corrugated rod structure; 8, a sensor mounting seat; a 9-stage catalytic converter; a second expansion lumen 10; a two-stage catalytic converter; a third expansion lumen; 13 a first separator; 14 a fourth expansion lumen; 15 a second separator; a 16 resonant cavity; 17 rear end caps; 18 an air outlet pipe; 19 resonance tube; 20 valve structure; 601 eccentric cone; 602 a first cross structure; 603 a first ring; 701 annular spanwise corrugated rod; 702 a second frame structure; 703 a second ring; 1801 perforated section of air outlet pipe; 1802 resistive pack; 1803 bending a tube segment; 1804 a second tube aperture; 1901 resonating tube perforated section; 1902 resonance tube bend sections; 1903 a first tube aperture; 1904 resonating tube fully perforated tube sections; 1905 cascading microperforated resonant cavities; 1906 a third separator; 1907 microperforations; 1908 third tube aperture; 2001 circular cap; 2002 torsion spring.
Detailed Description
In order that the objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 to 6, the present invention provides an integrated exhaust purifying muffler, comprising:
the front end cover 4 and the rear end cover 17 are respectively arranged at two ends of the muffler shell, and the muffler shell, the front end cover 4 and the rear end cover 17 form the outer boundary of the muffler to determine the size space of the muffler. The front end cover 4 is provided with an air inlet pipe 2, one end, far away from the front end cover 4, of the air inlet pipe 2 is provided with a flange 1, and the air inlet pipe 2 is connected with an exhaust pipe of the engine through the flange 1, so that exhaust gas of the engine enters the muffler shell through the air inlet pipe 2; in the muffler shell, along the flow direction of the air flow, a mixing structure, a catalytic converter and an exhaust structure are sequentially arranged, wherein the mixing structure comprises an air flow disturbance structure and a modulation structure.
Referring to fig. 1 and 4, a urea nozzle 3 is further installed on the front end cover 4, the urea nozzle 3 is used for spraying urea to the inner cavity of the muffler shell, and the urea nozzle 3 forms an included angle with the air outlet direction of the air inlet pipe 2, in this embodiment, the included angle between the urea nozzle 3 and the air inlet pipe 2 forms 15 °.
In order to cause disturbance to the air flow sprayed into the inner cavity of the muffler shell, an air flow disturbance structure is arranged on one side of the inner cavity of the muffler shell, which is close to the air inlet pipe 2. In the present embodiment, the air flow disturbing structure is provided as an eccentric conical structure 6. The eccentric cone structure 6 comprises an eccentric cone 601, a first cross structure 602 and a first circular ring 603, the front end cover 4 and the muffler shell form a first expansion cavity 5, the first circular ring 603 is fixedly welded on the inner wall of the muffler shell, the eccentric cone 601 is arranged on the first circular ring 603 through the first cross structure 602, and the eccentric cone 601 is opposite to an air outlet pipe of the air inlet pipe 2. It will be appreciated that the arrangement is such that the tip of the eccentric cone 601 is directly opposite to the air outlet of the air inlet pipe 2, so that the air flow sprayed into the first expansion cavity 5 from the air inlet pipe 2 is conveniently disturbed, the direction of the air flow is changed, the air flow and urea spray are more conveniently mixed, and the mixture is conveniently and uniformly introduced into the modulation structure.
Referring to fig. 1 and 2, the modulation structure includes a multi-ring-shaped spanwise corrugated rod structure 7, the multi-ring-shaped spanwise corrugated rod structure 7 includes a plurality of ring-shaped spanwise corrugated rods 701 with different radii, a second spider structure 702 and a second ring 703, the second ring 703 is also welded on the inner wall of the muffler shell, and the ring-shaped spanwise corrugated rods 701 with different radii are mounted on the second ring 703 through the spider structure 702. It will be appreciated that the multi-annular spanwise corrugated rod structure 7 provides concentric ring stratification of large spatial turbulence caused by the eccentric conical structure 6 to homogenize it. When the airflow bypasses the annular spanwise corrugated rod 701, tiny longitudinal and transverse turbulence is generated, so that urea spray and the airflow are better mixed at a microscopic level, and the urea and airflow mixture uniformly enters the catalytic converter, and the catalytic efficiency is improved; in addition, the multi-annular spanwise corrugated rod structure 7 itself has low flow resistance properties, making the mixture passing therethrough smoother, reducing the resistance to airflow passage, and reducing exhaust back pressure.
Further, the number of the multi-ring-shaped spanwise corrugated rod structures 7 is two, the two multi-ring-shaped spanwise corrugated rod structures 7 are arranged at intervals along the airflow flowing direction in the inner cavity of the muffler shell, and projections of the ring-shaped spanwise corrugated rods 701 on the two multi-ring-shaped spanwise corrugated rod structures 7 are staggered with each other, namely: the projection of the annular spanwise corrugated rod 701 on one of the multi-annular spanwise corrugated rod structures 7 onto the other multi-annular spanwise corrugated rod structure 7 coincides with the gap between the annular spanwise corrugated rods 701 on the other multi-annular spanwise corrugated rod structure 7. After passing through the two-stage multi-ring-shaped spanwise corrugated rod structure 7, the airflow is well homogenized and then flows into the catalytic converter, so that the catalytic conversion efficiency can be improved.
With continued reference to fig. 1, the catalytic converter includes a primary catalytic converter 9 and a secondary catalytic converter 11, where the primary catalytic converter 9 and the secondary catalytic converter 11 are provided with porous ceramic carriers and precious metal catalysts coated thereon, and cooperate with urea spraying to reduce and catalyze pollutants in the air flow, decompose carbon monoxide and nitrogen oxides in the exhaust gas, and reduce part of high-frequency noise. The first catalytic converter 9 and the second catalytic converter 11 are separated by a certain distance, a second expansion cavity 10 is formed by the first catalytic converter 9 and the second catalytic converter 11 and the muffler shell, a certain silencing effect can be generated when the air flow passes through the second expansion cavity 10, the first catalytic converter 9 carries out preliminary decomposition on pollutants in the exhaust, the second catalytic converter 11 continues to carry out deep decomposition on the exhaust pollutants, and the exhaust gas reaches the exhaust emission requirement after two-stage catalytic conversion.
In order to better decompose pollutants in the exhaust, a sensor mounting seat 8 is arranged on muffler shells on two sides of the catalytic converter, a detection sensor is arranged on the sensor mounting seat 8, the detection sensor comprises an oxygen content and nitrogen oxide content detection sensor, the detection sensor senses the change of the content of specific components of the exhaust and feeds back related signals for controlling the front-end urea nozzle 3, so that the optimal emission control can be achieved under any working condition.
Referring to fig. 1, 3, 5 and 6, after the air flow passes through the catalytic converter, the air flow enters the exhaust structure, and the exhaust structure includes a first partition 13, a second partition 15, a resonance tube 19, an air outlet tube 18 and a rear end cover 17 disposed at the end of the muffler shell.
Wherein the second-stage catalytic converter 11, the first partition plate 13 and the muffler shell form a third expansion chamber 12; the first partition 13 and the second partition 15 and the muffler housing constitute a fourth expansion chamber 14, and the second partition 15 and the rear cover 17 and the muffler housing constitute a resonance chamber 16.
Further, the resonance tube 19 comprises a resonance tube perforated section 1901 and a resonance tube bent pipe section 1902, the resonance tube perforated section 1901 is installed on the first partition 13 and the second partition 15, an air inlet of the resonance tube perforated section 1901 is arranged in the third expansion cavity 12, and a plurality of first tube holes 1903 are formed in the side wall of the resonance tube perforated section 1901 in the fourth expansion cavity 14 at intervals; while the resonator tube bend 1902 is disposed within the resonator chamber 16, the resonator tube perforated section 1901 is a straight tube, the resonator tube bend 1902 is a curved tube, and the exit orifice of the resonator tube bend 1902 is opposite the valve structure 20 on the second baffle 15. When the airflow velocity within the resonator tube elbow segment 1902 is greater than the preset flow velocity value, the valve structure 20 automatically opens; the valve structure 20 automatically closes when the airflow rate within the resonator tube elbow 1902 is less than the preset flow rate value. The air outlet pipe 18 comprises an air outlet pipe perforation section 1801 and a bent pipe section 1803, and the air inlet end of the air outlet pipe perforation section 1801 penetrates through the second partition 15 and extends into the fourth expansion cavity 14; and the air outlet end of the air outlet pipe perforation section 1801 penetrates through the rear end cover 17, extends to the outside of the muffler shell, and is connected with the bent pipe section 1803, so that the air outlet pipe 18 is communicated with the fourth expansion cavity 14 and the external atmosphere. It will be appreciated that when the airflow velocity is low, the airflow velocity is insufficient to open the valve structure 20, and at this time, the valve structure 20 on the second partition 15 is kept in a closed state, and the airflow flows into the fourth expansion chamber 14 through the first pipe hole 1903 on the perforated section 1901 of the resonance pipe, and then is discharged to the atmosphere through the air outlet pipe 18, and the cavity between the second partition 15 and the rear end cover 17 forms the resonance chamber 16, so that the resonance effect is achieved, and low-frequency noise can be effectively controlled; when the airflow velocity is large, the first pipe hole 1903 on the perforated section 1901 of the resonance pipe is small, the resistance passing through the air flow is large enough to open the valve structure 20, the valve structure 20 on the second partition plate 15 is kept in an open state, the valve structure 20 fixed on the second partition plate 15 is opened under the action of the air flow, and the air flow enters the fourth expansion cavity 14 through the resonance pipe 19 and is discharged to the atmosphere through the air outlet pipe 18, so that the air flow can pass through quickly, the flow resistance is reduced, and the exhaust pressure loss is reduced. Therefore, the exhaust structure reduces low-frequency noise in small airflow and reduces flow resistance in large airflow, so that the muffler has the functions of reducing flow resistance and reducing middle-low frequency exhaust noise.
Optionally, with continued reference to fig. 3, an end of the resonator tube bending section 1902, which is far away from the resonator tube perforation section 1901, abuts against the valve structure 20, a resonator tube full perforation tube section 1904 is disposed at an end of the resonator tube bending section 1902, a plurality of rings of third tube holes 1908 are disposed on the resonator tube full perforation tube section 1904, a cascade micro-perforation resonant cavity 1905 is disposed outside the resonator tube perforation section 1901, two third partition plates 1906 are disposed in the cascade micro-perforation resonant cavity 1905, the cascade micro-perforation resonant cavity 1905 is divided into a plurality of chambers with different sizes by the third partition plates 1906, a plurality of rings of micro-perforations 1907 are disposed on a side wall of the resonator tube perforation section 1901, and the sizes of the micro-perforations 1907 correspond to the sizes of the chambers. It can be appreciated that the resonant pipe fully perforated pipe section 1904 is added at the end of the resonant pipe 19, and the end of the resonant pipe fully perforated pipe section 1904 abuts against the valve structure 20; when the airflow velocity is small, as described above, the airflow velocity is insufficient to open the valve structure 20, and the third tube hole 1908 on the resonance tube full-perforated tube section 1904 is used for sound transmission, so that the resonance tube 19 plays a role of resonance silencing; when the airflow velocity is high, the resonant pipe fully perforated pipe section 1904 can guide the airflow to impact the valve structure 20, and the end of the resonant pipe fully perforated pipe section props against the valve structure, so that the airflow can be prevented from being dispersed, the purpose of reducing airflow resistance is achieved, and the exhaust back pressure of the muffler is further reduced. In addition, a cascade micro-perforation resonant cavity 1905 is additionally arranged on the outer side of the resonant tube perforation section 1901, the cascade micro-perforation resonant cavity 1905 is divided into a plurality of chambers with different sizes by a third partition plate 1906, and a circle of micro-perforations 1907 are arranged on the tube wall of the resonant tube 19 corresponding to each chamber; by adjusting the chamber size, the aperture and the number of microperforations 1907, it is possible to adjust the resonance muffling frequency band and bandwidth of the cascaded microperforated resonant cavity 1905. When the airflow speed is smaller, the engine speed is low, the low-frequency order infrasound frequency is also low, and the requirement on the low-frequency silencing capability is high, so that the cascade microperforated resonant cavity 1905 and the resonant tube 19 are mutually coupled, the effect of enhancing the low-frequency silencing capability of the whole silencer is further achieved, and the low-frequency silencing frequency band and bandwidth can be effectively adjusted.
With continued reference to fig. 6, the valve structure 20 includes a circular cover 2001 and a torsion spring 2002, the circular cover 2001 is rotatably connected to a side of the second partition 15 away from the rear end cover 17, and the torsion spring 2002 is sleeved on a rotation shaft of the circular cover 2001. When the airflow rate is small, the airflow is insufficient to overcome the torque of the torsion spring 2002 and thus cannot open the valve structure 20; when the airflow velocity is larger, the torque of the torsion spring 2002 can be overcome by the airflow, and the valve structure 20 is conveniently opened, so that the valve structure 20 can be automatically opened and closed according to the airflow velocity, and the valve structure is convenient to operate and simple in structure.
In order to improve the sealing performance of the circular cover 2001, a rubber gasket may be provided on a surface of the circular cover 2001 that is bonded to the second separator 15.
With continued reference to fig. 5, a resistive bag 1802 is wrapped on a sidewall of the perforated section 1801 of the air outlet pipe, a sound absorbing material is disposed in the resistive bag 1802, and a plurality of second pipe holes 1804 are spaced apart from the sidewall of the perforated section 1801 of the air outlet pipe in contact with the resistive bag 1802. When the exhaust air flow enters the air outlet pipe 18 from the fourth expansion cavity 14, the second pipe hole 1804 formed in the air outlet pipe perforation section 1801 is matched with the resistive packet 1802 wrapped outside the second pipe hole to form a resistive silencing structure, noise in the air outlet pipe 18 is absorbed, the effect of effectively eliminating middle-high frequency band noise in the exhaust noise is achieved, and therefore the sound quality of the exhaust noise is further improved.
The working principle of the integrated exhaust gas purifying muffler according to the present invention will be described in detail with reference to fig. 1 to 6 of the accompanying drawings:
the integrated exhaust purification muffler is connected with an exhaust pipe of the engine through a flange 1, and gas exhausted by the diesel engine flows into a first expansion cavity 5 through an air inlet pipe 2; the urea nozzle 3 is welded on the front end cover 4 and forms a certain included angle with the air inlet pipe 2; the air flow sprayed from the air inlet pipe 2 firstly passes through the eccentric cone structure 6, the eccentric cone 601 causes disturbance to the air flow sprayed into the cavity from the air inlet pipe 2, and the air flow direction is changed, so that more air flow is mixed with urea spray, and the mixture of the air flow and urea spray uniformly enters the multi-ring-shaped spanwise corrugated rod structure 7; the urea spray and air flow mixture passes through the multi-annular spanwise corrugated structure 7, the multi-annular spanwise corrugated structure 7 has good modulation effect on the air flow and urea spray mixture, the tail gas conversion rate is improved, the urea and air flow mixture uniformly enters the primary catalytic converter 9, so that the catalytic efficiency is improved, the mixture passing through the multi-annular spanwise corrugated structure 7 is smoother, the resistance of air flow passing through is reduced, and the exhaust back pressure is reduced; the mixed exhaust gas flow flows into the first-stage catalytic converter 9 to perform catalytic decomposition of exhaust pollutants, and meanwhile, part of high-frequency noise in the exhaust gas can be eliminated, a second expansion cavity 10 is formed between the first-stage catalytic converter 9 and the second-stage catalytic converter 11, and a certain silencing effect can be generated when the gas flow passes through the cavity. After the mixed airflow flows into the two-stage catalytic converter 11, the decomposition of exhaust pollutants is continued, and the exhaust gas after the two-stage catalytic conversion reaches the exhaust gas emission requirement. Meanwhile, detection sensors arranged on the sensor mounting seats 8 on two sides of the catalytic converter sense the change of the content of specific components of the exhaust gas and feed back related signals for controlling the front-end urea injection quantity, so that the optimal emission control can be achieved under any working condition. The purified air flow flows into the third expansion cavity 12, when the air flow speed is smaller, the air flow flows into the fourth expansion cavity 14 through the first pipe hole 1903 on the resonance pipe 19, and then is discharged into the atmosphere through the air outlet pipe 18, at the moment, the valve structure 20 on the second partition plate 15 is closed, and the resonance cavity 16 formed by the second partition plate 15 and the rear end cover 17 of the muffler can effectively control low-frequency noise; when the flow rate of the air flow is high, the valve structure 20 is opened under the guiding action of the resonant pipe full-perforated pipe section 1904, the air flow enters the fourth expansion cavity 14 and then is discharged into the atmosphere through the air outlet pipe 18, and the air flow is not dispersed in the resonant cavity 16, so that the exhaust back pressure of the muffler can be reduced. The exhaust air flow enters the air outlet pipe 18 from the fourth expansion cavity 14, the air outlet pipe perforation section 1801 on the air outlet pipe 18 is matched with the outer wrapped resistive packet 1802 to form a resistive silencing structure, medium-high frequency noise in the exhaust noise can be effectively eliminated, and finally the exhaust air flow is discharged into the atmosphere through the curved pipe section 1803.
After the exhaust air flow passes through the structure, the discharged pollutants finally reach the exhaust emission requirement through catalytic conversion, and the exhaust noise is controlled through resonance and resistance, so that the sound quality of the exhaust noise is improved.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the invention.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.
It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application for the embodiment. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (8)
1. An integrated exhaust purifying muffler, comprising:
the muffler comprises a muffler shell, wherein an air inlet pipe is arranged at one side of the muffler shell and is used for being connected with an exhaust pipe of an engine;
the mixing structure is arranged on one side, close to the air inlet pipe, of the inner cavity of the silencer shell and comprises an airflow disturbance structure and a modulation structure, and the airflow disturbance structure is used for disturbing airflow sprayed into the inner cavity of the silencer shell; the modulation structure is used for fully mixing the reducing agent spray and the air flow;
the exhaust structure is arranged at one side of the inner cavity of the muffler shell, which is far away from the air inlet pipe, and a resonant cavity is formed on the exhaust structure and used for reducing exhaust noise through resonance;
the catalytic converter is arranged between the mixing structure and the silencing structure and is used for carrying out catalytic conversion on pollutants in the fully mixed airflow;
the air flow disturbance structure comprises an eccentric cone structure arranged in the inner cavity of the silencer shell, the eccentric cone structure comprises an eccentric cone, the eccentric cone is arranged in a first circular ring, the first circular ring is fixed on the inner wall of the silencer shell, and the tip end of the eccentric cone is opposite to the air outlet of the air inlet pipe;
the modulation structure comprises a multi-annular expanding corrugated rod structure, the multi-annular expanding corrugated rod structure comprises a plurality of annular expanding corrugated rods with different radiuses, the annular expanding corrugated rods are fixed on a second circular ring, and the second circular ring is fixed on the inner wall of the silencer shell.
2. An integrated exhaust purifying muffler according to claim 1, wherein: the silencer casing is provided with the front end cover far away from exhaust structure's one end, the intake pipe is installed on the front end cover, and still welds the reductant nozzle on the front end cover, the contained angle between reductant nozzle and the air outlet direction of intake pipe is 10~ 20.
3. An integrated exhaust purifying muffler according to claim 1, wherein: the number of the multi-ring-shaped spanwise corrugated rod structures is two, the inner cavities of the silencer shell are arranged at intervals along the airflow flowing direction, and projections of the ring-shaped spanwise corrugated rods on the two multi-ring-shaped spanwise corrugated rod structures on each other are arranged in a staggered mode.
4. An integrated exhaust purifying muffler according to claim 1, wherein:
the catalytic converter comprises a first catalytic converter and a second catalytic converter, porous ceramic carriers and noble metal catalysts are arranged on the first catalytic converter and the second catalytic converter, a distance is reserved between the first catalytic converter and the second catalytic converter, and a second expansion cavity is formed between the second catalytic converter and the muffler shell.
5. An integrated exhaust purifying muffler as defined in claim 4, wherein:
the two sides of the catalytic converter are provided with detection sensors which are used for detecting the oxygen content and the nitrogen oxide content in the airflow.
6. An integrated exhaust purifying muffler according to claim 1, wherein: the exhaust structure comprises a first baffle plate, a second baffle plate, a resonance tube, an air outlet tube and a rear end cover, wherein the first baffle plate, the second baffle plate, the resonance tube and the air outlet tube are arranged in the inner cavity of the muffler shell;
the catalytic converter, the first partition plate and the muffler shell form a third expansion cavity; the first partition plate, the second partition plate and the muffler shell form a fourth expansion cavity, and the second partition plate, the rear end cover and the muffler shell form a resonant cavity;
the resonance tube comprises a resonance tube perforation section and a resonance tube bending section, the resonance tube perforation section is arranged on the first partition plate and the second partition plate, an air inlet of the resonance tube perforation section is arranged in the third expansion cavity, a plurality of first tube holes are formed in the side wall of the resonance tube perforation section in the fourth expansion cavity at intervals, the resonance tube bending section is arranged in the resonance cavity, and an air outlet hole of the resonance tube bending section is opposite to a valve structure on the second partition plate;
when the airflow velocity in the resonance tube elbow section is larger than a preset flow velocity value, the valve structure is opened; when the airflow velocity in the resonance tube elbow section is smaller than a preset flow velocity value, the valve structure is closed;
the air outlet pipe comprises an air outlet pipe perforation section and a bending pipe section, and the air inlet end of the air outlet pipe perforation section penetrates through the second partition plate and extends into the fourth expansion cavity; the air outlet end of the air outlet pipe perforation section penetrates through the rear end cover, extends to the outside of the muffler shell, and is connected with the bent pipe section.
7. An integrated exhaust purifying muffler as defined in claim 6, wherein: the valve structure comprises a round cover and a torsion spring, wherein the round cover is rotationally connected to one surface, far away from the rear end cover, of the second partition board, and the torsion spring is sleeved on a rotating shaft of the round cover.
8. An integrated exhaust purifying muffler as defined in claim 6, wherein: the utility model discloses a resonance tube, including resonance tube, resonance tube perforation section, valve structure, resonance tube bend section, valve structure is supported to the one end that the resonance tube bend section kept away from the resonance tube perforation section, resonance tube bend section is terminal to be provided with resonance tube full perforation section, a plurality of rings of third tube holes have been seted up on the resonance tube full perforation section, resonance tube perforation section outside is provided with cascade microperforation resonant cavity, cascade microperforation resonant cavity is provided with the third baffle in, and cascade microperforation resonant cavity is cut apart into the different cavity of a plurality of size by the third baffle, has seted up a plurality of rings of microperforations on the resonance tube perforation section lateral wall, the size of microperforation hole corresponds with the size of cavity.
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| CN202310715507.4A CN116480439B (en) | 2023-06-16 | 2023-06-16 | Integrated exhaust purification muffler |
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| CN202310715507.4A CN116480439B (en) | 2023-06-16 | 2023-06-16 | Integrated exhaust purification muffler |
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| JP2006125238A (en) * | 2004-10-27 | 2006-05-18 | Futaba Industrial Co Ltd | Muffler for internal combustion engine |
| US20140151148A1 (en) * | 2012-12-05 | 2014-06-05 | Caterpillar Inc. | Exhaust muffler |
| CN204877595U (en) * | 2015-07-08 | 2015-12-16 | 中国船舶重工集团公司第七一九研究所 | Car exhaust muffler with air purification function |
| CN107701264A (en) * | 2017-11-25 | 2018-02-16 | 华东交通大学 | A kind of integral exhaust purifying muffler for being used to improve sound quality |
| CN207813709U (en) * | 2017-09-27 | 2018-09-04 | 比亚迪股份有限公司 | Silencer and vehicle with it |
| US20210131323A1 (en) * | 2019-10-31 | 2021-05-06 | Hyundai Motor Company | Muffler for vehicle for implementing sporty exhaust sound |
| CN215719049U (en) * | 2021-06-28 | 2022-02-01 | 长城汽车股份有限公司 | Exhaust muffler and vehicle |
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2023
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006125238A (en) * | 2004-10-27 | 2006-05-18 | Futaba Industrial Co Ltd | Muffler for internal combustion engine |
| US20140151148A1 (en) * | 2012-12-05 | 2014-06-05 | Caterpillar Inc. | Exhaust muffler |
| CN204877595U (en) * | 2015-07-08 | 2015-12-16 | 中国船舶重工集团公司第七一九研究所 | Car exhaust muffler with air purification function |
| CN207813709U (en) * | 2017-09-27 | 2018-09-04 | 比亚迪股份有限公司 | Silencer and vehicle with it |
| CN107701264A (en) * | 2017-11-25 | 2018-02-16 | 华东交通大学 | A kind of integral exhaust purifying muffler for being used to improve sound quality |
| US20210131323A1 (en) * | 2019-10-31 | 2021-05-06 | Hyundai Motor Company | Muffler for vehicle for implementing sporty exhaust sound |
| CN215719049U (en) * | 2021-06-28 | 2022-02-01 | 长城汽车股份有限公司 | Exhaust muffler and vehicle |
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| CN116480439B (en) | 2023-08-29 |
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