CN111434901A - Silencer combination test method - Google Patents
Silencer combination test method Download PDFInfo
- Publication number
- CN111434901A CN111434901A CN201910032713.9A CN201910032713A CN111434901A CN 111434901 A CN111434901 A CN 111434901A CN 201910032713 A CN201910032713 A CN 201910032713A CN 111434901 A CN111434901 A CN 111434901A
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- China
- Prior art keywords
- silencing
- combined
- units
- muffler
- silencer
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/02—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate silencers in series
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- 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
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- 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
- F01N1/082—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling the gases passing through porous members
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- 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
- F01N1/165—Silencing apparatus characterised by method of silencing by using movable parts for adjusting flow area
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- 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
- F01N1/166—Silencing apparatus characterised by method of silencing by using movable parts for changing gas flow path through the silencer or for adjusting the dimensions of a chamber or a pipe
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/11—Analysing solids by measuring attenuation of acoustic waves
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Acoustics & Sound (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Exhaust Silencers (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention provides a muffler combination test method, and belongs to the technical field of vehicle spare and accessory parts. The method comprises the following steps: more than two silencing units are detachably assembled in a sealing manner through the air inlet and/or the air outlet of the silencing units to obtain a combined silencer; the combined muffler was tested. When the method is used for carrying out the combination test of the silencing units, the silencing units can be quickly combined according to different combination sequences in a detachable sealing assembly mode, or new silencing units are replaced or added, then the silencing effect test is carried out on the obtained combined silencers with various structures, and when the ideal silencing effect is obtained, the formal structure design of the combined silencer can be carried out according to the parameters of the sample at the moment; in the research and development process, sample pieces of the combined silencer do not need to be repeatedly manufactured, the research and development period can be effectively shortened, and the research and development progress is accelerated.
Description
Technical Field
The invention relates to a muffler combination test method, and belongs to the technical field of vehicle spare and accessory parts.
Background
In the research and development process of the vehicle air intake and exhaust system, different silencing units need to be subjected to a combination test in consideration of different silencing frequencies aimed at by the different silencing units, so that a combined silencer with the optimal silencing effect is obtained, and the vehicle air intake and exhaust system achieves the ideal silencing effect.
The existing combined silencer is a composite silencing structure, namely, various silencer structures such as an expansion cavity type and a resonant cavity type are integrated in one combined silencer, the combined silencer is complex in structure, after the internal composite structure of the combined silencer is designed, corresponding rapid sample pieces need to be manufactured firstly, then the rapid sample pieces are used for test verification, and if the sample piece parameters are proper and the intake and exhaust silencing effects are good, formal structural design of the combined silencer is carried out according to the sample piece parameters; if the parameters of the sample piece are not appropriate and the intake and exhaust silencing effects are not ideal, the sample piece of the combined silencer needs to be manufactured again for repeated tests until the appropriate parameters of the sample piece are determined, so that the waste of time and money is caused, the research and development period is prolonged, and the research and development progress is influenced.
Disclosure of Invention
The invention aims to provide a silencer combination test method, which is used for solving the problems of long research and development period and slow research and development progress in the research and development process of the conventional combined silencer.
In order to achieve the aim, the invention provides a muffler combination test method, which comprises the following steps:
more than two silencing units are detachably assembled in a sealing manner through the air inlet and/or the air outlet of the silencing units to obtain a combined silencer;
the combined muffler was tested.
When the method is used for carrying out the combination test of the silencing units, the silencing units can be quickly combined according to different combination sequences in a detachable sealing assembly mode, or new silencing units are replaced or added, then the silencing effect test is carried out on the obtained combined silencers with various structures, and when the ideal silencing effect is obtained, the formal structure design of the combined silencer can be carried out according to the parameters of the sample at the moment; in the research and development process, sample pieces of the combined silencer do not need to be repeatedly manufactured, the research and development period can be effectively shortened, and the research and development progress is accelerated.
In order to better realize the detachable sealing assembly, the detachable sealing assembly is in a threaded connection as an improvement on the silencer combined test method.
In order to provide a type of the sound-deadening unit, as another modification of the above-described muffler combination test method, the sound-deadening unit is one of the following three sound-deadening units: the adjustable expansion cavity type silencing unit comprises an adjustable expansion cavity type silencing unit, an adjustable resonant cavity type silencing unit and an adjustable perforation type silencing unit.
Drawings
FIG. 1 is a schematic illustration of a muffler unit combination test using the method of the present invention;
FIG. 2 shows an adjustable expansion chamber muffler unit X according to the present invention1Schematic structural diagram of (a);
FIG. 3 is an adjustable resonator muffler unit X of the present invention2Schematic structural diagram of (a);
FIG. 4 is an adjustable perforated muffler unit X of the present invention3Schematic structural diagram of (a);
in the figure, X1The adjustable expansion cavity type silencing unit; x2The adjustable resonant cavity type silencing unit; x3The adjustable perforated silencing unit; 2-1, expanding the cavity; 2-2, an air inlet pipe; 2-3, a motor controller; 2-4, electricityA machine; 2-5, a stud; 2-6, a partition board; 2-7, an air outlet pipe; 2-8, a first chamber; 2-9, a second chamber; 3-1, a resonant cavity; 3-2, an air inlet pipe; 3-3, a motor controller; 3-4, a motor; 3-5, a stud; 3-6, a partition board; 3-7, an air outlet pipe; 3-8, a first chamber; 3-9, a second chamber; 3-10, connecting pipe; 4-1, a muffler shell; 4-2, an inner cylinder; 4-3, a shielding cylinder; 4-4, driving the cylinder; 4-5, a fixed arm; 4-6, a motor; 4-7, a motor controller; 4-8, an air inlet pipe; 4-9 parts of an air outlet pipe; 4-10 and a guide groove.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The 3 types of sound attenuation units shown in fig. 1 are respectively: adjustable expansion cavity type silencing unit X1Adjustable resonant cavity type silencing unit X2Adjustable perforated silencing unit X3。
Adjustable expansion cavity type silencing unit X1As shown in fig. 2: the silencing unit comprises an expansion cavity 2-1 on the pipeline, the pipeline comprises an air inlet pipe 2-2 and an air outlet pipe 2-7, and a partition plate 2-6 and a driving mechanism for driving the partition plate 2-6 are arranged in the expansion cavity 2-1; the clapboard 2-6 is in sliding seal fit with the inner side wall of the expansion cavity 2-1 to divide the expansion cavity 2-1 into a first cavity 2-8 communicated with the pipeline and a second cavity 2-9 not communicated with the pipeline; the driving mechanism is arranged in the second chamber 2-9 and is a stud nut mechanism, the partition plate 2-6 is fixed at one end of a stud 2-5, a nut is assembled at the other end of the stud 2-5, and the nut is coaxially connected with the motor 2-4; the axial direction of the studs 2-5 is perpendicular to the axial direction of the pipeline. Wherein, the motor 2-4 is connected with a motor controller 2-3 positioned outside the expansion cavity 2-1.
The silencing unit can drive the screw nut to rotate by using the motor 2-4 to drive the stud 2-5 to lift, and further control the partition board 2-6 to lift, so that the size of the cross section area N of the first chamber 2-8 can be flexibly adjusted, and the aim of changing the silencing effect is fulfilled.
Adjustable resonant cavity type silencing unit X2As shown in fig. 3: the silencing unit comprises a resonant cavity3-1 and a connecting pipe 3-10, wherein a partition plate 3-6 and a driving mechanism for driving the partition plate 3-6 are arranged in the resonant cavity 3-1; the baffle 3-6 is in sliding seal fit with the inner side wall of the resonant cavity 3-1 to divide the resonant cavity 3-1 into a first chamber 3-8 communicated with the connecting pipe 3-10 and a second chamber 3-9 not communicated with the connecting pipe 3-10; the driving mechanism is arranged in the second chamber 3-9 and is a stud nut mechanism, the partition plate 3-6 is fixed at one end of a stud 3-5, a nut is assembled at the other end of the stud 3-5, and the nut is coaxially connected with the motor 3-4; the axial direction of the stud 3-5 is parallel to the axial direction of the connecting pipe 3-10. The connecting pipe 3-10 is connected with a pipeline, the pipeline comprises an air inlet pipe 3-2 and an air outlet pipe 3-7, and the motor 3-4 is connected with a motor controller 3-3 positioned on the outer side of the resonant cavity 3-1.
The silencing unit can drive the screw nut to rotate by using the motor 3-4 to drive the stud 3-5 to lift, and further control the partition board 3-6 to lift, so that the size of the volume of the first chamber 3-8 is flexibly adjusted, and the aim of changing the silencing effect is fulfilled.
Adjustable perforated silencing unit X3As shown in fig. 4: the silencing unit comprises a silencer shell 4-1 and an inner cylinder 4-2 used for communicating an airflow channel, wherein silencing holes are distributed on the inner cylinder 4-2, the silencer shell 4-1 is arranged on the outer side of the inner cylinder 4-2, and a silencing cavity is formed by a cavity between the silencer shell 4-1 and the inner cylinder 4-2; in the silencing cavity, a shielding cylinder 4-3 moving along the extension direction of the inner cylinder is sleeved on the inner cylinder 4-2, the shielding cylinder 4-3 is in transmission connection with a driving cylinder 4-4 through threaded matching, the shielding cylinder 4-3 is also connected with a fixed arm 4-5, one end of the fixed arm 4-5 is fixed on the inner side of a silencer shell 4-1, the other end of the fixed arm 4-5 is in sliding fit with a guide groove 4-10 on the outer wall of the shielding cylinder 4-3, and the guide groove 4-10 is arranged along the extension direction of the inner cylinder; the driving cylinder 4-4 is connected with a motor 4-6.
Wherein, the motor 4-6 is also connected with a motor controller 4-7 positioned at the outer side of the silencer shell 4-1, the air inlet end of the inner cylinder 4-2 is also connected with an air inlet pipe 4-8, and the air outlet end is also connected with an air outlet pipe 4-9.
The silencing unit can drive the driving barrel 4-4 to rotate by utilizing the motor 4-6, the shielding barrel 4-3 is limited by the fixing arm 4-5 and the guide groove 4-10, only moves horizontally along the extension direction of the inner barrel 4-2 under the drive of the driving barrel 4-4, the motor controller 4-7 controls the rotation direction and the rotation number of the motor 4-6, further controls the movement direction and the movement distance of the shielding barrel 4-3, and adjusts the number of silencing holes exposed on the inner barrel 4-2, so that the aim of changing the silencing effect of the silencing unit is fulfilled.
The air inlet pipe and/or the air outlet pipe of each silencing unit are/is provided with a threaded joint used for being assembled with other silencing units.
When the method is used for carrying out the combination test of the silencing unit, firstly, the adjustable expansion cavity type silencing unit X is used1Adjustable resonant cavity type silencing unit X2Adjustable perforated silencing unit X3Assembling the two components together in a threaded connection (namely, detachable sealing assembly) mode according to a preset combination sequence to obtain a combined silencer; then, by changing the adjustable expanding cavity type silencing unit X1The cross-sectional area of the first chamber 2-8, and the adjustable resonant cavity type silencing unit X2Of the first chamber 3-8, varying the adjustable piercing silencing unit X3The number of the silencing holes (namely sample parameters) exposed on the inner cylinder 4-2 enables the combined silencer to achieve the best silencing effect, and the sample parameters of each silencing unit at the moment are recorded for formal structural design of the combined silencer.
When the combined test of the silencing units is carried out, the combination sequence of the silencing units can be flexibly adjusted according to the actual test requirements, or the silencing units with adjustable parameters of new sample pieces are replaced or added, so that a new combined silencer is obtained, for example, the silencing units with adjustable silencing hole diameters are replaced or added, or the silencing units with the adjustable quantity of silencing holes and the adjustable diameter of silencing holes are simultaneously replaced or added.
As another embodiment, when the noise cancellation unit combination test is performed, each noise cancellation unit in fig. 1 may be replaced with a noise cancellation unit whose sample parameter is not adjustable, or replaced with a combination of a noise cancellation unit whose sample parameter is adjustable and a noise cancellation unit whose sample parameter is not adjustable.
As other embodiments, the adjustable expanding cavity type muffler unit X1The utility model discloses a silencer in the utility model patent document with publication number CN203857657U, adjustable resonant cavity formula noise elimination can also be adoptedUnit X2The muffler in the invention patent application with application publication No. CN107654272A, the adjustable perforated muffling unit X3The muffler of the utility model patent document with publication number CN207647651U may also be used.
In summary, when the method of the present invention is used for the combination test of the sound-deadening units, the sound-deadening units can be rapidly combined according to different combination orders in a detachable sealing assembly manner, or new sound-deadening units are replaced or added, and then the sound-deadening effect test is performed on the obtained combined mufflers of various structures, and when an ideal sound-deadening effect is obtained, the formal structure design of the combined muffler can be performed according to the parameters of the sample at this time; in the research and development process, sample pieces of the combined silencer do not need to be repeatedly manufactured, the research and development period can be effectively shortened, and the research and development progress is accelerated.
The detachable sealing assembly in this embodiment is a threaded connection, wherein one of the silencing units is an internal thread, and the corresponding other silencing unit is an external thread; as other embodiments, the detachable sealing assembly can be realized by inserting and matching and fixing by utilizing a clamping hoop.
In another embodiment, when the noise cancellation units are screwed, a pipe having a certain length may be additionally provided between the noise cancellation units, and the noise cancellation units may be coupled to other noise cancellation units by screws provided on the pipe.
Claims (3)
1. A muffler combination test method is characterized by comprising the following steps:
more than two silencing units are detachably assembled in a sealing manner through the air inlet and/or the air outlet of the silencing units to obtain a combined silencer;
the combined muffler was tested.
2. The muffler combination testing method of claim 1, wherein the removable seal assembly is a threaded connection.
3. The muffler combination testing method according to claim 2, wherein the muffler unit is one of the following three muffler units: the adjustable expansion cavity type silencing unit comprises an adjustable expansion cavity type silencing unit, an adjustable resonant cavity type silencing unit and an adjustable perforation type silencing unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910032713.9A CN111434901A (en) | 2019-01-14 | 2019-01-14 | Silencer combination test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910032713.9A CN111434901A (en) | 2019-01-14 | 2019-01-14 | Silencer combination test method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111434901A true CN111434901A (en) | 2020-07-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910032713.9A Pending CN111434901A (en) | 2019-01-14 | 2019-01-14 | Silencer combination test method |
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| CN (1) | CN111434901A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201218125Y (en) * | 2008-06-04 | 2009-04-08 | 比亚迪股份有限公司 | Adjustable offset silencer |
| CN103486394A (en) * | 2013-09-30 | 2014-01-01 | 同济大学 | Variable-frequency microperforated pipe silencer with variable perforation section lengths |
| CN203549259U (en) * | 2013-09-30 | 2014-04-16 | 同济大学 | Frequency-adjustable micro-perforated pipe muffler with variable-volume expanding cavity |
| CN204552905U (en) * | 2015-03-31 | 2015-08-12 | 武汉理工大学 | The silencing apparatus that a kind of frequency of noise elimination is adjustable |
| DE102014016448A1 (en) * | 2014-11-06 | 2016-05-12 | Man Diesel & Turbo Se | Exhaust gas aftertreatment device and method for exhaust aftertreatment |
| CN108412581A (en) * | 2018-04-23 | 2018-08-17 | 吉林大学 | A kind of variable displacement leads directly to impedance complex muffler and its control method |
-
2019
- 2019-01-14 CN CN201910032713.9A patent/CN111434901A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201218125Y (en) * | 2008-06-04 | 2009-04-08 | 比亚迪股份有限公司 | Adjustable offset silencer |
| CN103486394A (en) * | 2013-09-30 | 2014-01-01 | 同济大学 | Variable-frequency microperforated pipe silencer with variable perforation section lengths |
| CN203549259U (en) * | 2013-09-30 | 2014-04-16 | 同济大学 | Frequency-adjustable micro-perforated pipe muffler with variable-volume expanding cavity |
| DE102014016448A1 (en) * | 2014-11-06 | 2016-05-12 | Man Diesel & Turbo Se | Exhaust gas aftertreatment device and method for exhaust aftertreatment |
| CN204552905U (en) * | 2015-03-31 | 2015-08-12 | 武汉理工大学 | The silencing apparatus that a kind of frequency of noise elimination is adjustable |
| CN108412581A (en) * | 2018-04-23 | 2018-08-17 | 吉林大学 | A kind of variable displacement leads directly to impedance complex muffler and its control method |
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Application publication date: 20200721 |