CN114412674A - Noise reduction method for filter element of air filter - Google Patents
Noise reduction method for filter element of air filter Download PDFInfo
- Publication number
- CN114412674A CN114412674A CN202111607473.4A CN202111607473A CN114412674A CN 114412674 A CN114412674 A CN 114412674A CN 202111607473 A CN202111607473 A CN 202111607473A CN 114412674 A CN114412674 A CN 114412674A
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- Prior art keywords
- filter element
- air filter
- air
- reducing noise
- noise
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000009467 reduction Effects 0.000 title claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 24
- 238000001914 filtration Methods 0.000 claims abstract description 10
- 238000012360 testing method Methods 0.000 claims abstract description 4
- 238000004898 kneading Methods 0.000 claims description 9
- 240000005020 Acaciella glauca Species 0.000 claims description 6
- 244000086363 Pterocarpus indicus Species 0.000 claims description 6
- 235000009984 Pterocarpus indicus Nutrition 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 6
- 239000002657 fibrous material Substances 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- 235000003499 redwood Nutrition 0.000 claims description 6
- 229920002522 Wood fibre Polymers 0.000 claims description 5
- 239000002025 wood fiber Substances 0.000 claims description 5
- 239000000835 fiber Substances 0.000 claims description 3
- 239000002023 wood Substances 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 2
- 230000008030 elimination Effects 0.000 abstract description 4
- 238000003379 elimination reaction Methods 0.000 abstract description 4
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000030279 gene silencing Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000003584 silencer Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/02—Air cleaners
- F02M35/024—Air cleaners using filters, e.g. moistened
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention provides a noise reduction method of an air filter element, which comprises the following steps: s10, determining the material of the filter element based on the purpose of reducing noise; s20, establishing a model of the air filter, and performing modal analysis on the resonant frequency range of the filter element under the natural frequency; s30, performing an orthogonal test on the structural parameters of the filter element on the premise of ensuring the filtering performance of the filter element; and S40, determining the optimal structure parameters of the filter element according to the analysis results of the steps S20-S30. The invention provides a noise reduction method of an air filter element, which not only can well reduce noise, but also has simple structure and wide range of noise elimination frequency.
Description
Technical Field
The invention relates to the technical field of air filtration, in particular to a noise reduction method for an air filter element.
Background
The engine air filter is one of the most main components of an automobile engine, and has the main functions of purifying air entering an engine cylinder and reducing engine intake noise. The main component of engine intake noise is aerodynamic noise. The intake noise is generated by pressure fluctuation caused by the periodic opening and closing of the intake valve and high-speed airflow flowing through the intake valve channel during the intake process.
At present, an air inlet silencer is added to an engine to reduce noise, the noise can be well reduced, the complexity of an air inlet system is increased, the silencing frequency is limited, and therefore, the noise reduction capability of an air filter of the engine is very worthy of study.
Disclosure of Invention
The invention aims to provide a noise reduction method for an air filter element, which aims to solve the problems.
In order to achieve the purpose, the invention provides the following technical scheme: a method of reducing noise in an air filter cartridge, comprising the steps of:
s10, determining the material of the filter element based on the purpose of reducing noise;
s20, establishing a model of the air filter, and performing modal analysis on the resonant frequency range of the filter element under the natural frequency;
s30, performing an orthogonal test on the structural parameters of the filter element on the premise of ensuring the filtering performance of the filter element;
and S40, determining the optimal structure parameters of the filter element according to the analysis results of the steps S20-S30.
As a modification of the present invention, in step S10, a rosewood fiber material is used as a filler material of the filter element.
As a modification of the present invention, in step S10, the preparation step of the redwood fiber material includes:
s11, adopting a chipper to shave the wood into thin slices with the thickness of less than 6 mm;
s12, feeding the slices processed in the step S11 into a silk kneading machine for kneading;
s13, after the silk kneading is finished, the rosewood fiber with the width of 0.2-0.5mm and the length of 20-80mm is screened.
As a modification of the present invention, in step S20, the model parameters of the air cleaner include a housing shape and size, a density of the filter element packing material, and an intake sound wave frequency.
As a modification of the present invention, in step S20, when the intake sound wave frequency is 120Hz-350Hz, the air filter will generate resonance phenomenon.
As an improvement of the present invention, in the model of the air cleaner, the sound transmission loss is calculated using the formula (1),
wherein S isiIs the area of the inlet end of the air filter S0Is the area of the outlet end of the air filter, PiIs incident sound pressure, PtIs a transmitted sound pressure.
As a refinement of the invention, according to step S40, the parameters of the filter cartridge are selected as: the red wood fiber is used as a preparation material, the filling material is 0.05, and the length and the width are respectively set to be 20cm and 15 cm.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Detailed Description
The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is in no way intended to limit the invention.
A method of reducing noise in an air filter cartridge, comprising the steps of:
s10, determining the material of the filter element based on the purpose of reducing noise;
s20, establishing a model of the air filter, and performing modal analysis on the resonant frequency range of the filter element under the natural frequency;
s30, performing an orthogonal test on the structural parameters of the filter element on the premise of ensuring the filtering performance of the filter element;
and S40, determining the optimal structure parameters of the filter element according to the analysis results of the steps S20-S30.
As an embodiment of the present invention, in step S10, a rosewood fiber material is used as a filling material of the filter element.
As an embodiment of the present invention, in step S10, the preparation step of the redwood fiber material includes:
s11, adopting a chipper to shave the wood into thin slices with the thickness of less than 6 mm;
s12, feeding the slices processed in the step S11 into a silk kneading machine for kneading;
s13, after the silk kneading is finished, the rosewood fiber with the width of 0.2-0.5mm and the length of 20-80mm is screened.
As an embodiment of the present invention, in step S20, the model parameters of the air cleaner include a housing shape and size, a density of the filter element filling material, and an intake sound wave frequency.
In step S20, the air cleaner resonates when the intake sound wave frequency is 120Hz to 350 Hz.
In the model of the air cleaner, as an embodiment of the present invention, the sound transmission loss is calculated using the formula (1),
wherein S isiIs the area of the inlet end of the air filter S0Is the area of the outlet end of the air filter, PiIs incident sound pressure, PtIs a transmitted sound pressure.
As an embodiment of the invention, according to step S40, the parameters of the filter cartridge are selected as: the red wood fiber is used as a preparation material, the filling material is 0.05, and the length and the width are respectively set to be 20cm and 15 cm.
The working principle and the beneficial effects of the technical scheme are as follows:
the air filter mainly functions to filter dust particles with relatively large diameters in the intake air flow, so that the quality of air entering the cylinder can be guaranteed, the service life of the engine can be guaranteed, and therefore the air filter is one of important parts of an automobile engine. Another function of the air cleaner is to reduce the intake noise of the engine. The main evaluation indexes for evaluating the performance of the air filter element of the engine comprise filtering efficiency, filtering resistance, ash storage capacity and the like. The filtering efficiency is related to whether the air filter can meet the specified use requirement, the filtering resistance is related to the air inlet resistance, the dynamic property and the like of the engine, and the ash storage capacity reflects the service life of the air filter element.
The parameters that the air cleaner needs to determine include: air cleaner housing shape and size, filter element material, packing material density, intake acoustic frequency, and the like. The air cleaner utilized in the modeling was that of a conventional diesel vehicle, and the only change from the previous conventional air cleaner was in the filter element material and density change. In the analysis of structural factors influencing the filtering performance of the filter element, the filling rate of each filter element and the filter element are obtainedThe effect of the material on the performance of the filter element. Then on the basis, the noise reduction characteristic of the filter element is analyzed, the noise reduction experiment of the air filter element is carried out, and the noise reduction experiment is compared with the sound transmission loss data obtained by the previous simulation, and the result shows that: the higher the filling rate is, the higher the sound absorption coefficient is; in the low-frequency domain (including 63Hz,125Hz), the sound absorption coefficient is higher; the noise elimination of the high-filling rate wood fiber material is better than that of the low-filling rate material under the high-frequency condition of 0.05 filling rate at high frequency, wherein the noise elimination transmission loss of the 0.04 filling rate filter element is about 2dB less than that of the 0.05 filling rate filter element at 1000Hz and 2000Hz, and the transmission loss of the 0.05 filling rate filter element is less than 0.4dB less than that of the 0.06 filling rate filter element. Under the condition of medium frequency, the sound attenuation condition of the wood fiber material is almost the same as that of the paper material. The filter element with the filling rate of 0.05 is superior to other filter elements by combining three basic performances of the filter element and noise reduction performance consideration.
The invention provides a noise reduction method of an air filter element, which not only can well reduce noise, but also has simple structure and wide range of noise elimination frequency.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (7)
1. A noise reduction method for an air filter element is characterized by comprising the following steps:
s10, determining the material of the filter element based on the purpose of reducing noise;
s20, establishing a model of the air filter, and performing modal analysis on the resonant frequency range of the filter element under the natural frequency;
s30, performing an orthogonal test on the structural parameters of the filter element on the premise of ensuring the filtering performance of the filter element;
and S40, determining the optimal structure parameters of the filter element according to the analysis results of the steps S20-S30.
2. A method of reducing noise in an air filter cartridge according to claim 1, wherein: in step S10, a rosewood fiber material is used as a filler material for the filter element.
3. A method of reducing noise in an air filter cartridge according to claim 1, wherein: in step S10, the preparation of the redwood fiber material includes:
s11, adopting a chipper to shave the wood into thin slices with the thickness of less than 6 mm;
s12, feeding the slices processed in the step S11 into a silk kneading machine for kneading;
s13, after the silk kneading is finished, the rosewood fiber with the width of 0.2-0.5mm and the length of 20-80mm is screened.
4. A method of reducing noise in an air filter cartridge according to claim 1, wherein: in step S20, the model parameters of the air cleaner include a housing shape and size, a density of the filter element filling material, and an intake sound wave frequency.
5. A method of reducing noise in an air filter cartridge according to claim 1, wherein: in step S20, when the intake sound wave frequency is 120Hz to 350Hz, the air filter may resonate.
6. A method of reducing noise in an air filter cartridge according to claim 1, wherein: in the model of the air cleaner, the sound transmission loss is calculated using the formula (1),
wherein S isiFor air filtersArea of mouth end, S0Is the area of the outlet end of the air filter, PiIs incident sound pressure, PtIs a transmitted sound pressure.
7. A method of reducing noise in an air filter cartridge according to claim 1, wherein the parameters of the cartridge are selected in accordance with step S40 as follows: the red wood fiber is used as a preparation material, the filling material is 0.05, and the length and the width are respectively set to be 20cm and 15 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111607473.4A CN114412674A (en) | 2021-12-26 | 2021-12-26 | Noise reduction method for filter element of air filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111607473.4A CN114412674A (en) | 2021-12-26 | 2021-12-26 | Noise reduction method for filter element of air filter |
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| Publication Number | Publication Date |
|---|---|
| CN114412674A true CN114412674A (en) | 2022-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111607473.4A Pending CN114412674A (en) | 2021-12-26 | 2021-12-26 | Noise reduction method for filter element of air filter |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110249829A1 (en) * | 2010-04-13 | 2011-10-13 | Mann+Hummel Gmbh | Sound transmitting device |
| CN103899385A (en) * | 2012-12-27 | 2014-07-02 | 东北林业大学 | Intelligent detachable type diesel engine tail gas particulate filter |
| CN104791159A (en) * | 2015-03-13 | 2015-07-22 | 浙江海德曼过滤技术有限公司 | Multi-level cyclone pipe type engineering machinery air filter |
| CN206429322U (en) * | 2017-01-04 | 2017-08-22 | 东北林业大学 | A kind of engine air filter |
| US20200232429A1 (en) * | 2019-01-21 | 2020-07-23 | Toledo Molding & Die, Inc. | Inline high frequency fiber silencer |
-
2021
- 2021-12-26 CN CN202111607473.4A patent/CN114412674A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110249829A1 (en) * | 2010-04-13 | 2011-10-13 | Mann+Hummel Gmbh | Sound transmitting device |
| CN103899385A (en) * | 2012-12-27 | 2014-07-02 | 东北林业大学 | Intelligent detachable type diesel engine tail gas particulate filter |
| CN104791159A (en) * | 2015-03-13 | 2015-07-22 | 浙江海德曼过滤技术有限公司 | Multi-level cyclone pipe type engineering machinery air filter |
| CN206429322U (en) * | 2017-01-04 | 2017-08-22 | 东北林业大学 | A kind of engine air filter |
| US20200232429A1 (en) * | 2019-01-21 | 2020-07-23 | Toledo Molding & Die, Inc. | Inline high frequency fiber silencer |
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Application publication date: 20220429 |
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