CN104791159B - Multi-stage spiral tubular type engineering machinery air cleaner - Google Patents
Multi-stage spiral tubular type engineering machinery air cleaner Download PDFInfo
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- CN104791159B CN104791159B CN201510113868.7A CN201510113868A CN104791159B CN 104791159 B CN104791159 B CN 104791159B CN 201510113868 A CN201510113868 A CN 201510113868A CN 104791159 B CN104791159 B CN 104791159B
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Abstract
The present invention discloses a kind of Multi-stage spiral tubular type engineering machinery air cleaner, cleaner determines cleaner series by engineering machinery engine air inflow and intake efficiency, every grade of cleaner is made up of skeleton and filter material, filter material porosity successively reduces from inside to outside, is successively filtered from bulky grain to little particle with realizing；The filter material is made up of base layer, damping layer and superficial layer, realizes the energy dissipation under wide frequency domain random vibration and impact shock；The cleaner is reduction induction noise, air inlet is connected with silencer, and cleaner air inlet uses dichotomous pipeline, noise automatic adjusument of the pipeline enclosure away from the hair that become rusty according to muffler outlet piper air velocity, so, engineering machinery engine big flow, high-speed air filtering Noise measarement are realized.
Description
Technical field
The present invention relates to air purifier unit, more particularly to a kind of Multi-stage spiral tubular type engineering machinery air filtration to fill
Put, there is big flow, high speed and low noise.
Background technology
Air cleaner is one of very important auxiliary products of engineering machinery engine, and it, which is protected, starts function to filter out sky
Hard dust particles in gas, clean air is provided to engine, prevents dust from causing engine scuffing, to the reliable of engine
Property and durability play a crucial role.Investigation is shown under identical use condition, and to the engine without air cleaner, it is lived
The wear extent of plug, cylinder and piston ring is have air cleaner 4~10 times, thus it is to prevent dust from grinding to install air cleaner
Damage an effective measures of engine.Engineering machinery engine earlier period damage 70% is relevant with air cleaner according to statistics, therefore
Air has to pass through strict filtering before engine is entered.
Engineering machinery often works under the very high adverse circumstances of dust content of air, to air cleaner effect and air inlet system
The sealing of system is proposed very high request.In recent years, the Key Common Technologies faced in cleaner New Product Development are asked
Topic is concentrated mainly on the influence of the abrasion and performance of filtering accuracy, filter efficiency, intake resistance to engine and seeks air inlet
In the optimization of system sound performance, research and development focus is focused primarily upon to high accuracy, long-life, environment-friendly type air cleaner product
And the research and development ability of system module improves.
From the point of view of reducing engine scuffing, improving service life, air cleaner filter dirt ability should be more strong better,
But the resistance of air cleaner can so increased, it is seen that both are mutually to restrict, be conflicting, it is therefore desirable to are considered
Above-mentioned requirements, properly settle the contradiction between them.In addition, when air-flow passes through filter core, pressure loss meeting caused by intake resistance
Influence the dynamic property and economy of engine.Therefore, the VELOCITY DISTRIBUTION inhomogeneities of air cleaner internal gas flow how is reduced
With reduce by the pressure loss of filter core, be air filtering device structure remodeling and optimization design key, and present air filter
Clear device properties of product upgrading key technology research hot issue.
Air cleaner is one of indispensable self-protection device of engineering machinery high-power engine, mainly single by filtering
Member, air filter body and air filter lid composition.The filter material of air cleaner is good sound-absorbing porous material.For acoustically,
An air cleaner inherently intake muffler.The more methods by means of experiment of the conventional research of air cleaner, typically
Only pay attention to the function of its filtering air inlet, only study its flow resistance, filtering efficiency and the relation between the life-span, the noise elimination not to it is made
With in theory with inquired on construction practices, cause the noise elimination function of air cleaner not utilized reasonably.
For the less demanding common vehicle of noise objective, loading onto air cleaner can meet at present to Noise measarement
It is required that.For miniature high-speed machine, supercharged diesel engine and high-grade car engine, it may be considered that dress air cleaner and air inlet disappear
The composite muffler that sound device is integrated.Generally intake muffler is combined with air cleaner, according to induction noise
Spectral characteristic is designed.Filter paper in air filter is good sound-absorbing material in itself, can effectively reduce high-frequency noises.To disappear
Except low frequency noise component, also need to set up resonant cavity sometimes.Deng Zhaoxiang etc. is eliminated the noise to engine charge and studied, according to resonance
Type Helmholtz's silencer principle devises three chamber parallel connection collateral branch type intake mufflers, and noise emitted by accelerating motor vehicle is carried out applied to real vehicle
Experiment, achieves good soundproof effect, but its silencer is to be independently arranged with cleaner, complicated, engineering popularization and application
It is difficult.
The content of the invention
It is an object of the invention to provide a kind of Multi-stage spiral tubular type engineering machinery air cleaner, has big flow, height
The features such as speed and low noise.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of Multi-stage spiral tubular type engineering machinery air cleaner, including Multi-stage spiral pipe air noise cancellation apparatus, multistage mistake
Filter and filter lower end cover.Backflow admission line and outlet pipe are set in Multi-stage spiral pipe air noise cancellation apparatus, axle is presented
It is arranged symmetrically, the length of backflow admission line and outlet pipe is calculated according to the noise signal numerical value such as air inlet frequency, sound intensity
It is determined that the outlet pipe thickness of pipe about 1.5mm, backflow admission line is connected with outlet pipe by three-way interface, and pipeline enclosure is filled with
One or more porous class materials such as sponge strip, foamed plastics and industrial felt, to increase the damping characteristic of structure, and are improved more
Level cyclone pipe air noise cancellation apparatus acoustic absorptivity and widen its sound sucting band.Multistage filter enters according to engineering machinery engine
Tolerance and intake efficiency determine cleaner series, and every grade of cleaner is made up of skeleton and filter material, from inside to outside filter material porosity by
Layer reduces, and is successively filtered from bulky grain to little particle with realizing；The filter material is made up of base layer, damping layer and superficial layer, real
Energy dissipation under existing wide frequency domain random vibration and impact shock, damping layer material is visco clastic polymer film, according to filtering
Device and engineering machinery engine vibrating numerical, determine the thickness of film, and visco clastic polymer film can be in sizable scope
The Nomenclature Composition and Structure of Complexes of interior adjustment material, to obtain the larger energy loss factor；Superficial layer is mainly improved by plastic-blasting method and filtered
Material surface quality；To reduce induction noise, air inlet is connected the cleaner with silencer, and cleaner air inlet is using dichotomous
Pipeline, noise automatic adjusument of the pipeline enclosure away from the hair that become rusty according to muffler outlet piper air velocity, so, realize that engineering machinery is sent out
Motivation big flow, high-speed air filtering Noise measarement.
The beneficial effect that the present invention realizes：
A kind of Multi-stage spiral tubular type engineering machinery air cleaner of the present invention；Wherein, Multi-stage spiral pipe air noise cancellation apparatus
With simple in construction, comprehensive bifurcated de-noising and tube turning noise reduction dual-use function, and can be wanted according to engine overall noise is horizontal
Ask, optimization design duct length, diameter and position, to realize effective control of noise and active suppression；Secondly, multistage mistake
Filter filters series according to the overall target such as engineering machinery engine air inflow and intake efficiency, air inlet precision, flexibly setting, by
Coarse filtration, intermediate filtered arrive thin filtering again, successively filter, filtered juice porosity exponentially reduces, and avoids conventional air filter
The defects of device filtering accuracy and filter efficiency are low, filter element life is short, and between initial filter device, intermediate filtered device and fine filtering device
Internal die cavity is provided with, optimization design planform effectively reduces pneumatic noise.
The present invention is realized under engineering machinery engine big flow, the adverse circumstances of high flow rate to air cleaner noise reduction mistake
Performance requirement is filtered, is risen to lifting the integral level of air cleaner industry and the development of energy-saving, environmental protection etc.
To great impetus.
Compared with prior art, the present invention has advantages below：
1st, the present invention utilizes multiple physical field coupled wave theory, integrating materials science, CAD/CAM, filtration theory and technology, sound and vibration
Theoretical and technology of numerical simulation, it is proposed that air cleaner multistage multilayer filtration theory technology, based on the technology, during folded filter paper
It is divided into three layers, for adjacent short long side through statistic op- timization and combined process, its ratio is golden section location point；Meanwhile according to starting
Acc power size and feed rate, air cleaner intermediate layer series is determined, realizes air cleaner filtering accuracy and filter core longevity
Life etc. combination property demand, successively filtered, filtered juice porosity is in again to carefully filtering by coarse filtration, intermediate filtered in technique
Existing exponential reduction, realizes the modularized design of filter element, accepts or rejects on demand, flexibility and changeability, and interchangeability is strong；
2nd, the present invention realizes two kinds of functions of dual de-noising and air filtration of air cleaner charge air flow with reference to compound.
Charge air flow carries out noise suppressed by Multi-stage spiral pipe air noise cancellation apparatus first, and Multi-stage spiral pipe air noise cancellation apparatus passes through
Tube furcation, stream pressure noise is reduced, while eliminated the noise by multi-stage pipeline, flowed back and filled between admission line and outlet pipe
There is the porous class material such as sponge strip, foamed plastics, industrial felt, to increase the damping characteristic of structure, and improve Multi-stage spiral pipe
The acoustic absorptivity of air noise cancellation apparatus and widen its sound sucting band, while two problems of low-frequency vibration and noise in solving；It is multistage
Rotational flow pipe type engineering machinery air purifier unit realizes process innovation, optimizes traditional air filtering device structure, realizes
Air cleaner integrates with intake muffler structure composite with function；
3rd, Multi-stage spiral tubular type engineering machinery air purifier unit of the invention, mainly at a high speed, heavy duty and severe
Engineering machinery engine energy-saving environmental protection is combined with CFD software to Multi-stage spiral tubular type work to the demand of air-filtering under environment
The three-dimensional simulation of journey mechanical air cleaner air flow calculates, and analysis determines air cleaner air inlet position, diameter and shape
And gas outlet position, diameter and shape, while cavity geometry between coarse filtration, intermediate filtered and thin filter layer is determined, it is more
Layer filtering interlayer cavity realizes high frequency de-noising and impulsive noise control.
Brief description of the drawings
Fig. 1 is a kind of structural representation of Multi-stage spiral tubular type engineering machinery special-purpose air cleaner；
Fig. 2 is the structural representation of Fig. 1 Multi-stage spiral pipe air noise cancellation apparatus；
Fig. 3 is the structural representation of multistage filter；
Fig. 4 is the principle schematic of multistage multilayer filter paper；
Fig. 5 is the structural representation of the embodiment of multistage multilayer folded filter paper one.
Embodiment
Technical scheme described in detail below.The embodiment of the present invention is only for explanation concrete structure, the rule of the structure
Mould should not be limited by the examples.
Refer to Fig. 1 and Fig. 2, a kind of Multi-stage spiral tubular type engineering machinery special-purpose air cleaner of the invention, including it is more
Level cyclone pipe air noise cancellation apparatus 1, multistage filter 2 and filter lower end cover 7.Multi-stage spiral pipe air noise cancellation apparatus 1, it is
Cylindrical structural, including the first backflow backflow admission line 102 of admission line 101, second are arranged at the first outlet pipe 103
Left half-plane, it is flat that the 3rd backflow backflow outlet pipe 106 of admission line 105 and second of admission line the 104, the 4th is arranged at right half
Face, for eliminating the outside high-frequency noises flowed into air.First outlet pipe 103 is located at the first backflow admission line 101
And second backflow admission line 102 between, the second outlet pipe 106 located at the 3rd backflow admission line 104 and the 4th flow back into
Between feed channel 105.Admission line radius is 1/2 times of outlet pipe radius.
As shown in figure 1, multistage filter 2 includes initial filter device 3, intermediate filtered device 5, the and of fine filtering device 4 from left to right
Erection support frame assembly 6, wherein intermediate filtered device 5 are as needed, and settable intermediate filter layer 501,502 ... is waited (referring to figure
3).Erection support frame assembly 6 is used to fix Multi-stage spiral pipe air noise cancellation apparatus 1 and multistage filter 2, and for connecting filtering
Device bottom end cover 7.
Refer to Fig. 2 and combine Fig. 1, the backflow admission line 101,102,104,105 of Multi-stage spiral pipe air noise cancellation apparatus 1
Axial symmetry arrangement is presented with outlet pipe 103,106, centre is also filled with sponge strip, foamed plastics (such as：UF foamed plastics)
With one or more porous class materials such as industrial felt, to increase the damping characteristic of structure, Multi-stage spiral pipe air de-noising is improved
The acoustic absorptivity of device and sound sucting band is broadened, while solve vibration and two problems of noise.Wherein sponge strip, foamed plastics
Backflow admission line and outlet pipe periphery are sequentially packaged in from the inside to the outside respectively with industrial felt etc..
Multi-stage spiral pipe air noise cancellation apparatus backflow admission line 101,102 and outlet pipe 103, flow back admission line
104th, 105 it is connected respectively by three-way interface with outlet pipe 106.The diameter of backflow air inlet pipe optimizes according to specific hydrodynamics
As a result, it is proportional with outlet pipe number；Air inlet pipe, the length of escape pipe flow back according to air velocity, engine power
And air draught noise size determines.Backflow air inlet pipe, escape pipe axisymmetricly arrange that spacing is according to noise size and fluid
Mechanics optimization result dynamic is adjusted.
Refer to Fig. 3 and combine Fig. 1 and Fig. 2, multistage filter 2 is empty by sealing ring 8, upper end cover 9 and Multi-stage spiral pipe
The outlet pipe 103,106 of gas noise cancellation apparatus 1 connects, and multistage filter successively put in order according to from bulky grain to little particle
Filter, initial filter device 3, intermediate filtered device 5 and fine filtering device 4 are arranged from left to right.Intermediate filtered device includes intermediate filtered
Layer 501,502 ..., the specific number of plies that filters are set according to air filtration accuracy class and filtration resistance optimised.Initial filter device 3,
Intermediate filtered device 5 and fine filtering device 4 form by skeleton 10 and filter material 11, and its middle skeleton 10 is a cylinder, wall thickness
1mm, erection support frame assembly 6 is connected to by riveting method；Filter material 11 is fixed on skeleton inner cylinder face by roll-in.Initial filter fills
The porosity of filter core filter material 11 of 3, intermediate filtered device 5 (intermediate filter layer 501,502 ...) and fine filtering device 4 is put according to successively
Reduce, decay according to exponential series form, realize and successively filtered from bulky grain to little particle.
Shown in Fig. 4, filter material 11 is made up of base layer 1101, damping layer 1102, superficial layer 1103 and filter core 12, wherein base
The material of body layer 1101 is stainless steel；The material of damping layer 1102 is visco clastic polymer film, is sent out according to cleaner and engineering machinery
Motivation vibrating numerical, determines the thickness of film, and visco clastic polymer film is made up of mixing particle diameter ferromagnetic particle and fibrous material
Basic filter unit；Superficial layer 1103 mainly improves surface of filter medium quality by plastic-blasting method.The initial filter device of multistage filter 2
3rd, when intermediate filtered device 5 and fine filtering device 4 make, damping layer 1102 is compound in base layer 1101, combination process first
By way of electrostatic, roller coat, thickness is 10 μm；Secondly, the technique by superficial layer 1103 by spraying, spray layer thickness control
For 2 μm；The folded filter paper of filter core 12 is three layers of flanging, wherein short flanging point position be long side golden section point position (referring to
Fig. 5).
Refering to Fig. 3 and Fig. 1, Fig. 2 are combined, erection support frame assembly 6 is fixed with filter lower end cover 7 by riveting method to be joined
Connect, the fine filtering device 4 of the multistage filter 2 is connected by sealing ring with outside with device of air.
Admission line diameter, the specific calculation procedure of length of flowing back are as follows：
The first step：Calculated by such as following formula I and determine backflow admission line diameter, flow back admission line diameter computational mathematics model
It is：
In above-mentioned Formulas I, QEnterFor outside device of air air inlet mass flow, η is that Multi-stage spiral tubular type engineering machinery is empty
Air cleaner efficiency, u are average flow velocity of the air draught in pipe, and ρ is the density of air under normal running conditions；
Second step：Calculated by such as Formula Il and determine backflow admission line length L,
L=(10~30) d Formula II
In above-mentioned Formula II, d is backflow admission line diameter.
Alternatively, in order to realize effective control to admission line noise, connect in backflow air inlet pipe and outlet pipe U-tube
Meet place and loudspeaker is set, flow back into setting sonic sensor at air pipe inlet, connect phase inverter and power amplifier, driving are raised one's voice
Device sends sound wave, eliminates duct noise.If loudspeaker can not effective control pipeline noise, using signal processor, to air inlet
Pipe position acoustic wave sensor signal carries out spectrum analysis；In the case where spectrum analysis can not reflect duct noise information, signal
Processor further carries out wavelet analysis to the noise information of sonic sensor transmission, and then sends drive signal so that raises one's voice
Device produces controllable sound and suppresses signal.
The multi-stage air cleaner of coarse filtration, intermediate filtered and thin filter layer composition, Specifeca tion speeification calculation procedure
It is as follows：
The first step：Calculated by following formula III and determine total filter efficiency.Always filter efficiency computational mathematics model is：
In above-mentioned formula III, fsFor the specific surface area of multi-stage air cleaner, ηSlightlyFor multi-stage air cleaner coarse filtration layer mistake
Filter efficiency, ηInFor multi-stage air cleaner intermediate filter layer filter efficiency, ηCarefullyFor the thin filter layer filtering effect of multi-stage air cleaner
Rate, d are each filter layer distance of multi-stage air cleaner, and n is that multi-stage air cleaner filters the number of plies, ηnFor multi-stage air cleaner
Total filter efficiency；
Second step：The air-pressure drop for determining multi-stage air cleaner, air-pressure drop computational mathematics mould are calculated by following formula IV
Type is：
In above-mentioned formula IV, Δ P is the air-pressure drop of multi-stage air cleaner, and μ is air coefficient of viscosity, dHFor coarse filtration,
Intermediate filtered and thin filter layer filter paper thickness, fsFor the specific surface area of multi-stage air cleaner, ρ is atmospheric density, and u is air-flow
Flowing velocity, g are acceleration of gravity.
In summary, the present invention passes through Multi-stage spiral pipe air noise cancellation apparatus bifurcated de-noising and the dual work(of tube turning noise reduction
Can, with reference to the optimization design of duct length, diameter and position, realize effective control and the active suppression of induction noise；So
Afterwards, multistage filter flexibly sets filtering series, by thick mistake according to the overall target such as air inflow and intake efficiency, air inlet precision
Thin filtering is arrived in filter, intermediate filtered again, is successively filtered, filtered juice porosity exponentially reduces, and avoids conventional air filter mistake
Filter the defects of precision and filter efficiency are low, filter element life is short, multistage filter coarse filtration layer, intermediate filter layer and thin filter layer
Filter paper effectively reduces air-flow high-frequency noises while filtered airflow.In addition, multistage filter coarse filtration layer, intermediate filtered
Layer and thin filtering interlayer are provided with internal die cavity, low frequency pneumatic noise during optimization design planform effectively reduces, Jin Ershi
The integration filter of vibration damping, de-noising and air is showed.
Invention additionally discloses a kind of Multi-stage spiral tubular type engineering machinery air cleaner backflow admission line diameter, length tool
Body computational methods and a kind of Specifeca tion speeification computation model of Multi-stage spiral tubular type engineering machinery air cleaner.
The present embodiment is directed to the continuous improvement of engineering machinery engine air cleaner extreme environment performance requirement, passes through
Assembly Multi-stage spiral pipe air noise cancellation apparatus and multistage filter, realize induction noise and the overall-in-one control schema of filtering.Multistage rotation
Drift tube type engineering machinery air cleaner possesses the advantages of simple for structure, easy adjustment control, Real-time Feedback regulation, overcomes tradition
The shortcomings of engineering machinery engine air cleaner filter efficiency is low, filtering accuracy is poor, noise (particularly low-frequency noise) is big.
Claims (13)
- A kind of 1. Multi-stage spiral tubular type engineering machinery air cleaner, it is characterised in that：IncludingMulti-stage spiral pipe air noise cancellation apparatus (1), for eliminating induction noise；It is total that multistage filter (2) includes an initial filter device (3), intermediate filtered device (5), fine filtering device (4) and erection support frame Into (6)；The erection support frame assembly (6) is used to fix the Multi-stage spiral pipe air noise cancellation apparatus (1) and multistage filter (2), and for connecting filter lower end cover (7)；The multistage filter (2) is connected by the erection support frame assembly (6) with engine intake, for for engineering machine The air of filtering accuracy requirement needed for the offer of tool engine；The Multi-stage spiral pipe air noise cancellation apparatus (1) passes through sealing ring with multistage filter (2) component units initial filter device (3) Connection；Multi-stage spiral pipe air noise cancellation apparatus (1) is cylindrical structural, and it is internally provided with the backflow air inlet pipe of connection silencer Road first backflow admission line (101), second backflow admission line (102), the 3rd backflow admission line (104), the 4th time Flow into feed channel (105), the first outlet pipe (103) and the second outlet pipe (106)；First backflow admission line (101), the second backflow admission line (102) and the first outlet pipe (103) are arranged at left half Plane, the 3rd backflow admission line (104), the 4th backflow admission line (105) and the second outlet pipe (106) are arranged at right half Plane；Admission line diameter, the specific calculation procedure of length of flowing back are as follows：The first step：Calculated by such as following formula I and determine backflow admission line diameter, backflow admission line diameter computational mathematics model is：In above-mentioned Formulas I, QEnterFor outside device of air air inlet mass flow, η is Multi-stage spiral tubular type engineering machinery air filter Clear device efficiency, u are average flow velocity of the air draught in pipe, and ρ is the density of air under normal running conditions；Second step：Calculated by such as Formula Il and determine backflow admission line length L,L=(10~30) d Formula IIIn above-mentioned Formula II, d is backflow admission line diameter.
- 2. Multi-stage spiral tubular type engineering machinery air cleaner as claimed in claim 1, it is characterised in that：First outlet pipe (103) between the first backflow admission line (101) and the second backflow admission line (102), axisymmetricly it is distributed, Ge Gejin Feed channel radius is 1/2 times of outlet pipe radius.
- 3. Multi-stage spiral tubular type engineering machinery air cleaner as claimed in claim 1, it is characterised in that：Second outlet pipe (106) between the 3rd backflow admission line (104) and the 4th backflow admission line (105), axisymmetricly it is distributed, Ge Gejin Feed channel radius is 1/2 times of outlet pipe radius.
- 4. Multi-stage spiral tubular type engineering machinery air cleaner as claimed in claim 1, it is characterised in that：First backflow air inlet Pipeline (101), second backflow admission line (102), the 3rd backflow admission line (104), the 4th backflow admission line (105), First outlet pipe (103) and the second outlet pipe (106) thickness of pipe about 1.5mm.
- 5. Multi-stage spiral tubular type engineering machinery air cleaner as claimed in claim 1, it is characterised in that：First outlet pipe (103) it is connected with the first backflow admission line (101) and the second backflow admission line (102) by three-way piece.
- 6. Multi-stage spiral tubular type engineering machinery air cleaner as claimed in claim 1, it is characterised in that：Second outlet pipe (106) it is connected with the 3rd backflow admission line (104) and the 4th backflow admission line (105) by three-way piece.
- 7. Multi-stage spiral tubular type engineering machinery air cleaner as claimed in claim 1, it is characterised in that：Multi-stage spiral pipe is empty Gas noise cancellation apparatus (1) is also filled with the porous class material of one or more of sponge strip, foamed plastics and industrial felt.
- 8. Multi-stage spiral tubular type engineering machinery air cleaner as claimed in claim 1, it is characterised in that：The initial filter device (3), intermediate filtered device (5) and fine filtering device (4) are successively filtered by air current flow direction.
- 9. Multi-stage spiral tubular type engineering machinery air cleaner as claimed in claim 1, it is characterised in that：The initial filter device (3), intermediate filtered device (5) and fine filtering device (4) form by skeleton and filter material, and the skeleton is a cylinder, wall thickness 1mm；Skeleton circumferencial direction is provided with upper end cover, the ending cover thickness 1.5mm, is connected to Multi-stage spiral pipe air noise cancellation apparatus, To prevent gas from leaking, both ends of the surface are connected by sealing ring.
- 10. Multi-stage spiral tubular type engineering machinery air cleaner as claimed in claim 1, it is characterised in that：The initial filter dress (3), intermediate filtered device (5) and fine filtering device (4) are put, its respective filter material porosity successively reduces, according to exponential series Form decays.
- 11. Multi-stage spiral tubular type engineering machinery air cleaner as claimed in claim 1, it is characterised in that：The initial filter dress (3), intermediate filtered device (5) and fine filtering device (4) are put, its respective filter material is made up of base layer, damping layer and superficial layer, The damping layer material is visco clastic polymer film.
- 12. Multi-stage spiral tubular type engineering machinery air cleaner as claimed in claim 1, it is characterised in that：The initial filter dress (3), intermediate filtered device (5) and fine filtering device (4) are put, its respective filter material is filter paper, two layers of flanging is folded into, wherein short Flanging point position is long side golden section point position.
- 13. Multi-stage spiral tubular type engineering machinery air cleaner as claimed in claim 1, it is characterised in that：The installation branch Mounting assembly (6) is coupled with filter lower end cover (7) by sealing ring.
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| CN201510113868.7A CN104791159B (en) | 2015-03-13 | 2015-03-13 | Multi-stage spiral tubular type engineering machinery air cleaner |
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| CN114412674A (en) * | 2021-12-26 | 2022-04-29 | 盐城聚德机械零部件有限公司 | Noise reduction method for filter element of air filter |
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| JPS6189973A (en) * | 1984-10-08 | 1986-05-08 | Yamaha Motor Co Ltd | Multistage expansion type air cleaner for engine |
| DE29700579U1 (en) * | 1997-01-15 | 1997-03-13 | Mann & Hummel Filter | Arrangement for separating liquid particles from a gas stream |
| CN201021648Y (en) * | 2006-12-14 | 2008-02-13 | 比亚迪股份有限公司 | A novel impedance compound muffling system for car engine air supply system |
| CN201105195Y (en) * | 2007-09-11 | 2008-08-27 | 靳天柱 | Multilevel filtering air filtering device |
| CN101985908A (en) * | 2010-09-02 | 2011-03-16 | 太仓市联宏电塑有限公司 | Filter element of automobile air filter |
| CN203035398U (en) * | 2013-01-25 | 2013-07-03 | 励彩玲 | Multistage filter used for automobile |
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Effective date of registration: 20170930 Address after: 314001 Yuexiu South Road, Zhejiang, No. 56, No. Applicant after: Jiaxing University Address before: 314001 Zhejiang province Jiaxing City Nanhu District Jiaxing Town Industrial Park 999 Jiao Jiao Road Applicant before: Zhejiang Guenther Heidemann filtering technique Co., Ltd Applicant before: Hu Hongsheng |
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