CN101367020B - Double-layer filter material for internal combustion engine - Google Patents
Double-layer filter material for internal combustion engine Download PDFInfo
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- CN101367020B CN101367020B CN2008101983404A CN200810198340A CN101367020B CN 101367020 B CN101367020 B CN 101367020B CN 2008101983404 A CN2008101983404 A CN 2008101983404A CN 200810198340 A CN200810198340 A CN 200810198340A CN 101367020 B CN101367020 B CN 101367020B
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Abstract
The invention provides a double-layer filtering material for an internal combustion engine. The double-layer filtering material is provided with a coarse filtering layer and a fine filtering layer according to the direction of flow; the fine filtering layer consists of fibrillating fiber with the quality fraction between 2 to 100 percent and natural fiber with the quality fraction between 0 to 98 percent, wherein the diameter of the trunk of the fibrillating fiber is 1 to 20 microns, the length of the fibrillating fiber is 0.1 to 10 millimeters, the beating degree of the fibrillating fiber is 12 to 65 degrees SR, the diameter of the natural fine filtering layer fiber is 5 to 30 microns, and the length of the natural fine filtering layer fiber is 0.5 to 3.5 millimeters. The double-layer filtering material realizes to improve the filtering efficiency of the filtering material while keeping low filtration resistance and high capacity of holding dust.
Description
Technical field
The present invention relates to filtration art, particularly a kind of internal combustion engine double medium filtration material.
Background technology
Internal combustion engine is used for the filtration of the required various fluids of internal combustion engine process with filtering material, and air filtration, the machine oil that mainly comprises internal combustion engine filters and fuel oil filters.When keeping low filtration resistance, can have the ideal characterisitics that high dust containing capacity and filtration efficiency are this class materials.
For the filtering material of macroscopical homogeneous texture, in order to make its characteristic with low filtration resistance and high dust containing capacity, the fiber that needs to adopt the thicker fiber of diameter or have crimpness improves the bulk of material, but this can cause the decline of filter efficiency.On the other hand, have the characteristic of filtration efficiency in order to make filtering material, need to adopt the thinner fiber of diameter to improve the interior fiber filling rate of unit volume, reduce the pore-size between the fiber, filtration resistance raises, dust containing capacity descends but this can cause again.As seen, for the filtering material of macroscopical homogeneous, the method that the fibrous raw material diameter is regulated in simple dependence can't obtain the balance between the above performance.
Based on above reason, U.S. Pat 4661255 and Japan Patent 05-049825 have proposed the double medium filtration material from the angle of material structure.This filtering material can make it keep low filtration resistance by improving the become a mandarin bulk of surface layer of filtering material, improves dust containing capacity; Also can improve filter efficiency simultaneously by the fiber filling rate that the raising filtering material goes out in the stream interface layer unit volume.
U.S. Pat 4661255 disclosed internal combustion engines are made up of two major parts with filtering material, and a part is the surface layer that becomes a mandarin, i.e. the coarse filtration layer; A part is the stream interface layer, i.e. the fine filtering layer.Wherein the coarse filtration layer is made up of the differentiation synthetic fibers and the natural fiber in X, Y, V-type cross section; The fine filtering layer is that circular synthetic fibers and natural fiber formed by the cross section equally.This filtering material improves surperficial bulk by the differentiation synthetic fibers that contain X, Y, V-type cross section in the coarse filtration layer, thereby improves the dust containing capacity of material; Be that the string of 7～12 μ m improves filter efficiency by in the fine filtering layer, selecting diameter for use simultaneously.But because the fibre diameter minimum in its fine filtering layer is 7 μ m, this makes that the filter efficiency of this filtering material is limited.
Japan Patent 05-049825 disclosed filtering material can comprise double-layer structure, and each layer structure has the different hole of diameter.Wherein the maximum diameter of hole of coarse filtration layer is 30～150 μ m, and average pore size is 20～60 μ m; The maximum diameter of hole of fine filtering layer is 10～35 μ m, and average pore size is 5～20 μ m.Its coarse filtration layer is made of crimped fibre with irregular section and viscose fibre.But because the average pore size in its fine filtering layer is not less than 5 μ m, this makes that the filter efficiency of this filtering material is limited.
Summary of the invention
The objective of the invention is to overcome the shortcoming that prior art exists, a kind of internal combustion engine double medium filtration material that can improve filter efficiency when keeping low filtration resistance and high dust containing capacity is provided.
Purpose of the present invention is achieved through the following technical solutions: a kind of internal combustion engine double medium filtration material, press fluid flow direction, and the double-decker of filtering material sets gradually and is coarse filtration layer and fine filtering layer; Described fine filtering layer is that 2～100% fibrillating fibre and mass fraction are that 0～98% fine filtering layer natural fiber formed by mass fraction.
The fiber trunk diameter of described fibrillating fibre is 1～20 μ m, and length is 0.1～10mm, and beating degree is 12～65 ° of SR; Described fine filtering layer natural fiber diameter is 5～30 μ m, and length is 0.5～3.5mm.
Described fibrillating fibre is one or more in tencel fiber, richcel fiber and the acrylic fiber of fibrillation.
Described coarse filtration layer is made up of synthetic fibers and coarse filtration layer natural fiber.
The tightness degree longshore current body flow direction of described each layer of filtering material structure improves gradually.
The mass ratio of the quality of described coarse filtration layer and fine filtering layer is 1:5～5:1.
Described fine filtering layer natural fiber, coarse filtration layer natural fiber all are one or more in lumber fibre, grass fiber, cotton fiber, flaxen fiber and the mercerization string.
A kind of internal combustion engine of the present invention double medium filtration material, its working mechanism is: internal combustion engine is determined by the fiber filling rate in its fine filtering layer unit volume with the filter efficiency of filtering material, fiber filling rate in the fine filtering layer unit volume is high more, and interfibrous space is more little, and filter efficiency is also just high more; Fine filtering layer of the present invention is made up of fibrillating fibre and the thinner natural fiber of diameter, since the fibrillating fibre surface have with respect to trunk thin many fibril and fibril bundles, these fibrils and fibril Shu Youxiao have improved the fiber filling rate in the unit volume, have therefore also just improved the filter efficiency of filtering material.
The present invention has following advantage and effect with respect to prior art:
1, fine filtering layer of the present invention selects for use the thinner natural fiber of fibrillating fibre and diameter to form and since fibrillating fibre have with respect to trunk thin many fibrils, thereby realized when keeping low filtration resistance and high dust containing capacity, effectively improving filter efficiency.
2, process adjustments means of the present invention are flexible, the Properties Control scope is wider, and can be used for the filtration of various fluids required in the internal combustion engine process, comprise air filtration, machine oil filtration, fuel oil filtration etc.
Description of drawings
Fig. 1 is the structural representation of internal combustion engine of the present invention with the double medium filtration material; Wherein 1 is fluid flow direction, and 2 is the coarse filtration layer, and 3 is the fine filtering layer, and 4 is fibrillating fibre.
Fig. 2 is the Electronic Speculum figure of the fibrillating fibre of fine filtering layer employing of the present invention.
The specific embodiment
The present invention is further detailed explanation below in conjunction with embodiment and accompanying drawing, but embodiments of the present invention are not limited thereto.
In following examples and Comparative Examples, when the fibre section is not circle, with the maximal projection width means fibre diameter of this fiber.Use therein synthetic fibers are one or more in nylon fiber, polyster fibre, polypropylene fiber, aramid fiber, acrylic fiber, polytetrafluoroethylene fibre, vinal, tencel fiber, the richcel fiber.
The structure of internal combustion engine usefulness double medium filtration material is set to coarse filtration layer 2 and fine filtering layer 3 according to fluid flow direction 1 as shown in Figure 1.
Fine filtering layer 3 respectively is that 50% fibrillating fibre 4 and fine filtering layer natural fiber are formed by mass fraction; Wherein the fiber trunk average diameter of fibrillating fibre 4 is 12 μ m, and average length is 6mm, and beating degree is 30 ° of SR; Fine filtering layer natural fiber average diameter is 6 μ m, and average length is 1mm.
Wherein, fibrillating fibre 4 is the mixture of tencel fiber, richcel fiber and the acrylic fiber of fibrillation, and its structure is shown in the Electronic Speculum figure of Fig. 2; Coarse filtration layer natural fiber is lumber fibre; Fine filtering layer natural fiber is the mixture of lumber fibre and grass fiber.
The structure of internal combustion engine usefulness double medium filtration material is set to coarse filtration layer 2 and fine filtering layer 3 according to fluid flow direction 1 as shown in Figure 1.
Fine filtering layer 3 is that 5% fibrillating fibre 4 and mass fraction are that 95% fine filtering layer natural fiber formed by mass fraction; Wherein the fiber trunk average diameter of fibrillating fibre 4 is 18 μ m, and average length is 9mm, and beating degree is 15 ° of SR; Fine filtering layer natural fiber average diameter is 25 μ m, and average length is 3mm.
Wherein, fibrillating fibre 4 is the mixture of tencel fiber, richcel fiber and the acrylic fiber of fibrillation, and its structure is shown in the Electronic Speculum figure of Fig. 2; Coarse filtration layer natural fiber is cotton fiber; Fine filtering layer natural fiber is flaxen fiber.
Embodiment 3, are used for the double medium filtration material that fuel of internal combustion engine filters
The structure of internal combustion engine usefulness double medium filtration material is set to coarse filtration layer 2 and fine filtering layer 3 according to fluid flow direction 1 as shown in Figure 1.
Fine filtering layer 3 is made up of 100% fibrillating fibre 4, and its trunk average diameter is 3 μ m, and average length is 1mm, and beating degree is 60 ° of SR.
Wherein fibrillating fibre 4 is the tencel fiber of fibrillation and the mixture of richcel fiber.Coarse filtration layer natural fiber is the mercerization string, and synthetic fibers are polypropylene fiber.The fine filtering layer is made up of the tencel fiber and the richcel fiber of fibrillation fully.
Comparative Examples 1 is used for the double medium filtration material that combustion air filters
This Comparative Examples compares with embodiment 1, and difference is that its fine filtering layer is made up of 100% fine filtering layer natural fiber, and its average fibre diameter is 12 μ m, and average length is 3.5mm.All the other are identical with embodiment 1.
Comparative Examples 2 is used for the double medium filtration material that I. C. engine oil filters
This Comparative Examples and embodiment 2 relatively, difference is, its fine filtering layer is that 5% synthetic fibers and mass fraction are that 95% fine filtering layer natural fiber formed by mass fraction; Wherein the average fibre diameter of synthetic fibers is 20 μ m, and average length is 6.5mm; Fine filtering layer natural fiber average diameter is 20 μ m, and average length is 2mm.All the other are identical with embodiment 2.
Comparative Examples 3 is used for the double medium filtration material that fuel of internal combustion engine filters
This comparative example and embodiment 3 relatively, difference is, its fine filtering layer is that 5% synthetic fibers and mass fraction are that 95% fine filtering layer natural fiber formed by mass fraction; Wherein the average fibre diameter of synthetic fibers is 6 μ m, and average length is 3mm; The average fibre diameter of fine filtering layer natural fiber is 15 μ m, and average length is 1mm.All the other are identical with embodiment 3.
Filtering material to above each embodiment and Comparative Examples carries out the strainability test, and its test result is as shown in the table:
| |
|
Embodiment 3 | Comparative Examples 1 | Comparative Examples 2 | Comparative Examples 3 | |
| Thickness (mm) | 0.82 | 0.93 | 0.80 | 0.83 | 0.95 | 0.79 |
| Fine filtering layer maximum diameter of hole (μ m) | 32.0 | 52.9 | 14.6 | 35.6 | 61.2 | 17.9 |
| Fine filtering layer average pore size (μ m) | 11.5 | 22.3 | 4.2 | 15.9 | 25.7 | 5.4 |
| Initial pressure loss (Pa) | 613 | 306 | 1315 | 587 | 280 | 1402 |
| Dust containing capacity (g/m 2) | 394 | 156 | 126 | 385 | 145 | 115 |
| Filter efficiency (%) | 99.9 | 94.3 | 99.99 | 99.6 | 90.1 | 99.97 |
| Purposes | Air filtration | Machine oil filters | Fuel oil filters | Air filtration | Machine oil filters | Fuel oil filters |
The strainability test result of relatively above each embodiment and corresponding Comparative Examples thereof, discovery is under same use, the thickness of each embodiment filtering material, initial pressure loss, dust containing capacity Comparative Examples corresponding with it are more or less the same, but fine filtering layer maximum diameter of hole, average pore size are all less than its corresponding Comparative Examples, and filter efficiency also obviously is better than Comparative Examples.This has illustrated that internal combustion engine of the present invention is keeping having the performance of filtration efficiency than when hanging down filtration resistance and high dust containing capacity with the double medium filtration material.
Above result also shows, because its fine filtering layer does not contain the natural fiber that fibrillating fibre and diameter are lower than 7 μ m, it is not high to cause its filter efficiency to compare with embodiment 1 in the Comparative Examples 1; Owing to do not contain fibrillating fibre, cause its average pore size to be not less than 5 μ m in the Comparative Examples 3.
The foregoing description is a preferred implementation of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under spiritual essence of the present invention and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (6)
1. an internal combustion engine double medium filtration material is pressed fluid flow direction, and its double-decker sets gradually and is coarse filtration layer and fine filtering layer; It is characterized in that described fine filtering layer is that 2～100% fibrillating fibre and mass fraction are that 0～98% fine filtering layer natural fiber formed by mass fraction; The fiber trunk diameter of described fibrillating fibre is 1～20 μ m, and length is 0.1～10mm, and beating degree is 12～65 ° of SR; Described fine filtering layer natural fiber diameter is 5～30 μ m, and length is 0.5～3.5mm.
2. internal combustion engine double medium filtration material according to claim 1 is characterized in that, described fibrillating fibre is one or more in tencel fiber, richcel fiber and the acrylic fiber of fibrillation.
3. internal combustion engine double medium filtration material according to claim 1 is characterized in that, described coarse filtration layer is made up of synthetic fibers and coarse filtration layer natural fiber.
4. internal combustion engine double medium filtration material according to claim 1 is characterized in that, the tightness degree longshore current body flow direction of described each layer of filtering material structure improves gradually.
5. internal combustion engine double medium filtration material according to claim 1 is characterized in that the mass ratio of described coarse filtration layer and fine filtering layer is 1: 5～5: 1.
6. internal combustion engine double medium filtration material according to claim 1 or 5, it is characterized in that described fine filtering layer natural fiber and coarse filtration layer natural fiber are one or more in lumber fibre, grass fiber, cotton fiber, flaxen fiber and the mercerization string.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101983404A CN101367020B (en) | 2008-09-05 | 2008-09-05 | Double-layer filter material for internal combustion engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101983404A CN101367020B (en) | 2008-09-05 | 2008-09-05 | Double-layer filter material for internal combustion engine |
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| CN101367020A CN101367020A (en) | 2009-02-18 |
| CN101367020B true CN101367020B (en) | 2011-01-19 |
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Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4849160B2 (en) * | 2009-08-26 | 2012-01-11 | 株式会社デンソー | Filter media for fuel filters |
| CN103374817B (en) * | 2012-04-13 | 2015-05-20 | 上海拜邦材料科技有限公司 | Short fiber with microfiber structure, filter felt, and manufacturing method of filter felt |
| WO2013159298A1 (en) * | 2012-04-25 | 2013-10-31 | 广州华创化工材料科技开发有限公司 | Self-cleaning air filtering material and preparation method therefor |
| CN102641625B (en) * | 2012-04-25 | 2014-12-24 | 广州华创化工材料科技开发有限公司 | Self-cleaning type air filtering material and preparation method thereof |
| CN104121121B (en) * | 2014-08-12 | 2018-11-16 | 沃卡瑞（天津）贸易有限公司 | Air filter for automobile, filter core and the automobile |
| CN106120467A (en) * | 2016-06-29 | 2016-11-16 | 杭州特种纸业有限公司 | Super snail qualitative filter paper and preparation method thereof |
| CN105970738A (en) * | 2016-06-29 | 2016-09-28 | 杭州特种纸业有限公司 | Medium-speed qualitative filter paper and preparation method thereof |
| CN106149472A (en) * | 2016-06-29 | 2016-11-23 | 杭州特种纸业有限公司 | fast qualitative filter paper and preparation method thereof |
| CN105970737A (en) * | 2016-06-29 | 2016-09-28 | 杭州特种纸业有限公司 | Rapid qualitative filter paper and preparation method thereof |
| CN106120465A (en) * | 2016-06-29 | 2016-11-16 | 杭州特种纸业有限公司 | Qualitative filter paper and preparation method thereof at a slow speed |
| CN107061070A (en) * | 2017-02-26 | 2017-08-18 | 郭绍华 | Engine hollow-fibre membrane air cleaner cartridge |
| CN107433072A (en) * | 2017-07-07 | 2017-12-05 | 杭州市水文水资源监测总站 | It is a kind of to be used to handle compound air filter element of surface water quality detection waste gas and preparation method thereof |
| CN113509800B (en) * | 2020-04-10 | 2022-09-30 | 中国科学技术大学 | Multi-scale structure plant fiber air filtering material and preparation method and application thereof |
| CN111980833A (en) * | 2020-08-12 | 2020-11-24 | 内蒙古第一机械集团股份有限公司 | Three-layer composite filter material for high-power internal combustion engine |
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Application publication date: 20090218 Assignee: Guangzhou Yuan Jian special material science and Technology Development Co Ltd Assignor: South China University of Technology Contract record no.: 2013440000007 Denomination of invention: Double-layer filter material for internal combustion engine Granted publication date: 20110119 License type: Exclusive License Record date: 20130107 |
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