• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Filter insert (1) for separating liquid droplets from a gas stream (G) comprising: - a media package (M) consisting of layers of filter media (2, 3 and 4), wherein in operation a gas stream (G) to be cleaned by the media package ( M), - a bottom (5) which, relative to a discharge direction of a gas stream (G) separated liquid (O), in the lower region of the filter insert (1) is arranged, wherein between the filter medium (4) for fine separation of Media package (M) and the bottom (5), or within the media package (M) extending over the radius of the filter cartridge (1) extending passage (P) for the liquid (O) is provided.
    公开号:AT516310A1
    申请号:T50644/2014
    申请日:2014-09-15
    公开日:2016-04-15
    发明作者:Günther Wall
    申请人:Ge Jenbacher Gmbh & Co Og；
    IPC主号:
    专利说明:

    The invention relates to a filter cartridge for separating liquid particles from a gas flow having the features of the preamble of claim 1, a filter device with such a filter cartridge, and an internal combustion engine therewith.
    One common task in the art is the separation of liquid droplets from a gas stream.
    The deposition devices used for this purpose are often constructed so that in a housing a mostly cylindrical filter insert (a filter cartridge) is inserted, which is flowed through radially by the gas stream to be cleaned. The flow can take place from the lateral surface inwards or vice versa. A typical filter cartridge comprises a media pack (a package of filter media) captured by mounting portions on the lid surfaces.
    The filter media used in a filter cartridge must perform two main tasks: - Separate the entrained fluid through various filter mechanisms, primarily depth filtration and coalescence - Continuously remove fluid from the filter medium to maintain low saturation of the filter media and thus low back pressure of the filter
    The common filter design is a construction of one or more different filter media, with suitable media properties such as fiber diameter, porosity, and surface energy. As a rule, the microbial deposition is arranged upstream of a fine separation in the flow direction.
    The design of a filter takes into account the requirements for separation efficiency, liquid drainage and acceptable backpressure.
    Filter media for the fine separation are required especially for high separation levels. Typically, the filter media for fine separation is characterized by a small fiber diameter and small pore size.
    The disadvantage of this is that absorbed liquid, for example oil, under normal operating conditions is not sufficiently removed from the filter medium for fine separation, whereby a high flow resistance occurs during operation.
    In order to minimize the saturation of the liquid-deposited filter media, efforts are being made to improve drainage from the filter media (micro-deposition and fine-deposition media) in the direction of gas flow.
    For example, US Pat. No. 8,499,749 B2 shows a filter for a crankcase ventilation blow-by gas in which drainage holes for the separated liquid are provided in the bottom portion of the filter cartridge. The disadvantage of this solution, however, is that inevitably a bypass of gas occurs through the drainage holes. By bypass is meant here that gas can escape through the drainage openings and thus does not flow through all the filter layers.
    It is therefore an object of the present invention to provide a filter cartridge having good liquid drainage without the disadvantages of the prior art. It is also intended to specify a filter device using such a filter element, as well as an internal combustion engine with such a filter.
    The object is achieved by a filter element with the features of claim 1 or by a filter device according to claim 12 and an internal combustion engine according to claim 15. Preferred embodiments are indicated in the dependent claims.
    Thus, by providing a passage for the liquid over the radius of the filter cartridge between the filter media for finely separating the media pack and the bottom of the filter cartridge, or within the media pack, it is achieved that the drained fluid can easily escape from the filter element.
    Passage means creating a flow path that is largely or completely free of filter media. As a result, the liquid can flow much easier and thus does not lead to the above-discussed problems with saturation of the filter media and the associated increased flow resistance of the filter cartridge.
    The phrase "extending over the radius" refers to the generally cylindrical basic shape of the filter cartridge. It is to be understood in the context of this application that the passage has a continuous flow path in the direction of the predominant liquid flow direction. Of course, the invention is also applicable to shapes other than a cylindrical shape. The passage may well have tangential directional components. The passage may be formed as a cylindrical gap space or in the form of individual channels.
    It can preferably be provided that the media package contains at least one fine filter.
    Furthermore, it can preferably be provided that the passage is largely or completely free of fine filters, since the fine filter of the liquid to be drained, which is indispensable for fine separation, opposes a particularly high flow resistance.
    It can preferably be provided that the media package has at least one capillary-effect layer.
    The particular advantage of having a layer with capillary effect is that it is gas-tight after saturation with liquid but permeable to liquid (liquid-open). Thus, the media package is largely gas-tightly sealed in those areas which are impregnated by the capillary effect of liquid. For capillary effect filter media, wettable materials are selected over the fluid, such as oil. The selection depends on the
    Surface or surface tension of the liquid relative to the filter medium.
    It has been found to be particularly favorable when the filter medium with capillary effect is tuned so that the liquid reaches therein a rise height of 2 to 10 cm, preferably 2 to 5 cm. The height of rise can easily be determined experimentally. When wetted, filter media with capillary effect form a fluid-open, d. H. from liquid, for example, oil-flowable, but customary operating conditions (for example, 20 mbar to 50 mbarFilterdifferenzdruck) largely gas-tight layer.
    Preferably, it is provided that the layer with capillary effect is formed so that it closes the media package, preferably on the inlet and outflow side of the gas, partially gas-tight. In operation, the capillary effect of the capillary effect draws liquid from the liquid collecting at the bottom, making the layer gas-tight up to the rise.
    This ensures that the media package is sealed gas-tight up to a certain fleas for the usual operating differential pressures (up to about 50 mbar, preferably to 20 mbar). The gas-tight section can not push any gas from the media pack through the passage described above without passing through the layers of the media pack intended for filtering.
    One can compare the effect to a siphon that allows the draining liquid to pass but directs the gas through the non-saturated areas of the media pack.
    The invention takes advantage of the finding that saturation of certain filter media with liquid produces a gas-tight but fluid-permeable (liquid-open) layer. Through this layer further liquid can be transported away.
    Filter media for fine separation (fine filter), however, set a very high flow resistance at saturation by liquid of the effluent liquid. Therefore, it is preferably provided that a fine filter arranged in the media package does not extend over the entire length of the
    Filter device extends, i. that the filter section for fine separation is shorter than the other filter media in the media package. By length of the filter means is meant that extent normal to the main flow direction of the gas flow.
    This results in a passage within the media pack which is free of filter media for fine separation. The passage ensures that the filter medium for fine separation remains largely unimpaired by the liquid level arising during operation.
    This is important because the filter medium for fine separation in the liquid-soaked state has a particularly high flow resistance.
    It can preferably be provided that the layer is formed with the capillary effect as a drainage material or as a deposition medium.
    It can also be provided that the filter section for fine separation in operation reaches into the resulting liquid level. The filter medium with capillary effect serves as a gas barrier and prevents the gap between filter medium for fine separation and adhesive flows through.
    The height of the passage is preferably not greater in the range between 2 to 0.5% of the height of the filter cartridge. This achieves a particularly good compromise between drainage action and separation efficiency. For common filter dimensions, in particular filter cartridges for oil mist separation in stationary engines, the passage particularly preferably has a height of 5 mm to 20 mm.
    It can preferably be provided that several layers of filter medium with capillary effect are arranged within the media package, in particular within the arrangement of filter media for fine separation, and in the flow direction of the gas before and after the arrangement of filter medium for fine separation. In other words, capillary sheets are both within the fine separation section and upstream and downstream thereof.
    Thus, the fine separation section is preferably "packed" of capillary effect layers.
    The filter insert may have different shapes: suitable is, for example, a cylindrical geometry. In this case, the layers of filter media are typically wound but may be layered. In the case of a cuboid shape, the filter layers are layered. The explanations given above for cylindrical geometries for the orientation of the passages also apply mutatis mutandis to other designs. What has been termed "radial" for a cylindrical geometry is to be replaced theoretically by "in the direction of flow" for a cuboid shape.
    The filter cartridge described is particularly suitable for separating and discharging oil droplets from an oil-mist-laden gas, such as a blow-by gas of a crankcase breather of an internal combustion engine. For this purpose, the filter cartridge is typically installed interchangeably in a filter device.
    The invention is explained in more detail below by the figures.
    Showing:
    Fig. 1 is a schematic representation of a filter cartridge in cross section
    Fig. 2 is a schematic representation of a filter cartridge in cross-section in an alternative embodiment
    Fig. 3 is a schematic representation of a filter cartridge in cross-section in another alternative embodiment. Figs. 4 is a schematic representation of a filter element FIG. Figure 5 shows the bottom of a filter element Fig. 6 an internal combustion engine with filter device
    Figure 1 shows an embodiment of a filter cartridge 1 for separating liquid suspended particles from a gas stream G, in particular for separating liquid droplets from an aerosol-carrying gas. The filter insert 1 shown in Figure 1 is cylindrical. The symmetry is through the
    Symmetry axis S marked. Therefore, only the left half of the rotationally symmetrical structure is shown in cross section.
    The arrangement shows layers with different filter media, which together form the media package M.
    The filter element 1 has the height HF.
    The gas or gas stream G first flows through the filter medium 2 in order then to flow through the fine filter 4 via a first filter layer having a capillary effect 3. In the direction of flow outside the arrangement, a layer with capillary effect 3 is again arranged, through which the now cleaned gas stream leaves the filter insert 1.
    The gas stream G flows into the filter insert 1 centrally from above. The inflowing gas flow G is first released from larger liquid droplets in the filter medium 2. Subsequently, the fine separation takes place in the fine filter 4. The gas flow G leaves the filter element 1 after passing through the last filter layer.
    Of course, in operation, the filter cartridge 1 is surrounded by a housing which allows the gas flow G to pass centrally and preferably from above into the filter element 1 and has an oil drain at the bottom. The housing is not shown for the sake of clarity. The design of such a housing is very familiar to the person skilled in the art and permits the insertion and replacement of a filter cartridge 1.
    For the sake of clarity, the individual layers of the media package M are spaced apart. In reality, these are tightly packed, for example wrapped. Thus, it is also understood that through the section that is free of fine filter 4 (this is the length Hfree minus HP), there is no bypass for the gas flow. Rather, the gas flow G passes through the fine filter. 4
    It has been found to be essential for the function that at least one filter layer with capillary effect 3 is provided before and after the passage P.
    The liquid O flows by gravity in or on the media pack M in the direction of the bottom 5 of the filter cartridge 1 and flows over the edge R (indicated by an arrow at the edge R). The mass fraction of liquid separation occurs at the first flowed by the gas flow
    Surface of the media package M, which is formed here by a filter medium for liquid separation 2, preferably a coarse filter.
    The cylinder-shaped in this embodiment filter media 2, 3and 4 are connected by an adhesive layer K with the height H «to the bottom 5. The bottom 5 is usually designed as a deep-drawn sheet, with an edge Rausgebildet. In operation, the liquid O collects at the bottom 5, thus creating a liquid level. The height of the rim R dictates the height of the liquid level during operation in the filter element. Liquid O flows radially out of the filter cartridge in this embodiment. The height of the rim R thus also gives the height of the level of the liquid level at steady-state operating conditions.
    In the embodiment shown in Figure 1, the height of the edge R is chosen so that the fine filter 4 does not protrude in operation in the liquid level, that is spaced therefrom.
    Thus, during operation of the filter element 1, a passage P with the height HP is obtained, which allows a significantly improved liquid discharge compared with the prior art, since the separated liquid does not have to flow through the fine filter 4.
    The filter medium with capillary effect 3 causes the passage P downstream of the fine filter 4 is sealed gas-tight. Thus, no gas of the gas stream G can leave the filter element 1 without first having passed through the fine filter 4. The height Hc denotes the length over which the filter media with capillary effect 3 are impregnated by liquid and thus gas-tight. As explained earlier in the description, Hc is the height of rise of the liquid due to the capillary effect in the medium 3. The height Hfree denotes the height which lies between the adhesive layer K and the fine filter 4.
    In the embodiment according to FIG. 2, the edge R of the bottom B or the length of the fine filter 4 is set up such that the fine filter 4bis extends into the liquid level during operation of the filter insert 1. The height of the liquid level is determined by the height of the rim R. The height of the passage HP is then around the
    Immersion depth of fine filter 4 in the liquid level compared to the embodiment of Figure 1 reduced.
    In the embodiment according to FIG. 3, a further layer of filter medium with capillary effect 3 is provided within the layers of fine filter 4. Thereby, the gas flow is also deflected within the media package - through the gas-tight barrier of the impregnated portion of the filter medium with capillary effect 3 - and must pass through the fine filter 4. This can of course be repeated, i. Several layers of capillary filter media 3 may be provided within the media pack.
    In the figures, at least one fine filter 4 is shown in the media package M respectively. The invention is not limited to that the media pack M has a filter medium 4 for fine separation and the passage P is formed by a fine filter-free portion. Rather, it can be provided that a passage P is realized within the media package M, for example by means of openings or channels within the media package M. These openings or channels are then preferably arranged in the lower region of the media package M.
    In the figures, only a sequence of filter medium 4 for fine separation and filter medium with capillary effect 3 is shown in each case. The arrangement can of course be repeated. Thus, several sequences of fine filters 4 and filter layers with capillary effect 3 can be provided.
    It can also be provided that the passage P is not formed over the entire angular range of 360 °, but only in segments thereof.
    The passage P can also be realized in practice so that the adhesive layer K is formed on the bottom 5 in preferably concentric, annular beads. This ensures that there is no connection of the respective filter medium to the bottom 5 between the adhesive beads, thereby realizing a passage P.
    FIG. 4 shows a filter device 8 in which a filter element 1 is arranged. In the construction shown here, the gas G flows centrally from above into the filter device 8 and flows through the filter element 1 from the inside to the outside. The liquid is deposited on the media package M and flows downwards by gravity. It flows radially outward over the bottom 5 and leaves the housing 6 via a liquid drain 7.
    FIG. 5 shows a plan view of the bottom 5 of a filter element 1, wherein in this embodiment the adhesive layer K is applied in the form of caterpillars not circumferentially closed, so that the media package M (not shown here) is not connected to the bottom 5 completely. Also in this way, a passage P for draining liquid O can be created.
    FIG. 6 shows an internal combustion engine 9 with a filter device 8. The switching of a filter device 8 for separating off liquid O from the gas G is familiar to the person skilled in the art and need not be explained in greater detail here.
    List of reference numbers used: 1 filter element 2 filter medium for liquid separation 3 filter medium with capillary effect 4 filter medium for fine separation 5 bottom 6 housing 7 oil drain 8 filter device 9 internal combustion engine G gas, gas flow K adhesive layer O liquid P passage R edge S symmetry axis
    Innsbruck, September 15, 2014
    权利要求:
    Claims (15)
    [1]
    Claims 1. A filter insert (1) for separating liquid droplets from a gas stream (G) comprising: - a media package (M) consisting of layers of filter media (2, 3 and 4), a gas stream (G) to be cleaned during operation passing through the media pack (M), - a bottom (5) which, with respect to a direction of discharge of a gas stream (G) separated liquid (O), in the lower region of the filter insert (1) is arranged, characterized in that between the filter medium ( 4) for fine separation of the media package (M) and the bottom (5), or within the media package (M) is provided over the radius of the filter cartridge (1) extending passage (P) for the liquid (O).
    [2]
    A filter cartridge (1) according to claim 1, characterized in that the media package (M) includes at least one fine filter (4).
    [3]
    3. Filter insert (1) according to claim 1, characterized in that the passage (P) is largely or completely free of fine filter (4).
    [4]
    4. Filter insert (1) according to one of the preceding claims, characterized in that the media package (M) has at least one capillary effect layer (3).
    [5]
    5. Filter insert according to claim 4, characterized in that the filter medium (3) has a rise height (Hc) of the capillary action of 2 to 10 cm, preferably 2 to 5cm.
    [6]
    A filter cartridge (1) according to claim 4 or 5, characterized in that the capillary-effect layer (3) is designed to operate through the media pack (M), preferably on the upstream and downstream sides of the gas (G) Capillary effect partially sealed gas-tight.
    [7]
    7. Filter insert (1) according to at least one of the preceding claims, characterized in that several layers of filter medium (3) within the media package (M), in particular within the arrangement of filter medium (4) and in the flow direction of the gas stream (G) before and after the arrangement of filter medium (4) are arranged.
    [8]
    8. Filter insert (1) according to one of the preceding claims, characterized in that the passage (P) has a height in a range of less than 0.5% to 2% of the height of the filter cartridge (1).
    [9]
    9. Filter insert (1) according to one of the preceding claims, characterized in that the passage has a height of 5 mm to 20 mm.
    [10]
    10. Filter insert (1) according to one of the preceding claims, characterized in that the filter cartridge (1) has a cylindrical basic shape and the media package (M) consists of preferably wound layers of filter media (2, 3 and 4).
    [11]
    11. Filter insert (1) according to one of claims 1 to 9, characterized in that the filter cartridge (1) has a cuboidal basic shape and the media package (M) consists of layered layers of filter media (2, 3 and 4).
    [12]
    12. Filter device (8) with a filter insert (1) according to any one of the preceding claims.
    [13]
    A filter device (8) comprising a filter cartridge (1) according to any one of the preceding claims, wherein the height of the passage P (Hp) is less than the height (Hr) of the edge minus the height (Hk) of the adhesive, (Hr - Hk).
    [14]
    14. Filter device (8) with a filter cartridge (1) according to one of the preceding claims wherein the passage P is formed by an arrangement of the adhesive (K) and / or a shape of the bottom (5) with recesses in the region of the filter medium (4).
    [15]
    15. Internal combustion engine (8) with a filter device (8) according to claim 12.
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    法律状态:
    2018-09-15| HA| Change or addition of new inventor|Inventor name: THOMAS TRENKWALDER, AT Effective date: 20180727 Inventor name: GUENTHER WALL, AT Effective date: 20180727 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50644/2014A|AT516310B1|2014-09-15|2014-09-15|filter cartridge|ATA50644/2014A| AT516310B1|2014-09-15|2014-09-15|filter cartridge|
    EP15002505.4A| EP3000520B1|2014-09-15|2015-08-24|Filter insert|
    CA2901846A| CA2901846C|2014-09-15|2015-08-25|Filter insert|
    JP2015167512A| JP6095178B2|2014-09-15|2015-08-27|Filter insert|
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    KR1020150129977A| KR101751124B1|2014-09-15|2015-09-14|Filter insert|
    CN201510586406.7A| CN105413322B|2014-09-15|2015-09-15|Filter core, filter and filter are used for the application of internal combustion engine|
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