• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
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    • 专利摘要:
    Double-stage filtration with barrier for separating water from fuel is a double-stage filter that includes an external filter with a first medium and an internal filter with a second medium. A barrier is located between the first medium and the second medium. The barrier directs the flow of fluid between the first and second medium. the barrier creates a flow path between the first and second means, so that a working fluid, which must pass through the first and second means, is directed by the barrier and flows through the second medium, and so that another fluid, which should not pass through the second medium, be directed by the barrier and separated from the working Using the barrier, the dual-stage filter can employ both up and down flow to achieve efficient fluid separation, for example, separation of water from fuel in an engine fuel filter.
    公开号:BR112012000447A2
    申请号:R112012000447
    申请日:2010-07-08
    公开日:2019-09-10
    发明作者:Le Ven Arnaud；M Verdegan Barry；Malgorn Gerard；Guichaoua Jean-Luc；Picard Jean-Yves；T Wieczorek Mark；W Shults Terry
    申请人:Cummins Filtration Ip Inc；
    IPC主号:
    专利说明:

    DOUBLE STAGE FILTRATION WITH BARRIER FOR SEPARATION OF FUEL WATER
    This application claims to benefit from Provisional US Order No. 2 Series 61 / 224,014, filed on July 8, 2009, and entitled Dual Stage Filter Cartridge for Fuel Water Separation, the entirety of which is incorporated by reference herein.
    Field of the Invention
    The present disclosure relates, in general, to double stage filtration. More particularly, the present disclosure relates to dual stage filters employing a barrier that is useful for separating water from fuel.
    Background of the Invention
    Improvements can be made to existing buildings using double-stage filtration media. More particularly, improvements can be made to existing two-stage filters used, for example, in separating water from fuel, such as, for example, in various engine fuel systems.
    summary
    In general, an improved two-stage filter with a barrier structure is described which can be useful in separating an unwanted fluid from a desired working fluid. For example, the double-stage filter described here can be useful in applications such as separating water from fuel in engine fuel filtration systems. It will be appreciated that the double stage filter can be useful in other applications besides the separation of water from the fuel, for example, when there is
    2/28 need to separate a working fluid from other contaminants or unwanted fluids.
    The double-stage filter, as illustrated and described here, is able to improve filtration capabilities, for example, in water-fuel separation applications.
    In one embodiment, a double-stage filter is a cartridge-type structure for mounting with a housing (or housing) and vertical tube, as they are known, for example, in fuel filtration systems. The double-stage filter cartridge includes an external filter with a first medium and an internal filter with a second medium. A barrier is located between the first medium and the second medium. The barrier directs the flow of fluid between the first and the second medium. The barrier creates a flow path between the first and second medium, so that a working fluid, which must pass through the first and second medium, is directed through the barrier and flows through the second medium, and so that another fluid, which should not pass through the second medium, is directed through the barrier and separated from the working fluid. Using the barrier, the double-stage filter cartridge can employ both upward and downward flow to achieve efficient fluid separation, for example, separation of water from the fuel in an engine fuel filter.
    In some embodiments, the barrier includes a wall that extends below the external filter.
    In some embodiments, the barrier includes a wall that extends towards the external filter and to
    3/28 below this.
    In some embodiments, the barrier includes a wall with a textured surface.
    In some embodiments, the barrier includes a spiral flange on a surface of the barrier that faces this external filter. In some embodiments, the spiral flange is a component that can be mounted separately with the barrier.
    In some embodiments, the internal filter includes an additional barrier part above the second medium. In some embodiments, the additional barrier part includes a spiral flange facing the barrier, which provides another flow aid with centrifugal force for further separation.
    In some embodiments, an additional medium is within a space between the external filter and the barrier, and / or an additional medium is within a space between the barrier and the internal filter. In one embodiment, the additional means are close to the bottom of the filter cartridge.
    In one embodiment, a method of separating water from fuel in a two-stage liquid filtration includes moving a mixture including fuel and water through a first medium. The mixture comes in contact with a barrier. The mixture is directed around the barrier, so that the direction of the mixture includes modifying the flow of the mixture, thus separating the water from the fuel. The mixture is then moved to a second medium, in which the additional water possibly present in the mixture is removed from the fuel.
    4/28
    Brief Description of Drawings
    The drawings presented here illustrate and provide a description of the various inventive concepts of a double stage filtration cartridge.
    Fig. 1 is a sectional view of a filter cartridge with dual stage filtration medium, and illustrating multiple embodiments of a barrier that directs fluid flow between the dual stage means.
    Fig. 2A is a side view of an embodiment of the wall structure for a barrier that can be used in the filter cartridges disclosed herein, for example, the filter cartridge of Fig. 1.
    Fig. 2B is a side view of another embodiment of the wall structure for a barrier that can be used in the filter cartridges disclosed herein, for example, the filter cartridge of Fig. 1.
    Fig. 3 is a perspective view illustrating the exterior of another embodiment of a filter cartridge with double stage filtration medium.
    Fig. 4 is a sectional view of the filter cartridge of Fig. 3 illustrating another embodiment of a barrier that directs the flow of fluid between the two-stage medium.
    THE Fig. 5 is an View bottom of cartridge in filter gives Fig. 3. THE Fig. 6 is an View from above of cartridge in filter gives Fig. 3. THE Fig. 7 is an View side so barrier gives Fig. 4. THE Fig. 8 is an View in section gives barrier gives Fig. 4.
    Fig. 9 is another embodiment of a barrier, which can be used in the filter cartridges presented here,
    5/28 for example, the filter cartridge of Fig. 3.
    Fig. 10 is a perspective view of an embodiment of a second stage middle member of the double stage medium of Fig. 3.
    Fig. 11 is a sectional view of the second stage middle member of Fig. 10.
    Fig. 12 is a sectional view of another embodiment of the filter cartridge with double stage filtration medium, and illustrating a barrier that directs the flow of fluid between the double stage means.
    Fig. 13 is a perspective view of another embodiment of a second stage medium means and illustrating an additional flow assist element.
    Fig. 14 is a sectional view of the second stage middle member, illustrating the additional flow assist element.
    Detailed Description
    Figs. 1-14 and the following descriptions illustrate and describe an exemplary embodiment of a dual stage filter. In general, an improved two-stage filter with a barrier structure is described which can be useful in separating an unwanted fluid from a desired working fluid. For example, the double-stage filter described here can be useful in applications such as separating fuel water from engine fuel filtration systems, for example, where fuel is the working fluid and water is the fluid to be used. be separated. It will be appreciated that the double stage filter can be useful in other applications besides the separation of water from the fuel, for example, when there is a need for
    6/28 separating a working fluid from other contaminants or unwanted fluids.
    The double-stage filter, as illustrated and described here, is able to improve filtration capabilities, for example, the ability to separate water from fuel in fuel filtration applications. The double-stage filter is represented and described as a cartridge-type structure that can be mounted, for example, with a housing (or housing) and vertical tube, as known, for example, in engine fuel filtration systems ( housing and vertical tube not shown). It will be appreciated that the double-stage filter can be constructed in other ways besides a replaceable cartridge used in conjunction with known housing and vertical pipe structures.
    Referring to Fig. 1, a double stage filter cartridge 10 includes an external filter with a first medium 12 and an internal filter with a second medium 14. As illustrated, the internal filter is disposed within the external filter, and the filters can be arranged in a concentric filter in a known filter configuration. The external filter includes end plates 22 and 24, illustrated as upper and lower end plates, respectively. Similarly, the internal filter has end plates 28 and 26, illustrated as upper and lower end plates, respectively, and can include a central tube 38 for additional support.
    In some embodiments, the external and internal filters are connected together. External and internal filters can be connected using various constructions and
    7/28 known configurations as appropriate, such as, for example, using a press fit, an interference fit, a weld, or the like.
    As shown, the upper end plate 22 of the external filter has a staggered construction, so that the first and second means can be at different heights. It will be appreciated that end plate 22 can be constructed without a difference in height, and can be constructed with the same height throughout.
    Each of the outer filter and the inner filter includes a seal 20, 30. Seal 20 is used to seal the outer filter, for example, in a filter housing. Seal 30 is used to seal the
    filter external, for example , in a vertical tube for O fluid clean or dry (for example, fuel) go out of filter.In relationship to the first and in the second half, the that will be introduced to following is with reference to the medium used at
    filtration by separating the water from the fuel. It will be appreciated that it is possible to employ other means, for example, in applications other than the separation of water from fuel.
    With regard to the separation of water from the fuel, the first medium of the external filter is constructed, for example, of a coalescent medium. Generally, the coalescent medium is capable of capturing drops in the size range of 1 to 20 microns, where such medium could be polyester, nylon, or other suitable material, as appropriate. The coalescent (or coalescing) medium can cause water to separate from a mixture including fuel and water and
    8/28 coalesce to droplet sizes of approximately 1-2 mm, and sometimes, for example, reaching about 4 mm.
    Generally, the second medium of the internal filter is constructed, for example, with a fine particulate filtration medium. In many cases, the second medium generally includes a hydrophobic material, and is typically not as narrow as the first medium. The fine particulate filtration medium acts as a separator capable of removing particulate substances and materials with dimensions of approximately 0.5 mm or less, and also dimensions of approximately 50 microns. The second medium helps to remove such particulate substances and materials that may not have been removed by the first medium. In one embodiment, the second medium includes a hydrophobic material. It will be appreciated that the above description of the first and second medium is not intended to be restrictive and that, where appropriate, the type of material can be modified as desired and / or necessary to achieve the desired particulate filtration and coalescence effects.
    With further reference to Fig. 1, the barrier (16a or 16b) is between the first medium 12 and the second medium 14. The barriers 16a, 16b represent two types of barrier for different embodiments. The differences between barriers 16a, 16b are further described below.
    Generally, the barriers illustrated and described here are arranged in a space between the first medium and the second medium and are concentric with the external and internal filters. The barrier directs the flow of fluid between the first and the second medium. The barrier creates a flow path between the first and the second medium, so that a
    9/28 working fluid (for example, fuel), which must pass through the first and second medium, is directed through the barrier and flows through the second medium, and so that another fluid (for example, water) that does not it must pass through the second medium, be directed by the barrier and separated from the working fluid. As shown in the drawings, the barrier and the external filter are constructed and configured in order to prevent deviation from the flow path created by the barrier. That is, the barrier and the external filter are configured so that the mixture upstream of fluids (for example, contaminated fluids) does not advance to the internal filter without first being directed by the barrier. Using the barrier, the double-stage filter cartridge can employ both upward and downward flow to achieve efficient fluid separation, for example, separation of water from the fuel in an engine fuel filter.
    With additional reference to Fig. 1, barriers 16a, 16b provide separate embodiments of a flow assist structure, for example, capable of helping to improve the fuel water separation performance of a double stage medium filter, such as as, for example, in a filter configuration within a filter. The barrier (16a or 16b) is placed between the first medium 12 and the second medium 14. Generally, the barrier (16a or 16b) provides a flow path that directs a mixture including fuel and water to effect a significant change in direction. The change in direction creates a low-speed area that allows water to separate from fuel. In Fig. 1, the flow path includes a
    10/28 change in direction, for example, which makes the fluid flow in the opposite direction from gravity.
    As illustrated, Fig. 1 represents two different barrier geometries (16a or 16b). Either barrier is substantially sealed to one of the upper end plates, so that no deviation or minimal deviation from the barrier is allowed. As illustrated, the barrier is sealed to the upper end plate 22 of the external filter, as in area 36. An airtight seal can be used, but this is not mandatory, as there may be a minimum leak that can be left without damage the function of the filter 10.
    With specific reference to barrier 16a, the right side of Fig. 1 illustrates barrier 16a as a vertical barrier, in which the flow path advances directly to the bottom part 18a of the barrier and then reverses direction, approximately 180 ° opposite gravity towards the second medium 14. As illustrated, the barrier 16a, including the lower part 18a, is constructed as a vertical wall. Below the lower part 18a, the water which coalesced in droplets 40, after passing through the first medium 12, can accommodate or separate from the flow path. Water passing through the first medium 12 can also come in contact with barrier 16a or enter barrier 16a and coalesce further, forming more droplets 40 or larger droplets. Fuel flowing at a higher speed and having a lower density in relation to water droplets can continue in the flow path to the second medium 14.
    That is, as the fuel and droplets of
    11/28 coalesced water 40 flows around barrier 16a, the greater inertia of the denser water phase, in combination with gravitational forces, separates water from the fuel stream. Water can be collected, for example, in a reservoir (not shown), which can be located below barrier 16a. It will be appreciated that the reservoirs are well known, therefore, they are not described in detail.
    Fig. 1 illustrates the first medium 12 as a first coalescer. Barrier 16a changes the direction of fluid flow, so that water and water droplets tend to remain in a low speed zone and leave the flow path (for example, to a water reservoir) and fuel continues for the second medium 14 or stage 2 of particulate filtration and additional water removal (if necessary). Barrier 16a provides a barrier against which the fluid flow would impact as it exits the first stage coalescer. Water can accumulate on the wall, coalesce, separate from fuel and drain out of the filter (for example, into a reservoir).
    With further reference to the barrier 16a, it will be appreciated that the barrier 16a can be constructed as a tube-like element that is placed between the concentric arrangement of the first and second means 12, 14. It will also be appreciated that, if the barrier 16a is employed, the filter 10 on the left side of Fig. 1 would not have the widening of the barrier 16b (described below). Instead, the tube would have a generally vertical wall from top to bottom, and would reside in the space between the first and second medium 12,
    12/28.
    With additional reference to the barrier 16a, the height of the wall, in some embodiments, is approximately equal to the height of the external filter. In some embodiments, as shown in Fig. 1, the barrier 16a includes a wall that extends below the external filter. That is, the barrier 16a could be a thin tube, extending from the upper end plate 22, to just below the lower end plate 24. In some embodiments, barrier 16a can extend about 0.25 to about 0.5 inches (0.64 to 27 cm) below the bottom end plate 24 of the external filter.
    It will be appreciated that the distance at which the barrier 16a extends beyond the end plate infer 24 can be limited by other design restrictions. For example, in a filtration module containing a collection reservoir or sump (not shown), the problem of reentering water may arise if barrier 16a extends too close to a reservoir, that is, too far below the end plate lower 24. Thus, in some embodiments, it is desirable that barrier 16a does not extend too far, as the collected fluid could rise to a level that would allow it to re-enter barrier 16a. That is, the construction of the barrier 16 is such that it does not come close to such a level of the collected fluid, for example, so that reentry problems are avoided.
    It will also be appreciated that the barrier 16a may be shorter, if desired and / or necessary, for example, by about 3 mm.
    As long as the space between the barrier wall 16a and
    13/28 the first medium 12 is large enough for water droplets to form and separate from the fuel, the height of the barrier 16a can be changed as needed and / or desired to further facilitate the separation. A space must be dimensioned so that droplets of about 1-2 mm in diameter and, sometimes, up to 4 mm in diameter can be accommodated and drained. In some embodiments, the space between the medium 12 of the external filter and the barrier wall 16a is approximately 3-4 mm, so that coalescence can occur and droplets can form. With respect to the space between the inner diameter of the barrier 16a and the second means 14 of the inner filter, the space can be dimensioned in a similar way as the space between the first means 12 and the wall of the barrier 16a. It will be appreciated that, since smaller droplets tend to be present at this stage in the flow path, the space could be smaller than appropriate.
    With specific reference to the barrier 16b, a vertical wall has a lower part 18b that extends towards and below the external filter. As with barrier 16a, barrier 16b illustrates the first medium 12 as a first stage coalescer. Barrier 16b provides additional changes in the direction of fluid flow, so that water and water droplets tend to remain in a low speed zone and leave the flow path (for example, to a water reservoir) and the fuel continues to the second medium 14, where particulate filtration and additional water removal (if necessary) can occur. Barrier 16b provides a barrier against which the flow of fluid would impact the
    14/28 as it leaves the first stage coalescer. Water can accumulate on the wall, coalesce, separate from fuel and be drained into a water tank. The water passing through the first medium 12 can also contact barrier 16b or enter barrier 16b and additionally coalesces to form more droplets 40 or larger droplets. Fuel that flows at a higher speed and with a lower density in relation to water droplets can continue on the flow path to the second medium 14.
    As with barrier 16a, it will be appreciated that barrier 16b can be constructed as a tube-like element that is placed between the concentric arrangement of the first and second means 12, 14. It will also be appreciated that, if barrier 16b is employed, the filter 10 on the left side of Fig. 1 would not have the barrier 16a. Regarding the considerations of height and space, heights and similar spaces can be used as well as with barrier 16a, avoiding, at the same time, re-entry and accommodating the
    size of droplets coalesced. THE lower part extended 18b is additionally described like follows. At part left gives Fig. 1, The barrier 16b is
    structured as a vertical wall that includes a lower part 18b that extends below the external filter, for example, the stage 1 coalescer. The enlarged lower part 18b creates a point where the fluid flow inversion occurs which is greater in its circumference, thus reducing the speed of fluid flow. The enlarged lower part 18b provides a change in speed, due to the increase in circumference in the part
    Lower 15/28 enlarged 18b, and change of direction. In some embodiments, the change in the flow direction is about 180 degrees (see flow arrows around the enlarged bottom 18b). Such a change of direction can additionally promote the drainage of water embedded in the barrier to separate it from the fuel (for example, and collect it in a reservoir).
    use of the enlarged bottom 18b can help to further reduce the accumulation of water in the second medium 14, for example, in the stage particulate filtration medium
    2. As illustrated, the change of direction is an enlargement that can reduce the speed of water and water droplets relative to the fuel, in order to allow the water and water droplets to separate from the fuel. Fig. 1 shows two changes of direction, one around the enlarged bottom 18b and the other finally around the barrier 16b (for example, use of gravity). Such a configuration can provide two water outlets, one at the change of speed of the enlarged lower part 18b, and the other by the use of gravity (e.g., upward flow) and around the barrier 16b.
    With additional reference to the enlarged lower part 18b, the enlargement can be constructed to be about 46 mm from a wall of the housing or casing, so as to allow sufficiently large droplets to fall in the change of direction. As illustrated, the enlarged lower part 18b has a radius in which it turns from the vertical part of the barrier 16b and increases in circumference towards the external filter. The radius can be constructed to form a smooth and somewhat gradual transition to
    16/28 from the vertical wall of the barrier 16bl and along the extended lower part 18b. Such a structure can help to reduce the flow of cross-section fluid and eddy currents.
    With additional reference to Fig. 1, some embodiments may employ an additional means to help separate water from fuel. In one embodiment, the additional medium 32 is disposed within a space between the first external filter medium 12 and the barrier (16a or 166b). In another embodiment, the additional means 34 is disposed within a space between the barrier (16a or 16b) and the second means 14 of the internal filter. In one embodiment, medium 32 is a coalescent medium. In one embodiment, medium 34 is a hydrophobic screen.
    In one example, both means 32, 34 are located near the bottom of the filter cartridge. It will be appreciated that the means 32, 34 can be positioned in other locations, if appropriate. It will be appreciated that means 32, 34 can take various forms. For example, either of the means 32, 34, or both, can be constructed as a sheet or layer of medium, or as a wad of material, or, more generally, an element with a certain depth. The specific configuration of the means 32, 34 can be modified as desired and / or necessary, and what has been said above is not intended to be limiting.
    It will be appreciated that one of the means 32, 34, or both, can be employed with either of the barriers 16a or 16b. Just to facilitate the illustration, the means 32, 34 are illustrated in relation to the barrier 16b, but it will be appreciated that the means 32, 34 can be present on the side
    17/28 right of Fig. 1. For example, medium 32, 34 can be arranged concentrically in relation to being between the barrier and the external filter (for example, medium 32) or between the barrier and the internal filter (for example, example, medium 34).
    With additional reference to the external seal 20, which seals the external filter, for example, to a filter housing or housing, the external seal 20 can also be composed of a means that allows separation of the water. For example, instead of being composed of a general fluid seal, seal 20 can be an element composed of an additional medium disposed in an outer diameter of the lower end plate 24 of the outer filter. The medium would be configured to separate an unwanted fluid (eg, water) that does not flow through the external filter, from a desired fluid (eg, fuel).
    With reference to Figs. 2A and 2B, the barrier can take on several other implementations, which can be applicable to the filter 10. In the embodiments of Fig. 1, the barrier is illustrated as a tube with a smooth surface. In other embodiments, the barrier can be constructed with a wall that is textured on a surface of the barrier that faces the external filter.
    As shown in Fig. 2A, for example, the barrier 16c has a textured surface with a spiral flange 18c. The spiral flange can provide additional support and drainage capacity. For example, the spirals can extend out of the wall and stay close to or lightly contact the inner diameter of the outer filter, for example, the first medium 12. Such a configuration
    18/28 provides support for the external filter, while the spiral geometry simultaneously helps to direct the fuel / water to the bottom for separation. The spacing of the spirals would be designed so as not to impede the flow of fluid. In some instances, the spacing can be about 5 to 6 mm, to allow a spacing to accommodate coalesced droplet sizes.
    It will be appreciated that the spiral flange 18c can be molded in the tube or formed in the barrier 16c (e.g., tube). For example, the spiral flange 18c can be formed using, for example, a shell-shaped mold.
    In some embodiments, the spiral flange 18c is a component mounted separately on the outer surface of the barrier 16c. For example, the spiral flange 18c is a flexible, free-flowing spiral flow component that resembles a coiled spring inserted into the filter. In some mounting situations, such a construction may be particularly desirable or appropriate in combination when the seal (e.g., seal 20) of the external filter element is composed of a coalescing medium. For example, a separate spiral flow component could be loaded at the top of the filter between the external and internal filters, together with a first medium (for example, the seal 20) between the housing and the external filter.
    It will be appreciated that the barrier texture is not limited to a spiral flange. In other circumstances, when appropriate or desired, the barrier facing the inner diameter of the first medium may or may not be textured, as appropriate. Instead of setting
    19/28 spiral 18c, or even in addition to it, the barrier may have nano-ridges and / or a combination of at least one hydrophobic part, and at least one hydrophilic part to further assist in the coalescence of the water droplets.
    Fig. 2B illustrates another barrier 16d. Barrier 16d includes a wall with openings 18d near a lower end. Such a barrier could be placed between the external and internal filters, such as in a two-stage coalescer of the filter type within the filter. In some embodiments, barrier 16d is permanent and reusable. Barrier 16d may be mountable in a filter housing or housing, such as at the bottom, but above any collection reservoir, and extend upward between the internal and external filters. The lower part of the barrier includes openings 18d to facilitate the flow of fluid through and around the barrier 16d. It will be appreciated that, as with the other described barriers, the barrier 16d can be constructed to extend to the upper end plate, or as close as is practical within the tolerances of the filter design.
    Other modifications to the general structure of the filter cartridge illustrated in Fig. 1 can also be employed. For example, upper end plates 22, 28 can be combined into a single end plate to reduce processing & component costs. In addition, the barrier tube can also be molded into the end plate (for example, end plate 22) to further reduce the number of components.
    20/28
    With reference to Figs. 3 to 11, another embodiment of the double stage filter cartridge 100 is illustrated. Generally, the illustrated barrier 116 includes a spiral flange 118 disposed on a surface of the barrier 116 facing the first means 112 of the external filter. In some embodiments, the spiral flange 118 is near / in contact with an inner diameter of the first means 112 and supports the outer filter.
    With reference to the general structure of the double stage filter cartridge 100, many structures employed in the filter cartridge 10 are similar to the cartridge 100 and are briefly described as follows. The filter cartridge 100 includes an external filter containing the first medium 112 and an internal filter or second stage medium member 114. The second stage medium member 114 has a main body 128 and a second medium 126. As illustrated, the internal filter is arranged inside the external filter, and the filters can be arranged in a concentric filter in a known filter configuration. The external filter includes end plates 122 and 124, illustrated as upper and lower end plates, respectively. The second stage middle member 114, however, has a main body 128 with openings including the second medium 126. In the illustrated embodiment, the upper end of the cartridge 100 includes a relatively small opening 146 and the seal 150, for example, to provide a pressure release / additional valve capacity. In the illustrated embodiment, the flow of filtered fluid is through the main outlet 132, which is illustrated at the bottom of the cartridge 100.
    21/28
    Each of the outer filter and the inner filter includes a seal 120, 130. In one embodiment, seal 120 is used to seal the second stage middle member 114, for example, to a vertical tube for clean or dry fluid (for example, fuel) come out of the filter without being contaminated. In one embodiment, seal 130 is used to seal, for example, a portion of a vertical pipe dedicated to draining unwanted fluids (for example, water).
    With respect to the first and second medium 112, 126, what will be presented below is with reference to the medium that can be used in filtration by separating water from the fuel. It will be appreciated that it is possible to employ other means, for example, in applications other than the separation of water from fuel. The first medium 112 is constructed, for example, with a coalescing medium. The coalescing medium (or coalescing agent) can cause the water to separate from a mixture including fuel and water and coalesce to droplet sizes of approximately 1-2 mm, and sometimes, for example, reaching about 4 mm. The second medium 126 is constructed, for example, from a particulate filtration medium. The fine particulate filtration medium acts as a separator capable of removing particulate substances and materials with dimensions of approximately 0.5 mm or less, and also dimensions of approximately 50 microns. The second medium 126 helps to remove such particulate substances and materials that may not have been removed by the first medium. In one embodiment, the second medium 126 includes a hydrophobic material, which can be composed as a hydrophobic screen.
    22/28
    Like the barriers described above, the barrier 116 is arranged in a space between the first means 112 and the second means 126 and is concentric with the external and internal filters. Barrier 116 directs fluid flow between the first and second medium 112, 126. Barrier 116 creates a flow path between the first and second medium 112, 126, so that a working fluid (for example, fuel ), which should pass through the first and second medium, is directed through the barrier and flow through the second medium, and so that another fluid (for example, water), which should not pass through the second medium, is directed through the barrier and separated from the working fluid. As the drawings show, the use of barrier 116 employs an upward flow to achieve efficient fluid separation.
    As shown in Fig. 4, the barrier 116 is structured, for example, as a central tube between the external and internal filters. The central tube has a spiral flange 118 creating a flow path that directs the fluid flow upwards to the top. The swirling movement caused by the spiral flange 118 helps to separate water from fuel. Openings 138 at the top of the barrier 116 and the spiral flange 118 allow fluid to flow through the barrier 116. Gravity can then be used, after the mixture of water and fuel passes through the openings 138, to separate the water from the fuel that the mixture flows downward between the barrier 116 and the inner filter body 128. The inner filter body 128 also acts as an additional barrier part, which, for example, can provide more time to allow separation
    23/28 of water before the fluid flow reaches the second medium 126.
    With further reference to the illustrated embodiment, the first medium can be a folded first stage medium suitable for coalescence. Barrier 116, with its spiral flange 118, is structured, for example, as a helically shaped tube, which can be formed by molding. Barrier 116 is substantially sealed to one of the filters, so that no deviation or minimum deviation from the barrier is allowed. As illustrated, the barrier is sealed in the middle of second stage medium 114 in area 134, and cooperatively sealed with the external filter through the seal 150. In the illustrated embodiment, the spiral flange 118 is close to / in contact with the internal diameter of the external filter, which provides support for the external filter. In some embodiments, a clearance or tolerance of approximately 0.5 mm is located between the barrier 116 and the external filter in order to prevent build-up and damage to the medium 112.
    In the illustrated embodiment, the spacing between the ribs of the spiral flange 118 is configured so that water or coalesced water droplets can be accommodated during the flow of fluid around and through the barrier 116. In one embodiment, the spacing is approximately 0.25 to 0.75 inch (0.64 to 91cm) between the ribs or spiral parts.
    In the illustrated embodiment, the second medium 126 can represent a hydrophobic screen as the second stage medium. As illustrated, the second medium 126 is in the openings of the internal filter and below the main body
    24/28
    128. The second medium 126 provides particulate filtration and additional water separation, allowing fuel to pass through. Water and water droplets are drained from the cartridge and must not pass through the second medium 126. Spacers 142 are illustrated at the bottom of the internal filter, which allow water to be drained from the cartridge 100 into the water drain opening 140 .
    An important aspect of cartridge 100 is that, for example, at certain flow rates, barrier 116 is used between the two stages of means 112, 126, where the spiral flange 118 of barrier 116 (e.g., tube) helps to further separate the coalesced water from the fuel before reaching the second medium 128.
    Referring to Fig. 9, another embodiment of a barrier 116a is illustrated. Similar to barrier 116, barrier 116a also includes a spiral flange 118a and upper openings 138a. The difference is the particular geometry of the spiral flange 118a, which is less linear and more wavy. It will be appreciated that the particular geometry of the spiral flange may vary as appropriate, and the spiral flanges 118, 118a, for example, in Figs. 7 and 9, are merely illustrative.
    With reference to Figs. 12-14, another embodiment of a filter cartridge 200 is illustrated. In general, the filter cartridge 200 includes a structure in which the internal filter or second stage medium member 214 includes an additional barrier part 228 above the second medium having another spiral flange 244. The spiral flange 244 is arranged in a outer surface of the additional barrier part 228. The spiral flange 244 faces a
    25/28 inner diameter of barrier 216.
    With reference to the general structure of the double stage filter cartridge 200, many structures employed in the filter cartridge 100 are similar to the filter cartridge 200, and such aspects are not described in detail. In general, the filter cartridge 200 includes an external filter containing the first medium 212 and the internal filter or second stage medium member 214 with a main body 228 and a second medium 226. As illustrated, the middle second member stage 214 is disposed within the external filter, and the filters can be disposed in a filter configuration within the filter, as it is known. The main body 228 acts as an additional barrier part, but in which an additional spiral flange 244 is used to further facilitate the separation of water from the fuel. Similar to filter cartridge 100, spacers 242 are used to allow water to drain from cartridge 200.
    With additional reference to the spiral flange 244, Figs. 12-14 illustrate an embodiment of a combination of a barrier 216 with an auxiliary spiral flange directing the flow upward, and another auxiliary spiral spiral flange 244 directing the flow downward. The filter cartridge 200 offers two devices to generate a double swirl effect.
    Such a configuration can be useful, for example, at high flow rates. The use of barrier 216 between the stages of the two media 212, 226 may not always be sufficient, as there may be a need to make the water and water droplets move as far as possible from the second media 226, for example, the hydrophobic screen. THE
    26/28 construction of Figs. 12-14 provides two swirl effect stages, (1) in the barrier tube 216 through flange 218, and (2) in the body of the hydrophobic screen 228 through flange 244.
    The whirlpool effect, for example, of flange 244, provides a centrifugal movement that allows water to drain as far as possible from the hydrophobic screen (for example, the second medium 226), so that water and water droplets are less in contact with the screen. That is, the centrifugal force created by the whirlpool effect moves water and water droplets away from the second stage medium member 214, that is, away from the second medium 226.
    With additional reference to the filter cartridge 100 of
    Figs. 3-11, below are presented some data of the results of the test of the efficiency of separation of the water from the fuel and the differential pressure.
    Fuel Water Separation Tests
    It was possible to achieve flow rates, for example, of 20 approximately 20 1 / min, when the first element of medium had a fold count of approximately 80, a fold depth of approximately 22 mm, a gap width of approximately 184, 8, a medium area of approximately 0.650 m 2 , and an impact speed of 25 approximately 30.7 1 / min-m 2 , and when the second medium element had a medium area of approximately 0.0076 m 2 , and an impact speed of approximately 2631.6 1 / min-m 2 .
    It was possible to achieve flow rates, for example, of approximately 14.35 1 / min, when the first
    The middle 27/28 had a fold count of approximately 80, a fold depth of approximately 22 mm, a gap width of approximately 132.9.8, a medium area of approximately 0.468 m 2 , and an impact speed of approximately 30 , 7 1 / min-m 2 , and when the second media element had a media area of approximately 0.005 m 2 , and an impact speed of approximately 2870.0 1 / min-m 2 .
    The water-fuel efficiency tests demonstrated an efficiency of approximately 91.1% to 97.1%, under test conditions using emulsified water at 0.25%, with droplet sizes of approximately 5-10pm, and a interfacial tension (IFT) of approximately 28 mN / m, subjected to 150 minutes using a valve provided at the water outlet to ensure a flow of 0.1 1 / min. Tests were carried out both at a typical flow density equivalent to the production design and at higher flow rates than the cartridge would typically be subject to during use.
    According to certain standards, for example, ISO TS 16332 for fuel filters for diesel engines, high efficiency can be obtained, for example, at approximately 96% at a flow rate of approximately 14 l / min, at approximately 87 % at a flow rate of approximately 17 1 / min, and at approximately 78% at a flow rate of approximately 20 1 / min. Such tests were carried out under conditions using 0.15% emulsified water, a reference fuel CEC RF 06 03 from Total with Hitec, and at an interfacial tension (IFT) of approximately 16 to 19 mN / m, at a duration of
    28/28 approximately 90 minutes using a valve arranged at the water outlet to ensure a flow rate of 0.1 l / min, with droplet sizes of approximately 60pm.
    Differential Pressure Tests ΔΡ
    Depending on the particular combination of media used for the first and the second media, the differential pressure results ranged from 0-10kPa and 0-8kPa, depending on the flow rate. For example, differential pressures showed 0, 5, 7, 8, 9 and 10kPa at the respective flow rates of 0, 300, 540, 720, 840 and 960 (1 / h). In another example using a different medium, the differential pressures showed 0, 3, 5, 6, 7 and 8kPa at the respective flow rates 0, 300, 540, 720, 840 and 960 (1 / h).
    In other examples, it is possible to obtain lower differential pressures using cartridge design 100. For example, it is possible to obtain flows of 14 1 / min at flow rates of 840 (1 / h) with a differential pressure of 9kPa. Over several flow rates of 0, 300, 540, 600, 720, 840, 900, 960 and 1200 (1 / h), the kPa results were 0, 5, 7, 7.5, 8, 9, 9.5, 10 and 12.
    The embodiments disclosed in the present application are to be considered in all respects as illustrative and not restrictive. The scope of the invention is indicated by the appended claims, rather than the previous description, and all modifications that fall within the meaning and equivalence range of the claims are intended to be encompassed by them.
    权利要求:
    Claims (5)
    [1]
    1. Filter, FEATURED for understanding:
    an external filter containing a first medium;
    an internal filter containing a second medium; and a barrier arranged between the first medium and the second medium, the barrier configured to direct the flow of fluid between the first and the second medium, the barrier configured to create a flow path between the first and the second medium, so that a working fluid, which must pass through the first and second medium, is directed through the barrier and flows through the second medium, and likewise another fluid, which should not pass through the second medium, is directed through the barrier and separated from the working fluid.
    [2]
    2. Filter, according to claim 1, CHARACTERIZED by the fact that the working fluid is combustible and the other fluid is water.
    [3]
    3. Filter, according to claim 1 or 2, CHARACTERIZED by the fact that the external filter and the internal filter are configured as a cartridge structure, in
    what the internal filter is arranged inside the filter external in an configuration concentric filter type inside in filter. 4. Filter, according with any an of
    claims 1, 2 or 3, CHARACTERIZED by the fact that the barrier includes a wall that has a height that is substantially equal to the height of the external filter.
    5. Filter according to any one of claims 1, 2, 3 or 4, CHARACTERIZED by the fact that
    2/5
    the barrier includes an wall what stretches below of external filter.6. Filter, in wake up with any an of claims 1, 2 , 3, 4 or 5 , CHARACTERIZED BY THE FACT in that the barrier includes a wall that « i widens toward to the external filter and for low this. 7. Filter, in wake up with any an of claims 1, 2 , 3, 4, 5 or 6, CHARACTERIZED by the fact that the barrier is textured on a surface gives barrier facing with the filter external.8. Filter, in wake up with any an of claims 1, 2 , 3, 4, 5, 6 or 7, CHARACTERIZED BY
    fact that the barrier includes a spiral flange arranged on a surface of the barrier facing the external filter.
    9. Filter according to any one of claims 1, 2, 3, 4, 5, 6, 7 or 8, CHARACTERIZED by the fact that the spiral flange contacts an internal diameter of the external filter and supports the external filter .
    10. Filter according to any one of claims 1, 2, 3, 4, 5, 6, 7, 8 or 9, CHARACTERIZED by the fact that the spiral flange includes a space of approximately 0.25 to 0.75 inches (0.64 to 91cm) between the spiral parts.
    11. Filter according to any one of claims 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10, CHARACTERIZED by the fact that the spiral flange is a component mounted separately on the outer surface of the barrier .
    3/5
    12. Filter, in wake up with any one of claims 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 or 11, CHARACTERIZED BY fact that the barrier is built like
    a permanent and reusable element, in which the barrier can be mounted in a filter housing and extends upwards between the internal and external filters.
    13. Filter according to any one of claims 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12, CHARACTERIZED by the fact that the barrier includes a wall with openings close to a lower end.
    14. Filter, in wake up with any an of claims 1, 2, 3, 4 , 5, 6, 7, 8, 9, 10, 11, 12 or 13, CHARACTERIZED fur fact that the barrier includes a or
    more among at least one hydrophobic part, at least one hydrophilic part, and nano-protrusions arranged on a barrier surface that faces the external filter.
    Filter according to any one of claims 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 or 14, CHARACTERIZED by additionally comprising another means arranged within a space between the outer filter and the barrier, the other medium located near the bottom of the outer filter.
    16. Filter according to any one of claims 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 or 15, CHARACTERIZED by additionally comprising another means arranged within a space between the barrier and the internal filter, the other means located near the bottom of the internal filter.
    17. Filter, according to any of the
    [4]
    4/5 claims 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 or 16, CHARACTERIZED by the fact that the external filter has an additional means arranged in an outer diameter of a lower end plate, the means configured to separate an unwanted fluid from a desired fluid that does not pass through the outer filter.
    18. Filter according to any one of claims 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 or 17, CHARACTERIZED by the fact that the outer filter includes a coalescent medium as the first medium, and the inner filter includes a hydrophobic medium as the second medium.
    19. Filter according to any one of claims 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17 or 18, CHARACTERIZED by the fact that the internal filter includes an additional barrier part above the second medium.
    20. Filter according to any one of claims 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18 or 19, CHARACTERIZED in that the additional barrier part includes a spiral flange disposed on an external surface thereof, the spiral flange facing an internal diameter of the barrier.
    21. Method to separate water from fuel in a dual stage liquid filtration, FEATURED for understanding:
    moving a mixture including fuel and water through a first medium;
    make the mixture contact a barrier;
    [5]
    5/5 direct the mixture around the barrier, so that the direction includes changing a direction of the flow of the mixture, thus separating the water from the fuel;
    move the mixture to a second medium; and
    5 remove any additional water that may be present in the mixture.
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    同族专利:
    公开号 | 公开日
    CN102481499A|2012-05-30|
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    US8551335B2|2013-10-08|
    US20110006017A1|2011-01-13|
    CN102481499B|2015-07-01|
    WO2011005990A1|2011-01-13|
    EP2451551B1|2016-09-07|
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    法律状态:
    2020-01-14| B11B| Dismissal acc. art. 36, par 1 of ipl - no reply within 90 days to fullfil the necessary requirements|
    2021-10-05| B350| Update of information on the portal [chapter 15.35 patent gazette]|
    优先权:
    申请号 | 申请日 | 专利标题
    US22401409P| true| 2009-07-08|2009-07-08|
    US12/832,729|US8551335B2|2009-07-08|2010-07-08|Dual stage filtration with barrier for fuel water separation|
    PCT/US2010/041405|WO2011005990A1|2009-07-08|2010-07-08|Dual stage filtration with barrier for fuel water separation|
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