CN111140416A - Filter element group for filtering fuel - Google Patents
Filter element group for filtering fuel Download PDFInfo
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- CN111140416A CN111140416A CN201811302433.7A CN201811302433A CN111140416A CN 111140416 A CN111140416 A CN 111140416A CN 201811302433 A CN201811302433 A CN 201811302433A CN 111140416 A CN111140416 A CN 111140416A
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- filter
- fuel
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- 239000000446 fuel Substances 0.000 title claims abstract description 77
- 238000001914 filtration Methods 0.000 title claims abstract description 51
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 61
- 239000012528 membrane Substances 0.000 claims abstract description 36
- 230000002093 peripheral effect Effects 0.000 claims abstract description 21
- 238000000926 separation method Methods 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims description 38
- 239000007787 solid Substances 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 12
- 239000012530 fluid Substances 0.000 claims description 6
- 230000002209 hydrophobic effect Effects 0.000 claims description 5
- 238000003780 insertion Methods 0.000 claims description 5
- 230000037431 insertion Effects 0.000 claims description 5
- 239000002283 diesel fuel Substances 0.000 claims 4
- 238000002485 combustion reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000005661 hydrophobic surface Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filtration Of Liquid (AREA)
Abstract
A filter element group of a filter assembly of a fuel (preferably diesel) filtration system. The filter element group extends along an axis (X-X) and comprises: a filter membrane through which fuel can pass in an axial direction, the filter membrane having an annular shape and defining a central cavity at an axis (X-X); a water separation and support device supporting the filter membrane and comprising: i) a base element supporting the filter membrane and presenting channels and/or holes through which the filtered fuel flows; ii) a tubular element extending into the central cavity and presenting an outlet duct having a substantially annular cross-section delimited by an outer peripheral wall and an inner peripheral wall delimiting the central passage along an axis (X-X); iii) a separator element through which the filtered fuel can pass for separation of water, wherein the separator element is accommodated on the inner circumferential wall of the base element and/or the tubular element.
Description
Technical Field
The present invention relates to a filter element group of a filter assembly of a fuel (preferably diesel) filtration system. Furthermore, the invention relates to a filter assembly comprising a filter element group. Furthermore, the invention relates to a filter system comprising a filter element group.
The environment in which the filter element assembly, filter assembly and filtration system of the present invention are located is in the automotive field: is adapted to be fluidly connectable to a fuel circulation system, wherein fuel flows from a fuel tank to a combustion chamber of the internal combustion engine.
Furthermore, it should be emphasized that in this specification, the generic term "filtration" refers to the ability of the filter element assembly to separate dirt from the fuel by blocking any suspended solid particles, as well as the ability of the filter element assembly to separate the fuel from the water contained therein.
Background
In this respect, in the prior art, solutions of filter element groups and filter assemblies are known, in which the fuel is first filtered from the solid particles and then separated from the water.
In known solutions for performing the different operations described above, the filter element group has specially designed components: a particle filtering device and a water separating device.
In this case, according to the ever present need in the automotive field, in order to limit the size of the vehicle components without reducing the number of components installed therein, solutions of substantially annular filter elements have proliferated, in which the fuel is passed in the radial direction firstly through the means for filtering the solids and secondly through the means for separating the water.
However, it has been found that in the production of such a solution, a compromise must be made: operating in a radial direction but with limited dimensions, it has been decided to sacrifice the radial dimensions of the means for particle filtration in order to provide means for separating water. However, this design choice is also reflected in the filtration capacity of the device, particularly in the storage capacity of solid contaminants (i.e., solid particles) prior to plugging the particulate filter.
An example of an embodiment of a filter element group with such a drawback is shown in document DE10123190a 1.
Disclosure of Invention
In view of the above, there is a strong need to provide a filter element group with improved fuel filtration, while taking into account the need to limit the dimensions to ensure the installation of auxiliary components such as sensors and/or washing devices. In other words, there is a strong need for a filter element group with efficient particle filtration and efficient separation of water from fuel, while keeping in mind that the technical field needs to limit the overall dimensions as much as possible.
It is an object of the present invention to provide a filter element assembly, a filter assembly and a fuel filtration system wherein the above needs are fully met and wherein the needs of a particular range of applications are also efficiently and effectively responded to.
This is achieved by a filter element assembly as claimed in claim 1, by a filter assembly as claimed in claim 12 and a fuel filtration system as claimed in claim 13. The dependent claims show advantageous embodiment variants with further advantageous aspects.
Drawings
Other characteristics and advantages of the invention will be better understood from the following description of preferred embodiments, given by way of non-limiting example, with reference to the accompanying drawings, in which:
FIG. 1 illustrates a perspective view of the filter assembly of the present invention, in accordance with a preferred embodiment;
FIG. 1a shows a perspective view of a separate portion of the filter assembly shown in FIG. 1;
FIG. 2 shows a schematic cross-sectional view of a fuel filtration system including the filter assembly of FIG. 1;
figures 3' and 3 "show two cross-sectional views of a filter element group according to the invention, for example a portion of a filter assembly according to figures 1 and 1a adapted to follow two different axial cross-sectional planes;
fig. 3' ″ shows a lower view of a filter element group according to the invention as shown in fig. 3' and 3 ';
figure 3a shows a perspective view of a separated part of the filter element group in figures 3', 3 "';
FIG. 4 illustrates a side view of a fuel filtration system including a filter assembly according to a preferred embodiment;
FIG. 4a shows a cross-sectional view of the fuel filtration system of FIG. 4;
fig. 5 shows a cross-sectional view of a filter element pack according to the invention, e.g. suitable as part of a filter assembly according to fig. 4 and 4 a;
FIG. 5a shows a perspective view of a separate portion of the filter element assembly of FIG. 5;
FIG. 6 shows a schematic cross-sectional view of a fuel filtration system including a filter assembly according to another preferred embodiment.
Description of reference numerals:
1, a filter element group; 2 a filter membrane; 21 upper end; 22 lower end; 200 a central lumen; 3 water separating and supporting means; 31 a tubular member; 310 an outlet conduit; 311 an inner circumferential wall; 3110 a circumferential through-hole; 311' inner sealing edge; 312 outer peripheral wall; 312' outer sealing edge; 300 a central channel; 32 a base element; 321 a channel; 322 holes; 325 sealing means; 3200 axial through holes; 3' a main component; 32' a primary base; 3 secondary components; 32 "a secondary base; 500 filter element components; 550 a filter body; 551a cup-shaped member; 551a bottom wall; 551a' clear the hole; 551b side wall; 5510 a cup opening; 552 a cover member; 5520 a lid opening; 5500 a filtration chamber; 5500' a water collection zone; 900 a fuel filtration system; 950 a head member; 951 a rod-like device; X-X axis.
Detailed Description
In the drawings, reference numeral 1 denotes a filter element group according to the invention. A filter assembly comprising correspondingly also the filter element group 1 is indicated by reference numeral 500. In addition, reference numeral 900 denotes a fuel (preferably diesel) filtering system, which includes a filter element group 1 and a filter assembly 500.
As described above, fuel filtration system 900 is particularly adapted to be fluidly connected to a fuel circulation system. In particular, the system 900 includes a filter assembly 500, the filter assembly 500 being fluidly placed upstream of the engine combustion chamber such that fuel reaching it is filtered of solid particulates and water, thereby allowing for efficient combustion and operation of the engine and adequate protection of components fluidly placed downstream of the filter element pack.
According to the present invention, fuel filtration system 900 includes a head member 950, head member 950 being particularly adapted for fluid connection with electrical conduits and filter element assembly 1 (and filter assembly 500 adapted for positioning filter element assembly 1). Specifically, head member 950 has a special fluid connection to receive dirty fuel and release filtered and clean fuel.
Depending on its application, headpiece 950 has a variety of embodiments: for example, in some embodiments, head member 950 includes a component for heating incoming fuel. Alternatively, the head member 950 comprises a rod-like device 951 extending and located at the axis X-X, for example a clearing bar and/or a support bar of a water level measuring sensor.
The present invention also relates to a filter assembly 500 suitable as part of a fuel filtration system 900. Such a filter assembly 500 includes a filter element pack 1, such as the filter element pack described in detail below.
According to some preferred embodiments, the filter element group 1 is replaceable in maintenance operations.
In addition, the filter assembly 500 includes a filter body 550, the filter body 550 defining a filtering chamber 5500 inside thereof, filtering occurs in the filtering chamber 5500 and the filter element group 1 is positioned in the filtering chamber 5500.
According to other preferred embodiments, the entire replaceable filter assembly 500 is removably secured to the header member 950 during maintenance operations; in this case, the filter assembly 500 is replaced together with the filter element group 1.
According to the invention, said filter body 550 extends axially along an axis X-X and comprises a cup-shaped element 551, the cup-shaped element 551 comprising a bottom wall 551a, a side wall 551b and a cup-shaped opening 5510 opposite the bottom wall 551a and peripherally surrounded by said side wall 551 b.
In accordance with the present invention, near the bottom wall 551a, the filtration chamber 5500 has a water collection area 5500'.
According to a preferred embodiment, the bottom wall 551a has a purge hole 551a 'located at the axis X-X, the opening of which allows the water collected in the water collection region 5500' to drain.
Furthermore, the filter body 550 comprises a closing lid element 552 of a cup-shaped opening 5510.
Preferably, the cap element 552 comprises a cap opening 5520 at the axis X-X, through which 5520 the filtered fuel flows. Unfiltered fuel from the fuel tank enters through an opening provided in the cover element (not shown).
According to a preferred embodiment, the cup element 551 and the lid element 552 are made of metal and are crimped together so as to form a single filter body 550.
According to other embodiments, the cup member 551 and the cap member 552 may be interconnected by reciprocal threads. In such an embodiment, for example, the cup-shaped element 551 and the lid element 552 have the form of two half-shells, preferably made of plastic material.
According to the invention, the filter element group 1 extends along an axis X-X and comprises two separate parts: a filter membrane 2 and a water separating and supporting means 3.
According to the invention, the fuel can pass through the filter membrane 2 in an axial direction, the filter membrane 2 extending over a height parallel to the axis X-X.
The filter membrane 2 extends axially between an upper end 21 and a lower end 22. Dirty fuel enters the filter membrane 2 from the upper end 21 and flows out from the lower end 22 to filter out solid particles.
According to the invention, the filter membrane 2 does not have end plates, but rather has substantially open end walls at both the upper and lower ends.
According to the invention, the filter membrane 2 has an annular shape and defines a central cavity 200 at the axis X-X.
According to the invention, the radial dimension of the filter membrane 2 is substantially equal to the diameter defined by the inner wall of the filter body 550.
Additionally, according to the present invention, the filter membrane 2 comprises a filter media wound into a roll. Preferably, the filter medium consists of cellulose and/or glass fibers and/or viscose and/or synthetic fibers such as nylon, polyester or mixtures thereof. According to a preferred embodiment, the filter medium is made of a fibrous material capable of retaining and accumulating solid particles and producing a coalescing effect on water droplets emulsified in the fuel.
According to the invention, the water separating and supporting means 3 have the dual purpose of supporting the filter membrane 2 and performing a separating action from the water on the fuel discharged from the filter membrane 2.
According to the invention, the water separating and supporting means 3 support the filter membrane 2 to the filter body 550 and are sealingly engaged by the head member 950.
The water separating and supporting means 3 actually comprise a base element 32 which engages with the lower end 22 of the filter membrane 2.
The base member 32 has a passage 321 and/or an aperture 322 through which filtered fuel discharged from the lower end 22 flows.
According to a preferred embodiment, the base element 32 has a main extension substantially radial to the axis X-X.
In some embodiments, base member 32 has a substantially planar shape. In other embodiments, base member 32 is substantially disc-shaped. In other embodiments, base member 32 is substantially conical. In other embodiments, base element 32 has an even more complex shape.
According to the invention, the passage 321 and the hole 322 are positioned and shaped so as to cause the fuel to flow from the lower end 22 in a region radially distant from the axis X-X.
According to the invention, the water separation and support means 3 also comprise a tubular member 31, the tubular member 31 extending from the base element 32 along the axis X-X into the central chamber 200.
The tubular member 31 has a substantially circular cross-section outlet conduit 310. In other words, the tubular element 31 surrounds said outlet duct. In particular, outlet conduit 310 is fluidly connected to head member 950 to allow filtered fuel to flow.
The peripheral wall 312 is adapted to support the inner wall of the filter membrane 2, which defines the central cavity 200. Preferably, the peripheral wall 312 is non-perforated and prevents the radial flow of fuel forced through the filter membrane 2.
Further, according to the present invention, the outer circumferential wall 312 and the inner circumferential wall 311 comprise at the top an outer sealing edge 312 'and an inner sealing edge 311' sealingly engaging the head member 950.
In other words, the outer circumferential wall 312 and the inner circumferential wall 311 comprise, in their portion remote from the base element 32, an outer sealing edge 312 'and an inner sealing edge 311', whereby a fluid connection with the head member 950 is obtained to ensure that filtered fuel flows towards the motor.
According to a preferred embodiment, outer and inner sealing edges 312 'and 311' receive respective gaskets or O-rings for sealing engagement with head member 950.
According to a preferred embodiment, the outer circumferential wall 312 and the inner circumferential wall 311 are made of a plastic material. In this way, the outer sealing edge 312 'and/or the inner sealing edge 311' may have a particular coupling profile that allows for a hermetic seal to be achieved with the header member without the use of additional gaskets.
Preferably, said engagement is obtained by mutual insertion in the axial direction, so as to subsequently obtain sealing between the components in the radial direction.
According to a preferred embodiment, both the outer sealing edge 312 'and the inner sealing edge 311' are positioned at a higher axial position than the upper end 21 of the filter membrane 2.
According to a preferred embodiment, said inner sealing edge 311 'is located at a higher axial position than the outer sealing edge 312'.
According to said embodiment, said inner sealing edge 311' comprises a circumferential lip adapted to engage in a radial direction a sealing surface provided on the head member 950.
According to a preferred embodiment, the inner sealing edge 311' comprises a circumferential lip adapted to engage in a radial direction a rod-like device 951 comprised in the head member 950. In particular, said circumferential lip extends centrally through channel 300 in a radial direction to engage rod-like device 951 and perform a sealing action.
Preferably, in the preferred embodiment, the inner sealing edge 311 'is located at a lower axial position than the outer sealing edge 312'.
Furthermore, according to the invention, the water separating and supporting means 3 comprise a separator element 35, through which the filtered fuel can pass for separating the water. In other words, thanks to the separator element 35, the desired effect of separating the water and any water-based crystals present in the fuel previously filtered by the filter membrane 2 is achieved.
According to the invention, said separator element 35 is located on the inlet side of the outlet duct 310. In this way, the fuel filtered by the filter membrane 2 and separated from the water by the separator element 35 flows into the outlet conduit 310.
According to the invention, the separator element 35 is housed on the base element 32 and/or on the inner circumferential wall 311 of the tubular member 31.
According to a preferred embodiment of the invention, the tubular member 31 has, on the inner peripheral wall 311, at least one through hole 3110 (i.e. a circumferential through hole extending along a circumferential portion and crossing in a radial direction with respect to the axis X-X) opening into the outlet duct 310, wherein the separator element 35 has the form of a hydrophobic grid located on said circumferential through hole 3110.
Preferably, there are a plurality of circumferential through holes 3110 in the circumferential direction, through which the filtered fuel flows in the radial direction 3110. Preferably, the circumferential through holes 3110 are angularly equidistant from each other. Preferably, there are also a plurality of circumferential through holes 3110 in the axial direction.
According to a preferred embodiment, the inner circumferential wall 311 has the form of a tubular frame (defining said circumferential through hole 3110) on which the separator element 35 is positioned.
According to a preferred embodiment, the base element 32 has at least one through hole 3200 leading to the outlet conduit 310 (i.e. an axial through hole having a substantially planar extension with respect to a two-dimensional plane orthogonal to the axis X-X and being passable in an axial direction parallel to the axis X-X), wherein the separator element 35 has the form of a hydrophobic grid located on said through hole 3200.
Preferably, the plurality of axial through holes 3200 are positioned with respect to the axis X-X, the filtered fuel flowing through said axial through holes 3200 in an axial direction parallel to the axis X-X. Preferably, the axial through holes 3200 are angularly equidistant from each other. Preferably, there are also a plurality of axial through holes 3200 in the radial direction. In other words, the base element has a plurality of through-holes through which the filtered fuel flows in the axial direction.
According to a preferred embodiment, the base element 32 has the form of a substantially planar frame (defining said circumferential through hole 3200) on which the separator element 35 is positioned.
According to a preferred embodiment of the invention, the base element 32 comprises sealing means 325, the sealing means 325 being adapted to sealingly engage a wall of the filter body 550, in particular the side wall 551 b. In other words, the base element 32 engages the filter body 550, dividing the filtration chamber 5500 into two separate chambers, the upper chamber where the solid filtration occurs and the lower chamber where the separation of the fuel from the water occurs (the water blocked by the separator element is collected in the water collection region 5500').
According to a preferred embodiment, the sealing means 325 sealingly engages the filter body 550 in a radial direction.
According to the invention, there are several modes of composing the water separating and supporting means 3 having the above-mentioned characteristics.
According to a preferred embodiment, the water separating and supporting means 3 consist of a primary part 3 'and a secondary part 3 ", the primary part 3' and the secondary part 3" being engageable with each other to define the outlet duct 310.
Preferably, the primary part 3' comprises an outer peripheral wall 312 and the secondary part 3 "comprises an inner peripheral wall 311.
According to a preferred embodiment, the main part 3' also comprises a base element 32.
According to an embodiment, the primary part 3' and the secondary part 3 "are mutually engaged to define a base element 32, wherein the primary part 3' comprises a primary base 32' engaged with the lower end 22 of the filter membrane 2, and the secondary part 3" comprises a secondary base 32 ".
According to a preferred embodiment, secondary base 32 "is sealingly connected to a bottom surface of primary base 32 'and is axially spaced from the bottom surface of primary base 32' to define a fluid passage in communication with outlet conduit 310.
According to a preferred embodiment, the primary part 3' and the secondary part 3 "are mutually engaged by mutual axial insertion.
According to a preferred embodiment, the primary part 3' and the secondary part 3 "are mutually engaged with each other by roto-translational insertion, for example by means of a threaded connection or a bayonet connection.
In other preferred embodiments, the primary part 3' and the secondary part 3 "are joined to each other by welding.
According to the above described embodiment, it is possible to provide a solution in which only the secondary part 3 "accommodates the separator element 35. In this way, the design and the associated production are particularly simplified.
The present invention also relates to a solid particulate and water fuel (preferably diesel) filtration system 900 including a head member 950 in fluid communication with the fuel circuit.
According to this embodiment, and as shown in the figures, the filter element group 1 is sealingly engaged to the head member 950, so that the latter receives the filtered fuel separated from the water, which flows into the outlet duct 310. Furthermore, the head member 950 comprises a rod-like device 951, for example a clearing bar and/or a support bar of a water level sensor, which rod-like device 951 is mounted along the axis X-X in the central channel 300 of the filter element group 1.
Preferably, as described above, the inner sealing edge 311' of the filter element pack engages the head member 950 or the rod-like device 951. Preferably, as described above, the outer sealing edge 312' of the filter element pack engages the head member to define the annular outlet conduit 310.
According to a preferred embodiment, head member 950 is sealingly engaged to filter body 550. Preferably, in effect, head member 950 is sealingly engaged to filter assembly 500.
In addition, according to a preferred embodiment in which the filter body 550 comprises a water collecting region 5500' in a region adjacent to the bottom wall 551a (i.e. positioned below the base element 32), said rod-like means 951 extend along the axis X-X to the water collecting region. In particular, rod-like device 951 extends in a length direction to engage bottom wall 551a and clearance hole 551a' provided in bottom wall 551 a. Preferably, in a preferred embodiment, extracting the filter assembly 500 from the header member 950 allows extracting the rod means 951 and simultaneously draining the water collected in the water collection area 5500'. In a preferred embodiment, rod-like device 951 may be withdrawn while filter assembly 500 is maintained in engagement with headpiece 950. Therefore, preferably, before subsequently extracting the filter assembly 500 from the head member 950, the rod-like means 951 are extracted and simultaneously the water collected in the water collection region 5500' is drained.
According to some preferred embodiments, the sealing engagement between outlet conduit 310 and head member 950 is maintained (in particular with a specially provided collar or collector) even in the configuration of extraction wand assembly 951; even in the configuration of the extraction wand 951, the dirty and clean sides of the filter assembly do not merge, but remain fluidly separated.
Innovatively, the above-described filter element assembly, filter assembly and fuel filter system fully achieve the objects of the present invention and overcome the typical disadvantages of the prior art.
Indeed, advantageously, the filter element group is suitable for optimizing the fuel filtering operation, while having reduced dimensions.
Advantageously, the filter element group has an optimized particle filtration of the fuel.
Advantageously, the filter membrane has a larger filtration surface than the annular filter media solution (radial cross).
Advantageously, the filter element group also optimizes the separation from water, presenting a wide hydrophobic surface that must be crossed by the fuel before it exits the filter element through the outlet duct.
Advantageously, the filter element group has water separating and supporting means, which have a simple geometry and are easy to manufacture. In particular, the coupling between the support means and the separator element is advantageously made without additional gaskets, thus reducing the cost of the solution.
Advantageously, the filter element group also uses the wall of the outlet duct to separate the water from the fuel.
Advantageously, the positioning of the axial filter (i.e. the filter membrane) upstream of the separator allows the water separation efficiency to be maximized, since the filtered fuel undergoes a directional change, which improves the pre-separation of the heavier components (e.g. water) dispersed in the fuel before reaching the separator.
Advantageously, the relative arrangement of the filter membrane and the hydrophobic separator makes it possible to perform a simple and effective coupling of the filter element group to the head piece, without affecting the possibility of mounting auxiliary, through-going rod-like components (such as sensors or clearing means) for the operation of the filtering device in the inner cavity of the filter.
Advantageously, the filter element assembly can be installed in existing filter assemblies to improve filtration and water separation performance.
Advantageously, a filtering membrane of the filtering material type with coalescing properties facilitates (and in some cases uses the effect of gravity) the action of separating the water from the fuel.
It is clear that a person skilled in the art can modify the filter element group, the filter assembly and the fuel filtration system described above to meet contingent requirements, all of which are included within the scope of protection defined by the following claims.
Claims (16)
1. A filter element group (1) of a filter assembly (500) of a fuel filtration system (900) of solid particles and water, the fuel preferably being diesel, wherein the filtration system (900) comprises a headpiece (950), to which headpiece (950) the filter assembly is engageable, wherein the filter element group (1) is housed in a filter body (550) of the filter assembly (500), and wherein the filter element group (1) extends along an axis (X-X) and comprises:
a filter membrane (2) through which the fuel can pass in an axial direction, the filter membrane (2) extending in height parallel to the axis (X-X) between an upper end (21) and a lower end (22), wherein the filter membrane (2) has an annular shape and defines a central cavity (200) at the axis (X-X);
a water separation and support device (3) supporting the filter membrane (2) to the filter body (550) and engageable by the head member (950), the water separation and support device (3) comprising:
i) a base element (32) engaged with said lower end (22) of said filter membrane (2), wherein said base element (32) has a main extension substantially radial to said axis (X-X), and wherein said base element (32) has channels (321) and/or holes (322) through which said filtered fuel flowing from said lower end (22) flows;
ii) a tubular element (31) extending from the base element (32) along the axis (X-X) into the central cavity (200), wherein the tubular element (31) has an outlet duct (310) having a substantially annular cross-section defined by an outer peripheral wall (312) and an inner peripheral wall (311), the outer peripheral wall (312) engaging an inner wall of the filter septum (2), the inner peripheral wall (311) defining a central passage (300) along the axis (X-X), wherein the outer peripheral wall (312) and the inner peripheral wall (311) comprise, respectively, at the top, an outer sealing edge (312') and an inner sealing edge (311') sealingly engaging the head member (950);
iii) a separator element (35), through which the filtered fuel can pass for separating from the water, wherein the separator element (35) is accommodated on an inner circumferential wall (311) of the base element (32) and/or the tubular element (31) such that the fuel filtered by the filter membrane (2) and separated from the water by the separator element (35) flows in the outlet conduit (310).
2. The filter element group (1) according to claim 1, wherein the outer sealing edge (312') and the inner sealing edge (311') are both located at a higher axial position than the upper end (21) of the filter membrane (2).
3. The filter element group (1) according to claim 2, wherein the inner sealing edge (311') is located at a lower axial position than the outer sealing edge (312').
4. A filter element group (1) according to claim 1 or 2, wherein the inner sealing edge (311') comprises a circumferential lip adapted to engage in a radial direction a rod-like means (951), which rod-like means (951) extend and are located at the axis (X-X), included in the head member (950), such as a clearing bar and/or a support bar for the water level sensor.
5. The filter element group (1) according to any of the previous claims, wherein the tubular element (31) has on the inner peripheral wall (311) a plurality of circumferential through holes (3110) leading to the outlet duct (310), wherein the separator element (35) has the form of a hydrophobic net on the circumferential through holes (3110).
6. The filter element group (1) according to any of the previous claims, wherein the base element (32) has a plurality of axial through holes (3200) leading to the outlet duct (310), wherein the separator element (35) has the form of a hydrophobic net on the axial through holes (3200).
7. The filter element group (1) according to any of the preceding claims, wherein the base element (32) comprises sealing means (325), the sealing means (325) being adapted to sealingly engage the wall of the filter body (550).
8. The filter element group (1) according to any of the previous claims, wherein the water separating and supporting means (3) consist of a primary part (3') and a secondary part (3 ") reciprocally sealingly engageable so as to define the outlet duct (310), wherein the primary part (3') comprises the outer peripheral wall (312) and the secondary part (3") comprises the inner peripheral wall (311).
9. The filter element group (1) according to claim 8, wherein the main part (3') further comprises the base element (32).
10. The filter element group (1) according to claim 8, wherein the primary part (3') and the secondary part (3 ") are mutually engaged to define the base element (32) in which the primary part (3') comprises a primary base (32') engaged with the lower end (22) and the secondary part (3") comprises a secondary base (32 ").
11. The filter element group (1) according to any of claims 8 to 10, wherein the primary part (3') and the secondary part (3 ") are mutually engaged by mutual axial insertion and/or by roto-translational insertion.
12. A filter assembly (500) of a fuel filtration system (900) for filtering solid particles and water from diesel fuel, preferably diesel fuel, the filter assembly (500) comprising:
i) a filtering body (550) extending axially along an axis (X-X) and comprising:
a cup-shaped element (551) comprising a bottom wall (551a), a side wall (551b) and a cup-shaped opening (5510), the cup-shaped opening (5510) being opposite the bottom wall (551a) and being delimited peripherally by the side wall (551 b);
a cover element (552) closing said cup-shaped opening (5510) and comprising, at said axis (X-X), a cover opening (5520) through which said fuel after filtration flows (5520);
ii) a filter element group (1) housed in a filter body (550) according to any of the preceding claims;
wherein the entire filter assembly (500) is removably secured to a header member (950) included in the fuel filtration system (900).
13. A fuel filtration system (900) for filtering solid particles and water from diesel fuel, preferably diesel fuel, the fuel filtration system (900) comprising a head member (950) in fluid connection with a fuel circuit, wherein the filter core set (1) is sealingly engaged to the head member (950) such that the head member (950) receives filtered fuel separated from water flowing into an outlet conduit (310), wherein the head member (950) further comprises a rod-like means (951), such as a clearing bar and/or a support bar of the water level sensor, the rod-like means (951) extending longitudinally along the axis (X-X) within a central channel (300) of the filter core set (1).
14. The fuel filter system (900) of claim 12, wherein said inner sealing edge (311') engages said rod-like device (951).
15. The fuel filtration system (900) of claim 13 or 14 and claim 12, wherein the head member (950) is sealingly engaged to the filter body (550).
16. The fuel filter system (900) according to any of the claims 13 to 15, wherein the filter body (550) comprises, in a region adjacent to the bottom wall (551a), a water collection region (5500') below the base element (32), and the rod-like means (951) extend along the axis (X-X) to the water collection region, possibly engaging with the bottom wall (551a) and a clearance hole (551a') provided on the bottom wall (551 a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811302433.7A CN111140416A (en) | 2018-11-02 | 2018-11-02 | Filter element group for filtering fuel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811302433.7A CN111140416A (en) | 2018-11-02 | 2018-11-02 | Filter element group for filtering fuel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111140416A true CN111140416A (en) | 2020-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811302433.7A Pending CN111140416A (en) | 2018-11-02 | 2018-11-02 | Filter element group for filtering fuel |
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| Country | Link |
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| CN (1) | CN111140416A (en) |
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