WO2018010917A1 - Dispositif de filtration de liquide - Google Patents

Dispositif de filtration de liquide Download PDF

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Publication number
WO2018010917A1
WO2018010917A1 PCT/EP2017/064995 EP2017064995W WO2018010917A1 WO 2018010917 A1 WO2018010917 A1 WO 2018010917A1 EP 2017064995 W EP2017064995 W EP 2017064995W WO 2018010917 A1 WO2018010917 A1 WO 2018010917A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter element
flow guide
filter device
flow
guide elements
Prior art date
Application number
PCT/EP2017/064995
Other languages
German (de)
English (en)
Inventor
Michael Braunheim
Original Assignee
Mahle International Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mahle International Gmbh filed Critical Mahle International Gmbh
Publication of WO2018010917A1 publication Critical patent/WO2018010917A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
    • B01D35/147—Bypass or safety valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
    • B01D29/56—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection
    • B01D29/58—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection arranged concentrically or coaxially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
    • B01D29/90—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding
    • B01D29/902—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding containing fixed liquid displacement elements or cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/29—Filter cartridge constructions
    • B01D2201/291—End caps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/31—Other construction details
    • B01D2201/316—Standpipes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/34—Seals or gaskets for filtering elements
    • B01D2201/342—Axial sealings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/40—Special measures for connecting different parts of the filter
    • B01D2201/4038—Special measures for connecting different parts of the filter for connecting at least two filtering elements together

Definitions

  • the present invention relates to a liquid filter device having at least one filter element arranged in a housing and a bypass valve according to the preamble of claim 1.
  • the invention also relates to a filter element, in particular for such a filter device.
  • a liquid filter device with a ring filter element which has a filter body arranged between two end disks for filtering a liquid and a venting device arranged in or on the end disk for passing gas collected in a raw fluid region.
  • the venting device comprises one or a plurality of fluid flow channels for creating a flow resistance, wherein a fluid flow channel forces at least one flow direction change of the gas.
  • a fuel supply system with a delivery unit and a leading from the delivery unit to an internal combustion engine pressure line is known in which a check valve is arranged and a downstream of the check valve branching from the pressure line branch line in which a pressure relief valve is arranged. If an overpressure occurs in the pressure line, it can be drained via the pressure limiting valve, without having to fear a leakage of fuel.
  • bypass valves known from the state of the art are said to have - as mentioned at the beginning - usually a valve body resting on a valve seat and prestressed against this valve seat, whereby the bypass valve itself already comprises several parts that must be mounted. Depending on the installation position, this requires a complex installation process that should not be underestimated.
  • the present invention therefore deals with the problem of providing for a liquid filter device of the generic type an improved or at least one alternative embodiment, which in particular has a structurally simple and inexpensive bypass valve.
  • the present invention is based on the general idea, a bypass valve no longer known as known from the prior art, with a valve seat and a biased valve body, but with at least one permanently open bypass opening, which is traversed in response to a flow rate of the liquid or Not. This means that it is not flowed through in normal operating conditions due to a then prevailing higher or normal flow velocity, but only at a reduced flow rate, ie, for example, poor or not at all continuous filter element.
  • the filter device according to the invention may have different embodiments, for example arranged on an end plate of the filter element bypass valve and flow guide, arranged at a Venturiegeometrie in an inflow passage by-pass valve or arranged in the region of dynamic pressure elements or orifices by-pass valve. All embodiments have in common that the at least one the bypass valve associated and permanently open bypass opening in normal operation at this flow rate normal or no backward bypass flow allowed, in a clogged filter element or even in cold outdoor temperatures, however, in which reduces the flow rate is, a bypass of the filter element allows.
  • corresponding flow guide elements are arranged in a (flow-averted) region with reduced pressure p 2 , whereby no flow from a raw side to a clean side through the bypass opening takes place during normal operation of the liquid filter device, but only if this Flow conditions, for example due to increased toughness and / or too low a temperature of the liquid require.
  • the liquid filter device according to the invention has at least one film arranged in a housing. terelement, wherein the filter element separates a raw side of a clean side. Also provided is the aforementioned bypass valve, which connects the raw side with the clean side.
  • this bypass valve now has flow-guiding elements which cause a flow deflection of the liquid during operation of the liquid-filtering device and wherein the previously mentioned permanently open bypass opening is arranged in a flow shadow, ie on a side facing away from the upstream side, of at least one of these flow-guiding elements.
  • the bypass valve according to the invention is thus connected via a special flow at different operating conditions. In cold outside temperatures, for example, in which the liquid to be filtered has an increased toughness, that is, for example, at a start of an internal combustion engine, the liquid has a comparatively low flow velocity.
  • the liquid to be filtered has reduced toughness, ie a reduced viscosity, and thus a higher flow velocity, so that it is deflected by the flow guide elements in such a way that in the flow shadow or on a side of the respective flow guide element facing away from the flow A negative pressure is created, which prevents a passage of the unfiltered liquid from the raw side to the clean side and, in fact, even by the lower compared to the inflow side pressure p 2 (negative pressure) sucked like a suction jet pump via the bypass openings filtered liquid from the clean side.
  • Negative pressure means only a p- to the pressure on the upstream side by a differential pressure ⁇ on the downstream side, that is, in the flow shadow, reduced pressure P2.
  • the flow passages designed according to the invention and the bypass ports arranged according to the invention are constructively the same all the time, ie permanently open, but a bypass flow from the raw to the clean side takes place only if the toughness of the liquid to be filtered or its Temperature and the resulting pressure in the bypass opening allowed. In normal operation, however, no bypass flow or even depending on the size of the resulting negative pressure p 2 is a backward bypass flow from the clean to the raw side.
  • the filter element is designed as a ring filter element and the flow guide elements and the at least one bypass opening are arranged on an end disk of this ring filter element.
  • a ring filter element can be used, for example, in a normal lubricant or fuel filter, wherein the flow guide are comparatively easy to manufacture together with the respective end plate in a common plastic injection molding and thus formed integrally with the end plate.
  • the filter element can also be designed as an end separator, for example for separating off water, in which case the flow guiding elements and the at least one bypass opening are arranged on a housing wall of the end separator. The bypass opening would in this case connect a raw and a clean side of the final separator.
  • this has a ring filter element and a coaxially arranged Endabscheider, wherein between the ring filter element and the Endabscheider an annular space is arranged and wherein on one of the end plate of the ring filter element side facing the housing wall, the flow guide and the at least one Bypasso réelle are arranged.
  • the flow guide elements are expediently designed as contours curved in the shape of a spiral segment which, in the operating state and at normal operating temperatures, force a helical flow deflection of the liquid to be filtered.
  • the permanently open bypass openings are arranged, it being conceivable that an associated bypass opening or even only on some or on a single flow guide (s) an associated bypass opening is arranged per flow guide.
  • the at least one bypass opening is arranged in a region in which a negative pressure prevails in the normal operating state of the filter device. This negative pressure depends on the flow rate of the liquid to be filtered and thus indirectly on its temperature, since the temperature determines the viscosity of the liquid and thus also the flow velocity or flow rate of the liquid.
  • the at least one bypass opening has a slot shape, which is oriented to the orientation of the associated flow guide.
  • Such slot-like bypass opening is comparatively easy to produce by injection molding, although, of course, also round bypass openings are conceivable.
  • the flow guide elements are arranged on an upper end disk, in which case the raw side lies between a cover of a filter device and the upper end disk.
  • the present invention is further based on the general idea to provide a filter element, in particular for the previously described liquid filter device, which separates a raw side from a clean side and which has such a bypass valve with corresponding flow guide elements, which cause a flow deflection of the liquid during operation of the filter element and wherein in a flow shadow or on a side facing away from the flow of at least one flow guide a permanently open bypass opening is arranged.
  • Such a filter element may be formed, for example, as a ring filter element or as Endabscheider or as a combined ring filter element with coaxially arranged Endabscheider, in the latter case between the ring filter element and the Endabscheider an annular space is arranged and on one of the end plate of the ring filter element side facing the housing wall, the flow guide elements and the at least one bypass opening are arranged.
  • the filter device has a venturi geometry in an inflow channel on the raw side, the at least one permanently open bypass opening of the bypass valve being arranged in the region of a constriction of the venturi geometry and connected to an outflow channel on the clean side.
  • the filter device has a dynamic pressure element in a discharge channel on the clean side, wherein the at least one permanently open bypass opening of the bypass valve in the region of the dynamic pressure element is arranged and connected to an inflow channel on the raw side, or that the filter device tion in an inflow channel on the raw side has a diaphragm, wherein the at least one permanently open bypass opening of the bypass valve is arranged in the region of the diaphragm and connected to a discharge channel on the clean side.
  • the bypass valve and the associated bypass opening is moved away from the filter element in a housing of the filter device, whereby the use of ordinary, cost-effective filter elements is possible.
  • the use of the structurally simple, inexpensive and functional bypass valve is also feasible here.
  • bypass valve compared to known from the prior art bypass valves structurally much simpler and thus more cost-effective, namely a simple opening, and compared to those from the state known bypass valves also requires no installation effort.
  • the function of the bypass valve according to the invention is still always guaranteed, which represents a significant increase in reliability compared to known from the prior art bypass valves, in which, for example, in a spring break the bypass valve is constantly open.
  • FIG. 1 is a sectional view through a filter element according to the invention
  • FIG. 2 shows a view of a raw side of a filter element according to the invention with flow guide elements and bypass openings
  • FIG. 3 is a view as in FIG. 2, but a view from a clean side
  • Fig. 6 is a sectional view taken along the cutting plane A-A when heated
  • FIG. 7 shows a sectional view through a further embodiment of a filter device according to the invention with a bypass valve arranged in the region of a venturi geometry
  • 8 shows a sectional illustration through a further embodiment of a filter device according to the invention with a dynamic pressure element arranged in a discharge channel on the clean side
  • FIG. 9 is a sectional view through a further embodiment of a filter device according to the invention with arranged in an inflow channel on the raw side panel,
  • FIG. 10 is a sectional view through a further embodiment of a filter device according to the invention with arranged in a discharge channel on the clean side aperture.
  • a liquid filter device 1 which can be designed, for example, as a fuel filter, as a hydraulic filter or as an oil filter, has a housing 2 in which a filter element 3 is arranged.
  • the filter element 3 separates a raw side 4 from a clean side 5.
  • a bypass valve 6, which allows temperature dependent or depending on the flow velocity of the liquid 8 a bypass flow from the raw side 4 to the clean side 5.
  • the bypass valve 6 according to FIGS. 1, 2 and 4 to 6 has flow guiding elements 7, which cause a flow deflection of the liquid 8 during operation of the liquid filter device 1, wherein at least one in a flow shadow 9 or on a side facing away from flow Flow guide 7 a permanently open bypass opening 1 1 is arranged.
  • the filter element 3 may be formed as a ring filter element 14, in which case the flow guide 7 and the at least one bypass opening 1 1 are arranged on an end plate 16 of the ring filter element 14.
  • the filter element 3 is designed as Endabscheider 12 and the flow guide 7 and the at least one bypass Opening 1 1 are arranged on a housing wall 13.
  • the filter element 3 has a ring filter element 14 and a coaxially arranged end separator 12 (see Fig.
  • the flow guide elements 7 are preferably formed integrally with the end plate 16 or the housing wall 13 of the Endabscheiders 12 and thereby comparatively easy to produce (see also Fig. 4 to 6).
  • the flow guide elements 7 are arranged both on the housing wall 13 of the end separator 12 and on an end disk 16 of the ring filter element 14, the bypass openings 11 being exclusively on the housing wall 13 of the Endabscheiders 12 are provided.
  • the end disk-side flow guide elements 7 are arranged offset in the circumferential direction to the housing wall-side flow guide elements 7.
  • bypass opening 1 1 has a slot shape, which is based on the orientation of the flow guide 7.
  • the flow guide elements 7 are formed as spiral segment-shaped curved contours, the at least one bypass opening 1 1 arranged in a region in which during operation of the filter device 1 at operating temperature, that is not during a cold start phase, a negative pressure p 2 prevails.
  • Negative pressure means to only a pressure pi at the inlet side 17 by a pressure difference ⁇ on the downstream side 10, that is, in the flow shadow 9, reduced pressure P2.
  • FIG. 4 upper half of the picture, it can be seen that the flow guide elements 7 are formed as contours curved in the shape of a circle segment, while they form a closed ring 18 in the lower half of the picture.
  • the bypass valve 6 opens depending on the flow rate of the liquid to be filtered. 8
  • a negative pressure is p 2
  • the 1 even may cause a back flow of the clean side 5 to the raw side 4 at the arranged there Bypasso réelle 1, as shown in the right half of Fig. 2 and in Fig. 6 can be seen.
  • the bypass opening 1 1 thus meets with viscous liquid 8 and thus at low flow rate, for example in cold weather or in a cold start phase, the required bypass function, while at normal operating temperature and thus faster flowing liquid 8 generates a circulatory function via the bypass opening 1 1 causes an at least slight return flow of the liquid 8 from the clean side 5 to the raw side 4.
  • FIGS. 7 to 10 further embodiments of the liquid filter device 1 according to the invention are shown, likewise with a housing 2, in which a filter element 3 is arranged.
  • the filter element 3 also separates The raw side 4 of the clean side 5.
  • a bypass valve 6, which allows depending on the flow rate of the liquid 8, a bypass flow from the raw side 4 to the clean side 5.
  • the flow of the liquid 8 in the normal operating state is shown with a thicker, interrupted arrow, while the bypass flow is shown with a thinner continuous arrow.
  • an opposite bypass flow is shown with a thin, interrupted arrow, which shows a backward bypass between outflow 22 and inflow 19 during normal operation.
  • a Venturigeometrie 20 is disposed in an inflow 19 on the raw side 4, wherein the at least one permanently open bypass opening 1 1 of the bypass valve 6 in the region of a constriction 21 of Venturigeometrie 20 is arranged and connected to a discharge channel 22 on the clean side 5.
  • a dynamic pressure element 23 is arranged in the discharge channel 22 on the clean side 5, wherein the at least one permanently open bypass opening 1 1 of the bypass valve 6 in the region of the dynamic pressure element 23, that is, more precisely, upstream of the same, arranged and the inflow channel 19 is connected to the raw side 4.
  • a diaphragm 24 is arranged in the inflow channel 19 on the raw side 4, wherein the at least one permanently open bypass opening 1 1 of the bypass valve 6 in the region of the aperture 24, that is, more precisely, downstream in a flow shadow of the Aperture, placed and connected to the discharge channel 22 on the clean side 5.
  • the aperture 24 can of course also be arranged in the outflow channel 22 on the clean side 5, in which case the aperture 24 at least one permanently open Bypasso réelle 1 1 of the bypass valve 6 is arranged in the region of the aperture 24 and connected to an inflow 19 on the raw side 4.
  • bypass valve 6 is relatively simple and without a previously required spring, a previously required valve body and a previously required valve seat is constructed and thereby not only cheaper, but also in terms of its Function is made more reliable.
  • a standardized filter element can be used, since the bypass valve 6 is integrated in the housing 2.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtration Of Liquid (AREA)

Abstract

L'invention concerne un dispositif de filtration de liquide (1) destiné à filtrer un liquide (8), ce dispositif comprenant au moins un élément filtrant (3) qui est agencé dans un boîtier (2) et qui sépare un côté non filtré (4) d'un côté filtré (5). Le dispositif comprend par ailleurs une soupape de dérivation (6). L'invention se caractérise en ce que la soupape de dérivation (6) présente au moins une ouverture de dérivation (11) ouverte de manière permanente qui est agencée de sorte que l'écoulement passe ou non par celle-ci en fonction de la vitesse d'écoulement du liquide (8).
PCT/EP2017/064995 2016-07-11 2017-06-20 Dispositif de filtration de liquide WO2018010917A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016212591.5 2016-07-11
DE102016212591.5A DE102016212591A1 (de) 2016-07-11 2016-07-11 Flüssigfiltereinrichtung

Publications (1)

Publication Number Publication Date
WO2018010917A1 true WO2018010917A1 (fr) 2018-01-18

Family

ID=59152864

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/064995 WO2018010917A1 (fr) 2016-07-11 2017-06-20 Dispositif de filtration de liquide

Country Status (2)

Country Link
DE (1) DE102016212591A1 (fr)
WO (1) WO2018010917A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11209079B2 (en) 2018-05-01 2021-12-28 Textron Innovations Inc. Bypass block for unregulated gearboxes
DE102019004927B3 (de) * 2019-07-15 2021-01-14 Daimler Ag Fluidfilter für einen Kraftwagen und Filterkartusche für einen Fluidfilter
DE102019004926B3 (de) * 2019-07-15 2020-12-24 Daimler Ag Fluidfilter für einen Kraftwagen und Filterkartusche für einen solchen Fluidfilter

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4783266A (en) * 1987-08-10 1988-11-08 Titch Duwayne E Filter for removing particles from a fluid, and method therefore
US20090218295A1 (en) * 2008-02-28 2009-09-03 Verdegan Barry M Filter with Flow Surge Protection
DE102008040924A1 (de) 2008-08-01 2010-02-04 Robert Bosch Gmbh Druckbegrenzungsventil für ein Kraftstoffversorgungssystem
WO2013121004A1 (fr) * 2012-02-16 2013-08-22 Emitec Gesellschaft Für Emissionstechnologie Mbh Cartouche de filtration pour dispositif d'apport d'agent réducteur
DE102012012542A1 (de) 2012-06-26 2014-01-02 Mann+Hummel Gmbh Flüssigkeitsfilter und Filteranordnung

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19646248A1 (de) * 1996-11-08 1998-05-14 Aka Armaturen Rohrverschraubun Ölfilter für Ölbrenner einer Heizungsanlage
DE202005014451U1 (de) * 2005-09-12 2007-02-01 Mann + Hummel Gmbh Kraftstofffilter
DE102005043968B4 (de) * 2005-09-15 2022-10-06 Robert Bosch Gmbh Filtereinrichtung mit einer Durchgangsöffnung zum Abführen von Luft
DE202007000746U1 (de) * 2007-01-12 2008-05-21 Mann+Hummel Gmbh Kraftstofffilter
DE102014209595A1 (de) * 2014-05-20 2015-11-26 Mahle International Gmbh Flüssigkeitsfilter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4783266A (en) * 1987-08-10 1988-11-08 Titch Duwayne E Filter for removing particles from a fluid, and method therefore
US20090218295A1 (en) * 2008-02-28 2009-09-03 Verdegan Barry M Filter with Flow Surge Protection
DE102008040924A1 (de) 2008-08-01 2010-02-04 Robert Bosch Gmbh Druckbegrenzungsventil für ein Kraftstoffversorgungssystem
WO2013121004A1 (fr) * 2012-02-16 2013-08-22 Emitec Gesellschaft Für Emissionstechnologie Mbh Cartouche de filtration pour dispositif d'apport d'agent réducteur
DE102012012542A1 (de) 2012-06-26 2014-01-02 Mann+Hummel Gmbh Flüssigkeitsfilter und Filteranordnung

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