WO2018072868A1 - Filter cartridge for gearbox oil filtration - Google Patents
Filter cartridge for gearbox oil filtration Download PDFInfo
- Publication number
- WO2018072868A1 WO2018072868A1 PCT/EP2017/001189 EP2017001189W WO2018072868A1 WO 2018072868 A1 WO2018072868 A1 WO 2018072868A1 EP 2017001189 W EP2017001189 W EP 2017001189W WO 2018072868 A1 WO2018072868 A1 WO 2018072868A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- filter
- cartridge according
- shell
- filter cartridge
- filtration
- Prior art date
Links
- 238000001914 filtration Methods 0.000 title claims abstract description 17
- 239000000463 material Substances 0.000 claims description 23
- 239000003921 oil Substances 0.000 claims description 19
- 230000005540 biological transmission Effects 0.000 claims description 18
- 239000012530 fluid Substances 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 238000007872 degassing Methods 0.000 claims description 5
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 5
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000012208 gear oil Substances 0.000 claims description 3
- 239000006249 magnetic particle Substances 0.000 claims description 3
- 239000002985 plastic film Substances 0.000 claims description 3
- 229920002457 flexible plastic Polymers 0.000 claims description 2
- -1 polyethylene terephthalate Polymers 0.000 claims description 2
- 238000000967 suction filtration Methods 0.000 claims description 2
- 235000015250 liver sausages Nutrition 0.000 claims 1
- 239000000706 filtrate Substances 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 125000006850 spacer group Chemical group 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 240000006829 Ficus sundaica Species 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 239000002923 metal particle Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 238000011086 high cleaning Methods 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
- B01D36/001—Filters in combination with devices for the removal of gas, air purge systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/0031—Degasification of liquids by filtration
-
- 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
- B01D29/11—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
- B01D29/114—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 arranged for inward flow filtration
-
- 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
- B01D29/52—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 parallel connection
- B01D29/54—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 parallel connection arranged concentrically or coaxially
-
- 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
- B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
- B01D35/027—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks rigidly mounted in or on tanks or reservoirs
-
- 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
- B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
- B01D35/027—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks rigidly mounted in or on tanks or reservoirs
- B01D35/0273—Filtering elements with a horizontal or inclined rotation or symmetry axis submerged in tanks or reservoirs
-
- 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
- B01D35/06—Filters making use of electricity or magnetism
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
- B01D39/1692—Other shaped material, e.g. perforated or porous sheets
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0402—Cleaning of lubricants, e.g. filters or magnets
- F16H57/0404—Lubricant filters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/04—Additives and treatments of the filtering material
Definitions
- the invention relates to a filter cartridge for transmission oil filtration, which can be used in the bottom region of a transmission housing, with at least two filter elements, which differ in their filtration fineness.
- a filter device for the transmission oil In this regard, DE 10 2007 023 641 B4 shows a filter device in the form of a filter cassette of the type mentioned, which operates as a suction filter. The design as a suction filter is characterized in
- Pressure oil filter devices which usually operate in a bypass flow and are mounted externally within the transmission housing or on the transmission housing, have connections with hose or pipe connections that run outside of the transmission, resulting in greater space and weight.
- overpressure protection in the pressure oil filter circuit usually by means of a bypass valve, is required.
- a flat web of a filter fleece is provided as filter elements. These tracks are in the vertical direction, ie, offset in the direction of the suction flow from the bottom of the cartridge to each other, the webs are held both by spacers between them at a vertical distance from each other, and held by spacers at a distance from the cassette bottom and the cassette top wall forming are.
- the invention has the object to provide a filter cartridge of the type mentioned is available, which is characterized both by a particularly low height and high filtration efficiency. According to the invention this object is achieved by a filter cartridge having the features of claim 1 in its entirety.
- an essential feature of the invention is that the filter elements are at least partially, preferably completely in a common plane.
- the filter elements are at least partially, preferably completely in a common plane.
- flat webs of filter fleece filter elements provide, as they have for high filter performance usually multilayer filter media, for example in the form of a filter mat with multiple pleated layers.
- multilayer filter media for example in the form of a filter mat with multiple pleated layers.
- this makes it possible to achieve large filter surfaces and thus high cleaning efficiency at low ⁇ and low suction pressure.
- the filter material of the filter elements surrounds an inner filter cavity, wherein the filter material is guided on deviating from the circular path such that results in a flat-stretched outer shape for the filter element.
- Filter elements in which the filter material surrounds an inner filter cavity are common in a circular cylindrical shape as so-called filter cartridges and are widely used because of their advantageous properties.
- the advantages of such filter elements can be used in a flat-pressed, wide design, in which the inner filter cavity has the shape of a wide and flat oval, as well as the outside of the filter material, even in the filter cartridge according to the invention.
- a filter element for a coarse filtration with a filter fineness of about 50 ⁇ and a filter element for a fine filtration with a filter fineness of about 10 / m can be provided.
- the filter cassette has an outer casing, on the upper side of which at least one connecting piece is arranged, wherein a filter element is located on both sides of the respective nozzle. If the coarse filter and the fine filter have different dimensions measured in the horizontal direction, the respective connecting piece is located outside the central area of the filter cassette.
- the outer shell has the shape of a shallow shell with a peripheral edge extending from the upper side having the respective connecting piece, which surrounds the shell bottom, which is closed except for a fluid-permeable inflow region.
- the shell bottom can be formed by a film of a plastic material, such as polyethylene terephthalate (PET), which has a localized perforation forming the inflow region.
- PET polyethylene terephthalate
- Airborne levels of air which have been found to be up to 7%, have a negative impact on performance.
- sucking in air through the suction oil pump there is a risk of damage due to cavitation.
- air content in the oil of the converter deteriorates the controllability and can lead to jerking during the gear change.
- the arrangement is such that the outer shell of the filter cartridge has a peripheral edge of the tray to form a space surrounding outer edge, that the gap over most of its length through slots to the top of Outer shell is open and that in the intermediate space a ring of coalescing, degassing the gear oil effecting material is provided which projects outwardly from the intermediate space and stands up in the functional position on the bottom of the gear housing.
- the air separated from the coalescer standing in the oil rises in the space between the shell peripheral edge and the shell outer edge and exits through the slots of the top of the outer shell, so that the suction oil pump sucks largely air-free oil.
- the arrangement can be made such that a fluid path to the upstream side of both filter elements is formed by the inflow region of the shell bottom and that for a parallel suction filtration through both filter elements whose outflow sides are connected to a common pump connection piece or with its own pump connection piece.
- the fine filter can advantageously be designed with a filter surface which is larger than the coarse filter.
- a two-circuit filtration may be provided, the downstream side being connected to a pump connection for operation of the coarse filter as a suction filter, and its inflow side being connected to a return connection for operation of the fine filter as a return filter, and the outflow side of the fine filter connected to the pump port. Since the return flow is fed to the fine filter via the return connection at a return oil pressure, which can be up to 5 bar in operation, and the filtrate from the return filter (fine filter) is fed into the pump connection and thus directly into the suction line of the pump the suction pressure.
- Pump connection and return connection can be formed by separate fluid paths in a common connection piece, or it can be provided own connection piece for pump and return connection.
- the film forming the bottom of the tray may have a coating with magnetic particles, for example in the form of a lacquer.
- a particularly flat design of the filter cartridge can be realized if the outer shell is formed of a flexible plastic film and a fluid-permeable drainage layer is provided in the space between the filter material of the filter elements and the outer shell. In this construction, in which inner fluid channels are formed by the drainage layer, the outer shell may have a shape which conforms directly to the drainage layer, so that the filter cassette has the lowest possible height.
- Fig. 1 is a perspective oblique view of an embodiment of the filter cartridge according to the invention.
- FIG. 2 shows a schematic simplified drawn vertical section of the embodiment with centrally extending cutting plane.
- Figure 3 is a perspective view oblique view of the bottom of the shell of the outer shell of the embodiment, wherein the shell bottom is omitted.
- Fig. 4 is a of FIG. 3 corresponding bottom view with attached
- Fig. 5 is one of the Fig. 2 corresponding schematically simplified
- FIG. 6 is a perspective oblique view, seen on the upper side, of a third embodiment of the filter cassette according to the invention and FIG Fig. 7 is a sectional view corresponding to Fig. 5 of the third embodiment of Fig. 6, wherein a degassing is omitted.
- the filter cartridge according to the invention has an outer shell 2 which is injection-molded from a plastic material and which, s. Fig. 1, which has the shape of a flat Irelandeckquarders with rounded corners.
- On the planar upper side 6 is located centrally between the long sides, but one of the narrow sides closer than the other narrow side te, a connecting piece 8.
- an outer edge 10 which, like the top 6, is planar and at the embodiments shown has a vertical height which corresponds to about one tenth of the length of the long sides.
- an inner shell is formed in the outer shell 2 by an inner peripheral edge 12 which extends at a distance within the outer edge 10 and parallel to this, which open at the bottom is and in, s.
- Fig. 2 two filter elements 16 and 18 are added.
- FIG. 3 shows the view from below into the opened shell without filter elements 16, 18 installed therein, while FIG. 4 shows the shell closed by a shell bottom 20.
- This tray bottom 20 is formed by a plastic film, such as PET, which is welded to a circumferential edge strip 22 of the inner calculatorsran- 12.
- the shell base 20, which otherwise closes the shell, has a perforation region 24 extending parallel to the narrow sides, which, see FIG. Fig. 2 is aligned with the connecting piece 8 and forms an inflow region for the filtration operation.
- a circumferentially extending collar 26 of coalescing material for example in the form of a wire mesh, is arranged such that it protrudes beyond the underside of the shell bottom 20 and when inserted.
- Construction of the filter cartridge is on the bottom portion of the transmission housing in the oil and causes a degassing. Exposed air rising in the intermediate space 14 exits via slots 28 located at the top 6.
- the filter element 16 is a coarse filter with a filter fineness of 50 ⁇
- the filter element 18 is a fine filter with a filter fineness of 10 ytvm.
- the axial length of the filter element 18 is approximately 2.8 times the filter element 16.
- the filter elements 16, 18 have as a filter medium a multilayer filter mat which surrounds an inner filter cavity 30 or 32 and between end caps 34 and 36 attached to shoulders 38, which, see FIG. Fig. 2, are formed on the inside of the top 6, are welded to the outer shell 2.
- the connecting piece 8 is connected to a suction oil pump of the transmission.
- the oil enters via the perforation region 24 in inflow spaces 40 (FIG. 3) which are formed between a dividing wall 42 and strips 44 against which the foil of the shell bottom 20 rests.
- the oil passes to the outside of the filter elements 16 and 18.
- the filter material 48 is located between the outside of the filter material 48 and the adjacent wall of the outer housing 2 and the shell bottom 20 forming film each have a drainage läge 50 in the form of a fluid-permeable foam material, such as Dimicron.
- the filtrate from the inner filter cavity 30 or 32 of the coarse filter element 16 or fine filter element 18, as indicated in FIG. 2 with outflow arrows 52 flows out of the connecting piece 8.
- the foil forming the shell bottom 20 has a coating with magnetic particles.
- the filter material is circular cylindrical, the filter material 48 is flattened, so to speak, in the filter elements 16, 18 according to the invention, ie, the inner filter cavity 30 and 32 as well Outside of the filter material 48 have the shape of a very flat oval, wherein the outside of the filter material 48 extends substantially over the entire width of the narrow side of the filter cartridge. With a large available filter surface, therefore, a flat construction of the outer shell 2 can be realized.
- the arrangement of the drainage layers 50 on the outside of the filter material 48 opens up the possibility of the outer shell 2 instead of a solid plastic material of a flexible film, such as a polyamide such as PA6, form. Since the drainage layers 50 provide the required fluid paths, the outer shell 2 and the shell bottom 20 can directly conform to the inner contour, so that a particularly low overall height can be realized for the filter cartridge.
- Fig. 5 shows a second embodiment of the invention, in which only the coarse filter forming the filter element 16 as a suction filter and the fine filter forming the filter element 18 is operable as a return filter.
- the connecting piece 8 has two separate fluid paths, one of which forms a suction pump connection 54 and the other a return connection 56.
- the filter element 16 flows through the perforation region 24 of the shell bottom 20 as a coarse filter as in the first exemplary embodiment toward the pump connection.
- the fine filter forming the filter element 18 is via the return port 56 as Return filter operated, wherein, as shown in Fig. 5 with Einströmpfeil 58, the unfiltered material to the inner filter cavity 32 flows.
- the filtrate exiting on the outside of the filter element 18, like the filtrate of the coarse filter passes directly to the pump connection 54, s. Arrow 60 of FIG. 5.
- FIGS. 6 and 7 show a third embodiment in which, as in the example of Fig. 5, the coarse filter 16 is operated as a suction filter and the fine filter 18 as a return filter.
- the difference to the example of Fig. 5 is that in addition to the pump connection 54 forming the connecting piece 8, a second connecting piece 62 is provided which forms the return port 56. Since the second connecting piece 62 is aligned with the connecting piece 8, it is not visible in the sectional view of FIG. 7.
- the return flow is supplied at a return pressure, which may be up to 5 bar.
- the suction pressure is thereby reduced for the pump connection 54.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Water Supply & Treatment (AREA)
- General Details Of Gearings (AREA)
- Filtration Of Liquid (AREA)
- Laminated Bodies (AREA)
Abstract
The invention relates to a filter cartridge for gearbox oil filtration which can be used in the base region of a gearbox housing, said filter cartridge having at least two filter elements (16, 18) with differing filtration grades. The invention is characterised in that these at least two filter elements (16, 18) preferably lie substantially on a common plane.
Description
Filterkassette für Getriebeölfiltration Filter cassette for transmission oil filtration
Die Erfindung betrifft eine Filterkassette für Getriebeölfiltration, die in den Bodenbereich eines Getriebegehäuses einsetzbar ist, mit mindestens zwei Filterelementen, die sich in ihrer Filterfeinheit unterscheiden. Um über lange Betriebszeiträume hinweg einen sicheren und störungsfreien Betrieb von Getrieben, wie Automatikgetrieben von Kraftfahrzeugen, sicherzustellen, ist es Stand der Technik, für das Getriebeöl eine Filtervorrichtung vorzusehen. Diesbezüglich zeigt die DE 10 2007 023 641 B4 eine Filtervorrichtung in Form einer Filterkassette der eingangs genannten Gattung, die als Saugfilter arbeitet. Die Auslegung als Saugfilter zeichnet sich imThe invention relates to a filter cartridge for transmission oil filtration, which can be used in the bottom region of a transmission housing, with at least two filter elements, which differ in their filtration fineness. In order to ensure safe and trouble-free operation of transmissions, such as automatic transmissions of motor vehicles, over long periods of operation, it is state of the art to provide a filter device for the transmission oil. In this regard, DE 10 2007 023 641 B4 shows a filter device in the form of a filter cassette of the type mentioned, which operates as a suction filter. The design as a suction filter is characterized in
Vergleich zu einer Druckölfiltervorrichtung durch einen geringeren Bedarf an Einbauraum aus. Druckölfiltervorrichtungen, die üblicherweise in einem Nebenstrom arbeiten und innerhalb des Getriebegehäuses oder am Getriebegehäuse außen angebracht sind, weisen Anschlüsse mit Schlauch- oder Rohrverbindungen auf, die außerhalb des Getriebes verlaufen, was zu größerem Platzbedarf und höherem Gewicht führt. Außerdem ist ein Überdruckschutz im Druckölfilterkreislauf, üblicherweise mittels eines Bypass- ventils, erforderlich. Ein direkter Einbau in den Ölsumpf eines Getriebegehäuses, wie er bei dem genannten Dokument für eine Saugfiltervorrichtung vorgesehen ist, ist bei einer Druckölfiltervorrichtung wegen des geringen Einbauraumes, der bei Getrieben, insbesondere Fahrzeuggetrieben, zur Verfügung steht, kaum praktikabel.
Um die Filterkassette in einer geringen Bauhöhe zu realisieren, die einen Einbau in den sehr begrenzten, im Bodenbereich eines Getriebegehäuses zur Verfügung stehenden Freiraum ermöglicht, sind bei der aus dem ge- nannten Dokument bekannten Lösung als Filterelemente je eine flache Bahn aus einem Filtervlies vorgesehen. Diese Bahnen sind in Vertikalrichtung, d.h. in Richtung des vom Boden der Kassette hereinströmenden Saugstromes zueinander versetzt, wobei die Bahnen sowohl durch zwischen ihnen befindliche Abstandhalter in vertikalem Abstand voneinander gehalten sind, als auch durch Abstandhalter im Abstand von Kassettenboden und der die Kassettenoberseite bildenden Wand gehalten sind. Durch die vertikale Versetzung der die Filterelemente bildenden Bahnen durch die zwischen ihnen befindlichen Abstandhalter und die an den Außenseiten der Bahnen befindlichen Abstandhalter lässt sich die Bauhöhe der Filterkas- sette nicht in dem für den Einbau im Getriebegehäuse erforderlichen Maße verringern. Zudem ist die Effizienz der Abreinigung durch eine jeweilige flache Bahn aus Filtervlies im Vergleich mit Filterelementen, die ein mehrlagiges Filtermedium aufweisen, ungenügend. Ausgehend von diesem Stand der Technik stellt sich die Erfindung die Aufgabe, eine Filterkassette der eingangs genannten Gattung zur Verfügung zu stellen, die sich sowohl durch eine besonders geringe Bauhöhe als auch durch hohe Filtrationseffizienz auszeichnet. Erfindungsgemäß ist diese Aufgabe durch eine Filterkassette gelöst, die die Merkmale des Patentanspruches 1 in seiner Gesamtheit aufweist. Compared to a pressure oil filter device by a smaller need for installation space. Pressure oil filter devices, which usually operate in a bypass flow and are mounted externally within the transmission housing or on the transmission housing, have connections with hose or pipe connections that run outside of the transmission, resulting in greater space and weight. In addition, overpressure protection in the pressure oil filter circuit, usually by means of a bypass valve, is required. A direct installation in the oil sump of a gear housing, as provided in the cited document for a suction filter device, is hardly practicable in a pressure oil filter device because of the small installation space which is available in transmissions, in particular vehicle transmissions. In order to realize the filter cartridge in a low overall height, which allows installation in the very limited space available in the bottom area of a transmission housing, in the case of the solution known from the cited document, a flat web of a filter fleece is provided as filter elements. These tracks are in the vertical direction, ie, offset in the direction of the suction flow from the bottom of the cartridge to each other, the webs are held both by spacers between them at a vertical distance from each other, and held by spacers at a distance from the cassette bottom and the cassette top wall forming are. Due to the vertical displacement of the webs forming the filter elements by the spacers between them and the spacers located on the outer sides of the webs, the overall height of the filter cartridge can not be reduced to the extent necessary for installation in the gearbox housing. In addition, the efficiency of the cleaning by a respective flat sheet of filter fleece in comparison with filter elements having a multi-layer filter medium is insufficient. Based on this prior art, the invention has the object to provide a filter cartridge of the type mentioned is available, which is characterized both by a particularly low height and high filtration efficiency. According to the invention this object is achieved by a filter cartridge having the features of claim 1 in its entirety.
Gemäß dem kennzeichnenden Teil des Anspruches 1 besteht eine wesentliche Besonderheit der Erfindung darin, dass die Filterelemente zumindest teilweise, vorzugsweise vollständig in einer gemeinsamen Ebene liegen. Bei dieser Anordnung ohne vertikale Versetzung eröffnet sich die Möglichkeit,
anstelle flacher Bahnen aus Filtervlies Filterelemente vorzusehen, wie sie für hohe Filterleistungen üblicherweise mehrlagige Filtermedien aufweisen, beispielsweise in Form einer Filtermatte mit mehreren plissierten Lagen. Trotz geringer vertikaler Bauhöhe lassen sich dadurch große Filterflächen und dadurch eine hohe Effizienz der Abreinigung bei geringem ΔΡ und geringem Saugdruck erzielen. According to the characterizing part of claim 1, an essential feature of the invention is that the filter elements are at least partially, preferably completely in a common plane. In this arrangement without vertical displacement opens up the possibility Instead of flat webs of filter fleece filter elements provide, as they have for high filter performance usually multilayer filter media, for example in the form of a filter mat with multiple pleated layers. Despite the low vertical height, this makes it possible to achieve large filter surfaces and thus high cleaning efficiency at low ΔΡ and low suction pressure.
Bei besonders vorteilhaften Ausführungsbeispielen umgibt das Filtermaterial der Filterelemente einen inneren Filterhohlraum, wobei das Filtermaterial auf von der Kreisform abweichender Bahn derart geführt ist, dass sich für das Filterelement eine flachgestreckte Außenform ergibt. Filterelemente, bei denen das Filtermaterial einen inneren Filterhohlraum umgibt, sind in kreiszylindrischer Form als sogenannte Filterpatronen üblich und kommen wegen ihrer vorteilhaften Eigenschaften verbreitet zum Einsatz. Die Vorteile solcher Filterelemente lassen sich in sozusagen flachgedrückter, breiter Bauform, bei der der innere Filterhohlraum die Form eines breiten und flachen Ovals, wie auch die Außenseite des Filtermaterials, besitzt, auch bei der erfindungsgemäßen Filterkassette nutzen. Mit Vorteil kann ein Filterelement für eine Grobfiltration mit einer Filterfeinheit von etwa 50 μηη und ein Filterelement für eine Feinfiltration mit einer Filterfeinheit von etwa 10 /m vorgesehen sein. In particularly advantageous embodiments, the filter material of the filter elements surrounds an inner filter cavity, wherein the filter material is guided on deviating from the circular path such that results in a flat-stretched outer shape for the filter element. Filter elements in which the filter material surrounds an inner filter cavity are common in a circular cylindrical shape as so-called filter cartridges and are widely used because of their advantageous properties. The advantages of such filter elements can be used in a flat-pressed, wide design, in which the inner filter cavity has the shape of a wide and flat oval, as well as the outside of the filter material, even in the filter cartridge according to the invention. Advantageously, a filter element for a coarse filtration with a filter fineness of about 50 μηη and a filter element for a fine filtration with a filter fineness of about 10 / m can be provided.
Bei vorteilhaften Ausführungsbeispielen weist die Filterkassette eine Au- ßenhülle auf, an deren Oberseite zumindest ein Anschlussstutzen angeordnet ist, wobei sich beidseitig vom jeweiligen Stutzen ein Filterelement befindet. Wenn Grobfilter und Feinfilter gemessen in Horizontalrichtung unterschiedliche Abmessungen besitzen, ist der jeweilige Anschlussstutzen außerhalb des Zentralbereichs der Filterkassette gelegen.
Bei besonders vorteilhaften Ausführungsbeispielen besitzt die Außenhülle die Form einer flachen Schale mit einem von der den jeweiligen Anschlussstutzen aufweisenden Oberseite ausgehenden Umfangsrand, der den Schalenboden umgibt, der bis auf einen fluiddurchlässigen Einströmbereich ge- schlössen ist. In advantageous exemplary embodiments, the filter cassette has an outer casing, on the upper side of which at least one connecting piece is arranged, wherein a filter element is located on both sides of the respective nozzle. If the coarse filter and the fine filter have different dimensions measured in the horizontal direction, the respective connecting piece is located outside the central area of the filter cassette. In particularly advantageous embodiments, the outer shell has the shape of a shallow shell with a peripheral edge extending from the upper side having the respective connecting piece, which surrounds the shell bottom, which is closed except for a fluid-permeable inflow region.
Mit besonderem Vorteil kann hierbei der Schalenboden durch eine Folie aus einem Kunststoffmaterial, wie Polyethylenterephthalat (PET), gebildet sein, die eine den Einströmbereich bildende, örtlich begrenzte Perforation aufweist. With particular advantage, in this case the shell bottom can be formed by a film of a plastic material, such as polyethylene terephthalate (PET), which has a localized perforation forming the inflow region.
Im Öl enthaltende Luftanteile, die, wie sich gezeigt hat, bis 7 % betragen können, haben einen negativen Einfluss auf das Betriebsverhalten. Beim Ansaugen von Luft durch die Saugölpumpe besteht die Gefahr der Beschä- digung durch Kavitation. Bei Automatikgetrieben verschlechtert Luftgehalt im Öl des Wandlers die Regelbarkeit und kann zum Ruckeln beim Gangwechsel führen. Im Hinblick auf diese Problematik ist bei besonders vorteilhaften Ausführungsbeispielen der Erfindung die Anordnung so getroffen, dass die Außenhülle der Filterkassette einen den Umfangsrand des Schalen- bodens unter Bildung eines Zwischenraumes umgebenden Außenrand aufweist, dass der Zwischenraum auf einem Großteil seiner Länge durch Schlitze zur Oberseite der Außenhülle offen ist und dass im Zwischenraum ein Kranz aus koaleszierendem, eine Entgasung des Getriebeöls bewirkendem Material vorgesehen ist, das aus dem Zwischenraum nach außen vor- steht und bei der Funktionsposition auf dem Boden des Getriebegehäuses aufsteht. Die von dem im Öl stehenden Koaleszer abgeschiedene Luft steigt in dem Zwischenraum zwischen Schalen-Umfangsrand und Schalen- Außenrand auf und tritt über die Schlitze der Oberseite der Außenhülle aus, so dass die Saugölpumpe weitestgehend luftfreies Öl ansaugt.
Die Anordnung kann derart getroffen sein, dass vom Einströmbereich des Schalenbodens ein Fluidweg zur Anströmseite beider Filterelemente gebildet ist und dass für eine parallele Saugfiltration durch beide Filterelemente deren Abströmseiten mit einem gemeinsamen Pumpenanschlussstutzen oder mit je einem eigenen Pumpenanschlussstutzen verbunden sind. Um bei der gegebenen unterschiedlichen Filterfeinheit von Grob- und Feinfilter eine betrieblich günstige Volumenstromaufteilung bei der Filtration im gemeinsamen Nebenstrom zu erhalten, kann das Feinfilter vorteilhafterweise mit einer gegenüber dem Grobfilter größeren wirksamen Filterfläche ausge- legt sein. Airborne levels of air, which have been found to be up to 7%, have a negative impact on performance. When sucking in air through the suction oil pump, there is a risk of damage due to cavitation. In automatic transmissions, air content in the oil of the converter deteriorates the controllability and can lead to jerking during the gear change. In view of this problem, in particularly advantageous embodiments of the invention, the arrangement is such that the outer shell of the filter cartridge has a peripheral edge of the tray to form a space surrounding outer edge, that the gap over most of its length through slots to the top of Outer shell is open and that in the intermediate space a ring of coalescing, degassing the gear oil effecting material is provided which projects outwardly from the intermediate space and stands up in the functional position on the bottom of the gear housing. The air separated from the coalescer standing in the oil rises in the space between the shell peripheral edge and the shell outer edge and exits through the slots of the top of the outer shell, so that the suction oil pump sucks largely air-free oil. The arrangement can be made such that a fluid path to the upstream side of both filter elements is formed by the inflow region of the shell bottom and that for a parallel suction filtration through both filter elements whose outflow sides are connected to a common pump connection piece or with its own pump connection piece. In order to obtain a conveniently favorable volume flow distribution during filtration in the common bypass flow at the given different filter fineness of coarse and fine filter, the fine filter can advantageously be designed with a filter surface which is larger than the coarse filter.
Alternativ kann anstelle der Einkreis-Filtration eine Zweikreis-Filtration vorgesehen sein, wobei für einen Betrieb des Grobfilters als Saugfilter dessen Abströmseite mit einem Pumpenanschluss und für einen Betrieb des Feinfil- ters als Rücklauffilter dessen Anströmseite mit einem Rücklaufanschluss verbunden ist und wobei die Abströmseite des Feinfilters mit dem Pumpenanschluss verbunden ist. Da der Rücklaufstrom dem Feinfilter über den Rücklaufanschluss unter einem Rücklauf-Öldruck, der im Betrieb bis 5 bar betragen kann, zugeführt wird und der Filtratstrom aus dem Rücklauffilter (Feinfilter) in den Pumpenanschluss und damit direkt in die Saugleitung der Pumpe geleitet wird, reduziert sich der Saugdruck. Alternatively, instead of the single-circuit filtration, a two-circuit filtration may be provided, the downstream side being connected to a pump connection for operation of the coarse filter as a suction filter, and its inflow side being connected to a return connection for operation of the fine filter as a return filter, and the outflow side of the fine filter connected to the pump port. Since the return flow is fed to the fine filter via the return connection at a return oil pressure, which can be up to 5 bar in operation, and the filtrate from the return filter (fine filter) is fed into the pump connection and thus directly into the suction line of the pump the suction pressure.
Pumpenanschluss und Rücklaufanschluss können durch getrennte Fluidwe- ge in einem gemeinsamen Anschlussstutzen gebildet sein, oder es können eigene Anschlussstutzen für Pumpen- und Rücklaufanschluss vorgesehen sein. Pump connection and return connection can be formed by separate fluid paths in a common connection piece, or it can be provided own connection piece for pump and return connection.
Für eine Absonderung von beim Betrieb der Getriebe durch Abrieb in das Öl gelangenden Metallpartikeln kann die den Schalenboden bildende Folie eine Beschichtung mit Magnetpartikeln, beispielsweise in Form eines Lackes, aufweisen.
Eine besonders flache Bauweise der Filterkassette ist realisierbar, wenn die Außenhülle aus einer flexiblen Kunststofffolie gebildet ist und im Zwischenraum zwischen dem Filtermaterial der Filterelemente und der Außenhülle eine fluiddurchlässige Drainagelage vorgesehen ist. Bei dieser Bauweise, bei der innere Fluidkanäle durch die Drainagelage gebildet sind, kann die Außenhülle eine sich unmittelbar an die Drainagelage anschmiegende Form besitzen, so dass sich für die Filterkassette eine geringstmögliche Bauhöhe ergibt. For separation of metal particles passing through the abrasion of the gear during operation of the transmission, the film forming the bottom of the tray may have a coating with magnetic particles, for example in the form of a lacquer. A particularly flat design of the filter cartridge can be realized if the outer shell is formed of a flexible plastic film and a fluid-permeable drainage layer is provided in the space between the filter material of the filter elements and the outer shell. In this construction, in which inner fluid channels are formed by the drainage layer, the outer shell may have a shape which conforms directly to the drainage layer, so that the filter cassette has the lowest possible height.
Nachstehend ist die Erfindung anhand von in der Zeichnung dargestellten Ausführungsbeispielen im Einzelnen erläutert. Es zeigen: The invention with reference to embodiments shown in the drawings will be explained in detail. Show it:
Fig. 1 eine perspektivische Schrägansicht eines Ausführungsbeispieles der erfindungsgemäßen Filterkassette; Fig. 1 is a perspective oblique view of an embodiment of the filter cartridge according to the invention;
Fig. 2 einen schematisch vereinfacht gezeichneten Vertikalschnitt des Ausführungsbeispieles mit zentral verlaufender Schnittebene; 2 shows a schematic simplified drawn vertical section of the embodiment with centrally extending cutting plane.
Fig. 3 eine in perspektivischer Schrägansicht gezeichnete Untenansicht der Schale der Außenhülle des Ausführungsbeispieles, wobei der Schalenboden weggelassen ist; Figure 3 is a perspective view oblique view of the bottom of the shell of the outer shell of the embodiment, wherein the shell bottom is omitted.
Fig. 4 eine der Fig. 3 entsprechende Untenansicht mit angebrachtem Fig. 4 is a of FIG. 3 corresponding bottom view with attached
Schalenboden; Shell bottom;
Fig. 5 eine der Fig. 2 entsprechende schematisch vereinfachte Fig. 5 is one of the Fig. 2 corresponding schematically simplified
Schnittdarstellung eines zweiten Ausführungsbeispieles der erfindungsgemäßen Filterkassette, wobei eine Entgasungseinrichtung weggelassen ist; Sectional view of a second embodiment of the filter cartridge according to the invention, wherein a degassing device is omitted;
Fig. 6 eine perspektivische Schrägansicht, gesehen auf die Oberseite, eines dritten Ausführungsbeispieles der erfindungsgemä- ßen Filterkassette und
Fig. 7 eine der Fig. 5 entsprechende Schnittdarstellung des dritten Ausführungsbeispieles von Fig. 6, wobei eine Entgasungseinrichtung weggelassen ist. Die erfindungsgemäße Filterkassette weist eine Außenhülle 2 auf, die aus einem Kunststoffmaterial spritzgegossen ist und die, s. Fig. 1 , die Form eines flachen Rechteckquarders mit abgerundeten Eckbereichen aufweist. An der ebenflächigen Oberseite 6 befindet sich mittig zwischen den Langseiten, jedoch einer der Schmalseiten nähergelegen als der anderen Schmalsei- te, ein Anschlussstutzen 8. Zwischen den Eckbereichen 4 verläuft umfänglich durchgehend ein Außenrand 10, der, wie die Oberseite 6, ebenflächig ist und bei den gezeigten Ausführungsbeispielen eine vertikale Höhe besitzt, die etwa einem Zehntel der Länge der Langseiten entspricht. Wie am deutlichsten aus den Figuren 2 und 3 zu ersehen ist, ist durch einen inneren Umfangsrand 12, der sich in einem Abstand innerhalb des Außenrandes 10 und zu diesem parallel verlaufend erstreckt, in der Außenhülle 2 eine innere Schale gebildet, die an der Unterseite offen ist und in der, s. Fig. 2, zwei Filterelemente 16 und 18 aufgenommen sind. Die Fig. 3 zeigt den Blick von unten in die geöffnete Schale ohne darin eingebaute Filterelemente 16, 18, während Fig. 4 die durch einen Schalenboden 20 geschlossene Schale zeigt. Dieser Schalenboden 20 ist durch eine Kunststofffolie, wie PET, gebildet, die mit einer umfänglichen Randleiste 22 des inneren Umfangsran- des 12 verschweißt ist. Der die Schale ansonsten abschließende Schalenboden 20 weist einen sich parallel zu den Schmalseiten erstreckenden Per- forationsbereich 24 auf, der, s. Fig. 2 auf den Anschlussstutzen 8 ausgerichtet ist und für den Filtrationsbetrieb einen Einströmbereich bildet. 6 is a perspective oblique view, seen on the upper side, of a third embodiment of the filter cassette according to the invention and FIG Fig. 7 is a sectional view corresponding to Fig. 5 of the third embodiment of Fig. 6, wherein a degassing is omitted. The filter cartridge according to the invention has an outer shell 2 which is injection-molded from a plastic material and which, s. Fig. 1, which has the shape of a flat Rechteckquarders with rounded corners. On the planar upper side 6 is located centrally between the long sides, but one of the narrow sides closer than the other narrow side te, a connecting piece 8. Between the corner regions 4 extends circumferentially continuously an outer edge 10, which, like the top 6, is planar and at the embodiments shown has a vertical height which corresponds to about one tenth of the length of the long sides. As can be seen most clearly from Figures 2 and 3, an inner shell is formed in the outer shell 2 by an inner peripheral edge 12 which extends at a distance within the outer edge 10 and parallel to this, which open at the bottom is and in, s. Fig. 2, two filter elements 16 and 18 are added. FIG. 3 shows the view from below into the opened shell without filter elements 16, 18 installed therein, while FIG. 4 shows the shell closed by a shell bottom 20. This tray bottom 20 is formed by a plastic film, such as PET, which is welded to a circumferential edge strip 22 of the inner Umfangsran- 12. The shell base 20, which otherwise closes the shell, has a perforation region 24 extending parallel to the narrow sides, which, see FIG. Fig. 2 is aligned with the connecting piece 8 and forms an inflow region for the filtration operation.
In dem zwischen Außenrand 10 und Umfangsrand 12 gebildeten Zwischenraum 14 ist ein umfänglich verlaufender Kranz 26 aus koaleszieren- dem Material, beispielsweise in Form eines Drahtgewebes, derart angeordnet, dass er über die Unterseite des Schalenbodens 20 vorsteht und bei Ein-
bau der Filterkassette auf dem Bodenbereich des Getriebegehäuses im Öl steht und eine Entgasung bewirkt. Abgeschiedene Luft, die im Zwischenraum 14 aufsteigt, tritt über an der Oberseite 6 befindliche Schlitze 28 aus. Von den Filterelementen 16 und 18 ist das Filterelement 16 ein Grobfilter mit einer Filterfeinheit von 50 μηι, und das Filterelement 18 ist ein Feinfilter mit einer Filterfeinheit von 10 ytvm. Für eine günstige Volumenstromauftei- lung bei einem Saugfilterbetrieb im parallelen Nebenstrom beträgt die axiale Länge des Filterelements 18 etwa das 2,8fache des Filterelements 16. Die Filterelemente 16, 18 weisen als Filtermedium eine mehrlagige Filtermatte auf, die einen inneren Filterhohlraum 30 bzw. 32 umgibt und zwischen Endkappen 34 und 36 verläuft, die an Absätzen 38, die, s. Fig. 2, an der Innenseite der Oberseite 6 gebildet sind, mit der Außenhülle 2 verschweißt sind. Für den Saugfilterbetrieb ist der Anschlussstutzen 8 mit einer Saugölpumpe des Getriebes verbunden. Für die Durchströmung der Filterelemente 16, 18 tritt das Öl über den Perforationsbereich 24 in Einströmräume 40 (Fig. 3) ein, die zwischen einer Trennwand 42 und Leisten 44 gebildet sind, an welch letzteren die Folie des Schalenbodens 20 anliegt. Aus den Räumen 40 gelangt das Öl, wie mit Pfeilen 46 (Fig. 2) angedeutet ist, zur Außenseite der Filterelemente 16 und 18. Zur Bildung der Strömungswege zur Zuströ- mung zur Außenseite der Filterelemente 16, 18 befindet sich zwischen der Außenseite des Filtermaterials 48 und der benachbarten Wand von Außengehäuse 2 und den Schalenboden 20 bildender Folie jeweils eine Drainage- läge 50 in Form eines fluiddurchlässigen Schaummaterials, wie Dimicron. Nach Durchströmen des Filtermaterials 48 von außen nach innen strömt das Filtrat aus dem inneren Filterhohlraum 30 bzw. 32 des Grobfilterelements 16 bzw. Feinfilterelements 18, wie Fig. 2 mit Abströmpfeilen 52 angedeutet, aus dem Anschlussstutzen 8 ab.
Für die Absonderung von durch Abrieb in das Getriebeöl gelangenden Metallpartikeln weist die den Schalenboden 20 bildende Folie eine Beschich- tung mit Magnetpartikeln auf. Dies kann durch Auftragen von Lack erfolgen, dem Ferritpartikel zugesetzt sind, die nach dem Auftrag magnetisch ausgerichtet werden. Während bei üblichen Filterelementen, die ein mehrlagiges Filtermaterial aufweisen, das vorzugsweise plissiert ist und einen inneren Filterhohlraum umgibt, das Filtermaterial kreiszylindrisch ist, ist bei den erfindungsgemäßen Filterelementen 16, 18 das Filtermaterial 48 sozusagen flachgedrückt, d.h. der innere Filterhohlraum 30 und 32 ebenso wie die Außenseite des Filtermaterials 48 haben die Form eines sehr flachen Ovals, wobei sich die Außenseite des Filtermaterials 48 im Wesentlichen über die gesamte Breite der Schmalseite der Filterkassette erstreckt. Bei großer zur Verfügung stehender Filterfläche ist daher eine flache Bauweise der Außenhülle 2 realisierbar. Die Anordnung der Drainagelagen 50 an der Außenseite des Filtermaterials 48 eröffnet die Möglichkeit, die Außenhülle 2 anstatt aus festem Kunststoffmaterial aus einer flexiblen Folie, etwa ein Polyamid wie PA6, auszubilden. Da die Drainagelagen 50 die erforderlichen Fluidwege zur Verfügung stellen, können sich Außenhülle 2 und Schalenboden 20 unmittelbar an die Innenkontur anschmiegen, so dass für die Filterkassette eine besonders geringe Bauhöhe realisierbar ist. In the intermediate space 14 formed between the outer edge 10 and the peripheral edge 12, a circumferentially extending collar 26 of coalescing material, for example in the form of a wire mesh, is arranged such that it protrudes beyond the underside of the shell bottom 20 and when inserted. Construction of the filter cartridge is on the bottom portion of the transmission housing in the oil and causes a degassing. Exposed air rising in the intermediate space 14 exits via slots 28 located at the top 6. Of the filter elements 16 and 18, the filter element 16 is a coarse filter with a filter fineness of 50 μηι, and the filter element 18 is a fine filter with a filter fineness of 10 ytvm. For a favorable volume flow distribution in the case of a suction filter operation in the parallel bypass flow, the axial length of the filter element 18 is approximately 2.8 times the filter element 16. The filter elements 16, 18 have as a filter medium a multilayer filter mat which surrounds an inner filter cavity 30 or 32 and between end caps 34 and 36 attached to shoulders 38, which, see FIG. Fig. 2, are formed on the inside of the top 6, are welded to the outer shell 2. For the Saugfilterbetrieb the connecting piece 8 is connected to a suction oil pump of the transmission. For the flow through the filter elements 16, 18, the oil enters via the perforation region 24 in inflow spaces 40 (FIG. 3) which are formed between a dividing wall 42 and strips 44 against which the foil of the shell bottom 20 rests. From the spaces 40, the oil, as indicated by arrows 46 (Fig. 2), passes to the outside of the filter elements 16 and 18. To form the flow paths for inflow to the outside of the filter elements 16, 18 is located between the outside of the filter material 48 and the adjacent wall of the outer housing 2 and the shell bottom 20 forming film each have a drainage läge 50 in the form of a fluid-permeable foam material, such as Dimicron. After flowing through the filter material 48 from outside to inside, the filtrate from the inner filter cavity 30 or 32 of the coarse filter element 16 or fine filter element 18, as indicated in FIG. 2 with outflow arrows 52, flows out of the connecting piece 8. For the separation of metal particles passing through abrasion into the gear oil, the foil forming the shell bottom 20 has a coating with magnetic particles. This can be done by applying paint, the ferrite particles are added, which are magnetically aligned after the order. While in conventional filter elements having a multilayer filter material, which is preferably pleated and surrounds an inner filter cavity, the filter material is circular cylindrical, the filter material 48 is flattened, so to speak, in the filter elements 16, 18 according to the invention, ie, the inner filter cavity 30 and 32 as well Outside of the filter material 48 have the shape of a very flat oval, wherein the outside of the filter material 48 extends substantially over the entire width of the narrow side of the filter cartridge. With a large available filter surface, therefore, a flat construction of the outer shell 2 can be realized. The arrangement of the drainage layers 50 on the outside of the filter material 48 opens up the possibility of the outer shell 2 instead of a solid plastic material of a flexible film, such as a polyamide such as PA6, form. Since the drainage layers 50 provide the required fluid paths, the outer shell 2 and the shell bottom 20 can directly conform to the inner contour, so that a particularly low overall height can be realized for the filter cartridge.
In gegenüber Fig. 2 schematisch weiter vereinfachter Darstellung zeigt die Fig. 5 ein zweites Ausführungsbeispiel der Erfindung, bei dem nur das den Grobfilter bildende Filterelement 16 als Saugfilter und das den Feinfilter bildende Filterelement 18 als Rücklauffilter betreibbar ist. Bei diesem Ausführungsbeispiel weist der Anschlussstutzen 8 zwei voneinander getrennte Fluidwege auf, von denen einer einen Saugpumpenanschluss 54 und der andere einen Rücklaufanschluss 56 bildet. Über den Perforationsbereich 24 des Schalenbodens 20 ist das Filterelement 16 als Grobfilter wie beim ers- ten Ausführungsbeispiel zum Pumpenanschluss hin durchströmt. Das den Feinfilter bildende Filterelement 18 ist über den Rücklaufanschluss 56 als
Rücklauffilter betrieben, wobei, wie in Fig. 5 mit Einströmpfeil 58 gezeigt, das Unfiltrat zum inneren Filterhohlraum 32 zuströmt. Das an der Außenseite des Filterelements 18 austretende Filtrat gelangt, wie auch das Filtrat des Grobfilters, unmittelbar zum Pumpenanschluss 54, s. Pfeil 60 von Fig. 5. In comparison with FIG. 2 schematically further simplified representation, Fig. 5 shows a second embodiment of the invention, in which only the coarse filter forming the filter element 16 as a suction filter and the fine filter forming the filter element 18 is operable as a return filter. In this embodiment, the connecting piece 8 has two separate fluid paths, one of which forms a suction pump connection 54 and the other a return connection 56. The filter element 16 flows through the perforation region 24 of the shell bottom 20 as a coarse filter as in the first exemplary embodiment toward the pump connection. The fine filter forming the filter element 18 is via the return port 56 as Return filter operated, wherein, as shown in Fig. 5 with Einströmpfeil 58, the unfiltered material to the inner filter cavity 32 flows. The filtrate exiting on the outside of the filter element 18, like the filtrate of the coarse filter, passes directly to the pump connection 54, s. Arrow 60 of FIG. 5.
Die Figuren 6 und 7 zeigen ein drittes Ausführungsbeispiel, bei dem, wie beim Beispiel von Fig. 5, das Grobfilter 16 als Saugfilter und das Feinfilter 18 als Rücklauffilter betrieben ist. Der Unterschied zum Beispiel von Fig. 5 besteht darin, dass zusätzlich zum den Pumpenanschluss 54 bildenden Anschlussstutzen 8 ein zweiter Anschlussstutzen 62 vorgesehen ist, der den Rücklaufanschluss 56 bildet. Da der zweite Anschlussstutzen 62 mit dem Anschlussstutzen 8 fluchtet, ist er in der Schnittdarstellung von Fig. 7 nicht sichtbar. Beim dritten Ausführungsbeispiel, wie bei dem zweiten Ausfüh- rungsbeispiel von Fig. 5, wird der Rücklauf- Volumenstrom unter einem Rücklaufdruck zugeführt, der bis 5 bar betragen kann. Durch das dem Pumpenanschluss 54 direkt eingespeiste Filtrat des Rücklauffilters 18 reduziert sich dadurch für den Pumpenanschluss 54 der Saugdruck.
Figures 6 and 7 show a third embodiment in which, as in the example of Fig. 5, the coarse filter 16 is operated as a suction filter and the fine filter 18 as a return filter. The difference to the example of Fig. 5 is that in addition to the pump connection 54 forming the connecting piece 8, a second connecting piece 62 is provided which forms the return port 56. Since the second connecting piece 62 is aligned with the connecting piece 8, it is not visible in the sectional view of FIG. 7. In the third embodiment, as in the second embodiment of FIG. 5, the return flow is supplied at a return pressure, which may be up to 5 bar. As a result of the filtrate of the return filter 18 fed directly to the pump connection 54, the suction pressure is thereby reduced for the pump connection 54.
Claims
Pate nta n s p r ü c h e Pate nta n s p r e c h e
Filterkassette für Getriebeölfiltration, die in den Bodenbereich eines Getriebegehäuses einsetzbar ist, mit mindestens zwei Filterelementen (16, 18), die sich in ihrer Filterfeinheit unterscheiden, dadurch gekennzeichnet, dass mindestens diese beiden Filterelemente (16, 18) im Wesentlichen, vorzugsweise in einer gemeinsamen Ebene liegen. Filter cassette for transmission oil filtration, which is used in the bottom portion of a transmission housing, with at least two filter elements (16, 18), which differ in their filtration fineness, characterized in that at least these two filter elements (16, 18) substantially, preferably in a common Lie flat.
Filterkassette nach Anspruch 1, dadurch gekennzeichnet, dass das Filtermaterial (48) der Filterelemente (16, 18) einen inneren Filterhohlraum (30, 32) umgibt und auf von der Kreisform abweichender Bahn derart geführt ist, dass sich für das Filterelement (16, 18) eine flachgestreckte Außenform ergibt. Filter cartridge according to claim 1, characterized in that the filter material (48) of the filter elements (16, 18) surrounds an inner filter cavity (30, 32) and is guided on a non-circular path such that the filter element (16, 18 ) gives a flat-stretched outer shape.
Filterkassette nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass ein Filterelement (16) für eine Grobfiltration mit einer Filterfeinheit von etwa 50 jt/m und ein Filterelement (18) für eine Feinfiltration mit einer Filterfeinheit von etwa 10 μνη vorgesehen sind. Filter cartridge according to claim 1 or 2, characterized in that a filter element (16) for a coarse filtration with a filter fineness of about 50 jt / m and a filter element (18) for a fine filtration with a filter fineness of about 10 μνη are provided.
Filterkassette nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass sie eine Außenhülle (8) aufweist, an deren Oberseite (6) zumindest ein Anschlussstutzen (8) angeordnet ist, und dass sich beidseitig vom jeweiligen Stutzen (8) ein Filterelement (16, 18) befindet. Filter cartridge according to one of the preceding claims, characterized in that it comprises an outer shell (8), at the upper side (6) at least one connecting piece (8) is arranged, and that on both sides of the respective nozzle (8) has a filter element (16, 18 ) is located.
Filterkassette nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Außenhülle (2) die Form einer flachen Schale mit einem von der den jeweiligen Anschlussstutzen (8) aufweisenden Oberseite (6) ausgehenden Umfangsrand (12) besitzt, der den Schalenboden (20) umgibt, der bis auf einen fluiddurchlässigen Einströmbereich (24) geschlossen ist.
Filterkassette nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass der Schalenboden (20) durch eine Folie aus einem Kunststoff material, wie Polyethylenterephthalat (PET), gebildet ist, die eine den Einströmbereich bildende, örtlich begrenzte Perforation (24) aufweist. Filter cartridge according to one of the preceding claims, characterized in that the outer shell (2) has the shape of a flat shell with one of the respective connecting piece (8) having top (6) emanating peripheral edge (12) surrounding the shell bottom (20) which is closed except for a fluid-permeable inflow region (24). Filter cartridge according to one of the preceding claims, characterized in that the shell bottom (20) by a film of a plastic material, such as polyethylene terephthalate (PET), is formed, having a inflow region forming, localized perforation (24).
Filterkassette nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Außenhülle (2) einen den Umfangsrand (12) des Schalenbodens (20) unter Bildung eines Zwischenraumes (14) umgebenden Außenrand (10) aufweist, dass der Zwischenraum (14) auf einem Großteil seiner Länge durch Schlitze (18) zur Oberseite (6) der Außenhülle (2) offen ist und dass im Zwischenraum ein Kranz (26) aus koaleszierendem, eine Entgasung des Getriebeöls bewirkendem Material vorgesehen ist, der aus dem Zwischenraum (14) nach unten vorsteht und bei der Funktionsposition auf dem Boden des Getriebegehäuses aufsteht. Filter cartridge according to one of the preceding claims, characterized in that the outer shell (2) has a peripheral edge (12) of the shell bottom (20) to form a gap (14) surrounding outer edge (10), that the intermediate space (14) on a large part its length through slots (18) to the top (6) of the outer shell (2) is open and that in the intermediate space a ring (26) is provided from coaleszierendem, a degassing of the gear oil effecting material projecting from the intermediate space (14) downwards and stands up at the functional position on the bottom of the gearbox housing.
Filterkassette nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass vom Einströmbereich (24) des Schalenbodens (20) ein Fluidweg (46) zur Anströmseite beider Filterelemente (16, 18) gebildet ist und dass für eine parallele Saugfiltration durch beide Filterelemente (16, 18) deren Abströmseiten mit einem gemeinsamen Pumpenanschlussstutzen (8) oder mit je einem eigenen Pumpenan- schlussstutzen verbunden sind. Filter cartridge according to one of the preceding claims, characterized in that from the inflow region (24) of the shell bottom (20) a fluid path (46) to the inflow side of both filter elements (16, 18) is formed and that for a parallel suction filtration through both filter elements (16, 18 ) whose outflow sides are connected to a common pump connection stub (8) or each with its own pump connection stub.
Filterkassette nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass für einen Betrieb des Grobfilters (16) als Saugfilter dessen Abströmseite (52) mit einem Pumpenanschluss (54) und für einen Betrieb des Feinfilters (18) als Rücklauffilter dessen Anströmseite (58) mit einem Rücklaufanschluss (56) verbunden ist und dass die Ab-
strömseite (60) des Feinfilters (18) mit dem Pumpenanschluss (54) verbunden ist. Filter cartridge according to one of the preceding claims, characterized in that for operation of the coarse filter (16) as a suction filter whose outflow side (52) with a pump port (54) and for operation of the fine filter (18) as a return filter whose inflow side (58) with a Return connection (56) is connected and that the Ab- stream side (60) of the fine filter (18) with the pump port (54) is connected.
Filterkassette nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass Pumpenanschluss (54) und Rücklaufanschluss (56) durch getrennte Fluidwege in einem gemeinsamen Anschlussstutzen (8) gebildet sind oder dass eigene Anschlussstutzen (8 und 62) für Pumpen (54)- und Rücklaufanschluss (56) vorgesehen sind. Filter cartridge according to one of the preceding claims, characterized in that the pump connection (54) and return connection (56) are formed by separate fluid paths in a common connecting piece (8) or that own connecting pieces (8 and 62) for pump (54) - and return connection ( 56) are provided.
Filterkassette nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die den Schalenboden (20) bildende Folie eine Beschichtung mit Magnetpartikeln aufweist. Filter cassette according to one of the preceding claims, characterized in that the film forming the shell bottom (20) has a coating with magnetic particles.
Filterkassette nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Außenhülle (2) aus einer flexiblen Kunststofffolie gebildet ist und dass im Zwischenraum zwischen dem Filtermaterial (48) der Filterelemente (16, 18) und der Außenhülle (2) und dem Schalenboden (20) eine fluiddurchlässige Drainagelage (50) vorgesehen ist.
Filter cartridge according to one of the preceding claims, characterized in that the outer shell (2) is formed of a flexible plastic film and that in the space between the filter material (48) of the filter elements (16, 18) and the outer shell (2) and the shell bottom (20 ) a fluid-permeable drainage layer (50) is provided.
Applications Claiming Priority (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016012614 | 2016-10-19 | ||
DE102016012614.0 | 2016-10-19 | ||
DE102017001376.4 | 2017-02-14 | ||
DE102017001376.4A DE102017001376A1 (en) | 2016-10-19 | 2017-02-14 | Filter cassette for transmission oil filtration |
DE102017001375.6 | 2017-02-14 | ||
DE102017001716.6 | 2017-02-14 | ||
DE102017001716.6A DE102017001716A1 (en) | 2016-10-19 | 2017-02-14 | filter cassette |
DE102017001375.6A DE102017001375A1 (en) | 2016-10-19 | 2017-02-14 | Film with a surface element made of a thermoplastic material and method for producing the film |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2018072868A1 true WO2018072868A1 (en) | 2018-04-26 |
WO2018072868A8 WO2018072868A8 (en) | 2018-07-05 |
Family
ID=61764915
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2017/001189 WO2018072868A1 (en) | 2016-10-19 | 2017-10-09 | Filter cartridge for gearbox oil filtration |
PCT/EP2017/001188 WO2018072867A1 (en) | 2016-10-19 | 2017-10-09 | Filter cassette |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2017/001188 WO2018072867A1 (en) | 2016-10-19 | 2017-10-09 | Filter cassette |
Country Status (2)
Country | Link |
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DE (3) | DE102017001716A1 (en) |
WO (2) | WO2018072868A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018100145A1 (en) * | 2018-01-04 | 2019-07-04 | Ibs Filtran Kunststoff-/ Metallerzeugnisse Gmbh | Filter device with air separation |
CN111905449A (en) * | 2018-07-26 | 2020-11-10 | 揣羽 | Processing equipment and processing method for filtering rust impurities in metallic paint |
DE102018006672B3 (en) * | 2018-08-23 | 2019-10-31 | Hydac Fluidcarecenter Gmbh | Treatment device for transmission oil |
CN113236751B (en) * | 2021-05-12 | 2022-06-14 | 瑞安市蓝星宇汽车科技有限公司 | Gearbox filter of new energy hybrid electric vehicle and working method thereof |
CN115531979A (en) * | 2022-09-16 | 2022-12-30 | 广东以色列理工学院 | Intelligent net material capable of adjusting liquid permeability in real time and preparation method thereof |
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DE19727205A1 (en) * | 1996-06-29 | 1998-12-24 | Luk Fahrzeug Hydraulik | Oil suction filter for automatic gearboxes |
US20130146526A1 (en) * | 2011-07-27 | 2013-06-13 | Toyota Boshoku Kabushiki Kaisha | Fluid filter |
DE102007023641B4 (en) | 2007-05-22 | 2015-04-02 | Ibs Filtran Kunststoff-/ Metallerzeugnisse Gmbh | Oil filter device |
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GB569458A (en) * | 1943-07-17 | 1945-05-24 | Air Maze Great Britain Ltd | Improvements relating to filters for fluids |
JPH06185597A (en) * | 1992-12-16 | 1994-07-05 | Nissan Motor Co Ltd | Pump suction structure for transmission |
DE19933620A1 (en) * | 1999-07-17 | 2001-01-18 | Zahnradfabrik Friedrichshafen | Oil filter for hydraulically operated machines with rotating parts, especially automatic gear boxes of vehicles, has membrane inserted in it to remove air bubbles present in oil stream |
US6793812B2 (en) * | 2001-07-06 | 2004-09-21 | Spx Corporation | Fluid filtration assembly combining return-side and supply-side filters for use in a vehicle transmission |
US20060180398A1 (en) * | 2005-02-07 | 2006-08-17 | Ibrahim Khalil | Integrated waffle pan apparatus and method |
US8246503B2 (en) * | 2009-06-10 | 2012-08-21 | United Technologies Corporation | Epicyclic gear system with improved lubrication system |
KR20110092655A (en) * | 2010-02-10 | 2011-08-18 | 현대 파워텍 주식회사 | Mounting structure of oil filter for automatic transmission |
DE102010035981A1 (en) * | 2010-09-01 | 2012-03-01 | Hydac Filtertechnik Gmbh | Component for a filter unit for the filtration of fluids and method for producing such a component |
JP5992784B2 (en) * | 2011-09-20 | 2016-09-14 | Nok株式会社 | Oil strainer |
DE102011115050A1 (en) | 2011-10-07 | 2013-04-11 | Hydac Filtertechnik Gmbh | Support structure for a filter element |
DE102011117163B4 (en) * | 2011-10-28 | 2015-03-05 | Ibs Filtran Kunststoff-/ Metallerzeugnisse Gmbh | A filter assembly |
DE102011122348A1 (en) | 2011-12-23 | 2013-06-27 | Hydac Filtertechnik Gmbh | Method for manufacturing medium-transmissive casing to cover filter folding of cylindrical filter element in e.g. mobile working machine, involves forming casing from connected film layers, and obtaining layers as co-extrudate |
JP5928697B2 (en) * | 2012-02-21 | 2016-06-01 | Nok株式会社 | Oil strainer |
-
2017
- 2017-02-14 DE DE102017001716.6A patent/DE102017001716A1/en not_active Withdrawn
- 2017-02-14 DE DE102017001376.4A patent/DE102017001376A1/en not_active Withdrawn
- 2017-02-14 DE DE102017001375.6A patent/DE102017001375A1/en not_active Withdrawn
- 2017-10-09 WO PCT/EP2017/001189 patent/WO2018072868A1/en active Application Filing
- 2017-10-09 WO PCT/EP2017/001188 patent/WO2018072867A1/en active Application Filing
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US3784011A (en) * | 1972-04-28 | 1974-01-08 | F P Smith Corp | Automatic transmission fluid filter |
US5584988A (en) * | 1993-11-11 | 1996-12-17 | Nissan Motor Co., Ltd. | Filter for in-tank fuel pump |
DE19727205A1 (en) * | 1996-06-29 | 1998-12-24 | Luk Fahrzeug Hydraulik | Oil suction filter for automatic gearboxes |
DE102007023641B4 (en) | 2007-05-22 | 2015-04-02 | Ibs Filtran Kunststoff-/ Metallerzeugnisse Gmbh | Oil filter device |
US20130146526A1 (en) * | 2011-07-27 | 2013-06-13 | Toyota Boshoku Kabushiki Kaisha | Fluid filter |
Also Published As
Publication number | Publication date |
---|---|
DE102017001716A1 (en) | 2018-04-19 |
DE102017001376A1 (en) | 2018-04-19 |
DE102017001375A1 (en) | 2018-04-19 |
WO2018072868A8 (en) | 2018-07-05 |
WO2018072867A8 (en) | 2018-07-05 |
WO2018072867A1 (en) | 2018-04-26 |
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