EP1067999B2 - Filter for fluids - Google Patents

Filter for fluids Download PDF

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Publication number
EP1067999B2
EP1067999B2 EP99911588A EP99911588A EP1067999B2 EP 1067999 B2 EP1067999 B2 EP 1067999B2 EP 99911588 A EP99911588 A EP 99911588A EP 99911588 A EP99911588 A EP 99911588A EP 1067999 B2 EP1067999 B2 EP 1067999B2
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EP
European Patent Office
Prior art keywords
liquid
filter according
liquid filter
collecting space
channel
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
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EP99911588A
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German (de)
French (fr)
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EP1067999A1 (en
EP1067999B1 (en
EP1067999B9 (en
Inventor
Thomas Brieden
Markus Layer
Jürgen Frey
Mario Mürwald
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mahle Filtersysteme GmbH
Mercedes Benz Group AG
Original Assignee
DaimlerChrysler AG
Mahle Filtersysteme GmbH
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Application filed by DaimlerChrysler AG, Mahle Filtersysteme GmbH filed Critical DaimlerChrysler AG
Publication of EP1067999A1 publication Critical patent/EP1067999A1/en
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Publication of EP1067999B2 publication Critical patent/EP1067999B2/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/03—Mounting or connecting of lubricant purifying means relative to the machine or engine; Details of lubricant purifying means

Definitions

  • the invention relates to a liquid filter according to the preamble of claim 1.
  • Such a filter is known from EP 0 492 627 A2.
  • the collection room is closed there, so that in this penetrating liquid does not go outside can drain away.
  • WO 97/16234 is a liquid filter known for cleaning oil or fuel, that to an engine block of an internal combustion engine is flanged.
  • a cylindrical filter body In the existing plastic Housing of the filter is arranged a cylindrical filter body, its raw side with contaminated liquid, which is supplied via an inlet channel, acted upon becomes.
  • the outflow space of the filter body is with connected to a return channel through which the cleaned Liquid from the filter housing can be discharged.
  • the Inlet channel surrounds the return channel annular, wherein the outer wall of the inlet channel through the Outside wall of the filter housing is formed.
  • the frontal connections of the inlet and the return channel are about seals in receptacles on the engine block used.
  • the liquid to be cleaned is under pressure passed through the inlet channel to the filter body.
  • leaks occur, for example due to material fatigue of Seals, so that the raw fluid comes out and Can cause soiling or inside flows into the return channel and with the already cleaned Liquid mixed.
  • the seals must be made of very high quality and expensive material. In addition even small leaks cause a strong Pressure drop, so that required for the filtration Minimum pressure is not applied and filtration is not can be carried out.
  • the invention is based on the problem with low effort even in the case of a reliable and low-maintenance, generic plastic-liquid filter in which by Materialund / or Manufacturing errors caused unintentionally under high Pressure fluid in a larger volume enters the collection room as this room can absorb without pressure increase.
  • the generic filter in a mold be a constructive rational integration of additional Functional parts such as in particular a cooler for allows the liquid to be filtered as well as pressure sensors.
  • the inlet channel and the return channel lie in a containment room with a safety wall, which is part of the filter housing and the inlet channel and encloses the return channel radially.
  • a safety wall which is part of the filter housing and the inlet channel and encloses the return channel radially.
  • the safety is increased in case of leaking seals, because both the incoming crude liquid as also the outflowing clean liquid twice against the Environment are completed: within the inlet or the return channel and also within the Collecting space, the wall with little effort liquid-tight connected to the connecting flange can be.
  • the catchment room penetrating liquid through the provided there Drain drain, causing in the collecting space an unintentionally high pressure safely avoided becomes.
  • the pressure in the catchment room is limited to the pressure at its outlet.
  • the catchment room can be at atmospheric pressure be interpreted.
  • the overpressure in the supplied or discharged liquid flow is completely from the inlet or return channel recorded.
  • the catchment room remains unaffected, it acts as a security reservoir in the event that leaks occur. This will have to the seal between the safety wall and the connecting flange no elevated Quality requirements are made, that is For example, it can be a simple O-ring seal be used.
  • the filter housing made of plastic can in Injection molding in a casting with sufficient Dimensional accuracy can be made so that a post-processing is no longer necessary. In addition, a achieved considerable weight advantage.
  • the in the filter housing trained channels can run relatively thick-walled become the ones prevailing in the liquid To absorb pressures; At the same time, the security wall can be executed thin-walled, as in the Collection chamber no pressure applied.
  • the connections of the inlet channel and the return channel with a radial seal provided to a pressure and liquid-tight seal between the filter housing and the connecting flange to obtain.
  • Holding forces are essentially over the safety wall the pressure-free collecting space and in particular over reinforced fastening dome, in which appropriate metal bushes added are transferred, so that the channels of high Achs handledn are relieved and an undesirable Creep behavior of the plastic in the area of the channels is avoided.
  • the radial seals are preferably spherical designed to compensate for axial tolerances can.
  • the drainage channel runs in the connecting flange and is over a recess in the connecting flange with the collecting space connected.
  • a pressure relief valve be provided by the pressure on the Pure side of the filter is applied and when exceeded opens a boundary pressure to the collecting space and thereby causes a pressure relief.
  • the liquid leaked from the collecting space will turn derived via the drainage channel from the collecting space.
  • the liquid filter 1, the suitable for filtering oil or fuel in one Internal combustion engine is used, with the off Plastic existing filter housing 2 on a connecting flange 18, in particular an engine block a Internal combustion engine, mounted.
  • the to be cleaned Liquid will overpressure over Connecting flange 18 through a raw liquid line 25 via an inlet channel in the filter housing 2 first an oil cooler 24 arranged above the filter 1 fed and then through a filter body. 3 directed, in a lateral, radially outward directed cylindrical portion 26 of the filter housing 2 is located. After cleaning, the clean liquid flows via a return channel in the filter housing 2 back in a clean line 17 in the connection flange 18th
  • the cylindrical portion 26 with the filter body 3 is closed by a removable lid 27.
  • the filter housing 2, the connecting flange 18 and the oil cooler 24 are held together by screws 29, those in attachment domes 20, which are integrally formed with the filter housing, guided are; To increase the stability can in the attachment domes 20 metal bushings to be injected.
  • Fig. 2 is the supply of the unpurified liquid to remove in the filter housing 2.
  • the uncleaned Liquid flows over the radially inward guided Raw liquid line 25 in the connection flange 18th up to a recess in the connecting flange 18, in the the vertically extending inlet channel 4 in the filter housing 2 is inserted.
  • a radial seal 10 is arranged by means of the a liquid-tight seal between the Inlet channel 4 and the recess in the connection flange 18 is created.
  • the radial seal 10 is preferred crowned to compensate for axial tolerances.
  • a return check valve 19 arranged to a reflux of the to be cleaned Liquid back into the raw liquid line 25 to prevent.
  • the raw liquid continues to flow in the direction of the arrow up into the oil cooler 24, where the liquid tempered, i. cooled or heated depending on the application becomes.
  • a radial seal 34 is arranged in the area of the connection of the oil filter 24 to the inlet channel 4.
  • the inlet channel 4 is located in an annular Collection room 6 with a safety wall 7, the part of the filter housing 2 and the inlet channel 4 radially includes.
  • the collecting space 6 is formed without pressure and communicates with a recess 30 in FIG Connecting flange 18, which in radially extending drainage channels 23, which leads to the oil pan of the internal combustion engine to lead.
  • the drainage channels 23 can run parallel and have different diameters.
  • the front side 12 of the safety wall 7 engages in a circular recess on the top of the connecting flange 18, wherein in the region of End face 12 of the safety wall 7 between the Wall of recess and security wall one O-ring seal 13 is arranged around the collecting space 6 to complete liquid-tight against the environment.
  • Fig. 3 is the derivative of the liquid from the Remove filter housing 2.
  • the liquid After cooling the liquid in the oil cooler 24, the liquid is the filter body in the cylindrical portion 26 of the filter housing second fed.
  • the purified liquid flows from the radially inner outflow space 33 of the filter body in the return channel 5, which in the filter housing 2 is formed and extending in the vertical direction extends.
  • the return channel 5 has in the area its connection 9 a radial seal 11, which in a recess 31 in the connecting flange 18 protrudes and the return passage 5 with the connecting flange 18th pressure and fluid tight connects.
  • the recess 31 flows into a horizontal clean line 17, over which the purified liquid radially out of the Connecting flange 18 is guided and, for example at Use of oil as a liquid for lubrication of Storage locations can be used.
  • a pressure sensor 21 and a turbocharger port In the return passage 5 projects radially a fitting 22, via which the pressure in the return channel 5 a pressure sensor 21 and a turbocharger port can be fed.
  • the connector 22 is in a socket 35th inserted and in this nozzle via a radial seal 36 sealed.
  • the fixation of the connecting piece 22 on the nozzle 35 can by a bayonet lock be achieved.
  • the bayonet lock may in particular be designed in such a way that he by latching the bayonet closure means, without having to twist them against each other, can be closed.
  • Inside the filter housing 2 is the connecting piece 22 for fixing the Return channel 5.
  • the connection between the Return channel 5 and the connector 22 is carried out by that at one end of the annular wall of the return channel 5 an axial slot 37 is provided in the an outgoing from the fitting 22 fitting snap-in style is inserted.
  • connection types described above between the connector 22 and the Stutzen 35 on the one hand and between the return channel 5 and the connector 22 on the other hand are at the subject invention only manufacturing technology easy to produce sliding joints available.
  • a sliding connection with a Radial seal and a bayonet lock can also the pressure sensor 2 with the connector 22 in be connected advantageously.
  • the same way can also have other functional parts with the filter housing be connected fluidly.
  • a pressure relief valve 15 Parallel to the return channel 5 is a pressure relief valve 15 arranged in one piece with the Filter housing 2 formed housing receptacle 16th sitting.
  • the pressure relief valve closes 15 a communicating with the receiving space 6 Recess 32 in the connection flange 18, which connects the collecting space 6 with the clean line 17, so that when the pressure relief valve 15 is closed Connection between the clean line 17 and the collecting space 6 is interrupted.
  • a limit pressure in the clean line 17 opens the pressure relief valve 15, by the spring-loaded valve body in the closed position the pressure relief valve 15 recedes and the Connection between the recess 32 and the Collection chamber 6 releases so that liquid from the clean line 17 can flow into the collecting space 6 and a Overpressure in the clean line 17 is reduced.
  • the collecting space 6 escaped liquid can over the illustrated in Fig. 2, communicating with the collecting space 6 Recess 30 in the connection flange 18th flow away.
  • the return channel 5, the housing receptacle 16 and the inlet channel 4 shown in FIG. 2 run parallel to each other.
  • the front sides of the channels 4, 5, the Housing receptacle 16 and expedient and the safety wall 7 end axially advantageous in different Distance.
  • FIG. 4 The illustration according to FIG. 4 can be seen that the inlet channel 4 with the return check valve 19, the return channel 5, the pressure relief valve 15th in the housing receptacle 16 ( Figure 3) and the recess 30 in the connecting flange all radially within the cylindrical safety wall 7 lie, which the collecting space 6 limited.
  • clean line 17 flows the liquid via the pressure relief valve 15 into the collecting space 6 and flows through the recess 30 again.
  • the safety wall 7 lies within one Housing outer wall 14.
  • the Befest Trentsdome 20 mark corner points in the outer wall 14; there are in total four fastening domes 20 are provided, which together to form a rectangle.

Description

Die Erfindung betrifft ein Flüssigkeitsfilter nach dem Oberbegriff des Anspruches 1.The invention relates to a liquid filter according to the preamble of claim 1.

Ein solches Filter ist aus EP 0 492 627 A2 bekannt. Der Auffangraum ist dort in sich geschlossen, so daß in diesen eindringende Flüssigkeit nicht nach außerhalb abfließen kann.Such a filter is known from EP 0 492 627 A2. The collection room is closed there, so that in this penetrating liquid does not go outside can drain away.

Aus der Druckschrift WO 97/16234 ist ein Flüssigkeitsfilter zur Reinigung von Öl oder Kraftstoff bekannt, das an einen Motorblock einer Brennkraftmaschine angeflanscht ist. In dem aus Kunststoff bestehenden Gehäuse des Filters ist ein zylindrischer Filterkörper angeordnet, dessen Rohseite mit verunreinigter Flüssigkeit, die über einen Zulaufkanal zugeführt wird, beaufschlagt wird. Der Abströmraum des Filterkörpers ist mit einem Rücklaufkanal verbunden, über den die gereinigte Flüssigkeit aus dem Filtergehäuse abführbar ist. Der Zulaufkanal umschließt den Rücklaufkanal ringförmig, wobei die Außenwandung des Zulaufkanals durch die Außenwandung des Filtergehäuses gebildet ist. Die stirnseitigen Anschlüsse des Zulauf- und des Rücklaufkanals sind über Dichtungen in Aufnahmen am Motorblock eingesetzt.From the document WO 97/16234 is a liquid filter known for cleaning oil or fuel, that to an engine block of an internal combustion engine is flanged. In the existing plastic Housing of the filter is arranged a cylindrical filter body, its raw side with contaminated liquid, which is supplied via an inlet channel, acted upon becomes. The outflow space of the filter body is with connected to a return channel through which the cleaned Liquid from the filter housing can be discharged. Of the Inlet channel surrounds the return channel annular, wherein the outer wall of the inlet channel through the Outside wall of the filter housing is formed. The frontal connections of the inlet and the return channel are about seals in receptacles on the engine block used.

Die zu reinigende Flüssigkeit wird unter Überdruck durch den Zulaufkanal zum Filterkörper geführt. Dabei besteht die Gefahr, daß im Bereich des Anschlusses des Filtergehäuses am Motorblock Undichtigkeiten auftreten, beispielsweise infolge Materialermüdung der Dichtungen, so daß Rohflüssigkeit nach außen tritt und Verschmutzungen verursachen kann oder nach innen in den Rücklaufkanal strömt und sich mit der bereits gereinigten Flüssigkeit vermischt. Um diese Gefahr zu reduzieren, müssen die Dichtungen aus sehr hochwertigem und teurem Material ausgeführt sein. Außerdem verursachen bereits geringe Leckagen einen starken Druckabfall, so daß der für die Filtrierung erforderliche Mindestdruck nicht aufgebracht und die Filtrierung nicht durchgeführt werden kann.The liquid to be cleaned is under pressure passed through the inlet channel to the filter body. There is a risk that in the area of the connection of the filter housing on the engine block leaks occur, for example due to material fatigue of Seals, so that the raw fluid comes out and Can cause soiling or inside flows into the return channel and with the already cleaned Liquid mixed. To reduce this risk, The seals must be made of very high quality and expensive material. In addition even small leaks cause a strong Pressure drop, so that required for the filtration Minimum pressure is not applied and filtration is not can be carried out.

Bedingt durch den großen Außenradius des Zulaufkanals wird viel Dichtungsmaterial zum Abdichten des Zulaufkanals benötigt, wodurch neben den erhöhten Kosten auch das Risiko einer Leckstelle steigt und häufige Wartungsintervalle erforderlich sind.Due to the large outer radius of the Inlet channel is much sealing material for sealing of the inlet channel needed, which in addition to the elevated Cost also increases the risk of a leak and frequent maintenance intervals are required.

Der Erfindung liegt das Problem zugrunde, mit geringem Aufwand auch für den Fall ein betriebssicheres und wartungsarmes, gattungsgemäßes Kunststoff-Flüssigkeitsfilter auszubilden, in dem durch Materialund/oder Fertigungsfehler bedingt ungewollt unter hohem Druck stehende Flüssigkeit in einem größeren Volumen in den Auffangraum eindringt als dieser Raum ohne Druckerhöhung aufnehmen kann. Außerdem soll das gattungsgemäße Filter in einer Form ausgebildet sein, die eine konstruktiv rationelle Integration zusätzlicher Funktionsteile wie insbesondere eines Kühlers für die zu filternde Flüssigkeit sowie Drucksensoren ermöglicht.The invention is based on the problem with low effort even in the case of a reliable and low-maintenance, generic plastic-liquid filter in which by Materialund / or Manufacturing errors caused unintentionally under high Pressure fluid in a larger volume enters the collection room as this room can absorb without pressure increase. In addition, should formed the generic filter in a mold be a constructive rational integration of additional Functional parts such as in particular a cooler for allows the liquid to be filtered as well as pressure sensors.

Dieses Problem wird erfindungsgemäß bereits grundsätzlich mit den Merkmalen des Anspruches 1 gelöst.This problem is already according to the invention basically solved with the features of claim 1.

Der Zulaufkanal und der Rücklaufkanal liegen in einem Auffangraum mit einer Sicherheitswandung, die Teil des Filtergehäuses ist und den Zulaufkanal und den Rücklaufkanal radial umschließt. Wird das Flüssigkeitsfilter an einen Anschlußflansch, beispielsweise einen Motorblock einer Brennkraftmaschine, angeschlossen, ist die Sicherheit im Falle undichter Dichtungen erhöht, weil sowohl die zufließende Rohflüssigkeit als auch die abfließende Reinflüssigkeit doppelt gegen die Umgebung abgeschlossen sind: innerhalb des Zulauf- bzw. des Rücklaufkanals und außerdem innerhalb des Auffangraumes, dessen Wandung mit geringem Aufwand flüssigkeitsdicht mit dem Anschlußflansch verbunden werden kann. Außerdem kann in den Auffangraum eindringende Flüssigkeit durch den dort vorgesehenen Abfluß abfließen, wodurch in dem Auffangraum ein ungewollt hoher Druck sicher vermieden wird. Der Druck in dem Auffangraum ist begrenzt auf den Druck an dessen Abflußöffnung.The inlet channel and the return channel lie in a containment room with a safety wall, which is part of the filter housing and the inlet channel and encloses the return channel radially. Will the fluid filter to a connecting flange, for example a Engine block of an internal combustion engine, connected, the safety is increased in case of leaking seals, because both the incoming crude liquid as also the outflowing clean liquid twice against the Environment are completed: within the inlet or the return channel and also within the Collecting space, the wall with little effort liquid-tight connected to the connecting flange can be. In addition, in the catchment room penetrating liquid through the provided there Drain drain, causing in the collecting space an unintentionally high pressure safely avoided becomes. The pressure in the catchment room is limited to the pressure at its outlet.

Der Auffangraum kann auf Atmosphärendruck ausgelegt werden. Der Überdruck im zugeführten bzw. abgeführten Flüssigkeitsstrom wird vollständig vom Zulauf- bzw. Rücklaufkanal aufgenommen. Der Auffangraum bleibt hiervon unberührt, er fungiert als Sicherheitsreservoir für den Fall, daß Leckagen auftreten. Hierdurch müssen an die Dichtung zwischen der Sicherheitswandung und dem Anschlußflansch keine erhöhten Qualitätsanforderungen gestellt werden, das heißt es kann beispielsweise eine einfache O-Ring-Dichtung verwendet werden.The catchment room can be at atmospheric pressure be interpreted. The overpressure in the supplied or discharged liquid flow is completely from the inlet or return channel recorded. The catchment room remains unaffected, it acts as a security reservoir in the event that leaks occur. This will have to the seal between the safety wall and the connecting flange no elevated Quality requirements are made, that is For example, it can be a simple O-ring seal be used.

Das Filtergehäuse aus Kunststoff kann im Spritzgußverfahren in einem Guß mit ausreichender Maßgenauigkeit gefertigt werden, so daß eine Nachbearbeitung nicht mehr erforderlich ist. Außerdem wird ein erheblicher Gewichtsvorteil erzielt. Die im Filtergehäuse ausgebildeten Kanäle können relativ dickwandig ausgeführt werden, um die in der Flüssigkeit herrschenden Drücke aufzunehmen; zugleich kann die Sicherheitswandung dünnwandig ausgeführt werden, da im Auffangraum kein Überdruck anliegt.The filter housing made of plastic can in Injection molding in a casting with sufficient Dimensional accuracy can be made so that a post-processing is no longer necessary. In addition, a achieved considerable weight advantage. The in the filter housing trained channels can run relatively thick-walled become the ones prevailing in the liquid To absorb pressures; At the same time, the security wall can be executed thin-walled, as in the Collection chamber no pressure applied.

Vorteilhaft sind die Anschlüsse des Zulaufkanals und des Rücklaufkanals mit einer Radialdichtung versehen, um einen druck- und flüssigkeitsdichten Abschluß zwischen dem Filtergehäuse und dem Anschlußflansch zu erhalten. In Achsrichtung wirkende Haltekräfte werden im wesentlichen über die Sicherheitswandung des druckfreien Auffangraumes und insbesondere über verstärkt ausgebildete Befestigungsdome, in denen zweckmäßig Metallbuchsen aufgenommen sind, übertragen, so daß die Kanäle von hohen Achskräften entlastet sind und ein unerwünschtes Kriechverhalten des Kunststoffs im Bereich der Kanäle vermieden wird.Advantageously, the connections of the inlet channel and the return channel with a radial seal provided to a pressure and liquid-tight seal between the filter housing and the connecting flange to obtain. Acting in the axial direction Holding forces are essentially over the safety wall the pressure-free collecting space and in particular over reinforced fastening dome, in which appropriate metal bushes added are transferred, so that the channels of high Achskräften are relieved and an undesirable Creep behavior of the plastic in the area of the channels is avoided.

Die Radialdichtungen sind bevorzugt ballig ausgeführt, um axiale Toleranzen ausgleichen zu können. The radial seals are preferably spherical designed to compensate for axial tolerances can.

Durch die Verbindung des Auffangraums mit einem Ablaufkanal, wird über diesen Flüssigkeit, die in den Auffangraum ausgetreten ist, beispielsweise über undichte Radialdichtungen aus dem Zulaufkanal oder dem Rücklaufkanal, aus dem Auffangraum abgeleitet, insbesondere in die Ölwanne der Brennkraftmaschine. Wie bereits weiter oben dargelegt wird dadurch verhindert, daß der Auffangraum mit Flüssigkeit volläuft und sich im Auffangraum ein Überdruck aufbaut. Der Ablaufkanal verläuft im Anschlußflansch und ist über eine Ausnehmung im Anschlußflansch mit dem Auffangraum verbunden.By the connection of the collecting space with a drainage channel, is over this liquid, which in the collecting space has leaked, for example via leaking radial seals from the inlet channel or the return channel, derived from the collecting space, in particular in the oil pan of the internal combustion engine. As already explained above, this prevents that the collecting space is full of liquid and an overpressure builds up in the catchment area. The drainage channel runs in the connecting flange and is over a recess in the connecting flange with the collecting space connected.

Weiterhin kann im Auffangraum ein Überdruckventil vorgesehen sein, das vom Druck auf der Reinseite des Filters beaufschlagt wird und bei Überschreiten eines Grenzdrucks zum Auffangraum hin öffnet und dadurch eine Druckentlastung bewirkt. Die in den Auffangraum ausgetretene Flüssigkeit wird wiederum über den Ablaufkanal aus dem Auffangraum abgeleitet.Furthermore, in the collecting space a pressure relief valve be provided by the pressure on the Pure side of the filter is applied and when exceeded opens a boundary pressure to the collecting space and thereby causes a pressure relief. In the The liquid leaked from the collecting space will turn derived via the drainage channel from the collecting space.

Zweckmäßig enden die Stirnseiten der Kanäle jeweils in einem unterschiedlichen axialen Abstand, ebenso eine Gehäuseaufnahme, in die das Überdruckventil einsetzbar ist. Hierdurch wird eine Montageerleichterung erreicht, indem das Filtergehäuse mit einer annähernd gleichbleibenden axialen Montagekraft auf den Anschlußflansch aufgesetzt wird und nacheinander zunächst das am weitesten überstehende Bauteil und anschließend die weniger weit überstehenden Bauteile in entsprechende Aufnahmen im Anschlußflansch eingesetzt werden. Auf diese Weise wird auch verhindert, daß das Filtergehäuse bei der Montage verkantet.Appropriately end the end faces of the channels each at a different axial distance, as well a housing receptacle into which the pressure relief valve can be used. This is a mounting relief achieved by the filter housing with a approximately constant axial mounting force the connection flange is placed and successively first the most overhanging component and then the less protruding components used in corresponding receptacles in the connection flange become. This also prevents that the filter housing tilted during assembly.

Weitere Vorteile und zweckmäßige Ausführungsformen sind den weiteren Ansprüchen, der Figurenbeschreibung und den Zeichnungen zu entnehmen. Es zeigen:

Fig. 1
eine Seitenansicht eines Flüssigkeitsfilters,
Fig. 2
eine Ansicht gemäß Schnittlinie II-II aus Fig. 1,
Fig. 3
eine Ansicht gemäß Schnittlinie III-III aus Fig. 1,
Fig. 4
eine Ansicht gemäß Schnittlinie IV-IV aus Fig. 1.
Further advantages and expedient embodiments can be taken from the further claims, the description of the figures and the drawings. Show it:
Fig. 1
a side view of a liquid filter,
Fig. 2
a view along section line II-II of Fig. 1,
Fig. 3
a view along section line III-III of Fig. 1,
Fig. 4
a view along section line IV-IV of FIG. 1.

Gemäß Fig. 1 ist das Flüssigkeitsfilter 1, das zweckmäßig zur Filterung von Öl oder Kraftstoff in einer Brennkraftmaschine eingesetzt wird, mit dem aus Kunststoff bestehenden Filtergehäuse 2 auf einen Anschlußflansch 18, insbesondere einen Motorblock einer Brennkraftmaschine, aufgesetzt. Die zu reinigende Flüssigkeit wird mit Überdruck über den Anschlußflansch 18 durch eine Rohflüssigkeitsleitung 25 über einen Zulaufkanal im Filtergehäuse 2 zunächst einem oberhalb des Filters 1 angeordneten Ölkühler 24 zugeführt und anschließend durch einen Filterkörper 3 geleitet, der sich in einem seitlichen, radial nach außen gerichteten zylindrischen Abschnitt 26 des Filtergehäuses 2 befindet. Nach der Reinigung strömt die Reinflüssigkeit über einen Rücklaufkanal im Filtergehäuse 2 zurück in eine Reinleitung 17 im Anschlußflansch 18.1, the liquid filter 1, the suitable for filtering oil or fuel in one Internal combustion engine is used, with the off Plastic existing filter housing 2 on a connecting flange 18, in particular an engine block a Internal combustion engine, mounted. The to be cleaned Liquid will overpressure over Connecting flange 18 through a raw liquid line 25 via an inlet channel in the filter housing 2 first an oil cooler 24 arranged above the filter 1 fed and then through a filter body. 3 directed, in a lateral, radially outward directed cylindrical portion 26 of the filter housing 2 is located. After cleaning, the clean liquid flows via a return channel in the filter housing 2 back in a clean line 17 in the connection flange 18th

Der zylindrische Abschnitt 26 mit dem Filterkörper 3 ist von einem abnehmbaren Deckel 27 verschlossen. Das Filtergehäuse 2, der Anschlußflansch 18 und der Ölkühler 24 sind über Schrauben 29 zusammengehalten, die in Befestigungsdomen 20, welche einteilig mit dem Filtergehäuse ausgebildet sind, geführt sind; zur Erhöhung der Stabilität können in den Befestigungsdomen 20 Metallbuchsen eingespritzt sein. Am Ölkühler 24 sind Anschlüsse 28 für die Zu- und Abfuhr von Wärmetauschermedium angeordnet. Der Ölkühler 24 trägt zur Stabilisierung und Verstärkung des Filters 1 bei.The cylindrical portion 26 with the filter body 3 is closed by a removable lid 27. The filter housing 2, the connecting flange 18 and the oil cooler 24 are held together by screws 29, those in attachment domes 20, which are integrally formed with the filter housing, guided are; To increase the stability can in the attachment domes 20 metal bushings to be injected. At the Oil cooler 24 are connections 28 for the supply and discharge arranged by heat exchange medium. The oil cooler 24 contributes to the stabilization and reinforcement of the filter 1 at.

Fig. 2 ist die Zufuhr der ungereinigten Flüssigkeit in das Filtergehäuse 2 zu entnehmen. Die ungereinigte Flüssigkeit strömt über die radial nach innen geführte Rohflüssigkeitsleitung 25 im Anschlußflansch 18 bis zu einer Ausnehmung im Anschlußflansch 18, in die der vertikal verlaufende Zulaufkanal 4 im Filtergehäuse 2 eingesteckt ist. Im Bereich des Anschlusses 8 des Zulaufkanals 4 ist eine Radialdichtung 10 angeordnet, mittels der ein flüssigkeitsdichter Abschluß zwischen dem Zulaufkanal 4 und der Ausnehmung im Anschlußflansch 18 geschaffen ist. Die Radialdichtung 10 ist bevorzugt ballig ausgeführt, um axiale Toleranzen auszugleichen.Fig. 2 is the supply of the unpurified liquid to remove in the filter housing 2. The uncleaned Liquid flows over the radially inward guided Raw liquid line 25 in the connection flange 18th up to a recess in the connecting flange 18, in the the vertically extending inlet channel 4 in the filter housing 2 is inserted. In the area of connection 8 of the inlet channel 4, a radial seal 10 is arranged by means of the a liquid-tight seal between the Inlet channel 4 and the recess in the connection flange 18 is created. The radial seal 10 is preferred crowned to compensate for axial tolerances.

Im Zulaufkanal 4 ist ein Rücklauf-Sperrventil 19 angeordnet, um einen Rückfluß der zu reinigenden Flüssigkeit zurück in die Rohflüssigkeitsleitung 25 zu verhindern.In the inlet channel 4 is a return check valve 19 arranged to a reflux of the to be cleaned Liquid back into the raw liquid line 25 to prevent.

Die Rohflüssigkeit strömt in Pfeilrichtung weiter nach oben in den Ölkühler 24, in dem die Flüssigkeit temperiert, d.h. je nach Anwendungsfall gekühlt oder erwärmt wird. Im Bereich des Anschlusses des Ölfilters 24 an den Zulaufkanal 4 ist eine Radialdichtung 34 angeordnet.The raw liquid continues to flow in the direction of the arrow up into the oil cooler 24, where the liquid tempered, i. cooled or heated depending on the application becomes. In the area of the connection of the oil filter 24 to the inlet channel 4, a radial seal 34 is arranged.

Der Zulaufkanal 4 liegt in einem ringförmigen Auffangraum 6 mit einer Sicherheitswandung 7, die Teil des Filtergehäuses 2 ist und den Zulaufkanal 4 radial einschließt. Der Auffangraum 6 ist drucklos ausgebildet und steht in Verbindung mit einer Ausnehmung 30 im Anschlußflansch 18, die in radial verlaufende Ablaufkanäle 23 mündet, welche zur Ölwanne der Brennkraftmaschine führen. Die Ablaufkanäle 23 können parallel verlaufen und unterschiedlich große Durchmesser haben.The inlet channel 4 is located in an annular Collection room 6 with a safety wall 7, the part of the filter housing 2 and the inlet channel 4 radially includes. The collecting space 6 is formed without pressure and communicates with a recess 30 in FIG Connecting flange 18, which in radially extending drainage channels 23, which leads to the oil pan of the internal combustion engine to lead. The drainage channels 23 can run parallel and have different diameters.

Die Stirnseite 12 der Sicherheitswandung 7 greift in eine kreisförmige Aussparung auf der Oberseite des Anschlußflansches 18 ein, wobei im Bereich der Stirnseite 12 der Sicherheitswandung 7 zwischen der Wand der Aussparung und der Sicherheitswandung eine O-Ring-Dichtung 13 angeordnet ist, um den Auffangraum 6 gegen die Umgebung flüssigkeitsdicht abzuschließen.The front side 12 of the safety wall 7 engages in a circular recess on the top of the connecting flange 18, wherein in the region of End face 12 of the safety wall 7 between the Wall of recess and security wall one O-ring seal 13 is arranged around the collecting space 6 to complete liquid-tight against the environment.

Bei einer Leckage des im Auffangraum 6 eingeschlossenen Zulaufkanals 4 bzw. der Radialdichtung 10 des Zulaufkanals 4 strömt austretende Flüssigkeit in den drucklosen Auffangraum 6 und wird nach unten über die Ausnehmung 30 und den Ablaufkanal 23 abgeführt. Es wird dadurch verhindert, daß Flüssigkeit in die Umgebung gelangen kann.In case of leakage in the collecting space 6 enclosed Inlet channel 4 and the radial seal 10 of the inlet channel 4 flows into the exiting liquid the pressure-free collecting space 6 and is down discharged via the recess 30 and the drain channel 23. It is thereby prevented that liquid in the environment can get there.

Fig. 3 ist die Ableitung der Flüssigkeit aus dem Filtergehäuse 2 zu entnehmen. Nach Kühlung der Flüssigkeit im Ölkühler 24 ist die Flüssigkeit dem Filterkörper in dem zylindrischen Abschnitt 26 des Filtergehäuses 2 zugeführt. Nach der Filterung strömt die gereinigte Flüssigkeit aus dem radial innenliegenden Abströmraum 33 des Filterkörpers in den Rücklaufkanal 5, welcher im Filtergehäuse 2 ausgebildet ist und sich in vertikaler Richtung erstreckt. Der Rücklaufkanal 5 weist im Bereich seines Anschlusses 9 eine Radialdichtung 11 auf, die in eine Ausnehmung 31 im Anschlußflansch 18 einragt und den Rücklaufkanal 5 mit dem Anschlußflansch 18 druck- und flüssigkeitsdicht verbindet. Die Ausnehmung 31 mündet in eine horizontal verlaufende Reinleitung 17, über die die gereinigte Flüssigkeit radial aus dem Anschlußflansch 18 geführt ist und beispielsweise bei Verwendung von Öl als Flüssigkeit zur Schmierung von Lagerstellen genutzt werden kann.Fig. 3 is the derivative of the liquid from the Remove filter housing 2. After cooling the liquid in the oil cooler 24, the liquid is the filter body in the cylindrical portion 26 of the filter housing second fed. After filtering, the purified liquid flows from the radially inner outflow space 33 of the filter body in the return channel 5, which in the filter housing 2 is formed and extending in the vertical direction extends. The return channel 5 has in the area its connection 9 a radial seal 11, which in a recess 31 in the connecting flange 18 protrudes and the return passage 5 with the connecting flange 18th pressure and fluid tight connects. The recess 31 flows into a horizontal clean line 17, over which the purified liquid radially out of the Connecting flange 18 is guided and, for example at Use of oil as a liquid for lubrication of Storage locations can be used.

In den Rücklaufkanal 5 ragt radial ein Anschlußstück 22 ein, über das der Druck im Rücklaufkanal 5 einem Drucksensor 21 und einem Turboladeranschluß zuführbar ist.In the return passage 5 projects radially a fitting 22, via which the pressure in the return channel 5 a pressure sensor 21 and a turbocharger port can be fed.

Das Anschlußstück 22 ist in einen Stutzen 35 eingeschoben und in diesem Stutzen über eine Radialdichtung 36 gedichtet. Die Fixierung des Anschlußstükkes 22 an dem Stutzen 35 kann durch einen Bajonettverschluß erzielt werden. Hierfür ist es lediglich erforderlich, daß an dem Anschlußstück 22 und dem Stutzen 35 miteinander in Eingriff bringbare Bajonettverschlußmittel vorgesehen sind. Der Bajonettverschluß kann insbesondere derart ausgebildet sein, daß er durch ein Verrasten der Bajonett-Verschlußmittel, ohne diese gegeneinander verdrehen zu müssen, geschlossen werden kann. Im Inneren des Filtergehäuses 2 dient das Anschlußstück 22 zur Fixierung des Rücklaufkanales 5. Die Verbindung zwischen dem Rücklaufkanal 5 und dem Anschlußstück 22 erfolgt dadurch, daß an einem Ende der Ringwand des Rücklaufkanales 5 ein axialer Schlitz 37 vorgesehen ist, in den ein von dem Anschlußstück 22 ausgehendes Formstück schnappverschlußartig einschiebbar ist.The connector 22 is in a socket 35th inserted and in this nozzle via a radial seal 36 sealed. The fixation of the connecting piece 22 on the nozzle 35 can by a bayonet lock be achieved. For this it is only necessary that on the connecting piece 22 and the nozzle 35 engageable with each other Bayonet closure means are provided. The bayonet lock may in particular be designed in such a way that he by latching the bayonet closure means, without having to twist them against each other, can be closed. Inside the filter housing 2 is the connecting piece 22 for fixing the Return channel 5. The connection between the Return channel 5 and the connector 22 is carried out by that at one end of the annular wall of the return channel 5 an axial slot 37 is provided in the an outgoing from the fitting 22 fitting snap-in style is inserted.

Durch die vorstehend beschriebenen Verbindungsarten zwischen dem Anschlußstück 22 und dem Stutzen 35 einerseits sowie zwischen dem Rücklaufkanal 5 und dem Anschlußstück 22 andererseits sind bei dem erfindungsgemäßen Gegenstand lediglich fertigungstechnisch einfach erzeugbare Schiebeverbindungen vorhanden. Durch eine Schiebeverbindung mit einer Radialdichtung und einem Bajonettverschluß kann auch der Drucksensor 2 mit dem Anschlußstück 22 in vorteilhafter Weise verbunden sein. In gleicher Weise können auch noch andere Funktionsteile mit dem Filtergehäuse fluidführend verbunden werden.By the connection types described above between the connector 22 and the Stutzen 35 on the one hand and between the return channel 5 and the connector 22 on the other hand are at the subject invention only manufacturing technology easy to produce sliding joints available. By a sliding connection with a Radial seal and a bayonet lock can also the pressure sensor 2 with the connector 22 in be connected advantageously. In the same way can also have other functional parts with the filter housing be connected fluidly.

Parallel zum Rücklaufkanal 5 ist ein Überdruckventil 15 angeordnet, das in einer einteilig mit dem Filtergehäuse 2 ausgebildeten Gehäuseaufnahme 16 sitzt. In geschlossenem Zustand verschließt das Überdruckventil 15 eine mit dem Auffangraum 6 kommunizierende Ausnehmung 32 im Anschlußflansch 18, welche den Auffangraum 6 mit der Reinleitung 17 verbindet, so daß bei geschlossenem Überdruckventil 15 die Verbindung zwischen der Reinleitung 17 und dem Auffangraum 6 unterbrochen ist. Oberhalb eines Grenzdruckes in der Reinleitung 17 öffnet das Überdruckventil 15, indem der in Schließstellung federbelastete Ventilkörper des Überdruckventils 15 zurückweicht und die Verbindung zwischen der Ausnehmung 32 und dem Auffangraum 6 freigibt, so daß Flüssigkeit aus der Reinleitung 17 in den Auffangraum 6 strömen kann und ein Überdruck in der Reinleitung 17 abgebaut wird. Die in den Auffangraum 6 entwichene Flüssigkeit kann über die in Fig. 2 dargestellte, mit dem Auffangraum 6 kommunizierende Ausnehmung 30 im Anschlußflansch 18 abfließen.Parallel to the return channel 5 is a pressure relief valve 15 arranged in one piece with the Filter housing 2 formed housing receptacle 16th sitting. When closed, the pressure relief valve closes 15 a communicating with the receiving space 6 Recess 32 in the connection flange 18, which connects the collecting space 6 with the clean line 17, so that when the pressure relief valve 15 is closed Connection between the clean line 17 and the collecting space 6 is interrupted. Above a limit pressure in the clean line 17 opens the pressure relief valve 15, by the spring-loaded valve body in the closed position the pressure relief valve 15 recedes and the Connection between the recess 32 and the Collection chamber 6 releases so that liquid from the clean line 17 can flow into the collecting space 6 and a Overpressure in the clean line 17 is reduced. In the the collecting space 6 escaped liquid can over the illustrated in Fig. 2, communicating with the collecting space 6 Recess 30 in the connection flange 18th flow away.

Der Rücklaufkanal 5, die Gehäuseaufnahme 16 und der in Fig. 2 dargestellte Zulaufkanal 4 verlaufen parallel zueinander. Die Stirnseiten der Kanäle 4, 5, der Gehäuseaufnahme 16 und zweckmäßig auch der Sicherheitswandung 7 enden axial vorteilhaft in unterschiedlichem Abstand.The return channel 5, the housing receptacle 16 and the inlet channel 4 shown in FIG. 2 run parallel to each other. The front sides of the channels 4, 5, the Housing receptacle 16 and expedient and the safety wall 7 end axially advantageous in different Distance.

Der Darstellung gemäß Fig. 4 ist zu entnehmen, daß der Zulaufkanal 4 mit dem Rücklauf-Sperrventil 19, der Rücklaufkanal 5, das Überdruckventil 15 in der Gehäuseaufnahme 16 (Fig. 3) und die Ausnehmung 30 im Anschlußflansch alle radial innerhalb der zylindrischen Sicherheitswandung 7 liegen, die den Auffangraum 6 begrenzt. Bei einem Überdruck in der in Fig. 3 dargestellten Reinleitung 17 strömt die Flüssigkeit über das Überdruckventil 15 in den Auffangraum 6 und fließt über die Ausnehmung 30 wieder ab.The illustration according to FIG. 4 can be seen that the inlet channel 4 with the return check valve 19, the return channel 5, the pressure relief valve 15th in the housing receptacle 16 (Figure 3) and the recess 30 in the connecting flange all radially within the cylindrical safety wall 7 lie, which the collecting space 6 limited. At an overpressure in the in Fig. 3 illustrated clean line 17 flows the liquid via the pressure relief valve 15 into the collecting space 6 and flows through the recess 30 again.

Die Sicherheitswandung 7 liegt innerhalb einer Gehäuse-Außenwand 14. Die Befestigungsdome 20 markieren Eckpunkte in der Außenwand 14; es sind insgesamt vier Befestigungsdome 20 vorgesehen, die zusammen ein Rechteck bilden.The safety wall 7 lies within one Housing outer wall 14. The Befestigungsdome 20 mark corner points in the outer wall 14; there are in total four fastening domes 20 are provided, which together to form a rectangle.

Claims (14)

  1. Liquid filter, in particular an oil or fuel filter in an internal combustion engine, having a filter body (3) made of plastic and held in a filter housing (2), a feed channel (14) supplying unfiltered liquid, a return channel (5) taking away clean liquid, for tightly placing onto a connecting flange (18), the feed channel (4) and the return channel (5) being arranged in a collecting space (6) in the filter housing, and the collecting space (6) being bounded by a safety wall (7) which fits radially around the feed channel (4) and the return channel (5), is formed integrally together with the filter housing (2) and is to be sealed with respect to the connecting flange (18) by means of a seal (13), characterized in that the collecting space (6) has a discharge channel (23).
  2. Liquid filter according to Claim 1, characterized in that a pressure relief valve (15) which communicates with a clean conduit (17) provided in the connecting flange (18) and opens towards the collecting space (6) is arranged in the collecting space (6).
  3. Liquid filter according to Claim 1 or 2, characterized in that a respective radial seal (10, 11) is arranged in the region of the connections (8, 9) of the feed channel (4) and of the return channel (5).
  4. Liquid filter according to Claim 3, characterized in that the radial seals (10, 11) are of spherical design.
  5. Liquid filter according to one of the preceding claims, characterized in that the seal (13), which interacts with the safety wall (7), is effective in the region of the open end side (12) of the safety wall (7).
  6. Liquid filter according to one of the preceding claims, characterized in that the pressure relief valve (15) is held in a housing receptacle (16) of the filter housing (2).
  7. Liquid filter according to one of the preceding claims, characterized in that the channels (4, 5) and the housing receptacle (16) run approximately parallel in the region of the collecting space (6).
  8. Liquid filter according to one of the preceding claims, characterized in that a non-return valve (19) is arranged in the feed channel (4).
  9. Liquid filter according to one of the preceding claims, characterized in that the filter housing (2) has fastening domes (20) of reinforced design.
  10. Liquid filter according to Claim 9, characterized in that metal bushings are accommodated in the fastening domes (20).
  11. Liquid filter according to one of the preceding claims, characterized in that a pressure sensor (21) is provided to determine the pressure in the return channel (5).
  12. Liquid filter according to Claim 11, characterized in that a connecting piece (22) which is connected to the return channel (5) is arranged in order to hold the pressure sensor (21).
  13. Liquid filter according to one of the preceding claims, characterized in that the filter (1) is assigned an oil cooler (24) for cooling the liquid to be cleaned.
  14. Liquid filter according to Claim 13, characterized in that the fastening of the filter housing (2) serves at the same time as the fastening of the oil cooler (24).
EP99911588A 1998-02-04 1999-02-01 Filter for fluids Expired - Lifetime EP1067999B9 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19804329A DE19804329A1 (en) 1998-02-04 1998-02-04 Liquid filter
DE19804329 1998-02-04
PCT/DE1999/000332 WO1999039802A1 (en) 1998-02-04 1999-02-01 Filter for fluids

Publications (4)

Publication Number Publication Date
EP1067999A1 EP1067999A1 (en) 2001-01-17
EP1067999B1 EP1067999B1 (en) 2002-01-16
EP1067999B2 true EP1067999B2 (en) 2004-07-28
EP1067999B9 EP1067999B9 (en) 2005-01-05

Family

ID=7856597

Family Applications (1)

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EP99911588A Expired - Lifetime EP1067999B9 (en) 1998-02-04 1999-02-01 Filter for fluids

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Country Link
US (1) US6379537B1 (en)
EP (1) EP1067999B9 (en)
DE (2) DE19804329A1 (en)
ES (1) ES2172312T3 (en)
WO (1) WO1999039802A1 (en)

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Also Published As

Publication number Publication date
DE19804329A1 (en) 1999-08-05
EP1067999A1 (en) 2001-01-17
US6379537B1 (en) 2002-04-30
ES2172312T3 (en) 2002-09-16
EP1067999B1 (en) 2002-01-16
WO1999039802A1 (en) 1999-08-12
DE59900637D1 (en) 2002-02-21
EP1067999B9 (en) 2005-01-05

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