EP4543561A1 - Filterelement - Google Patents
FilterelementInfo
- Publication number
- EP4543561A1 EP4543561A1 EP23733258.0A EP23733258A EP4543561A1 EP 4543561 A1 EP4543561 A1 EP 4543561A1 EP 23733258 A EP23733258 A EP 23733258A EP 4543561 A1 EP4543561 A1 EP 4543561A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sealing device
- filter element
- filter
- sealing
- element according
- 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.)
- Pending
Links
Classifications
-
- 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
- B01D29/13—Supported filter elements
- B01D29/15—Supported filter elements arranged for inward flow filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/29—Filter cartridge constructions
- B01D2201/291—End caps
- B01D2201/295—End caps with projections extending in a radial outward direction, e.g. for use as a guide, spacing means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/30—Filter housing constructions
- B01D2201/301—Details of removable closures, lids, caps, filter heads
- B01D2201/302—Details of removable closures, lids, caps, filter heads having inlet or outlet ports
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/34—Seals or gaskets for filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/34—Seals or gaskets for filtering elements
- B01D2201/347—Radial sealings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/40—Special measures for connecting different parts of the filter
- B01D2201/4007—Use of cam or ramp systems
Definitions
- the invention relates to a filter element with an element material that comprises a cavity, in particular in the form of a filtrate space, and that extends between two end caps arranged at the ends, each of which has a sealing device.
- DE 10 2018 009 187 A1 discloses a filter device with a filter housing and a filter element accommodated therein, the element material of which extends between two end caps, of which at least one end cap is mounted on an element receptacle by means of a spherical bearing which provides more than one degree of freedom This ensures that the filter element is mounted in an articulated manner on the element holder via its one end cap. This makes it possible to compensate for possible offset errors, so that a reduction in the narrow tolerance limits that must be maintained for production is made possible and filter devices can therefore be manufactured reliably and with low manufacturing costs, even with long filter elements or with assembled filter housings.
- the filter element is in the operating position with its lower end cap defined in a housing-side receptacle via a screw thread forming a seal and on its other, opposite end cap is guided in a longitudinally movable manner by means of an O-sealing ring along a socket-shaped element holder on the housing head of the filter housing.
- Such filter devices and their filter elements are sometimes very heavily stressed in rough everyday operation, for example when such solutions are used as part of a hydraulic hammer operation in which the filter element is regularly loaded by strong hydraulic pulsations. Because in the known solution one end of the filter element is fixed in a stationary manner in the housing via the thread, the strong pulsations that occur particularly in hammer operation with the associated high differential forces on the filter element can definitely damage it.
- the invention is therefore based on the object of further improving the known filter element solutions in such a way that trouble-free operation is possible even when the filter element is under heavy load, in particular when hydraulic pressure pulsations occur.
- a filter element with the features of patent claim 1 solves this task in its entirety.
- one sealing device has a preferably polygonal opening cross-section and the other sealing device has a preferably circular opening cross-section and that one sealing device is part of a spherical bearing, any offset errors that may occur can still be compensated for via the spherical bearing
- end caps that are “open” towards the inside are created on the element via the free opening cross sections of the respective sealing device, which leads to a reduction in the pressure difference areas on the element, unlike in the known case when one end cap is open and the other end cap is closed
- any forces that may occur are axial Direction of the element is significantly minimized, so that failure-free operation is possible even when high stresses occur. This has no equivalent in the prior art. Due to the different opening cross-sections, preferably polygonal and circular, possible incorrect installation is prevented when an element is replaced with a new element, since there is only one plausible installation option and, in addition, counterfeit protection is implemented, both of which benefit functionally reliable operation.
- the two sealing devices each have an inner circumferential sealing surface which, when viewed in a fictitious projection parallel to the longitudinal axis of the filter element, is congruent with one another.
- a possible pressure difference area is then further minimized, so that the forces that occur during operation can in no way damage the filter element and in particular the element material.
- one sealing device has an annular groove on the outer circumference, into which the other shell part engages with an inner edge.
- the one polygonal sealing device forms a regular polygon, preferably a square, on the inside circumference, that individual wall parts protrude convexly outwards between the rounded corner points formed in this way with the same curvature, and that preferably the The greatest curvature of one of the wall parts is smaller than the smallest curvature of one of the rounded corners.
- the polygonal sealing device has an extremely inherently stable structure and is able to safely absorb forces when viewed in the radial transverse direction without the sealing effect being impaired.
- this one sealing device has a flat sealing surface on the inside circumference, which opens along slopes at the end when viewed in the direction of the longitudinal axis of the filter element. In this way, a defined, central sealing surface is generated, which carries out the sealing without the sealing effect being overdetermined by other components of the sealing device.
- the other sealing device is formed from an O-sealing ring, this O-sealing ring preferably being chambered by sheet metal parts of the other end cap, in particular except for an exposed sealing surface. Accordingly, both sealing devices are designed in such a way that they are guided in a longitudinally movable manner along guide parts, so that depending on the setting of the pressure situation, the element can move along the guide parts into a suitable, largely force-free position.
- the invention further relates to a filter device for receiving a filter element as presented above, wherein in a housing part of a filter housing, usually in the form of a filter head, a guide part with a cylindrical outer peripheral surface for the system with the one sealing device is accommodated and in a releasably connectable to this housing part Another housing part, regularly in the form of a filter pot, a further guide part with a cylindrical outer peripheral surface is accommodated for the system with the further sealing device. In this way, an inherently stable positioning of the filter element is achieved by means of the guide parts to the housing parts of the filter device.
- one guide part is formed from a sleeve, along the outside of which the one sealing device is guided in a longitudinally movable manner, and that the other guide part is formed from a cup-shaped insert, which is designed as a locking part and can be locked with the other housing part, and its outer peripheral surface forms a longitudinal guide for the other sealing device.
- Largely turbulence-free fluid flows for filtration with the filter element can be guided through the filter housing via the relevant sleeve and the cup-shaped insert.
- Fig. 1 is a perspective view of a longitudinal section of a filter device
- FIG. 2 shows the top and bottom area of the filter device according to FIG. 1;
- Fig. 4 shows the spherical bearing arrangement of a filter element according to
- FIG. 5 shows a perspective view of a sealing device for the filter element in the area of the spherical bearing according to FIGS. 1, 2 and 4.
- Fig. 1 shows a filter device as a whole in a longitudinal section.
- the filter device according to FIG. 1 has a filter head 10 and a filter pot 12, which is releasably screwed to the filter head 10 in a known manner.
- the filter device according to FIG. 1 is shown in its usual, vertical operating position and the filter head 10 is permanently connected in a stationary manner to a hydraulic supply circuit (not shown) in a fluid-carrying manner.
- the filter head 10 has an inlet 14 for a non-filtrate stream and an outlet 16 for a filtrate stream. Both inlet 14 and outlet 16 are connected in the usual way to the mentioned hydraulic supply circuit.
- a spring-loaded bypass valve 18 is connected between the inlet 14 and the outlet 16, which opens when the filter element is clogged or blocked in the filter device and, bypassing the filter element, directly connects the inlet 14 to the outlet 16, so that the fluid flow within the supply circuit does not break off.
- the relevant structure is common in such filter devices, so it will not be discussed in more detail here.
- the filter element accommodated in the filter device has a radial distance from the inner circumferential side of the filter housing 20, so that the relevant inner circumferential side and the outer circumferential side of the filter element delimit an unfiltrate space 36 with one another within the filter housing 20, which extends in the direction of the filter head 10 via a channel-like fluid connection 38 in Filter head 10 is connected to the inlet 14.
- the filtrate chamber 26, on the other hand, is connected to the outlet 16 for filtrate flow, with the further fluid connection 39 being guided past the bypass valve 18. Accordingly, the element material 22 is flowed through from the outside to the inside when viewed in the direction of FIG. 1 and any particle contamination present in the fluid flow is reliably cleaned off by the element material 22.
- one sealing device 32 is designed with a polygonal opening cross section 40 and, in particular according to the illustration in FIG. 3, the other sealing device 34 delimits a circular opening cross section 42.
- the one sealing device 32 is part of a spherical seal 44 for the filter element with its element material 22.
- the filter element are congruent with one another. In this way, effective differential pressure surfaces are minimized and a force-free support of the filter element within the filter housing 20 of the filter device is largely achieved.
- the spherical support 44 has two shell parts 50, 52, of which one shell part 50 is stationarily received on one end cap 28, the other shell part 52, which is one Sealing device 32, which is pivotally accommodated in a shell part 50.
- a shell part 50 can slide in an articulated manner along the convex outer peripheral side of the other shell part 52 with more than one degree of freedom.
- the convex outer peripheral surface of the other shell part 52 nestles against the correspondingly concave inner peripheral side of the one shell part 50.
- the filter element with its element material 22 is then pivotally arranged on the other shell part 52 as seen in different angular directions to the longitudinal axis of the filter element and can thus compensate for any offset errors that may occur.
- One sealing device 32 has an annular groove 56 on the outer circumference, into which the other shell part 52 engages with a protruding inner edge 58, as shown in FIG a predeterminable projection into the filtrate space 26, with a predeterminable radial distance from the inner circumferential side of the support tube 24 in this area.
- the end cap 28 with its cylindrical outer edge and the inner boundary wall 60 forms a trough-shaped receiving space for an adhesive bed 62, not shown, which serves to fix the end cap 28 to the free front ends of the element material 22 and support tube 24.
- the one polygonal sealing device 32 forms a square with four corner points 64 on the inner circumference, with individual wall parts 66 convexly convex between the rounded corner points 64 formed in this way with the same curvature projecting on the outside.
- the relevant sealing ring with a polygonal opening cross-section has a substantially flat, annular sealing surface 68 on the inner circumference, formed from the corner points 64 and the wall parts 66, which opens out along slopes 70, 72 at the end, viewed in the direction of the fictitious longitudinal axis of the filter element.
- the actual sealing surface 68 is “cut free” and thus forms a sliding surface in a sealing manner for sliding along the outer circumferential side of the head-side sleeve 54, which can be seen in particular from the illustration in FIG.
- the upper end cap 28 is guided axially movably along the sleeve 54 via the spherical bearing 44 and the one sealing device 32 and is correspondingly supported when viewed in the radial direction.
- the sleeve 54 is in any case accommodated in a stationary manner in a head-side recess as part of the further fluid guide 39 in the filter head 10.
- the sleeve 54 forms a guide part 74, along the outside of which the sealing device 32 is guided in a longitudinally movable manner.
- the other sealing device as shown in FIG.
- the other end cap 30 is formed from an elastomeric O-ring 76, which is chambered by sheet metal parts 78 of the other end cap 30, except for its inwardly exposed sealing surface 48.
- the other end cap 30 is formed from a sheet metal part and in turn has a sleeve part 80 which projects in the direction of the filtrate space 26 and which in turn serves, together with the annular outer wall of the end cap 30, to accommodate a further adhesive bed 82 (not shown), with which the lower end regions of element material 22 and support tube 24 can be defined in a defined manner on the other end cap 30.
- a further guide part 84 which is formed from a cup-shaped insert 86, which is designed as a locking part and is locked on the bottom side with the other housing part in the form of the filter cup 12.
- the cup-shaped insert 86 has On the circumference side there is again a cylindrical, self-contained outer circumferential surface 88, which forms a longitudinal guide for the other sealing device 34 shown with the O-sealing ring 76. 1, on both opposite sides of the filter element, it is guided axially movably along the respective guide parts 74, 84 by means of the two sealing devices 32, 34, so that the filter element can be self-supporting depending on the pressure-applying forces within it Filter housing 20 can be positioned independently.
- the further guide part 84 has circular recesses 85 on the bottom side; However, since the pot-like further guide part 84 is designed to be closed in the direction of the filtrate space 26, no unfiltrate can reach the filtrate side in this area, unless the unfiltrate flows through the element material 22 of the filter element and passes through the support tube 24, which represents the usual filter operation.
- both end caps 28, 30 must be reliably sealed, which is easily possible using the sealing devices 32, 34 mentioned. Since one sealing device 32 is clipped to the spherical bearing 44 of one end cap 28 and the O-sealing ring 76 of the other sealing device 34 is guided in sheet metal parts 78 of the other end cap 30, the sealing devices 32, 34 do not need to be glued, which means production for the filter element can be made easier and more cost-effective.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022002290.7A DE102022002290A1 (de) | 2022-06-24 | 2022-06-24 | Filterelement |
| PCT/EP2023/065830 WO2023247270A1 (de) | 2022-06-24 | 2023-06-13 | Filterelement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4543561A1 true EP4543561A1 (de) | 2025-04-30 |
Family
ID=86904213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23733258.0A Pending EP4543561A1 (de) | 2022-06-24 | 2023-06-13 | Filterelement |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP4543561A1 (de) |
| JP (1) | JP2025519906A (de) |
| CN (1) | CN223439289U (de) |
| DE (1) | DE102022002290A1 (de) |
| WO (1) | WO2023247270A1 (de) |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6235194B1 (en) * | 2000-03-08 | 2001-05-22 | Parker-Hannifin Corporation | Recharge and filter assembly with replaceable cartridge |
| US6571962B2 (en) * | 2001-04-30 | 2003-06-03 | Fleetguard, Inc. | Cartridge filter element with housing seal retainer |
| EP2941578B1 (de) | 2013-01-04 | 2026-02-04 | Baldwin Filters, Inc. | Dreiteilige endkappe und filterelement damit |
| DE102014005348B4 (de) | 2014-04-11 | 2021-07-29 | Mann+Hummel Gmbh | Filterelement eines Filters und Filter |
| DE102015007692A1 (de) | 2015-06-09 | 2016-12-15 | Rt-Filtertechnik Gmbh | Filterelement |
| DE102015007691A1 (de) * | 2015-06-09 | 2016-12-15 | Rt-Filtertechnik Gmbh | Filtervorrichtung |
| US10625184B2 (en) * | 2015-11-03 | 2020-04-21 | MANN+HUMMEL Filtration Technology Group Inc. | Coalescing filter element |
| PL3423168T3 (pl) * | 2016-03-02 | 2024-05-13 | Donaldson Company, Inc. | Wkład filtrujący |
| EP3520871B1 (de) | 2018-01-31 | 2021-11-24 | Hengst SE | Filterkartusche und filterhalter für die filterkartusche |
| DE102018009187A1 (de) | 2018-11-23 | 2020-05-28 | Hydac Filtertechnik Gmbh | Filtervorrichtung |
-
2022
- 2022-06-24 DE DE102022002290.7A patent/DE102022002290A1/de active Pending
-
2023
- 2023-06-13 CN CN202390000424.0U patent/CN223439289U/zh active Active
- 2023-06-13 EP EP23733258.0A patent/EP4543561A1/de active Pending
- 2023-06-13 JP JP2024575396A patent/JP2025519906A/ja active Pending
- 2023-06-13 WO PCT/EP2023/065830 patent/WO2023247270A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| JP2025519906A (ja) | 2025-06-26 |
| DE102022002290A1 (de) | 2024-01-04 |
| WO2023247270A1 (de) | 2023-12-28 |
| CN223439289U (zh) | 2025-10-17 |
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Legal Events
| Date | Code | Title | Description |
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| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| 17P | Request for examination filed |
Effective date: 20250124 |
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| AK | Designated contracting states |
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| DAV | Request for validation of the european patent (deleted) | ||
| DAX | Request for extension of the european patent (deleted) | ||
| STAA | Information on the status of an ep patent application or granted ep patent |
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| 17Q | First examination report despatched |
Effective date: 20251006 |