WO2007085427A1 - Filter element with connecting element - Google Patents

Filter element with connecting element Download PDF

Info

Publication number
WO2007085427A1
WO2007085427A1 PCT/EP2007/000579 EP2007000579W WO2007085427A1 WO 2007085427 A1 WO2007085427 A1 WO 2007085427A1 EP 2007000579 W EP2007000579 W EP 2007000579W WO 2007085427 A1 WO2007085427 A1 WO 2007085427A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
sealing
connection
filter medium
medium
Prior art date
Application number
PCT/EP2007/000579
Other languages
German (de)
French (fr)
Inventor
Eckart Driesen
Roland Dobner
Dieter Hintenlang
Holger Leubner
Karl-Heinz Spies
Jochen Zabold
Original Assignee
Carl Freudenberg Kg
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to DE200610003949 priority Critical patent/DE102006003949B4/en
Priority to DE102006003949.1 priority
Application filed by Carl Freudenberg Kg filed Critical Carl Freudenberg Kg
Publication of WO2007085427A1 publication Critical patent/WO2007085427A1/en

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters, i.e. particle separators or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2411Filter cartridges
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Other filters with filtering elements stationary during filtration, e.g. pressure or suction filters, or filtering elements therefor
    • B01D29/11Other filters with filtering elements stationary during filtration, e.g. pressure or suction filters, or filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/13Supported filter elements
    • B01D29/15Supported filter elements arranged for inward flow filtration
    • B01D29/21Supported filter elements arranged for inward flow filtration with corrugated, folded or wound sheets
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters, i.e. particle separators or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/52Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
    • B01D46/521Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2201/00Details relating to filtering apparatus
    • B01D2201/29Filter cartridge constructions
    • B01D2201/291End caps
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2201/00Details relating to filtering apparatus
    • B01D2201/34Seals or gaskets for filtering elements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2265/00Casings, housings or mounting for filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2265/02Non-permanent measures for connecting different parts of the filter
    • B01D2265/029Special screwing connections, threaded sections
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2271/00Sealings for filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2271/02Gaskets, sealings
    • B01D2271/027Radial sealings

Abstract

A filter element comprising a filter medium (1) and at least one connecting element (2) connected to the filter medium (1), the connecting element (2) having sealing means (3, 4), has been designed with regard to the problem of providing filter systems which ensure optimal filter performance with simple manufacture, characterized in that the sealing means (3, 4) of a connecting element (2) extend at least in two different directions to the sealing unit at a bearing, or in that the sealing means (3, 4) and the connecting element (2) are designed integrally.

Description

26.01.2006 Wesch / DE

Applicant: Carl Freudenberg KG, 69469 Weinheim

Filter element with connection element

description

Technical area

The invention relates to a filter element comprising a filter medium and at least one connecting element connected to the filter medium, wherein the connecting element has sealing means.

State of the art

Filter elements of the type mentioned above are already known from the prior art. For example, gaskets are known, which comprise strip-shaped connection elements, which are arranged on the end faces of the filter medium. These strip-shaped connecting elements are provided with glued sealing lips, which protrude from the strip-shaped connection elements and come to housing walls to the plant. In this case, each connecting element is assigned a sealing lip.

However, the known from the prior art filter elements are not suitable to ensure a flow-tight contact of the filter element in complex shaped housings. Also, the filter elements have the disadvantage that the adhered sealing lips can detach. Presentation of the invention

The invention is therefore based on the object to provide filter systems which ensure optimum filter performance with simple production.

According to the invention the above object is achieved with the features of claims 1 and 2.

Thereafter, a filter element of the type mentioned in accordance with

Claim 1, characterized in that the sealing means of a connecting element extend at least in two different directions for sealing engagement with an abutment.

According to the invention, it has been recognized that filter elements of this embodiment can be brought into contact with a plurality of housing walls at the same time due to the provision of a plurality of sealing means on a connecting element. In that regard, not only an improved sealing effect and thereby effective filter performance can be achieved, but also a firmer system of the filter element in a housing. Consequently, it is ensured that a filter element structurally simple construction can develop its optimum filter performance, since secondary flows are avoided by leaking gaps.

Consequently, the object mentioned above is achieved.

According to claim 2, a filter element of the type mentioned is characterized in that the sealing means and the connection element are integrally formed. According to the invention it has been recognized that this configuration avoids subsequent processing steps of the connection element, during which sealant must be sprayed or molded in a complex manner. A detachment of the sealant is thus almost impossible, whereby an optimal filter performance is ensured.

Consequently, the object mentioned above is achieved.

Against this background, it is conceivable that the connection element and the filter medium consist of the same material. This design allows for the manufacture of the filter element, the use of only one material and thereby minimizes storage costs. Consequently, a particularly cost-effective manufacturing process can be realized. In particular, it is conceivable that a diecut, which is made of the material from which the filter medium consists, is placed on the filter medium and is thermally connected thereto. It is also conceivable that the connection element is formed out of the filter medium. This can likewise be done by a thermal treatment, namely by softening and shaping the end regions of the filter medium. In this process, sealing means can be attached to the connection element at the same time. This seam or interfaces are effectively avoided and ensures increased tightness of the filter element.

The filter medium could be configured cylindrically with the formation of an axial passage and a connection element may be arranged on the end faces of the cylinder element. This specific embodiment allows the use of the filter element as a filter cartridge. The cylindrically shaped filter medium in connection with the connection element on at least one end face of the cylinder gives the filter element a particular stability. This stability allows the use of the filter element not only at Gas flows such as air, but also in liquid flow media such as oil. Such a filter cartridge can therefore preferably be used as an oil filter.

At least one sealing means could extend in the direction of the axial passage, namely in the radial direction inwards. This concrete

Embodiment ensures that a filter cartridge can be sealed not only with respect to its outer periphery or with respect to the end faces, but also with respect to its inner circumference. This is particularly advantageous when tubular elements are introduced into the axial passage, must be sealed against the outer periphery. The design thus allows the arrangement of a filter cartridge in a complex shaped housing, which is associated with a tubular element. The filter cartridge is aufstülpbar on the tubular member, which can be sealed against the outer surface of the tubular member and against the inner wall of the housing. Especially when using the filter element as a filter cartridge for filtering oils can be extended by this form of sealing the life of adjacent to the filter housing components. This is achieved by the fact that almost no leaks can occur, can penetrate through the contaminants in the adjacent components.

Against this background, the sealing means could extend in mutually orthogonal directions. This geometric arrangement of the sealant allows easy production and tight positioning of the filter element in common housings with mutually orthogonal walls. For example, it is conceivable that a disk-shaped connecting element has a sealing means on its inner or outer circumference and a sealing means on its surface. In this way, it is possible to seal against cylindrical walls and a cover wall of a cylindrical housing which is orthogonal thereto. The sealing means could be designed as protuberances. It is conceivable that the sealing means are designed as semicircular, oval or triangular protuberances, which are sealingly engageable by a press fit against a housing wall.

At least one connecting element could be made of a castable or injection-moldable material. This specific embodiment facilitates the formation of the sealant on the connection element. As a result, the integral production of the connection element and the sealant is particularly greatly simplified. Against this background, it is conceivable that liquid rubber is used as the injection-moldable material. This material is characterized by a particularly easy processing and high elasticity.

A particularly cost-effective and chemically resistant material is polyurethane. This material can be processed easily and has a high chemical resistance to almost all fluids. In addition, polyurethane is characterized by its viscosity behavior particularly as a material, since it can penetrate into fine gaps and cracks and to this extent can ensure a tight, cohesive connection between the filter medium and connection element. Polyurethane is very low viscous during processing, but hardens relatively quickly after processing.

Advantageously, acrylate rubber (ACM) could be used as a castable or injection moldable material. This material is characterized by a high oil resistance. Furthermore, fluororubbers could be used, which are characterized by a particularly high temperature stability. To a high abrasion resistance too Natural rubbers could be used. These are also inexpensive.

The connection element could be produced by the following method steps:

A zig-zag folded filter medium is introduced into a cavity of a mold formed complementary to the filter medium. Thereafter, an approximately 200 0 C hot material is introduced into the mold, which can flow into the fold edges and is prevented by the wall of the mold from spreading in the radial direction. The 200 0 C hot material is usually a thermoplastic material or a liquid rubber. It is particularly important to ensure that the material is chosen so low viscous that the wrinkles are not moved in position or deformed. As a result, the filter property is adversely affected. Against this background, it is conceivable that the shape has star-shaped protuberances which engage in the fold backs and stabilize them during the injection process. When such a mold is used, it is also possible to use highly viscous or higher-viscous materials, since the risk of deformation of the folds no longer exists.

Against this background, silicone could also be used. This material is characterized by a high temperature resistance and is still sufficiently ductile after the cross-linking process to absorb stresses and deformations nondestructively.

It is also conceivable to use thermoplastic materials. These can be very easily brought into the geometric shape of the connection elements described here with suitable tools. At least one connection element could be provided with a thread. This specific embodiment allows the fixed abutment of a tubular element within the axial passage of a cylinder-shaped filter medium when an internal thread is provided. Against this background, it is conceivable that the internal thread is formed so elastic or conical that the threads also act as a sealant. By this configuration, not only a fixed fixation of a tubular element within the filter medium, but also a sealing system is ensured. Against this background, it is also conceivable to provide an external thread, so that the filter element can be screwed in a fluid-tight manner into a receptacle.

At least one connecting element could be provided with a groove. The provision of a groove allows the subsequent attachment of a sealing material within the groove. It is conceivable that the groove is configured with an undercut into which the sealing material can flow in order to ensure a firm connection with the connection element. Against this background, a groove could also define a cavity to increase the stability of the terminal element. The groove could be designed as a defined vulnerability.

The filter medium could be configured as a nonwoven fabric. The use of a nonwoven fabric allows easy adjustment of the filter medium in terms of its porosity, since nonwovens are commercially available in virtually all porosities.

The nonwoven fabric could consist of thermoplastic fibers. The use of thermoplastic fibers allows a fusion and thus a cohesive connection of the filter medium with a connection element, since both filter medium and connection element can soften. The Connection can be made by a method in which the connection element is arranged in a heated mold and the filter medium is pressed against the connection element with a defined force. Optionally, the filter medium and / or the connecting element can be connected by rotational movements with its joining partner. The rotation contributes to the fact that the joining partners connect with each other and penetrate each other. Against this background, it is conceivable that the thermal methods comprise friction welding methods, ultrasonic welding methods or methods which use microwave radiation.

The filter medium could be assigned a pre-filter. The pre-filter advantageously realizes a pre-separation of certain particles, whereby the life of the actual filter medium can be extended. As a pre-filter may preferably be used a spunbonded nonwoven, which has a basis weight of 30 to 200 g / m 2 . Such a spunbonded fabric has proven to be particularly suitable for use when the filter element flows with liquid media. This spunbonded fabric has sufficient strength and is not prone to rupture. It is also conceivable to use a wet-laid nonwoven fabric as a pre-filter. Such a nonwoven fabric is particularly inexpensive.

The pre-filter could be arranged circumferentially around a cylinder-shaped filter medium and be connected to this point by thermal welding or point-line in order to establish a firm connection. If the filter medium has wrinkles, the pre-filter also acts as a wrinkle stabilizer.

The filter medium could be designed as a star-shaped bellows. The provision of folds in the filter medium increases its effective filter area. The relative spacing of the pleats to each other could be done by a welded ribbon, which has a width between 4 and 8 mm having. It could be provided per filter element 1 to 4 bands. These dimensions or this number have proven to be particularly advantageous in terms of the stability of the filter element in the filtration of liquids. The ribbon could be combined with the pleat tips by thermal welding techniques such as ultrasonic welding or

Laser welding be connected. Against this background, it is conceivable to use the prefilter as a wrinkle stabilizer. In this case, the prefilter could be thermally welded to some or all pleat tips. In such an embodiment of the filter medium, the connecting element could have a star profile. The star profile could stabilize the spacing of the pleats of the filter medium.

There are now various ways to embody the teaching of the present invention in an advantageous manner and to further develop. This is on the one hand to the subordinate claims, on the other hand, the following

Explanation of a preferred embodiment of the invention with reference to the drawing.

In conjunction with the explanation of the preferred embodiment of the invention with reference to the drawings, generally preferred embodiments of the teaching are also explained.

Brief description of the drawing

In the drawing shows the only one

Fig. A star-shaped filter element with connection elements, which are designed as end caps. Embodiment of the invention

The sole FIGURE shows a filter element with a filter medium 1 and a connection element 2 connected to the filter element. The connection element 2 can be connected to the filter medium 1 in a materially bonded manner. The

Connecting element 2 has two different sealing means 3 and 4, which extend in two different directions for sealing contact with each abutment.

The filter medium 1 is cylindrical, forming an axial

Passage 5 designed. In each case, a connection element 2 is arranged on the end faces of the cylinder. The sealing means 4 extends in the direction of the axial passage 5, namely in the direction of the axis of symmetry A, d. H. in the radial direction inwards. The sealing means 3 extends in the radial direction to the outside.

The sealing means 3, 4 are arranged concentrically in the specific case. The sealing means 3, which are designed as circular protuberances, each taper in the direction in which they are to be applied to sealing surfaces.

In this case, the axial passage 5 can be filled by a tubular element which comes into contact with the sealing means 4 and acts as an abutment. The sealing means 4 are formed as a thread, in which an abutment can be screwed tight. Due to the ductility of the threads a sealing contact with the screwed abutment is ensured.

The sealing means 3 can be applied against the inner wall of a cylindrical housing. The sealing means 3, 4 and the connection element 2 are integrally formed. The sealing means 3 are designed as semicircular protuberances. The protuberances 3 are designed as circumferential sealing lip.

The connecting element 2 and the sealing means 3, 4 are made of polyurethane.

The filter medium 1 is configured as a nonwoven fabric and consists of thermoplastic fibers. The filter medium 1 is associated with a pre-filter 6, which comprises a spunbonded nonwoven. The pre-filter 6 is shown interrupted, but envelops the filter medium 1 in full.

The filter medium 1 is designed as a star-shaped bellows.

With regard to further advantageous embodiments and developments of the teaching of the invention reference is made on the one hand to the general part of the description and on the other hand to the claims.

Finally, it should be particularly emphasized that the previously purely arbitrary chosen embodiment is only for the purpose of discussion of the teaching of the invention, but this does not limit to this embodiment.

Claims

claims
A filter element comprising a filter medium (1) and at least one connection element (2) connected to the filter medium (1), wherein the connection element (2) has sealing means (3, 4), characterized in that the sealing means (3, 4 ) of a connection element (2) extend at least in two different directions for sealing engagement with an abutment.
2. Filter element, comprising a filter medium (1) and at least one connected to the filter medium (1) connecting element (2), wherein the connecting element (2) sealing means (3, 4), characterized in that the sealing means (3, 4) and the connecting element (2) are integrally formed.
3. Filter element according to claim 1 or 2, characterized in that the filter medium (1) is cylindrically configured to form an axial passage (5) and at least one connection element (2) is arranged on the end faces of the cylinder.
4. Filter element according to one of claims 1 to 3, characterized in that extending at least one sealing means (4) in the direction of the axial passage (5).
5. Filter element according to one of claims 1 to 4, characterized in that the sealing means (3, 4) extend in mutually orthogonal directions.
6. Filter element according to one of claims 1 to 5, characterized in that the sealing means (3, 4) are designed as protuberances.
7. Filter element according to one of claims 1 to 6, characterized in that at least one connecting element (2) is made of a castable or injection-moldable material.
8. Filter element according to claim 7, characterized in that the materials comprise polyurethane.
9. Filter element according to one of claims 3 to 8, characterized in that at least one connecting element (2) is provided with a thread.
10. Filter element according to one of claims 1 to 9, characterized in that at least one connection element (2) is provided with a groove.
1 1. Filter element according to one of claims 1 to 10, characterized in that the filter medium (1) is designed as a nonwoven fabric.
12. Filter element according to claim 1 1, characterized in that the nonwoven fabric consists of thermoplastic fibers.
13. Filter element according to one of claims 1 to 12, characterized in that the filter medium (1) is associated with a pre-filter (6).
14. Filter element according to one of claims 1 to 13, characterized in that the filter medium (1) is designed as a star-shaped bellows.
PCT/EP2007/000579 2006-01-26 2007-01-24 Filter element with connecting element WO2007085427A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE200610003949 DE102006003949B4 (en) 2006-01-26 2006-01-26 Filter element with connection element
DE102006003949.1 2006-01-26

Publications (1)

Publication Number Publication Date
WO2007085427A1 true WO2007085427A1 (en) 2007-08-02

Family

ID=37963661

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/000579 WO2007085427A1 (en) 2006-01-26 2007-01-24 Filter element with connecting element

Country Status (2)

Country Link
DE (1) DE102006003949B4 (en)
WO (1) WO2007085427A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008015088A1 (en) * 2006-08-03 2008-02-07 Mann+Hummel Gmbh Filter unit having a conical thread
WO2016058657A1 (en) * 2014-10-16 2016-04-21 Daimler Ag Filter device for an internal combustion engine, and filter insert for a filter device of this type
USRE46080E1 (en) 2004-06-17 2016-07-26 Hydac Filtertechnik Gmbh Filtering apparatus and filter element
EP3300788A1 (en) * 2011-02-11 2018-04-04 Briggs & Stratton Corporation Air filter assembly for an engine
WO2018175438A1 (en) * 2017-03-20 2018-09-27 Donaldson Company, Inc. System comprising a connector for coupling to a fluid filter element, fluid filter element, and process for producing same

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009008575B4 (en) 2009-02-12 2013-07-25 Carl Freudenberg Kg Filter cartridge with a filter hose head
DE102012017890A1 (en) 2012-09-11 2014-03-13 Carl Freudenberg Kg Filter cartridge
DE102013014507A1 (en) * 2013-09-02 2015-03-05 Mann+Hummel Gmbh Filter element and filter system with a filter element

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DE19534468A1 (en) * 1995-09-18 1997-03-20 Freudenberg Carl Fa Cartridge filter unit mounted in housing with mounting flange at at least one end
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DE19806929A1 (en) * 1998-02-19 1999-08-26 Knecht Filterwerke Gmbh Seal, e.g. for combustion engine fuel filter
EP1031367A1 (en) * 1999-02-27 2000-08-30 MAHLE Filtersysteme GmbH Liquid filter with replaceable ring shaped filter element
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EP1621241A1 (en) * 2004-07-30 2006-02-01 MAHLE Filtersysteme GmbH Liquid filter with exchangable ring filter element and drain structure

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US5700304A (en) * 1996-02-29 1997-12-23 Donaldson Company, Inc. Filter with protective shield
DE19737954C2 (en) * 1997-08-30 2001-10-31 Argo Gmbh Fuer Fluidtechnik Filter element and method for its production
DE10261314A1 (en) * 2002-12-27 2004-07-08 Mann + Hummel Gmbh Fuel filter for a vehicle comprises a beaker-like housing closed by a lid and containing a filter element separating a crude side from a pure side

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WO1989001818A1 (en) * 1986-07-14 1989-03-09 Donaldson Company, Inc. Cylindrical air filter with lightweight housing and radially directed seal
WO1996012550A1 (en) * 1994-10-20 1996-05-02 Fleetguard Inc. Pressure-actuated radial air filter seal
DE19521898A1 (en) * 1995-06-16 1996-12-19 Mann & Hummel Filter Filter cartridge
DE19534468A1 (en) * 1995-09-18 1997-03-20 Freudenberg Carl Fa Cartridge filter unit mounted in housing with mounting flange at at least one end
DE19538883A1 (en) * 1995-10-19 1997-04-24 Bosch Gmbh Robert Filter for liquids, esp. diesel fuel
DE19806929A1 (en) * 1998-02-19 1999-08-26 Knecht Filterwerke Gmbh Seal, e.g. for combustion engine fuel filter
EP1031367A1 (en) * 1999-02-27 2000-08-30 MAHLE Filtersysteme GmbH Liquid filter with replaceable ring shaped filter element
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE46080E1 (en) 2004-06-17 2016-07-26 Hydac Filtertechnik Gmbh Filtering apparatus and filter element
WO2008015088A1 (en) * 2006-08-03 2008-02-07 Mann+Hummel Gmbh Filter unit having a conical thread
EP2241365A1 (en) * 2006-08-03 2010-10-20 Mann + Hummel Gmbh Filter unit having a conical thread
US8097154B2 (en) 2006-08-03 2012-01-17 Mann+Hummel Gmbh Filter unit having a conical thread
CN101500684B (en) * 2006-08-03 2012-04-11 曼·胡默尔有限公司 Filter unit having a conical thread
EP3300788A1 (en) * 2011-02-11 2018-04-04 Briggs & Stratton Corporation Air filter assembly for an engine
US10087897B2 (en) 2011-02-11 2018-10-02 Briggs & Stratton Corporation Engine including an air filter assembly
WO2016058657A1 (en) * 2014-10-16 2016-04-21 Daimler Ag Filter device for an internal combustion engine, and filter insert for a filter device of this type
WO2018175438A1 (en) * 2017-03-20 2018-09-27 Donaldson Company, Inc. System comprising a connector for coupling to a fluid filter element, fluid filter element, and process for producing same

Also Published As

Publication number Publication date
DE102006003949B4 (en) 2008-04-30
DE102006003949A1 (en) 2007-08-09

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