DE102016009355A1 - filtering device - Google Patents

Abstract

A filter device (1) with a filter element (3) accommodated in a filter pot (2), which comprises a filter medium (5) for filtering a device for a motor vehicle, and an end plate (14) which is attached to the filter medium (5) in a fluid-tight manner and has a circumferential one Collar portion (14) for coupling to a corresponding sealing surface (15) of a cover element (4) of the filter cup (2), wherein between the circumferential collar portion (14) and the sealing surface (15) made of a flat filter medium (5) sealing element (23 ) is arranged for axial sealing.

Description

Technical area

The present invention relates to a filter device with a filter element accommodated in a filter pot, which has a filter medium for filtering a device for a motor vehicle.

In the automotive sector are often gases such as air, or liquid resources, such as fuels, such as gasoline, diesel, lubricants, such as oil or urea solutions to rid of impurities.

State of the art

For this filter elements are mostly used, which are used in a filter pot, a filter housing or a filter holder. The filter elements themselves comprise a mostly flat and folded filter medium, which is provided between end plates or end caps and is flowed through radially.

The filter cup is usually closed by means of a cover element, via which the operating medium to be filtered flows into the filter device and the filtered operating medium flows out again. In order to prevent contamination of the filtered operating fluid with the unfiltered operating means, a sealing ring made of an elastomer or a sealing compound is often provided between the filter element and the cover element.

Disclosure of the invention

Against this background, the present invention has the object to provide an improved filter device.

Accordingly, a filter device with a filter element accommodated in a filter pot and having a filter medium for filtering a device for a motor vehicle is proposed. The filter device comprises a fluid-tightly attached to the filter medium end plate with a circumferential collar portion for coupling to a corresponding sealing surface of a cover member of the filter cup, wherein between the circumferential collar portion and the sealing surface made of a flat filter medium sealing element is arranged for axial sealing.

The filter medium of the sealing element and that of the filter element are made of the same material, for example.

A manufactured from a filter medium sealing element is simple and inexpensive to produce. In addition, no embrittlement occurs at low temperatures compared to a seal made of an elastomer, so that the filter device has a long service life. Furthermore, a sealing element made of a filter medium has a high resistance, since the same material as for the filter element is used for the sealing element. The sealing element of filter medium also has the advantage that it is inherently resistant to oil or fuel compared to rubber or plastic sealing rings.

Furthermore, the arrangement of a sealing element between the collar portion of the end plate and the sealing surface of the cover element within the filter device, a raw and a clean fluid region separated by the sealing element. The filter pot can also be referred to as a filter holder, housing or filter housing.

The filter device is adapted to filter fluids, such as air or other gases, liquids, in particular liquid operating means of a vehicle, in particular of a motor vehicle, such as oil, water, diesel, gasoline, kerosene or urea solution. In particular, the filter element is a spin-on oil filter. The filter device can be used in motor vehicles, watercraft, rail vehicles, agricultural vehicles, construction machines, aircraft or the like. Furthermore, the filter element can also be used in immobile applications, such as in generators.

The bellows may have a circular arc-shaped outer geometry, which is formed by an arcuate, in particular arcuate, envelope of the folded edges. One can speak of an endless bellows.

The filter element comprises in particular a raw side and a clean side, wherein during operation of the filter element, the operating medium to be cleaned flows through the filter medium from the raw side to the clean side. The sealing element separates the raw side from the clean side within the filter bowl and prevents contamination of the filtered fluid, such as engine oil.

In embodiments, the sealing element formed from the filter medium is arranged in the press fit between the collar portion and the sealing surface. Due to the compression between the collar portion and the sealing surface, the sealing element made of the filter medium seals sufficiently in the axial direction. If the compression is slightly lower, the resource to be filtered becomes at least filtered at the transition from a raw to a clean side.

In further embodiments, a spring element is arranged within the filter bowl, which is supported on a pot bottom of the filter cup and which urges the filter medium in the axial direction against the lid member. As a result, the sealing element is pressed between the collar portion and the sealing surface of the cover element, so that the sealing element seals axially. The spring element can be positively connected to the bottom of the pot, frictionally and / or materially connected. The spring element may be made of metal or plastic. The spring element may have a base section for supporting the filter element and webs protruding from the base section for supporting on the bottom of the pot.

In further embodiments, the end plate is at least partially made of metal or a metal end plate. The end plate can also be made of plastic.

In further embodiments, the sealing surface is made of metal. Furthermore, the sealing surface may also be made of plastic.

A seal is also achieved when the sealing surface and the region of the collar portion between which the sealing element is pressed, made of metal.

In further embodiments, the cover element comprises a threaded plate having a threaded connection piece. Preferably, the threaded connection piece is designed as a female threaded connection piece. The filtered equipment exits the filter device via the threaded connection piece. Furthermore, the filter device can be connected via the threaded connection piece to a motor vehicle part. Also conceivable are bayonet couplings.

In further embodiments, the collar portion is offset axially relative to an end face of the filter medium. As a result, an axially offset sealing surface is achieved with respect to an end face. The end face is, for example, the surface on which the filter medium is attached in a fluid-tight manner to the end disk.

In further embodiments, the sealing element in the unpressed state has a thickness between 0.1 mm and 1.5 mm. In the unpressed state, the filter medium preferably has a thickness of 0.2 mm to 1.3 mm and more preferably between 0.2 mm and 1 mm.

In particular, by a flat design of the end plate in the region of the collar portion a stamping of the sealing element is prevented.

In further embodiments, the sealing element is formed from a plurality of layers of the flat filter medium. For example, the sealing element can be formed from two or three layers.

In further embodiments, the sealing element is attached to the end plate. The sealing element may be positively, positively and / or cohesively secured to the end plate. Thus, the sealing element can be glued or welded to the end plate.

The end plate can be made in several parts. For example, a plastic end disk element, which is fluid-tightly connected to the filter medium, received in a metal sheet, which comprises the collar portion.

In further embodiments, the filter medium is a synthetic filter fleece. Furthermore, the filter medium may be a filter fabric or a filter fabric. In particular, the filter medium can be produced in a spunbond or meltblown process. Furthermore, the filter medium can be felted or needled. The filter medium can also comprise natural fibers, such as cellulose or cotton, or synthetic fibers, for example of polyimide, polyester, polyvinyl sulfide or polytetrafluoroethylene. The fibers may be oriented in, skewed and / or transversely to the machine direction during processing. The filter medium can be single-layered or multi-layered.

The filter medium can be pleated. The filter medium may have a zigzag or accordion-folded bellows. Fold portions of the filter medium or of the bellows may have different or variable fold heights in embodiments. As a result, the existing space can be exploited in the filter bowl. Under a fold height, for example, to understand the distance between opposite fold edges of a fold section. The filter medium or the bellows may have a circular arc-shaped outer geometry.

The filter medium may be provided with an end plate, preferably two end plates, between which the filter medium is mounted, which may be positively connected to the filter medium, positively and / or materially connected. The end plates can be fused, glued or welded to the filter medium.

Furthermore, the filter medium can surround a central tube. The center tube can be made of a perforated plate be prepared, which is bent to form a tube, wherein the free ends of the perforated plate are positively, positively and / or cohesively connected to each other. Preferably, the filter element is supported on the (optional) spring element via the end plate or the center tube.

The sealing element may be annular. For this purpose, the sealing element can be punched out of a flat filter medium.

Further possible implementations of the filter device also include not explicitly mentioned combinations of features or embodiments described above or below with regard to the exemplary embodiments. The expert will also add individual aspects as improvements or additions to the respective basic form of the filter device.

Further embodiments of the filter device are the subject of the dependent claims and the embodiments of the filter device described below. Furthermore, the filter device will be explained in more detail by means of embodiments with reference to the accompanying figures.

Brief description of the drawings

It shows:

1 a schematic view of an embodiment of a filter device with a partial section;

2 a schematic enlarged sectional view of a collar portion and cover element of the filter device according to 1 ; and

3 : A schematic view of a second embodiment of a filter device with a partial section.

In the figures, the same reference numerals designate the same or functionally identical elements, unless indicated otherwise.

Embodiment (s) of the invention

The 1 shows a schematic view of an embodiment of a filter device 1 with a partial section. The 2 shows a schematic enlarged sectional view of a collar portion 15 and cover element 4 the filter device 1 ,

The filter device 1 includes a filter pot 2 , one in the filter pot 2 received filter element 3 and a lid member 4 that the filter pot 2 closes at the end. The filter pot 2 can also be referred to as a filter holder, housing or filter housing. The filter device 1 Preferably used in motor vehicles, trucks, construction vehicles, watercraft, rail vehicles, agricultural machinery or vehicles or aircraft application. The filter element 3 is particularly suitable for filtering resources. Preferably, the filter device 1 an oil filter as a spin-on change filter.

The filter element 3 includes a filter medium 5 that is a center tube 6 surrounds. For example, the filter medium 5 as endless bellows around the center tube 6 be arranged. The center tube 6 is preferably lattice-shaped and thus fluid-permeable. The center tube 6 may be made of a perforated plate which is bent into a tube, wherein the free ends are non-positively, positively and / or cohesively connected. Preferably, the free ends are welded together and / or crimped. To increase the corrosion resistance, the center tube 6 be galvanized. Likewise, a central tube made of plastic is conceivable.

The filter medium 5 is preferably folded. The folded filter medium 5 can be wrapped for stabilization with a filament winding. The filter medium 5 is for example a filter fabric, a Filtergelege or a filter fleece. In particular, the filter medium 5 be made in a spunbond or meltblown process. Next, the filter medium 5 felted or needled. The filter medium 5 may comprise natural fibers, such as cellulose or cotton, or synthetic fibers, for example of polyester, polyimide, polyvinyl sulfide or polytetrafluoroethylene. The fibers may be oriented in, skewed and / or transversely to the machine direction during processing.

The filter element 3 is in the orientation of 1 at its first lower end 7 with a first end disc 8th Mistake. The first end disk 8th can with the filter element 3 fused, glued or welded.

Furthermore, the filter element is supported 3 at the first end 7 over the end disc 8th on a spring element 9 from. For this purpose, the end plate 8th a depression 10 on, in the one on the spring element 9 outstanding lead 11 intervenes. The spring element 9 rests on a pot bottom 12 of the filter pot 2 from. The spring element 8th is part of the axial press combination of pot bottom 12 and cover element 4 ,

At a second upper end 13 has the filter medium 5 a second end plate 14 on. The end disc 14 is preferably made of a metal. Furthermore, the end plate 14 also be made of a plastic material. The end disc 14 can form fit, non-positive and / or cohesive with the filter medium 5 be connected. The end disc 14 can with the filter medium 5 fused, glued or welded.

The end disc 14 has a circumferential collar portion 15 on, for coupling to a corresponding sealing surface 16 the lid element 4 serves.

The cover element 4 is designed as a threaded cover and includes a threaded connection piece 17 formed as a female threaded connection piece. Via the threaded connection piece 17 can the filter device 1 be attached to a clean fluid connection piece of a motor vehicle part. The threaded connection piece 17 lies in one of the collar portion 15 formed opening 18 and lies sealingly against the collar portion 15 at. The cover element 4 is preferably made of metal.

The cover element 4 is over a metal ring 19 with the filter pot 2 connected. As in particular in 2 it can be seen is the sheet metal ring 19 at a first end around an edge 20 one in the lid member 4 introduced passage 21 bent. At its second, radially outside end of the sheet metal ring 19 with a free end of the filter pot 2 crimped. Between its two ends, the metal ring 19 a mount 22 on, in which a sealing ring 23 rests. The sealing ring 23 is presently designed as a square seal and serves for axial sealing against a corresponding sealing surface on the motor vehicle, such as on the engine block.

About the passage 21 may be resource in the filter device 1 enter and from a raw side RO of the filter element 3 radially through the filter element 3 through into one of the central tube 6 flow in surrounding cavity. From the cavity, the filtered operating medium flows on a clean side RL of the filter element 3 over the threaded connection piece 17 again from the filter device 1 out.

To avoid mixing of unfiltered equipment with filtered equipment is between the lid member 4 and the second end disc 14 a sealing element 24 arranged. The sealing element 24 is in particular between the circumferential collar portion 15 and the sealing surface 16 the lid element 4 arranged. The sealing element 24 is made of a flat filter medium and is annular. In order to achieve a sufficient axial sealing effect, the sealing element 24 in the press bond between the collar section 15 and the sealing surface 16 arranged. For this purpose, the spring element urges 8th the collar section 15 the second end plate 14 over the center tube 6 against the sealing surface 16 of the cover element 4 so that the sealing element 24 is axially compressed.

The sealing element made of the filter medium 24 is for example a filter fabric, a Filtergelege or a filter fleece. In particular, the filter medium of the sealing element 24 be prepared in a spunbond or meltblown process. Next, the filter medium of the sealing element 24 be matted or needle-punched. The filter medium of the sealing element may comprise natural fibers, such as cellulose or cotton, or synthetic fibers, for example of polyester, polyimide, polyvinyl sulfide or polytetrafluoroethylene. The sealing element 24 can have a thickness between about 0.2 mm and about 1.0 mm in the unpressed state. Preferably, the sealing element 24 in the unpressed state, a thickness of about 0.5 mm. In the material of the sealing element 24 in particular, it is the same material as that of the filter medium 5 ,

In 3 is a schematic view of a filter device 1 shown with a partial section according to another embodiment. The further embodiment differs from the preceding embodiment in that the filter element 3 spaced to the bottom of the pot 12 is arranged to a collection room 25 for a fluid to form, and that the sheet metal ring 19 not around the edge 20 of the passage 21 is bent. To drain the collected fluid is in the bottom of the pot 12 also a drain plug 26 brought in.

To create the collection room 25 the filter element is supported 3 over a spacer element 27 on the spring element 9 off by the spacer element 27 into the end disc 8th introduced recess 10 rests. Alternatively, it is possible to use one or more plastic parts as a composite spacer.

Although the present invention has been described in terms of preferred embodiments, it is not limited thereto but modifiable in a variety of ways. The illustrated geometries can be changed. The sealing element 24 may in particular be made of a nonwoven filter material, that of the material of the filter medium 5 is different.

Claims (10)

Filter device ( 1 ) with one in a filter pot ( 2 ) received filter element ( 3 ), which is a filter medium ( 5 ) for filtering an equipment for a motor vehicle, and one on the filter medium ( 5 ) fluid-tight end plate ( 14 ) With a circumferential collar section ( 15 ) for coupling to a corresponding sealing surface ( 16 ) a cover element ( 4 ) of the filter pot ( 2 ), wherein between the circumferential collar portion ( 15 ) and the sealing surface ( 16 ) from a flat filter medium ( 5 ) manufactured sealing element ( 24 ) is arranged for axial sealing. Filter device according to claim 1, characterized in that the sealing element ( 24 ) in the press bond between the collar portion ( 15 ) and the sealing surface ( 16 ) is arranged. Filter device according to claim 1 or 2, characterized in that inside the filter pot ( 2 ) a spring element ( 9 ), which is located on a pot bottom ( 12 ) of the filter pot ( 2 ) and the filter element ( 3 ) in the axial direction against the cover element ( 4 ) urges. Filter device according to one of the preceding claims, characterized in that the sealing surface ( 16 ) is made of metal. Filter device according to one of the preceding claims, characterized in that the end plate ( 14 ) is at least partially made of metal. Filter device according to one of the preceding claims, characterized in that the cover element ( 4 ) comprises a threaded plate having a threaded connection piece ( 17 ) having. Filter device according to one of the preceding claims, characterized in that the collar portion ( 15 ) opposite an end face of the filter medium ( 5 ) is axially offset. Filter device according to one of the preceding claims, characterized in that the sealing element ( 24 ) in the unpressed state has a thickness between 0.1 mm and 1.5 mm, preferably between 0.2 mm and 1.3 mm, more preferably between 0.2 mm and 1 mm. Filter device according to one of the preceding claims, characterized in that the sealing element ( 24 ) from several layers of the flat filter medium ( 5 ) is formed. Filter device according to one of the preceding claims, characterized in that the sealing element ( 24 ) at the end plate ( 14 ) is attached.

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