DE102019108960A1 - Filter with a two-part filter housing and with a filter insert with a seal carrier and filter insert for the filter - Google Patents

Abstract

The invention relates to a filter (1) with a two-part filter housing (10) and an exchangeable filter insert (2), the filter housing parts (10.1, 10.2) being detachably connected to one another and a circumferential seam (15 ') between the filter housing parts (10.1, 10.2) is sealed by means of at least one seal (41), the filter insert (2) having a circumferential seal carrier (40) which covers the seam (15 ') on the inner circumference of the filter housing parts (10.1, 10.2) on both sides of the seam (15') The filter (1) according to the invention is characterized in that the seal carrier (40) has a common, individual seal (41) on its outer circumference for sealing contact with both filter housing parts (10.1, 10.2) or two separate seals (41 '). , 41 ") with essentially the same outer diameter for sealing contact with one filter housing part (10.1, 10.2). The invention also relates to a filter set (2) to interact with the filter (1).

Description

The invention relates to a filter for a fluid medium, with a filter housing consisting of a first filter housing part and a second, cup-shaped filter housing part, and with a filter insert arranged in the filter housing such that it can be replaced with a filter material body and two end disks that surround it at the front, the filter housing parts being detachably connected to one another and wherein a circumferential seam between the filter housing parts in their interconnected state is sealed in a medium-tight manner by means of at least one seal, the filter insert having a circumferential seal carrier which, in an operating position of the seal carrier, overlaps the seam between the filter housing parts on the inner circumference of the filter housing parts on both sides of the seam fits tightly. The invention also relates to a filter insert for the filter.

In the document DE 10 2009 048 411 A1 describes a filter system and a filter element for filtering fluids, in particular a motor vehicle, with a filter head and with a filter bowl. The edge area of the filter bowl is detachably connected to the filter head via a rotating and / or plugging movement. The filter element, preferably in coaxial form, is housed exchangeably in the filter bowl. A sealing device with at least one sealing area serves to seal the filter head from the filter bowl. The filter element has a connection end plate on an end face that faces the edge region of the filter bowl. At least two sealing areas of the sealing device are arranged circumferentially on the connection end disk in such a way that one of the sealing areas seals the connection end disk against the filter head and one of the sealing areas seals the connection end disk against the filter bowl.

A disadvantage of this prior art is that, if two seals are used, they must have different sizes from one another, or that, if a single seal is used, it must have a relatively complicated cross-sectional shape. In addition, there is a risk that when assembling the filter or when changing the filter insert, at least one of the two seals or the individual seal will be stressed by shear forces acting in particular in the circumferential direction, but also in the axial direction and possibly already damaged in this way or moved out of its target position that the desired seal is no longer guaranteed.

The object is therefore to create a filter of the type mentioned above which avoids the disadvantages of the prior art and in which simpler seals can be used and in which damage to the seal or seals is avoided, especially when assembling the filter and when changing the filter element . A suitable filter insert for the filter should also be specified.

The solution to the first part of the problem relating to the filter is achieved according to the invention with a filter which is characterized in that the seal carrier has a common, individual seal on its outer circumference for sealing contact with both filter housing parts or two separate seals with essentially the same outer diameter for sealing Has system on each one filter housing part.

Advantageously, a single seal or two identical seals are sufficient which, because of their radial sealing function, can have a relatively simple shape and are therefore inexpensive. The simple shape of the seal or seals contributes to their low susceptibility to damage when assembling the filter or when changing the filter element.

The filter insert preferably has the circumferential seal carrier at its end disk adjacent to the seam, where the seal carrier can be arranged in a stable and positionally fixed manner.

For the filter according to the invention it is further preferably provided that the seal carrier itself or the filter insert together with the seal carrier in the filter housing can be adjusted in the axial direction of the filter housing by means of an actuating element by actuation from the outside. In this way, the seal carrier with the seal or seals can still be adjusted in its axial position in the assembled state of the filter in order to bring it into an optimal position for sealing the seam. When the seal carrier is adjusted together with the filter insert, these can also be designed so that the filter insert and the seal carrier have a different adjustment path.

A further development suggests that the seal carrier itself or the filter insert together with the seal carrier in the filter housing by means of the actuating element between a first position, in which the common, individual seal or the separate seals cover the interface between the filter housing parts, and a second position , in which the common, individual seal or the separate seals are out of alignment with the seam and lie completely in the second filter housing part, is adjustable. This becomes the advantageous option created to bring the seal carrier with the seal or the seals during the connection and separation of the filter housing parts with each other or from each other in a filter housing area remote from the seam, where the seal or seals are not exposed to mechanical loads associated with the connection or separation of the filter housing parts otherwise act on them. After the connection between the filter housing parts has been established, the seal carrier with the seal or the seals can then be displaced into the area of the seam between them in order to effect the seal between the housing parts. In addition, a particularly high degree of freedom is achieved with regard to the design of the connection between the filter housing parts, since the process of connecting and separating the housing parts from the seal carrier and the seal or seals is not impaired or restricted in their position remote from the seam.

It is also preferably provided that the seal carrier, as a common, individual seal, carries a sealing ring with an essentially rectangular cross-section in its unloaded state or, as the two separate seals, two sealing rings with an essentially round cross-section in its unloaded state. Such sealing rings have the simplest conceivable shapes and are available on the market at low cost.

In a further embodiment, the seal on the outer circumference of the seal carrier can also be designed as a single preassembled elastomer seal or as two separate preassembled, axially spaced apart elastomer seals or as one or more directly molded or injection-molded thermoplastic elastomer seals. As a result, the seal or seals can also bear against the housing parts, supported by the fluid pressure in the interior of the housing, if the seal carrier is designed to be flexible in the area of the seals.

To ensure an exact axial positioning of the seal or seals in the installed state of the filter insert, it is provided that the seal carrier has a step-shaped, radially outwardly projecting first support surface on its one axial side for a first axial support of the seal or seals and that the first filter housing part on its Inner circumference adjacent to the seam has a step-shaped, radially inwardly projecting second support surface for a second axial support of the seal or seals. This prevents undesired axial migration of the seal or seals. In addition, this enables a certain axial compression of the seal or seals in their installed state in order to increase the contact pressure of the seal or seals acting in the radial direction in the direction of the inner circumference of the first and second filter housing parts.

As a further measure to improve and secure the sealing effect of the seal or seals, it is provided that in areas of the inner circumference of the filter housing parts lying on both sides of the seam, on which in the operating position of the seal carrier the seal carrier with the seal or seals overlaps the seam, in each case at least a radially inwardly protruding sealing edge is formed.

A sealing edge protruding radially outward can also be formed on the outer circumference of the region of the seal carrier carrying the seal or seals, preferably adjoining the step-shaped, radially outwardly protruding first support surface in order to ensure a good sealing effect on this side as well. Instead of a single one, more than one sealing edge can also be provided here.

In order to avoid inadvertent loss of the seal or seals during the filter insert of the filter before the filter insert is installed in the filter, an edge-side, on the axial side opposite the first support surface, is expediently provided on the outer circumference of the seal carrier in the area carrying the seal or seals. integrally formed sealing ring retaining edge protruding radially outward.

For a reliable function of the filter, avoiding damage to the seal or seals when assembling the filter and when changing the filter insert is essential and therefore the invention suggests that the first support surface protruding radially outward in the axial direction from the one bearing the seal or seals A ring-shaped protective and centering collar is connected away from the area of the seal carrier and has an outer diameter that is equal to or greater than the outer diameter of the seal or seals in their unloaded state. In principle, however, a smaller diameter is also possible if, for example, protection against a thread is not necessary. In addition, especially in the case of a molded or injection-molded seal, a seal, e.g. T-shaped, geometry of the seal carrier is possible in which no protective and centering collar is provided and the seal or seals are provided on the outermost circumference of the seal carrier.

To solve the second part of the problem relating to the filter insert, the invention proposes a filter insert to interact with one Filter according to one of claims 1 to 10, wherein the filter insert has a filter material body and two end disks which surround it at the end and can be arranged interchangeably in a filter housing of the filter, the filter insert having a circumferential seal carrier which, in an operating position of the seal carrier, has a seam between a first filter housing part and a second, cup-shaped filter housing part detachably connected to it, covering the inner circumference of the filter housing parts on both sides of the seam, can be applied in a radially sealing manner, which is characterized in that the seal carrier has a common, single seal on its outer circumference for sealing contact with both filter housing parts or two separate ones Has seals with essentially the same outer diameter for sealing contact on each filter housing part.

Because the filter insert only requires a single, simple seal or two separate, simple seals, the latter of which can be identical to one another, the filter insert, as a wear part of the filter that needs to be replaced regularly, remains advantageously inexpensive and not susceptible to damage with regard to its seal or seals.

Furthermore, the filter insert preferably has the seal carrier at its end plate, which is adjacent to the interface between the first filter housing part and the second filter housing part in the installed state.

The filter insert advantageously also has second engagement elements which can be brought into engagement in the filter housing with first engagement elements on an actuating element of the filter, the filter insert being adjustable together with the seal carrier in the axial direction of the filter housing by means of the actuating element by actuation from the outside.

With regard to the seal or seals used on the filter insert, it is preferably provided that the common, individual seal is a sealing ring with an essentially rectangular cross section in its unloaded state or that the two separate seals are two sealing rings with an essentially round cross section in their unloaded state .

To secure the position of the seal or seals on the seal carrier, it is proposed that the seal carrier have a step-shaped, radially outwardly projecting first support surface on one axial side for a first axial support of the seal or one of the seals.

It is preferably further provided that at least one sealing edge protruding radially outward is integrally formed on the outer circumference of the region of the seal carrier carrying the seal or seals.

In this case, the sealing edge protruding radially outward is preferably arranged adjacent to the first support surface protruding radially outward in steps.

Expediently, an edge-side, radially outwardly projecting sealing ring retaining edge is also formed on the outer circumference of the seal carrier in its area carrying the seal or the seals on its axial side opposite the first support surface.

Finally, it is provided for the filter insert according to the invention that an annular protective and centering collar adjoins the radially outwardly projecting first support surface in the axial direction away from the area of the seal carrier carrying the seal or seals, which has an outer diameter that is the same as or is larger than the outer diameter of the seal or seals in their unloaded state.

With regard to the advantages achieved with the filter insert according to the invention, reference is made to the preceding description of the corresponding features of the filter.

• 1 einen ersten Filter mit einem zweiteiligen Filtergehäuse und einem Filtereinsatz, in einem betriebsbereiten Zustand, im Längsschnitt,
• 2 einen Ausschnitt des ersten Filters mit einem Teil des zweiten Filtergehäuseteils und des Filtereinsatzes während einer ersten Zusammenbauphase, im Längsschnitt,
• 3 den Ausschnitt des Filters aus 2 während einer zweiten Zusammenbauphase, im Längsschnitt,
• 4 den Ausschnitt des Filters aus 2 und 3, nun zusätzlich mit einem Teil des ersten Filtergehäuseteils, während einer dritten Zusammenbauphase, im Längsschnitt,
• 5 den Ausschnitt des Filters aus 4 während einer vierten Zusammenbauphase, im Längsschnitt,
• 6 den Ausschnitt des Filters aus 4 und 5 in fertig zusammengebautem Zustand des Filters, im Längsschnitt,
• 7 einen Ausschnitt eines zweiten Filters mit einem Teil des zweiten Filtergehäuseteils und des Filtereinsatzes während einer ersten Zusammenbauphase, im Längsschnitt, und
• 8 einen Dichtungsträger des Filtereinsatzes, in einer geänderten Ausführung, teils im Querschnitt, teils in Ansicht schräg von oben.

In the following, exemplary embodiments of the invention are explained using a drawing. The figures in the drawing show:

• 1 a first filter with a two-part filter housing and a filter insert, in an operational state, in longitudinal section,
• 2 a section of the first filter with part of the second filter housing part and of the filter insert during an initial assembly phase, in longitudinal section,
• 3 the section of the filter 2 during a second assembly phase, in longitudinal section,
• 4th the section of the filter 2 and 3 , now additionally with part of the first filter housing part, during a third assembly phase, in longitudinal section,
• 5 the section of the filter 4th during a fourth assembly phase, in longitudinal section,
• 6th the section of the filter 4th and 5 in the fully assembled state of the filter, in longitudinal section,
• 7th a section of a second filter with part of the second filter housing part and the filter insert during a first assembly phase, in longitudinal section, and
• 8th a seal carrier of the filter insert, in a modified version, partly in cross-section, partly in view obliquely from above.

In the following description of the figures, the same parts in the various drawing figures are always provided with the same reference symbols, so that not all reference symbols have to be explained again for each drawing figure.

1 shows a first filter 1 with a two-part filter housing 10 and a filter insert 2 therein, in an operational state, in longitudinal section.

The filter housing 10 is composed here of a first, upper filter housing part 10.1 and a second, cup-shaped lower filter housing part 10.2 . The first part of the filter housing 10.1 owns his in 1 upward facing face a connection flange 16 with a circumferential seal 16 ' and with a central clean medium outlet with an internal thread 12 ' , by means of which the filter 1 to a corresponding counter-connecting flange, for example an internal combustion engine, e.g. B. in a function as an oil filter, screwed. Radially outside of the clean medium outlet 12 ' and radially inward of the seal 16 ' are distributed in the circumferential direction several openings are arranged, which together form a raw medium inlet 12 form.

The connection flange 16 is designed here so that the filter 1 can be used instead of a conventional screw-on filter cartridge, which can only be replaced as a whole, after which, ecologically and economically advantageous, only the filter insert is changed 2 is possible.

The second, cup-shaped filter housing part 10.2 is at its upper, open edge with the first filter housing part 10.1 releasably connected. In the illustrated embodiment, the two filter housing parts are connected and disconnected 10.1 , 10.2 by moving the second filter housing part 10.2 relative to the first filter housing part 10.1 in a direction transverse to the longitudinal direction of the filter 1 . In the in 1 The condition shown is the filter 1 assembled and ready for use and a seam 15 ' between the two filter housing parts 10.1 , 10.2 is radially sealing on the inner circumference of the two filter housing parts 10.1 , 10.2 adjacent, the seam 15 ' Bridging and overlapping sealing ring with a rectangular cross-section and sufficiently high in the axial direction 41 , the part of the in the filter housing 10 exchangeably arranged filter insert 2 is sealed. This also ensures that the sealing ring is replaced every time the filter element is changed 41 is automatically changed with.

The filter insert 2 consists here of a hollow cylindrical filter material body 20th , the face of a lower end plate 21st and an upper end plate 22nd is sealed. Inside the filter material body 20th is a grid-shaped support body 27 arranged, which in operation of the filter 1 the filter material body 20th when it flows through it in the radial direction from the outside to the inside, is supported against collapsing.

The second filter housing part has in its lower area 10.2 a plurality of axially extending, rib-shaped first guide elements distributed on its inner circumference in the circumferential direction 14th facing radially outward from the lower end plate 21st protruding second guide elements 24 of the filter insert 2 work together in the sense that the filter element 2 in his in the second filter housing part 10.2 inserted state is axially displaceable, but is guided in the circumferential direction non-rotatable or defined limited rotatable.

The lowest part of the second filter housing part 10.2 forms a floor 10.3 that has a central lead-through hole 13 is executed. In this through hole 13 is an actuator 3 by means of an axially central bearing part 33 with a bearing sealing ring in between 34 around a central longitudinal direction of the filter 1 running axis of rotation 30th rotatably sealed. An axially outer actuator part 31 of the actuating element 3 forms one of the outer contour of the floor 10.3 of the second filter housing part 10.2 following handle with which the actuating element 3 manually around its axis of rotation 30th can be twisted.

The actuator 3 is here purely by way of example and can alternatively be designed in any way that allows height adjustment of the filter insert 2 allowed, for example as a wedge or lever mechanism or in the form of a ballpoint pen adjustment.

On one inside the second filter housing part 10.2 lying axially inner actuator part 32 are the first engagement elements 36 , here in the form of a plurality of circumferentially distributed, radially inwardly pointing guide pins, arranged.

From the underside of the lower end plate 21st extends a hollow cylindrical extension 25th in the axial direction downwards. On the outer circumference of the extension 25th are second engagement elements 26th , here in the form of helical grooves, which are formed with the first Engaging elements 36 of the actuating element 3 can be brought into and out of engagement and cooperate in the engaged state. The interaction here is such that when the actuating element is rotated 3 around the axis of rotation 30th the filter insert 2 is shifted in the axial direction. In the in 1 Operational condition of the filter shown 1 the filter insert is located 2 in its upper end position, in which, as described above, the sealing ring 41 on the filter insert 2 the seam 15 ' between the two filter housing parts 10.1 , 10.2 and at the same time the filter insert 2 a separation of the two filter housing parts 10.1 , 10.2 locks from each other.

The seal 41 , here in the form of the sealing ring with a rectangular cross section, is on the outer circumference of a ring-shaped circumferential seal carrier 40 arranged which part of the upper end disk 22nd of the filter insert 2 is. Here is the seal carrier 40 by means of several in the circumferential direction of the end disk 22nd on the radially outer edge thereof arranged in a distributed manner, axially upwardly and radially outwardly pointing connecting arms 47 with the rest of the end plate 22nd connected.

Between the connecting arms 47 passages remain free that allow the fluid medium to be filtered to flow in through the raw medium inlet 12 flows between the inner circumference of the seal carrier 40 and the radially outer edge of the end plate 22nd of the filter insert 2 through to the outer periphery of the filter material body 20th allow. After flowing through the filter material body 20th in the radial direction from outside to inside, the now filtered fluid medium flows upwards through a central opening 22 ' the upper end disk 22nd , in terms of flow from the raw medium inlet 12 separated, to the central clean medium outlet 12 ' .

An axially lower one, moving towards below the seal 41 extending part of the seal carrier 40 forms a protective and centering collar 46 whose outside diameter is equal to or larger than the outside diameter of the seal 41 is in their unloaded state. This protective and centering collar 46 protects the seal 41 against damage when inserting the filter insert 2 in the second filter housing part 10.2 and centers the filter element 2 in the second filter housing part 10.2 .

In the in 1 The operational state shown is the seal 41 between the upper, first filter housing part 10.1 and the seal carrier 40 on the filter insert 2 pressed in the axial direction to a certain extent, which means a radial expansion and thus a reliable radial sealing contact of the seal 41 on the inner circumference of the two filter housing parts 10.1 , 10.2 on both sides of the seam 15 ' cares. This axial compression of the seal takes place 41 advantageous only when the two filter housing parts 10.1 , 10.2 are already connected.

The contact surfaces for the seal 41 on the inner circumference of the two filter housing parts 10.1 , 10.2 are designed with the same or at least substantially the same inside diameter so that the seal is rectangular in cross section 41 the seam 15 ' Can cover and seal reliably with as little deformation as possible and with the lowest possible mechanical loads. Still the poetry 41 capable of certain dimensional and shape tolerances of the inner circumference of the two filter housing parts in the immediate vicinity of the seam 15 ' balance.

To separate the two filter housing parts 10.1 , 10.2 from each other for the purpose of changing the filter element 2 to enable is by means of the actuating element 3 by twisting the filter insert 2 together with the seal carrier 40 and the seal 41 in the axial direction downwards into the second filter housing part 10.2 moved in until the seal carrier 40 and the seal 41 except for coverage with the seam 15 ' and are completely in the second filter housing part 10.2 lying. In this position of the filter insert 2 is the separation of the filter housing parts 10.1 , 10.2 released from each other by moving transversely to the filter longitudinal direction.

After separating the filter housing parts 10.1 , 10.2 from each other can in the second filter housing part 10.2 remaining fluid medium can be poured into a collecting container. Then the filter insert 2 after releasing the engagement between the engagement elements 26th , 36 on the filter insert 2 and on the actuator 3 by turning the actuating element accordingly 3 from the second filter housing part 10.2 removed or simply by turning the second filter housing part upside down 10.2 be dropped out of this.

2 shows a section of the filter with part of the second filter housing part 10.2 and the filter insert 2 during a first assembly phase, in longitudinal section. The filter insert 2 is here only over part of its axial length in the second, from the first filter housing part 10.1 separate filter housing part 10.2 introduced, the one part of the filter element 2 forming seal carriers 40 here still axially outside the second filter housing part 10.2 lies.

Next also shows the 2 the axially below the seal 41 and the poetry 41 load-bearing area 42 of the seal carrier 40 lying protective and centering collar 46 , the one here with the outer diameter of the still unloaded poetry 41 Has matching outer diameter.

With the upper end disk 22nd of the filter insert 2 is the seal carrier 40 by means of the connecting arms 47 connected.

After all, in 2 at the upper edge of the inner circumference of the second filter housing part 10.2 a circumferential, radially inwardly protruding sealing edge 18.2 visible in the fully assembled state of the filter with the seal 41 interacts, in particular the 6th which is explained below.

3 shows the section of the filter 2 during a second assembly phase, again in longitudinal section. The filter insert 2 with the seal carrier 40 and the seal 41 is now so far into the second filter housing part 10.2 introduced that no part of the filter element 2 over the upper edge of the second filter housing part 10.2 protrudes.

With this further insertion of the filter insert 2 in the second filter housing part 10.2 the protective and centering collar protects 46 the seal 41 against mechanical damage due to friction on the inner circumference of the second filter housing part 10.2 and at the same time centers the upper area of the filter insert 2 in the second filter housing part 10.2 .

In addition, a sealing ring retaining edge takes care of this process 45 at the top of the outer circumference of the seal 41 load-bearing area 42 of the seal carrier 40 making sure the seal 41 not inadvertently from the seal carrier 40 slips off.

4th shows the section of the filter 2 and 3 , now additionally with part of the first filter housing part 10.1 , during a third assembly phase, also in longitudinal section. The first filter housing part is in this phase 10.1 and the second filter housing part 10.2 by moving transversely to each other along their associated sliding guides 11.1 , 11.2 now connected to each other, but not yet sealed against each other, since the seal 41 on the seal carrier 40 still at an axial distance below the seam 15 ' is located.

5 shows the section of the filter 4th during a fourth assembly phase, again in longitudinal section. The filter insert is in this phase 2 together with the seal carrier 40 and the seal 41 in the axial direction by a certain distance upwards, that is to say in the direction of the first filter housing part 10.1 , moved, this shifting by operating the operating element 3 (please refer 1 ) he follows.

The seal 41 already protrudes slightly over the seam 15 ' out, but is not yet in engagement with a sealing edge 18.1 on the inner circumference of the first filter housing part 10.1 immediately axially above the seam 15 ' is arranged.

Next is in 5 to see that the seal 41 still at a certain axial distance above a first, lower axial support surface 43 on the seal carrier 40 and also at a certain axial distance below a second, upper axial support surface 17th on the first part of the filter housing 10.1 is located.

6th shows the section of the filter 4th and 5 in the fully assembled state of the filter, again in longitudinal section. The filter insert 2 with the seal carrier 40 and the seal 41 is now in its uppermost position relative to the filter housing parts 10.1 , 10.2 and the seal 41 now lies symmetrically partly above and partly below the seam 15 ' between the two filter housing parts 10.1 , 10.2 and thus seals the seam 15 ' against an escape of fluid medium from the interior of the filter to the outside.

The seal with a rectangular cross section 41 now lies with its underside on the first, lower axial support surface 43 and with its upper side on the second, upper axial support surface 17th on. This experiences the seal 41 a certain axial compression, which is necessary for a good pressure of the seal 41 in the radial direction outwards to the inner circumference of the first and second filter housing part 10.1 , 10.2 on both sides of the seam 15 ' cares.

In addition, when the filter is in operation, the pressurized fluid medium therein also ensures the pressure of the seal 41 on the inner circumference of the two filter housing parts 10.1 , 10.2 increasing exposure.

In addition, the good sealing effect is ensured by the fact that the seal 41 with its outer circumference on the first circumferential sealing edge 18.1 on the first part of the filter housing 10.1 and on the second circumferential sealing edge 18.2 on the second filter housing part 10.2 is applied. In addition, the seal lies 41 with its inner circumference on a further sealing edge 44 on the outer circumference of the seal 41 load-bearing area 42 of the seal carrier 40 immediately above the first axial support surface 43 on.

7th shows a section of a second filter with part of the second filter housing part 10.2 and the filter insert 2 during a first assembly phase, in longitudinal section.

Different from the previous one based on the 2 to 6th described embodiment is in the embodiment according to 7th that instead of a single seal now two separate seals 41 ' , 41 " on the outer circumference of the seal carrier 40 are provided. The seals 41 ' , 41 " are arranged at an axial distance from one another, are identical to one another and each have a circular cross-section, so they can be common O-rings.

The seals 41 ' , 41 " lie in flat recesses on the outer circumference of the seals that are adapted to their outline 41 ' , 41 " load-bearing area 42 of the seal carrier 40 so that the seals 41 ' , 41 " secured in place and against accidental removal from the seal carrier 40 are prevented.

With regard to its further individual parts and its functions and its interaction with the rest of the filter, the exemplary embodiment corresponds to FIG 7th the embodiment according to 2 to 6th , to the description of which reference is therefore made in this regard.

8th finally shows a section of the seal carrier 40 in a modified version, partly in cross-section and partly in an oblique view from above. The ring-shaped circumferential seal carrier 40 is approximately T-shaped in cross section in this embodiment. It has a radially inner seal carrier area 47 ' forming T-stem radially inward and forms a circumferential guide edge radially inward 42 ' , by means of which the seal carrier 40 on the filter insert, which is otherwise not shown here 2 is held and guided displaceably in the axial direction. A T-bar forming a radially outer seal carrier area is located radially on the outside, is aligned to run in the axial direction and forms two radially resilient sealing tabs 40 ' .

On the outer circumference and the upper edge of the upper sealing tab 40 ' and the lower edge of the lower sealing tab 40 ' encompassing is here as poetry 41 arranged a uniform, continuous sealing profile. The seal 41 can only because of their shape with the axially outer edge of the sealing tabs 40 ' encompassing, bent edge areas without further tools on the seal carrier 40 be held. Alternatively, the seal 41 also to the seal carrier 40 be glued or welded or molded or in some other suitable manner with the seal carrier 40 , if necessary also detachable, be connected. Due to the symmetrical design of the seal carrier 40 easy assembly is guaranteed.

Alternatively, instead of the uniform, continuous sealing profile, two sealing profiles which are axially spaced from one another can also be provided, one of these sealing profiles each having a sealing tab 40 ' assigned.

List of reference symbols

1

filter

10

Filter housing

10.1

first filter housing part

10.2

second, cup-shaped filter housing part

10.3

Bottom of 10.2

11.1

first sliding guide on 10.1

11.2

second sliding guide on 10.2

12

Raw medium inlet

12 '

Clean medium outlet

13

Feed-through hole in 10.3 For 3

14th

first guide elements on the inside 10.2

15 '

Seam between 10.1 and 10.2

16

Connection flange 10.1

16 '

Seal on 16

17th

second axial support surface

18.1, 18.2

Sealing edges 10.1 , 10.2

2

Filter insert

20th

Filter material body

21st

first, lower end plate

22nd

second, upper end plate

22 '

central opening in 22nd

24

second guide elements 21st

25th

Continuation 21st

26th

second engagement elements 25th

27

Support body in 20th

3

Actuator

30th

Axis of rotation from 3

31

axially outer actuator part of 3

32

axially inner actuator part of 3

33

axially central bearing part of 3

34

Bearing seal on 13 , 33

36

first engagement elements 3

40

Seal carrier

40 '

Sealing tabs

41

single seal on 40

41 ', 41 "

two seals on 40

42

Seal (s) bearing area of 40

42 '

Leading edge

43

first axial support surface

44

Sealing edge 42

45

Seal retaining edge

46

Protective and centering collar

47

Connecting arms between 22nd and 40

47 '

radially inner seal carrier area

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 102009048411 A1 [0002]

Claims (19)

Filter (1) for a fluid medium, with a filter housing (10), consisting of a first filter housing part (10.1) and a second, cup-shaped filter housing part (10.2), and with a filter insert (2) with a replaceable filter housing (10) Filter material body (20) and two end disks (21, 22) enclosing these at the front, the filter housing parts (10.1, 10.2) being detachably connected to one another and a circumferential seam (15 ') between the filter housing parts (10.1, 10.2) in their interconnected state is sealed medium-tight by means of at least one seal (41), and with a circumferential seal carrier (40) which, in an operating position of the seal carrier (40), covers the seam (15 ') between the filter housing parts (10.1, 10.2) on the inner circumference of the filter housing parts (10.1 , 10.2) rests radially sealingly on both sides of the seam (15 '), characterized in that the seal carrier (40) has a e has a common, single seal (41) for sealing contact with both filter housing parts (10.1, 10.2) or two separate seals (41 ', 41 ") with essentially the same outer diameter for sealing contact with one filter housing part (10.1, 10.2). Filter (1) Claim 1 , characterized in that the filter insert (2) has the circumferential seal carrier (40) at its end plate (22) adjacent to the seam (15 '). Filter (1) Claim 1 or 2 , characterized in that the seal carrier (40) by itself or the filter insert (2) together with the seal carrier (40) in the filter housing (10) can be adjusted by means of an actuating element (3) by actuation from the outside in the axial direction of the filter housing (10). Filter (1) Claim 3 , characterized in that the seal carrier (40) by itself or the filter insert (2) together with the seal carrier (40) in the filter housing (10) by means of the actuating element (3) between a first position in which the common, individual seal (41 ) or the separate seals (41 ', 41 ") cover the seam (15') between the filter housing parts (10.1, 10.2), and a second position in which the common, individual seal (41) or the separate seals (41 ') , 41 ") are out of alignment with the seam (15 ') and lie completely in the second filter housing part (10.2), is adjustable. Filter (1) for one of the Claims 1 to 4th , characterized in that the seal carrier (40) as a common, single seal (41) has a sealing ring with an essentially rectangular cross-section in its unloaded state or, as the two separate seals (41 ', 41 "), two sealing rings with one unloaded State of essentially round cross-section. Filter (1) Claim 5 , characterized in that the seal carrier (40) has on its one axial side a step-shaped, radially outwardly projecting first support surface (43) for a first axial support of the seal (41) or seals (41 ', 41 ") and that the first The filter housing part (10.1) has a step-shaped, radially inwardly projecting second support surface (17) for a second axial support of the seal (41) or seals (41 ', 41 ") on its inner circumference adjacent to the seam (15'). Filter (1) for one of the Claims 1 to 6th , characterized in that on both sides of the seam (15 ') lying areas of the inner circumference of the filter housing parts (10.1, 10.2), on which in the operating position of the seal carrier (40) the seal carrier (40) overlaps the seam (15'), in each case at least one sealing edge (18.1, 18.2) projecting radially inward is integrally formed. Filter (1) Claim 6 , characterized in that on the outer circumference of the area (42) of the seal carrier (40) carrying the seal (41) or seals (41 ', 41 ") a radially outwardly projecting sealing edge (44), preferably on the step-shaped radially outwardly projecting first support surface (43) is subsequently formed on. Filter (1) Claim 6 , characterized in that on the outer circumference of the seal carrier (40) in its region (42) carrying the seal (41) or seals (41 ', 41 ") on its axial side opposite the first support surface (43), an edge-side, radially after outwardly protruding sealing ring retaining edge (45) is formed. Filter (1) Claim 6 , characterized in that on the radially outwardly projecting first support surface (43) in the axial direction away from the area (42) of the seal carrier (40) carrying the seal (41) or seals (41 ', 41 "), an annular protective and a centering collar (46) is connected which has an outer diameter which is equal to or greater than the outer diameter of the seal (41) or seals (41 ', 41 ") in their unloaded state. Filter insert (2) to interact with a filter (1) according to one of the Claims 1 to 10 , wherein the filter insert (2) has a filter material body (20) and two end disks (21, 22) which surround it at the end and are interchangeable in one Filter housing (10) of the filter (1) can be arranged, the filter insert (2) having a circumferential seal carrier (40) which, in an operating position of the seal carrier (40), has a seam (15 ') between a first filter housing part (10.1) and a second, cup-shaped filter housing part (10.2), which is detachably connected to it, can be placed on the inner circumference of the filter housing parts (10.1, 10.2) on both sides of the seam (15 ') in a radially sealing manner, characterized in that the seal carrier (40) has a common, individual seal on its outer circumference (41) for sealing contact with both filter housing parts (10.1, 10.2) or two separate seals (41 ', 41 ") with essentially the same outer diameter for sealing contact with one filter housing part (10.1, 10.2). Filter insert (2) Claim 11 , characterized in that it has the seal carrier (40) at its end plate (22) adjacent to the joint (15 ') between the first filter housing part (10.1) and the second filter housing part (10.2) in the installed state. Filter insert (2) Claim 11 or 12 , characterized in that it has second engagement elements (26) which can be brought into engagement with first engagement elements (36) on an actuating element (3) in the filter housing (10), the filter insert (3) being actuated from the outside by means of the actuating element (3). 2) is adjustable together with the seal carrier (40) in the axial direction of the filter housing (10). Filter insert (2) after one of the Claims 11 to 13 , characterized in that the common, individual seal (41) is a sealing ring with an essentially rectangular cross-section in its unloaded state or that the two separate seals (41 ', 41 ") essentially round two sealing rings with one in their unloaded state Cross-section are. Filter insert (2) after one of the Claims 11 to 14th , characterized in that the seal carrier (40) has on its one axial side a step-shaped, radially outwardly projecting first support surface (43) for a first axial support of the seal (41) or one of the seals (41 ', 41 "). Filter insert (2) after one of the Claims 11 to 15th , characterized in that at least one sealing edge (44) protruding radially outward is formed on the outer circumference of the region (42) of the seal carrier (40) carrying the seal (41) or the seals (41 ', 41 "). Filter insert (2) Claim 15 and 16 , characterized in that the radially outwardly protruding sealing edge (44) is arranged adjacent to the step-shaped, radially outwardly protruding first support surface (43). Filter insert (2) Claim 15 , characterized in that on the outer circumference of the seal carrier (40) in the region (42) carrying the seal (41) or the seals (41 ', 41 ") on its axial side opposite the first support surface (43), an edge-side, radial outwardly protruding sealing ring retaining edge (45) is formed. Filter insert (2) Claim 15 , characterized in that on the radially outwardly projecting first support surface (43) in the axial direction away from the area (42) of the seal carrier (40) carrying the seal (41) or the seals (41 ', 41 ") - and the centering collar (46) adjoins, which has an outer diameter which is equal to or greater than the outer diameter of the seal (41) or seals (41 ', 41 ") in their unloaded state.

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