WO2020201188A1

WO2020201188A1 - Tubular body assembly with an annular seal element, annular seal element, and method for assembling such a tubular body assembly

Info

Publication number: WO2020201188A1
Application number: PCT/EP2020/058903
Authority: WO
Inventors: Samuel Kohler
Original assignee: Mahle International Gmbh
Priority date: 2019-04-01
Filing date: 2020-03-30
Publication date: 2020-10-08
Also published as: DE112020001722A5; DE102019204593A1

Abstract

The invention relates to a tubular body assembly (8) with a first and a second tubular body (9a, 9b) which delimit a fluid channel (10) when releasably plugged into each other in an assembled state (7). The two tubular bodies (9a, 9b) plugged into each other are connected together by means of an annular seal element (1) such that the seal element (1) seals the fluid channel (10) with respect to the outer surroundings (11) of the two tubular bodies (9). The seal element (1) has a seal foot (2) which extends along a foot direction (F) in profile, in particular in a state without substantial external loading, and from which a primary seal lip (3) protrudes transversely to the foot direction (F). A first and a second secondary seal lip (4a, 4b) protrude from the primary seal lip (3) along the foot direction (F) in profile on both sides and opposite each other at a distance from the seal foot (2), in particular in the state without substantial external loading.

Description

Pipe body arrangement with an annular sealing body, annular sealing body and method for assembling such a pipe body arrangement

The invention relates to a tubular body arrangement with an annular

Sealing body, an annular sealing body for such a pipe body arrangement and a method for assembling such a pipe body arrangement.

Conventional annular seal bodies, such as those used for

fluid-tight connection of two tubular bodies of a fluid line are used, have been known for some time. Commonly known are, for example

so-called O-rings, which have a circular profile. A disadvantage of O-rings is that a comparatively high assembly force is required when assembling a pipe body arrangement with an O-ring and the tightness in the case of overpressure and underpressure of a fluid channel bounded by the pipe body arrangement compared to a pipe body arrangement surrounding external environment can only be unsatisfactorily guaranteed. Furthermore, so-called X-rings correspond to the prior art, which have a cruciform cross-section. X-rings are also associated with various disadvantages, such as a relatively high assembly force when producing a tubular body arrangement with an X-ring and comparatively high production costs for the X-ring itself

Lip sealing rings are known which are used in particular for sealing a tubular body arrangement in a predetermined sealing direction, which results from a pressure gradient between a pressure in the fluid channel limited by the raw body arrangement and the ambient pressure in the environment surrounding the tubular body arrangement. ^p i nnAi sfv? R \ / \ / o

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It is therefore an object of the present invention, for tubular body assemblies with an annular sealing body, for annular

Sealing body for such a pipe body arrangement and for methods for assembling such a pipe body arrangement - in particular to eliminate the disadvantages mentioned above - to show new ways.

This object is achieved by the subject matter of the independent patent claims. Advantageous embodiments are the subject of the dependent

Claims.

The basic idea of the invention is accordingly to design an annular sealing body of a tubular body arrangement with a sealing base and with three sealing lips arranged on this. The sealing body is thus deformable in an assembled state of the tubular body arrangement with two tubular bodies and the annular sealing body that two of the sealing lips can be placed against one tubular body, the sealing base being in contact with the other tubular body. In this way, a fluid channel delimited by the tubular body arrangement can be effectively sealed by means of the sealing body from the external environment surrounding the tubular body arrangement, independently of a pressure gradient between the fluid channel and its surroundings. This goes hand in hand with the fact that the sealing body can be mounted independently of the sealing direction.

A tubular body arrangement according to the invention comprises an annular sealing body, in particular a sealing ring, and a first and a second tubular body. The tubular body arrangement can in particular be designed as an air, fuel or oil line arrangement. Such a tubular body arrangement can be used in particular in a motor vehicle. The first and the second tubular body of the tubular body arrangement are in one

Assembled state detachable and telescopically inserted into one another. Together, the first and second tubular bodies delimit in the assembled state ^p i nnAi sfv? R \ / \ / o

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3 each have a fluid channel on the inside. The two nested tubular bodies are connected to one another by means of a sealing body. Using the

Sealing body, the fluid channel delimited by the tubular bodies of the tubular body arrangement is sealed off from an external environment. The sealing body has a sealing base on which a primary sealing lip is arranged protruding. At a distance from the sealing base, two secondary sealing lips are formed on both sides protruding from the primary sealing lip. In a state without significant external stress, which exists, for example, as long as the sealing body is not installed in a tubular body arrangement, the sealing base extends in the profile of the sealing body in a base direction to which the primary sealing lip protrudes transversely from the sealing base. A first and a second secondary sealing lip protrude in the profile of the sealing body opposite one another and arranged at a distance from the sealing base in the state without substantial external load along the base direction from the primary sealing lip on both sides. The profile of the ring-shaped sealing body thus has a partially cross-like or x-like shape, the sealing base being in the form of a thickening at one end of an axis of the cross-like shape of the profile formed by the primary sealing lip. This geometry of the profile of the annular sealing body advantageously enables an improved one, not least in terms of production and cost aspects

Achieve a non-directional seal with both positive and negative pressure. Accordingly, the fluid channel in the tubular body arrangement can be sealed particularly effectively by means of the sealing body, independently of the sealing direction, with respect to the external environment surrounding the tubular body arrangement.

An advantageous further development of the tubular body arrangement provides that the primary sealing lip of the sealing body is designed to taper away from the sealing base in the profile of the sealing body. Likewise, the first and / or the second secondary sealing lip of the sealing body can be designed to taper away from the primary sealing lip. Each or one of the sealing lips of the ^p i nnAi sfv? R \ / \ / o

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Sealing bodies can expediently have a radius at their ends facing away from the sealing body. As a result of this tapered design of the primary or one or both secondary sealing lips, they can be placed particularly well on a sealing surface of one of the tubular bodies in order to achieve a particularly good seal.

According to a preferred embodiment of the tubular body arrangement, the sealing foot has a first and a second foot section, the first foot section merging into the second foot section along the foot direction.

In addition, the sealing body comprises a compensation groove, the groove bottom of which is delimited by the primary sealing lip and the groove flanks of which are delimited by the first

The foot section of the sealing foot and the first secondary sealing lip is limited. Such a compensating groove can be formed in an analogous manner on both sides of the primary sealing lip, the groove bottom then being delimited by one side of the primary sealing lip and the groove flanks being delimited by one of the secondary sealing lips and one of the foot sections. The

Compensation groove or the compensation grooves allow an advantageous

Deformation of the sealing body in an assembled state in which the sealing body is installed in a tubular body arrangement to compensate for or to allow improved. In this way, a particularly effective sealing of a fluid channel delimited by the tubular body arrangement with respect to the surroundings surrounding the tubular body arrangement can be achieved. An assembly force to be applied by a worker for assembling the sealing body in the tubular body arrangement is advantageously reduced.

In a further preferred embodiment of the tubular body arrangement, the compensation groove in the profile of the sealing body is in the foot direction

Primary sealing lip designed to taper. As a result, the deformation of the sealing body in the assembled state can be compensated for particularly well. ^p i nnAi sfv? R \ / \ / o

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In a further preferred embodiment of the tubular body arrangement, the groove flanks of the compensation groove are arranged in the profile of the sealing body at an acute angle to one another. It is thus advantageously achieved that when the sealing body is deformed in the assembled state of the tubular body arrangement with the sealing body, one of the secondary sealing lips can be better supported on the sealing base.

The primary sealing lip and at least one of the

Secondary sealing lips, preferably both of the secondary sealing lips, and the sealing base are integrally formed on the sealing body. Such a

Sealing body can be manufactured particularly inexpensively in terms of cost, for example by means of a casting process in one cast. Alternatively, it is also possible that some of the sealing lips or the sealing foot on the

Sealing body are placed, whereby, for example, the sealing lips can be made of a material different from the sealing base.

A special embodiment of the tubular body arrangement provides that the secondary sealing lips, when viewed in profile, protrude perpendicularly from the primary sealing lip in the state without significant external load. Such an arrangement of the secondary sealing lips enables a particularly effective sealing of a fluid channel delimited by the tubular body arrangement with the sealing body with respect to the environment surrounding the tubular body arrangement on the outside.

The sealing body expediently comprises a resilient material or consists of such a resilient material. This advantageously means that in the assembled state of a tubular body arrangement with the sealing body as a result of the deformation of the sealing body and the

Resilience of the resilient material, the sealing lips or the sealing foot are pretensioned against the respective sealing surfaces on which the sealing lips or the sealing foot rest. Flier through will ^p i nnAi srv? R \ / vo

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6 achieves improved sealing of the fluid channel delimited by the tubular body arrangement.

An advantageous development of the tubular body arrangement provides that the sealing body joins the first tubular body in the area of a first axial one

End portion of the first tubular body connects to the second tubular body in the region of a second axial end portion. With nested

Pipe bodies overlaps the first end portion of the first pipe body with the second axial end portion of the second pipe body that the sealing body is arranged radially between the two pipe bodies. A particularly effective sealing of the fluid channel delimited by the tubular body arrangement with respect to the surroundings surrounding the tubular body arrangement is thus advantageously achieved.

In a preferred embodiment of the tubular body arrangement, a receiving groove is provided in the first axial end section of the first tubular body. The receiving groove is annular in a wall of the first tubular body. The sealing body is received in the receiving groove, the sealing foot resting against the base of the receiving groove along the foot direction. With the help of the receiving groove, the position of the sealing body in the is advantageous

Pipe body arrangement reliably and reproducibly established.

In the assembled state, the primary sealing lip and the secondary sealing lips of the sealing body are expediently elastically deformed in comparison to their shape in a state without significant external stress. As a result of this elastic deformation, the primary sealing lip and the first lie

Secondary sealing lip on the second axial end portion of the second

Pipe body on, whereby the sealing effect achieved can be improved. Due to the elastic deformation of the primary sealing lip and the first secondary sealing lip, the primary sealing lip and the first secondary sealing lip are against the second ^p i nnAi sfv? R \ / \ / o

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7 biased axial end portion of the second tubular body. The second

In the assembled state, the secondary sealing lip can rest against the foot section adjacent to it and thus be supported on this foot section. As a result, a particularly reliable sealing of the fluid channel is achieved both in the case of excess pressure and in the event of negative pressure in the fluid channel with respect to the surroundings of the tubular body arrangement.

In the assembled state, the primary sealing lip preferably rests in the opposite direction to the first secondary sealing lip on the second tubular body opposite the sealing base. Particularly preferably, the primary sealing lip abut against the foot direction and the first secondary sealing lip in the foot direction on the second tubular body. Thus, regardless of a direction of the acting pressure, either the primary sealing lip or the second secondary sealing lip is pressed against the second tubular body. As a result, a reliable seal between the pipe bodies is achieved in all pressure states - that is, regardless of a direction of the pressure gradient acting on the Dichtungskör.

If the pressure gradient decreases in the foot direction, the primary sealing lip is preferably pressed against the second tubular body. Preferably, if the pressure gradient increases in the foot direction, the first secondary sealing lip is pressed against the second tubular body. If there is negative pressure facing away from the sealing body in the opposite direction to the foot, the primary sealing lip can be detached from the second tubular body, but the first secondary sealing lip is sucked against the second tubular body 9b by means of the negative pressure. Conversely, if there is negative pressure facing away from the sealing body in the foot direction, the first secondary sealing lip can be detached from the second tubular body, but the primary sealing lip is sucked against the second tubular body by means of the negative pressure. Thus, the desirable sealing between the pipe bodies is achieved in any pressure condition. ^p i nnAi sfv? R \ / \ / o

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In particular, an angle between the primary sealing lip and the first secondary sealing lip in the assembled state has a value of 90 ° to 180 °. Appropriately, this angle between the primary sealing lip and the first secondary sealing lip Se is increased when mounting the tubular body assembly. This means that in the state without significant external load said angle is smaller than in the assembled state. Particularly preferably, in the assembled state, the primary sealing lip and the first secondary sealing lip are inclined in opposite directions relative to the second tubular body. This improves the sealing of the tubular body arrangement, which is independent of the direction of the pressure drop.

The invention also relates to an annular sealing body, which is preferably designed as a sealing ring, for a tubular body arrangement according to the invention as described above. Advantageously, the geometry of the profile of the annular sealing body enables an improved seal, not least in terms of manufacturing and cost aspects

Achieve a non-directional seal with both positive and negative pressure.

According to an advantageous development of the sealing body, it has a sealing base on which a primary sealing lip is arranged protruding. At a distance from the sealing base, two secondary sealing lips are formed on both sides protruding from the primary sealing lip. In a state without significant external stress, which exists, for example, as long as the sealing body is not installed in a tubular body arrangement, the sealing base extends in the profile of the sealing body in a base direction to which the primary sealing lip protrudes transversely from the sealing base. A first and a second secondary sealing lip protrude in the profile of the sealing body opposite one another and arranged at a distance from the sealing base in the state without substantial external load along the base direction from the primary sealing lip on both sides. The profile of the annular sealing body thus has a partially cross-like or x-like one ^p i nnAi sfv? R \ / \ / o

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Shape, wherein at one end of an axis formed by the primary sealing lip of the cross-like shape of the profile of the sealing base is formed in the form of a thickening. It advantageously allows this geometry of the profile of the annular sealing body, not least under manufacturing and

Cost aspects to achieve an improved non-directional seal both at overpressure and under pressure.

Another advantageous development of the ring-shaped sealing body provides that the primary sealing lip in the profile of the sealing body extends from

Sealing foot is designed to taper away. Likewise, the first and / or the second secondary sealing lip can be designed to taper away from the primary sealing lip. Each or one of the sealing lips can be attached to their

Sealing body facing away ends expediently have a radius. This tapered training of the primary or one or both

Secondary sealing lips can be applied particularly well to a sealing surface of a tubular body in order to achieve a particularly good seal.

According to a preferred embodiment of the sealing body, the sealing foot has a first and a second foot section, the first foot section merging into the second foot section along the foot direction. In addition, the sealing body comprises a compensation groove, the groove bottom of which is delimited by the primary sealing lip and the groove flanks of which are delimited by the first

Compensation groove or the compensation grooves allow an advantageous

Compensate for deformation of the sealing body in an assembled state in which the sealing body is installed in a tubular body arrangement ^p i nnAi sfv? R \ / \ / o

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10 or better to allow. In this way, a particularly effective sealing of a fluid channel delimited by the tubular body arrangement with respect to an environment surrounding the tubular body arrangement can be achieved. An assembly force to be applied by a worker for assembling the sealing body in a tubular body arrangement is advantageously reduced.

In a further preferred embodiment, the compensation groove in the profile of the sealing body tapers in the foot direction towards the primary sealing lip. Flierdurch is the deformation of the seal body in the

The assembled state can be compensated for particularly well.

In a further preferred embodiment of the sealing body, the groove flanks of the compensating groove are arranged in the profile of the sealing body at an acute angle to one another. It is thus advantageously achieved that when the sealing body is deformed in the assembled state of a tubular body arrangement with the sealing body, one of the secondary sealing lips can be better supported on the sealing base.

The primary sealing lip and at least one of the

A special embodiment of the sealing body provides that the secondary sealing lips protrude perpendicularly from the primary sealing lip when viewed in profile when there is no significant external load. Such an arrangement ^p i nnAi srv? R \ / vo

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1 1 of the secondary sealing lips enables a particularly effective sealing of a limited by a tubular body arrangement with the sealing body

Fluid channel with respect to an environment surrounding the tubular body arrangement outside.

Resilience of the resilient material, the sealing lips or the sealing foot are pretensioned against the respective sealing surfaces on which the sealing lips or the sealing foot rest. As a result, an improved sealing of the fluid channel delimited by the tubular body arrangement is achieved.

The sealing body according to the invention preferably corresponds to the following list:

1. Annular sealing body (1), in particular sealing ring,

in particular for a tubular body arrangement (8) with tubular bodies (9a, 9b), preferably in a motor vehicle,

wherein the sealing body (1) in profile, in particular in a state without significant external stress, has a sealing foot (2) extending along a foot direction (F) from which a primary sealing lip (3) protrudes transversely to the foot direction (F),

wherein in profile, especially in the state without significant external load, a first and a second secondary sealing lip (4a, 4b) protrude along the foot direction (F) from the primary sealing lip (3) on both sides, opposite one another and at a distance from the sealing foot (2).

2. Sealing body (1) according to 1., pmnA i Rfv? R \ / vo

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12 characterized in that

the profile of the primary sealing lip (3) tapers away from the sealing base (2); or / and that

the first and / or second secondary sealing lip (4a, 4b) from the

Primary sealing lip (3) tapers away;

3. Seal body (1) according to 1. or 2.,

characterized in that

the sealing foot (2) along the foot direction (F) from a first

Foot section (5a) merges into a second foot section (5b),

the sealing body (1) has a compensating groove (6) to compensate for deformation of the sealing body (1) in an assembled state (7), the groove bottom (6a) of which is delimited by the primary sealing lip (3) and the groove flanks (6b, 6c) of the first Foot section (5a) of the sealing foot (2) and the first secondary sealing lip (4a) is limited.

4. Seal body (1) according to 3.,

characterized in that

the compensation groove (6) in the profile in the foot direction (F) to

Primary sealing lip (3) tapers out.

5. Seal body (1) according to 3. or 4.,

characterized in that

the two groove flanks (6b, 6c) of the compensation groove (6) are arranged in the profile at an acute angle (a) to one another.

6. Seal body (1) according to 1., 2., 3., 4. or 5.,

characterized in that ^p i nnAi sfv? R \ / \ / o

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13 the primary sealing lip (3) and / or a secondary sealing lip (4), preferably the first and the second secondary sealing lip (4a, 4b), and / or the

Sealing foot (2) are integrally formed on the sealing body (1).

7. Seal body (1) according to 1., 2., 3., 4., 5. or 6.,

characterized in that

the secondary sealing lips (4) are designed to extend perpendicular to the primary sealing lip (3) in profile in the state without significant external stress.

8. Seal body (1) according to 1., 2., 3., 4., 5., 6. or 7.,

characterized in that

the sealing body (1), in particular the primary sealing lip (3) and / or a secondary sealing lip (4), preferably the first and the second

Secondary sealing lip (4a, 4b) and / or the sealing base (2) consist of a resilient material or comprise a resilient material.

The invention also relates to a method for assembling a tubular body arrangement as presented above. The method according to the invention has method steps a) to g). According to a first

Method step a) the first and the second tubular body and the sealing body are provided. A further, second method step b) consists in arranging the sealing body in the axial end section of the first tubular body. The sealing body can be arranged in a receiving groove in the axial end section of the first tubular body. A third

Method step c) provides that the first and the second tubular body are pushed into one another. This sliding into one another can preferably take place telescopically. When they are pushed into one another, the sealing body is arranged between the first and the second tubular body in the area of the two axial end sections of the tubular body. In a fourth step d) the ^p i nnAi sfv? R \ / \ / o

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Primary sealing lip applied to the second axial end portion of the second tubular body. According to a fifth method step e), the primary sealing lip is elastically deformed against the second axial end section of the second tubular body. As a result, the secondary sealing lips arranged on the primary sealing lip are moved. The first

Secondary sealing lip in the direction of the second axial end section of the second tubular body, ie away from the first foot section. As a result, the second secondary sealing lip arranged opposite the first secondary sealing lip on the primary sealing lip is moved in the direction of the foot section adjacent to it. Viewed in the profile of the tubular body, the elastic deformation of the primary sealing lip corresponds to a bending deformation. Another, sixth

Method step f) provides that the first secondary sealing lip is applied to the second axial end section of the second tubular body. Thus, both the primary sealing lip and the first secondary sealing lip then rest on the second axial end section of the second tubular body. In a seventh

Process step g) is the primary sealing lip and / or the first

Secondary sealing lip biased against the second axial end portion of the second tubular body as a result of the elastic deformation in step e). The advantages of the sealing body according to the invention and the tubular body arrangement according to the invention explained above are transferred to the

Method according to the invention for assembling a tubular body arrangement.

Correspondingly, with the method according to the invention for assembling such a tubular body arrangement, a non-directional tightness of a tubular body arrangement can be achieved, both in terms of production engineering and cost aspects.

In process step e), the second secondary sealing lip is expediently moved until it comes into contact with the second foot section. This results in an additional method step h), according to which the second secondary sealing lip is supported on the second foot section adjacent to it. This is advantageous in preloading the primary sealing lip or the first ^p i nnAi sfv? R \ / \ / o

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Secondary sealing lip against the second axial end section and thus also the sealing effect improved.

Further important features and advantages of the invention emerge from the subclaims Un, from the drawings and from the associated description of the figures based on the drawings.

It goes without saying that the features mentioned above and those yet to be explained below can be used not only in the respectively specified combination, but also in other combinations or alone, without departing from the scope of the present invention.

Preferred exemplary embodiments of the invention are shown in the drawings and are explained in more detail in the following description, with the same reference numerals referring to the same or similar or functionally identical components.

They each show schematically:

Fig. 1 is an example of a profile of a sealing body according to the invention,

Fig. 2 to Fig. 4 deformation states of the profile of the exemplary sealing body during assembly of a tubular body arrangement according to the invention with the sealing body as snapshots,

Fig. 5 to Fig. 7 shows an example of a tubular body arrangement according to the invention with the sealing body in various snapshots during assembly in perspective views, pmnA i Rfv? R \ / vo

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Fig. 8 shows an exemplary tubular body arrangement in a perspective exploded view.

FIG. 1 shows an example of a profile of an annular sealing body 1 according to the invention. The sealing body 1 can be designed as a sealing ring and is used for the fluid-tight connection of tubular bodies 9 of a fluid line. The tubular body 9 can limit an air, fuel or oil line, for example in a motor vehicle. In a substantially or even completely unloaded state, the sealing body 1 has the profile shown in FIG. This state without significant external stress exists, for example, as long as the sealing body 1 has not yet been installed in a tubular body arrangement 8.

The sealing body 1 has in profile in the state without significant external load on a sealing base 2, which extends along a base direction F it. A first foot section 5a merges into a second foot section 5b along a foot direction F. A primary sealing lip 3 projects from the sealing base 2 transversely to the base direction F. A first and a second secondary sealing lip 4a, 4b protrude from the primary sealing lip 3 at a distance from the sealing base 2 on both sides of the primary sealing lip 3 and opposite one another. According to FIG. 1, the primary sealing lip 3 tapers away from the sealing base 2. Likewise, the first and / or the second secondary sealing lip 4a, 4b can taper away from the primary sealing lip 3.

Viewed perpendicular to the foot direction F, a compensation groove 6 is arranged on both sides of the primary sealing lip 3 between tween the sealing base 2 and the secondary sealing lips 4. A deformation of the Dichtungskör pers 1 in an assembled state 7 can be compensated for by means of the compensating grooves 6. The compensation groove 6 is delimited by a groove bottom 6a and two groove flanks 6b, 6c. The groove flanks 6b, 6c are from the first foot section 5a and the second foot section 5b of the ^p i nnAi sfv? R \ / \ / o

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Sealing foot 2 and formed by the first secondary sealing lip 4a and the second secondary sealing lip 4b. The primary sealing lip 3 correspondingly forms the groove bottom 6a. The compensation groove 6 tapers in the profile of the sealing body 1 parallel to the foot direction F to the primary sealing lip 3. Correspondingly, the two groove flanks 6b, 6c of the compensation groove 6 are arranged in the profile of the sealing body 1 at an acute angle α to one another. The two groove flanks 6b,

6c merge into the groove base 6a in a radius.

The primary sealing lip 3 and the secondary sealing lips 4 as well as the sealing base 2 are formed integrally on the sealing body 1 in the example of FIG. The secondary sealing lips 4 extend in the profile of the sealing body 1, as can be seen in FIG. 1, at least in the state without significant external loading perpendicular to the primary sealing lip 3. In alternative designs of the sealing body 1, it is also conceivable to use the secondary sealing lips 4 to be arranged at an acute or obtuse angle to the primary sealing lip 3. The sealing body 1 expediently consists of a resilient material or comprises such a resilient material. It is also possible that only the primary sealing lip 3 and / or one or both secondary sealing lips 4 and / or the sealing base 2 consist at least partially of the resilient material.

FIGS. 2 to 4 show in various snapshots how the sealing body 1, viewed in profile, is deformed during the assembly of a tubular body arrangement 8 with such a sealing body 1. In FIG. 4, a state of assembly 7 of the tubular body arrangement 8 is shown. Such a tubular body arrangement 8 can be implemented, for example, as an air, fuel or oil line arrangement with tubular bodies 9, for example in a motor vehicle.

The tubular body arrangement 8 comprises a first and a second tubular body 9a, 9b. The first and the second tubular body 9a, 9b are in the Zusbauzu stand 7 telescopically and releasably plugged into one another. In the assembly stand 7, the tubular bodies 9 together delimit a fluid channel 10. The two ^p i nnAi sfv? R \ / \ / o

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18 nested tubular body 9 are connected to the miteinan by means of the sealing body 1. The fluid channel 10 - see also FIGS. 5 to 8 in this regard - is sealed off from an external environment 11 of the two tubular bodies 9 by the sealing body 1.

The first tubular body 9a has a first axial end portion 12a, and the second tubular body 9b has a second axial end portion 12b. The first axial end portion 12a of the first tubular body 9a and the second axial Endab section 12b of the second tubular body 9b are arranged in the assembled state 7 of the tubular body arrangement 8 overlapping one another. The sealing body 1 is arranged radially between the two tubular bodies 9, that is to say radially between the first axial end section 12a of the first tubular body 9a and the second axial end section 12b of the second tubular body 9b. The sealing body 1 connects the first tubular body 9a with the second tubular body 9b in the overlap area of the first axial end section 12a of the first tubular body 9a with the second axial end section 12b of the second tubular body 9b.

The sealing body 1 is also received in a receiving groove 13. On the receiving groove 13 is formed circumferentially on the first tubular body 9a. As can be seen in particular in FIGS. 2 to 4, the sealing base 2 rests on the base 13 a of the receiving groove 13 along the base direction F. Flierzu the Dichtungskör by 1 and the receiving groove 13 are geometrically matched. In the assembly state 7 together, the sealing body 1 is deformed compared to a state without significant external stress. This deformation can be understood, for example, by comparing the profile of the sealing body 1 in FIG. 2 and FIG. 4. As can be seen particularly in FIG. 4, in the assembled state 7 both the primary sealing lip 3 and the first secondary sealing lip 4a rest on the second axial end section 12b of the second tubular body 9b. Due to the elastic deformation of the primary sealing lip 3 and the first secondary sealing lip 4a, the primary sealing lip 3 and the first secondary sealing lip 4a are in front of the second axial end section 12b of the second tubular body 9b. ^p i nnAi sfv? R \ / \ / o

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19 excited. In the assembled state 7, the second secondary sealing lip 4b rests against the second foot section 5b adjacent to it. Thus, the second secondary sealing lip 4b is supported on the second foot section 5b.

In the example of the tubular body arrangement 8 in FIGS. 5 to 8, the sealing body 1 is designed so that the sealing base 2 is located radially on the outside and the primary sealing lip 3 and the secondary sealing lip 4 arranged on the primary sealing lip 3 are located radially on the inside. It is also conceivable to arrange the sealing base 2 radially on the inside and the primary sealing lip 3 as well as the secondary sealing lips 4 projecting from the primary sealing lip 3 on the radially outside.

As already explained, the scope of the present invention also extends to a method for assembling the tubular body arrangement 8, as has already been described above with reference to FIGS. 2 to 4. This method for mounting or assembling the tubular body arrangement 8 can also be understood with the aid of FIGS. 5 to 7. The method for assembling the tubular body assembly 8 comprises several steps. In a first step a) the first and the second tubular body 9a, 9b and the sealing body 1 are provided. Then, as shown for example in Figures 6 and 7, the sealing body 1 is arranged according to a second step b) in the axial end portion 12a of the first tubular body 9a. The sealing body 1 is received in the receiving groove 13 shown in FIGS. 5 and 8. In a third process step c), the first and the second tubular body 9a, 9b are pushed telescopically into one another. It goes without saying that for this purpose the outer and inner diameters of the two tubular bodies 9a, 9b are matched to one another accordingly. The method for assembling a tubular body arrangement 8 comprises, in addition to the fourth step d), in which the primary sealing lip 3 is applied to the axial end section 12b of the second tubular body 9b. This method step d) can also be understood in particular with the aid of FIG. In a further, fifth step e), the primary sealing lip 3 is elastically deformed against the second axial end section 12b of the second tubular body 9b. As a result of this ^p i nnAi sfv? R \ / \ / o

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Deformation of the primary sealing lip 3, the first secondary sealing lip 4a arranged on the primary sealing lip 3 is moved in the direction of the second axial end section 12b of the second tubular body 9b. As a result, the first secondary sealing lip 4a is moved away from the first foot portion 5a of the sealing body 1 adjacent to it. The second secondary sealing lip 4b arranged opposite the first secondary sealing lip 4a on the primary sealing lip 3 is moved as a result of the deformation of the primary sealing lip 3 in the direction of the second base section 5b adjacent to it. In a sixth step f), the first secondary sealing lip 4a is also applied to the second axial end section 12b of the second tubular body 9b in addition to the primary sealing lip 3. The primary sealing lip 3 and the first secondary sealing lip 4a are biased against the second axial end section 12b of the second tubular body 9b as a result of the elastic deformation in step e) in a seventh step g). Thus, a limited by the first tubular body 9a and the second tubular body 9b fluid channel 10 ge compared to an external environment 11 of the tubular body assembly 8 is effectively sealed off. In a step h), the second secondary sealing lip 4b is also supported on the second foot section 5b adjacent to it.

In FIG. 2, the sealing body 1 is already arranged in the receiving groove 13 of the first tubular body 9a according to method step b).

In the figure 3, the telescopic sliding into one another takes place according to step c) of the first and the second tubular body 9a, 9b. It can be seen how the primary sealing lip 3 according to step d) is placed on the second axial end section 12b of the second tubular body 9b. The elastic deformation according to step e) of the primary sealing lip 3 can also be seen, as a result of which the first secondary sealing lip 4a is moved in the direction of the second axial end section 12b of the second tubular body 9b and the second secondary sealing lip 4b is moved in the direction of the second base section 5b adjacent to it . As a result of this movement according to method step e), the first secondary seal is in a step f) ^p i nnAi sfv? R \ / \ / o

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21 lip 4a applied to the second axial end portion 12b of the second tubular body 9b.

In FIG. 4, the tubular body arrangement 8 is illustrated in the assembled state 7 as a result of the implementation of the method for assembling such a tubular body arrangement 8.

In addition, further snapshots of the method for assembling a tubular body arrangement 8 are illustrated in perspective representations in FIGS.

FIGS. 5 and 6 illustrate method step b), according to which the sealing body 1 is arranged in the receiving groove 13 in the region of the first axial end section 12a of the first tubular body 9a. In Figure 7, the sealing body 1 is already arranged in the receiving groove 13 in the end section 12a of the first tubular body 9a and the second tubular body 9b can be pushed into the first tubular body 9a according to process step c) so that the first axial end section 12a of the first Tubular body 9a telescopically overlaps with the second axial end portion 12b of the second tubular body 9b.

FIG. 8 shows the components of the tubular body arrangement 8 in perspective in an exploded view. Correspondingly, the first tubular body 9a with the receiving groove 13 and the annular sealing body 1 and the second tubular body 9b are illustrated here.

FIG. 4 also shows that the primary sealing lip 3 in the assembled state 7 rests in the opposite direction to the first secondary sealing lip 4a on the second tubular body 9b opposite the sealing base 2. In the example shown, the primary sealing lip 3 rests against the foot direction F and the first secondary sealing lip 4a rests against the second tubular body 9b in the foot direction. Thus, regardless of a direction of the applied pressure, either the ^p i nnAi sfv? R \ / \ / o

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22nd

Primary sealing lip 3 or the second secondary sealing lip 4a pressed against the second tubular body 9b. As a result, a reliable seal between the tubular bodies 9a, 9b is achieved in all pressure states - that is, regardless of a direction of the pressure gradient acting on the sealing body 1.

Thus, if the pressure gradient in the foot direction F decreases, the primary sealing lip 3 is pressed against the second tubular body 9b. If the pressure gradient in the foot direction F increases, the first secondary sealing lip 4a is pressed against the second Rohrkör by 9b. If there is negative pressure facing away from the sealing body 1 against the foot direction F, the primary sealing lip 3 can be detached from the second tubular body 9b, but the first secondary sealing lip 4a is sucked against the second tubular body 9b by means of the negative pressure. If there is negative pressure facing away from the sealing body 1 in the foot direction F, the first secondary sealing lip 4a can be detached from the second tubular body 9b, but the primary sealing lip 3 is sucked against the second tubular body 9b by means of the negative pressure. Thus, the reliable sealing between tween the pipe bodies 9a, 9b is achieved in every pressure state.

In addition, FIG. 4 shows that an angle between the primary sealing lip 3 and the first secondary sealing lip 4a in the assembled state 7 has a value of 90 ° to 180 °. A comparison of the figures 2 and 4 shows that this angle between the primary sealing lip 3 and the first secondary sealing lip 4a is increased when the tubular body arrangement 8 is installed. This means that in the state shown in Figure 2 without significant external load, said angle is smaller than in the assembled state 7 illustrated in Figure 4. In the assembled state, the primary sealing lip 3 and the first secondary sealing lip 4a are in opposite directions to the second tubular body 9b Inclined direction.

Claims

pmnA i Rfv? R \ / vo WO 2020/201188 PCT / EP2020 / 058903 23 patent claims

1. tubular body arrangement (8), in particular air, fuel or

Oil line arrangement with tubular bodies (9), preferably in one

Motor vehicle,

with a first and a second tubular body (9a, 9b) which are detachably, preferably telescopically, plugged into one another in one

Assembled state (7) together delimit a fluid channel (10), the two nested tubular bodies (9) being connected to one another by means of an annular sealing body (1), in particular a sealing ring, so that the sealing body (1) opposes the fluid channel (10) the outer environment (11) of the two tubular bodies (9) seals,

2. tubular body arrangement (8) according to claim 1,

characterized in that

the first and / or second secondary sealing lip (4a, 4b) from the

Primary sealing lip (3) tapers away;

3. tubular body arrangement (8) according to claim 1 or 2, pmnA i Rfv? R \ / vo

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24 characterized in that

the sealing foot (2) along the foot direction (F) from a first

Foot section (5a) merges into a second foot section (5b),

the sealing body (1) has a compensation groove (6) to compensate for a

Deformation of the sealing body (1) in an assembled state (7), the groove bottom (6a) of which is delimited by the primary sealing lip (3) and the groove flanks (6b, 6c) of the first foot section (5a) of the sealing foot (2) and the first Secondary sealing lip (4a) is limited.

4. tubular body arrangement (8) according to claim 3,

characterized in that

the compensation groove (6) in the profile in the foot direction (F) to

Primary sealing lip (3) tapers out.

5. tubular body arrangement (8) according to claim 3 or 4,

characterized in that

6. tubular body arrangement (8) according to any one of the preceding claims, characterized in that

the primary sealing lip (3) and / or a secondary sealing lip (4), preferably the first and the second secondary sealing lip (4a, 4b), and / or the

Sealing foot (2) are integrally formed on the sealing body (1).

7. tubular body arrangement (8) according to any one of the preceding claims, characterized in that

the secondary sealing lips (4) are designed to extend perpendicular to the primary sealing lip (3) in profile in the state without significant external stress. ^p i nnAi sfv? R \ / \ / o

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25th

8. tubular body arrangement (8) according to any one of the preceding claims, characterized in that

9. tubular body arrangement (8) according to any one of the preceding claims, characterized in that

the sealing body (1) connects a first axial end section (12a) of the first tubular body (9a) with a second axial end section (12b) of the second tubular body (9b) which, when the tubular bodies (9) are inserted into one another, with the first axial end section (12a) of the first tubular body (9a) overlaps, so that the sealing body (1) is arranged radially between the two tubular bodies (9).

10. tubular body arrangement (8) according to any one of the preceding claims, characterized in that

the sealing body (1) is received in a receiving groove (13) of the first tubular body (9a), the sealing foot (2) bearing against the base (13a) of the receiving groove (13) along the foot direction (F).

11. tubular body arrangement (8) according to any one of the preceding claims, characterized in that

in the assembled state (7) the primary sealing lip (3) and the

Secondary sealing lips (4) of the sealing body (1) are elastically deformed with respect to a state without significant external stress, so that both the primary sealing lip (3) and the first secondary sealing lip (4a) on the second axial end section (12b) of the second tubular body (9b) issue, ^p i nnAi sfv? R \ / \ / o

WO 2020/201188 PCT / EP2020 / 058903

26 wherein the primary sealing lip (3) and the first secondary sealing lip (4a) are pretensioned against the second axial end section (12b) of the second tubular body (9b) due to their elastic deformation, and preferably the second secondary sealing lip (4b) lying against the second adjacent to it Foot section (5b) is supported on the same.

12. Annular sealing body (1), in particular sealing ring, for a

Pipe body arrangement (8) according to one of the preceding claims.

13. sealing body (1) according to claim 12,

characterized in that

the sealing body (1) in profile, in particular in a state without significant external load, has a sealing foot (2) extending along a foot direction (F) from which a primary sealing lip (3) protrudes transversely to the foot direction (F),

14. sealing body (1) according to claim 13,

characterized in that

the first and / or second secondary sealing lip (4a, 4b) from the

Primary sealing lip (3) tapers away;

15. Sealing body (1) according to claim 13 or 14,

characterized in that

the sealing foot (2) along the foot direction (F) from a first

Foot section (5a) merges into a second foot section (5b), ^p i nnAi sfv? R \ / \ / o

WO 2020/201188 PCT / EP2020 / 058903

27 the sealing body (1) has a compensating groove (6) to compensate for a deformation of the sealing body (1) in an assembled state (7), the groove bottom (6a) of which is delimited by the primary sealing lip (3) and whose groove flanks (6b, 6c) from the first foot section (5a) of the sealing foot (2) and the first secondary sealing lip (4a) is limited.

16. sealing body (1) according to claim 15,

characterized in that

the compensation groove (6) in the profile in the foot direction (F) to

Primary sealing lip (3) tapers out.

17. Sealing body (1) according to claim 15 or 16,

characterized in that

18. Sealing body (1) according to one of claims 13 to 17,

characterized in that

Sealing foot (2) are integrally formed on the sealing body (1).

19. Sealing body (1) according to one of claims 13 to 18,

characterized in that

20. Sealing body (1) according to one of claims 13 to 19,

characterized in that ^p i nnAi sfv? R \ / \ / o

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28 of the sealing body (1), in particular the primary sealing lip (3) and / or a secondary sealing lip (4), preferably the first and the second

21. A method for assembling a tubular body arrangement (8) according to one of claims 1 to 11, comprising the following steps:

a) providing the first and the second tubular body (9a, 9b) and the sealing body (1), which is preferably a sealing body according to one of claims 12 to 20,

b) arranging the sealing body (1) in the first axial end section (12a) of the first tubular body (9a), preferably arranging the sealing body (1) in a receiving groove (13) in the axial end section (12a) of the first tubular body (9a),

c) sliding into one another, in particular telescopic sliding into one another, of the first and second tubular bodies (9a, 9b),

d) placing the primary sealing lip (3) on the second axial end section (12b) of the second tubular body (9b),

e) elastic deformation of the primary sealing lip (3) against the second axial end portion (12b) of the second tubular body (9b), whereby the on the

Primary sealing lip (3) arranged first secondary sealing lip (4a) in the direction of the second axial end section (12b) of the second tubular body (9b) and away from the first foot section (5a) and which is opposite the first secondary sealing lip (4a) on the primary sealing lip (3 ) arranged second secondary sealing lip (4b) is moved in the direction of the second foot section (5b) adjacent to it,

f) Applying the first secondary sealing lip (4a) to the second axial one

End section (12b) of the second tubular body (9b), ^p i nnAi sfv? R \ / \ / o

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29 g) Pre-tensioning the primary sealing lip (3) and / or the first secondary sealing lip (4a) as a result of the elastic deformation in step e) against the second axial end section (12b) of the second tubular body (9b).

22. The method according to claim 21,

characterized in that

the second secondary sealing lip (4b) is moved in step e) until contact is made with the second foot section (5b) in the direction of the latter, so that the method with the support of the second

Secondary sealing lip (4b) on the second foot section (5b)

additional step h).