Sealing system and method for producing a sealing system

Abstract

In order to improve a sealing system, it is proposed that the sealing system (100) comprises at least one sealing body (120), wherein the sealing body (120) has at least one sealing surface (312, 314, 316) which is directed radially outwards with respect to a seal axis (122) and at least one sealing surface (312, 314, 316) which is directed radially inwards with respect to the seal axis (122), and wherein the sealing body (120) has a joint (352), wherein two partial pieces (356, 358) of the sealing body (120) are joined to one another at the joint (352), and / or wherein the sealing body (120) is at least partly formed into its shape by rolling.

Description

[0001] Sealing system and method for producing a sealing system

[0002] Description

[0003] The invention relates to a sealing system, in particular a sealing system for a hot gas application and / or for a combustion device, for example a sealing system for a motor vehicle, and a method for producing a sealing system.

[0004] The object underlying the invention is to improve a sealing system and / or a method for producing a sealing system.

[0005] In embodiments of the invention, the underlying object is achieved by a sealing system, wherein the sealing system comprises at least one sealing body, wherein the sealing body has at least one sealing surface directed radially outwards with respect to a sealing axis and at least one sealing surface directed radially inwards with respect to the sealing axis and wherein the sealing body has a joint, wherein two parts of the sealing body are joined to one another at the joint.

[0006] Advantageously, in the solution according to the invention, the sealing body can be produced from a (particularly one-piece) product, in particular an elongated product and, for example, a strip product, wherein the product is joined, in particular at two longitudinal ends thereof, preferably to form a ring blank (thus creating the joint). Advantageously, this at least reduces and advantageously minimizes material loss during the manufacturing process of the sealing body and thus of the sealing system. In particular, the sealing body has exactly one joint.

[0007] In embodiments of the invention, the underlying object is achieved by a sealing system, wherein the sealing system comprises at least one sealing body, wherein the sealing body has at least one sealing surface directed radially outward with respect to a sealing axis and at least one sealing surface directed radially inward with respect to the sealing axis, and wherein the sealing body is at least partially formed into its shape by rolling.

[0008] For example, one advantage of the solution according to the invention is that the sealing body can be formed into shapes that are particularly advantageous for sealing by at least partial rolling.

[0009] A particular advantage of the solution according to the invention is that, due to the at least partial rolling, the sealing body has more favorable surface properties, particularly those that are more favorable for sealing. In particular, the rolling can achieve a smoother surface and thus advantageously smoother sealing surfaces on the sealing body, so that the sealing effect of the sealing body is advantageously improved. Advantageously, the at least partial rolling allows the sealing body to be easily formed into a favorable shape and / or provided with favorable sealing surfaces, so that advantageously no post-forming treatment is required.

[0010] In particular, a structure typical of rolling is created in the material of the sealing body and / or on the surfaces of the sealing body, so that it is recognizable on the produced sealing body, at least from its material structure and / or its surfaces, that the sealing body was produced by at least partial rolling. In particular, a structure created during rolling and / or a surface machined by rolling differs from a structure and / or a surface created, for example, during a pressing process for forming.

[0011] In particularly advantageous embodiments, the sealing body has at least one joint and is at least partially burnished. In particular, it is provided that the (joined) ring blank is formed into the sealing body at least partially, and advantageously at least largely, by burnishing.

[0012] In particular, the sealing body is designed and constructed as a sealing element for radial sealing. Advantageously, the sealing body acts as a sealing element for radial sealing when the sealing system is assembled.

[0013] In particular, the at least one radially outwardly directed sealing surface and the at least one radially inwardly directed sealing surface each extend in a circumferential direction of the sealing axis in a closed manner around the sealing axis.

[0014] Preferably, the sealing body is formed in one piece.

[0015] Advantageously, the sealing surfaces of the seal body are spaced apart from one end edge of the seal body. This advantageously prevents any shape inaccuracies at the end edge from adversely affecting the sealing effect.

[0016] It is preferably provided that at least one sealing surface of the sealing body is a curved surface.

[0017] A particular advantage of a curved sealing surface is that it fits more effectively against another surface of the sealing system, such as the wall surface of a pipe end piece where the sealing body is intended to seal, thus improving the seal. Advantageously, a curved sealing surface can respond more flexibly to dynamic loads, ensuring reliable sealing even under such loads.

[0018] For example, a curved surface can be formed more precisely, so that the risk of leaks in the curved sealing surface can at least be reduced.

[0019] For example, a sealing system with a sealing body having at least one curved sealing surface can be installed more easily, making production advantageously more cost-effective and / or less prone to defects. In particular, a sealing body with at least one curved sealing surface can be inserted more easily into a gap in which the sealing body is intended to seal.

[0020] In particular, at least one of the following is provided:

[0021] - that at least one radially inwardly directed sealing surface is a curved surface; and / or

[0022] - that at least one radially outwardly directed sealing surface is a curved surface; and / or

[0023] - that at least one curved sealing surface is a convex curved surface; and / or

[0024] - that at least one curved sealing surface is curved in a radial cross-section and / or has a bend in a radial cross-section; and / or

[0025] - that at least one curved sealing surface extends in a circumferential direction of the sealing axis in a closed manner around the sealing axis, and the bend of the curved sealing surface is formed transversely to the course in the circumferential direction. In favorable embodiments, the sealing body has at least one radial curvature.

[0026] Advantageously, the sealing body is designed to be at least partially flexible, in particular at least partially dimensionally flexible and / or at least partially elastically flexible. This can advantageously improve the sealing effect. For example, the sealing body can be installed in the sealing system under prestress.

[0027] In particular, the radial curvature runs in the direction of rotation of the sealing axis in a closed manner around the sealing axis.

[0028] Advantageously, the radial curvature is curved transversely to its course (the course in the direction of rotation).

[0029] In particular, the sealing body is designed to be curved in the radial direction in the case of the radial curvature.

[0030] In particular, the radial curvature of the sealing body has at least one curvature head section and / or two curvature leg sections.

[0031] In particular, the two bulge leg sections each extend obliquely to the radial direction and obliquely to the axial direction of the seal axis, in particular from the bulge head section.

[0032] Advantageously, the two arch leg sections extend (in particular away from the arch head section) such that an axial distance between the two arch leg sections increases with increasing extension.

[0033] In particular, the two bulge leg sections are each integrally formed on the bulge head section in one region. In this region, the two bulge leg sections are axially spaced from each other. The axial distance between the two bulge leg sections is smallest in this region, and the axial distance increases with increasing distance from the bulge head section.

[0034] In particular, the sections of the radial curvature, in particular the curvature head section and / or the two curvature leg sections, each run in the circumferential direction of the sealing axis in a closed manner around the sealing axis.

[0035] Advantageously, at least one sealing surface of the sealing body is formed on at least one radial curvature of the sealing body.

[0036] In particular, at least one sealing surface of the sealing body is formed on the bulge head portion of the radial bulge.

[0037] Advantageously, the radial curvature is designed to be at least partially flexible, at least in the radial direction, so that a particularly good sealing effect is advantageously achieved by this at least partially flexible design of the sealing surface on the radial curvature.

[0038] In particular, the sealing body has at least one end section and in particular two end sections.

[0039] In particular, at least one of the following is provided:

[0040] - that at least one end section and advantageously at least both of the at least two end sections each run / run in the circumferential direction of the sealing axis in a closed manner around the sealing axis; and / or

[0041] - that at least one end section is arranged on the radial curvature of the sealing body and in particular is arranged on a curvature leg section of the radial curvature, wherein advantageously one of the two end sections is arranged on one of the two curvature leg sections and the other of the two end sections is arranged on the other of the two curvature leg sections; and / or

[0042] - that an axial extension of the sealing body ends at at least one end section of the sealing body and in particular that the axial extension of the sealing body ends axially at each of the at least two end sections of the sealing body.

[0043] In particular, the two end portions of the seal body (relative to the axial direction of the seal axis) are formed on axially opposite sides of the seal body. In particular, the seal body extends in the axial direction from one of the two end portions to the other of the two end portions.

[0044] Advantageously, a sealing surface is formed on at least one end portion of the sealing body. For example, the sealing surface is thus conveniently located on the at least one end portion for sealing.

[0045] Advantageously, the at least one end section is at least partially flexibly mounted, so that a particularly good seal can be achieved with the sealing surface on the at least one end section.

[0046] Advantageously, a sealing surface is formed on each of the at least two end sections.

[0047] It is particularly advantageous if at least one end section of the sealing body is a curved section of the sealing body, and preferably both of the at least two end sections of the sealing body are each a curved section of the sealing body. For example, this is advantageous for assembling the sealing system, since a sealing body with at least one curved end section can be inserted more effectively into a gap in which the sealing body is intended to seal. For example, the risk of the sealing body becoming jammed at its end section with another component of the sealing system, in particular with a surface on which the sealing body is intended to seal, is at least reduced.

[0048] It is particularly advantageous if a curved sealing surface is formed on the curved end section.

[0049] In particular, a curved sealing surface can be advantageously formed in this way. This advantageously combines the advantages of a curved end section and a curved sealing surface.

[0050] In advantageous embodiments, at least one cavity is formed in the sealing body. Advantageously, the cavity is at least partially, advantageously only partially, enclosed by the sealing body.

[0051] In particular, the sealing body can be designed to be at least partially flexible, in particular at least partially dimensionally flexible and / or at least partially elastically flexible. This advantageously improves the sealing effect of the sealing body.

[0052] For example, the sealing body with at least one cavity can be made lighter and / or with less material.

[0053] In particular, the cavity runs in the circumferential direction of the sealing axis in a closed manner around the sealing axis.

[0054] In particular, at least one of the following is provided:

[0055] - that the cavity is formed in the radial curvature of the sealing body; and / or

[0056] - that the cavity is open toward one radial side. In particular, the cavity is at least partially bounded on one radial side by the radial curvature, in particular by the curvature head section, and is open on a radially opposite side.

[0057] In particular, it is provided that the sealing body has at least two sealing surfaces in at least one radial orientation. In particular, the sealing body has at least two radially outwardly directed sealing surfaces and / or at least two radially inwardly directed sealing surfaces.

[0058] In particular, it is provided that the sealing body has a sealing surface on each of the at least two end sections and that the sealing surfaces on the two end sections are radially aligned in the same way.

[0059] In particular, the sealing surfaces at the two end sections are both directed radially inwards or both directed radially outwards.

[0060] This advantageously achieves particularly good sealing on the radial side with the two sealing surfaces.

[0061] In particular, it is provided that the two radially equally aligned sealing surfaces are formed on a radial side of the sealing body, wherein the cavity of the sealing body is open on this radial side.

[0062] In particular, the sealing body is made of a metallic material.

[0063] For example, this provides a particularly robust sealing body. In particular, the sealing body made of a metallic material can seal even at particularly high temperatures. Advantageously, the sealing body made of a metallic material is also resistant to high temperatures.

[0064] In particular, the high temperatures are at least 500 °C and, for example, at least 800 °C.

[0065] In particular, the joint is formed in one area, in particular in a narrowly defined area, wherein this area is narrowly defined in the direction of rotation of the sealing axis.

[0066] In particular, the joint is formed continuously in the sealing body in the axial direction and / or in the radial direction of the sealing axis.

[0067] Preferably, the two sections of the sealing body are firmly bonded together at the joint. For example, the two sections are welded together at the joint.

[0068] For example, the joint has a weld seam. In particular, the weld seam at the joint is continuous in the axial and / or radial directions of the sealing body.

[0069] In particular, the sealing system comprises at least two pipe end pieces.

[0070] Advantageously, the sealing body seals in the radial direction of the sealing axis between the two pipe end pieces. In particular, the sealing body is arranged in a sealing manner between the two pipe end pieces in the radial direction of the sealing axis. In particular, the sealing system is designed for a hot gas application.

[0071] In particular, the sealing system for hot gas applications is designed for applications in which temperatures of at least 500°C and / or more, for example, temperatures of at least 800°C and / or more, occur. For example, the temperature of a medium against which sealing is to be carried out is at least 500°C and / or more, for example, at least 800°C and / or more.

[0072] In particular, the sealing system is designed for a combustion device and advantageously for an exhaust line of the combustion device.

[0073] In particular, the combustion device comprises an internal combustion engine and advantageously an exhaust system for exhaust gases produced during combustion in the internal combustion engine.

[0074] In embodiments of the invention, the underlying object is achieved by an exhaust rod, in particular an exhaust line for a combustion device and / or for a motor vehicle, wherein the exhaust line comprises a sealing system with at least one feature and preferably with at least one combination of features of the features explained above and / or below.

[0075] In particular, at least two pipe end pieces are part of the exhaust system.

[0076] In advantageous embodiments, the underlying object is achieved by a method for producing a sealing system, wherein the method comprises at least the following method steps:

[0077] - Providing a strip product; and

[0078] - forming the strip product and joining the strip product to form a ring blank; and - shaping the ring blank to form a sealing body, wherein the shaping comprises at least the formation of at least one sealing surface directed radially inward relative to a sealing axis and at least one sealing surface directed radially outward relative to the sealing axis.

[0079] In particular, an advantage of the method according to the invention is that by producing the ring blank from a strip product, the ring blank and the subsequently formed sealing body can be produced with at least little material loss and, for example, with at least no significant material loss.

[0080] In particular, providing the strip product comprises providing a flat product and separating the strip product from a remainder of the flat product.

[0081] In advantageous embodiments, the underlying object is achieved by a method for producing a sealing system, wherein the method comprises at least forming a ring blank to form a sealing body, wherein the forming is carried out at least partially by rolling and the forming comprises at least the formation of at least one sealing surface directed radially inward with respect to a sealing axis and at least one sealing surface directed radially outward with respect to the sealing axis.

[0082] In particular, rolling can provide a sealing body with a particularly favorable sealing shape and / or with particularly favorable surfaces.

[0083] In particular, the sealing surfaces are formed at least partially by rolling. It is particularly advantageous if the ring blank, manufactured from a strip product, is formed at least partially by rolling.

[0084] In particular, in the method, the sealing body is provided with at least one feature and / or with at least one combination of features of the features explained above and / or below, and advantageously the method comprises at least one corresponding method step.

[0085] Advantageously, the formation of at least one, preferably curved, sealing surface and / or the formation of the radial curvature and / or the formation of the cavity and / or a reshaping of at least one end section, in particular into a curved end section, and / or the formation of further configurations in the sealing body takes place at least partially and preferably at least largely by the rolling process.

[0086] In order to avoid repetition, reference is therefore made in full to the above and / or following statements regarding a sealing system with a sealing body, in particular reference is made to the statements regarding the sealing surfaces and / or regarding the radial curvature and / or regarding the cavity and / or regarding at least one end section and / or regarding further configurations of the sealing body.

[0087] The description of solutions according to the invention thus includes in particular the various combinations of features defined by the following numbered embodiments:

[0088] 1. Sealing system (100), wherein the sealing system (100) comprises at least one sealing body (120), wherein the sealing body (120) has at least one sealing surface (312, 314, 316) directed radially outwards with respect to a sealing axis (122) and at least one sealing surface (312, 314, 318) directed radially inwards with respect to the sealing axis (122), and wherein the sealing body (120) has a joint (352), wherein two sections (356, 358) of the sealing body (120) are joined to one another at the joint (352).

[0089] 2. Sealing system (100), in particular according to the preceding embodiment, wherein the sealing system (100) comprises at least one sealing body (120), wherein the sealing body (120) has at least one sealing surface (312, 314, 316) directed radially outwards with respect to a sealing axis (122) and at least one sealing surface (312, 314, 318) directed radially inwards with respect to the sealing axis (122), and wherein the sealing body (120) is formed into its shape at least partially by rolling.

[0090] 3. Sealing system (100) according to one of the preceding embodiments, wherein at least one sealing surface (312, 314, 316, 318) of the sealing body (120) is a curved surface, wherein in particular at least one of the following is provided:

[0091] - that at least one radially inwardly directed sealing surface (312, 314, 318) is a curved surface; and / or

[0092] - that at least one radially outwardly directed sealing surface (312, 314, 316) is a curved surface; and / or

[0093] - that at least one curved sealing surface (312, 314, 316, 318) is a convexly curved surface; and / or

[0094] - that at least one curved sealing surface (312, 314, 316, 318) is curved in a radial cross-section and / or has a bend in a radial cross-section; and / or

[0095] - that at least one curved sealing surface (312, 314, 316, 318) extends in a circumferential direction (134) of the sealing axis (122) in a closed manner around the sealing axis (122), and the bend of the curved sealing surface (312, 314, 316, 318) is formed transversely to the course in the circumferential direction (134). 4. Sealing system (100) according to one of the preceding embodiments, wherein the sealing body (120) has at least one radial curvature (232).

[0096] 5. Sealing system (100) according to one of the preceding embodiments, wherein at least one sealing surface (312, 316, 318) of the sealing body (120) is formed on at least one radial curvature (232) of the sealing body (120), wherein in particular a sealing surface (312, 314, 316, 318) of the sealing body (120) is formed at least on one curvature head section (236) of the radial curvature (232).

[0097] 6. Sealing system (100) according to one of the preceding embodiments, wherein the sealing body (120) has at least one end section (252) and that a sealing surface (312, 314, 316, 318) is formed on at least one end section (252) of the sealing body (120), wherein in particular at least one of the following is provided:

[0098] - that at least one end section (252) in the circumferential direction (134) of the sealing axis (122) extends in a closed manner around the sealing axis (122); and / or

[0099] - that at least one end portion (252) is arranged on a radial curvature (232) of the sealing body (120), in particular on a curvature leg portion (238) of the radial curvature (232); and / or

[0100] - that an axial extension (216) of the sealing body (120) ends at at least one end section (252) of the sealing body (252) and in particular that the axial extension of the sealing body (120) ends axially at each of the at least two end sections (252) of the sealing body (120).

[0101] 7. Sealing system (100) according to one of the preceding embodiments, wherein at least one end portion (252) of the sealing body (120) is a curved portion of the sealing body (120) and in particular a curved sealing surface (314, 316, 318) is formed on the curved end portion (252).

[0102] 8. Sealing system (100) according to one of the preceding embodiments, wherein at least one cavity (292) is formed in the sealing body (120) and the cavity (292) is at least partially enclosed by the sealing body (120), wherein in particular at least one of the following is provided:

[0103] - that the cavity (292) is formed at the radial curvature (232) of the sealing body (120); and / or

[0104] - that the cavity (292) is open towards a radial side (272, 274).

[0105] 9. Sealing system (100) according to one of the preceding embodiments, wherein the sealing body (120) has at least two sealing surfaces (312, 314, 316, 318) in at least one radial orientation.

[0106] 10. Sealing system (100) according to one of the preceding embodiments, wherein the sealing body (120) has a sealing surface (314, 316, 318) at each of two end sections (252) and the sealing surfaces (314, 316, 318) are radially aligned in the same way at the two end sections (252).

[0107] 11. Sealing system (100) according to one of the preceding embodiments, wherein the sealing body (120) is formed from a metallic material.

[0108] 12. Sealing system (100) according to one of the preceding embodiments, wherein the two sections (356, 358) of the sealing body are integrally connected to one another at the joint (352), in particular welded together. 13. Sealing system (100) according to one of the preceding embodiments, wherein the sealing system (100) comprises at least two pipe end pieces (112, 114), wherein the sealing body (120) seals in the radial direction (138) of the sealing axis (122) between the two pipe end pieces (112, 114).

[0109] 14. Sealing system (100) according to one of the preceding embodiments, wherein the sealing system (100) is designed for a hot gas application and / or for a combustion device.

[0110] 15. Exhaust system, in particular for a combustion device and / or for a motor vehicle, comprising a sealing system (100) according to one of the preceding embodiments.

[0111] 16. A method for producing a sealing system (100), in particular for producing a sealing system (100) according to one of the preceding embodiments directed to a sealing system, wherein the method comprises at least the following method steps:

[0112] - providing (412) a strip product (414); and

[0113] - forming (452) the strip product (414) and joining (462) the strip product (414) to form a ring blank (466); and

[0114] - forming (472) the ring blank (466) into a sealing body (120), wherein the forming (472) comprises at least the formation of at least one sealing surface (312, 314, 318) directed radially inward with respect to a sealing axis (122) and at least one sealing surface (312, 314, 316) directed radially outward with respect to the sealing axis (122).

[0115] 17. Method, in particular method according to the preceding embodiment, for producing a sealing system (100), in particular for producing a sealing system (100) according to one of the preceding embodiments directed to a sealing system, wherein the method comprises at least one forming (472) of a ring blank (466) to form a sealing body (120), wherein the forming (472) is carried out at least partially by rolling and wherein the forming (472) comprises at least the formation of at least one sealing surface (312, 314, 318) directed radially inwards with respect to a sealing axis (122) and at least one sealing surface (312, 314, 316) directed radially outwards with respect to the sealing axis (122).

[0116] In the above and below, it is to be understood in particular that, for example, deviations of up to ±20%, preferably of up to ±10%, for example of up to ±5%, are included and / or that the feature is at least substantially provided for, in the case of features that are at least approximately provided.

[0117] In the above and below, it is to be understood in particular that, in the case of features that are at least essentially provided, deviations that are technically caused and / or not technically relevant are included and / or that deviations of up to ±5% are included.

[0118] Above and below, the wording that a feature is provided at least for the most part in an entity, for example that a feature is provided at least for a large part of elements of a total quantity and / or at least for the most part along a length, is to be understood in particular as meaning that the feature is provided in at least half, preferably at least 70% and in particular at least 80%, for example at least 90%, of the entity, i.e. for example the total number and / or the length, and / or that, for example, the feature is provided at least substantially in the entity, i.e. in particular within technically determined and / or technically irrelevant tolerances.Above and below, elements and features which are described as being provided for example and / or in particular and / or preferably and / or advantageously and / or preferably and / or in variants and / or the like are optional features which, for example, represent inventive developments but are in particular not absolutely necessary for the success of the basic inventive solution.

[0119] Preferred embodiments and features of the invention and, for example, advantages thereof are the subject of the following detailed description and the drawing of an embodiment in different variants.

[0120] The drawing shows:

[0121] Fig. 1 is an exploded view of an embodiment of a sealing system comprising two pipe end pieces and a sealing body sealing radially between the two pipe end pieces;

[0122] Fig. 2 is a (radial) sectional view of the embodiment in an assembled state;

[0123] Fig. 3 a partially enlarged view of the (radial) sectional view for different variants;

[0124] Fig. 4 a (radial) sectional view of the sealing body for different variants;

[0125] Fig. 5 Process steps and intermediate products in the manufacture of the sealing body.

[0126] An embodiment of a sealing system designated as a whole by 100 comprises two pipe elements with a respective pipe end piece 112, 114 and a sealing body 120 as a sealing element for radial sealing between the two pipe end pieces 112, 114. The embodiment of the sealing system 100 is shown by way of example in Figs. 1 to 4.

[0127] For example, the pipe elements with their respective pipe end pieces 112, 114 are components of an exhaust system.

[0128] For example, a combustion engine includes the exhaust system. In particular, a motor vehicle includes the exhaust system.

[0129] In the sealing system 100, a sealing axis 122 is defined.

[0130] In principle, any reference above and below to a direction of rotation and / or an axial direction and / or radial direction and / or an axial orientation and / or a radial orientation is to be understood as a reference with respect to the seal axis 122, unless explicitly stated otherwise and / or unless an explicit other reference is obvious from the context.

[0131] Each of the two pipe end pieces 112, 114 comprises a respective pipe wall 126, 128. The two pipe walls 126, 128 each extend in a circumferential direction 134 around the sealing axis 122 and extend in an axial direction 136 of the sealing axis 122 and are spaced from the sealing axis 122 in a radial direction 138 of the sealing axis 122.

[0132] Conveniently, the respective pipe wall 126, 128 of the two pipe end pieces 112, 114 has a respective radially inwardly directed wall inner side 142 (of the pipe end piece 112) and wall inner side 144 (of the pipe end piece 114) and a respective radially outwardly directed wall outer side 146 (of the pipe end piece 112) and wall outer side 148 (of the pipe end piece 114). In particular, the wall inner sides 142, 144 of the two pipe end pieces 112, 114 have a respective wall inner surface 143 (of the pipe end piece 112) and wall inner surface 145 (of the pipe end piece 114). In particular, the wall outer sides 146, 148 of the two pipe end pieces 112, 114 have a respective wall outer surface 147 (of the pipe end piece 112) and wall outer surface 149 (of the pipe end piece 114).

[0133] In particular, the two pipe end pieces 112, 114 have a respective pipe inner radius 152 (of the pipe end piece 112) and pipe inner radius 154 (of the pipe end piece 114) and a respective pipe outer radius 156 (of the pipe end piece 112) and pipe outer radius 158 (of the pipe end piece 114).

[0134] In particular, the respective pipe inner radius 152, 154 is measured in the radial direction 138 of the seal axis 122 from the seal axis 122 to the respective wall inner side 142, 144, in particular to the respective wall inner surface 143, 145. In particular, the respective pipe outer radius 156, 158 is measured in the radial direction 138 of the seal axis 122 from the seal axis 122 to the respective wall outer side 146, 148, in particular to the respective wall outer surface 147, 149.

[0135] In particular, one of the two pipe end pieces 112, 114, here for example the pipe end piece 112, is a radially larger pipe end piece 112 with respect to the radial dimensions compared to the other of the two pipe end pieces 114, 112, here for example compared to the radially smaller pipe end piece 114.

[0136] In particular, in the case of the radially larger pipe end piece 112, its inner pipe radius 152 is larger than the outer pipe radius 158 of the radially smaller pipe end piece 114. For example, the radially larger pipe end piece 112 has a chamfer 162 at its pipe end on the inner wall side 142.

[0137] For example, the radially smaller pipe end piece 114 has a chamfer 168 at its pipe end on the outer wall side 148.

[0138] In an assembled state of the sealing system 100, the radially smaller pipe end piece 114 projects at least in an overlap region 172 into the radially larger pipe end piece 112, in particular into a pipe interior 174 of the radially larger pipe end piece 112.

[0139] In particular, the pipe interior 174 of the pipe end piece 112 is delimited in the radial direction 138 of the sealing axis 122 by the wall inner side 142 of the pipe end piece 112 and the pipe interior 174 extends in the axial direction 136 of the sealing axis 122.

[0140] Advantageously, in the overlap region 172, at least one inner section 182 of the wall inner side 142 (and in particular of the wall inner surface 143) and one outer section 188 of the wall outer side 148 (and in particular of the wall outer surface 149) of the radially smaller pipe end piece 114 face each other in the radial direction 138 of the sealing axis 122.

[0141] A gap 194 is formed between the inner section 182 of one (in particular radially larger) pipe end piece 112 and the outer section 188 of the other (in particular radially smaller) pipe end piece 114.

[0142] In particular, the gap 194 opens at one (in particular axial) gap end 196 into an environment 197 of the pipe end pieces 112, 114 and at another (in particular axial) gap end 198 into a region of the pipe interior 174, in particular into a region of the pipe interior 174 located outside the overlap region 172. In particular, the sealing body 120 is arranged in the gap 194 in the assembled state of the sealing system 100 and seals between the inner section 182 of one (in particular radially larger) pipe end piece 112 and the outer section 188 of the other (in particular radially smaller) pipe end piece 114.

[0143] In particular, the sealing body is made of a metallic material.

[0144] Advantageously, the sealing body 120 is at least partially flexible in the radial direction 138 of the sealing axis 122.

[0145] For example, the sealing body 120 is at least partially flexible in the axial direction 136 of the sealing axis 122.

[0146] The sealing body 120 extends in the circumferential direction 134 in a closed manner around the sealing axis 122. In particular, at least in this sense, the sealing body 120 is an annular body.

[0147] The sealing body 120 has an axial extension 216 in the axial direction 136 of the sealing axis 122 and a radial extension 218 in the radial direction 138.

[0148] In particular, the axial extension 216 of the seal body 120 is measured in the axial direction 136 of the seal axis 122 between two axially opposite edge portions of the seal body 120. In particular, these two axial edge portions are those portions of the seal body 120 that are axially farthest apart.

[0149] In particular, the radial extension 218 of the sealing body 120 is measured in the radial direction 138 of the sealing axis 122 between two radially opposite edge portions of the sealing body 120. In particular, these two radial edge portions are those portions of the sealing body 120 that are radially farthest apart.

[0150] In particular, the sealing body 120 has a material thickness 222. In particular, the material thickness 222 is smaller and in particular much smaller, for example at least five times smaller, advantageously at least ten times smaller, than the axial extent 216 and / or the radial extent 218 of the sealing body 120.

[0151] Conveniently, an expansion region of the sealing body 120 is largely a free space region, wherein the expansion region of the sealing body 120 is spanned by the axial extension 216 and the radial extension 218 of the sealing body 120. In particular, the expansion region of the sealing body 120 is largely a free space, since the material of the sealing body 120 has a (in particular much) smaller material thickness 222.

[0152] The material thickness 222 is measured in a thickness direction 224.

[0153] In particular, the sealing body 120 is an at least partially curved and, for example, complexly shaped body, so that the thickness direction 224 is aligned differently in different sections of the sealing body 120.

[0154] In particular, the material thickness 222 is measured transversely to the extension of the sealing body 120 in the circumferential direction 134 and advantageously in a radial cross-section. In particular, the material thickness 222 is measured in the radial cross-section transversely and in particular at least approximately perpendicularly to an extension of a respective section of the sealing body 120. By way of example, the respective thickness directions 224' and 224" of the sections are shown in Fig. 4 for two different sections of the sealing body 120. In the foregoing and hereinafter, a radial cross-section is understood to mean that a sectional plane of the radial cross-section extends from the sealing axis 122 in the radial direction 138. In particular, the sectional plane of the radial cross-section thus extends transversely and in particular at least approximately perpendicularly to the circumferential direction 134 of the sealing axis 122.

[0155] In particular, the material thickness 222 of the sealing body 120 is selected and designed such that desired shape-flexible and / or elastic properties and / or deformation properties of the sealing body 120 are achieved.

[0156] In particular, the sealing body 120 has a radial curvature 232, wherein the sealing body 120 is advantageously curved in the radial direction of the sealing axis 122 at the radial curvature 232.

[0157] In some advantageous variants, the sealing body 120 is curved radially outward at the radial curvature 232. An example of a variant with a radially outwardly curved radial curvature 232 is shown in Figs. 1 and 2.

[0158] In some favorable variants, the radial curvature 232 of the sealing body 120 is curved radially inwards.

[0159] The illustrations in Figs. 3 and 4 are examples both for variants with a radially outwardly curved radial curvature 232 and for variants with a radially inwardly curved radial curvature 232, wherein the reference numerals in front of a bracket refer to variants with a radially outwardly curved curvature 232, and reference numerals in a bracket refer to variants with a radially inwardly curved curvature 232, provided that the reference numerals for these different variants are different. The illustrations in Figs. 1 and 2 are intended, with appropriate adaptation, to also be examples for variants with a radially inwardly curved radial curvature 232.

[0160] In particular, the radial bulge 232 has a bulge head portion 236 and two bulge leg portions 238I, II.

[0161] In particular, the radial curvature 232 is configured to be self-contained, extending in the circumferential direction 134 around the sealing axis 122. In particular, the curvature head section 236 and the two curvature leg sections 238I, II are each configured to be self-contained, extending in the circumferential direction 134 around the sealing axis 122.

[0162] Conveniently, one bulge leg portion 238I (of the two bulge leg portions 238) is integrally formed on the bulge head portion 236 at a tip end portion 242I of the bulge head portion 236, and the other bulge leg portion 238II is integrally formed on another tip end portion 242II of the bulge head portion 236. In particular, the two tip end portions 242 are arranged on the same radial side of the bulge head portion 236.

[0163] In particular, the curved head section 236 has at least approximately an arcuate shape transversely to its extension (extension in the circumferential direction 134) and in particular in a radial cross-section. For example, the arcuate shape extends from one head end region 242I (of the two head end regions 242) of the curved head section 236 to the other head end region 242II of the curved head section 236.

[0164] Conveniently, the two bulge leg sections 238 each extend from the bulge head section 236, specifically obliquely to the axial direction 136 and obliquely to the radial direction 138 from the bulge head section 236. In particular, an oblique extension of a bulge leg section 238 (to the axial direction 136 and / or radial direction 138 of the seal axis 122) is related to its extension in a radial cross-section.

[0165] In particular, the two arch leg sections 238 extend obliquely from the arch head section 236 such that an axial spacing of the two arch leg sections 2381, 11 from one another increases with increasing extension from the arch head section 236.

[0166] In particular, the at least partially flexible design of the sealing body 120 is at least partially achieved by the radial curvature 232 of the sealing body 120.

[0167] In particular, the radial curvature 232 is designed to be at least partially flexible, in particular at least partially dimensionally flexible and / or at least partially elastically flexible. In particular, upon flexible deformation of the curvature 232, an extent of the curvature 232 changes. In particular, upon flexible deformation of the sealing body 120, an opening angle at which the two curvature leg sections 238I, II extend away from each other changes.

[0168] In particular, the sealing body 120 has two end sections 252I, II. Advantageously, the two end sections 252I, II are each formed as a closed section extending in the circumferential direction 134 around the sealing axis 122.

[0169] In particular, the sealing body 120 is shaped from one of the two end sections 252I, II to the other of the two end sections 252L, II, in particular transverse to the course (course in the circumferential direction 134) of the sealing body 218.

[0170] In particular, the sealing body 120 is shaped in a radial cross-section along a shaped curve 256 from one end section 252I, II (of the two end sections 252) to the other of the two end sections 252L, II. In particular, the shaped curve 256 is curved at least in sections, at least in the region of the radial curvature 232. In particular, the curvature head section 236 is curved along its extension along a section of the shaped curve 256. In particular, the curvature leg sections 238 each extend along a respective section of the shaped curve 256.

[0171] In particular, the thickness direction 224 runs transversely and in particular at least approximately perpendicular to the shape curve 256 and accordingly the material thickness 222 is measured transversely and in particular at least approximately perpendicular to the shape curve 256.

[0172] Advantageously, a material thickness 222 of the sealing body 120 is at least approximately constant along the shape curve 256.

[0173] In particular, each of the two end sections 2521, 11 has a respective free end 2621, 11 and a molding area 2641, 11.

[0174] In particular, the respective free end 262I, II and / or the respective molding region 264I, II of the two end sections 252 extend, in particular closed, in the circumferential direction 134 around the sealing axis 122.

[0175] In particular, the respective end section 252 is shaped, in particular transversely to its course in the circumferential direction 134 and / or along the shape curve 256, from its respective free end 2621, 11 to its respective forming region 264I, II.

[0176] In particular, an extension of the sealing body 120 ends at the respective free end 262I, II of the two end sections 252I, II. In particular, no further section of the sealing body 120 is formed on the respective free end 262I, II of the two end sections 252I, II. Advantageously, the two end sections 252I, II of the sealing body are the two axially opposite edge sections of the sealing body 120. In particular, the free ends 262I, II of the two end sections 252I, II are axially furthest apart in the sealing body 120 in the axial direction 136 of the sealing axis 122.

[0177] In particular, a further section of the sealing body 120 is integrally formed in the respective forming region 264I, II at the respective end section 252IJI. Conveniently, a respective curvature leg section 238I, II is arranged at a respective end section 252I, II. Preferably (in some variants), a respective curvature leg section 238I, II is integrally formed in a respective forming region 264I, II at a respective end section 252I, II. For example, (in some variants), a respective curvature head section 236IJI is arranged indirectly at the respective end section 252I, II, specifically via at least one further section of the sealing body 120, wherein in particular the respective at least one further section is integrally formed in the respective forming region 264IJI at the respective end section 252I, II.

[0178] In particular, a respective end portion 252IJI on the one hand and the bulge head portion 236 on the other hand are the two radially opposite edge portions of the sealing body 120.

[0179] Advantageously, at least one of the two end sections 252I, II and preferably both of the two end sections 252I, II are curved transversely to their course (the course in the circumferential direction 134). In particular, the shaped curve 256 is curved in the region of the curved end section 252I, II. In particular, the curved end section 252I, II has a curved extension from its free end 262I, II to its forming region 264I, II. In particular, at least one of the two end sections 252I, II and preferably both of the two end sections 252I, II are designed and in particular curved such that the respective free end 262I, II of the corresponding end section 252I, II is located axially further outward than the forming region 264I, II of the corresponding end section 252I, II.

[0180] In particular, the sealing body 120 has a first radial side 272 and a second radial side 274, wherein the first radial side 272 and the second radial side 274 are oppositely oriented radial sides of the sealing body 120 in the radial direction 138 of the sealing axis 122.

[0181] In particular, the bulge head portion 236 is formed on the first radial side 272 and is configured such that the bulge head portion 236 forms a convexly curved radial edge surface 282 of the seal body 120.

[0182] In particular, an opposite surface 283 of the bulge head portion 236 is concavely curved, the opposite surface 283 being a surface of the bulge head portion 236 opposite the radial edge surface 282 in the thickness direction 224.

[0183] In particular, the radial edge surface 282 of the sealing body 120 (and in particular of the domed head section 236) extends, in particular in a closed manner, around the sealing axis 122 in the circumferential direction 134. In particular, the radial edge surface 282 is curved transversely to its extension (extension in the circumferential direction 134), advantageously convex.

[0184] In particular, the two end portions 252l,ll are formed on the second radial side 274.

[0185] Conveniently, at least one of the two end sections 252I, II and preferably both of the two end sections 252L, II are each curved in such a way that it / these form / form a (respective) convexly curved radial edge surface 284I, II on the second radial side 274.

[0186] Advantageously, at least one of the two end sections 252I, II and preferably both of the two end sections 252I, II are each curved such that its free end 262I, II (the respective free end 262I, II) is arranged radially set back on the radial side 274 and in particular is arranged radially set back from the (respective) radial edge surface 284I, II.

[0187] In particular, a (respective) opposite surface 285l,ll of the (corresponding) curved end portion 252I,II is concavely curved, wherein the (respective) opposite surface 285l,ll is a surface of the (respective) end portion 252I,II opposite to the radial edge surface 284I,II in the thickness direction 224.

[0188] In particular, the (respective) radial edge surface 284I, II of the sealing body 120 extends on the second radial side 274, in particular (respectively) in a closed manner, in the circumferential direction 134 around the sealing axis 122. In particular, the (respective) radial edge surface 284I, II is curved, advantageously convexly curved, to its extent (extension in the circumferential direction 134).

[0189] In particular, the radial extension 218 of the sealing body 120 corresponds to the radial spacing of the radial edge surface 282 on the first radial side 272 on the one hand and the radial edge surfaces 284I, II on the second radial side 274 on the other hand.

[0190] In particular, in the case of a radially outwardly curved radial bulge 232, the first radial side 272 (with the bulge head portion 236) is a radial outer side 286 of the sealing body 120 and the second radial side 274 (in particular with the end portions 252I, II) is a radial inner side 288 of the sealing body 120.

[0191] In particular, in the case of a radially inwardly curved radial curvature 232, the first radial side 272 (with the curvature head portion 236) is a radial inner side 288 of the sealing body 120 and the second radial side 274 (in particular with the end portions 252I, II) is a radial outer side 286 of the sealing body 120.

[0192] In particular, the sealing body 120 has a cavity 292, wherein the cavity 292 is partially enclosed by the sealing body 120.

[0193] In particular, the cavity 292, advantageously closed in itself, extends in the circumferential direction 134 around the sealing axis 122.

[0194] In particular, the cavity 292 is formed in the region of the radial curvature 232.

[0195] In particular, the cavity 292 is enclosed by the seal body 120 on one side in the radial direction 138 of the seal axis 122. Conveniently, the cavity 292 is delimited on the first radial side 272 by the bulge head portion 236 of the seal body 120.

[0196] Conveniently, the cavity 292 is at least largely enclosed by the sealing body 120 in the axial direction 136 of the sealing axis 122. In particular, on a respective axial side, a respective curved leg section 238l,ll (of the two curved leg sections 238) delimits the cavity 292 in the axial direction.

[0197] In particular, the cavity 292 is configured to open toward one side in the radial direction 138 of the seal axis 122, in particular on the second radial side 274. In particular, the cavity 292 is axially bounded by the two end sections 252I, II on the second radial side, where it is configured to open radially.

[0198] In particular, the sealing body 120 comprises at least one first radially aligned sealing surface 312 and at least one second radially aligned sealing surface 314. The at least one first sealing surface 312, on the one hand, and the at least one second sealing surface 314, on the other hand, are sealing surfaces of the sealing body 120 that are radially opposite to one another.

[0199] In particular, the at least one first sealing surface 312 and the at least one second sealing surface 314 each extend in a closed manner in the circumferential direction 134 around the sealing axis 122.

[0200] In particular, the at least one first sealing surface 312 is formed on the first radial side 272 of the sealing body 120. In variants in which the first radial side 272 is the radial outer side 286, the at least one first sealing surface 312 is a radially outwardly directed sealing surface 316. In variants in which the first radial side 272 is the radial inner side 288, the at least one first sealing surface 312 is a radially inwardly directed sealing surface 318.

[0201] In particular, the at least one second sealing surface 314 and, for example, two second sealing surfaces 3141,11 are formed on the second radial side 274 of the sealing body 120. In variants in which the second radial side 274 is the radial inner side 288, the at least one second sealing surface 314 is a radially inwardly directed sealing surface 318 (and the two second sealing surfaces 3141,11 are two radially inwardly directed sealing surfaces 3181,11). In variants in which the second radial side 274 is the radial outer side 286, the at least one second sealing surface 314 is a radially outwardly directed sealing surface 316 (and the two second sealing surfaces 3141,11 are two radially outwardly directed sealing surfaces 3161,11). In particular, the at least one first sealing surface 312 is curved transversely to its extension (extension in the circumferential direction 134). Advantageously, the at least one first sealing surface 312 is a convexly curved surface.

[0202] Advantageously, the at least one second sealing surface 314 is curved transversely to its extension (extension in the circumferential direction 134), and in particular, the two second sealing surfaces 3141, 11 are each curved transversely to their respective extension (extension in the circumferential direction 134). Advantageously, the at least one second sealing surface 314 is a convexly curved surface. In particular, the two second sealing surfaces 3141, 11 are each a convexly curved surface.

[0203] In particular, the radial edge surface 282 at the radial curvature 232 (and in particular the radial edge surface 282 of the curvature head portion 236) forms the (at least one) first sealing surface 312.

[0204] Conveniently, at least one radial edge surface 284 of the sealing body 120 on the second radial side 274 forms the at least one second sealing surface 314. In particular, a respective radial edge surface 284I, II of the sealing body 120 on the second radial side 274 forms one of the two second sealing surfaces 3141, 11.

[0205] In particular, at least one end portion 252 of the sealing body 120, in particular with a convexly curved surface, advantageously forms with its radial edge surface 284I, II, the at least one second sealing surface 314. In particular, both of the two end portions 252IJI, in particular with a respective convexly curved surface, in particular with their respective radial edge surface 284IJI, each form one of the two second sealing surfaces 314I, II.

[0206] In particular, the sealing body 120 has one (and in particular exactly one) joint 352. In particular, two sections 356, 358 of the in particular one-piece sealing body 120 are joined together at the joint 352, preferably connected to one another by a material bond.

[0207] In particular, the sealing body 120 extends in one piece from one of the two sections 356 in the circumferential direction 134 around the sealing axis 122 to the other of the two sections 358, 356 and since the two sections 356, 358 are joined together, the sealing body 120 extends in a closed manner in the circumferential direction 134 around the sealing axis 122.

[0208] In particular, the joint 352 extends through the individual sections of the sealing body 120, in particular through the curved head section 236 and the two curved leg sections 238 and / or the two end sections 252I, II. In particular, the joint 352 extends from one of the two end sections 252I, II to the other of the two end sections 252I, II, in particular continuously along the sealing body 120.

[0209] Advantageously, the joint 352 extends in a radial cross-section, in particular continuously along the shape curve 256.

[0210] Advantageously, the two sections 356, 358 are welded together at the joint 352. In particular, the joint 352 comprises at least one weld seam.

[0211] By way of example, method steps and intermediate products of an embodiment of a method for producing a sealing body 120 are shown in Fig. 5. In particular, a method for producing a sealing body 120 and a sealing system 100 comprises providing a strip product 414 in at least one method step 412.

[0212] The strip product 414 extends in a longitudinal direction 416 from one of two longitudinal ends 417, 419 to the other of the two longitudinal ends 417, 419.

[0213] In particular, the strip product 414 has a length 422 in its longitudinal direction 416 and a width 428 in a width direction 426. The length 422 of the strip product 414 is greater, and in particular much greater, for example at least ten times greater, than the width 428 of the strip product 414.

[0214] In particular, the length 422 of the strip product 414 corresponds at least substantially to a typical length of the course of the sealing body 120 to be produced in the circumferential direction 134 around the sealing axis 122, that is to say at least substantially to a typical circumference of the sealing body 120 to be produced, wherein the typical course (to which the typical length and the typical circumference are related) lies within the radial extent 218 of the sealing body 120 to be produced.

[0215] Advantageously, the width 428 of the strip product 414 is selected as a function of the axial extension 216 of the sealing body 120 to be produced, wherein, due to subsequent forming steps, there is no one-to-one correspondence between the width 428 of the strip product 414 and the axial extension 216 of the sealing body 120 to be produced.

[0216] In particular, the strip product 414 has a material thickness that at least substantially corresponds to the material thickness 222 of the sealing body 120 to be produced. The material thickness of the strip product 414 is measured perpendicular to the longitudinal extension direction 416 and the width extension direction 426 of the strip product 414.

[0217] Advantageously, the strip product 414 is manufactured from a flat product 432.

[0218] Preferably, the flat product 432 is a metal flat product, for example a sheet.

[0219] In particular, a respective extension of the flat product 432 in two extension directions 434, 436 is greater, in particular much greater, for example at least ten times greater, than a thickness of the flat product 432, wherein the two extension directions 434, 436 run at least approximately perpendicular to one another and the thickness of the flat product 432 is measured perpendicular to an extension plane of the flat product 432, wherein the extension plane is spanned by the two extension directions 434 and 436.

[0220] In particular, the thickness of the flat product 432 is equal to the material thickness of the strip product 414.

[0221] Advantageously, the strip product 414 is produced from the flat product 432 by separating it along a separating line 442 from a remainder of the flat product 432 and thus provided.

[0222] In some advantageous variants, the flat product 432 has an extension in an extension direction 434 that corresponds to the length 422 of the strip product 414 to be produced. In particular, the strip product 414 is then produced by severing a strip strip having the width 428 of the strip product 414 to be produced from the flat product 432. An example of such a variant is shown in Fig. 5. In some advantageous variants, the flat product 432 has an extension in an extension direction 436 that corresponds to the width 428 of the strip product 414 to be produced. Advantageously, the flat product 432 is then an endless strip. In particular, the strip product 414 is then produced by severing a strip section having the length 422 of the strip product 414 to be produced from the flat product 432. The representation in Fig. 5 (with appropriate adjustments) should also be representative for this variant.

[0223] Advantageously, in at least one method step 452, the strip product 414 is reshaped, in particular curved, around the (intended) sealing axis 122, and the two longitudinal ends 177, 119 are brought toward each other and arranged against each other. Advantageously, an annular body extending around the sealing axis 122 is thus formed, which, however, is still interrupted in its extension in the circumferential direction 134 around the sealing axis 122 in the region of the longitudinal ends 417, 419.

[0224] In particular, in at least one method step 462, the two longitudinal ends 417, 419 of the strip product 414 are joined together, so that a section 356 is joined to one longitudinal end 417 (of the two longitudinal ends) and a section 358 is joined to the other longitudinal end 419 (of the two longitudinal ends), and the resulting ring blank 466 has a joint between the two sections 356, 358 and is designed to be closed in the circumferential direction 134 around the sealing axis 122.

[0225] Advantageously, the two longitudinal ends 417, 419 and thus the two sections 356, 358 are joined together in a materially bonded manner, for example by welding.

[0226] In particular, the ring blank 466 has a thickness 222', which is measured in the radial direction 138 of the (intended) sealing axis 122. In particular, the thickness 222' of the ring blank 466 corresponds at least approximately to the material thickness 222 of the sealing body 120 to be produced. For example, the thickness 222' is further (particularly slightly) reduced to the material thickness 222 of the sealing body 120 during subsequent forming steps, in particular during rolling. In particular, the thickness 222' of the ring blank 466 corresponds to the material thickness of the strip product 414.

[0227] Advantageously, in at least one method step 472, the ring blank 466 is formed into the sealing body 120 to be produced, wherein the sealing body 120 to be produced has at least one feature and advantageously at least one combination of features of the features explained above and / or below in connection with the sealing body 120.

[0228] Advantageously, during the forming 472, the ring blank 466 is at least partially radially curved so that the radial curvature 232 is formed.

[0229] Advantageously, in the molds 472, the end sections 2521, 11 are formed at least partially curved.

[0230] Preferably, the forming 472 of the ring blank 466 into the sealing body 120 is carried out at least partially and advantageously at least largely by a rolling process.

[0231] In particular, during the rolling process, a rolling head of a rolling tool acts on the ring blank 466.

[0232] Advantageously, the rolling head rotates about a rotational axis and acts in a rolling manner on a respective region of the ring blank 466. In particular, the rolling head rolls on the ring blank 466 and thus acts (in time) one after the other (in space, in particular in the direction of rotation 134) on successive regions of the ring blank 466.

[0233] Advantageously, during the forming 472, the rolling head rolls several times along the course (course in the direction of rotation 134) of the ring blank 466 until the sealing body 120 is formed.

[0234] Conveniently, the rolling head acts on a radial side of the ring blank 466. In particular, a counter-mold with a mold recess is arranged on the opposite radial side of the ring blank 466. In particular, the rolling head and the counter-mold (in particular with its mold recess) interact such that the ring blank 466 is formed into the desired shape of the sealing body 120. For example, the mold recess has a shape corresponding, at least in sections, to the desired shape of the sealing body 120.

[0235] In particular, advantageous embodiments and / or functionalities of a sealing system and / or favorable method steps in the production of the sealing system 100 and, for example, advantages thereof are briefly summarized as follows.

[0236] The sealing body 120 of the sealing system 100 has at least one radially outwardly directed sealing surface 316 and at least one radially inwardly directed sealing surface 318 for radial sealing.

[0237] Conveniently, the sealing body 120 has a radial curvature 232. In particular, the radial curvature 232, conveniently a curvature head section 236 of the radial curvature 232, forms a radially oriented (first) sealing surface 312, 316, 318. This sealing surface 312, 316, 318 is advantageously convexly curved. In particular, the sealing body 120 has at least one second sealing surface 314 and conveniently two second sealing surfaces 3141, 311, wherein the at least one second sealing surface 314 and in particular the two second sealing surfaces 3141, 311 are oriented in the radial direction 138 of the sealing axis 122 opposite to the (first) sealing surface 312, 316, 318 on the radial curvature 232.

[0238] Conveniently, the at least one second sealing surface 314 is formed on an end portion 252 of the sealing body 120. In particular, the two second sealing surfaces 3141,11 are formed on a respective end portion 2521,11 of the sealing body 120.

[0239] Preferably, the at least one second sealing surface 314 is convexly curved. In particular, the two second sealing surfaces 3161, 311 are each convexly curved.

[0240] In particular, a cavity 292 is provided in the sealing body 120, wherein the cavity 292 is partially enclosed by sections of the sealing body 120.

[0241] In particular, the cavity 292 is delimited towards a radial side 272 by a portion of the sealing body 220, in particular by the bulge head portion 236.

[0242] In particular, the cavity 292 is designed to be open toward a radial side 274. Advantageously, relative to the axial direction 136 of the sealing axis 122, a (particularly second) sealing surface 3141,11 of the sealing body 120 is arranged on both sides of the region in which the cavity 292 is designed to be open.

[0243] In particular, the sealing body 120 is designed to be at least partially flexible. Advantageously, the radially aligned sealing surfaces 312, 314, 316, 318 provide a seal in the radial direction 138 of the sealing axis 122. Advantageously, the (particularly convex) curved design of the sealing surfaces 312, 314, 316, 318 achieves a particularly reliable and secure seal.

[0244] In particular, the seal becomes less sensitive to manufacturing tolerances due to the advantageously curved sealing surfaces 312, 314, 316, 318.

[0245] Advantageously, the sealing body 120 can be installed under prestress, for example between two pipe end pieces 112, 114, due to its at least partially flexible design, wherein the sealing effect is advantageously improved by the prestress.

[0246] For example, the curved sealing surfaces 312, 314, 316, 318 are advantageous for making it easier to insert the sealing body 120 into a gap 194 in which the sealing body 120 is intended to seal.

[0247] It is advantageous if a pipe end piece 112, 114 has a chamfer 162, 168 at its pipe end on the side 142, 144, 146, 148 against which the sealing body 120 is to sealingly bear. This advantageously facilitates insertion of the sealing body 120 into a gap 194 between the two pipe end pieces 112, 114.

[0248] It is particularly advantageous if the sealing body 120 can be manufactured from a strip product 114 and is advantageously manufactured from a strip product 414. In particular, this allows a loss of raw material to be reduced and advantageously minimized.

[0249] In particular, the sealing body 120 has (in particular precisely) a joint 252 at which two sections 356, 358 of the (in particular one-piece) sealing body 120 are joined together. In particular, one of the two sections 356, 358 forms one of two longitudinal ends 417, 419 of the strip product 414 from which the sealing body 120 is made, and the other of the two longitudinal ends 419, 417 of the strip product 414 is formed on the other of the two sections 358, 356.

[0250] Preferably, the sealing body 120 is formed into its shape, for example, from a ring blank 466. Advantageously, the rolling process can achieve a high internal stress in the material of the sealing body 120 and / or particularly good surface properties for the sealing body 120.

[0251] Advantageously, in the assembled state of the sealing system 100, the sealing body 120 rests with its at least one radially outwardly directed sealing surface 316 against an inner wall side 142 (in particular of a radially larger pipe end piece 112) and with its at least one radially inwardly directed sealing surface 318 against an outer wall side 148 (in particular of a radially smaller pipe end piece 112).

[0252] The wall inner side 142 and the wall outer side 148 face each other and sealing body 120 seals between them.

[0253] List of reference symbols

[0254] 100 sealing system

[0255] 112 (radially larger) pipe end piece

[0256] 114 (radially smaller) pipe end piece

[0257] 120 sealing bodies

[0258] 122 Sealing axis

[0259] 126 pipe wall

[0260] 128 pipe wall

[0261] 134 Direction of rotation

[0262] 136 axial direction

[0263] 138 radial direction

[0264] 142 inside wall

[0265] 143 interior wall surface

[0266] 144 Inside wall

[0267] 145 interior wall surface

[0268] 146 Wall exterior

[0269] 147 External wall surface

[0270] 148 Wall exterior

[0271] 149 External wall surface

[0272] 152 pipe inner radius

[0273] 154 Pipe inner radius

[0274] 156 Pipe outer radius

[0275] 158 Pipe outer radius

[0276] 162 chamfer

[0277] 168 chamfer

[0278] 172 Overlap area

[0279] 174 Pipe interior

[0280] 182 interior section

[0281] 188 Outer section

[0282] 194 gap

[0283] 196 Column end 197 Surroundings

[0284] 198 column end

[0285] 216 axial expansion of the sealing body

[0286] 218 radial expansion of the sealing body

[0287] 222 Material thickness of the sealing body

[0288] 222' thickness of a ring blank

[0289] 224 Thickness direction

[0290] 232 radial curvature

[0291] 236 Vault head section

[0292] 238 camber leg section

[0293] 242 head end area

[0294] 252 final section

[0295] 256 shape curve

[0296] 262 free end (of an end section)

[0297] 264 Forming area (of an end section)

[0298] 272 first radial side of the seal body

[0299] 274 second radial side of the seal body

[0300] 282 radial edge surface (on the first radial side)

[0301] 283 opposite surface

[0302] 284 radial edge surface (on the second radial side)

[0303] 285 opposite surface

[0304] 286 radial outer side

[0305] 288 radial inside

[0306] 292 cavity

[0307] 312 first sealing surface

[0308] 314 second sealing surface

[0309] 316 radially outward-facing sealing surface

[0310] 318 radially inward-facing sealing surface

[0311] 352 joint

[0312] 356 section

[0313] 358 section

[0314] 412 Process step (providing strip product) 414 Strip product

[0315] 416 Longitudinal direction

[0316] 417 Longitudinal end

[0317] 419 Longitudinal end 422 Length

[0318] 426 Width direction

[0319] 428 width

[0320] 432 Flat product

[0321] 434 Expansion direction 436 Expansion direction

[0322] 442 dividing line

[0323] 452 Process step (forming the strip product)

[0324] 462 Process step (joining)

[0325] 466 Ring blank 472 Process step (shaping the sealing body)

Claims

Patent claims 1. Sealing system (100), wherein the sealing system (100) comprises at least one sealing body (120), wherein the sealing body (120) has at least one sealing surface (312, 314, 316) directed radially outwards with respect to a sealing axis (122) and at least one sealing surface (312, 314, 318) directed radially inwards with respect to the sealing axis (122), and wherein the sealing body (120) has a joint (352), wherein two sections (356, 358) of the sealing body (120) are joined to one another at the joint (352).

2. Sealing system (100), in particular according to the preceding claim, wherein the sealing system (100) comprises at least one sealing body (120), wherein the sealing body (120) has at least one sealing surface (312, 314, 316) directed radially outwards with respect to a sealing axis (122) and at least one sealing surface (312, 314, 318) directed radially inwards with respect to the sealing axis (122), and wherein the sealing body (120) is formed into its shape at least partially by rolling.

3. Sealing system (100) according to one of the preceding claims, characterized in that at least one sealing surface (312, 314, 316, 318) of the sealing body (120) is a curved surface, wherein in particular at least one of the following is provided: - that at least one radially inwardly directed sealing surface (312, 314, 318) is a curved surface; and / or - that at least one radially outwardly directed sealing surface (312, 314, 316) is a curved surface; and / or - that at least one curved sealing surface (312, 314, 316, 318) is a convexly curved surface; and / or - that at least one curved sealing surface (312, 314, 316, 318) is curved in a radial cross-section and / or has a bend in a radial cross-section; and / or - that at least one curved sealing surface (312, 314, 316, 318) runs in a circumferential direction (134) of the sealing axis (122) in a closed manner around the sealing axis (122) and the bend of the curved sealing surface (312, 314, 316, 318) is formed transversely to the course in the circumferential direction (134).

4. Sealing system (100) according to one of the preceding claims, characterized in that the sealing body (120) has at least one radial curvature (232).

5. Sealing system (100) according to one of the preceding claims, characterized in that at least one sealing surface (312, 316, 318) of the sealing body (120) is formed on at least one radial curvature (232) of the sealing body (120), wherein in particular a sealing surface (312, 314, 316, 318) of the sealing body (120) is formed at least on one curvature head section (236) of the radial curvature (232).

6. Sealing system (100) according to one of the preceding claims, characterized in that the sealing body (120) has at least one end section (252) and that a sealing surface (312, 314, 316, 318) is formed on at least one end section (252) of the sealing body (120), wherein in particular at least one of the following is provided: - that at least one end section (252) in the circumferential direction (134) of the sealing axis (122) extends in a closed manner around the sealing axis (122); and / or - that at least one end section (252) is arranged on a radial curvature (232) of the sealing body (120), in particular on a Curvature leg portion (238) of the radial curvature (232), and / or - that an axial extension (216) of the sealing body (120) ends at at least one end section (252) of the sealing body (252) and in particular that the axial extension of the sealing body (120) ends axially at each of the at least two end sections (252) of the sealing body (120).

7. Sealing system (100) according to one of the preceding claims, characterized in that at least one end section (252) of the sealing body (120) is a curved section of the sealing body (120) and in particular a curved sealing surface (314, 316, 318) is formed on the curved end section (252).

8. Sealing system (100) according to one of the preceding claims, characterized in that at least one cavity (292) is formed in the sealing body (120) and the cavity (292) is at least partially enclosed by the sealing body (120), wherein in particular at least one of the following is provided: - that the cavity (292) is formed at the radial curvature (232) of the sealing body (120); and / or - that the cavity (292) is open towards a radial side (272, 274).

9. Sealing system (100) according to one of the preceding claims, characterized in that the sealing body (120) has at least two sealing surfaces (312, 314, 316, 318) in at least one radial orientation.

10. Sealing system (100) according to one of the preceding claims, characterized in that the sealing body (120) has a sealing surface (314, 316, 318) at each of two end sections (252) and the sealing surfaces (314, 316, 318) at the two end sections (252) are radially aligned in the same way.

11. Sealing system (100) according to one of the preceding claims, characterized in that the sealing body (120) is formed from a metallic material.

12. Sealing system (100) according to one of the preceding claims, characterized in that at the joint (352) the two parts (356, 358) of the sealing body are integrally connected to one another, in particular welded to one another.

13. Sealing system (100) according to one of the preceding claims, characterized in that the sealing system (100) comprises at least two pipe end pieces (112, 114), wherein the sealing body (120) seals in the radial direction (138) of the sealing axis (122) between the two pipe end pieces (112, 114).

14. Sealing system (100) according to one of the preceding claims, characterized in that the sealing system (100) is designed for a hot gas application and / or for a combustion device.

15. Exhaust system, in particular for a combustion device and / or for a motor vehicle, comprising a sealing system (100) according to one of the preceding claims.

16. A method for producing a sealing system (100), in particular for producing a sealing system (100) according to one of the preceding claims directed to a sealing system, wherein the method comprises at least the following method steps: - providing (412) a strip product (414); and - forming (452) the strip product (414) and joining (462) the strip product (414) to form a ring blank (466); and - forming (472) the ring blank (466) into a sealing body (120), wherein the forming (472) comprises at least the formation of at least one sealing surface (312, 314, 318) directed radially inward with respect to a sealing axis (122) and at least one sealing surface (312, 314, 316) directed radially outward with respect to the sealing axis (122).

17. Method, in particular method according to the preceding claim, for producing a sealing system (100), in particular for producing a sealing system (100) according to one of the preceding claims directed to a sealing system, wherein the method comprises at least one shaping (472) of a ring blank (466) to form a sealing body (120), wherein the shaping (472) is carried out at least partially by rolling and wherein the shaping (472) comprises at least the formation of at least one sealing surface (312, 314, 318) directed radially inward with respect to a sealing axis (122) and at least one sealing surface (312, 314, 316) directed radially outward with respect to the sealing axis (122).

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