Sealing system

Patent metadata

Field	Value
Publication number	US-9897038-B2
Application number	US-201414392112-A
Country	US
Kind code	B2
Filing date	Jun 5, 2014
Priority date	Jun 7, 2013
Publication date	Feb 20, 2018
Grant date	Feb 20, 2018

Abstract

The invention relates to a sealing system consisting of a first part and a second part and at least a passage opening extending in both parts, in particular a passage opening for fluids such as hot combustion gases from combustion engines as well as a corresponding metallic flat gasket such that the sealing system comprises or consists of a first part and a second part with the first part and the second part being compressed against each other at a joint contact surface and comprising at least one passage opening in the contact surface, which protrudes into the first and/or second part, an annular groove, which is delimited by the first and the second part and which encircles the passage opening, with the first and second part in the area at least radially outside of the groove come to rest one on the other.

First claim

The invention claimed is:

1. A sealing system comprising:
a first part and a second part, the first part having a first surface facing the second part and the second part having a second surface facing the first part, wherein, in contact with one another, the first surface and the second surface define a joint contact surface, wherein the first and second parts comprise
at least one passage opening in the joint contact surface, wherein the at least one passage opening protrudes into at least one of the first and second parts,
an annular groove, which is delimited by the first part and the second part and which encircles the passage opening, with the first part and second part in an area at least radially outside of the groove come to rest one on the other at the joint contact surface, wherein
a metallic gasket, which extends annularly in the groove, with the metallic gasket comprising at least one metallic layer, said layer in a projection into a plane parallel to the joint contact surface of the first part and the second part show only one layer, and the metallic flat gasket in the radial direction sequentially comprises from the passage opening an inner circumferential edge, an inner edge area, a central area, an outer edge area, and an outer circumferential edge, wherein said inner circumferential edge faces the passage opening, and said outer circumferential edge faces away from the passage opening, wherein each area and edge is connected by a kinking area, wherein said inner edge area and the outer edge area are not bent, straight areas in contact with either a head of the groove or an opposite, but parallel, ground of the groove, said inner and outer edge areas are both parallel to the head and the ground of the groove.

2. The sealing system according to claim 1 , wherein the inner edge area at its outer edge comprises an inner terminal area, which is not bent in the radial direction and which passes over into the first inner area via a kinking area, where in a non-compressed state of the parts, the inner terminal area rests essentially facially against the head of the groove or the ground of the groove and/or
the outer edge area at its outer edge comprises an outer terminal area, which is not bent in the radial direction and which passes over into the first outer area via a kinking area, where in the non-compressed state of the parts, the outer terminal area rests essentially facially against the head of the groove or the ground of the groove.

3. The sealing system according to claim 2 , wherein the metallic flat gasket comprises no section which extends orthogonally to the contact surface of the first and the second part.

4. The sealing system according to claim 3 , wherein the metallic flat gasket in the non-compressed state of the parts in a projection into the contact surface of the first and the second part comprises a radial extension, which is smaller than the radial extension of the groove and in the fully compressed state of the parts in a projection into the contact surface of the first and the second part comprises a radial extension which is larger than its radial extension in the non-compressed state.

5. The sealing system according to claim 4 , wherein the flat gasket shows at least one of the following properties:
the relationship between the height of the flat gasket and the width of the flat gasket in the non-compressed state is ≦1.2 and/or
the flat gasket in the non-compressed state shows a height, which is larger than the effective height of the groove (Hg) by at least 500 μm; and/or
the radial extension of the flat gasket in the non-compressed state of the parts in projection into the plane of the contact surface ranges between 2 and 5 mm; and/or
it is axially symmetric relative to its outer shape and/or comprises no radial slits.

6. The sealing system according to claim 5 , wherein the central area at least in sections comprises an inclination or descent where
the maximum slope of the central area, relative to the contact surface between the two parts in the non-compressed state or in a compressed state ranges between 80° and 85° and/or
the slope of the central area relative to the two adjacent edge areas in the non-compressed state shows different angles of slope.

7. The sealing system according to claim 6 , wherein the flat gasket at its inner and/or outer edge comprises at least two inserting devices comprised of at least two lugs, with the inserting devices comprising straight lateral edges or at least one angled lateral projection pointing towards the central area of the gasket.

8. The sealing system according to claim 7 , wherein the flat gasket comprises at least two layers where
the radial extension of two adjacent layers is essentially parallel to each other or
the radial course of two adjacent layers is symmetric relative to a central plane between the two layers; and/or
the two layers at their inner edge areas contact each other and/or are connected to each other and/or
at least two of the layers are comprised of different materials, with different thermal expansion coefficient, are facially connected to each other by roll threading.

9. The sealing system according to claim 1 , wherein the flat gasket is exactly one layer.

10. The sealing system according to claim 1 , wherein the flat gasket in its entirety or one of its layers comprises a steel, or a nickel-based alloy.

11. The sealing system according to claim 1 , wherein the head of the groove and/or the ground of the groove only comprise such surface which extend parallel to the plane of the adjacent areas of the contact surface and/or comprise no steps.

12. The sealing system according to claim 11 , wherein a radial cross-section of the groove and a radial cross-section of the flat gasket and/or one of its layers, respectively, comprises no aligned radial extension but a diverging radial extension.

13. The sealing system according to claim 11 , wherein the groove has
a width Bg with 3.3 mm≦Bg≦5.3 mm; and/or
a height Hg with 2 mm≦Hg≦2.6 mm; and/or
an inner diameter of its inner edge Di with preferably Di≧45 mm; and/or
lateral walls between the head of the groove and the ground of the groove which extend orthogonally to the plane of the adjacent areas of the contact surface.

14. The sealing system according to claim 1 , wherein the passage opening is a fluid passage opening for combustion gases of combustion engines or a passage opening for the passage of a shaft.

15. The sealing system according to claim 1 , wherein said inner edge area and said outer edge area, in a compressed state, are parallel but non-planar with one another.

16. The sealing system according to claim 1 , wherein the annular groove is separated from the passage opening by a portion of the contact area.

Assignees

• Reinz Dichtungs Gmbh

Inventors

• Claus Oliver
• Erthle Steffen
• Hoehe Kurt
• Oruc Ahmet
• Waldvogel Hans

Classifications

• F16J15/0887 Primary

  the sealing effect being obtained by elastic deformation of the packing · CPC title

• F02F11/002 Primary

  involving cylinder heads · CPC title

• F16J15/0818

  Flat gaskets · CPC title

• F16J15/0806

  characterised by material or surface treatment · CPC title