JPS622188B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to seal members used in joining assemblies exposed to high temperatures, such as exhaust turbocharge flanges.

In applications with such severe usage conditions,
Since sealing performance cannot be maintained when a general sealing material is used alone, it is known to use a sealing member in which the sealing material is wrapped in a metal jacket, that is, a hollow ring-shaped metal jacket is filled with a filler. be. However, in commonly used sealing members of this type, the airtightness of the joints of the metal jackets is poor, and there is a risk that the filler material may come into contact with the outside air through the gaps in the metal jackets.

Therefore, if such a "C-ring" is used in a place exposed to high temperatures, such as the exhaust turbo charge flange mentioned above, the filler material may penetrate through the gap in the metal jacket under high temperature conditions. In such cases, depending on the material of the filler used, the quality of the filler may deteriorate due to oxidation, etc., resulting in a decrease in sealing performance. Become.

In this case, if you use a filler with extremely high heat resistance that does not deteriorate due to oxidation even at high temperatures, the selection of the filler will not only have the elastic recovery properties required of the sealing member, but also the heat resistance constraints. Therefore, there are problems in that the fillers that can be selected are limited, and it is difficult to impart a predetermined elastic recovery characteristic to the sealing member.

Furthermore, all-metal seals, such as a single metal ring, cannot be used in such applications because they lack the inherent restoring properties of metals and cannot follow the deformation of the assembly caused by heat.

The sealing member according to the present invention has a configuration that can eliminate the above-mentioned disadvantages, and includes a filling material and a metal jacket that is in the shape of a hollow ring surrounding the filling material and has seams at both ends along the circumferential direction of the ring, Furthermore, the structure is characterized in that the metal jackets are made double or triple, and the joints at both ends of each jacket are shifted from each other.

The present invention will be explained below with reference to the drawings.

FIG. 1 shows a cross-sectional view of an embodiment of the invention.

In FIG. 1, 1 is a filler. 2 is the first
The metal jacket 3 is a second metal jacket, both of which are hollow ring-shaped and have seams at both ends along the circumferential direction. The filler 1 is surrounded by the first metal jacket 2, and the jacket 2 is surrounded by the second jacket 3.
1 and 31 are shifted from each other.

FIG. 2 shows another embodiment of the present invention, in which the filler 1 is surrounded by three jackets 2, 3, and 4, and the joints 21, 31, and 41 of the adjacent jackets are offset from each other. , the jackets are fitted together by the elasticity of the jackets themselves.

This sealing member is used to seal connections that are subject to high temperature stress, such as exhaust turbo charge flanges or joints that require excellent chemical resistance at high temperatures.The inner diameter of the connecting flange is approximately φ.
The height of the seal member is approximately 3.5 mm while the outer diameter is approximately 51.9 mm. The total thickness of the metal jacket is preferably 0.5 mm in such a way that it is not mechanically damaged during or before use and guarantees the desired recovery properties. As fillers it is possible to use elastic or plastic materials, preferably graphite, asbestos, clays, especially kaolin or mixtures thereof. The ring shape of the sealing member is usually an annular ring shape, but it can also be an endless ring shape similar to this.

The sealing member according to the present invention has the above-mentioned structure, and has double or triple metal jackets covering the filler material, and the joints at both ends of each metal jacket are staggered from each other, so that the filler material is protected from the outside air. Can be shut off reliably. Therefore, even though the filler is exposed to high temperatures due to heat transfer from the sealing surface and the medium to be sealed, the filler does not come into contact with the medium to be sealed or the atmosphere. Even materials such as graphite, which are easily deteriorated by oxidation or the like at high temperatures, can be used as fillers.

Therefore, according to the present invention, it is possible to prevent deterioration in sealing performance due to deterioration of the filler, and to select the filler without considering deterioration due to contact between the filler and the medium to be sealed or the atmosphere, so that A seal member having predetermined restoration characteristics can be easily obtained.

[Brief explanation of the drawing]

FIG. 1 and FIG. 2 are explanatory diagrams each showing an example of a sealing member according to the present invention. In the figure, 1 is a filler, 2 is a metal jacket, 2a and 2b are both ends of the metal jacket, 3 is a metal jacket, and 3a and 3b are both ends of the metal jacket.

Claims (1)

[Claims] 1. A filler and a hollow ring surrounding the filler,
and a metal jacket having joints at both ends along the circumferential direction of the ring, and further comprising a double or triple layer of metal jackets and staggered joints at both ends of each jacket. 2. The sealing member according to claim 1, wherein the filler is graphite, asbestos, clay, or a mixture thereof.