DE8415125U1 - Conical grooved sealing ring for flange connections - Google Patents

Description

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Conical grooved sealing ring for flange connections

Comb-profiled rings are among the best types of seals that have been developed to date for flange connections etc. They combine the good mechanical and physical properties of specially profiled all-metal seals such as lens seals or ring-joint seals with the advantages and low cost of flat seals that do not require special and expensive flanges.

These seals consist of a metallic, comb-profiled core and soft material ring supports, which are pressed into the "comb valleys" during installation and concentrate a very high sealing pressure on themselves above the combs. However, they can also be used without soft material supports under certain conditions.

Like all other flat gaskets, when the external screws are tightened, the load on the inner diameter of the rings is reduced by the bending of the flange blades and the load on the outer diameter is increased, which reduces the active sealing surface and leads to a highly uneven distribution of the sealing pressure. In order to eliminate this disadvantage, which is unavoidable for sealing connections of the same type, or at least to reduce its effect on the sealing quality, rings of this type with a spherical surface or with a spherical comb base were introduced in accordance with DE-PS 27 56 351. Apart from the high technological effort and the correspondingly higher price compared to cylindrical rings, the inner part of such spherical rings remains

Reinzstrasse 3-7 j)

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relieved of load and thus ineffective. The patent idea of DE-PS 27 56 351 therefore fails to achieve its original purpose and goal - the active area is not kept anywhere near constant and the sealing pressure is not kept uniform across the ring width.

The object of the present invention is therefore to produce these rings using simple turning methods and to avoid the disadvantages mentioned above. This goal is achieved by a simple conical design of both active surfaces, with the greatest thickness (2) of the comb-profiled element (1) being at the inner diameter and the smallest at the outer diameter, or - in other words - the conical inclination running from the inside to the outside. The "valley floor" is parallel to the comb line, ie the comb height is constant across the entire width.

In a second design, the two surfaces remain cylindrically parallel to each other and the "valley bottom" (3) touches a conical surface with the inclination 06 from the inside to the outside, so that a different crest height is created; it is lowest at the inner diameter, highest at the outer diameter.

In a third embodiment, both the ridge lines and the valley floor lines are conical, but with different angles of inclination et _t u. o^, so that ridges of different heights are also created and the surface consequently takes into account the deflection of the flanges, at least in part.

The three variants described above are illustrated by the attached figures, which require no further comment.

Claims (5)

REINZ-Dichtungs-GmbH.: J"! ' j j'"j * ·*"· &idigr;-;· 18.04.1984 Reinzstraße 3-7 791.0 Neu-ülm CLAIMS 1. Comb-profiled metallic or non-metallic sealing ring, characterized in that its two active contact sealing surfaces and/or valley bottom lines of the comb profile run conically with an inclination from the inner diameter to the outer diameter. 2. Sealing ring according to claim 1, characterized in that its crest lines are conical, but the valley bottom lines run parallel to one another, i.e. perpendicular to the diameter axis of the ring, the thickness being greatest at the inner diameter and smallest at the outer diameter. 3. Sealing ring according to claim 1 and 2 with mutually parallel surfaces and profile valley lines which touch an outwardly inclined conical surface, characterized in that the crest profile height is not constant over the ring width, but is smallest at the inner diameter and largest at the outer diameter. 4. Sealing ring according to claim 1, 2 and 3, whose two characteristic surfaces, ie comb surface and comb valley surface, are conical and incline from the inside to the outside, characterized in that the angle of inclination e£g of the comb surface is smaller than the 0L ₄ of the comb valley surface, so that comb profiles of different heights are created, the highest on the outer diameter, the lowest on the inner diameter. /2 I · 3 «j »ttly 5. Sealing ring according to claims 1 to 4, characterized in that the angle of inclination is less than 5.