DE1249034B - - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. Cl .:

F16 j

German class: 47 f - 22/60

Number: 1249034

File number: A 51165 XII / 47 "£ Filing date: December 23, 1965 Opened on August 31, 1967

The invention relates to a sealing device between two parts, in particular for the sealing of the regulating organ of a channel, which contains an elastically deformable seal with an inner chamber, which via a line and a valve located in this either with a source of pressurized fluid or with an outlet can be connected, this seal being attached in a receiving groove provided in one of the parts, which has an opening opposite has over the second part, through which the sealing surface part of the seal can protrude to to come into close contact with the second part.

There are already known inflatable seals in which the pressure of the medium to be sealed is in the inflatable body is directed to press the inflatable body against the counter-sealing surface and when this pressure is released, the seal is lifted off.

The invention is a new way for better sealing, in which the mode of action is reversed.

For this purpose, in the case of the sealing device mentioned at the beginning, according to the invention, one Groove side wall is concave and the seal »5 lies on all sides in the de-energized state Walls of the groove, with its sealing surface being lifted from the mating sealing surface of the second part and a pressure equalization channel is provided which connects the pressure space to be sealed with the groove interior and opens into the concavely curved groove side wall area, the seal being designed such that, at the same or greater Pressure in the inner chamber of the seal compared to the pressure in the space to be sealed, the sealing surface is in the lifted position, while at a low pressure in the interior caused by connecting this space with the outlet the sealing wall facing the concavely curved groove wall side turns into a toggle-like manner deformed approximately stretched position and thereby the sealing surface area of the seal sealing against the Counter-sealing surface of the second part is pressed.

As a source of pressurized fluid, in a manner known from inflatable body seals, the serving the medium itself.

A separate pressurized fluid source can also be provided, which alone or optionally in addition to the pressurized fluid source with the Inner chamber of the seal can be brought into connection.

In general, the pressure equalization channel opens

Sealing device between two parts Applicant:

Ateliers des Charmilles S. A., Geneva (Switzerland) Representative:

Dipl.-Ing. D. Jander and Dr.-Ing. Μ. Böning, Patent attorneys, Berlin 33, Hüttenweg 15

Named as inventor: Andri Culaud, Geneva (Switzerland) Claimed priority: Switzerland of January 27, 1965 (1149)

into a pressure distribution chamber, which is arranged in the area of the concave curvature of the groove side wall is.

The device described above is particularly advantageous if it is used, for example, for the sealing of Flap valves is used or for the sealing of outer surfaces of the guide vanes of distribution equipment for hydraulic turbines. It eliminates any need to use an overpressure device to seal the To control the seal, which can be a source of error in the event of failure of the overpressure device, when the personnel are in the downstream part of the line. However, an instantaneous positive pressure device would be used can to secure the filling of the inner chamber of the seal and to contribute to the Return the seal to the inoperative position, d. H. just before the valve opens, which is in would in no way be detrimental to the functional reliability of the device.

In the drawing showing an exemplary embodiment of the invention, FIGS. 1 and 2 partially and schematic views of a sealing device according to the invention showing the latter in an inoperative or operative position.

In the drawing, a movable part 1 can be seen, which has a chamber 2 in which a Seal 3 is brought into position by means of a removable cover 4, which is attached to the part 1 by

709 * 39/284

Claims (4)

Can fasten screws not shown. A channel 6 attached in the cover 4 opens into the chamber 2 on the outside of the seal 3, while a channel 7, which is attached in the part 1, opens into the chamber 2 on the inside of the seal 3. This latter consists of an elastic body which is split at 8 in such a way as to divide it into two parts 9 and 10 so that it has a general U-shape and delimits a chamber 11. The part 9 is outwardly curved or convex and can adapt to a cavity 12 of circular cross-section which is present in the cover 4. The channel 7 is connected to a pipe 13 which opens into a control valve 14, the cock of which shows a curved line 15. The fixed part 16 has a line 17 which, on the one hand, has its inlet in the ZomA, which is located upstream of the movable part 1, and its outlet through a pipe 18 to the control valve 14, with which a pipe 19 for the outlet ao connected is. The operation of the device is as follows: When zone A is subjected to a higher pressure than zone B and the cock of control valve 14 is in the position shown in FIG. 1, the pressure on the outside of part 9 of seal 3 is the same as in chamber 11 of this latter. As a result, the part 9 of the seal 3 assumes the rest position, which is shown in FIG. 1 and in which the active part of the seal 3, which protrudes from the movable part I, is withdrawn from the fixed part 16. When the cock of the valve 14 is turned into the position shown in Figure 2, the chamber 11 of the seal 3 is placed in communication with the outlet 19 that the pressure on the outside of the part 9 is greater than in the Kammerll. This part 9 rests against the part 10 of the seal 3, the protruding part of the latter then rests strongly against the fixed part 16 by knee action. If the part 1 is movable and the control valve is stationary, the tube 13 will of course be soft or pliable. When the movable part 1 z. B. is mounted pivotably about an axis perpendicular to the plane of the drawing, the line 7, instead of exiting directly from the movable part, as shown in the drawing, extend inside the part 1 up to the control shaft and then into the axis of this the latter, from where it can be connected to the control valve without the need for the flexible tube 13. This device can obviously also be used in the case where the two parts are immovable relative to one another. The seal 3 can consist of synthetic or natural rubber or any other deformable material. Patent claims: 1. Sealing device between two parts, in particular for sealing the regulating member of a channel, which contains an elastically deformable seal with an inner chamber, which can be connected via a line and a valve arranged in this either to a source of pressurized fluid or to an outlet, this being the case Seal is mounted in a receiving groove provided in one of the parts, which has an opening opposite the second part, through which the sealing surface part of the seal can protrude in order to come into tight contact with the second part, characterized in that one groove side wall is concave is arched and the seal rests against the walls of the groove on all sides in the tension-free state, its sealing surface being lifted from the counter-sealing surface of the second part and a pressure equalization channel (6) being provided which connects the pressure space to be sealed with the groove interior and in the concavely curved groove side wall area m ündet, wherein the seal is designed such that at the same or greater pressure in the inner chamber of the seal compared to the pressure in the space to be sealed, the sealing surface is in the lifted position, while at a lower pressure in the interior, which is by connecting this space with the Outlet is effected, the sealing wall facing the concavely curved groove wall side is deformed toggle-like into an approximately elongated position and the sealing surface area of the seal is thereby pressed sealingly against the counter-sealing surface of the second part. 2. Sealing device according to claim 1, characterized in that as a source of pressurized fluid the medium to be sealed itself is used in a manner known from inflatable body seals. ' 3. Sealing device according to claim 1 or 1 and 2, characterized in that a separate pressure fluid source is provided, which alone or optionally in addition to the im Claim 2 characterized pressure fluid source with the inner chamber of the seal can be brought into connection. 4. Sealing device according to claim 1, characterized in that the pressure equalization channel (6 ) opens into a pressure distribution chamber (12) which is arranged in the region of the concave curvature of the groove side wall. Considered publications:
German Auslegeschrift B 29050 IVb / 12g (published on September 8, 1955). 1 sheet of drawings 709 639/284 8.67 -® Bundesdruckerei Bcilin