Dichtungstechnik G. Bruss Gmbh & Co. Kg

Gerd Upper

Jurgen Hering

Rolf Johnen

Jesus Bengoa

Antonio Gorrino

Carl-Joseph Testroet

Siegfried Flossmann

Michael Vom Schwemm

A shaft sealing ring, comprising an elastic sealing lip which has a sealing edge in engagement with a circumferential surface of a shaft which rotates relative to the shaft sealing ring, further comprising at least two sinusoidally curved helical elements having the same amplitudes and wavelengths which are provided on a sealing lip surface facing the surroundings and serve to convey medium that has escaped to the side of the surroundings back over the sealing edge to the side of the medium of the shaft sealing ring, the helical elements being arranged phase-shifted with respect to each other in circumferential direction and merging tangentially in circumferential direction into the sealing edge is characterized in that the ratio between the wavelength L and the amplitude A of the sinusoidally curved helical elements fulfills the relationship

Shaft sealing ring

An annular shaft seal includes an elastic sealing lip which carries a twist element at its contact surface at the side exposed to air. The twist element is designed to return any liquid which may have exited to the air side back to the liquid side of the seal over the sealing edge, with both directions of rotation of the shaft. At least two sinusoidal twist ribs having the same amplitude and phase are shifted in phase position and bear snugly and tangentially against the sealing edge.

Annular shaft seal having an elastic sealing lip

A seal assembly for a shaft extending out of a casing and, in particular, the crankshaft received in the crankcase of a motor vehicle includes a gasket receptacle in the form of a metal die casting having a passage opening for the shaft. A dynamic shaft seal ring is inserted in the passage opening of the gasket receptacle and a static gasket separate from the shaft seal ring and made from the same elastomer material as the ring is located on the side of the receptacle facing the casing. The shaft seal ring and the static gasket are moulded from the same side and in one operation onto the gasket receptacle.

Shaft seal and gasket assembly

A seal for sealing the end of a shaft passing out of the end wall of a casing, as well as for sealing the end wall, is characterized in that a gasket receptacle is manufactured as a light metal pressure die casting, that a polytetrafluoroethylene sealing member is pressed from one side of the gasket receptacle towards which a recess is open and the radially outer portion of the shaft seal ring is injected round on either side with an elastomer material via a connecting channel of the die casting towards an end wall-side groove for receiving a static gasket during its moulding to the gasket receptacle. In the final operating stage, the sealing lip of the sealing member penetrated by a tube is bent axially by drawing onto a sleeve.

Method for the manufacture of a shaft seal

A seal for sealing the end of a shaft passing out of the end wall of a casing and for sealing the end wall includes a gasket receptacle produced as a light metal pressure die casting. A sheet metal ring with a shaft seal ring molded onto it is pressed radially and axially into a recess in the die casting. The gasket receptacle is plastically deformed and the radial internal dimension of the sealing edge of the seal ring is set within the requisite narrow tolerance limits. A radially directed outer portion of the sheet metal ring is covered on both sides with elastomer.

Shaft seal assembly

A shaft seal in which a sealing lip provided on an elastomeric portion of a first annular member is in sealing contact with a sealing surface of a second annular member which in operation is adapted to rotate relative to the first annular member, and in which an annular elastomeric support portion provided on the first annular member supports axial forces on a radial surface of the second annular portion. The support portion includes protrusions with apices which cooperate with the radial surface of the second annular member and are distributed circumferentially at uniform intervals.

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Hoisdorf, Germany

Gerd Upper