Slide ring for axially acting shaft sealing rings

Claim 1

An axially effective hydrodynamic-type slide ring for axially acting shaft sealing rings with as small a slide friction as possible for a good seal having a quiet operating relationship and a small leakage of the seal of the slide ring which has an outer circumferential surface and an inner circumferential surface and a side face extending radially from said inner circumferential surface to said outer circumferential surface to form a sliding surface of said ring, an annular area of said sliding surface adjacent said outer circumferential surface being provided with a multiplicity of pairs of circumferentially spaced grooves extending only to said outer circumferential surface and distributed over said annular area on said sliding surface, the grooves of each pair lying with spacing upon each other in the peripheral direction of the outer circumferential surface whereby the smooth sliding surface lying between the groove pairs intersecting with each groove at an angle to the radius at the point of intersection have a transition that is uninterrupted in the inner circumferential surface, more particularly said annular area being spaced from the inner circumferential surface to leave an annular groove-free zone of a circumferential, smooth, uninterrupted surface between said annular area and said inner circumferential surface, said smooth surface extending between said pairs of grooves to said outer circumferential surface, said grooves producing a back-feeding effect of the medium to be sealed.