Patent attributes
An inwardly tensioning plain compression ring for sealing a rotating part with respect to a fixed part. The plain compression ring separates a positive pressure region from a low pressure area and has, in reference to the circumference, two opposite ends, designed as a joint or lock and which can be connected. A radial, inner circumferential surface, or at least at an axial circumferential surface of the plain compression ring has a ring shape lubrication groove for accommodating a supplied lubricant which comes from the positive pressure region. The plain compression ring has at least one ring shaped lubrication groove which is not completely circular, but has a closed end and an open end. The open end of the lubrication groove opens into an overflow area which is in flow connection with a leakage area of the joint or the lock.
