END SEALING Russian patent published in 2007 - IPC F16J15/34 

FIELD: sealing devices for rotating shafts.

SUBSTANCE: end sealing has casing, sleeve positioned on shaft, rotating sealing ring positioned on sleeve and non-rotating sealing ring placed within casing, said rings contacting with one another over their frictional surfaces. Circular channel is connected through grooves with radial conical cavities formed within sleeve, with apexes of conical cavities being directed outside and communicating with cavity to be sealed. Rotating sealing ring consists of at least three concentric rings disposed within respective circular channels of sleeve and separated from one another by means of projections so that catching circular grooves are defined therebetween, said circular grooves being connected through channels with radial conical cavities which are closed with balls retained by springs. Internal rotating sealing ring is sealed and immovably fixed within sleeve and external rings are sealed in radial direction and movable in axial direction.

EFFECT: enhanced reliability in operation of sealing.

2 dwg