| 摘要 |
A shaft seal, particularly intended for screw conveyors used to convey powdered materials, includes a stuffing box (5) which is fitted around a rotatable shaft (2) to be sealed. This stuffing box (5) is comprised of two parts (6, 7) which can be fitted together and which define around the shaft (2) a sealing chamber (8) which accommodates sealing elements (9, 10). The sealing elements are comprised of a lubricating barrier ring (9), filled with lubricating grease under a given pressure, and a sealing ring (10) fitted on each side of the barrier ring (9), said sealing ring preferably being made of woven tetrafluoroethylene. |
