| 摘要 |
A sealing piston package, characterised in that it has one rigid reducer sleeve (2) secured on the piston rod (1). On the cylindrical surface, in the middle of the sleeve width (S), there is a shallow groove (5) for mounting a mobile sealing ring (6). In the internal cylindrical surface, there is a shallow groove (7) - coordinated with the groove (5) - for mounting a resting sealing ring (8) of O type. Moreover, there are shallow helical grooves (11,12) at the entire width of the external side surfaces (9 and 10) of the sleeve (2) on both side of the groove (5). |
