IMPROVED ROD SEAL ASSEMBLIES FOR MACHINES WITH CROSSHEADS AND SEALED OSCILLATING RODS

摘要

A rod seal assembly (1) for a machine comprising a crosshead (3) and a sealed oscillating piston rod (100), wherein the rod seal assembly (1) comprising: a seal housing (300), a rod seal (101), a bushing (400) and a rod seal base (200), wherein the rod seal (101), bushing (400) and the rod seal base (200) are annular and can be laterally moved in relation to the seal housing (300) the housing (300) axially supports the rod seal base (200), the rod seal base (200) is adapted to be arranged around the piston rod (100) and is provided with a base portion (106), wherein the base portion (106) comprises a lower axial surface (114) directed in a first axial direction an upper axial surface (113) directed in a second axial direction, wherein the lower axial surface (114) abut the housing (300) and the upper axial surface (113) is provided with a rod seal seat (201), the rod seal (101) is adapted to be arranged around the piston rod (100), and has a first end portion (102) and a second end portion (103), wherein the first end portion (103) is arranged to connect to the rod seal base (200) in the first axial direction, and the bushing (400) is arranged to abut the rod seal (101) in the first axial direction, and the rod seal base (200) and the bushing are arranged to have an axial overlap (250).