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AssigneeAzelio AB
InventorsPer ESKILSSON, Andreas VERNER, Francisco Xavier BORRAS, Andreas BAUMUELLER, Åke EDVINSSON, Olle SÄÄW
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A rod seal assembly for a machine includes a crosshead and a sealed oscillating piston rod. The rod seal assembly includes a seal housing, a rod seal, a bushing and a rod seal base, wherein the rod seal, bushing and the rod seal base are annular and can be laterally moved in relation to the seal housing the housing axially supports the rod seal base, the rod seal base is adapted to be arranged around the piston rod and is provided with a base portion, wherein the base portion includes a lower axial surface directed in a first axial direction an upper axial surface directed in a second axial direction, wherein the lower axial surface abut the housing and the upper axial surface is provided with a rod seal seat, the rod seal is adapted to be arranged around the piston rod, and has a first end portion and a second end portion, wherein the first end portion is arranged to connect to the rod seal base in the first axial direction, and the bushing is arranged to abut the rod seal in the first axial direction, and the rod seal base and the bushing are arranged to have an axial overlap.
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:
The rod seal assembly (1) according to any of the preceding claims, wherein the rod seal base (200) and the bushing (400) have a radial contact at the axial overlap (250).
The rod seal assembly (1) according to any of the preceding claims, wherein the rod seal (101) comprises a shoulder portion (104), and the bushing (400) comprises a corresponding shoulder portion (402) arranged to mate with the shoulder portion (104) of the rod seal (101).
The rod seal assembly (1) according to 4 or 5, wherein the shoulder portion (104) of the rod seal (101) is provided with a secondary seal ring (105).
The rod seal assembly (1) according any of the preceding claims, wherein at both axial sides of the base (106) of the rod seal base (200) the seal housing (300) extends radially inwards relative an outer periphery (109) of the base (106) of the rod seal base (200).
The rod seal assembly (1) according to any of the preceding claims, wherein an inner seal ring (203) is arranged between lower surface (114) of the base (106) and the seal housing (300).
The rod seal assembly (1) according to any of the preceding claims, wherein the rod seal assembly (1) is provided with a gas-permeable covering (600) in proximity of the first end portion (102) of the rod seal (101), wherein the covering (600) is annular and guided by the bushing (400) such that it follows lateral movements of the bushing (100).
The rod seal assembly (1) according to any of the preceding claims, wherein the rod seal assembly (1) further comprises at least one spring member (500) arranged to apply an axial force (Fs), in the first axial direction (AD1), to the rod seal (101) via the bushing (400).
Dependencies are inferred from the claim text.