| 摘要 |
A sealing ring for sealing a piston rod (12), particularly a piston rod (12) of a pneumatic spring (10), which has a container tube (11) in which there is a pressurised gas. The piston rod (12) is guided on the outlet-side end of the container tube by means of a piston rod guide (14) and is externally sealed by a piston rod seal. Between the piston rod seal and the operating chamber (15) containing the compressed gas there is located a sealing chamber (16), which is separated from the gas-filled operating chamber (15) by means of a sealing ring (17). The sealing chamber (16) is filled with a compressed gas, whose gas pressure is higher than that in the operating chamber (15). The pressure in the sealing chamber (16) is higher than the pressure in the operating chamber (15). An outer sealing ring (17), allocated to the piston rod guide (14), and an inner sealing ring (18), allocated to the operating chamber (15), are provided in the sealing chamber (16). These sealing rings (17, 18) have radially outer sealing lips (19, 21) and radially inner sealing lips (20, 22). The outer sealing lips (19, 21) rest on the inner wall of the container tube (11) and the radially inner sealing lips (20, 22) rest on the piston rod (12). The sealing lips (19, 20) of the outer sealing ring (17), and the sealing lips (21, 22) of the inner sealing ring (18) are arranged facing one another. …<IMAGE>… |
