| 摘要 |
Sealing arrangement for a drive rod or the like of preferably circular cross-section which moves through a wall closing off a chamber, filled with a fluid such as hydraulic oil, from its surroundings. The sealing arrangement is characterised in that an intermediate chamber (12) through which the drive rod (11) passes is arranged between the chamber (6, 9) and the surroundings. The intermediate chamber (12) is sealed off from the chamber (6, 9) by at least one inner groove ring (13, 14), enclosing the drive rod (11) and permeable to fluid in the direction of the chamber (6, 9) when there is a positive differential pressure in the intermediate chamber (12) in relation to the chamber (6, 9), and from the surroundings by an outer groove ring (15) enclosing the drive rod, in which arrangement fluid collecting in the intermediate chamber (12) through leakage can be returned in the chamber (6, 9) by a decrease in volume of the intermediate chamber (12). The invention also relates to an electrohydraulic actuating drive with a sealing arrangement of this type. <IMAGE>
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