| 摘要 |
Variable-pitch propeller blades are mounted for rotation about the longitudinal axis of the propeller hub and also for independent rotation about radial axes of the hub. The blades are rotated about the radial axes to change their pitch by guides slidably mounted in slots in a plurality of interlocking floating plates. A sealing system includes a stationary double-ring seal biased against the sealing surfaces of the rotatable propeller hub and a static head of fluid acting at critical points of the propeller hub to prevent leakage of surrounding water into the propeller hub and drive assemblies.
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