| 摘要 |
A labyrinth seal of abradable design between a shaft and a partition separating regions of high and relatively lower gas pressure. The seal is located in close proximity to a gas permeable bearing also disposed between the shaft and the partition and located in the relatively lower pressure region. The seal permits limited leakage gas flow toward and through the bearing and pieces of seal material abraded during shaft rotation tend to entrain in the leakage gas flow. A baffle is disposed on the shaft between the seal and the bearing and defines a portion of a serpentine path for the leakage gas flow. A contamination trap containing a self-supporting adhesive material is formed on the baffle perpendicular to a portion of the serpentine path so that while the leakage gas turns 90 DEG at the trap, the heavier particles of abraded material impact on and are captured by the adhesive material.
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