| 摘要 |
A centrifugal pump of the type in which fluid enters radially includes a debris blocking shield over a space around a shaft seal with a channel to supply energized fluid to near the center of the pump impeller. Apertures in the impeller then pass the fluid longitudinally through the impeller and the seal space covered by the shield, with a shield gap for the return of the fluid from the seal space into the main stream.
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