| 摘要 |
Inlet bell for centrifugal fans having an impeller (15, 24) with a cover pla te (14, 23), the inlet bell opening into the cover plate with an intervening gap (I) for recirculation air, wherein the inlet bell (11, 20) is provided with a conical inlet part (12, 21), tapering towards the impeller (15, 24), and a mouthpiece (13, 22) connected to the inlet part, and in that a circular flow guide means (16, 23) is arranged at the intersection between the inlet part and th e mouthpiece of the inlet bell.
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