Centrifugal blower improved to reduce vibration and noise

Details Centrifugal blower improved to reduce vibration and noise Centrifugal blower improved to reduce vibration and noise

1995-09-15

1997-02-11

Denion, Thomas E.

Rotary kinetic fluid motors or pumps

With sound or vibratory wave absorbing or preventing means...

415206, 4152081, 4152111, F04D 2944, F04D 2966

Patent

active

056014007

ABSTRACT:
A centrifugal blower is provided with a casing which defines a spiral duct and a centrifugal fan which is rotationally provided within the casing. The centrifugal fan has a bottom plate and a plurality of blades which are equally spaced along the periphery of the bottom plate. The plurality of blades extends parallel to the rotational axis. The duct is arranged to reduce the size of a low velocity air flow zone which is generated in an upper radially outer region in the spiral duct. The low velocity air flow zone, which appears in an upper radially outer region in the air duct, is reduced to reduce surging in the blower.

REFERENCES:
patent: 3289598 (1966-12-01), Buse et al.
patent: 3523743 (1970-08-01), Jolette
patent: 3796511 (1974-03-01), Hansen
patent: 4450755 (1984-05-01), Catan
patent: 5352089 (1994-10-01), Tokunaga et al.
patent: 5399068 (1995-03-01), Park

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