Centrifugal fan

Details Centrifugal fan Centrifugal fan

1991-09-11

1992-11-24

Kwon, John T.

Fluid reaction surfaces (i.e., impellers)

Specific working member mount

Turbo machine

403337, 403365, F04D 2934

Patent

active

051658577

ABSTRACT:
An improved centrifugal fan in which a fan blade is supported by a main plate and a side plate and said main plate is connected to a rotation shaft, characterized in that between the rotation shaft and the main plate, there is interposed a doughnut-shaped connecting plate penetrated by the rotation shaft at the central part thereof, the connecting plate is fixed to the rotation shaft and to the main plate, at the inner and outer circumferential parts of the connecting plate, respectively, a plurality of through holes are provided in the inner and outer circumferential parts of the connecting plate in the circumferential directions, respectively, and slits are formed between each pair of two opposite through holes positioned obliquely with respect to the direction of radius of the connecting plate. Non-reversible displacement of the center of the fan blade is avoided which is a major factor in the vibration of the fan blade.

REFERENCES:
patent: 1430486 (1922-09-01), Ayres
patent: 2638761 (1953-05-01), Henry
patent: 2681708 (1954-06-01), Mix
patent: 2754920 (1956-07-01), Derry
patent: 3147811 (1964-09-01), Klonoski
patent: 3912375 (1975-10-01), Franklin, Sr.
patent: 4058023 (1977-11-01), Smith

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