Centrifugal fan wheel with changeable pitch blades

Details Centrifugal fan wheel with changeable pitch blades Centrifugal fan wheel with changeable pitch blades

1981-10-08

1983-11-01

Coe, Philip R.

Fluid reaction surfaces (i.e., impellers)

Rotor having flow confining or deflecting web, shroud or...

Radially extending web or end plate

416147, 415129, F01D 522

Patent

active

044127839

ABSTRACT:
A centrifugal fan wheel is provided with blades 10 which may have their pitch changed through circumferential movement of a ring 30 tied to an outer tube 28 encompassing a drive shaft 24 and capable of having its rotative position relative thereto changed, through the axial movement of a control rod 38 to which is attached a pin 44 extending into the control rod through a diagonal slot 42 in the outer tube and an axial slot 40 in the drive shaft. In a further embodiment an inlet vane 50 has its angle changed through its pivotal relation that one edge of the vane with a slot 60 in the outer tube, so that both blade 10 pitch and vane 50 angle are concurrently changeable.

REFERENCES:
patent: 96168 (1869-10-01), Tuttle
patent: 683935 (1901-10-01), Hensel
patent: 962345 (1910-06-01), Hayner et al.
patent: 1067385 (1913-07-01), Taylor
patent: 1283908 (1918-11-01), Ripczinske
patent: 1309005 (1919-07-01), Weatherly
patent: 1368808 (1921-02-01), Koenig
patent: 1820467 (1931-08-01), Liska
patent: 4303375 (1981-12-01), Foglesong et al.

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