Fluid reaction surfaces (i.e. – impellers) – Rotor having flow confining or deflecting web – shroud or... – Radially extending web or end plate
Patent
1977-12-05
1979-11-06
Powell, Jr., Everette A.
Fluid reaction surfaces (i.e., impellers)
Rotor having flow confining or deflecting web, shroud or...
Radially extending web or end plate
416214A, 416244R, F04D 1708
Patent
active
041734297
ABSTRACT:
A hub assembly for a centrifugal fan subjected to large transient thermal stresses is provided in which a pair of opposed hubs sandwich the inner peripheral margin of a disc-shaped fan plate, with the inner peripheral margin of the plate including a thickened ring portion to provide oppositely projecting annular shoulders at the outer periphery of the thickened ring portion, with the opposing hubs having annular recesses to receive the thickened ring portion and with the outer peripheries of the recesses in closely abutting relation with the shoulders to provide a shoulder-recess bearing area and with a plurality of fastener means extending through the hubs and through the thickened ring portion so that the shoulder-recess bearing area, which is located radially outwardly from the bearing stress areas at the bolt holes, largely receives the transient thermal stresses and therefore reduces the stress in the bolts and plate.
REFERENCES:
patent: 116414 (1871-06-01), Cochrane
patent: 1345951 (1920-07-01), Phelps
patent: 1999326 (1935-04-01), Forsyth
patent: 2473814 (1949-06-01), Nygren
patent: 2981517 (1961-04-01), Georges
patent: 3602609 (1971-08-01), Hoffman
patent: 3832091 (1974-08-01), Hoffman
Hoffman Joseph H.
Thompson Daniel G.
Arenz E. C.
Powell Jr. Everette A.
Westinghouse Electric Corp.
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