Fluid reaction surfaces (i.e. – impellers) – Rotor having flow confining or deflecting web – shroud or... – Radially extending web or end plate
Patent
1980-01-28
1982-12-14
Smith, Leonard E.
Fluid reaction surfaces (i.e., impellers)
Rotor having flow confining or deflecting web, shroud or...
Radially extending web or end plate
416DIG3, 291568CF, F04D 2928
Patent
active
043636012
ABSTRACT:
Disclosed is a centrifugal-blower impeller made from a back plate and a front plate and blades attached between these plates. The back plate or the front plate of the impeller or both of them are prestressed in a direction opposite to the stresses produced by centrifugal force when the impeller rotates. According to a preferred embodiment of the impeller the back plate is prestressed by means of a stressing member having the shape of a truncated cone, which is supported by the inner end of the hub of the driving shaft of the blower. In addition a stressing flange is attached to said hub and is tightened to the back plate by means of bolts. The front plate may be prestressed by means of a stressing ring mounted on the suction ring of the front plate.
REFERENCES:
patent: 892262 (1908-06-01), Jaeger
patent: 1873974 (1932-08-01), Meyer
patent: 4028005 (1977-06-01), Eck
Oy Nokia AB
Smith Leonard E.
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