Fluid reaction surfaces (i.e. – impellers) – Rotor having flow confining or deflecting web – shroud or... – Axially extending shroud ring or casing
Patent
1995-09-29
1996-11-12
Larson, James
Fluid reaction surfaces (i.e., impellers)
Rotor having flow confining or deflecting web, shroud or...
Axially extending shroud ring or casing
416203, 416220A, 416221, 415912, 29888025, 2988921, 298893, 298891, F04D 2934
Patent
active
055733760
ABSTRACT:
An apparatus is provided that includes a bladed device having a hub which is rotatable about an axis and one or more blades attached to the hub by self-energizing, self-locking, insertion and retention features which are formed integrally with the blade and hub. The insertion and retention features include a locking tang formed integrally with the root of the blade, and detent features which are part of the locking tang and hub. As the blade is inserted axially into the hub, the locking tang deflects radially inward and then snaps radially outward by spring action of the tang to engage the detent feature of the hub, and thereby lock the blade against further axially or radially movement with respect to the hub. The locking tang is oriented and configured in such a manner that the locking tang is self-energizing, thereby causing the tang to grip the hub more tightly as rotational speed of the bladed device increases. The blades are configured to be readily removed for replacement with another blade of similar or different configuration, thereby facilitating manufacture, repair, and alternating performance of the bladed device. By inserting a hub filler into the hub in place of one or more of the blades, the performance of the bladed device may be readily modified by reducing the number of blades attached to the hub.
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Hayden Christopher T.
Hixson Jon A.
Crowe Lawrence E.
Larson James
Sundstrand Corporation
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