Westinghouse Electric Corporation

Lowell M Swartz

Louis F Hackstie

Robert C Wynn

An anti-windage device is provided for use on the couplings formed by mating flanges of rotors for turbomachines, such as steam turbines and the like. The anti-windage device is comprised of upper and lower anti-windage ring segments. The anti-windage ring segments have holes for each of the nuts that are threaded onto the bolts that join the mating flanges into a rotor coupling. The holes enclose the nuts and the anti-windage ring segments fill the circumferential spaces between adjacent nuts. The ring segments are secured to the rotor flange by causing the nuts to bear against an annular lip formed in each hole. The depth of the holes and the axial thickness of the anti-windage ring is such that the end faces of the anti-windage ring, nuts and bolts are flush, thereby forming a smooth surface that minimizes windage.

Rotor coupling anti-windage apparatus

An apparatus and method are provided for preventing axial movement of a disc along the shaft on which it is shrunk. The apparatus features a set of arcuate retainers having one portion disposed in a circumferentially extending groove in the disc face and another portion disposed in a circumferentially extending groove in the shaft outer surface. The retainers are installed by inserting them one at a time into an entry slot in the disc adjacent the groove. The last retainer is a locking retainer and is attached to a closure piece by locking screws threaded into two holes drilled at the intersection between the closure piece and locking retainer so that one half of the circumference of the hole is formed in the closure piece and the other half of the circumference of the hole is formed in the locking retainer.

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Winter Springs, FL, United States of America

Lowell M Swartz