Hamilton Sundstrand Corporation

Sundstrand Corporation

W Glen Smith

David G Halsey

Robert Grennan

William J Greenlee

A shaftless rotor (,) for a dynamoelectric machine includes a stack (,) of ferrous laminations (,) provided with a central opening (,) extending through the stack (,) and adapted to be located on the axis of rotation (,) of the rotor (,). A sleeve (,) is located in the central opening (,) for orienting the laminations (,) with respect to one another. Manifold and vane clamping pieces (,) are located on opposite sides of the stack (,) and engage the endmost laminations (,) and the sleeve (,). A pair of spaced shaft segments (,) engage respective ones of the clamping pieces (,) and a single tie bolt (,) extends through the sleeve (,) between the shaft segments (,) to interconnect the same. The tie bolt is in tension to apply clamping force to the shaft segments (,) for transmittal to the clamp pieces (,) to the laminations (,) in the stack (,).

Shaftless rotor construction

The hydraulic components of a cooling circuit for a dynamoelectric machine are eliminated in a totally air cooled dynamoelectric machine which includes a rotor (12) rotatable about an axis (14) and including a central stack (20) of ferrous laminations (22) defining a plurality of radially outwardly directed circumferentially spaced poles (132), spaced shaft ends (24,26) on the axis (14) and extending from opposite sides of the stack (20) and a first air passage (46) in the stack (20). Magnetic journal bearings (54,56) and a magnetic thrust bearing (58,60) are provided for the shaft segments (24,26) and impellers (62) are located on opposite sides of the stack (20). A stator (16) surrounds the rotor (12) and includes windings (76) connected by end turns (94) located exteriorally of the stator (16). Axial winding coolant passages (152,158) are provided adjacent the windings (76) in the stator and radial passages (70,72) are located in the rotor and the stator and in fluid communication with an outlet (74) from the housing. Rotor coolant passages (130) are located in the stack (20) and all of the passages receive air from the impellers (62).

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Caledonia, IL, United States of America

W Glen Smith