Rotor assembly for dynamo electric machines
First Claim
1. A rotor assembly for a dynamo electric machine, the rotor assembly comprising a rotor core incorporating radially extending rotor poles, rotor windings encircling respective rotor poles, circumferentially extending pole tips at the outer end of each pole respectively, said tips overlying the rotor winding encircling the respective pole, a plurality of rotor slot closure members, each closure member spanning the gap between a pair of adjacent poles, and including lateral flanges interposed between the respective rotor windings and the associated pole tips, a spacer member positioned beneath each closure member and engaging the radially extending faces of the adjacent windings, and, a locking wedge assembly comprising a pair of tapering locking wedges extending axially of the rotor assembly between each closure member and the associated spacer, the locking wedges extending with their tapers in opposite directions so that moving the wedges longitudinally towards one another increases the radial dimension of the combination of the locking wedges driving the associated spacer and closure apart in a radial direction.
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0 Petitions
Accused Products
Abstract
A rotor assembly for a dynamo electric machine, the rotor assembly comprising a rotor core incorporating radially extending rotor poles, rotor windings encircling respective rotor poles, circumferentially extending pole tips at the outer end of each pole respectively, said tips overlying the rotor winding encircling the respective pole, a plurality of rotor slot closure members, each closure member spanning the gap between a pair of adjacent poles, and including lateral flanges interposed between the respective rotor windings and the associated pole tips, a spacer member positioned beneath each closure member and engaging the radially extending faces of the adjacent windings, and, a locking wedge assembly comprising a pair of locking wedges extending axially of the rotor assembly between each closure member and the associated spacer, the locking wedges extending with their tapers in opposite directions so that moving the wedges longitudinally towards one another increases the radial dimension of the combination of the locking wedges driving the associated spacer and closure apart in a radial direction. Also disclosed is a method of manufacturing a rotor assembly.
26 Citations
12 Claims
- 1. A rotor assembly for a dynamo electric machine, the rotor assembly comprising a rotor core incorporating radially extending rotor poles, rotor windings encircling respective rotor poles, circumferentially extending pole tips at the outer end of each pole respectively, said tips overlying the rotor winding encircling the respective pole, a plurality of rotor slot closure members, each closure member spanning the gap between a pair of adjacent poles, and including lateral flanges interposed between the respective rotor windings and the associated pole tips, a spacer member positioned beneath each closure member and engaging the radially extending faces of the adjacent windings, and, a locking wedge assembly comprising a pair of tapering locking wedges extending axially of the rotor assembly between each closure member and the associated spacer, the locking wedges extending with their tapers in opposite directions so that moving the wedges longitudinally towards one another increases the radial dimension of the combination of the locking wedges driving the associated spacer and closure apart in a radial direction.
- 8. A method of manufacturing a rotor assembly for a dynamo electric machine comprising, starting with a rotor core including a plurality of circumferentially spaced radially extending poles encircled by respective rotor windings, a respective spacer received in the gap between the windings of each circumferentially adjacent pair of windings, a respective closure member circumferentially spanning the gap between the poles of each adjacent pair of poles, each closure member including lateral flanges received between a respective winding and the underside of a respective circumferentially extending pole tip, and the method including introducing a respective locking wedge assembly between each spacer and its associated closure, each locking wedge assembly comprising first and second elongate tapering wedges with their tapers extending in opposite directions axially of the rotor assembly, said first and second wedges having their taper arranged radially of the rotor assembly, the first wedge having a face in contact with the respective closure member, the second wedge having a face in contact with the respective spacer, and the two wedges having their opposite face in sliding contact, and, driving the wedges axially of the rotor assembly to move their wider ends towards the transverse median plane of the rotor assembly so as to urge the respective closure member and the respective spacer radially apart.
Specification