Laminated rotor for a dynamoelectric machine and method of making same
AssigneeGeneral Electric Company
InventorHenry G. Lenz
Life of this patent
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Abstract
A laminated rotor for a dynamoelectric machine is formed by stacking a plurality of sets of punched laminae on one another to define axial coolant passageways, radial vents and coolant ducts and axial conductor-receiving slots through the assembled rotor. Each of the sets of laminae include a group of main rotor laminae, a group of vent laminae, a group of duct laminae and a transition lamina positioned between the vent laminae and duct laminae. In addition, a transition lamina is positioned between each set of stacked laminae thereby to arrange one transition lamina on opposite sides of each group of duct laminae, to effectively block molten metal from flowing out of the conductor slots into the coolant ducts of the duct laminae.
Claims11
A laminated rotor for a dynamoelectric machine having cast axial conductors, and radial ventilating ducts that extend between said conductors at axially spaced points along the conductors, comprising:
- a. a plurality of main rotor laminae each having arcuately spaced conductor slots and arcuately spaced coolant passageways, said coolant passageways being positioned radially inward from said conductor slots,
- b. a plurality of vent laminae each having arcuately spaced conductor slots and arcuately spaced vent apertures, said vent apertures each having a greater radial length than the radial length of said coolant passageways in the main conductor laminae and each vent aperture being positioned radially inward from said conductor slots,
- c. a plurality of duct laminae each having arcuately spaced conductor slots, coolant passageways and coolant duct slots, each of said coolant duct slots being positioned between a respective pair of conductor slots,
- d. a plurality of transition laminae each having arcuately spaced conductor slots and arcuately spaced vent apertures, said vent apertures being positioned radially inward from said conductor slots,
- e. all of said laminae being stacked to form a laminated rotor having a plurality of sets of laminations, at least one of said transition laminae being positioned in the stack between each of said sets, each of said sets comprising a group of said main rotor laminae stacked next to a group of said vent laminae and at least one transition laminae stacked between said group of vent laminae and a group of duct laminae.
- f. the longitudinal axes of the conductor slots in all of said laminae being in substantial alignment, and all of said coolant passageways being generally aligned and in overlapping relationship with the vent apertures in said vent laminae and the transition laminae, and
- g. a plurality of cast conductors positioned, respectively, in each of said conductor slots.
Dependencies are inferred from the claim text.