Assembly method for liquid cooled permanent magnet rotor
First Claim
1. A method of assembling a permanent magnet rotor for an electrical generator comprising:
- mounting an inner core component having a plurality of longitudinally extending core passages coaxially on a rotor shaft defining a first longitudinally extending shaft passage and a second longitudinally extending shaft passage;
positioning a permanent magnet outer core component circumferentially about the inner core component;
fluidly connecting a first rotor cooling circuit segment which includes the first longitudinally extending shaft passage with a second rotor cooling circuit segment which includes the plurality of longitudinally extending core passages via sealingly coupling a first liquid containment cover to a first axial end of the inner core component at a first mounting location which is radially inward of a cylindrical outer surface of the inner core component; and
fluidly connecting the second rotor cooling circuit segment with a third rotor cooling circuit segment which includes the second longitudinally extending shaft passage via sealingly coupling a second liquid containment cover to a second axial end of the inner core component at a second mounting location which is radially inward of the cylindrical outer surface of the inner core component.
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Abstract
A permanent magnet rotor for an electrical generator includes a rotor shaft and a rotor core mounted coaxially upon the rotor shaft. The rotor core defines a plurality of longitudinal core passages which include a segment of a rotor cooling circuit, and further includes a permanent magnet outer core component mounted on an inner core component and including a plurality of permanent magnets. A cooling liquid containment mechanism for the permanent magnet rotor includes a first liquid containment cover coupled to the inner core component and a second liquid containment cover coupled to the inner core component. The liquid containment covers are configured to contain cooling liquid passed from an inlet segment of the rotor cooling circuit defined by the rotor shaft into the plurality of longitudinal core passages, and thenceforth into an outlet segment of the rotor cooling circuit also defined by the rotor shaft. The liquid containment covers are mounted on the inner core component at locations radially inward of a cylindrical outer surface thereof.
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Citations
7 Claims
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1. A method of assembling a permanent magnet rotor for an electrical generator comprising:
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mounting an inner core component having a plurality of longitudinally extending core passages coaxially on a rotor shaft defining a first longitudinally extending shaft passage and a second longitudinally extending shaft passage; positioning a permanent magnet outer core component circumferentially about the inner core component; fluidly connecting a first rotor cooling circuit segment which includes the first longitudinally extending shaft passage with a second rotor cooling circuit segment which includes the plurality of longitudinally extending core passages via sealingly coupling a first liquid containment cover to a first axial end of the inner core component at a first mounting location which is radially inward of a cylindrical outer surface of the inner core component; and fluidly connecting the second rotor cooling circuit segment with a third rotor cooling circuit segment which includes the second longitudinally extending shaft passage via sealingly coupling a second liquid containment cover to a second axial end of the inner core component at a second mounting location which is radially inward of the cylindrical outer surface of the inner core component. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification