Rotary electric power generator
First Claim
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1. A rotary electric power generator comprising:
- a rotor;
axial winding slots on the peripheral face of the rotor disposed with intervals in the circumferential direction at both sides of the magnetic pole parts of the rotor;
sub-slots opening at the bottom of the winding slots;
rotor windings arranged coaxially with respect to the magnetic pole, extending at and outside of the winding slots, and having conductor insulation materials laminated alternately thereon;
wedges in which the rotor windings are fixed to the rotor in the winding slots;
a retaining ring on the rotary shaft peripheral side of the rotary windings, the retaining ring extending outside of the winding slots at both ends of the rotor; and
insulation blocks of the rotor windings interposed between wedges or retaining rings, the rotor windings having a number of radial ventilation flow passages passing from the sub-slots to the insulation blocks and wedges, wherein a projection or rib is provided at the inner face of the radial flow passage with respect to the flow direction of the cooling fluid in the radial flow passage; and
wherein the hole width of the conductor insulation material is smaller than the hole width of the conductor.
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Accused Products
Abstract
A turbine electric power generator is provided with winding slots and sub-slots of a rotor; rotor windings having conductors and insulation materials laminated alternately thereon; wedges; and radial ventilation flow passages communicating the sub-slots with through holes of the wedges. In this turbine electric power generator, a projection is provided on an inner face of the radial ventilation flow passages, and the projection height is changed at a rotational axial position. In this manner, there can be provided a gas cooling type rotary electric power generator for turbine with its high cooling performance and high reliability at a low cost.
43 Citations
1 Claim
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1. A rotary electric power generator comprising:
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a rotor;
axial winding slots on the peripheral face of the rotor disposed with intervals in the circumferential direction at both sides of the magnetic pole parts of the rotor;
sub-slots opening at the bottom of the winding slots;
rotor windings arranged coaxially with respect to the magnetic pole, extending at and outside of the winding slots, and having conductor insulation materials laminated alternately thereon;
wedges in which the rotor windings are fixed to the rotor in the winding slots;
a retaining ring on the rotary shaft peripheral side of the rotary windings, the retaining ring extending outside of the winding slots at both ends of the rotor; and
insulation blocks of the rotor windings interposed between wedges or retaining rings, the rotor windings having a number of radial ventilation flow passages passing from the sub-slots to the insulation blocks and wedges, wherein a projection or rib is provided at the inner face of the radial flow passage with respect to the flow direction of the cooling fluid in the radial flow passage; and
wherein the hole width of the conductor insulation material is smaller than the hole width of the conductor.
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Specification
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Current AssigneeHitachi, Ltd.
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Original AssigneeHitachi, Ltd.
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InventorsHattori, Kenichi, Mori, Hideaki, Shiobara, Ryoichi, Kaiho, Masayuki, Kieda, Shigekazu
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Primary Examiner(s)NGUYEN, TRAN N
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Application NumberUS09/642,016Time in Patent Office771 DaysField of Search310/52, 310/58, 310/60.A, 310/61, 310/60.R, 310/201, 174/15.6, 174/16.2, 174/682US Class Current310/61CPC Class CodesH02K 15/0414 Windings consisting of sepa...H02K 3/24 with channels or ducts for ...
