Direct gas cooled rotor endwinding ventilation schemes for rotating machines with concentric coil rotors
First Claim
1. A cooling gas ventilation circuit for an endwinding of a rotary machine having a rotor and a plurality of coils seated in radial slots provided in said rotor, said coils each comprising a plurality of radially stacked turns, said turns having radial passages therein, said coils extending beyond a pole face of the rotor to form said endwinding;
- a substantially cylindrical baffle ring covering radially innermost turns of said plurality of coils in said endwinding, said baffle ring having a plurality of holes therein aligned with said radial passages; and
wherein said radial passages communicate with cavities between said coils in said endwinding.
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Accused Products
Abstract
A cooling gas ventilation circuit for an endwinding of a rotary machine having a rotor and a plurality of coils seated in radial slots provided in the rotor, the coils each comprising a plurality of radially stacked turns, the turns having radial passages therein, the coils extending beyond a pole face of the rotor to form an endwinding; a substantially cylindrical baffle ring covering radially innermost turns of the plurality of coils in the endwinding, the baffle ring having a plurality of holes therein aligned with the radial passages; and wherein the radial passages communicate with cavities between the coils in the endwinding.
64 Citations
25 Claims
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1. A cooling gas ventilation circuit for an endwinding of a rotary machine having a rotor and a plurality of coils seated in radial slots provided in said rotor, said coils each comprising a plurality of radially stacked turns, said turns having radial passages therein, said coils extending beyond a pole face of the rotor to form said endwinding;
- a substantially cylindrical baffle ring covering radially innermost turns of said plurality of coils in said endwinding, said baffle ring having a plurality of holes therein aligned with said radial passages; and
wherein said radial passages communicate with cavities between said coils in said endwinding. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 25)
- a substantially cylindrical baffle ring covering radially innermost turns of said plurality of coils in said endwinding, said baffle ring having a plurality of holes therein aligned with said radial passages; and
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17. A cooling gas ventilation circuit for an endwinding of a rotary machine having a rotor and a plurality of coils seated in radial slots provided in said rotor, said coils each comprising a plurality of radially stacked turns, said turns having radial passages therein, said coils extending beyond a pole face of the rotor to form said endwinding;
- a substantially cylindrical baffle ring covering radially innermost turns of said plurality of coils in said endwinding, said baffle ring having a plurality of holes therein aligned with said radial passages;
said radial passages communicating with cavities between said coils in said endwinding by lateral exit ports extending from said radial passages on one or both sides of said turns;
said coils in said endwinding being supported on radially outermost surfaces by a retaining ring such that said coils are enclosed by said baffle ring, said retaining ring and a centering ring extending radially between said baffle ring and said retaining ring; and
wherein said rotor is formed with vent slots extending from said pole face in areas of said rotor between said radial slots in which said coils are seated. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
- a substantially cylindrical baffle ring covering radially innermost turns of said plurality of coils in said endwinding, said baffle ring having a plurality of holes therein aligned with said radial passages;
Specification