Cooling arrangement for rotor end turns of reverse flow cooled dynamoelectric machines
First Claim
1. A reverse flow cooled dynamoelectric machine comprising:
- a. a stator;
b. a rotor disposed within the interior of said stator and defining with said stator a gas gap;
c. said rotor including a spindle and a winding including end turns disposed radially outward from said spindle;
d. a cylindrical turbine coupling formed integrally with said rotor spindle on the turbine end of said spindle for connecting said rotor to a driving turbine;
e. a fan ring formed integrally with said spindle, said fan ring located axially inward from and proximate to said turbine coupling and having an inner diameter less than the outer diameter of said coupling;
f. a fan mounted on said ring for circulating cooling gas through said rotor and said stator; and
g. a plurality of passages extending through said fan ring and a portion of said spindle for the conduction of cooling gas to said end turns, said passages extending in a direction at an angle to the axis of said rotor and corresponding to the most practicable extent to the vector sum of the axial and tangential components of the velocity of the cooling gas entering said passages to minimize pressure losses in the flow of cooling gas through said passages.
0 Assignments
0 Petitions
Accused Products
Abstract
A reverse flow cooled dynamoelectric machine if provided with cooling gas passages extending through a fan ring and a portion of the rotor spindle to the end turns of the rotor winding in a direction substantially corresponding to the direction of flow of the cooling gas as modified by a tangential component imparted to the gas by the rotation of the fan ring. This direction is the vector sum of the longitudinal component of the velocity of the gas as it approaches the passages and the tangential component imparted by the rotation of the fan ring. The exit end of each passage is circumferentially displaced from the inlet end opposite to the direction of rotation. The centerlines of the gas passages lie in planes spaced around the axis of rotation of the rotor and parallel to this axis.
34 Citations
3 Claims
-
1. A reverse flow cooled dynamoelectric machine comprising:
-
a. a stator; b. a rotor disposed within the interior of said stator and defining with said stator a gas gap; c. said rotor including a spindle and a winding including end turns disposed radially outward from said spindle; d. a cylindrical turbine coupling formed integrally with said rotor spindle on the turbine end of said spindle for connecting said rotor to a driving turbine; e. a fan ring formed integrally with said spindle, said fan ring located axially inward from and proximate to said turbine coupling and having an inner diameter less than the outer diameter of said coupling; f. a fan mounted on said ring for circulating cooling gas through said rotor and said stator; and g. a plurality of passages extending through said fan ring and a portion of said spindle for the conduction of cooling gas to said end turns, said passages extending in a direction at an angle to the axis of said rotor and corresponding to the most practicable extent to the vector sum of the axial and tangential components of the velocity of the cooling gas entering said passages to minimize pressure losses in the flow of cooling gas through said passages. - View Dependent Claims (2, 3)
-
Specification