Antonelli, Terry, Stout & Kraus, LLP
Rotating machine
 An air ventilation hole provided on a creepage block and an air ventilation hole provided on a rotor winding, and having a different shape than the air ventilation hole provided on the creepage block communicate smoothly with an air ventilation hole provided on the most outer diameter turn of the rotary winding, which is in contact with the creepage block of the rotor winding. Accordingly, the withstand pressure of the creepage block can be maintained fully and also the flow of a cooling air flowing in a radial direction to the rotor winding, the creepage block, and a wedge can be formed smoothly. As a result, the cooling air can be increased and a heat exchange having a good efficiency can be carried out. Accordingly, the cooling performance of the rotor winding can be heightened and the creepage block can be formed with a high reliability against centrifugal force. 
Hitachi, Ltd.
H H H
H02K H02K H02K
inventional inventional inventional
Tadashi Akitomi
Sonobe Semba