| 摘要 |
<p>The present invention relates to a rotor shaft configured to be rotated around a rotor axis of the rotor shaft. The rotor shaft comprises: a rotor cavity (120) concentrically or semi-concentrically configured with respect to the rotor axis (110) inside the rotor shaft (100); and a plurality of cooling bores (130) radially or semi-radially extended from the inside of the rotor shaft (100) toward the outside of the rotor shaft. Each cooling bore (130) has a bore inlet position (160) and a distal bore outlet portion (134), and each bore inlet position (160) is configured to be adjacent to the rotor cavity (120). An unsymmetrical edge fillet (150) is provided to at least one side surface of a partial side surface of the cooling bore inlet position to minimize a wall thickness between two adjacent cooling bores (130).</p> |
