| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a refrigerant passage structure of rotor core which allows for measurement of the position of a passage in the rotor core.SOLUTION: The refrigerant passage structure of a rotor core has a first passage 13 extending in the axial direction of the rotor, a second passage 18 extending in the radial direction of the rotor and interconnecting the first passage 13 and a second refrigerant supply passage 6 formed in the shaft 3, and a protrusion 21 located on the same rotor shaft right-angle plane as the second passage 18 and protruding inward of the first passage 13. With such an arrangement, a determination can be made easily with high accuracy whether or not the second passage 18 of the rotor core 2 is located at a proper position for the second refrigerant supply passage 6, by measuring the distance between the end face 16 of the rotor core 2 and the protrusion 21.</p> |
