| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an electric machine having a cooling rotor shaft.SOLUTION: A cooling device 12 includes a fixed cooling lance 13 which penetrates through a hollow shaft 3 in an axial direction. The cooling lance 13 includes: a refrigerant inlet 16 and a refrigerant outlet 17; and a cooling duct 18 for guiding a refrigerant through the cooling lance 13. The cooling duct 18 is connected with the inlet 16 and the outlet 17 and penetrates through the cooling lance 13 in the axial direction. The cooling lance 13 includes: an oil inlet 24 and an oil outlet 25; and an oil duct 26 for guiding an oil through the cooling lance 13. The oil duct 26 is connected with the oil inlet 24 and the oil outlet 25 and penetrates through the cooling lance 13 in the axial direction. The oil outlet 25 is connected with an annular space 27 formed between the cooling lance 13 and a rotor shaft 3. The annular space 27 has an oil opening 28.</p> |
