| 摘要 |
PURPOSE:To enhance the reliability of a rotary electric machine by individually engaging retaining rings on the outer periphery of a plurality of crests of a longitudinally telescopic cylinder and forming gaps between adjacent rings, thereby reducing a stress which operates flexible water channel. CONSTITUTION:An axial water channel 6 is opened at the center of a rotor shaft 1, a radial water channel 5 which couples between a manifold 4 for collecting coolant to a rotor coil 2 and the channel 6 is provided, and a bellows-type cylindrical flexible water channel 7 for preventing the damage of a connector of the channel 5 to the channel 6 by absorbing the thermal expansion and contraction of the channel 6 is provided in the axial water channel. Retaining rings 9 made of high tensile strength material are individually engaged with the outer periphery of a plurality of crests of the cylinder of the channel 7, and a gap 9 which is necessary as a flexible joint is provided between the adjacent rings 9. |
