ROTATING MACHINE

A rotary machine which cools a cooling target inside a rotor which is rotatable around a rotational axis, by a thermosiphon action, comprises a condenser section which is disposed outside the rotor and condenses a gas phase cooling medium into a liquid phase cooling medium; an evaporator section which is disposed inside the rotor, and evaporates the liquid phase cooling medium generated by condensation in the condenser section into the gas phase cooling medium, by heat exchange between the cooling target and the liquid phase cooling medium; and a coupling pipe which flows therethrough the liquid phase cooling medium and the gas phase cooling medium between the evaporator section and the condenser section, and has a bent portion, wherein the coupling pipe has a pipe structure in which a liquid phase cooling medium passage which flows therethrough the liquid phase cooling medium generated by the condensation in the condenser section and a gas phase cooling medium passage which flows therethrough the gas phase cooling medium generated by evaporation in the evaporator section are separately provided. In this structure, the rotary machine can stably maintain the capability of thermal transport between the condenser section and the evaporator section, even in a case where the whole of the rotary machine is tilted or shakes.