Abstract: A device for conducting cooling liquid in and out of liquid cooled rotor type machine such as an electric turbine generator. A discharging ring having small holes formed therein is disposed so as to cover an open end of an outflow pipe for cooling liquid from the rotor shaft. A first outlet chamber surrounds the open end of the outflow pipe to receive cooling liquid discharged through the discharging ring. A second outlet chamber having one end side integral with the first outlet chamber receives cooling liquid discharged through a seal between the first outlet chamber and the outflow pipe. Shielding gas is supplied into the first outlet chamber to maintain the pressure therein higher than atmospheric pressure. The first outlet chamber is only partially filled with cooling liquid.

Abstract: A device for conducting cooling liquid out of a liquid cooled rotor type rotary electric machine in which a sealing means is provided for preventing the leakage of cooling liquid from an outlet chamber adapted to receive the cooling liquid discharged from the rotary electric machine. The sealing means employs a thread seal and a rubber seal in combination. The rubber seal is provided in such a manner as to surround a cooling liquid supplying and draining pipe and so that it is expanded or contracted according to the pressure of gas introduced inside the rubber seal to adjust the gap between the rubber seal and the pipe. The pressure of gas is controlled according to the speed of rotation of the rotor shaft or the amount of liquid leakage.