Abstract: A sealing device for rotor shaft of fluid machine. The sealing device has a solid annular packing extending circumferentially around the rotor shaft and including a plurality of circumferentially spaced segments. Each segment has a radially inner surface which functions as the sliding surface which is in sliding contact with the surface of the rotor shaft. The sliding surface is inclined from its edge adjacent to the low pressure side of the fluid machine radially outwardly, so that the sliding surface makes the initial sliding contact with the rotor shaft surface only at its edge adjacent to the low pressure side.

Abstract: A pump starting method for hydraulic machinery such as a pump turbine and a pump having adjustable guide vanes and an inlet valve, by which hydraulic vibrations due to pump no discharge operation can be prevented by beginning pumping-up with said adjustable guide vanes being opened before a main valve included in a said inlet valve is fully opened in starting the pump.