Abstract: A rotary shaft seal device in a hydraulic machine. With the water seal segments in the conventional water seal device, a gap tends to be generated between the inner peripheral surface of the segment packing and the outer peripheral surface of a liner of the rotary shaft due to the wear during use and progressively developed. The present invention contemplates to minimize the gaps between the adjacent segments and guide members interposed between the adjacent segments are solidly secured, whereby the flow rate of water leakage through the segments is reduced and the segments themselves are improved in mechanical strength, so that the segments can be reduced in size and the water seal device itself can be rendered compact in size.

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.