New-type dasher top cover of spindle sealing for water turbine

The utility model discloses a novel-type dasher top cover of spindle sealing for water turbine. The lower end of a top cover for water turbine (3) is added with a dasher ring (13) so that a gap (14) between the top cover (3) and a runner (2) is vertical upward. When the utility model operates, water from a water-guide leaf (5) can only fall on a side of the runner (2) with the influence of the dasher ring (13) and can not leak into the top cover (3). The utility model can effectively prevent water leakage in the top cover, improve the service life of a bearing, reduce times of replacement of lubricants when the water turbine is stopped, improve the output of a generator group, and lower generation costs. Besides, the sealing method is simple, the construction is easy, and the investment is low; one-time input can produce permanent benefits. The utility model is not only suitable for an axial flow turbine but also suitable for a tubular turbine.