Hydraulic turbine with pressure impulse elimination

The utility model relates to a water turbine which has the function of eliminating pressure fluctuation. The water turbine, which comprises a water turbine main body, is characterized in that a top cover of the water turbine main body is provided with a water inlet; the water inlet is connected with a pressure conduit which leads upriver water; the pressure conduit is provided with a regulating valve; an upper canopy of the water turbine main body is provided with a plurality of water inlet holes; a runner cone of the water turbine main body is provided with a plurality of weep holes in the circumferential direction. The utility model, which utilizes the principle that water rigidity is larger than air rigidity, effectively eliminates tail water vortex strips and reduces pressure pulsation in a tail water pipe of the water turbine through water supplement. In addition, the utility model, which selects the runner cone as a water supplement point, can instantaneously adjust the existing water current state of impellers according to specific operating points of water turbine operation, which overcomes the defect that efficiency is reduced when the water turbine operates in normal working conditions caused by the installation of fixing gas supplement equipment. The utility model can be widely used in various hydraulic power stations where radial-axial flow turbines are used, particularly hydraulic power stations where the amplitude of the variation of a water head is large.