| 摘要 |
A hydraulic turbine comprises rotor or runner blades 13 mounted on a rotor hub or runner crown 7, and a stationary exit guide arrangement located downstream there from. The stationary exit guide arrangement comprising a stator hub or crown 15 located adjacent to the rotor hub 15 and a plurality of exit guide vanes 17, 18 extending there from. An intermediate exit flange or splitter 16 is attached between each exit guide vane 17, 18 to split the water exiting the rotor into separate passages. The exit guide vanes 17, 18 are also attached to a peripheral wall 19 of the turbine housing and supported thereby such that the stator hub 15 is not connected to any part of the turbine except for the exit guide vanes 17, 18. The stationary exit guide arrangement is intended to eliminate the loss of turbine efficiency caused by an axial circular vortex created in all turbine operating regimes other than the optimum without a decrease in maximum efficiency. |
