Water turbine capable of eliminating pressure fluctuation

A water turbine able to eliminate the pressure ripple features that a water inlet on the top cover of its main body is connected with a pressure pipeline having regulation valve for introducing upstream water to it, several water inlet holes are made on the top crown of main body, and several water drainage holes are arranged around the drain cone. Its advantages are high effect to eliminate pressure ripple and instantaneous regulation to the flow state of drained water. 本发明涉及一种具有消除压力脉动功能的水轮机，它包括水轮机本体，其特征在于：在所述水轮机本体的顶盖上设置有进水口，在所述进水口上连接引上游水的压力管道，所述管道上设置有调节阀，在所述水轮机本体的上冠上设置有若干进水孔，在所述水轮机本体的泄水锥周向设置有若干出水孔。本发明利用水刚度比空气大的原理，通过补水有效地消除了尾水涡带，降低了水轮机尾水管内的压力脉动。同时本发明选择泄水锥作为补水点，可以根据水轮机运行的具体工况点对叶轮出水流态进行即时调节，克服了安装固定补气设备造成的水轮机在正常工况运行时效率降低的弊病。本发明可以广泛用于各种使用混流式水轮机的水电站，特别是水头变幅大的水电站。