Taper pipe structure for improving incoming flow stability of working condition of water pump of pump turbine

The invention belongs to the field of pump turbines, and particularly relates to a taper pipe structure for improving pump working condition incoming flow stability of a pump turbine. The continuous equidistant non-protruding type annular rib high-resistance structure is arranged on the overflowing surface of the taper pipe, and the purposes that flow separation is restrained, formation of vortexes is reduced and the water flow direction and speed tend to be uniform and consistent are achieved in the mode that motion resistance is improved and motion energy is consumed; therefore, the stability of the incoming flow state of the pump working condition of the pump turbine is ensured. The vortex phenomenon at the water pump working condition taper pipe of the pump turbine caused by the Dean effect is effectively reduced, and the consistency of the water flow speed at the water pump working condition taper pipe of the pump turbine is improved. 本发明属于水泵水轮机领域，特别涉及一种提高水泵水轮机水泵工况来流稳定性的锥管结构。本发明在锥管过流表面设置连续等距非突出式环形肋高阻力结构，