| 摘要 |
The invention relates to a mobile distributor having two degrees of freedom with which Francis turbine or radial-pump turbine engines are to be provided, in order to vary, by means of the combined action of two rotations, the opening angle of the guide vanes, as well as the opening angle of the eccentric bearings affecting the value of the radius of installation of the guide vanes, in order to change the angles of the fluid streams at the trailing edge of the guide vanes and the fluid flow rate at the inlet of the wheel of the turbine engine. A three-dimensional conjugation rule is used for controlling the radius of installation of the guide vanes on the basis of the opening set value of the guide vanes and the drop value, with a view to increasing the yield characteristic depending on the flow rate, stabilizing operation with a partial load, and delaying the occurrence of cavitation on the blades of the wheel of the turbine engine. |
