| 摘要 |
A low head water turbine comprising a runner having a cylindrical outer surface extending between opposite ends and a plurality of similar blades having inner and outer sides extending to ends. The blades are evenly spaced about the surface of the runner and extend to the ends of the runner. The blades are similarly pivotably secured along their inner sides to the outer surface of the runner so as to pivot in the direction of rotation of the runner between closed position lying adjacent the outer surface of the runner and open position at an angle thereto. A housing having end walls and a rounded side wall extending therebetween, completely encases the runner and its blades. End walls of the housing are proximal to the ends of the runner. The runner is eccentrically mounted to the end walls of the housing for rotation about a horizontal axis so that the cylindrical outer surface of the runner is spaced closer to an upper portion of the housing side wall and farther from a lower portion. A water inlet opening is located in a lower, forward portion of the housing, below the axis of rotation of the runner. A water outlet opening is located in a lower, rearward portion of the housing. The blades are constructed and positioned so that, during operation of the turbine, the blades will be constricted by the side wall of the housing and thereby moved to closed position as they approach and pass the upper portion of the housing side wall, and will move,to open position under force of gravity, water and centrifugal force acting on them as they move below the axis of rotation of the runner to said lower position, all the time the housing side wall acting on the outer sides of the blades.
|
