| 摘要 |
<p>A water turbine (10) has a plurality of mutiple bladed propellers (20) mounted along a rotatable shaft (14). The shaft (14) is axially mounted in a cylindrical housing (12). In one aspect of the invention, a plurality of flow diverters (22) are mounted on the housing (12) and extend between adjacent ones of the propellers (20). The flow diverters (22) serve to direct water flow (46) from one of the propellers substantially normal to a next adjacent propeller (20) in the direction of water flow (44) through the housing (12). In another aspect of the invention, the pitch of the turbine propeller blades (42) is adjustable, so that efficient performance of the turbine can be obtained under differing water rates flow, pressure heads, loads on the turbine and the like. In one form of the invention, the propeller(42) pitch adjustment is made automatically to maintain a predetermined rate of rotation for the shaft (14). This water turbine (10) is substantially smaller, lighter and lower cost to manufacture than prior art water turbines producing an equivalent output. It also provides relatively constant output over a wider range of operating conditions than prior art water turbines.</p> |
