| 摘要 |
A dual rotor arrangement 100 for a wind or water turbine has a planetary gearbox with two inputs 3, 5 and an output 9. One rotor 1 is connected to one of the inputs, which may be the ring gear and the other rotor 8 is connected to the other input, which may be the planet carrier of the epicyclical gear arrangement. A generator is connected to the output, which may be the sun gear via a shaft 11. The rotational speed of the output is determined by the relative rotational speeds of the rotors. Preferably one rotor is located upstream of the other and is of a smaller diameter. One or both of the rotors may have variable pitch blades to control the rotational speed, in some operating conditions the rotors may rotate in the same direction, in other conditions the blades may counter rotate. |
