| 摘要 |
A wind-powered heating device comprises a rotor 1 having a horizontal section formed of aerofoil blades 4 with foils 5 mounted on their ends. The rotor drives a hydraulic friction heater 2 through a shaft 3. The rotary element 6 in the heater 2 is constructed such that the power required to drive it increases with speed to such an extent that it has a sufficient braking effect on the rotor to prevent excessive speeds which might lead to failure of the device. The rotary element 6 has arms 9 which spread out under the action of centrifugal force during rotation, the arms 9 being resilient or being hinged at their upper ends. <IMAGE> |
