Centrifugal Pitch Wind Turbine

Abstract

The invention relates to a centrifugal variable-pitch wind driven generator. The centrifugal variable-pitch wind driven generator comprises blades and a propeller hub. Centrifugal body sliding sleeves are arranged inside the blades, are integrally connected with the blades and are in the shapes of hollow pipes. Centrifugal bodies are installed inside the centrifugal body sliding sleeves and are connected with the blades through threads, lever swinging arm devices or steel wire pulley devices. Because the centrifugal body sliding sleeves are installed inside the blades, the centrifugal bodies can conveniently slide in the blades, and the blades can be made big due to stability and safety. Being installed inside the blades, the centrifugal bodies can be arranged close to the outside as far as possible without generating noise or resistance. Because the centrifugal bodies are close to tips of the blades, the centrifugal bodies with small weights can generate large centrifugal variable-pitch force, wherein pitch angles can reach 90 degrees. The centrifugal variable-pitch wind driven generator can adapt to all kinds of wind speeds, is low in rotating speed, does less harm to birds and accords with the environmental protection concept. The centrifugal variable-pitch wind driven generator is simple in structure, low in cost, flexible in pitch changing, and strong in gust-resisting ability.

Description

technical field [0001] The invention relates to a wind-driven generator, in particular to a centrifugal variable-pitch wind-driven generator in which a centrifugal body is hidden in blades. technical background [0002] Wind power is an inexhaustible source of clean energy, and the megawatt-level ones are well established, while small and medium-sized ones still need to be perfected. Centrifugal pitching is used for stable operation and simple structure. There are currently three forms of centrifugal pitching: one is to use the whole blade as a centrifugal object, and the blade is installed in the spiral groove, and the blade rotates while sliding outwards. Its shortcoming is that the blade is too heavy as a centrifugal object, and once the blade is out of sync, it will vibrate greatly. The other is to install a centrifugal block in the propeller hub. The blades only rotate and do not slide outward, which is safe. However, since the centrifugal block is close to the center,...

AI Technical Summary

Problems solved by technology

Centrifugal pitching is used for stable operation and simple structure. There are currently three forms of centrifugal pitching: one is to use the whole blade as a centrifugal object, and the blade is installed in the spiral groove, and the blade rotates while sliding outwards. Its disadvantage is that the blade is too heavy as a centrifugal object, and once the blade is out of sync, it will vibrate greatly

The other is to install a centrifugal block in the propeller hub, the blades only rotate and do not slide outwards, which is safe, but since the centrifugal block is close to the center, a higher speed is required to generate centrifugal pitch force, so it cannot be made larger

There is also a way to install the centrifugal rod outside the propeller hub, the centrifugal force obtained by the centrifugal rod increases, and the wind turbine can be made larger, but the centrifugal rod will generate resistance and noise, and the speed is still faster than other pitch types with the same power The speed is high, which is harmful to birds and unfavorable to environmental protection

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