Wind wheel with variable blades and attack angles

Abstract

The invention discloses a blade and a wind wheel with the variable blades and attack angles. Wind energy does not need fuels, is economical and environmentally friendly, and is widely applied to places all round the world. With energy shortage and pollution caused by fossil fuels to environment gradually becoming serious, developing of new energy becomes the key of development of economy of each country. Wind power generation is a power-generating mode with the mature technology so far and a long history, and is a renewable energy source with large-scale development potential. The blade and the wind wheel with the variable blades and attack angles solves the problems that an existing wind wheel cannot be started easily at low wind speed, is unstable in low power and small in high-wind speed application range. The wind wheel with the variable blades and attack angles comprises the primary blade, the auxiliary blade, a blade connecting shaft, an elastic device between the blades, a permanent magnet, a support and a main shaft. One end of the main blade and one end of the auxiliary blade are connected with each other through the blade connecting shaft, the main blade and the auxiliary blade rotate by using the blade connecting shaft as the center, the permanent magnet is fixed to one movable end of the main blade and / or the auxiliary blade, one end of the support is movably connected with the main blade, the auxiliary blade is arranged at one side , facing the main shaft, of the main blade, and the other end of the support is connected with the main shaft.

Description

technical field [0001] The invention relates to the field of wind energy utilization, in particular to a blade and a variable angle of attack wind wheel. technical background [0002] Wind energy does not require fuel, is economical and environmentally friendly, and is widely used around the world. With energy shortages and environmental pollution from fossil fuels becoming increasingly serious, the development of new energy has become the key to economic development in various countries. Wind power generation is a relatively mature technology with a long history. The power generation method is a renewable energy with large-scale development potential, and may become an important alternative energy source. Wind power generators mainly include horizontal-axis fans and vertical-axis fans. The wind rotor axis of the vertical-axis fan is perpendicular to the wind direction. The rotation of the wind turbine has nothing to do with the wind direction, but due to its high starting w...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a variable wind rotor with blades and angle of attack, so that the existing wind rotors can solve the problems of difficulty in starting at low wind speed, low efficiency, low power instability and small adaptation range at high wind speed

Images