Megawatt-stage vertical shaft wind power generator with adjustable attack angle

Abstract

The invention provides a megawatt-stage vertical shaft wind power generator with an adjustable attack angle. The vertical axis wind power generator comprises an electric power conversion device, a speed increasing box, a power generator, a variable pitch motor, a main vertical shaft, a cantilever cylinder, blade crossbeams, and blades with airfoils, wherein the cantilever cylinder is sleeved on the outer side of the main vertical shaft; the main vertical shaft is connected with the cantilever cylinder through a bearing; one end of each blade crossbeam is fixed on the cantilever cylinder, and blade autorotation devices are mounted at the other end of each blade crossbeam; a lightning rod is mounted at the top end of the main vertical shaft; an anemoscope is connected with an electronic control device; and the electronic control device controls the blade autorotation devices on each cantilever crossbeam, so as to enable the blades to adjust the windward angles according to a preset program and enable the power generator to be throughout in a state capable of producing the maximum torque. The starting wind speed is effectively reduced, and the wind energy utilization rate is increased.

Description

technical field [0001] The invention relates to a vertical-axis wind power generator, in particular to a blade rotation device applied to a vertical-axis wind power generator. Background technique [0002] A wind turbine, also known as a windmill, is an energy conversion device that converts wind energy into mechanical energy, electrical energy or thermal energy. According to the difference of the wind rotor axis, it can be divided into horizontal axis wind turbine and vertical axis wind turbine. The energy drive chain (ie wind wheel, main drive shaft, gearbox, generator) is in the horizontal direction, which is called a horizontal axis wind turbine. If the energy drive chain is in a vertical direction, it is called a vertical axis wind turbine. Vertical axis wind turbines can be divided into drag type and lift type. [0003] In the prior art, there are many public reports about generating devices utilizing wind energy, solar energy and their combination. However, the wi...

AI Technical Summary

Problems solved by technology

However, the wind rotor of a general vertical axis wind turbine adopts a lift type, the shape of the blade is complex, the manufacturing cost is high, the axis of the blade is parallel to the vertical axis, and the rotation of the wind rotor has nothing to do with the wind direction, so it does not need windward device

However, since the angle between the blade and the cantilever bracket is fixed, the size and direction of the driving torque generated by the blade is constantly changing, and a large resistance torque will also be generated at the same time. Therefore, the starting wind speed of the existing vertical axis wind turbine Large and low utilization rate of wind energy, poor environmental adaptability

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