Vertical-axis wind turbine

Abstract

The invention relates to a wind turbine, in particular to a vertical-axis wind turbine mainly comprising a vertical axis (8) perpendicular to the ground, a generator (7), wheel hubs (5) and (6) and vanes, wherein a fixed-wing type straight vane (1) is parallel to the vertical axis and equidistantly distributed around the vertical axis; the wheel hubs (5) and (6) are connected with the straight vane (1) by a fixed-wing type supporting vane (2) and an inclined-pulling vane (3) forming a certain included angle with the horizontal direction and generating elevating force to provide rotating torque; and the supporting vane (2) and the inclined-pulling vane (3) rotate round a fixed supporting axis (9) thereof for a determined angle, thus automatically changing the propeller pitch as the wind speed varies. By turning the original supporting arm for generating air resistance into the vane for generating the elevating force to provide the rotating torque, the invention increases the rotating torque and wind-swept area of the wind turbine and increase the generated power thereof; for the supporting vane (2), the inclined-pulling vane (3) and a cantilever vane (4) serve the function of automatically changing the propeller pitch, the invention solves the difficult problem that the high-power elevating-type vertical-axis wind turbine is incapable of automatically starting up at a low wind speed, widens the range of wind speed, to which the vertical-axis wind turbine is applicable, and increases the power output of the vertical-axis wind turbine.

Description

technical field [0001] The invention relates to a wind power generator, in particular to a vertical axis wind power generator. Background technique [0002] There are two types of wind turbines: horizontal axis and vertical axis. The rotation axis of the horizontal axis wind turbine is parallel to the ground, and the blades rotate against the wind. Small horizontal axis wind turbines make a lot of noise when rotating, which affects people's normal rest. The manufacture of large horizontal axis wind turbines is complicated, and the price of a single machine is high, which affects the grid-connected electricity price. The rotation axis of the vertical axis wind turbine is perpendicular to the ground, and there are two types: drag type and lift type. The resistance type wind turbine has good starting performance, but low power generation efficiency, and the lift type wind turbine has high power generation efficiency, but poor start-up performance. In the connection technology...

AI Technical Summary

Problems solved by technology

Small horizontal axis wind turbines are noisy when rotating, which affects people's normal rest

The manufacture of large horizontal axis wind turbines is complicated, and the price of a single machine is high, which affects the grid-connected electricity price

The rotation axis of the vertical axis wind turbine is perpendicular to the ground, and there are two types: drag type and lift type. The resistance type wind turbine has good starting performance, but low power generation efficiency, and the lift type wind turbine has high power generation efficiency, but poor start-up performance

In the connection technology between blades and hubs of vertical axis wind turbines, some streamlined structural connections are only used to reduce air resistance and facilitate positioning and installation. The effect is only to reduce air resistance without increasing rotational torque.

Images