Vertical axis wind turbine with double-arm double-triangular-structure fan blades

Abstract

The invention discloses the technology of ultra-large type vertical axis wind turbine units. A turbine is an ultra-large type unit of 10MW level or the level of power above 10MW. From the perspective of structural mechanics, two-blade single arm Aerogenerator X design of the Arup company in the England is changed into double-triangle connecting design of two-blade double arms, blade stress and deformation generated by blade gravity and wind thrust can be overcome, the special high rigid structure is achieved, the structural strength is improved sufficiently to increase cut-out wind speed, and the generating capacity is increased; secondarily, through the increased complementary capacity of a Savonius turbine, starting torque can be increased, and the driving torque is made to be more stable, so that the unit output power is further increased. The wind turbine becomes the vertical axis wind turbine unit integrated with the latest technology at home and abroad, the maximum output power and the quite high industrialization implementation degree, and the double-arm double-triangle fan blade structure is also suitable for kW level wind driven generators.

Description

technical field [0001] The invention belongs to the technical field of power machinery, and specifically proposes a composite vertical axis wind turbine device with a new structure. Background technique [0002] A wind turbine (hereinafter also referred to as a wind turbine or fan for short) is a renewable energy power device that converts the kinetic energy of the wind into mechanical energy suitable for the shaft energy of the generator, and then drives the generator to rotate to generate electricity. In the whole process of wind power generation, the capacity of the turbine is the first important one. In the existing widely used horizontal-axis turbines, industry practice has proved that the increase in the power of a single machine is beneficial to reduce the cost of installed capacity per unit power and the cost of wind power generation. Therefore, the rated power capacity of a single machine continues to increase, and the single-machine power of horizontal axis turbin...

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Problems solved by technology

[0006] 3. In addition, due to the insufficient self-starting capability of the Darrieus vertical axis turbine, additional starting devices must be considered, especially at low wind speeds, and when the central axis of the blades of the two-blade Darrieus turbine is parallel to the wind direction, the torque is zero , even if the wind speed is very high, it is impossible to start; although the cost of the two-blade Darrieux turbine is lower than that of the three-blade or multi-blade turbine, but in the whole 360° rotation process of the fan, the rotational torque generated by the wind energy drive fluctuates very seriously. It is smoothed by the huge inertia of the unit, but it will still cause a corresponding change in the output power of the generator, which will directly affect the power quality

[0007] 4. Chinese Invention Patent Application 201310749991.9 "Improved Super Large Vertical Axis Wind Turbine Generator System" is an improved design of Faint's large 10MW vertical axis, but in the process of optimizing the new design, the improved design was discovered The main shaft is still too long, and there is still the possibility of shortening; and the improved design of the blades is not enough to resist the stress and deformation caused by the wind thrust, and there is still room for improvement in the structure and economy of the turbine.

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