Vertical shaft fan of wind generating set

Abstract

The invention discloses a novel vertical-shaft fan structure of vertical shaft wind generating set, wherein the novel vertical-shaft structure is designed according to the unique blade operation characteristic of a vertical-shaft fan. In the invention, by virtue of the direct correlation among blades, a compact main shaft assembly, an installation mode and other construction, the availability factor of a wind wheel support part is exponentially improved, the power transmission paths of the blades are scattered, and the length of the arm of force of a transmission component is decreased, so that the stress uniformity is improved, the vibration source of the blades is removed, thus the intensity requirement of the wind wheel support part is exponentially reduced, and the intensity requirement of a hub and a main shaft is reduced at the same time, and the transportation and installation of the fan are convenient. Therefore, the fan structure in the invention has the advantages of small centrifugal load, light weight, easiness for installation, easiness for transport and low cost.

Description

technical field [0001] The invention belongs to the design and manufacturing technology of a fan (also known as a wind turbine) of a wind power generating set, in particular to the design and manufacturing technology of a fan of a vertical axis (also called a vertical axis) wind generating set. Background technique [0002] Reducing the power generation cost of wind power generators is one of the most critical issues in the development of wind power technology. In wind power generators, the cost of manufacturing, transportation and installation of fans accounts for 60-70% of the above-mentioned power generation costs. [0003] At present, the fans of wind power generating sets operating in the market are basically horizontal-axis turbine fans, which are high wind speed fans, and have low efficiency and poor performance at medium and low wind speeds. Secondly, horizontal axis wind turbines are noisy, produce infrasonic waves and obvious glare problems. Not only are they not s...

AI Technical Summary

Problems solved by technology

[0003] At present, the fans of wind turbines operating in the market are basically horizontal-axis turbine fans, which are high-wind speed fans, and have low efficiency and poor performance at medium and low wind speeds.

Secondly, horizontal axis wind turbines are noisy, produce infrasonic waves and obvious glare problems. Not only are they not suitable for use in cities and communities, but they also endanger the living environment of birds. Now some local governments in Europe and the United States have legislated to prohibit the installation of horizontal axis wind power. unit

Third, due to the structure of the horizontal-axis fan, there is no way to further reduce the cost of power generation except for the large-scale unit capacity; Due to the limited conditions of the tower operation and the high cost of transportation, installation and maintenance, the actual effect of reducing the cost of power generation by increasing the capacity of a single unit is very limited

The disadvantages of this structure are that the cantilever is heavy due to the high strength required, and the time efficiency of the cantilever is very low (the reason is that at a certain moment when the blade operates in relay mode, only the one connected to the output blade The cantilever bears the function of transmitting power, and the rest of the cantilever is idle in the transmission function, so the strength of each cantilever must reach the strength required to bear the torque of the entire wind wheel); second, the force uniformity of the wind wheel is poor, and the centrifugal The load is large, so the strength and weight required for the hub or the main shaft are high; the third is that the blades on the cantilever structure are easy to vibrate, which leads to further increase in the required strength and weight of the cantilever

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