Fan main shaft and vertical axis wind turbine

Abstract

The invention discloses a fan main shaft and a vertical axis wind turbine, which are convenient for adjusting the number and the positions of fan blades, low in comprehensive cost and high in production efficiency. The fan main shaft comprises a shaft body (30), wherein a plurality of groups of annular grooves (33) are formed in the side wall of the shaft body (30); the cross sections of the annular grooves (33) are T-shaped; a plurality of T-shaped bolts (70) are arranged in the annular grooves (33); a plurality of groups of fan blade brackets (60) are fixedly connected with the shaft body (30) through the T-shaped bolts (70) and are uniformly distributed along the circumferential direction; the fan blades (80) are fixedly connected with at least two fan blade brackets (60) along the longitudinal direction; and the number and the positions of the fan blades (80) can be adjusted by adjusting the number of the fan blade brackets (60) distributed along the circumferential direction and the positions of the fan blade brackets (60) along the annular grooves (33). The fan main shaft and the vertical axis wind turbine are widely applied to the field of wind power generation.

Description

technical field [0001] The invention relates to a fan main shaft; the invention also relates to a vertical axis wind power generator. Background technique [0002] Wind power is a kind of clean energy, and it is widely used in environments with abundant wind resources. Structurally, wind power generation equipment can be divided into: a horizontal axis wind power generation system in which the rotation axis of the wind wheel is parallel to the wind direction, and a vertical axis wind power generation system in which the rotation axis of the wind wheel is perpendicular to the ground or the direction of the airflow. At present, the horizontal axis wind power generation has been developed to 15 MW, the tower height exceeds 200 meters, and the impeller diameter exceeds 180 meters. This poses a huge challenge to the design, installation, maintenance and reliability of large-scale wind power generation. On land, the power increase of land wind turbines is limited due to the diffi...

AI Technical Summary

Problems solved by technology

One of the reasons why the existing vertical-axis high-power wind power generation systems are not as popular as horizontal-axis wind turbines is that the greater the power, the larger the blades, and the weight of the blades makes it difficult to enlarge the cantilever beam structure

Therefore, the efficiency of existing vertical axis wind turbines is relatively low

[0004] The traditional large-scale megawatt-level wind power generation system is mostly shaped with a horizontal axis. Due to the thrust requirements, its wind blades are required to be very large and long, generally about 30 to 50 meters. Vertical axis generators The axis of the wind turbine is the center of the circle with the length of the wind blade as the radius, plus the safe height of the blade tip of the wind blade from the ground, the generator tower should be built to a height of 50-70 meters, so the overall equipment height is basically more than 100 meters; and Due to the rotation of the wind blades, it poses a great safety hazard to birds and aircraft in the airspace, and poses a great threat to the ecological balance of the environment; in addition, due to structural problems, once any part of the system fails, the overall equipment will be damaged. Stopping the operation will not only cause the loss of power generation, but also the maintenance is very difficult and the operation and maintenance cost is very high

[0005] After the main shaft of the traditional wind turbine is connected to the blades, the position and quantity of the blades are fixed and cannot be moved. They can only be fixed one by one. Arbitrarily arrange fan blades on the fan shaft of the same specification, so it is difficult to realize the modular processing of the fan shaft, resulting in high cost and low production efficiency

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