Automatic concentric structure for vertical axis wind turbines

Abstract

The invention relates to an automatic concentricity structure applicable to a vertical-axis wind turbine. The automatic concentricity structure comprises a tubular center shaft. The main body section of the center shaft is cylindrical. An upper-bearing connecting shaft is inserted to the top end of the center shaft. The upper portion of the upper-bearing connecting shaft extends to the outside of the center shaft, and an upper-bearing positioning end face, an upper-bearing connecting section and an upper-thread connecting section are sequentially arranged on the upper portion of the upper-bearing connecting shaft form bottom to top. An upper bearing sleeves the upper-bearing connecting section, an upper nut is screwed to the upper-thread connecting section, an upper bearing sleeve sleeves the upper bearing, the upper bearing sleeve is fixedly connected with an outer ring of the upper bearing, and one or more annular grooves used for embedding O-shaped rings are formed in the outer side face of the upper bearing sleeve. By the automatic concentricity structure, requirements on flexibility and rigidity of connection between the upper end of the center shaft and an optionally mounted member are taken into consideration, so that relative fixation of the center shaft and automatic concentricity of a rotating member are guaranteed during operation, and negative impacts on the center shaft due to fan blade rotation are reduced or avoided.

Description

technical field [0001] The invention relates to an automatic concentric structure suitable for vertical-axis wind power generators, mainly used for vertical-axis external rotor wind power generators. Background technique [0002] Rigid connections are used between the rotating components and the fixed components of existing vertical axis wind turbines, and the wind rotor is fixedly installed on the main shaft or transmission shaft. Tight connection, there can be no relative displacement between the connecting rod of the wind wheel or the wind wheel and the main shaft or the transmission shaft. The resonance of the transmission shaft, especially when developing a large vertical axis wind turbine, the weight of the wind wheel will be very large, the vibration caused by it is also very strong, and the damage to the wind turbine is also great. A new type of design is to put a tubular casing on the fixed central shaft (main shaft), and the fan blades and the outer rotor of the g...

AI Technical Summary

Problems solved by technology

[0002] Rigid connections are used between the rotating components and the fixed components of existing vertical axis wind turbines, and the wind rotor is fixedly installed on the main shaft or transmission shaft. Tight connection, there can be no relative displacement between the connecting rod of the wind wheel or the wind wheel and the main shaft or the transmission shaft. The resonance of the transmission shaft, especially when developing a large vertical axis wind turbine, the weight of the wind wheel will be very large, the vibration caused by it is also very strong, and the damage to the wind turbine is also great

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