Heavy wind-resistant expandable cable-tower wind driven generator

Abstract

The invention discloses a heavy wind-resistant expandable cable-tower wind driven generator, which comprises a fan impeller, a fan hub, a fan cabin, a fan tower barrel, a base ring, a fan foundation and a plurality of cable devices, wherein the fan impeller is connected with the cabin through the hub; the cabin is arranged on the top of the fan tower barrel; the fan tower barrel is connected withthe fan foundation through the base ring; and the cable devices are uniformly arranged around the periphery of the fan tower barrel and are connected with the base ring through the fan tower barrel respectively. Cables are retracted under normal running condition, so that normal operation of a fan is not influenced. In case of heavy wind, the fan generally needs braking and stopping, so that the heavy wind resistance of the fan tower barrel can be enhanced remarkably by expanding cable structures. Calculation performed on a sample machine indicates that indexes such as horizontal displacementof the expandable cable-tower fan hub, the equivalent stress value of the bottom surface of the tower barrel, the least single-pile axial force change amplitudes of a high-stress area and a windward surface and the like are remarkably smaller than those of the conventional tower barrel fan.

Description

technical field [0001] The invention belongs to the fields of wind power generation and new energy, and in particular relates to an expandable cable-tower wind power generator resistant to strong winds. Background technique [0002] In recent years, wind power has developed rapidly, and a large number of large wind farms have been built. The existing wind power generation structure consists of two parts: the ground structure (that is, the wind power generation device) and the foundation. For horizontal axis wind turbines, the ground structure mainly includes three parts: impeller and hub, nacelle, and tower. Due to the different bending moment loads and stress levels on the tower sections of different heights, the general wind turbine tower adopts the form of variable wall thickness and variable diameter, and the segmented towers are connected by high-strength bolts. Wind turbine foundations mainly include pile foundations and shallow foundations. [0003] The existing wi...

AI Technical Summary

Problems solved by technology

If a fixed cable structure is still installed around the fan tower, these cables will affect the operation of the fan impeller, and even accidents where the cables collide with the rotating impeller

However, if the height of the connection point between the cable and the tower is reduced, for example, if the cable is installed at the bottom of the tower and outside the range affected by the impeller rotation, the anti-overturning force that the cable can provide is very limited, and the effect of the cable cannot be fully utilized.

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