Supporting structure of passive wind facing fan without yaw system, and wind generating set

Abstract

The invention discloses a supporting structure of a passive wind facing fan without a yaw system, and a wind generating set. The supporting structure comprises a tower frame system, a running wheel system and a circular guide rail. The tower frame system comprises a first tower frame, a second tower frame, a third tower frame and a fourth tower frame. The bottoms of the first tower frame, the second tower frame and the third tower frame are connected with the circular guide rail through the running wheel system, the tops of the first tower frame, the second tower frame and the third tower frame are connected with one another to form a bottom tower frame, the fourth tower frame is connected with the top end of the bottom tower frame, the radian between the bottom ends of the first tower frame and the second tower frame is smaller than pi, and projections of the top ends of the first tower frame, the second tower frame and the third tower frame are positioned on the diameter of the circular guide rail. The wind energy utilization rate and the equivalent annual power generation hours in land low-wind-speed regions are increased. A downwind fan without a yaw bearing is adopted, the rigidity and frequency of the whole supporting structure are improved, and the weight of the supporting structure is reduced. The center height of a hub of the tower and the diameter of a wind wheel are increased while the clearance of the tower is ensured.

Description

technical field [0001] The invention belongs to the field of wind power generators and supporting structures, and in particular relates to a support structure for a non-yaw bearing passively facing a wind turbine and a wind power generator. Background technique [0002] In land areas with low wind speed, in order to obtain greater wind energy resources, wind turbines usually adopt the support structure scheme of mixed towers or soft towers. Currently, the maximum height in China is about 160m. However, as the capacity of the wind turbine and the diameter of the wind rotor increase, the requirement for the height of the tower becomes higher and higher. The first-order frequency at the rated speed of the impeller is called 1P; when the frequency of the tower itself is above the first-order frequency of the impeller, it is a traditional tower, and if it is below the first-order frequency, it is a soft tower. [0003] The upper part of the steel-concrete tower is a steel tower ...

AI Technical Summary

Problems solved by technology

[0004] When using a mixed tower, there are problems such as difficult control of the precision of the prefabricated concrete formwork, stress concentration at the connection between the lower concrete and the upper steel tower, and high cost of prestressed steel bars; in the process of using a soft tower, the frequency of the overall support structure is small, and vortex is easy to occur Excited vibration, heavy tower weight and other issues

[0005] When the top of the tower is affected by the extreme weather environment, the fan shakes a lot. If the yaw system is installed, the load of the yaw system will be very large; the high altitude in the field is often attacked by sandstorms and condensed water corrosion, which will inevitably lead to early failure of the seal. At the same time, the operation and maintenance of high towers in the wild is difficult and expensive. Once the wind turbine yaw system is damaged, it is difficult to repair and the cost is high.

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