Fan and tower tube thereof

Abstract

The invention discloses a fan and a tower tube thereof. A vibration attenuation mechanism in the disclosed tower tube comprises a connecting rod mechanism and a vibration attenuation damping component, wherein the connecting rod mechanism comprises a first connecting rod and a second connecting rod which are hinged with each other; the first connecting rod is hinged to the position of the first hinge joint of a tube wall; the second connecting rod and the tube wall are hinged to a second hinge joint; and both ends of the vibration attenuation damping component are respectively hinged to the tube wall and the first connecting rod and / or the second connecting rod. The relative positions of the first connecting rod and the second connecting rod in the tower tube are respectively changed in the deformation process of the tower tube, and then, the length of a hydraulic viscous damper can be changed, and the setting of the connecting rod mechanism can be deduced by a cosine law formula, so that the deformation length of the hydraulic viscous damper is amplified relative to the displacement of the tower tube, and the response speed of the hydraulic viscous damper to the deformation vibration of the tower tube is accelerated. Moreover, the damping ratio is increased manyfold, and further, a better vibration attenuation effect is obtained. Moreover, the construction of the vibration attenuation mechanism is simple, and thus, the weight of the fan is hardly increased.

Description

technical field [0001] The invention relates to the technical field of towering structures, in particular to a fan and its tower. Background technique [0002] A wind turbine generally includes a tower, a nacelle and blades, and the tower is fixed on the base to support the nacelle and the blades. With the continuous increase of the power generated by wind turbines, the height of the wind turbine tower is also increasing. The tower not only supports the nacelle and blades, but also needs to withstand the huge bending moment generated by external forces such as wind load. In addition, factors such as blade quality imbalance, wind force, tower shadow effect, and fan transmission chains may cause tower vibration, which affects the safety performance of the tower. Therefore, the tower has a good vibration reduction function and improves the tower. The safety factor is more important. [0003] In the prior art, there is a technical solution of using a mass damper to reduce the...

AI Technical Summary

Problems solved by technology

To achieve a better vibration reduction effect, the quality of the mass damper needs to account for about 3% of the mass of the entire fan. The mass of the fan is generally about 200 tons, and the weight of the mass block will be as high as 6 tons. The quality block is made into a large mass block, and the mass block and its operating mechanism must be installed on the top of the fan, and the space at the top of the tower is limited, so it is difficult to meet the installation of a larger mass block; and the larger mass block increases The weight of the fan and the cost of production are reduced, and the sliding of the mass block will also affect the personal safety of the operator

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