Vertical axis wind turbine drive shaft with self-balancing suspension structure

Abstract

The invention discloses a transmission spindle of a vertical axis wind turbine in a simple self-balancing suspension structure. The transmission spindle mainly comprises a vertical outer sleeve stationary axle, an internal rotation transmission axle, radial two-degree-of-freedom full permanent magnet suspension bearings, an axial single-degree-of-freedom full permanent magnet suspension bearing, a radial magnetic full angle self-adjustment mechanism and the like. The radial magnetic full angle self-adjustment mechanism is mounted on the vertical outer sleeve stationary axle, can be located in an upwind position all the time and realize a closed-loop feedback self-adjustment function of a radial suspension magnetic force when the wind power is changed, and allows a radial suspension air gap between the internal rotation transmission axle and the vertical outer sleeve stationary axle to be unchanged basically. The transmission spindle of the vertical axis wind turbine adopts a full permanent magnet suspension technology and a pure mechanical automatic control mechanism, and has the advantages of simple structure, no friction, no electric energy consumption, low cost and failure rate, high cost performance and the like.

Description

[0001] This application is a divisional application with application number: 201210364020.8, application date: 2012.9.26, and titled "Full Permanent Magnet Self-Balanced Suspension Vertical Axis Wind Turbine Drive Main Shaft". technical field [0002] The invention relates to the fields of vertical-axis wind turbines, magnetic levitation technology, and the like, and in particular to a transmission main shaft of a full-permanent magnetic self-balancing suspension vertical-axis wind turbine. Background technique [0003] Except for the establishment of experimental wind farms in a few areas of the world, vertical axis wind turbines have not yet been widely promoted, but their superior aerodynamic performance has attracted more and more attention from researchers in various countries. [0004] Low self-starting performance is one of the main disadvantages of vertical axis wind turbines. To improve the performance of vertical axis wind turbines, effective measures must be taken...

AI Technical Summary

Problems solved by technology

But its disadvantages are: the closed-loop feedback electronic control system is complex, the circuit hardware investment and operation and maintenance costs are high, the failure rate is high, and the long-term power consumption is large, and the total power consumption is large.

However, the existing literature seldom considers the constant air gap suspension characteristics of the suspended main shaft of the permanent magnetic levitation wind turbine under the wind disturbance. The magnitude of the wind force adaptively changes the magnitude of the magnetic force in the direction of the corresponding degree of freedom, which cannot guarantee the constant suspension air gap of the magnetic levitation spindle

This then leads to the eccentricity of the axis of the suspended main shaft, vibration and vibration of the main shaft, increasing the mechanical transmission loss connected to the generator, reducing the life of the generator, and increasing the mechanical instability of the wind power generation system

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