Transmission main shaft of self-adaptive adjusting type permanent magnet suspension vertical axis wind turbine

Abstract

The invention discloses a transmission main shaft of a self-adaptive adjusting type permanent magnet suspension vertical axis wind turbine. The transmission main shaft mainly comprises an external sleeve vertical static shaft, an internal rotating transmission shaft, a radial two-degree-of-freedom full permanent magnet suspension bearing, an axial single-degree-of-freedom full permanent magnet suspension bearing and a radial magnetic force full-angle self-regulation mechanism, etc. The radial magnetic force full-angle self-regulation mechanism is installed on the external sleeve vertical static shaft, is always in a windward position, and can achieve the function of closed loop feedback self-regulation of the radial suspension magnetic force when the wind power changes, so that the internal rotating transmission shaft is basically kept unchanged with respect to a radial suspension air gap of the external sleeve static shaft. The transmission main shaft of the vertical axis wind turbine adopts the full permanent magnet suspension technology and a pure mechanical type automatic control mechanism, and has the advantages of simple structure, zero friction, zero electricity consumption, low cost and fault 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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