Double-stator wind driven generator with pivotal bearing supporting middle rotor

Abstract

The invention discloses a double-stator wind driven generator with a pivotal bearing supporting a middle rotor. The generator comprises an outer stator, an inner stator and the rotor arranged between the outer stator and the inner stator. The generator is simple in structure, radial load of a center shaft is reduced, and good heat dissipation and cooling effects of the inner stator are guaranteed.

Description

technical field [0001] The invention relates to the field of wind power generation equipment, and more specifically relates to a double-stator wind power generator in which a slewing bearing supports an intermediate rotor. Background technique [0002] As the single unit capacity of wind power generators increases, the volume and weight of the generators will increase accordingly. When the power is greater than megawatts or more than several megawatts, its volume will become quite large, so that it will bring difficulties to transportation and installation. In view of the above problems, the wind power generator can adopt a double stator structure to increase the output per unit volume of the motor, thereby reducing the volume and weight of the motor. [0003] Traditional double-stator wind turbine structures are generally divided into two types: concentric structure and parallel structure. The double-stator wind turbine with parallel structure means that two stators are p...

AI Technical Summary

Problems solved by technology

The double-stator wind turbine with parallel structure means that two stators are placed in parallel. The disadvantage of this design structure is that the shaft system is longer, and the shaft deflection, deformation and external overturning load have a greater impact on the shaft system;

[0004] For the rotor of the double-stator wind turbine with a concentric structure, its two ends are fixed on the central shaft through the front and rear end covers of the rotor. The outer stator and the inner stator are respectively arranged on the outer and inner circumferences of the rotor. The total weight of the rotor will cause greater fatigue of the central shaft, prone to deflection deformation and fatigue damage, and indirectly cause the error of the air gap between the rotor and the stator to become larger, thereby affecting the performance and normal operation of the generator

[0005] The internal stator of the double-stator wind turbine has a compact structure, which increases the difficulty of heat dissipation and winding wiring, and requires more wiring space and cooling system piping space; the traditional double-stator wind turbine generally supports the stator and the rotor at the same time on the central shaft , so that the winding wiring of the inner stator and the piping of the cooling system can only pass through the hollow passage of the central shaft, and the wiring and piping passages are cramped, causing great difficulties for installation and construction

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