Shaft-less direct-drive generator for wind power generation

Abstract

The invention discloses a shaft-less direct-drive generator for wind power generation, and belongs to the technical field of wind power. The shaft-less direct-drive generator for the wind power generation can realize that on the basis of discarding a conventional direct drive shafting structure, through a synchronous drive effect of a triplex-row roller combination turntable bearing, the rotationof a wind wheel assembly is transferred directly to a rotor, not only can cost and quality be reduced, meanwhile, the cost of per kilowatt of the wind power generation can be reduced, the shaft-less direct-drive generator has good economic benefit and social benefit, meanwhile, a magnetostrictive displacement sensor is applied to carry out displacement monitoring on the turntable bearing, then inner and outer ring matching errors of the turntable bearing are obtained, and an outer ring adjustment value of the turntable bearing is analyzed and calculated based on a data processing mode, so thatthe inner ring deviation of the turntable bearing is compensated, high-precision cooperation of the new error range or within is achieved, and a stator is locked after adjustment by adopting a regenerative connection mode, so that the stability and the safety of the self-adjusted generator are realized.

Description

technical field [0001] The invention relates to the technical field of wind power, and more specifically, relates to a direct drive generator without a main shaft for wind power generation. Background technique [0002] A wind turbine is a power device that converts wind energy into mechanical work, which drives the rotor to rotate, and finally outputs alternating current. Wind turbines are generally composed of components such as wind rotors, generators (including devices), steering devices (tail fins), towers, speed-limiting safety mechanisms, and energy storage devices. [0003] The working principle of a wind turbine is relatively simple. The wind rotor rotates under the action of the wind, which converts the kinetic energy of the wind into the mechanical energy of the wind rotor shaft, and the generator rotates to generate electricity under the drive of the wind rotor shaft. In a broad sense, wind energy is also solar energy, so it can also be said that a wind generato...

AI Technical Summary

Problems solved by technology

In addition, this kind of shaft system requires the bearing to have a negative clearance in the axial direction. During assembly, it is necessary to match the adjustment pad or use it as a gland to meet the requirements, resulting in low production efficiency and high quality risks.

Due to the complex structure of the parts, the weight of the main shaft and the bearing seat is relatively large, resulting in a large weight and high cost of the whole machine

[0005] In view of this, the shaftless direct drive generator came into being. The rotation of the rotor is synchronized with the fan blades through the bearing, which can not only reduce the cost and quality, but also reduce the cost of wind power generation, which has good economic benefits and social benefits. benefit and contribute to the further promotion of wind power generation, but the characteristic of the direct-drive generator without a main shaft is to remove the main shaft under pressure and replace it with a synchronous transmission of the bearing, so the transmission pressure of the bearing is relatively high, and the good operation of the bearing determines the The precision of the fit between the stator and the rotor is the result of power generation efficiency, and even the normal operation of the entire wind power generation system. In actual situations, due to long-term pressure, man-made or natural accidents, the radial error of the bearing will occur. After the radial error, the wear will further increase, which will lead to the scrapping of the bearing and the paralysis of the power generation system

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