Riveted multi-block type magnetic steel assembly structure and mounting method therefor

Abstract

The invention discloses a riveted multi-block type magnetic steel assembly structure and a mounting method therefor. The magnetic steel assembly structure comprises a protection cover, multiple pieces of magnetic steel, and a magnetic conductive bottom plate, wherein the protection cover is made from a non-magnetic-conductive material; a turned edge is arranged on the edge of the protection cover; two lug bosses are arranged on the edge of the upper surface of the magnetic conductive bottom plate; the multiple pieces of the magnetic steel are mounted between the upper surface of the magnetic conductive bottom plate and the two lug bosses in parallel; a layer of gridding cloth is arranged between the magnetic steel and the magnetic conductive bottom plate; the multiple pieces of the magnetic steel are covered with the protection cover; and the turned edge is fixed on the magnetic conductive bottom plate through rivets. The invention reasonably and creatively provides the magnetic steel assembly structure; the toothed slot torque and the torque pulsation of the generator are effectively lowered by adopting a step skewing manner; the structure is convenient to produce and manufacture in large batch, and easy to mount; and in addition, the invention provides a reliable design scheme capable of improving the corrosion resistance of the permanent magnet, and the requirement on the designed service life of the generator can be satisfied.

Description

technical field [0001] The invention relates to the field of permanent magnet direct drive generator rotors, in particular to a surface-mounted riveted multi-block magnetic steel component structure of an outer rotor and an installation method thereof. Background technique [0002] As the most mature power generation segment in the new energy industry, the wind power industry is growing at an alarming rate. In recent years, in the domestic wind power market, the single-unit capacity of wind turbines has continued to increase, and the utilization efficiency has continued to improve. The domestic mainstream models have increased from 750kW-850kW in 2005 to more than 1.5MW in recent years. The unit has few failures, reliable operation and low maintenance cost, and is gradually favored by the wind power market. [0003] Direct-drive wind turbines are directly exposed to the outdoors, so there are higher requirements for their mechanical strength and magnetic pole anti-corrosion...

AI Technical Summary

Problems solved by technology

[0004] The problem in the prior art is that when the direct-drive wind turbine is running, the rotor poles are subjected to unilateral magnetic tension and loads in all directions, resulting in compression or tensile deformation of the rotor poles; Permanent magnets pose corrosion threat, shortening generator life

[0005] At present, the magnetic poles of the outer rotor are generally surface-mounted, and the permanent magnets are directly installed on the surface of the rotor shell, and the exterior is sealed and fixed with glue. This installation method is difficult to install and the cost is high

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