Magnetic pole module fixing device, rotor comprising same and permanent magnet wind driven generator

Abstract

The invention discloses a magnetic pole module fixing device, a rotor comprising the same and a permanent magnet wind driven generator, the magnetic pole module fixing device comprises a convex part and a first concave part, and the convex part and the first concave part are respectively arranged on the side surfaces, facing each other, of two adjacent magnetic pole modules along the circumferential direction of the rotor; the protruding part comprises a boss protruding outwards from the circumferential side face of the magnetic pole module, and the first sunken part comprises a groove sunken inwards from the circumferential side face, away from the corresponding magnetic pole module, of the first sunken part. For two adjacent magnetic pole modules in the circumferential direction of the rotor, the boss of one magnetic pole module is clamped with the groove of the other magnetic pole module. Movement of the magnetic pole modules in the radial direction of the rotor is limited through mutual restraining of the two adjacent magnetic pole modules in the circumferential direction of the rotor, no special requirement for the shape of the magnetic pole module fixing groove exists, the magnetic pole module fixing groove can be in the shape easy to machine, and therefore the machining difficulty and cost of the magnetic pole module fixing groove are reduced.

Description

technical field [0001] The invention relates to the field of wind power generation, in particular to a magnetic pole module fixing device, a rotor including the same, and a permanent magnet wind generator. Background technique [0002] The operating environment of wind turbines is often a high-humidity and high-salt environment, especially offshore wind turbines, where the operating conditions are relatively harsh. ) and the base plate made of metal magnetic conductive material (low carbon steel plate) to form a magnetic pole module. [0003] The rotor magnets of the outer rotor permanent magnet direct drive wind turbine are mostly fixed on the yoke surface of the inner wall of the rotor by surface-mounting. A method, specifically machining a plurality of T-slots on the inner wall of the rotor, and implementing the magnetic pole module into a shape that matches the T-slots, the T-slots extend from the brake disc side of the rotor to the hub side, and terminate at At a dist...

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Problems solved by technology

[0004] In the above method, the T-shaped slot needs to be processed on the inner surface of the rotor house. Due to the large diameter of the rotor house, it needs to be processed by a large-scale high-precision CNC gantry turning and milling compound machine tool, and the processing of the T-shaped slot is relatively difficult. And high precision, occupying a long time machine tool, high cost

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