Processing method of NdFeB permanent magnet temperature compensation component for wind power generator or permanent magnet motor

Abstract

The invention discloses a method for machining a neodymium-iron-boron permanent magnet temperature compensation component for a wind driven generator or a permanent magnet motor. The method comprises the steps that a metal plate is cut well according to the size of a permanent magnet to be wrapped, and then the metal plate is stamped and stretched according to the outer contour shape of the permanent magnet to form a metal shell fitting the outer contour of the permanent magnet; the metal shell is buckled to the outer contour of the permanent magnet and placed in a vacuum environment with the vacuum degree less than or equal to 1 KPa, a permanent magnet workpiece is clamped, and a cold welding machine is used for conducting cold welding on joint gaps of the metal shell; the metal shell is pressurized at a normal temperature after being welded, the pressure is larger than or equal to 280 KPa, the sealing degree of a combined magnet is detected, and after welding is qualified, a flat-stone mill is used for rubbing away welding marks of the combined magnet so that the required dimensions can be obtained; finally, polishing, cleaning and packaging are carried out. The method has the advantages that the magnetic stability of the permanent magnet can be guaranteed effectively in a high-temperature environment, and it can be guaranteed that the magnetism of the permanent magnet does not drop in the high-temperature environment so as to maintain the continuous power generation capacity of the wind driven generator; moreover, the environmental pollution is little, machining is simple, and the cost is lowered.

Description

technical field [0001] The invention relates to the technical field of wind power generators, in particular to a processing method for a temperature compensation component of an NdFeB permanent magnet used in a wind power generator or a permanent magnet motor. Background technique [0002] The NdFeB permanent magnets used in wind turbines or permanent magnet motors are required to have good magnetic stability due to the harsh environment of use, and they will not demagnetize in high temperature environments to maintain the continuous power generation capacity of wind turbines. [0003] For the permanent magnets in the prior art, due to the long-term power generation process, the temperature will gradually increase, even to a high temperature of 80-100°C. The permanent magnets currently used in such a high-temperature environment have a large decrease in magnetic properties, so that Seriously affect the stability of wind turbine operation and reduce power generation. [0004...

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Problems solved by technology

[0003] For the permanent magnets in the prior art, due to the long-term power generation process, the temperature will gradually increase, even to a high temperature of 80-100°C. The permanent magnets currently used in such a high-temperature environment have a large decrease in magnetic properties, so that Seriously affect the stability of wind turbine operation and reduce power generation

[0004] In addition, the NdFeB permanent magnets currently used in wind turbines are often coated with a single metal layer on the outer surface of the NdFeB permanent magnets as a protective layer by electrochemical plating to prevent corrosion or scratches on the surface of the permanent magnets. , but this process often has the following shortcomings: 1. Due to the large pollution in the chemical plating process and the easy discharge of waste liquid containing heavy metals, it has a huge impact and damage to the environment; 2. The chemical plating process consumes a lot of electricity and energy. The production cost is greatly improved; 3. Since the outer surface of the NdFeB permanent magnet is coated with a metal protective layer, the hardness and strength of the metal protective layer are not ideal, and it is easy to cause surface scratches. , it is necessary to repeat electroplating or remove the electroplating layer and then rework and reprocess. The whole process is complicated and difficult to handle, which greatly increases the cost of the enterprise.

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