Assembly tool and assembly method of generator

Abstract

The invention provides an assembly tool and an assembly method of a generator. One of a stator and a rotor of the generator is adopted as a sleeved part, and the other one of the stator and the rotorof the generator is adopted as a sleeve part. The assembly tool comprises a limiting device arranged around a predetermined axis and used for defining an assembly space on one side facing the predetermined axis, and a follow-up guide device. The limiting device is provided with a guide surface which faces the assembly space and extends along the predetermined axis. The follow-up guide device comprises a connecting part and a first abutting part connected with the connecting part. When the follow-up guide device is connected with the sleeve part through the connecting part, the first abutting part can extend out of the outside of the sleeve part in the radial direction of the sleeve part. The first abutting part can abut against the guide surface and move along the guide surface, so that anair gap between the sleeve part and the sleeved part is kept constant. Therefore, when the assembly tool disclosed by the embodiment of the invention is used for facilitating the assembling process of the sleeve part and the sleeved part, the uniformity of the air gap between the sleeve part and the sleeved part can be ensured. The deformation of the sleeve part is avoided. Moreover, a rotor magnetic pole and a stator iron core are prevented from being damaged.

Description

technical field [0001] The invention relates to the technical field of generators, in particular to a generator assembly tool and an assembly method. Background technique [0002] A low-speed and large-diameter generator consists of a stator and a rotor, such as a permanent magnet generator in a wind turbine. For example, an outer rotor type generator, the rotor is coaxially sleeved outside the stator, and the rotor can surround the central axis of the stator rotate. The permanent magnets inside the rotor are evenly arranged along the circumference. Since these permanent magnets are usually made of NdFeB permanent magnet materials with good magnetic properties, and NdFeB magnets have strong magnetism, the rotor and stator are assembled During the process, when the rotor is close to the stator, under the action of the large adsorption force generated by the permanent magnet, the rotor and the stator core are easily attracted to each other and collide. If the necessary measu...

AI Technical Summary

Problems solved by technology

[0004] This method can assist the assembly of the stator and the rotor. At the same time, there are still some problems in this method. First, the yoke of the rotor is similar to a cantilever beam during the assembly process, and the yoke is always subjected to the force generated by the magnetic pole and the stator core. As the coincidence with the iron core increases, the force on the yoke gradually increases, so it may cause deformation of the rotor yoke

The second is that after the sliding sleeve is separated from the rotor, the rotating shaft needs to be installed. At this time, the rotor lacks fixed constraints, so the rotor and stator are also prone to adsorption

Moreover, after the magnetic poles and iron cores are damaged, because the follow-up repair work is more complicated and the reliability after repair is poor, it will bring economic losses while reducing the quality of the generator and reducing the service life of the generator

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