Generator assembly tooling and assembly method

Abstract

Provided are an assembly tool and an assembly method for a generator. One of a rotor and a stator of the generator serves as a sleeved member, and the other one serves as a sleeving member. The assembly tool comprises: a limiting device arranged around a pre-determined axis and defining an assembly space on a side that faces the pre-determined axis, the limiting device having a guide face facing the assembly space and extending along the pre-determined axis; and a servo guide device comprising a connecting portion and a first abutting portion connected to the connecting portion, wherein when the servo guide device is connected to the sleeving member by means of the connecting portion, the first abutting portion can extend to the outside of the sleeving member in a radial direction of the sleeving member, wherein the first abutting portion can abut against the guide face and move along the guide face, such that an air gap between the sleeving member and the sleeved member is kept constant. Therefore, during assisting in the sleeving of the sleeving member on the sleeved member, the assembly tool of the embodiments of the disclosure can ensure the uniformity of the air gap between the sleeving member and the sleeved member, thereby preventing the sleeving member from deformation which even results in damage to a rotor magnetic pole and a stator core.

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...

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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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