Process method for accurately controlling gluing amount of U-shaped groove lining of stator wire bar

Abstract

The invention discloses a process method for accurately controlling the gluing amount of a U-shaped groove lining of a stator wire bar, and aims to solve the problems that a gap between a stator wirebar and a stator iron core groove cannot be effectively filled, or excessive glue overflows to cause waste and generate extra cleaning work since the gluing thickness cannot be accurately controlled by using a traditional manual coating and scraping method for the gluing amount of hydro-generator stator wire bar U-shaped groove lining paper. A gluing amount control tool (12) is used for replacinga manual scraping method to glue semiconductor groove lining paper, and brushed semiconductor glue (2) is uniformly-distributed adhesive tape with rectangular cross sections. The adhesive tape is evenly distributed and is consistent in thickness, and the height adjusting error is smaller than 0.02 mm. The adhesive tape is flattened to form a uniform adhesive layer, and the thickness precision of the adhesive layer is far superior to 0.02 mm. The method is a brand-new process method, the embedding quality of the stator wire bar of a U-shaped groove lining structure is greatly improved, a largeamount of expensive semiconductor glue is saved, and double benefits of quality improvement and economic saving are brought.

Description

technical field [0001] The invention relates to the technical field of hydroelectric generator stator installation, in particular to a process method for precisely controlling the amount of glue applied to the U-shaped slot lining of a stator bar. Background technique [0002] The stator of a large hydro-generator needs to be assembled on the construction site, including stator frame assembly, stator positioning rib assembly and welding, stator core stacking, and stator bar embedding and other processes. The stator bar is the core component of the generator, and its installation quality plays a decisive role in the operation quality of the whole unit. There is a gap between the stator bar and the stator core slot, which will cause the slot potential to rise. In order to compensate for the gap and reduce the slot potential, the most commonly used measure is to wrap the semiconductor slot liner coated with semiconductor glue before the stator bar is embedded. Paper. U-shaped...

AI Technical Summary

Problems solved by technology

However, in actual operation, the amount of glue applied cannot be accurately controlled, and the thickness of the glue applied everywhere cannot be uniform, resulting in the gaps in some positions in the stator core slot not being filled, and excessive glue applied in some positions, resulting in a large amount of glue overflowing

In either case, it will affect the embedded quality of the stator bar

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