Large-capacity air-cooled steam turbine generator stator bar end part curing process

Abstract

The invention provides a large-capacity air-cooled steam turbine generator stator bar end part curing process, which comprises the following steps of: putting the involute length of the end part of astator bar into inter-row insulation, and wrapping the stator bar by 1 / 3 of a demolding belt in a stacking manner; putting the stator bar into a forming die, and clamping the stator bar; attaching theend part of the stator bar to the involute surface of the forming die, placing an arc-shaped plate, fixing the arc-shaped plate by using a C-shaped clamping device, and driving a tapered wedge to further fix the C-shaped clamping device; heating the end part of the stator bar by using a heating system, clamping again when the temperature of the temperature measuring points is 90-100 DEG C, and preserving heat when the temperature of all the temperature measuring points is 160-170 DEG C; and after heat preservation is finished, carrying out cooling, demolding and cleaning, and checking the inter-strand insulation condition and the section size of the end part of the stator bar. By using the curing process, the stator bar can be stressed uniformly in the heating process, the size is easy tocontrol, meanwhile, the paint dipping and brushing procedures before curing can be reduced, the production period is shortened, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of stator wire rod end curing technology, in particular to a large-capacity air-cooled turbogenerator stator wire rod end curing technology. Background technique [0002] As the demand for electricity increases, so does the requirement for generator performance. As an important component of a generator, the stator bar has an important impact on the performance and service life of the generator. The important factor affecting the stator bar is the curing quality of the stator bar. The fast curing quality directly affects the aging and broken strands of the stator bar, which in turn affects the generator. [0003] The existing method for solidifying the ends of stator wire rods of air-cooled turbogenerators is: after the strands are dipped or painted and wrapped with release tape, they are placed on the end forming mold or bending machine to heat and pressurize the strands to solidify. together. Heating is ...

AI Technical Summary

Problems solved by technology

Heating is performed by passing direct current through the wire rod. The size of the wire rod is large and the energy consumption is high. The wire rod will expand with heat and contract along the length direction, which will easily cause the shape of the wire rod to deform. The pressure is to compress the iron by bolts. To achieve this, the pressure has a lot to do with the operator, and the pressure on each part is sequential, which may easily cause uneven penetration of the glue and affect the effect of end curing; in addition, due to dipping or painting before curing Finally, it needs to be fully dried before wrapping the release tape, which makes the process complicated and the work efficiency is not high

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