Moisture-proof process of stator coil end
A stator coil and process technology is applied in the field of moisture-proof technology at the end of the stator coil, which can solve the problems of being susceptible to moisture and low density of the insulation layer at the end of the stator coil, achieve corrosion resistance and moisture absorption, improve fire performance and tensile strength. , the effect of high insulation
Active Publication Date: 2016-03-16
HANGZHOU FUCHUNJIANG HYDROELECTRIC EQUIP
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Problems solved by technology
[0003] The present invention mainly solves the technical problem that the insulation layer at the end of the stator coil is not high in density and is susceptible to moisture, and provides a moisture-proof process at the end of the stator coil that improves the insulation performance, fire resistance and tensile strength of the stator coil, and greatly improves the performance of the motor. insulation quality
Method used
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Embodiment
[0013] Embodiment: In the moisture-proof process of the end of the stator coil in this embodiment, epoxy resin glue is prepared first, and the density of the epoxy resin glue is: the volume ratio of epoxy resin to curing agent is 2:1. Then apply epoxy resin to the end of the stator coil wrapped with mica insulation cable ties. According to the program, it must be painted while off-line. Higher requirements, if the epoxy resin glue is too thick, it will be difficult to handle, uneven, and not in place; if the epoxy resin glue is too thin, the layer will be too thin, and it will be prone to edges. The curing speed of epoxy resin glue preparation is also very high. If the curing time is too short, the operator will not have time to complete the whole process; if the curing time is too long, it will affect the insulation layer before it enters the next binding process. quality. The painting of the epoxy resin on the end of the stator coil is completed before the second curing of ...
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The invention relates to a moisture-proof technology of a stator coil end. When a stator coil is subjected to semi-curing at the temperature of 180-200 DEG C, the end of the stator coil is coated with epoxy resin adhesive while coil inserting, then the outer edge of the end of the stator coil is bound with an alkali-free glass fiber ribbon immediately, and finally integral curing at the temperature of 155 DEG C is performed. Density of the epoxy resin adhesive is that a volume ratio between epoxy resin and a curing agent is 2:1. The main material used in the technology is the epoxy resin adhesive, so that the stator coil end has the advantages of heat resistance, high insulation, corrosion resistance, low moisture absorption and the like. The surface of the end of the stator coil is bound with the alkali-free glass fiber ribbon, so that fire resistance and tensile strength of the coil are improved.
Description
technical field [0001] The invention relates to a moisture-proof technology for the stator coil end of a hydroelectric generator. Background technique [0002] The stator coil, especially the stator coil of the hydroelectric generator, is usually made by a semi-curing process at 180°C to 200°C. The so-called semi-curing means that only the linear part of the coil is thermally molded and cured. The end part has not been molded, nor has it been cured at a temperature of 180°C to 200°C. The stator undergoes overall curing at 155°C. Therefore, the epoxy glue overflow curing degree of the end insulation layer of the stator coil is not complete, resulting in low density of the end insulation layer and easy to be affected by moisture. If the same hot molding process as the straight part is performed on the end of the stator coil at the same time, the required hot pressing mold is very complicated, and it is impossible to be practical in terms of economy. Contents of the inventio...
Claims
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IPC IPC(8): H02K15/10H02K3/38
Inventor 吴玉泉
Owner HANGZHOU FUCHUNJIANG HYDROELECTRIC EQUIP