Preparation method for realizing one-time dip forming of main insulation and anticorona layer of stator coil of large-scale high voltage motor

A technology for stator coils and high-voltage motors, which is used in the manufacture of motor generators, electrical components, electromechanical devices, etc., can solve problems such as environmental pollution and damage to human health, and achieve the effect of wide application prospects.

Inactive Publication Date: 2012-05-09
HARBIN ELECTRIC MASCH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the 1960s, the anti-halation layer of the stator coil of the multi-glue molded insulation system was painted by painting. Not only did the painting require space and extra manpower, but also the toxic solvents in the anti-halation paint were harmful to human health and polluted the environment.

Method used

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  • Preparation method for realizing one-time dip forming of main insulation and anticorona layer of stator coil of large-scale high voltage motor
  • Preparation method for realizing one-time dip forming of main insulation and anticorona layer of stator coil of large-scale high voltage motor

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Experimental program
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Effect test

specific Embodiment approach

[0019] 1) After the stator coil wire 1 wraps the main insulation 2, use a tape measure and a template to mark a straight line, that is, at the end of the iron core 9, the low-resistance anti-corona layer 3, the end of the middle-resistance anti-corona layer 4, and the middle-high resistance anti-corona layer 5 , the position of the high-resistance anti-corona layer 6;

[0020] 2) A layer of low-resistance anti-corona layer 3 is half-stacked in the low-resistance range of the stator coil; Anti-corona layer 5 and high-resistance anti-corona layer 6;

[0021] 3) on the outer surface of the anti-corona layer at all levels, wrap several layers of additional insulating layers 7 in half;

[0022] 4) On the outer surface of the additional insulating layer 7, a layer of high-resistance anti-corona layer 8 is half-folded, and the material of the high-resistance anti-corona layer 8 is the same as that of the high-resistance anti-corona layer 6;

[0023] 5) When wrapping the low-resista...

specific Embodiment approach 2

[0028] Embodiment 2: The porosity of the reinforcing material of the anti-halation belt is between 0.5% and 10%. The anti-halation material is insoluble in the dipping paint, and the anti-halation material does not fall off during dipping.

specific Embodiment approach 3

[0029] Specific implementation manner three: the thickness of the single side of the main insulation of the high-voltage VPI stator coil is 1.5-7.5 mm.

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Abstract

The invention provides a preparation method for realizing one-time dip forming of a main insulation and anticorona layer of a stator coil of a large-scale high voltage motor, aiming at solving the problem of the one-time dip forming of the main insulation and anticorona layer of a VPI (vacuum pressure impregnation) stator coil bar. The preparation method comprises the following steps of: 1) gluing a plurality of layers of a stator conductor 1 with a mica tape 2; 2) respectively wrapping a low resistance band 3, a middle resistance band 4, a middle-high resistance band 5 and a high resistance band 6 at a low resistance section, a middle resistance section, a middle-high resistance section and a high resistance section of a stator coil in a half lap winding manner; 3) respectively wrapping an additional insulation layer 7 on the outer surfaces of the middle resistance band, the middle-high resistance band and the high resistance band in the half lap winding manner; 4) then respectively wrapping a high resistance band 8 outside the additional insulation layers 7 in the half lap winding manner; 5) wrapping a demoulding band provided with holes on the surface of the whole stator coil; and 6) placing the stator coil into a VPI paint tank, mounting the stator coil into a mould after the stator coil is dipped by paint, placing the mould into a baking oven, and carrying out hot-pressing curing and moulding, thus the finished product VPI stator coil is obtained. Critical coronal voltage of the stator coil of a generator is more than 2UN, UN is rated voltage, flashover breakdown voltage is more than 2UN, and electrical aging life is more than 1500 hours.

Description

Technical field: [0001] The invention relates to a preparation method for the main insulation of the stator coil of a high-voltage large-scale generator and the formation of the cloud layer by dipping paint once. Background technique: [0002] In the 1960s, the anti-corona layer of the stator coil of the multi-glue molded insulation system was painted by painting. Not only did the painting require space and extra manpower, but also the toxic solvents in the anti-halation paint were harmful to human health and polluted the environment. Since the 1970s, the anti-corona structure of one-time molding has been developed, that is, the anti-corona layer and the main insulation of the stator coil are formed by one-time hot pressing. At present, this structure has become an anti-corona structure commonly used in domestic multi-glue molded insulation systems. [0003] In the less glue VPI (vacuum pressure impregnation, vacuum pressure impregnation) insulation system, after the main in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K15/12
Inventor 李振海付强满宇光徐冰张秋寒郑伟黄程伟
Owner HARBIN ELECTRIC MASCH CO LTD
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