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Insulation box filling adhesive and preparation method thereof

An insulation box filling glue and weight percentage technology is applied in the field of epoxy filling glue for the insulation of the stator winding end of generators, which can solve the problems of worsening unit accidents, low production efficiency, overflow of filling glue, etc., so as to improve production efficiency and save money. Good cost and compactness

Active Publication Date: 2016-04-13
ZHEJIANG RONGTAI TECH ENTERPRISE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process is relatively complicated, and requires high technical requirements for operators, and it takes a long time to wait for the curing process, resulting in low production efficiency
However, its biggest disadvantage is that when the sealing putty is unevenly sealed or incompletely cured, the heat generated at the end of the wire rod during the operation of the unit will cause the filler to overflow, which is easy to further deteriorate and cause unit accidents

Method used

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  • Insulation box filling adhesive and preparation method thereof
  • Insulation box filling adhesive and preparation method thereof
  • Insulation box filling adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] Preparation of component A: Add epoxy resin, defoamer and diluent to the container in order by weight percentage, stir and mix evenly; then, add 8% to 15% of ceramic fiber while stirring, and mix evenly; then, Add 15%-28% filler and 0%-1% wetting agent while stirring and mix evenly; after that, vacuumize for 30 minutes to 60 minutes while stirring, control the vacuum degree not higher than -0.1MPa, and get Group A after discharging share;

[0026] Preparation of Component B: Add curing agent and defoamer to the container by weight percentage, stir and mix evenly; then, add filler and sizing agent while stirring and mix evenly; after that, vacuumize while stirring for 30 minutes to 60 minutes Minutes, control the vacuum degree not to be higher than -0.1MPa, and get component B after discharging.

Embodiment

[0028] According to the amount of each substance shown in Table 1 (by weight ratio), 4 kinds of insulating box filling glues were prepared.

[0029] Table 1

[0030]

[0031]

[0032] Mix evenly according to the mass ratio of component A: component B = 2.5:1, and perform performance test after curing. The results are shown in Table 2.

[0033] Table 2

[0034] index Test conditions unit sample hardness normal Shore D ≥50 Dielectric constant normal MV / m ≥23 Bending strength normal MPa ≥52 Tensile Strength normal MPa ≥29 Elastic Modulus normal N / mm 2 ≥2500 Insulation resistance Normal, field strength 10kv / cm Ω ≥1×10 11

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Abstract

The invention provides an insulation box filling adhesive. The insulation box filling adhesive comprises a component A and a component B in a weight ratio of (2-4) to 1, wherein the component A comprises epoxy resin, ceramic fibers, fillers, defoaming agents, diluents and an impregnating compound; the component B comprises curing agents, the fillers, the defoaming agents and the impregnating compound. The insulation box filling adhesive has the beneficial effects that the thixotropy and compactness of the filling adhesive are improved, so that the filling adhesive can be individually used for filling insulation boxes at winding ends, without putty for sealing, and is beneficial to saving the material cost and improving the industrial production efficiency.

Description

technical field [0001] The invention relates to an epoxy filling glue, in particular to an epoxy filling glue for insulating the end of a stator winding of a generator, and a preparation method thereof. Background technique [0002] At present, the insulation at the end joints of the stator windings of domestic generators often adopts the method of sealing the insulation box with putty and then filling it with filling glue. The process requires that the respective components of the potting glue and the sealing putty must be kneaded evenly according to the specified ratio, and the port of the insulating box is sealed with the sealing putty, and then filled with the potting glue after it is completely cured. This process is relatively complicated, requires high technical requirements for operators, and the waiting process for curing takes a long time, thus resulting in low production efficiency. However, its biggest disadvantage is that when the sealing putty is unevenly seal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08K13/04C08K7/04C08K7/14
CPCC08K7/04C08K7/14C08K13/04C08K2201/014C08L63/00C08L2203/02C08L2205/025
Inventor 黄静杨李懿翟吉庆蒋强沈彬唐杰中
Owner ZHEJIANG RONGTAI TECH ENTERPRISE
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