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Binder used for varnished wire of transposed conductor wire

A technology for transposition wires and enameled wires, applied in the direction of non-polymer adhesive additives, adhesives, adhesive additives, etc.

Inactive Publication Date: 2016-06-01
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After using thermally bonded transposed wires to make transformer windings, use the process temperature during drying and shaping to make the thermal adhesive cured on the surface of each enameled wire solidify again, so that the bonding between adjacent enameled wires occurs. At this time, Several enameled wires are bonded into a whole, and when a certain temperature is reached, the cured adhesive will melt again, so that the enameled wires lose their cohesive force, and it also makes thermally bonded transposition wires meaningless

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A production method of an adhesive used for bonding enameled wires in transposition wires according to the present invention adopts the following process steps, and the formula ratio is calculated by mass ratio: 16 parts of polyvinyl butyral and 11 parts of cresol formaldehyde resin And 1 part of hydrochloric acid; 18 parts of ethanol, 42 parts of butanol and 10 parts of xylene; 2 parts of aminopropyl triethoxysilane.

[0017] First add 16 parts of polyvinyl butyral and 11 parts of cresol formaldehyde resin into the reaction kettle, filter through a filter, and heat with a steam jacket at a heating temperature of 100°C to make polyvinyl butyral and cresol formaldehyde resin The melting is in a viscous flow state, and the temperature is gradually raised to 145°C, the heating time is 3.5 hours, and the sub-blade stirring wheel is started to stir for 3 hours, and the viscosity and solid content are measured by sampling. The viscosity is 650±100 seconds (No. 4 viscosity cup)...

Embodiment 2

[0022] A production method of an adhesive used for bonding enameled wires in transposition wires according to the present invention adopts the following process steps, and the formula ratio is calculated by mass ratio: take 15 parts of polyvinyl butyral and 11 parts of cresol formaldehyde resin And 1 part of hydrochloric acid; 20 parts of ethanol, 39 parts of butanol and 10 parts of xylene; 4 parts of aminopropyl triethoxysilane.

[0023] First add 15 parts of polyvinyl butyral and 11 parts of cresol formaldehyde resin into the reaction kettle, and filter through a filter; use a steam jacket to heat at a heating temperature of 105°C to make polyvinyl butyral and cresol formaldehyde resin The melting is in a viscous flow state, and the temperature is gradually raised to 150°C, the heating time is 4 hours, the split-blade stirring wheel is started to stir for 4 hours, the viscosity and solid content are measured by sampling, the viscosity is 650 ± 100 seconds; the solid content i...

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Abstract

The present invention discloses a binder used for a varnished wire of a transposed conductor wire and a production method thereof, and the binder is mainly prepared by use of polyvinyl butyral, cresol formaldehyde resin, hydrochloric acid, ethanol, butanol, xylene and aminopropyltriethoxysilane silane through heating, melting, condensation and other steps. According to the binder used for the varnished wire of the transposed conductor wire and the production method thereof, when a winding group is prepared from the transposed conductor wire, in the drying molding process, the times of melting can be set as once or twice, and after the production is complete, the binder may be permanently solidified. Ultra high temperature melting produced by a transformer winding subjected to short-circuit impacts can be resisted, the binding power of the transposed conductor wire is lost, and mechanical strength and the risk of occurrence of deformation can be reduced.

Description

technical field [0001] The invention belongs to the technical field of winding wire materials, and in particular relates to an adhesive for enameled wires of transposed wires and a production method thereof. Background technique [0002] At present, a large number of power transformers use transposed wires to make windings, and the transposed wires are made of several enamelled flat wires according to certain rules. In order to enhance the mechanical strength of the transformer winding and improve its impact resistance during operation, a liquid thermal adhesive is coated on the surface of each enamelled flat wire. The liquid thermal adhesive is mainly made of polyvinyl butyral, cresol formaldehyde resin and ethanol and other components in a certain proportion, melted, stirred and polycondensed. After the enameled flat wire coated with liquid hot adhesive is baked, a cured adhesive layer is formed on the surface of the enameled wire, and the enameled wire with the adhesive ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J187/00C09J11/06C08G81/02
Inventor 薛艳波程省委赵骞朱晓艳郎海涛牛辉
Owner STATE GRID CORP OF CHINA
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