CN215007894U

CN215007894U - High mechanical strength middling pressure pouring formula mutual-inductor

Info

Publication number: CN215007894U
Application number: CN202022208505.0U
Authority: CN
Inventors: 虞育号
Original assignee: Nanjing Zhida Electric Equipment Co ltd
Current assignee: Nanjing Zhida Electric Equipment Co ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-12-03
Anticipated expiration: 2030-09-30

Abstract

The utility model discloses a high mechanical strength middling pressure pouring type mutual-inductor, including primary conductor, glass silk net cloth layer, polyurethane insulating layer and secondary winding, all place glass silk net cloth layer in the outside of primary conductor and secondary winding's bottom, through polyurethane casting between primary conductor, glass silk net cloth layer and the secondary winding, polyurethane soaks glass silk net cloth layer and forms the polyurethane insulating layer. The medium voltage transformer adopting the glass fiber mesh cloth layer and polyurethane for pouring can have the excellent characteristics of polyurethane materials, simultaneously improves the mechanical strength of the transformer, can ensure the excellent electrical performance and mechanical performance of the transformer no matter in a short circuit state or a high temperature state, and greatly improves the reliability of product operation.

Description

High mechanical strength middling pressure pouring formula mutual-inductor

The technical field is as follows:

the utility model relates to a high mechanical strength middling pressure pouring formula mutual-inductor.

Background art:

at present, the medium-voltage transformer cast by polyurethane has good fluidity and toughness and small normal-temperature curing stress shrinkage, so that the electrical performance of the product can be obviously improved, partial discharge is reduced, and the polyurethane material can be cut and recycled at a high temperature, cannot cause environmental pollution and is an environment-friendly casting material.

However, compared with the conventional epoxy resin, the glass transition temperature of the polyurethane is lower, and when a product is subjected to instantaneous short circuit, a primary conductor generates large electric power to impact a polyurethane insulating layer, so that the mutual inductor is easy to crack, and the electric performance and stable operation of the product are affected. In addition, if the polyurethane casting transformer operates in a high-temperature state, when the operation temperature is higher than the polyurethane vitrification temperature value, the polyurethane insulation layer also becomes soft or cracks, so that the mechanical performance of the product is reduced, and the electrical performance and the stable operation of the product are influenced.

The invention content is as follows:

the utility model relates to a solve the problem that above-mentioned prior art exists and provide a high mechanical strength middling pressure pouring formula mutual-inductor.

The utility model discloses the technical scheme who adopts has: the utility model provides a high mechanical strength middling pressure pouring formula mutual-inductor, includes primary conductor, glass silk net cloth layer, polyurethane insulating layer and secondary winding, all places glass silk net cloth layer in the outside of primary conductor and the bottom of secondary winding, through polyurethane casting shaping between primary conductor, glass silk net cloth layer and the secondary winding, polyurethane soaks glass silk net cloth layer and forms the polyurethane insulating layer.

The utility model discloses following beneficial effect has:

the medium voltage transformer adopting the glass fiber mesh cloth layer and polyurethane for pouring can have the excellent characteristics of polyurethane materials, simultaneously improves the mechanical strength of the transformer, can ensure the excellent electrical performance and mechanical performance of the transformer no matter in a short circuit state or a high temperature state, and greatly improves the reliability of product operation.

Description of the drawings:

fig. 1 is a schematic structural diagram of the present invention.

In fig. 1:

1. a primary conductor; 2. a glass fiber mesh cloth layer; 3. a polyurethane insulating layer; 4. and (5) secondary winding.

The specific implementation mode is as follows:

the present invention will be further described with reference to the accompanying drawings.

As fig. 1, the utility model relates to a high mechanical strength middling pressure pouring formula mutual-inductor, including primary conductor 1, glass silk net check cloth layer 2, polyurethane insulation layer 3 and secondary winding 4, all place glass silk net check cloth layer 2 in the outside of primary conductor 1 and secondary winding 4's bottom, after vacuum drying handles, pour into at normal atmospheric temperature and degas the back electric property excellence through vacuum stirring, mobility, toughness are good polyurethane 3, form high mechanical strength after the polyurethane 3 solidification, do not have the bubble, the mutual-inductor that electric property is excellent. Polyurethane impregnates the glass fiber cloth layer 2 and forms a polyurethane insulation layer 3.

The utility model discloses the characteristics of polyurethane middling pressure pouring formula mutual-inductor pouring material have been fully analyzed, mechanical characteristics when especially considering the product operation. The glass fiber mesh cloth layer 2 is placed at the outer side of the primary conductor 1 and the bottom of the secondary winding 4, the mechanical characteristics of the mutual inductor are greatly increased on the premise of not influencing the electrical performance of the mutual inductor, and the glass fiber mesh cloth layer can enhance the mechanical strength of the polyurethane insulating layer no matter whether instantaneous short circuit or high-temperature state occurs, so that the risk of cracking or explosion of the mutual inductor can be effectively avoided, and the reliability of product operation is improved.

The medium voltage transformer cast by adopting the structure can have the excellent characteristics of polyurethane materials, simultaneously improves the mechanical strength of the transformer, can ensure the excellent electrical performance and mechanical performance of the transformer no matter in a short circuit state or a high temperature state, and greatly improves the reliability of product operation.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications can be made without departing from the principle of the present invention, and these modifications should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a high mechanical strength middling pressure pouring formula mutual-inductor which characterized in that: the cable comprises a primary conductor (1), a glass fiber mesh cloth layer (2), a polyurethane insulating layer (3) and a secondary winding (4), wherein the glass fiber mesh cloth layer (2) is arranged on the outer side of the primary conductor (1) and at the bottom of the secondary winding (4), the primary conductor (1), the glass fiber mesh cloth layer (2) and the secondary winding (4) are molded by polyurethane casting, and polyurethane permeates the glass fiber mesh cloth layer (2) and forms the polyurethane insulating layer (3).