CN202473357U

CN202473357U - H-level enclosed motor lead wire

Info

Publication number: CN202473357U
Application number: CN2011205659093U
Authority: CN
Inventors: 金捷; 张立国
Original assignee: Tianjin Huazhiyang Special Cable Co Ltd
Current assignee: Tianjin Huazhiyang Special Cable Co Ltd
Priority date: 2011-12-29
Filing date: 2011-12-29
Publication date: 2012-10-03
Anticipated expiration: 2021-12-29

Abstract

The utility model relates to an H-level enclosed motor lead wire. The outside of a metal conductor is sequentially wrapped by an inner woven layer, an inner wrapping layer, an outer wrapping layer and an outer woven layer, wherein the inner woven layer and the outer woven layer are woven by fibers made of poly(p-phenylene terephthalamide) (aramid fiber); the inner wrapping layer is formed by winding a thin-film strip made of polytetrafluoroethylene on the inner woven layer; and the outer wrapping layer is formed by winding a thin-film strip made of polyimide on the inner wrapping layer. Polytetrafluoroethylene and polyimide are adopted to be materials of the wrapping layers, and have high chemical stability and higher high-temperature resistance than that of the PET; and poly(p-phenylene terephthalamide) (aramid fiber) that is used as a material to make the inner woven layer and the outer woven layer, has high chemical stability and good high-temperature resistance performance and good mechanical property. Therefore the product can be completely suitable for and applied to occasions of high-temperature high-pressure refrigerants and lubricating oil.

Description

A kind of H level enclosed motor lead wire

Technical field

The utility model relates to field of cables, especially a kind of H level enclosed motor lead wire.

Background technology

The structure and the material of enclosed motor lead wire are at present: insulating barrier is the inside and outside layer of polyster fibre braiding, wrapped again laminated polyester film in the middle of the inside and outside layer.The material of polyster fibre and polyester film is PET (PET) (or PETG), and the temperature resistant grade of this kind material is up to 125 ℃, can not be used for the enclosed motor lead wire of higher temperature grade.

When polyester raw material is used to freeze the insulation of impervious machine, need oligomer content very low, otherwise receive the infiltration of lubricating oil and refrigerant, oligomer is easy to extracted, and causes electrical fault.The fusing point of PET is lower, and hot property is relatively poor, in 180 ℃ of dry airs, places after 10 hours; It is very crisp that PET under equal conditions will become, and oligomer is than higher, and PET is to organic solution and chemicals poor stability in addition; Under actual serviceability temperature; It is more to separate out oligomer, and resistance to water is also relatively poor, does not meet the requirement of the external integument of high-temperature grade refrigeration impervious machine enclosed motor lead wire.

The utility model content

The purpose of the utility model is to overcome the deficiency of prior art, and the H level enclosed motor that a kind of thermal endurance is strong, compatibility is good lead wire is provided.

The utility model solves its technical problem and realizes through following technical scheme:

A kind of H level enclosed motor lead wire; Interior lapping layer, outer lapping layer by in the middle of metallic conductor, interior braid, outer braid and the inside and outside braid are formed; The metallic conductor outside is the interior braid of parcel, interior lapping layer, outer lapping layer, outer braid successively; Said inside and outside braid is to be formed by PPTA (aramid fiber) fibrage; Interior lapping layer is that braid forms in being twined by the film band that polytetrafluoroethylene forms, and outer lapping layer is that lapping layer forms in being twined by the film band that polyimides forms.

Advantage of the utility model and beneficial effect are:

1, the utility model employing polytetrafluoroethylene and polyimides are as the material of lapping layer; Because polytetrafluoroethylene and polyimides have good chemical stability; Resistance to elevated temperatures is better than PET, and the material PPTA (aramid fiber) of inside and outside braid not only has good chemical stability, resistance to elevated temperatures, and it is intact also to have the favorable mechanical performance; Thereby product is adapted at using under the occasion of cold-producing medium and lubricating oil of high temperature, high pressure of enclosed motor fully.

2, the polytetrafluoroethylene and the PPTA of the utility model employing are strong polar material, and intermolecular adhesion is bigger; The molecular weight of polyimides is relatively large, and under actual serviceability temperature, the tendency of separating out oligomer is little.

3, the mechanical performance of the PPTA that uses of the utility model is good, and the lead wire skin that is woven into aramid fiber has good abrasion resistance, helps narrow and small and have the occasion of wear-resisting requirement to use in the space.

4, the utility model employing polytetrafluoroethylene and polyimides are as the material of lapping layer; Main insulating layer as lead wire; The application of two kinds of materials all improves insulation property and withstand voltage properties than the individual layer insulation; Compare with the individual layer lapped insulation, the utility model is particularly useful for the bigger lead wire of sectional area ratio.

5, polytetrafluoroethylene, polyimides and the PPTA of the utility model use all are the insulating material of excellent insulation performance; Wherein the long-term work temperature of polytetrafluoroethylene reaches 250 ℃ of levels; The long-term work temperature of PPTA reaches 220 ℃ of levels; The long-term work temperature of polyimides reaches 180 ℃ more than the level, is used for the requirement that the enclosed motor lead wire can reach 180 ℃ of levels fully.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Embodiment

Through specific embodiment the utility model is done further to detail below, following examples are descriptive, are not determinate, can not limit the protection range of the utility model with this.

A kind of H level enclosed motor lead wire; Interior lapping layer 3, outer lapping layer 4 by in the middle of metallic conductor 1, interior braid 2, outer braid 5 and the inside and outside braid are formed; The metallic conductor outside is the interior braid of parcel, interior lapping layer, outer lapping layer, outer braid successively; Said inside and outside braid is to be formed by the fibrage that PPTA (aramid fiber) is processed; Interior lapping layer is that braid forms in being twined by the film band that polytetrafluoroethylene forms, and outer lapping layer is that lapping layer forms in being twined by the film band that polyimides forms.

Polytetrafluoroethylene, PPTA and polyimides that the utility model uses all have good chemical stability, and excellent insulation performance, thermal endurance reach the requirement of H (180 ℃) class F insulation; Aramid fiber has good chemical stability, resistance to elevated temperatures, also has the favorable mechanical performance.

Claims

1. H level enclosed motor lead wire; Interior lapping layer, outer lapping layer by in the middle of metallic conductor, interior braid, outer braid and the inside and outside braid are formed; The metallic conductor outside is the interior braid of parcel, interior lapping layer, outer lapping layer, outer braid successively; It is characterized in that: said inside and outside braid is to be formed by Fanglun 1414's braiding; Interior lapping layer is that braid forms in being twined by the film band that polytetrafluoroethylene forms, and outer lapping layer is that lapping layer forms in being twined by the film band that polyimides forms.