CN202473356U

CN202473356U - H-level enclosed motor lead wire with polyimide and aramid fiber insulation

Info

Publication number: CN202473356U
Application number: CN201120563497XU
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 discloses an H-level enclosed motor lead wire with polyimide and aramid fiber insulation. The H-level enclosed motor lead consists of a metal conductor, an inner woven layer, an outer woven layer and a wrapping layer, wherein the outside of the metal conductor is wrapped by the inner woven layer, the wrapping layer and the outer woven layer from inside to outside successively; the inner woven layer and the outer woven layer are both woven by fibers made of Poly(p-phenylene terephthalamide) (aramid fiber); and the wrapping layer is formed by winding a thin-film strip made of polyimide on the inner woven layer. The polyimide serves as the material of the wrapping layer, has high chemical stability and higher high-temperature resistance than that of the PET. The Poly(p-phenylene terephthalamide) (aramid fiber) has high chemical stability and good high-temperature-resistant performance, and sound mechanical property. The woven cable product can be completely suitable for and applied to occasions of high-temperature high-pressure refrigerants and lubricating oil of an enclosed motor.

Description

Polyimides and aramid fiber insulation H level enclosed motor lead wire

Technical field

The utility model relates to field of cables, especially a kind of polyimides and aramid fiber insulation H level enclosed motor lead wire.

Background technology

The insulating barrier of present enclosed motor lead wire adopts the inside and outside layer of polyster fibre braiding, and the structure of the middle wrapped polyester film of 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 easily oligomer is extracted by the infiltration of lubricating oil and refrigerant, thus the electrical fault of causing.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 content 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.

Summary of the invention

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 polyimides and aramid fiber insulation H level enclosed motor lead wire; It is characterized in that: form by metallic conductor, interior braid, outer braid and lapping layer; Braid, lapping layer, outer braid in wrap up from the inside to the outside successively the metallic conductor outside; The fibrage that braid, outer braid are processed by PPTA (aramid fiber) in said forms, and lapping layer is that braid forms in being twined by the film band that polyimides is processed.

Advantage of the utility model and beneficial effect are:

1, the utility model adopts the material of polyimides as lapping layer; Because polyimides has good chemical stability; Resistance to elevated temperatures is better than PET; Adopt PPTA (aramid fiber) as interior braid, outer braid material, PPTA (aramid fiber) not only has good chemical stability, resistance to elevated temperatures, also has the favorable mechanical performance; Thereby the cable product after the braiding 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 utility model is strong polar material as PPTA (aramid fiber) material of inside and outside braid, and intermolecular adhesion is bigger; Molecular weight as the polyimide material of lapping layer is relatively large, and under actual serviceability temperature, the tendency of separating out oligomer is little.

3, the utility model is because the mechanical performance of PPTA (aramid fiber) is good; The lead wire skin that is woven into PPTA (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 polyimides and the PPTA (aramid fiber) of the utility model use all are the insulating material of excellent insulation performance; Wherein the long-term work temperature of aramid fiber reaches 220 ℃ of levels; The long-term work temperature of polyimides reaches 180 ℃ more than the level; Therefore, the cable of its combination being processed 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 polyimides and aramid fiber insulation H level enclosed motor lead wire; Form by metallic conductor 1, interior braid 2, outer braid 4 and lapping layer 3; Braid, lapping layer, outer braid in wrap up from the inside to the outside successively the metallic conductor outside; Said inside and outside braid all is to be formed by the fibrage that PPTA (aramid fiber) is processed, and lapping layer is that braid forms in being twined by the film band that polyimides forms.

Aramid fiber 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; PPTA (aramid fiber) has good chemical stability, resistance to elevated temperatures, also has the favorable mechanical performance.

Claims

1. polyimides and aramid fiber insulation H level enclosed motor lead wire; It is characterized in that: form by metallic conductor, interior braid, outer braid and lapping layer; Braid, lapping layer, outer braid in wrap up from the inside to the outside successively the metallic conductor outside; The fibrage that braid, outer braid are processed by PPTA in said forms, and lapping layer is that braid forms in being twined by the film band that polyimides is processed.