CN-224232371-U - Electromagnetic wire for large wind turbine generator set with tensile strength, corrosion resistance and high voltage resistance

Abstract

The utility model provides an electromagnetic wire with tensile resistance, corrosion resistance and high pressure resistance for a large wind turbine generator, which comprises a wire body, an insulating layer, a flame-retardant layer and an outer sheath, wherein the wire body comprises a metal conductor and a wire core, the metal conductor comprises a plurality of wires which are spirally wound on the wire core, flexible anti-wiredrawing wires are arranged in the wire core, the number of flexible anti-wiredrawing wires is at least 3, the flexible anti-wiredrawing wires are spirally wound with each other, the wire body is formed by twisting a plurality of metal conductors, the flexibility and the bending performance of the conductor can be improved, the wire core is arranged in the center of the metal conductor, the twisted flexible anti-wiredrawing wires are arranged in the wire core, the tensile strength of the electromagnetic wire is improved, the insulating layer comprises a mica tape of an inner layer and nano modified epoxy resin of an outer layer, the mica tape is precisely wound on the wire body, the nano modified epoxy resin covers the outer side of the mica tape, the double-layer insulating layer has good high pressure resistance and corona resistance effects, and the flame-retardant layer plays a role in insulating protection and wear resistance.

Inventors

• WEI CHENYI

Assignees

• 苏州鼎力福机电科技有限公司

Dates

Publication Date

20260512

Application Date

20250519

Claims (9)

1. 1. The anti-tensile, corrosion-resistant and high-voltage-resistant electromagnetic wire for the large wind turbine generator is characterized by comprising a wire body (1), an insulating layer (2), a flame-retardant layer (3) and an outer sheath (4); The wire body (1) comprises a metal conductor (11) and a wire core (12), wherein the metal conductor (11) comprises a plurality of wire cores (12) which are spirally wound, a flexible wire drawing resistance (13) is arranged in each wire core (12), and the number of the flexible wire drawing resistance (13) is at least 3 and the wire drawing resistance (13) is spirally wound with each other; The insulation layer (2) is coated on the outer side of the wire body (1), the insulation layer and the wire body (1) are integrally arranged, the flame retardant layer (3) is coated on the outer side of the insulation layer (2), the outer sheath (4) is coated on the outer side of the flame retardant layer (3), and the outer sheath (4) and the flame retardant layer (3) are integrally arranged; The insulation layer (2) comprises a mica tape (21) of an inner layer and nano modified epoxy resin (22) of an outer layer, wherein the mica tape (21) is precisely wrapped on the wire body (1), and the nano modified epoxy resin (22) covers the outer side of the mica tape (21).
2. 2. The electromagnetic wire for large wind turbine generator set according to claim 1, wherein the gaps between the metal conductors (11) are filled with rubber powder (5), and the rubber powder (5) is located between the insulating layer (2) and the wire core (12).
3. 3. The electromagnetic wire for large wind turbine generator set according to claim 1, wherein the outer side of the insulating layer (2) is further provided with a semiconductive water-resistant layer (6), and the inner side of the semiconductive water-resistant layer (6) is tightly attached to the outer side of the insulating layer (2).
4. 4. The electromagnetic wire for large wind turbine generator set according to claim 3, wherein the outer layer of the semiconductive water-resistant layer (6) is coated with a metal braiding layer (7), and the metal braiding layer (7) is located between the semiconductive water-resistant layer (6) and the flame-retardant layer (3).
5. 5. The electromagnetic wire for large wind turbine according to claim 4, wherein the flame retardant layer (3) comprises an inner flame retardant mica tape (31), a middle flame retardant coating (32) and an outer ceramic silicone rubber (33).
6. 6. The electromagnetic wire for large wind turbine generator set according to claim 5, wherein the flame-retardant mica tape (31) is wrapped outside the semiconductive water-resistant layer (6), and the flame-retardant coating (32) is an intumescent flame-retardant coating.
7. 7. The electromagnetic wire for large wind turbine generator system according to claim 6, wherein the outer sheath (4) is a PTFE outer sheath, and a wear-resistant layer is arranged on the outer side of the outer sheath (4).
8. 8. The electromagnetic wire for large wind turbine generator set according to claim 1, wherein the metal conductor (11) is copper alloy plated with nickel on the outer surface.
9. 9. The electromagnetic wire for large wind turbine generator set according to claim 6, wherein the intumescent flame retardant coating is an epoxy resin based intumescent flame retardant coating, and the semiconductive water resistant layer (6) is a metal oxide filled semiconductive water resistant layer.

Description

Electromagnetic wire for large wind turbine generator set with tensile strength, corrosion resistance and high voltage resistance Technical Field The utility model belongs to the technical field of electromagnetic wires, and particularly relates to an electromagnetic wire which is used for large-scale wind turbine generators and is tensile, corrosion-resistant and high-voltage-resistant. Background Electromagnetic wires for wind turbines are key materials for manufacturing electromagnetic equipment such as generators, transformers and the like in wind power generation equipment, and have important influence on performance and reliability of the wind turbines. When the wind turbine generator runs, higher voltage is generated, and the electromagnetic wire needs to bear thousands of volts or even higher voltage, so that the wind turbine generator has good insulating property and can bear high voltage without breakdown phenomenon. Vibration and friction can be generated during operation of the wind turbine generator system, and the insulating layer of the electromagnetic wire needs to have good wear resistance so as to prevent dielectric breakdown caused by wear. The wind turbine generator may be in different environments including humid and salt fog, and the electromagnetic wire needs to have certain corrosion resistance so as to prolong the service life. Along with the development of the wind power generation technology to the large-scale and high-efficiency, the electromagnetic wire for the wind turbine generator sets higher requirements. The existing electromagnetic wire has no capability of high voltage resistance, abrasion resistance and corrosion resistance, and can not meet the development trend of large-scale wind turbine generator. Therefore, the above problems are technical problems that need to be solved. Disclosure of utility model Aiming at the problems in the prior art, the utility model provides an electromagnetic wire for large wind turbine generator system with tensile strength, corrosion resistance and high voltage resistance, and aims to solve the technical problems. In order to achieve the above purpose, the utility model provides an electromagnetic wire for large wind turbine generator set, which is tensile, corrosion-resistant and high-voltage-resistant, and comprises a wire body, an insulating layer, a flame-retardant layer and an outer sheath; the wire body comprises a plurality of metal conductors and a wire core, wherein the metal conductors are spirally wound on the wire core, flexible anti-wiredrawing wires are arranged in the wire core, the number of the flexible anti-wiredrawing wires is at least 3, the flexible anti-wiredrawing wires are mutually wound to form a spiral arrangement, the wire body is formed by twisting the plurality of metal conductors, and an insulating layer is wrapped outside the wire body. The structure has good flexibility and bending performance, can meet the complex wiring requirement in the wind turbine generator, simultaneously can improve the current carrying capacity of the conductor by multi-strand stranding, is provided with a wire core at the center of the metal conductor, and is provided with a stranded flexible wire-drawing resistance, so that the tensile strength of the electromagnetic wire is improved; The insulation layer is coated on the outer side of the wire body, the insulation layer and the wire body are integrally arranged, the flame retardant layer is coated on the outer side of the insulation layer, the outer sheath is coated on the outer side of the flame retardant layer, and the outer sheath and the flame retardant layer are integrally arranged; The insulating layer comprises an inner mica tape and an outer nano modified epoxy resin, wherein the mica tape is precisely wrapped on the wire body, and the nano modified epoxy resin covers the outer side of the mica tape. The mica tape is used as an inorganic material, can bear 10-35kV high voltage, and the nano modified epoxy resin has excellent corona resistance. Further, gaps between the metal conductors are filled with rubber powder, and the rubber powder is located between the insulating layer and the wire core. Further, the outer side of the insulating layer is also provided with a semiconductive water-resistant layer, and the inner side of the semiconductive water-resistant layer is tightly attached to the outer side of the insulating layer. Further, the outer layer of the semiconductive water-resistant layer is coated with a metal braiding layer, and the metal braiding layer is positioned between the semiconductive water-resistant layer and the flame-retardant layer. Further, the flame-retardant layer comprises an inner flame-retardant mica tape, a middle flame-retardant coating and an outer ceramic silicone rubber. Further, the flame-retardant mica tape is wrapped on the outer side of the semiconductive waterproof layer, and the flame-retardant coating is an expansion type flame-reta