Winding wire for offshore wind power stator block and preparation method thereof

Abstract

The invention relates to a winding wire for an offshore wind power stator block and a preparation method thereof. The winding wire comprises a conductor and an insulating layer attached to the conductor, and the insulating layer comprises a first insulating layer and a second insulating layer which sequentially coat the conductor from inside to outside; wherein the first insulating layer is formedby a Teflon polyfluoroethylene propylene composite polyimide film wrapped on the conductor, and the second insulating layer is formed by polyester and glass mixed fibers wrapped on the first insulating layer. According to the winding wire for the offshore wind power stator block, the phenomenon that the sealing performance of a product is affected due to uneven bonding of the Teflon polyfluoroethylene propylene is avoided, meanwhile, the bonding performance of the Teflon polyfluoroethylene propylene after high-temperature treatment is higher, and therefore the sealing performance of an insulating layer is better; and the polyimide film is used as the main insulating layer, so that the electrical performance is more stable and reliable, the product is softer, the anti-knocking performanceis better, and the cable is more suitable for rear flat bending winding and bending forming.

Description

technical field [0001] The invention belongs to the technical field of special winding wires, and in particular relates to a winding wire for a stator block of offshore wind power and a preparation method thereof. Background technique [0002] As a clean energy, wind power has developed rapidly in China in recent years. Onshore wind power is close to saturation. Offshore wind power is a new development trend. Due to the particularity of the offshore wind power installation environment, if there is a problem, the cost of dealing with it is nearly 10 million. Therefore, Compared with onshore wind power, offshore wind power puts forward higher requirements for the reliability and stability of the stator coil quality. At the same time, in order to facilitate the maintenance of the stator coil, the stator coil of the offshore wind power is developed in the direction of the stator block. The winding and bending forming process also puts forward new requirements for the insulation ...

AI Technical Summary

Problems solved by technology

[0003] In the existing winding wire technology for offshore wind power stator blocks, the winding insulation structure includes the inner layer of grade 1 to grade 2 paint film and the outer layer of polyester glass sintering. The disadvantages are that the insulation electrical performance is poor in stability and the breakdown voltage is not high. The solvent evaporates during the manufacturing process, which is not conducive to environmental protection and operation health

Because the inner layer of the winding wire is made of enamelled copper flat wire, and the paint film is used as the main insulating material of the product, due to the limitation of the processing technology of the enameled flat wire and the limitation of the insulating paint chemical material, the electrical performance is unstable. The corresponding standard stipulates that When testing enamelled flat wire, take 5 samples for breakdown voltage test. Among the 5 breakdown voltage values, 1 point value is allowed to be lower than half of the specified value, and the product paint film layer is prone to pinholes and varnish Particles and other quality problems are not conducive to the stability of insulation performance

At the same time, a large amount of organic solvents containing xylenes will evaporate during the production process of the enamelled flat wire and the process of dipping and drying the glass fiber package, which is not conducive to environmental protection and the health of employees.

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