Winding wire composed of modified polypropylene jacket and cylinder core

Abstract

The invention discloses a winding wire composed of a modified polypropylene jacket and a cylinder core. The modified polypropylene of the winding wire comprises, by weight, 100 parts of polypropylene resin, 55 parts of flexible modifying agent, 3 parts of lubricant, 0.8 part of antioxygen and 0.6 part of copper ion inhibitor. The raw materials are added into a high-speed mixer to be fully mixed according to the proportion; after mixing, the winding wire is formed through machining and refining of a double-screw extruder, and a 180-level varnished wire is adopted as the raw material of the winding wire. The winding wire composed of the modified polypropylene jacket and the cylinder core is simple in production technology, thin in shell and good in insulating performance, has the advantages of being superior in mechanical strength and dielectric coefficient, good in flexible performance, resistant to high temperature and corrosion and the like, is suitable for a water filling submersible motor with the alternating current rated voltage ranging from 600 V to 1,000 V and is widely applied to fountain and industrial submersible motors.

Description

technical field [0001] The invention relates to a winding wire made of a modified polypropylene sheath and a barrel core, and belongs to the technical field of water-filled submersible motor components. Background technique [0002] The water-filled submersible motor winding wire in the prior art adopts cross-linked polyethylene insulated nylon sheath water-resistant winding wire, but the nominal thickness of the cross-linked polyethylene insulation is high and the outer skin is thin; the AC rated voltage U0 / U is 600 / 1000V, The long-term working temperature does not exceed 90°C, and the tensile strength at 20°C is ≥10N / mm2; and the production process is complex, and in the case of thin epidermis, it is easy to plasticize poorly, produce rubber particles, and cause leakage; PVC insulated water-resistant windings The outer skin of the wire is thick, the wire quality is hard, it is not easy to shape, and the slot full rate is high and it is not easy to go offline; the outer ski...

AI Technical Summary

Problems solved by technology

[0002] The water-filled submersible motor winding wire in the prior art adopts cross-linked polyethylene insulated nylon sheath water-resistant winding wire, but the nominal thickness of the cross-linked polyethylene insulation is high and the outer skin is thin; the AC rated voltage U0 / U is 600 / 1000V, The long-term working temperature does not exceed 90°C, and the tensile strength at 20°C is ≥10N / mm2; and the production process is complex, and in the case of thin epidermis, it is easy to plasticize poorly, produce rubber particles, and cause leakage; PVC insulated water-resistant windings The outer skin of the wire is thick, the wire quality is hard, it is not easy to shape, and the slot full rate is high and it is not easy to go offline; the outer skin is opaque, and some defects of the copper core are difficult to identify. The AC rated voltage U0 / U is 600 / 1000V, and the long-term working temperature does not exceed 70 ℃ , It requires relatively high performance for extrusion and is easy to age. At present, there is no domestic manufacturer; the domestic common polyethylene insulated nylon sheathed water-resistant winding wire has an AC rated voltage U0 / U of 450 / 750V, and the long-term working temperature does not exceed 70°C.

Because it is polyethylene insulation and nylon sheath, although the insulation layer is very thin, the advantage of adding nylon sheath is not great, and the insulation performance of nylon is not very good, so the leakage current often exceeds the standard. The motor is widely used, and the motor is often protected; the submersible motor is the main component of the submersible pump. With the improvement of people's environmental awareness and the enhancement of people's awareness of environmental protection, submersible pumps for sewage treatment have been more and more demanded and applied. Submersible motors are matched with various types of submersible pumps. The working environment is harsh and the heat dissipation is not good, which makes its working environment temperature increase, and some have reached the boiling point in a short time; therefore, the superiority of the submersible motor can only be based on the reliability of the submersible winding wire; Since the motor works underwater, the reliability of the motor insulation part is the most important. For commonly used water-filled submersible motors, it depends on the insulation characteristics of the submersible motor winding wires that bear all the insulation.

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