Plastic package material of AC permanent magnet submersible motor, plastic package technique and application

Abstract

This invention provides a plastic sealant for AC permanent magnetic submersible motor, its sealing process and application. The plastic sealant is composed of: epoxy resin, diluent, curing agent, and silicon micropowder. The process comprises: (1) preparing the plastic sealant; (2) placing the motor stator in the stator sealing mold, locating, and placing the rotor in the rotor sealing mold; (3) sealing; (4) curing. This invention can be used for sealing AC permanent magnetic submersible motor, permanent magnetic wind power generator, electrical appliance, capacitor, transformer and inducer. This invention can largely shorten the sealing time, and can improve the sealing efficiency of diving motor. The plastic sealant has such advantages as low viscosity, smooth pouring, simple process, high product smoothness, good heat conductivity, good insulation, good waterproof property, no pollution during production and usage, and no toxicity to human bodies, thus is suitable for mass production.

Description

technical field [0001] The invention relates to a motor plastic packaging technology, in particular to a plastic packaging material for an AC permanent magnet submersible motor and its plastic packaging process and application. Background technique [0002] Existing submersible motors are all AC asynchronous motors, usually adopting a dry or wet waterproof structure. Due to the complex waterproof structure and large loss of mechanical seal, the submersible motor has large volume, low efficiency, and poor reliability of waterproof insulation. Especially for oil-immersed AC asynchronous submersible motors, once the mechanical seal is damaged, the protective oil inside the seal will directly leak out of the submersible. Outside the motor, causing water pollution. [0003] The existing patent (Patent No. 01108064.7) discloses a plastic sealing material for a plastic-encapsulated submersible motor and its plastic sealing process, which can effectively avo...

AI Technical Summary

Problems solved by technology

However, there are still obvious shortcomings in the existing patents: it can be seen from the specific examples that the prepared molding compound needs to be heated at 70°C for 1.5 hours, and the stator and tooling to be potted are heated at 70°C for 2 hours. Due to the poor fluidity of the molding compound, it needs to be poured 3 times. Vacuum 3 times, which takes 1 hour. After filling, heat at 70°C for 2 hours, heat at 80°C for 3 hours, heat at 100°C for 6 hours, then drop from 100°C to 75°C and keep it for 3 hours, then drop from 75°C to Keep warm at 50°C for 3 hours, then demould after cooling down to 50°C for 2 hours. Some submersible motors have poor fluidity of the plastic sealing compound prepared by the plastic sealing process. Although three times of filling and three times of vacuuming are used in the process, the actual effect is not ideal. The inner wall of the stator often fails to be filled, resulting in a high scrap rate. no less

[0004] It can be seen from this that the existing plastic sealing process of submersible motors is complicated, the plastic sealing time is long and the yield is low, time-consuming and energy-consuming, so the production cost is high, and it is difficult to apply in production

At the same time, the existing plastic packaging materials of permanent magnet submersible motors contain harmful substances such as acrylic acid, which are easy to pollute the environment and cause harm to the human body during production and use.

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