Production process of inner magnetic rotor of magnetic drive pump

Abstract

The invention relates to a production process of an inner magnetic rotor of a magnetic drive pump, which comprises the following steps: uniformly coating glue liquid on the outer surface of a cleaned inner magnetic rotor body, pasting a magnetic material on the inner magnetic rotor body, curding for 2 hours at the temperature of 180 DEG C; sheathing the inner rotor body pasted with the magnetic material on a mould; adding fluorinated ethylene propylene (FEP) in the mould, heating to be 300-320 DEG C, keeping the temperature for 2-3h; pressing on a press with the pressure of 10-15MPa, and keeping the pressure for 30-40min and slowly cooling; processing a plug by using a tetrafluoroethane bar stock; and winding a tetrafluoroethane seal belt, coating acid-resisting antiseptic sealant, and twisting into a taper pipe thread of the pressed inner rotor. The invention ensures the whole encapsulating thereof through the pressing process and the sealing technology, does not leak, can improve the operational performance of high temperature of the magnetic rotor and transmitting performance of a strong corrodent, has the simple manufacture process and low production cost, and can completely ensure the operation performance of the inner magnetic rotor.

Description

technical field [0001] The invention relates to a production process of an inner magnetic rotor of a magnetic pump. Background technique [0002] In many industries, it is required to transport high-temperature and strong corrosive media. General metal corrosion-resistant chemical centrifugal pumps cannot meet the requirements. Special alloy pumps are expensive and uneconomical, so fluoroplastic-lined chemical centrifugal pumps or fluoroplastic-lined magnetic pumps are usually used. For pumps, the former uses an external mechanical seal that always leaks and pollutes the environment, while the latter has no leakage. However, since the internal magnetic rotor is made of plastics such as partial difluoride or polyether ketone, although the pressing process is simple, the encapsulation The inner magnetic rotor is safe and reliable, but it cannot withstand high temperature and strong corrosive media. It is also encapsulated with polyperfluoroethylene propylene (F46), but it is a...

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Problems solved by technology

[0002] In many industries, it is required to transport high-temperature and strong corrosive media. General metal corrosion-resistant chemical centrifugal pumps cannot meet the requirements. Special alloy pumps are expensive and uneconomical, so fluoroplastic-lined chemical centrifugal pumps or fluoroplastic-lined magnetic pumps are usually used. For pumps, the former uses an external mechanical seal that always leaks and pollutes the environment, while the latter has no leakage. However, since the internal magnetic rotor is made of plastics such as partial difluoride or polyether ketone, although the pressing process is simple, the encapsulation The inner magnetic rotor is safe and reliable, but it cannot withstand high temperature and strong corrosive media. It is also encapsulated with polyperfluoroethylene propylene (F46), but it is a secondary encapsulation process. The process is complicated, the effect is not good, and there are cracks , or the welding process, because the welding performance of polyfluoroethylene propylene (F46) is very poor, it is difficult to weld, and there is leakage. They are all unreliable processes, so they cannot provide a safe and economical resistance. Internal magnetic rotor with high temperature and strong corrosion resistance

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