Processing method of nonmetal isolating sleeve for magnetic pump

Abstract

The invention relates to a processing method of a nonmetal isolating sleeve for a magnetic pump, comprising the following steps of: uniformly stirring 65%-70% of polybenzimidazole and 30%-35% of polyetheretherketone, wherein the heating temperature is controlled to 350-370 DEG C, and the time is controlled to 1.2-1.8 hours; injecting the melted ingredients into a mould cavity to be formed, wherein the injection pressure is 7.0-8.0 MPa, and the injection time is 8-12 seconds; carrying out pressure-maintaining formation and then cooling 6-8 minutes along with air; taking out a formed product blank, cutting off burrs and flashing and smoothly grinding and finishing; inspecting according to the requirements of a drawing; performing a hydrostatic-pressure test of 3.0-5.0 MPa on the isolating sleeve on a special fixture, wherein the pressure-maintaining time is 15-25 minutes, and the phenomena of leakage and sweating do not exist; and then performing an air-tight sealing test on the isolating sleeve, if the isolating sleeve has no the phenomenon of air leakage, and then the product is a qualified product. The product enables the heat of magnetic force to not be gathered so that the demagnetization of magnetic steel can not be caused and the service life of the pump is prolonged.

Description

Technical field: [0001] The invention relates to a processing method of a non-metal spacer sleeve for a magnetic pump. Background technique: [0002] Magnetic pumps are widely used in the transportation of toxic, solid particle-containing media, toxic gas media, and media close to boiling point in chemical, petroleum, refining, pharmaceutical and other fields. Due to the adoption of a special dense, magnetic-concentrating, push-pull magnetic circuit coupled magnetic drive device, it has the advantages of compact structure, small volume, large torque, small eddy current, and high magnetic transmission efficiency. However, there is a defect that the eddy current heat generated by the magnetic field cutting the magnetic force lines cannot be dissipated when the inner magnetic rotor and the outer magnetic rotor are running, and the isolation sleeve is not used between them or the isolation sleeve is made of metal, so that the magnetic heat Accumulation, causing demagnetization ...

AI Technical Summary

Problems solved by technology

However, there is a defect that the eddy current heat generated by the magnetic field cutting the magnetic force lines cannot be dissipated when the inner magnetic rotor and the outer magnetic rotor are running, and the isolation sleeve is not used between them or the isolation sleeve is made of metal, so that the magnetic heat Accumulation, causing demagnetization of magnetic steel, greatly shortening the service life of the pump

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