Analysis of the cause of damage of high temperature magnetic pump isolation sleeve

Analysis of the Causes of Damage of High Temperature Magnetic Pump Isolation Cover of Stainless Steel Normal Temperature Magnetic Pump

The magnetic pump consists of a pump, a magnetic actuator and a motor. The key component magnetic actuator consists of an outer magnetic rotor, an inner magnetic rotor and a non-magnetic isolation sleeve. When the motor drives the outer magnetic rotor to rotate, the magnetic field can penetrate the air gap and the non-magnetic material, and drive the inner magnetic rotor connected with the impeller to rotate synchronously to realize the non-contact transmission of the power, and convert the dynamic seal into a static seal. Because the pump shaft and the inner magnetic rotor are completely closed by the pump body and the isolation sleeve, the problem of “running, escaping, dripping and leaking” is completely solved, and the flammable, explosive, toxic and harmful medium of the refining and chemical industry is eliminated. Security risks.

*, isolation sleeve damage: the magnetic coupling of the magnetic pump is cooled by the medium conveyed by the pump. If there are hard particles in the medium, it is easy to cause the isolation sleeve to be scratched or scratched. Sometimes, if the maintenance method is improper, it may cause isolation. The damage of the set.

Second, the problem caused by fluctuations in pump operating conditions: The axial force of the magnetic pump is automatically balanced by hydraulic equalization. In actual operation, if the operating parameters fluctuate greatly, it is easy to damage the hydraulic balance of the magnetic pump, so that the sliding bearing is subjected to large radial and axial forces and the bearing is damaged.

Third, no medium or conveying medium flow is small: dry the bearing and burn the bearing. The magnetic pump is supplied by the conveying medium to provide lubrication and cooling to the sliding bearing. In the absence of the opening or the outlet valve, the sliding bearing is damaged by the lubrication and cooling of the conveying medium.

Fourth, the pump caused by cavitation problems: the cause of cavitation caused by the pump is mainly due to the large inlet resistance of the pump, the gas phase of the medium, the insufficient pump, the insufficient inlet of the pump, and so on. The cavitation damage to the pump is large. When the cavitation occurs, the pump vibrates violently and the hydraulic balance is seriously damaged, which will cause damage to the pump bearing, rotor or impeller. This is a common cause of magnetic pump failures.

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