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1) shaft fracture Magnetic pump shaft material used is 99% alumina ceramic, the main reason for the shaft is broken, because the pump is running, the shaft bearing dry grinding and the shaft twist off. Open the pump inspection can be seen when the bearing has been seriously damaged to prevent the pump broken off the main method is to avoid the air pump running. (2) bearing damage Magnetic pump bearings are made of high-density carbon material, in case of pump water or pump impurities, it will cause the bearing damage. Cylindrical shaft coupling inside and outside the rotor between the coaxial requirements if not guaranteed, will also directly affect the bearing life. (3) Lack of headache The reasons for such failure are as follows: there is air inside the transmission medium, the impeller is damaged, the speed is not enough, the proportion of the delivered liquid is too large, and the flow rate is too large. (4) insufficient flow caused by lack of flow due to the main reasons are: impeller damage, speed is not enough, the lift is too high, there are debris clogging in the tube, etc. (5) magnetic pump can not hit the liquid. Magnetic pump can not play the liquid pump is the most prone to failure, its reasons are more. First of all, check whether the pump suction pipe leaks, check the suction pipe air is exhausted, the amount of liquid filled in the magnetic pump is sufficient, inhalation tube whether there is debris clogging, check whether the pump is reversed (Especially after changing the motor or overhauling the power supply line), you should also pay attention to whether the suction height of the pump is too high. If the above inspection still can not be solved, the pump can be disassembled and checked to see if the pump shaft is broken. Check whether the moving ring and the static ring of the pump are intact, and whether the entire rotor can move in a small amount. If the axial movement difficulties, can check whether the carbon bearing with the pump shaft is too close. It is noteworthy that the magnetic pump repair several times to check the problem, should pay attention to the work of the magnetic coupling is normal. Bearings, inner magnetic rotors and spacers generate heat during operation, which increases the operating temperature and on the one hand reduces the power delivered and on the other hand gives rise to a great deal of hassle for the magnetic pumps that convey easily vaporized liquids. Magnetically transmitted power with temperature increases is a continuous decline in the curve, usually below the working temperature limit of the magnet, the decline of its transmission capacity is reversible, but above the limit temperature is irreversible, that is, the magnet cooling After losing the ability to pass the transfer can no longer be restored. Under special circumstances, when the magnetic coupling slips (out of step), the eddy current heat in the spacer increases rapidly and the temperature rises sharply. If it is not processed in time, the magnet will demagnetize and make the magnetic coupling fail. Therefore, the magnetic pump should design a reliable cooling system. The medium is not easy to vaporize, the cooling system is generally circulated by the impeller outlet or pump outlet leads to the liquid flow through the bearing and magnetic drive back to the suction port, the vaporization of the medium, the heat exchanger should be added or the liquid flow to the pump Of the tank, to avoid heat back to the suction port, for solid impurities or ferromagnetic impurities in the media, should consider filtering, high temperature medium, you should consider cooling to ensure that the magnetic coupling does not exceed the working temperature limit. In considering whether the speed is enough, we must first check the motor speed is normal, tachometer available for measurement, the motor speed is normal, you can consider whether there will be magnetic coupling slippage. Repair several times to find out the problem, should pay attention to the work of the magnetic coupling is normal. Bearings, inner magnetic rotors and spacers generate heat during operation, which increases the operating temperature and on the one hand reduces the power delivered and on the other hand gives rise to a great deal of hassle for the magnetic pumps that convey easily vaporized liquids. Magnetically transmitted power with temperature increases is a continuous decline in the curve, usually below the working temperature limit of the magnet, the decline of its transmission capacity is reversible, but above the limit temperature is irreversible, that is, the magnet cooling After losing the ability to pass the transfer can no longer be restored. Under special circumstances, when the magnetic coupling slips (out of step), the eddy current heat in the spacer increases rapidly and the temperature rises sharply. If it is not processed in time, the magnet will demagnetize and make the magnetic coupling fail. Therefore, the magnetic pump should design a reliable cooling system. The medium is not easy to vaporize, the cooling system is generally circulated by the impeller outlet or pump outlet leads to the liquid flow through the bearing and magnetic drive back to the suction port, the vaporization of the medium, the heat exchanger should be added or the liquid flow to the pump Of the tank, to avoid heat back to the suction port, for solid impurities or ferromagnetic impurities in the media, should consider filtering, high temperature medium, you should consider cooling to ensure that the magnetic coupling does not exceed the working temperature limit. In considering whether the speed is enough, we must first check the motor speed is normal, tachometer available for measurement, the motor speed is normal, you can consider whether there will be magnetic coupling slippage. Editor: Buddhist niche
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