A new type of high temperature resistant product development based on ordinary magnetic pump the water cooling device is added between the motor and the magnetic coupling, prevent pumping medium high temperature heat conduction to the motor, in order to maintain the normal operation of the motor, so as to achieve no leakage of heat transfer medium, using temperature can reach 350 degrees Celsius, so high temperature magnetic drive pump what use should pay attention to: 1, due to the high temperature magnetic drive pump bearing cooling and lubrication is being delivered by the media. Therefore, airlift is absolutely prohibited. At the same time, it avoids the time and space transplanting when the power is stopped in the middle of the work. 2, high temperature magnetic drive pump is transported medium, if it contains solid particles, the inlet of the pump should be added with filter net: if it contains ferromagnetic particles, a magnetic filter should be added. 3. The conveyed medium and its temperature should be within the scope of the material of the pump. High temperature magnetic drive pump using the temperature of <280 DEG C, the maximum working pressure of 1.6Mpa, density of not more than 1840kg/m3, not containing hard particles and rod dimensional liquid viscosity is less than 30cm2/s. Special conditions shall be strictly stipulated in the contract agreement. 4, for the medium that the liquid is easy to precipitate, it should be cleaned in time after use, and the liquid in the pump is cleaned. Drive 5, high temperature magnetic pump normal operation after 1000 hours, the situation should be overhauled Mo loss bearing and end ring, and replace the damaged parts should not be reused. 6, the internal and external magnetic couplings of this series of pumps use high performance permanent magnet materials, which may cause potential damage to the following devices. Please keep the following devices in a distance with this series of magnetic pumps. Such as: cardiac pacemaker, credit card and other magnetic cards, calculator, computer disk, watch and so on.
In addition, the common malfunction of high temperature magnetic drive pump is to be dealt with.
1, high temperature magnetic drive pump bearing damage. The material of the bearing of high temperature magnetic drive pump is high density carbon. If the pump breaks water or the pump has impurities, it will cause the damage of the bearing. The coaxiality between the inner and outer magnetic rotors of a cylindrical coupling can not be guaranteed, but it will also directly affect the life of the bearing.
2. The lift is insufficient. The causes of this kind of failure are: air in the conveying medium, the damage of the impeller, the insufficient speed, the excessive proportion of the conveying liquid and the large flow of the flow.
3. The high temperature magnetic drive pump shaft is broken. Pump shaft type CQB high temperature magnetic pump material used is 99% alumina ceramic, the main reason is because the pump shaft is broken, air pump running, dry grinding and bearing shaft is broken. When the pump is disassembled, it can be seen that the main way to prevent the pump from being worn seriously is to avoid the air transfer of the pump.
4, the flow is insufficient. The main causes of insufficient flow are the damage of the impeller, the low speed, the high lift, and the clogging of the pipe.
5, high temperature magnetic drive pump can not produce liquid. High temperature magnetic drive pump can not produce liquid is the most likely failure of the pump, and its reasons are more. Should first check whether the pump suction line leak, check whether the air suction tube discharge, high temperature magnetic drive pump perfusion liquid enough suction tube is blocked with debris, the pump should also check whether the reverse (especially in another motor or a power line after the overhaul). Should also pay attention to the pump suction height is too high. If the above check can not be solved, the pump can be disassembled and checked to see if the pump shaft is broken. The check whether the pump's moving ring and static ring are intact, and whether the whole rotor can move a little axially. If the axial movement is difficult, it is possible to check whether the carbon bearing is too close to the pump shaft.
It is worth noting that the high temperature magnetic drive pump has been repaired for several times, and should pay attention to the normal work of the magnetic coupling. Bearings, internal magnetic rotors and spacers will generate heat during operation. This will increase the working temperature and decrease the transmission power on the one hand. On the other hand, it will cause great trouble for the high temperature magnetic drive pump to transport easily vaporized liquids. Magnetic transmission power with increasing temperature is a continuous decline in the curve, usually working in the magnet temperature limit below the decline of its transmission capacity is reversible, but above the limit temperature is not reversible, i.e. magnetic cooling after the loss of transmission capacity can not be restored. Under special circumstances, when the magnetic coupling appears slipping (out of step), the swirl heat will increase sharply and the temperature will rise sharply. If it is not processed in time, it will cause the demagnetization of magnetic steel and the failure of magnetic coupling. So a high temperature magnetic pump should be designed for a reliable cooling system. To not easy evaporation medium, the cooling system in general by the impeller outlet or the pump exit fluid flow, the bearing and magnetic drive part back to the suction population, easy evaporation medium, should increase the heat exchanger or tank flow leads to the outside of the pump, avoid heat back to the suction inlet, have solid impurities or ferromagnetic impurities should be considered medium filter, medium to high temperature, you should consider cooling, to ensure that the magnetic coupling does not exceed the working temperature limit.
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