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2. Pump operation, it is necessary to use a small amount of liquid on the inner ring between the rotor and the isolator ring gap region and sliding bearing friction pair for erosion cooling. Coolant flow is typically between 2% and 3% of the pump design flow, and the annulus area between the inner magnet rotor and the spacer creates high heat due to eddy currents. When the cooling fluid is not enough or poor scour hole, clogging, will lead to the medium temperature is higher than the permanent magnet operating temperature, the magnetic rotor gradually lose magnetism, the magnetic actuator failure. When the medium is water or water-based liquid, the annulus area can be maintained at 3-5 ℃. When the medium is hydrocarbon or oil, the annulus area can be maintained at 5-8 ℃.
Brushless DC pump protection What are the
1. When the driven parts of the magnetic pump actuator operate under overload conditions, the driven parts of the magnetic actuator will slip on the shaft, effectively protecting the motor .