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Protection measures of Brushless DC pump
Jun 21, 2016

When the magnetic actuator driven components in case of overload operation, magnetic actuators driven components will skidding on the shaft, effective protection of the motor.

When the pump works, a small amount of liquid must be used to flush the gap between the inner magnetic rotor and the isolation sleeve and the friction pair of the sliding bearing. The flow rate of the coolant is usually 2%-3% of the pump design flow, and the annular gap between the inner magnetic rotor and the isolation sleeve produces high heat due to eddy currents. When the coolant is not enough or flushing hole jam, jam, will lead to the medium temperature is higher than the operating temperature of the permanent magnet, the inner magnetic rotor gradually loses its magnetism, magnetic actuator failure. When the medium is water or water base liquid, the temperature rise of the annular gap region can be maintained at 3-5, when the medium is a hydrocarbon or oil, the temperature rise of the annular gap region can be maintained at 5-8.