Magnetic pump usually consists of three parts: centrifugal pump, magnetic pump coupling and motor. The reasonable matching between the three is not only related to the economy of the magnetic pump operation, but also affects the reliability of the magnetic pump operation.
How to match the magnetic pump with the motor
Generally, centrifugal pumps operate in the range of 0.6 to 1.3 times the rated flow, and the large shaft power can be determined by the standard performance curve. Due to differences in manufacturing, the shaft power of each pump of the same model is not the same.
The rated speed of the magnetic pump is specified by the design, and the actual operating speed may be higher than the specified speed. When the actual operating speed of the pump is 2% higher than the specified speed, the shaft power will increase by 6%. Therefore, in addition to low-power pumps, medium and high-power pumps must have a certain power margin for this when determining the matching power. The viscosity and weight of the medium delivered by the centrifugal pump have a great influence on the supporting power of the pump, which should be determined by special calculation or conversion. In addition, an additional amount of power is set aside for some pre-foreseen factors.
The isolation sleeve of the acid and alkali resistant magnetic pump is in the alternating magnetic field where the inner and outer permanent magnet rotors rotate at high speed. The energy is released in the form of secondary heat, so it will reduce the effective magnetic power of the magnetic drive. The higher the eddy current loss rate, the lower the magnetic transmission efficiency. And because of a lot of heat, it will cause many unnecessary troubles. If the cooling is poor, it will even lead to the failure of the demagnetization of the permanent magnet. But when the isolation sleeve is a non-conductor material such as plastic, there will be no eddy current loss of power.
https://www.wxxjyby.com/