(1) pump shaft broken.
Magnetic pump shaft material used is 99% of the alumina porcelain, the main reason for the shaft is broken, because the pump runs dry, 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) magnetic pump 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 coupling inside and outside the rotor between the coaxial requirements if not guaranteed, it will directly affect the bearing life.
(3) magnetic pump can not play the liquid.
Magnetic pump can not play the liquid pump is the most prone to failure, its reasons are more. First of all, check the suction pipe of the pump for any leaks, check whether the air in the suction pipe is drained, whether the amount of liquid poured in the pump is enough, if there is any clogged debris in the suction pipe, check if the pump is reversed Especially after changing the motor or overhauling the power supply line), you should also pay attention to whether the pump suction height is too high.
If the above inspection still can not be solved, the magnetic pump can be disassembled to check whether the pump shaft is broken or not. 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 of axial direction. If the axial movement difficulties, can check whether the carbon bearing with the pump shaft is too close.
It is worth noting that the pump repair a few times to find out the problem, should pay attention to the work of the magnetic coupling is normal. 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.
(4) insufficient head lift pump.
The reasons for this failure are: transmission medium air, impeller damage, speed is not enough, the proportion of liquid transport is too large, the flow is too large.
(5) insufficient magnetic flux pump.
The main reasons for the lack of flow are: impeller damage, speed is not enough, the lift is too high, the tube is clogged with debris and so on.