1. Multi-stage centrifugal pump in the media or the delivery of small medium flow: the bearing dry rub, burn broken bearings. Multi stage centrifugal pump is provided with lubricating oil and cooling by conveying medium to the sliding bearing. In the absence of the open inlet valve or the outlet valve, the sliding bearing is damaged because of no transport medium oil and cooling.
2. Multistage centrifugal pump isolation sleeve damage: magnetic coupling of the multistage centrifugal pump is pumped by the transmission medium for cooling, if media are hard particles, can easily lead to the isolation sleeve scratch or cut through, if sometimes protection methods inappropriate may also lead to destruction of the isolation sleeve.
3. Multistage centrifugal pump in operation sparks caused by: multistage centrifugal pump axial force is after hydraulic balance form semi automatic equalization. In the actual operation if running parameter sparks high, it is easy to damage the multistage centrifugal pump hydraulic equilibrium, the sliding bearing bear large radial and axial force caused by bearing damage.
4. Multi-stage centrifugal pump due to cavitation caused by the problem: the pump sprouting vitality of the end from the main pump inlet pipe resistance, transport media more gas, irrigation pump is not sufficient, the pump inlet head is not enough, and so on. Cavitation damage to the pump is the biggest, the hair vitality of the pump violent oscillation, serious damage to the balance of hydraulic, will cause the pump bearing, rotor or impeller destruction. This is the common end of multi-stage centrifugal pump failure.
