Multistage pump
Thread Content
Multistage pumps always experience overcurrent during operation; what are the possible reasons for this?’
Have the rotating and stationary rings made contact? Test the motor alone to see
1. The excessive operating speed of the pump causes the motor to operate under overload, leading to overcurrent; measures should be taken to reduce the operating speed of the multi-stage pump. 2. The power rating of the motor used with the multi-stage pump is lower than what is required, which increases the load on the motor; it is necessary to replace it with a motor of higher power rating as soon as possible to reduce losses. 3. If there are problems with the bearings or if the shaft is bent, it is important to immediately check whether there are any faults in the pump shaft and bearings, and replace them if necessary. 4. The packing gland is tightened too much; it should be adjusted to a more appropriate tightness. 5. During the assembly of the multi-stage pump, if there is too much clearance between the pump coupling and the motor coupling, or if they are not aligned properly, the pump coupling can be adjusted accordingly. 6. The model selected for installation has a head capacity that is much higher than what is required in actual operation, resulting in overcurrent; this issue can be resolved by installing an outlet valve to regulate the flow rate. 7. Prolonged idling of the motor can cause unstable operation when it is finally started; allowing the motor to run for some time will help it stabilize over time.
You need to explain the specific circumstances, the operating conditions, and what state things were in when this phenomenon occurred Answering your question in this way can only provide you with some reference; it’s not possible to conduct a specific analysis based on your issue, so it won’t truly be able to help you!
It is recommended to conduct a disassembly inspection for a clear overview. The specific criteria for judgment are quite complex; it’s better to break it down.
There are generally two possibilities for overcurrent: 1. Flow overload； 2. Mechanical failure!
It may be due to wear of the balance disc, resulting in a loss of axial balance. It needs to be dismantled for major repairs.