Pump problem?
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This post was last edited by FLYTOINTER on 2010-7-14 12:29. Since the pump is designed to have a large flow rate, it cannot operate at full load. Will long-term operation at low load have any impact on the pump?
The main reason is high energy consumption and waste.
The outlet valve is closed too small and the pump pressure is too high. The machine seal is prone to leakage.
Adding an inverter to the pump can solve the problem you are encountering and save energy.
The pump cannot operate at the optimal operating point and the energy consumption is too high
The most time-saving and labor-saving way: connect the return pipe from the back of the pump to the front of the pump to adjust the flow.:lol
If you want to join long-term reduced production, it would be best to change the frequency! For a short period of time, a shortcut should be taken, which will not have any impact on the operation of the pump, but the energy consumption will be higher.
You can connect the return flow or change the frequency control. If you run with such high energy consumption for a long time, it is recommended to change the frequency converter. If it is only a short-term operation, it is easiest to add a return pipeline from the outlet to the inlet.
From the perspective of energy saving, either replace the pump or add a frequency converter. It mainly depends on which province you invest in.
If it is a canned pump, the bearings will be easily burned out. It is recommended to replace the pump.； For ordinary centrifugal pumps, a frequency converter can be installed to reduce energy consumption!
Operating under this working condition for a long time will cause cavitation in the impeller, which is also detrimental to the mechanical seal.
For centrifugal pumps, which will cause cavitation of the pump, consider cutting the impeller or up-converting the device.
If the flow rate is smaller than the rated flow rate of the pump, and if the lift is sufficient, you can reduce the pump flow rate by changing the impeller diameter, but the pump lift will be affected. You can handle it according to your actual situation. Q/Q1 = (D/D1), but the lift becomes H/H1 = (D/D1) squared (D is the original impeller diameter, D1 is the modified impeller diameter)
The power consumption will not change if you add a frequency converter. If you cut the impeller, it is prone to cavitation. In the short term, add a return pipe. In the long term, it is best to replace the pump.
If the pump is running at low load for a long time, the power consumption will be high, and the performance of the pump will decrease in the future.
Calculate and cut the impeller, it will be easier.
There is no impact. But it’s a big horse-drawn cart
What if energy consumption is not considered? Is it possible to add a return line?
Can the extra flow be used to build a hydraulic recovery turbine to save energy?
Cutting the impeller is the most economical, but the energy consumption is slightly higher.