Nomogram? Viscosity conversion
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How to read a nomogram? Given the performance of a centrifugal pump in clean water, how can the flow rate, head, and efficiency for viscous media be calculated?
Media with excessive viscosity are not suitable for transportation using centrifugal pumps
Viscosity has a significant impact on the performance of centrifugal pumps. At present, the viscosities that can be transported using centrifugal pumps are only those of water, diesel, and gasoline. Now, screw pumps are used for all lubricants (of L-DAB100 grade or turbine oil).
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I have old equipment here; centrifugal pumps were used in the past. When the temperature is low, the viscosity increases, which causes the pump to draw too much current and leads to motor burnout. So I want to do some calculations – I’ve looked up some information indicating that a conversion is necessary when the viscosity is above 20 m²/s, but I don’t know how to carry out these calculations. I’d appreciate some advice
I was using a centrifugal pump before, and now the motor burns out occasionally; therefore I want to check whether this overload is caused by a too large drop in efficiency
High viscosity leads to low efficiency, which in turn results in higher shaft power; increase the motor power to see
The foundation is already in place, so it’s a bit troublesome to replace the motor. I just want to check whether the efficiency is too low. If it is, we will ask the manufacturer to carry out repairs. If the shaft power after the replacement isn’t overloaded, then we need to investigate the issue with the medium. Thank you again for your response
Similar to frozen saline; the specific medium is kept confidential, and it contains alcohol
It is the same type of medium, but changes in its viscosity will certainly affect the shaft power. If it is not possible to replace the pump or motor, then it is necessary to keep the viscosity of the medium within the range that the pump can handle