What happens when the pump head is high and the impeller is cut off?
Impeller cutting is a very commonly used method, the pump head high, the general approach is to normal cylindrical impeller small car, do the impeller is not a lot of time in terms of the absence of cutting can not be balanced, the impeller diameter is greater than 180 should do balance, flow and head will small, the corresponding motor power is small, the efficiency decreased, the decline in the proportion of the amount is based on your cutting to determine the normal impeller cutting is not allowed to exceed half of the radius of the impeller, and can contact us, the lift pump flow that you tell us, tell us you need to flow and head, we can help you calculate
I have been turning the external diameter of the impeller, and take the IH80-65-160 pump as an example: before turning head is 32 meters, because the fight is liquid formaldehyde, high density, so the actual pump pressure becomes (3.6MPa), the measured motor current exceeds the rated current of the motor 17A, 2.6A, the winter low temperature pump operation environment 20 the summer day burning motor, pump continuous operation 2 days motor burned. Burning 8 electric motors, I had to 170cm the original impeller diameter by turning to 145cm, after turning head to 14 meters, traffic is reduced by 10%, to meet production needs, the current measured running motor is 9A, continuous operation for three years and did not burn the motor. Three years to save more than 80 thousand kwh of electricity.
1., pump impeller after cutting, to do dynamic balance, otherwise it will cause vibration of pump, damage pump shaft and motor;2. after the pump impeller cutting, the flow and lift head as well as the motor current will be reduced accordingly.
