Can the flow rate and lift of the pump be adjusted by regulating the impeller size? Please say the basis. Thank you
Generally a model of pump, designed impeller diameter, and maximum and minimum impeller diameter. The principle is similar to the law, usually by cutting the impeller diameter to adjust the size of the centrifugal pump is the principle of work through the rotation of the impeller, the electric energy into pressure energy (lift), and a small amount of kinetic energy. The larger the impeller, the speed of rotation is general, the entrance conditions are the same. Impeller enlargement. Of course, flow and head can be improved to a certain degree, but because of the need to consider the pump shell from the outer end of the impeller, the general increase in size within the original diameter of the impeller 5%, through impeller cutting, because is generally achieved by cutting impeller diameter. And increase the impeller situation is not the same, but the basic law of similarity, but also adjust the angle of mouth, change the impeller shape. Therefore, the general impeller cutting is more complex, the calculation is generally similar to the law. A combination of experience. The law of similarity can be understood by Baidu!
The size of the impeller changes, the flow of water pump, lift will change. The pump impeller transfers energy to the medium, can produce energy by water pump flow and head to the performance, is a potential energy kinetic energy conversion process, the size of the energy impeller speed determines the size and can produce. The law of similarity.
Impeller through the cutting, change the size (diameter), change the maximum is the head, the head will be reduced. The reason is the energy from the impeller to the medium is water transfer, if the water quickly left the impeller, it shows that no energy is then transmitted to the medium, so the potential will be very small, so the pump lift is small, this is the truth, more popular.However, according to the characteristics of the pump curve, lift down, the flow will change, it will be appropriate to improve some.
