How to calculate the pump impeller size, know the head, flow, speed, power, cavitation margin
2. According to the cavitation margin NPSHr, you can calculate the specific speed of cavitationC=5.62*n* sqrQ/NPSHr0.75By comparing the rotational speed, GB/T13006 "centrifugal pump, mixed flow pump and axial flow pump cavitation margin", the corresponding values of the GB and the efficiency of the corresponding impeller form.3. Through the power, speed and efficiency, the diameter of the impeller and the diameter of the hub are calculated d1. According to the form of impeller (double suction, single suction, cantilever, through shaft and other forms) to determine the form of imported size.
4. Calculate the equivalent inlet size D0.5. Select blade inlet angle and outlet angle.6. Calculate the outlet diameter of impeller D2.7. Calculate impeller outlet width B2.Thus, the basic size of the impeller is calculated. Specific formula should be referred to "vane pump design manual" or "modern pump technical manual".I compiled a small program for pump impeller, pump body design and calculation. The basic size of the impeller and the size of each section of the pump can be calculated only by inputting the required parameters and selecting the material properties. You can leave me your email address here.
If you don't give efficiency, you can ask for it directly if you're efficient. But there's no harm in estimating. You can refer to "vane pump design manual" or "modern pump technology manual.". Here's a brief description of the process:1. The specific speed can be calculated according to the flow rate Q, the lift H and the rotational speed nNs=3.65*n*sqrQ/h0.75Through the specific speed can be GB/T13007 "centrifugal pump efficiency" check the GB efficiency value.
