Help: Hydraulic calculation of pumps
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I have a cantilever pump here, with a single flow channel in its volute. This pump has experienced multiple shaft breaks, and I believe the radial hydraulic forces acting on the impeller play a significant role in this issue. I would like to conduct calculations to investigate this matter; I hope everyone can advise me on how to carry out these calculations.
What is the outlet diameter? Generally, double volutes are used for outlets of 80 and above
What is the pump flow rate? What material is the shaft made of? What is the cantilever ratio? Power and speed? Axial diameter? There are various reasons for shaft breakage
The main reasons for pump shaft breakage include unreasonable shaft design, insufficient strength of the shaft material, the pump’s load exceeding the designed level, problems with the shaft’s heat treatment, inaccurate machining of the pump, pump vibration, and shaft corrosion, among others. There are very few newly designed centrifugal pumps these days; hydraulic problems are rare, and the issues are more often related to selection and design. You should start your investigation by examining those aspects.
The main reasons for pump shaft breakage include unreasonable shaft design, insufficient strength of the shaft material, the pump’s load exceeding the designed level, problems with the shaft’s heat treatment, inaccurate machining of the pump, pump vibration, and shaft corrosion, among others. There are very few newly designed centrifugal pumps these days; hydraulic problems are rare, and the issues are more often related to selection and design. You should start your investigation by examining those aspects.