stress calculations on an impeller
stress calculations on an impeller
(OP)
Hello everyone,
First time I've posted an inquiry here although I've used it as a reference in the past. I have a double suction impeller with a shrink fitted wear ring that experienced a fatigue failure.I want to calculate the stresses on both the impeller hub and ring(both tangential and radial). I have the formula to calculate the static stresses induced by the shrink fit however I wanted to determine a way to find the stress as a function of speed on the rotating rings.Does anyone know what those formulas would be?
TIA
First time I've posted an inquiry here although I've used it as a reference in the past. I have a double suction impeller with a shrink fitted wear ring that experienced a fatigue failure.I want to calculate the stresses on both the impeller hub and ring(both tangential and radial). I have the formula to calculate the static stresses induced by the shrink fit however I wanted to determine a way to find the stress as a function of speed on the rotating rings.Does anyone know what those formulas would be?
TIA





RE: stress calculations on an impeller
RE: stress calculations on an impeller
RE: stress calculations on an impeller
thanks again for the input
RE: stress calculations on an impeller
thanks for a thorough explanation. When you mention local thermal stresses due to rubbing, what is their contribution given that the ring is constantly cooled by pumped liquid? More precisely, is this only a surface effect (somehow simillar to pitting due to high concentrated surface loads) , or it affects entire profile of the wearing ring?
I can imagine that a very small layer of metal is cooled and heated with each pump revolution. Can this create an initial crack?