They are actually hydrodynamic features that pump air which at a certain pressure and speed during operation, cause the carbon sealing component in the seal housing to separate (lift-off/not contact) from the mating ring and ride on a thin film of air. This significantly extends the mechanical seal's life since the wear member (the carbon sealing component) is not contacting/rubbing against the mating ring during operation. At ground when the engines are off and during certain operating conditions, the faces are in contact which is what prevents oil leakage until the right operating conditions are met for the faces to separate again.
What is the surface roughness required for this seals ?
What are the little grooves in the seal face called? Aveullas?
Do R/C!
they are leak slots
They are actually hydrodynamic features that pump air which at a certain pressure and speed during operation, cause the carbon sealing component in the seal housing to separate (lift-off/not contact) from the mating ring and ride on a thin film of air. This significantly extends the mechanical seal's life since the wear member (the carbon sealing component) is not contacting/rubbing against the mating ring during operation. At ground when the engines are off and during certain operating conditions, the faces are in contact which is what prevents oil leakage until the right operating conditions are met for the faces to separate again.
@@jerryjablonski4994 Fantastic explanation. Thank you.
Excelente!!!
Different compared than cfm56