Centrifugal Supercharger output shaft bearing and seal
Hi, I am in the middle of rebuilding my centrifugal head unit that uses a lip seal for the impeller shaft. After crunching some numbers, I am drawng a blank. From my calculations, the impeller shaft spins at a speed that there are no material in a lip seal package can support. I believe PTFE has the lowest frictional coefficient and the max speed that a PTFE lip seal rated for is 50m/s. My calculation is based on 4500 engine RPM, 8 inch crank pulley, 3 inch input pulley, 22.5 mm shaft diameter. For the bearings, I have not been able to find any 6204, 6205 radial bearings that is rated for 62000 RPM. Any help will be appreciated.
