Please open up this
http://www.eng.ox.ac.uk/thermofluids...88,11,Existing Seals – current solutions
Now this will take a little time and unless you are a really dedicated
which I have to say I am, then skip the hard bits! The colours and design of this presentation is WONDERFUL so take the time. I must thank David Gillespie and Budimir Rosic from Oxford Uni Dept of Eng Sc.
It starts where is says THE BIG PICTURE
Go to THE SEALING CHALLENGE part
See the three cross sections of the shaft...with you mouse click on them...you see how the shape changes..that is why we have the spline wear and are losing the oil.
OK So how to fix!
See EXISTING SEALS
Now see THE NEXT GENERATION OF SEALS
EUREKA! That is the fix RR has done to the T900s..latest seal design.
WHOOPEEE!
All we have to do now is solve the excessive spline wear!
This is the patent detail of this seal:
Leaf seal, in particular for a gas turbine