Giffen Marr wrote:
Paul
Am I to understand that the TC Drive is to be driven by a shaft
from the
Turbo compressor? If so, aren't shaft rotational speeds of 60k to 80k
going
to present a problem?
Giff Marr
LIV-P/20B 45%
What problems did you have in mind? This is what I think I am going
to use in the 1/2 inch size.
--
Paul Lamar ...No rotor no motor.
Paul
I know that over the years there have been problems with very high speed
shafting. The turbine/compressor shaft is very short and very well
supported. I believe there may well be a problem of shaft alignment and
balance at those speeds which could cause it to fail in a matter of seconds.
I had assumed that you were going to drive the compound portion with its own
turbine. I just noticed this and a light came on that there could be a
problem at the speeds you plan on running this at. I am no expert on high
speed shafting, but do know that the aerospace industry has had problems
with larger shafting and lower speeds. Just felt that you should have a
heads up on this.
Giff
Well yes on the turbo charger. There is a thing called a
whirl mode. But that is a short shaft with what amounts
to two flywheels on either end. We have a different situation here.
The 3/8" input shaft to the gear box is well supported
indeed being sandwiched between three large rollers.
Paul Lamar ...No rotor no motor.
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