gas turbines

[tomato5]

Reading about gas turbines for both power generation as well as say drivers for LNG compressors, the words SHAFT and SPOOL are botH used. Are these synonymous and if they are, why use different terminology?

Thanks

 

[abeltio]

In industrial type gas turbines:

The typical nomenclature is "turbine rotor spool" when the buckets are not installed, when the buckets are installed it is referred to as "turbine rotor".

The compressor rotor is always referred to as "Compressor rotor"

Compressor rotor + Turbine rotor (with distance piece when required) = Unit rotor

saludos.
a.

 

[racookpe1978]

In most gas turbines there are two "rotors" = one in the GT comprising the compressor blade mounts and the turbine blade mounts + the one in the generator. The two are bolted together and make one "shaft" that the operators have to consider one "unit" for operations (turning ear, cooldown, mass, inertia, lube oil, etc. They are only separate "things" when the GT is taken apart for major maintenance.

An big steam unit or nuke may have one "shaft" bolted together from the HP rotor + IP rotor + LP1 rotor + LP2 rotor + gen rotor

 

[tomato5]

abeltio (Mechanical) racookpe1978 (Nuclear)

i want to thank both you, but the point was between SHAFT and SPOOL? SHAFT is a well known common term, why bring in SPOOL?

regards