Gas Turbine Handbook : Principles and Practices

40 Gas Turbine Handbook: Principles and Practices
Table 3-4.
——————————————————————————————————————————————
COMPONENT MATERIAL TRADE NAMES
——————————————————————————————————————————————
Housing Steel MSRR 6078, FV 448
——————————————————————————————————————————————
Stainless Steel Jethete M.152, 410
——————————————————————————————————————————————
Precipitation Inco 718
Hardening Super
Alloy
——————————————————————————————————————————————
Liner, Basket, Flame Tube Stainless Steel 321, C242 (MSRR 7143),
C263
(MSRR 7036)
——————————————————————————————————————————————
Precipitation Hastelloy X, N-155, HS-188,
Hardening Super Nimonic 75,
Alloy
——————————————————————————————————————————————
Additional information on material specifications and material compositions
is listed in Appendix C-2
carryover from the flight engine application. In flight engines, where
weight is a major concern, rotor weights are small and well within
the loading capabilities of ball and roller bearing design.
The rotor weights of the heavy frame industrial gas turbines
dictates the use of hydrodynamic sleeve-type journal bearings and
plain or Kingsbury-type thrust bearings. Hydrodynamic bearings
incorporate tilting pad bearing designs to aid in rotor stability and
alignment. The bearing designs used in the heavy industrial gas
turbines are similar to the designs used in pumps and compressors.
Therefore, in pump or compressor drive applications, the lubrication
media (oil) can be, and usually is, the same. The heavy industrial
gas turbine packages will use 1,500 to 2,500 gallons of turbine light
mineral oil for the gas generator, power turbine, and driven equipment.
This is four times that required of the aero-derivative package
of similar output (note also that aero-derivatives use a synthetic oil).
For example, the flight version of the aero-derivative engine requires
as little as 25 gallons of synthetic oil for airborne operation, while the