R **ON A/C 051-051,
R R Pre SB CFMI 72-0368 R Pre SB CFMI 72-0176 R
R NOTE : This descripton is for Turbine Frame with Tangential Non
____ R Symetrical Section Struts only.
R A. Turbine Frame with Tangential Non Symetrical Section Struts
R (Ref. Fig. 002A)
R The turbine frame assembly is made of nickel alloy and consists of a hub
R and a polygonal outer casing connected with tangential struts.
R (Ref. Fig. 001A)
R (1) There are 16 struts, airfoil-shaped and tangential to the hub. The
R struts provide internal passage for the following items :
R (Ref. Fig. 003A)
R (a) Aft sump oil scavenge tube (No. 7 strut)
R (b) Oil supply tube for the No. 4 and No. 5 bearings (No. 10 strut).
R (2) The aft sump overboard seal drain tube is routed between struts No. 7
R and No. 8.
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R Turbine Frame Section
R Figure 003A
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ECES E
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Turbine Frame Section
Figure 003B
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E 56-5B E
Oil Pressurizing Seals-Location
Figure 004
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R (3) The front flange of the outer casing is bolted to the LPT case. The
R outer casing rear flange supports the primary exhaust nozzle. At its
R periphery, there are 3 clevis mounts for engine/airframe adaptation,
R and 2 brackets for handling and installation on engine storage stand.
R (Ref. Fig. 003A)
R (4) On its front side, the hub of turbine frame has 3 attachment flanges
R that are, from the center and outward:
R - the hub inner front flange. This flange supports the No.5 bearing
R support.
R - the hub mid front flange. This flange supports the oil collector
R (or aft oil sump assembly).
R - the hub outer front flange. This flange supports the seal cover.
R The seal cover also provides forward retention of the inner flow
R path tiles.
R (5) On its rear side, the turbine frame has the following attachment
R items that are, from the center and outwards:
R - a flange located on the hub of turbine frame. This flange provides
R the support and attachment for the sheet metal flange assembly.
R This sheet metal flange assembly itself supports and centers the
R flame arrestor and also provides a rear support and centering for
R the oil inlet cover.
R - a circle of studs (quantity: 16). There is a stud projecting
R rearward at the root section of each tangential strut. The studs
R provide support and attachment for the engine exhaust plug
R (centerbody) with nuts.
R (6) The inner wall of the turbine frame gaspath is lined with stainless
R steel protective tiles. These tiles are located between the
R tangential struts. They have two stiffeners on their inner side to
R better withstand vibrations.
R
R Pre SB CFMI 72-0176
R Pre SB CFMI 72-0368
R
R B. No. 5 Bearing Support for Turbine Frame with Tangential Non Symetrical
R Section Struts
R (Ref. Fig. 004A)
R The No. 5 bearing support is made of steel alloy. Its attachment flange
R is bolted to the hub inner front flange of the turbine frame. The inner
R front bore of the No. 5 bearing support accommodates the No. 5 bearing
R outer race and an adjusting sleeve.
E E May 01/05 E E ECES E F 『 E C F M E E E E 56-5B E
R Oil Pressurizing Seals-Location
R Figure 004A
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