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Exploded View of Turbine Frame Assembly
Figure 001
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Exploded View of Turbine Frame Assembly
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Turbine Frame Struts Section and Numbering
Figure 002
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(1) There are 16 struts, airfoil-shaped and radial to the hub. The struts provide internal passage for the following items : (Ref. Fig. 003)
(a) Aft sump oil scavenge tube (No. 7 strut)
(b) Oil supply tube for the No. 4 and No. 5 bearings (No. 10 strut).
(2) The aft sump overboard seal drain tube is routed between struts No. 8 and No. 9.
(3) The front flange of the outer casing is bolted to the LPT case. The outer casing rear flange supports the primary exhaust nozzle. At its periphery, there are 3 clevis mounts for engine/airframe adaptation, and 2 brackets for handling and installation on engine storage stand. (Ref. Fig. 003)
(4) The hub inner front flange supports (from rear to front) the air heat cover and the No.5 bearing support. The air heat cover has three attachment circles:
- the inner one attaches (from rear to front) the inner flange of the air heat cover and the flange of the No.5 bearing support, to the hub inner front flange. The No.5 bearing support contains the adjusting sleeve in its central bore.
- the mid one provides support and attachment for the oil collector located forward of the air heat cover.
- the outer one attaches both the outer flange of the air heat cover, and the seal cover, to studs located on the forward face of the hub. The air heat cover acts altogether as a support for the oil collector and (rearwards) as a seal and a heat shield.
(5) The hub inner rear flange has the following attachment items:
- a bolt circle on its inner diameter
- a stud circle on its outer diameter The bolt circle provides attachment for the sheet metal flange assembly. The flange assembly provides the support, attachment and centering for the flame arrestor. The stud circle provides attachment for the engine exhaust plug (centerbody) with nuts.
Post SB CFMI 72-0176
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R Turbine Frame Struts Section and Numbering R Figure 002A
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Turbine Frame Struts Section and Numbering
Figure 002B
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Turbine Frame Section
Figure 003
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B. No. 5 Bearing Support for Turbine Frame with Radial Struts (Ref. Fig. 004) The No. 5 bearing support is made of steel alloy. Its outer flange is bolted, with the aft oil sump assembly, to the turbine frame. The inner flange of No. 5 bearing support accommodates the No. 5 bearing outer race and an adjusting sleeve. The rear face of the support carries the oil inlet cover which supports the oil supply tube for the No. 4 and 5 bearings, and provides for pressurization of the dual air/oil seal installed at the rear end of the center vent tube rear extension duct. The oil inlet cover supports the rear extension duct. The No. 5 bearing support has machined passages for :
- Pressurizing air to the oil inlet cover.
- Sump bleed air to the center vent tube.
- Oil to the scavenge tube.
- Oil supply to the No.5 bearing "squeeze film" vibration damping system. 中國航空網 www.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：A320飛機維護手冊 AMM ENGINE 發動機 2(101)
