# US 5,346,365 A · Gas turbine with exhaust gas casing and exhaust gas duct

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- Number: US 5,346,365 A
- Document ID: US5346365A
- Status: Granted
- Kind: A
- Application number: 08/114,181
- Filed: 1993-09-01
- Granted: 1994-09-13
- Earliest claimed: 1992-09-25
- Assignees: Asea Brown Boveri AG
- Inventors: Kamil Matyscak
- Web page: https://patentgrep.com/patent/US5346365A

## CPC

- F01D 25/243: {Flange connections; Bolting arrangements (F01D25/265 takes precedence)}
- F05D 2230/64: using positioning or alignment devices for aligning or centring, e.g. pins
- F05D 2230/642: using maintaining alignment while permitting differential dilatation
- F16B 2200/503: the flange being separate from the elements to be connected
- F16B 2200/506: bolted or riveted
- F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D)
- F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F16B: DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING (couplings for transmitting rotation F16D)

## Abstract

In a gas turbine, the exhaust gas casing (5) consists of a ring-shaped hub-end inner part (6) and a ring-shaped outer part (7), which parts bound a diffuser (9) and are provided with a horizontal split plane. The exhaust gas casing merges into an exhaust gas duct, whose boundary walls likewise consist of a ring-shaped hub-end inner part (16) and a ring-shaped outer part (17). The split locations between the exhaust gas casing and the exhaust gas duct are configured as flange connections (7A, 17A and 6A, 16A respectively). The flanges (7A, 17A and 6A and 16A respectively) at the split locations have a conically extending contact surface.

## Claims

### Claim 1

An axial flow turbomachine in which outlet rotor blades are followed downstream by at least an exhaust gas casing, comprising:
the exhaust gas casing having boundary walls that consist of a ring-shaped hub-end inner part and a ring-shaped outer part which bound a diffuser, the inner part and the outer part each comprising two half shells separable at a horizontal split plane;
the exhaust gas casing emerging into an exhaust gas duct, the exhaust gas duct having boundary walls that consist of a ring-shaped hub-end inner part and a ring-shaped outer part; and,
flanges on the exhaust gas casing and the exhaust gas duct Connecting the respective inner parts and outer pans,
wherein the flanges connecting the inner parts and the flanges connecting the outer parts located in different vertical planes, and wherein the flanges have conically extending contact surfaces,