GB2281592A - Exhaust gas diffuser for gas turbines - Google Patents
Exhaust gas diffuser for gas turbines Download PDFInfo
- Publication number
- GB2281592A GB2281592A GB9416985A GB9416985A GB2281592A GB 2281592 A GB2281592 A GB 2281592A GB 9416985 A GB9416985 A GB 9416985A GB 9416985 A GB9416985 A GB 9416985A GB 2281592 A GB2281592 A GB 2281592A
- Authority
- GB
- United Kingdom
- Prior art keywords
- exhaust gas
- hot
- gas
- struts
- diffuser
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/16—Arrangement of bearings; Supporting or mounting bearings in casings
- F01D25/162—Bearing supports
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/30—Exhaust heads, chambers, or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D9/00—Stators
- F01D9/06—Fluid supply conduits to nozzles or the like
- F01D9/065—Fluid supply or removal conduits traversing the working fluid flow, e.g. for lubrication-, cooling-, or sealing fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2230/00—Manufacture
- F05D2230/70—Disassembly methods
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Exhaust Silencers (AREA)
Description
- I - 2281592 Exhaust gas diffuser
Technical field
The invention relates to an exhaust gas 5 diffuser for gas turbines.
Prior art
Such exhaust gas diffusers are known. They 10 consist of a support structure and a hot-gas guidance structure which prevents the support structure from being heated excessively. The support structure is formed from an inner cylinder and an outer cylinder which are connected together by radial or tangential is struts. The hot-gas guidance structure lines the space between the two cylinders, including the struts. it must therefore be configured, during manufacture, to correspond with the shape of the support structure and must be joined together, during assembly, from two or a plurality. of parts by means of welded connections or plug-in connections.
An essential disadvantage of the known exhaust gas diffusers consists in the fact that the hot-gas guidance structure has to be fitted into the existing support structure during assembly. This takes place by inserting the parts of the prefabricated sheet-metal shell of the hot-gas guidance structure into the sup port structure and -only subsequently joining them together.
Manufacturing the exhaust gas diffuser in such a way is very labour-intensive. In addition, the com ponents of the hot-gas guidance structure can only be welded from the hot-gas side and this raises access problems with respect to the welding work to be carried out and therefore also with respect to its quality. In the case of a plug- in connection, the hot-gas structure is segmented and there are, therefore, a large number of individual hot-gas guidance parts which can only be sealed and joined together within the support structure at great expense& This likewise frequently causes quality problems. These quality shortcomings can have negative effects on the functional reliability of the exhaust gas diffuser.
A further disadvantage of the known exhaust gas diffusers, manufactured in the manner described, con sists in the fact that they cannot be non-destructively opened for inspection and repair purposes.
Description of the invention
The invention attempts to avoid all these disadvantages. It is based on the object of creating a functionally reliable exhaust gas diffuser for gas tur- bines which is relatively easy to assemble and which can also be non- destructively dismantled.
In accordance with the invention, this is achieved in that the support structure consists of a plurality of segments, which form the outer cylinder, are connected together so that they can be released and are each shaped to include at least one strut, and of an inner cylinder which is connected to the struts so that it can be released. The hot-gas guidance structure is provided with openings for the struts.
The advantages of the invention consist mainly in the f act that it is no longer necessary to join together the multi-part hot-gas guidance structure in the assembled condition of the exhaust gas diffuser, as was previously usual. Instead of having to join the hot-gas guidance structure together by welded connections or plug-in connections at locations with difficult access within the exhaust gas diffuser, as was previously the case, this work can now be undertaken before the assembly of the exhaust gas diffuser and, therefore, at locations which can be reached much more easily. In this way, a well-sealed hot-gas guidance structure is obtained for both types of connection and this structure can be installed as a complete unit. After the hot-gas guidance structure has been applied to the inner cylinder, the struts of the outer segments are inserted into the openings of the hot-gas guidance structure and are fastened, so that they can be released, in the inner cyl inder of the support structure. As a consequence of the configuration of the support structure according to the invention, the assembly joints occurring during the final assembly of the exhaust gas diffuser have been displaced from the hot-gas guidance structure into the relatively cold support ' structure where their sealing can be substantially better.
It is particularly expedient for each strut to have, at its free inner end, a spigot which engages, in the assembled conditionr in a correspondingly config- ured assembly groove of the inner cylinder. This also permit s simple and non-destructive dismantling of the exhaust gas diffuser.
Flange connections, known per se, are arranged at the periphery of the outer cylinder between the respectively adjacent segments. In this way. the segments are fastened so that they can be easily released and this likewise contributes to the possibility of non-destructive dismantling of the exhaust gas diffuser.
Brief description of the drawing
An embodiment example of the invention is represented in the drawing, using an annular exhaust gas diffuser.
In the drawing:
Fig. 1 shows a longitudinal section through the exhaust gas diffuser; 35_ Fig. 2 shows a' section through the exhaust gas dif- fuser along the line A-A in Fig. 1.
Only the elements essential to understanding the invention are shown. Not shown, for example, are the gas turbine and the chimney connected to the exhaust gas diffuser and the gas turbine shaft bearing system arranged within the inner cylinder - The flow direction of the working medium is indicated by arrows.
Method of carrying out the invention The exhaust gas diffuser 1 consists of a support structure 2 and a hot- gas guidance structure 3.
The support structure 2 is f ormed from a plurality of segments 4, which are connected together so that they can be released and which each have a strut 5, and an inner cylinder 6 which is connected to the struts 5 so that it can be released. The outer cylinder 7 consists of the totality of the segments 4 when they are connected together. The hot-gas guidance structure 3 is provided with openings 8 for the struts 5 (Fig. 2). Each strut 5 has,, at its free inner end,, a spigot 9 which engages, in the assembled condition, in a correspondingly configured assembly groove 10 of the inner cylinder 6 (Fig. 1).
The adjacent segments 4 are held together in the peripheral direction by means of flange connections 11. These each consist of two flanges 14 which, in the assembled condition, are located immediately adjacent to one another, are provided with holes 12 and are connected together by bolts 13.
Because the support structure 2 is arranged so that it can be released, the hot-gas guidance structure 3 can be joined together in a well-sealed condition before the final assembly of the exhaust gas diffuser 1 and can be installed as a complete unit. Af ter the hot-gas guidance structure 3 has been applied to the inner cylinder 6, as is represented in Fig. 2,, the struts 5 of the segments 4 are inserted into the openings 8 of the hot- gas guidance structure 3 and are fastened by means of the spigots 9 of the struts 5 into the assembly grooves 10 of the inner cylinder 6. In order to form a stable outer cylinder 7, the connection 93/105 of the segments 4, which are arranged adjacent to one anotherr then takes place by introducing the bolts 13 into the holes 12 of the flanges 14.
Dismantling the exhaust gas diffuser 1 for inspection and repair purposes takes place in the reverse order.
List of designations 1 Exhaust gas diffuser 2 Support structure 3 Hot-gas guidance structure 4 Segment Strut 6 Inner cylinder 7 outer cylinder 8 Opening 9 Spigot Assembly groove 11 Flange connection 12 Hole 13 Bolt 14 Flange 93/105 -4 -
Claims (4)
1. Exhaust gas diffuser for gas turbines, which consists of a support structure and a hot-gas guidance structure, the support structure being formed from one inner and one outer cylinder connected together by radial. or tangential struts and the hot-gas guidance structure lining the space between the two cylinders, including the struts, characterized in that the support structure consists of a plurality of segments F which form the outer cylinder I are connected together so that they can be released and are each shaped to include at least one strut, and of an inner cylinder which is connected to the struts so that it can be released, and in that the hot-gas guidance structure is provided with openings for the struts
2. Exhaust gas diffuser according to Claim 1, characterized in that each strut has, at its free inner end, a spigot which engages, in the assembled condition, in a correspondingly configured assembly groove of the inner cylinder
3. Exhaust gas diffuser according to Claim 1 and 2, characterized in that flange connections, known per se, are arranged at the periphery of the outer cylinder between the respectively adjacent segments
4. A gas turbine exhaust gas diffuser substantiaffy as herein described with reference to the accompanying drawings.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19934329623 DE4329623A1 (en) | 1993-09-02 | 1993-09-02 | Exhaust diffuser |
Publications (3)
Publication Number | Publication Date |
---|---|
GB9416985D0 GB9416985D0 (en) | 1994-10-12 |
GB2281592A true GB2281592A (en) | 1995-03-08 |
GB2281592B GB2281592B (en) | 1997-09-03 |
Family
ID=6496658
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9416985A Expired - Fee Related GB2281592B (en) | 1993-09-02 | 1994-08-23 | Exhaust gas diffuser |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE4329623A1 (en) |
GB (1) | GB2281592B (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1997004218A1 (en) * | 1995-07-19 | 1997-02-06 | Siemens Aktiengesellschaft | Cast housing for the exhaust gas connection piece of a turbo machine, in particular a steam turbine |
US6030176A (en) * | 1995-07-19 | 2000-02-29 | Siemens Aktiengesellschaft | Structural member for an exhaust-gas connection of a turbomachine, in particular a steam turbine, and set of at least two structural members |
FR2933130A1 (en) * | 2008-06-25 | 2010-01-01 | Snecma | STRUCTURAL CASING FOR TURBOMACHINE |
US10941669B2 (en) | 2018-12-21 | 2021-03-09 | Raytheon Technologies Corporation | Diffuser case support structure |
US11022144B2 (en) | 2019-03-22 | 2021-06-01 | Raytheon Technologies Corporation | Diffuser case assembly |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19737507A1 (en) * | 1997-08-28 | 1999-03-11 | Dampers Engineering Gmbh | Twist influencing device of exhaust gas flow in turbine |
DE102009007999A1 (en) * | 2009-02-07 | 2010-08-12 | Hobis Ag | Guide ring element for turbines and method for its production |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2226600A (en) * | 1988-12-29 | 1990-07-04 | Gen Electric | Turbine engine assembly with aft mounted outlet guide vanes |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL62040C (en) * | 1942-02-02 | |||
US3104525A (en) * | 1958-08-22 | 1963-09-24 | Continental Aviat & Eng Corp | Mounting structure |
US3739872A (en) * | 1971-05-27 | 1973-06-19 | Westinghouse Electric Corp | Gas turbine exhaust system |
JPS5554636A (en) * | 1978-10-16 | 1980-04-22 | Hitachi Ltd | Combustor of gas turbine |
US4921401A (en) * | 1989-02-23 | 1990-05-01 | United Technologies Corporation | Casting for a rotary machine |
-
1993
- 1993-09-02 DE DE19934329623 patent/DE4329623A1/en not_active Withdrawn
-
1994
- 1994-08-23 GB GB9416985A patent/GB2281592B/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2226600A (en) * | 1988-12-29 | 1990-07-04 | Gen Electric | Turbine engine assembly with aft mounted outlet guide vanes |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1997004218A1 (en) * | 1995-07-19 | 1997-02-06 | Siemens Aktiengesellschaft | Cast housing for the exhaust gas connection piece of a turbo machine, in particular a steam turbine |
US6030176A (en) * | 1995-07-19 | 2000-02-29 | Siemens Aktiengesellschaft | Structural member for an exhaust-gas connection of a turbomachine, in particular a steam turbine, and set of at least two structural members |
FR2933130A1 (en) * | 2008-06-25 | 2010-01-01 | Snecma | STRUCTURAL CASING FOR TURBOMACHINE |
RU2506437C2 (en) * | 2008-06-25 | 2014-02-10 | Снекма | Gas turbine engine structural carcass and gas turbine engine |
US10941669B2 (en) | 2018-12-21 | 2021-03-09 | Raytheon Technologies Corporation | Diffuser case support structure |
US11022144B2 (en) | 2019-03-22 | 2021-06-01 | Raytheon Technologies Corporation | Diffuser case assembly |
Also Published As
Publication number | Publication date |
---|---|
GB9416985D0 (en) | 1994-10-12 |
DE4329623A1 (en) | 1995-03-09 |
GB2281592B (en) | 1997-09-03 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
PCNP | Patent ceased through non-payment of renewal fee |