EP1756407A1 - Motor, fahrzeug mit einem solchen motor und verbindungselement zwischen einem ersten und zweiten element eines motors - Google Patents
Motor, fahrzeug mit einem solchen motor und verbindungselement zwischen einem ersten und zweiten element eines motorsInfo
- Publication number
- EP1756407A1 EP1756407A1 EP05745005A EP05745005A EP1756407A1 EP 1756407 A1 EP1756407 A1 EP 1756407A1 EP 05745005 A EP05745005 A EP 05745005A EP 05745005 A EP05745005 A EP 05745005A EP 1756407 A1 EP1756407 A1 EP 1756407A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- engine
- engine according
- connecting element
- exhaust duct
- fastened
- 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.)
- Withdrawn
Links
- 230000007704 transition Effects 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims description 39
- 238000002485 combustion reaction Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 description 5
- 239000000470 constituent Substances 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 239000004744 fabric Substances 0.000 description 3
- 229910001141 Ductile iron Inorganic materials 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
- 239000013598 vector Substances 0.000 description 1
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
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/14—Casings modified therefor
- F01D25/145—Thermally insulated casings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/20—Mounting or supporting of plant; Accommodating heat expansion or creep
-
- 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
- F05D2230/60—Assembly methods
- F05D2230/64—Assembly methods using positioning or alignment devices for aligning or centring, e.g. pins
- F05D2230/642—Assembly methods using positioning or alignment devices for aligning or centring, e.g. pins using maintaining alignment while permitting differential dilatation
Definitions
- An engine vehicle comprising said engine, and means for connecting a first and a second element in said engine
- the present invention relates to an engine, comprising a first element, a second element, an exhaust duct which extends from the first element into the second element, a connecting element which connects the first element to the second element and delimitates the exhaust duct at the transition between the first and second elements, said connecting element being flexible to allow relative movements between the first and the second element.
- the invention also relates to a vehicle provided with such an engine, said engine being situated with the second element vertically above or below the first element and under a floor of the vehicle.
- the invention relates to a connecting element for absorbing thermal movements between a first element and a second element connected to it, whereby an exhaust duct extends from the first element into the second element.
- the field of the invention comprises in particular engines for vehicles, particularly load-carrying vehicles, e.g. trucks or buses, although other applications are also conceivable.
- the first and second elements are exhaust duct constituent elements in or close to the engine of a vehicle.
- the invention relates to such elements in cases where thermal effects arising for example from exhaust gases flowing through the elements concerned cause relative movements between the elements as a result of their differing thermal expansion.
- the elements may be separately suspended relative to, or fastened to, one and the same frame and thereby be to some extent positionally fixed relative to one another.
- a connecting element provided at the transition between the elements therefore needs to be both flexible and sealing with respect to the exhaust gases which may be expected to flow through the elements concerned.
- the invention applies in particular to engines where a gas turbine is arranged in or forms part of the first element, and where a heat exchanger is arranged in or forms part of the second element, exhaust gases from the gas turbine being led away from it via the exhaust duct.
- the heat exchanger is preferably a stationary heat exchanger in which heat exchange takes place between exhaust gases and combustion air which is supplied to the gas turbine.
- the first element may take the form of a housing which surrounds the gas turbine
- the second element may take the form of a housing which surrounds or forms part of the heat exchanger.
- the connecting element comprises preferably a so-called compensator, preferably of the type called fabric compensator and which comprises a flexible fabric which either in itself or by being coated with suitable material can be substantially gas-tight.
- the second element which surrounds or forms part of the heat exchanger, is thermally insulated outside
- the first element the gas turbine housing
- recuperators for gas turbines are generally so designed that their outer casing assumes a temperature close to that of the hot gas. Insulation is applied on the outside of the recuperator to reduce temperature effects on the surroundings. This means that the temperature of the outer casing and connection flange on the inlet portion of the gas side may vary from cold start to maximum operating temperatures up to 700 °C.
- the outer housing parts of the actual engine i.e. those of the gas turbine, are insulated inside to make it possible to use conventional nodular iron housings or, in certain cases, aluminium housings. In such cases endeavours are made to ensure that the temperature of the outer housing is relatively low, preferably below 150 °C.
- connection which can absorb the relative movements which occur between the parts as a result of thermal expansion.
- the connection also needs to be gas-tight. In most cases this can be achieved by some kind of fabric compensator or metal bellows, which usually has a preferably axial extent.
- fabric compensator or metal bellows which usually has a preferably axial extent.
- the object of the present invention is to provide an engine of the kind mentioned in the introduction, with a compact design, in particular with an overall height as low as possible, whereby the first and second elements are for example disposed vertically above/below one another and whereby the engine is situated under a floor or the like of the vehicle in which it is installed.
- a further object of the invention is to propose a connecting element between a first element, which advantageously surrounds or forms part of a combustion engine, preferably a gas turbine, and a second element, which preferably surrounds or forms part of a heat exchanger connected to the first element, the connecting element being intended to facilitate a compact engine design and be of simple construction and advantageous to produce from the cost point of view.
- the connecting element forms a ring whose fastening to the first element is offset radially relative to its fastening to the second element.
- Ring-shaped in this context means not only a ring shape with circular inner and outer peripheries, but also other geometries which may be applicable, depending on, for example, the geometry of the recuperator.
- a preferred ring shape with respect to the shape of the second element, since the latter takes the form of a so-called recuperator, as will be described below, is therefore substantially rectangular or square inner and outer peripheries. This is a substantial difference from the tubular bellows used by the state of the art as flexible connecting element, and requires significantly less space.
- the connecting element has bulk in a radial direction relative to the exhaust duct rather than in an axial direction from the first element towards the second element, the elements can be placed closer together in the exhaust flow direction while maintaining the possibility of absorbing thermally related movements between the elements concerned.
- the connecting element has preferably an inner periphery at which it is fastened to the first element, and an outer periphery at which it is fastened to the second element.
- the inner periphery of the connecting element may be said to face towards said exhaust duct and its outer periphery may be said to face towards the second element.
- the second element extends radially externally relative to the exhaust duct in the region where it is adjacent to the connecting element, and the connecting element is a flexible connecting element which extends in a radial direction outwards from the duct towards the second element.
- the connecting element preferably takes the form of a flexible disc with a thickness which is substantially less than its extent in its propagation plane. Flexibility of the connecting element in the exhaust duct direction is thus promoted.
- the disc constituted by the connecting element propagates preferably transversely to the longitudinal direction of the exhaust duct at the transition between the first and second elements.
- the second element has preferably, in the region where it is fastened to the compensator, an inside circumference which is substantially larger than the circumference of the exhaust duct at corresponding cross-sections.
- the first element takes preferably the form of a relatively thin-walled pipe in the region in which it emerges into the second element, whereby the inside circumference of the second element in said region is larger than the outside circumference of the first element, and also conceivably overlap the latter in the exhaust duct direction.
- the invention comprises thermal insulation applied externally to the first element and internally to the second element in said region and protecting the connecting element from the actual exhaust duct and the hot gas which may be expected to flow through it.
- the invention comprises a gas turbine disposed in or forming part of the first element, a heat exchanger disposed in or forming part of the second element, and exhaust gases from the gas turbine being led away from it via the exhaust duct.
- Fig. 1 is a cutaway schematic diagram of part of an engine according to the invention, with a connecting element according to the invention between a first and a second element of the engine,
- Fig. 2 is a cross-section of part of a connecting element according to the invention
- Fig. 3 is a cross-section of an alternative embodiment of a connecting element according to Fig.2, and
- Fig. 4 is a view from above of a connecting element according to the invention.
- Fig. 1 shows schematically a part of an engine 1 according to the invention.
- the engine 1 is a gas turbine engine and comprises a recuperator 2 and an engine housing 3, i.e. a housing which surrounds the gas turbine of the engine. Exhaust gases are led from the engine housing 3 to the recuperator via an exhaust duct 4.
- the engine housing 3 is an example of a first exhaust duct constituent element
- the recuperator 2 is an example of a second exhaust duct constituent element.
- the engine housing 3 and the recuperator 2 are normally suspended in a frame (not represented in detail) in such a way that they are to some extent positionally fixed and need a flexible connection to absorb thermally induced relative movements.
- the second element here the recuperator 2
- the engine may comprise one or more compressors, intermediate coolers and further components which may normally form part of a gas turbine engine.
- the recuperator 2 is provided externally with thermal insulation 7, which means that the temperature of the recuperator plates closest to the exhaust duct will vary between the ambient temperature and exhaust temperatures which may be about 700 °C.
- the first element, here the engine housing 3, is provided with thermal insulation 8 on the inside to make it possible to use engine housing material of lower heat resistance, e.g. aluminium or nodular iron.
- the temperature of the engine housing walls may thus vary between ambient temperature and about 150 °C. Thermal expansion will result in relative movements between the recuperator 2 and the engine housing 3.
- a compensator 9 is arranged between and is connected to the engine housing 3 and the recuperator 2.
- the compensator 9 constitutes a flexible connecting element between the recuperator 2 and the engine housing 3 in that it is arranged to allow axial movements of the recuperator 2 towards and away from the engine housing 3.
- the recuperator plate in the region where it is intended to be fastened to the compensator 9 is wider, i.e. it has an inside circumference which is greater, than the portion of the engine housing 3 to which the compensator 9 is intended to be fastened.
- the recuperator extends radially externally relative to and at a distance from the portion of the engine housing 3 to which the compensator 9 is fastened.
- the compensator 9 extends mainly radially, i.e.
- its radial component is greater than its axial component in one or more vectors which describe its extent from the engine housing 3 to the recuperator 2 and relative to the exhaust flow direction (denoted by an arrow in Fig. 2) or the exhaust duct 4. It thus constitutes a disc or cone, with a cone angle which is preferably greater than 90° and, still more preferably, greater than 140° and, most preferably of all, close to 180°, i.e. a largely flat disc, in order to have as little bulk as possible in an axial direction.
- the compensator 9 takes the form of a flexible disc or plate, or a brim extending round the outlet of the engine housing 3. In the version depicted in Fig. 2, it is fastened by bolts 10 to a flange 11 which starts from the engine housing 3, and by bolts 12 to an end of the recuperator 2 which is situated radially externally relative to the flange 11.
- the compensator 9 is provided with means 5, 6 for fastening to the engine housing and the recuperator respectively, the means 6 for fastening to the recuperator being disposed radially externally relative to the means 5 for fastening to the engine housing, said means taking the form of holes to accommodate the bolts 10 and 12 respectively.
- the radially inner bolted connection constituted by the first-named bolts 10, and the radially outer bolt connection constituted by the latter bolts 12, are largely situated in the same radial plane and therefore contribute only to a small extent to the amount of distance between the recuperator 2 and the engine housing 3.
- the flange LI is made of thin sheet metal and is bent back towards the engine housing 3 in the region radially outside the region in which it is fastened to the engine housing 3. The overall height is thus further reduced.
- Fig. 3 shows an alternative version in which the compensator 9 is fastened directly to the engine housing 3 without any intermediate flange. This is a possible solution if the engine housing 3 exhibits low enough temperatures as to be sustained by the compensator material.
- a thermally insulating cushion 13 is arranged between the engine housing 3 and the recuperator 2 to protect and thermally insulate the compensator 9 from the exhaust gases in the exhaust duct 4.
- a first annular guide plate 14 for guiding the exhaust gases past the compensator 9 is fastened to the engine housing 3, and a second annular guide plate 15 for guiding the exhaust gases past the compensator 9 is fastened to the recuperator 2.
- the guide plates 14, 15 together constitute the portion of the exhaust duct 4 which extends from the engine housing 3 to the recuperator 2 in the region where the compensator 9 is arranged radially externally relative to them.
- the guide plate 14 fastened to the engine housing 3 extends, in the region where it overlaps the second guide plate 15, radially within the latter with a clearance which allows for thermal movements arising from the sometimes great differences in temperature of the components to which they are fastened.
- the contact surface of the guide plate 14 relative to the engine housing 3 needs to be minimised in order to minimise heat conduction from the guide plate 14 to the engine housing 3.
- the compensator 9 further comprises seal means 16 for sealing it relative to the engine housing 3 or the recuperator 2.
- the seal means 16 take the form in this case of a string of seal material, preferably Teflon or some other suitable material such as silicone rubber, which is applied between the compensator 9 and the component the recuperator 2 and the engine housing 3 respectively, to which the compensator is fastened.
- first element comprises a housing for a gas turbine and the second element comprises a recuperator are not limited to such an application but may with advantage occur in other applications where the first and second elements constitute quite different exhaust duct constituent components of an engine.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Exhaust Silencers (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0401500A SE527649C2 (sv) | 2004-06-04 | 2004-06-04 | Motor, fordon försett med en sådan motor, samt ett förbindningselement mellan ett första och ett andra element i en motor |
PCT/SE2005/000664 WO2005119032A1 (en) | 2004-06-04 | 2005-05-04 | Engine, vehicle provided with such an engine, and a connecting element between a first and a second element of an engine |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1756407A1 true EP1756407A1 (de) | 2007-02-28 |
Family
ID=32653586
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05745005A Withdrawn EP1756407A1 (de) | 2004-06-04 | 2005-05-04 | Motor, fahrzeug mit einem solchen motor und verbindungselement zwischen einem ersten und zweiten element eines motors |
Country Status (4)
Country | Link |
---|---|
US (1) | US20070059160A1 (de) |
EP (1) | EP1756407A1 (de) |
SE (1) | SE527649C2 (de) |
WO (1) | WO2005119032A1 (de) |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH399078A (de) * | 1963-02-15 | 1966-03-31 | Escher Wyss Ag | Gehäuse für Gas- oder Dampfturbinen |
US3968834A (en) * | 1975-02-07 | 1976-07-13 | Caterpillar Tractor Co. | Heat exchanger mounting for a turbine engine |
US4030288A (en) * | 1975-11-10 | 1977-06-21 | Caterpillar Tractor Co. | Modular gas turbine engine assembly |
US4184797A (en) * | 1977-10-17 | 1980-01-22 | General Electric Company | Liquid-cooled turbine rotor |
DE3375038D1 (en) * | 1983-01-18 | 1988-02-04 | Bbc Brown Boveri & Cie | Turbocharger having bearings at the ends of its shaft and an uncooled gas conduit |
EP0118051B1 (de) * | 1983-03-04 | 1988-02-03 | BBC Brown Boveri AG | Verbindung zwischen warmen und kalten Teilen bei ungekühlten Abgasturboladern |
US4668164A (en) * | 1984-12-21 | 1987-05-26 | United Technologies Corporation | Coolable stator assembly for a gas turbine engine |
US4815928A (en) * | 1985-05-06 | 1989-03-28 | General Electric Company | Blade cooling |
JPS62182444A (ja) * | 1986-02-07 | 1987-08-10 | Hitachi Ltd | ガスタ−ビン冷却空気制御方法及び装置 |
US4821522A (en) * | 1987-07-02 | 1989-04-18 | United Technologies Corporation | Sealing and cooling arrangement for combustor vane interface |
GB9304994D0 (en) * | 1993-03-11 | 1993-04-28 | Rolls Royce Plc | Improvements in or relating to gas turbine engines |
GB2354290B (en) * | 1999-09-18 | 2004-02-25 | Rolls Royce Plc | A cooling air flow control device for a gas turbine engine |
SE519323C2 (sv) * | 2001-06-28 | 2003-02-11 | Volvo Aero Ab | Moduluppbyggd gasturbin |
-
2004
- 2004-06-04 SE SE0401500A patent/SE527649C2/sv not_active IP Right Cessation
-
2005
- 2005-05-04 WO PCT/SE2005/000664 patent/WO2005119032A1/en not_active Application Discontinuation
- 2005-05-04 EP EP05745005A patent/EP1756407A1/de not_active Withdrawn
-
2006
- 2006-11-02 US US11/555,815 patent/US20070059160A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO2005119032A1 * |
Also Published As
Publication number | Publication date |
---|---|
SE0401500D0 (sv) | 2004-06-04 |
WO2005119032A1 (en) | 2005-12-15 |
SE527649C2 (sv) | 2006-05-02 |
SE0401500L (sv) | 2005-12-05 |
US20070059160A1 (en) | 2007-03-15 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 20070104 |
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Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR |
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DAX | Request for extension of the european patent (deleted) | ||
17Q | First examination report despatched |
Effective date: 20080110 |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20080521 |