EP1193451B1 - Combustion chamber head of a gas turbine - Google Patents

Combustion chamber head of a gas turbine Download PDF

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Publication number
EP1193451B1
EP1193451B1 EP20010122467 EP01122467A EP1193451B1 EP 1193451 B1 EP1193451 B1 EP 1193451B1 EP 20010122467 EP20010122467 EP 20010122467 EP 01122467 A EP01122467 A EP 01122467A EP 1193451 B1 EP1193451 B1 EP 1193451B1
Authority
EP
European Patent Office
Prior art keywords
combustion chamber
heat shield
metering panel
base plate
cooling air
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.)
Expired - Fee Related
Application number
EP20010122467
Other languages
German (de)
French (fr)
Other versions
EP1193451A3 (en
EP1193451A2 (en
Inventor
Michael Ebel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rolls Royce Deutschland Ltd and Co KG
Original Assignee
Rolls Royce Deutschland Ltd and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to DE10048864 priority Critical
Priority to DE2000148864 priority patent/DE10048864A1/en
Application filed by Rolls Royce Deutschland Ltd and Co KG filed Critical Rolls Royce Deutschland Ltd and Co KG
Publication of EP1193451A2 publication Critical patent/EP1193451A2/en
Publication of EP1193451A3 publication Critical patent/EP1193451A3/en
Application granted granted Critical
Publication of EP1193451B1 publication Critical patent/EP1193451B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23RGENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
    • F23R3/00Continuous combustion chambers using liquid or gaseous fuel
    • F23R3/02Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration
    • F23R3/04Air inlet arrangements
    • F23R3/10Air inlet arrangements for primary air
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23RGENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
    • F23R3/00Continuous combustion chambers using liquid or gaseous fuel
    • F23R3/28Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
    • F23R3/283Attaching or cooling of fuel injecting means including supports for fuel injectors, stems, or lances
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23RGENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
    • F23R3/00Continuous combustion chambers using liquid or gaseous fuel
    • F23R3/42Continuous combustion chambers using liquid or gaseous fuel characterised by the arrangement or form of the flame tubes or combustion chambers
    • F23R3/60Support structures; Attaching or mounting means

Description

The invention relates to a gas turbine, with at least a combustion chamber, a combustion chamber wall, a base plate, at least one heat shield, at least one cuff and a cover.

The prior art shows different embodiments constructions for combustion chamber heads. These are For example, as a one-piece annular combustion chambers of several, non-detachably assembled components. The main components are the inner and the outer Combustion chamber wall and the combustion chamber head. This one is called Item, for example by means of a casting process or also from individual components such as sheets, turned parts, etc. produced.

Known combustion chamber heads are known, for example, from EP 841 520 A2, US 5,524,430, EP 927 854 A2, US 5,289,687 or US Pat US 5,331,815 previously known.

In addition to the integrally formed combustion chamber heads It is also known, individual components by means of bolt connections or the like to assemble with each other.

Overall, the previously known constructions are characterized from that the assembly is very expensive. Especially the mounting of the heat shield together with the cuffs The base plate is designed in some of the known constructions as difficult as these assembly operations of the Combustion chamber outlet fro carried out. Increase it Thus, the installation costs considerably.

In addition, the known combustion chamber heads have problem zones regarding the supply of cooling air, as the individual Components in parts of the supply of cooling air to the Can block heat shield.

Form in the construction known from EP 841 520 A2 the cuff and the heat shield are one unit and become together mounted from the combustion chamber outlet on the base plate. In this construction, which faces the combustion chamber Surface of the cuff to heat very much without any effective Possibility of cooling exists.

US-A-5 996 335 shows a combustor head for a gas turbine with an outer combustion chamber wall, a base plate, a heat shield and a cuff, with the base plate is formed integrally with the outer combustion chamber wall. The heat shield is from the downstream side of the base plate stored at this, while the cuff of the upstream side is mounted on the base plate. The Base itself is integral with an inner wall section educated.

Another embodiment of a combustion chamber head shows the US-A-5 129 231. The heat shield is from the inside of the Combustion chamber to be mounted, the attachment by means of Studs. The cuff itself is from the other side the base plate can be used.

The invention is based on the object, a combustion chamber head to create the type mentioned, which in a simple Construction simple and inexpensive to produce and assemble is and allows a good cooling of the heat shield.

According to the invention, the object is achieved by the features of the main claim solved, the dependent claims show further advantageous Embodiments of the invention.

The combustion chamber head according to the invention is characterized by a Series of significant benefits.

According to the invention it is provided that the heat shield of the downstream side is mounted on the base plate, while all other components from the upstream side the base plate can be installed. This type of assembly is much easier because it does not require bolted joints or the like from the combustion chamber to install and fasten. Due to the removable cover results a free, undisturbed access to the assembly areas. Because the Cover as additional, removable, independent component is made, the entire assembly of the combustion chamber head done in a trouble-free manner. It is not required, as known in the art, in the Cover mounting recesses or the like provided. Much more According to the invention is the upstream side of the base plate freely accessible without hindrance.

According to the invention, it proves to be particularly favorable that the cuffs from the upstream side of the base plate be supplied. This also makes the sliding and sealing surface Can be laid away from the base plate itself, so that cooling air now reach the interior of the heat shield unhindered can. This results in a more effective and improved Cooling.

In a particularly advantageous embodiment of the invention provided that the heat shield has studs, which can be performed by recess of the base plate. It can thus be waived, separate bolts or the like to handle. Furthermore, the attached attached to the heat shield Studs a high degree of operational safety, since There is no risk that parts will come loose during the process Operation can get into the combustion chamber.

The attachment of the cuff is carried out according to the invention preferably by means of retaining elements on the base plate. These Retaining elements can in a favorable development of the invention be attached to the stud of the heat shield. additional Bolt or screw connections can thus be completely omitted. The entire structure of the device is simplified quite considerably.

It is particularly advantageous if each retaining element has two adjacent ones Holds cuffs. This makes it possible to Make holding elements smaller, since these only one Part of the cuff must enclose. This too leads to an improved cooling air supply.

To attach the cover in the simplest possible way can, it is provided that on the holding elements at least a stud is arranged for attaching the cover. This can thus easily attached to the stud bolts and bolted from the outside.

To hold and position the cover is special favorable when the edge of the cover in a groove of the base plate is guided. The cover is made by this construction securely held and centered. The groove is still in Case of a bird strike intended to support the cover. In this case, the rather simple designed sheet metal part Do not just buckle, it needs a lot more energy in it Deformation work to be implemented, which reduces the degree of deformation and thus another function of the combustion chamber head for the remaining operating time.

According to the invention, the base plate, as well as from the state known in the art, with a variety of cooling air openings Mistake.

To improve the cooling of the heat shield, it can be cheap if this is an upstream, through has a recess of the base plate feasible edge, against which a collar of the sleeve rests. The height of the Randes is chosen so that the edge when installed sufficiently far over the upstream side of the base plate protrudes and thus the cooling air free access to to the central area of the heat shield allows, even if the Collar of the sleeve rests on the cylindrical edge.

The proposed construction according to the invention allows between the outer wall of the cylindrical edge of the cuff and the inner wall of the edge of the heat shield one to leave a defined gap, which is a radial and circumferential Displacement of a fuel nozzle and the combustion chamber head allows each other. The collar of the cuff is around the maximum possible amount of shift greater than the outer one Diameter of the edge of the heat shield is wide, too at the maximum possible displacement of the cuff the space in front of the base plate against the combustion chamber with regard to unintentional Seal leakage air. It therefore results very much advantageous assembly and operating conditions.

Furthermore, it is of particular advantage that appropriate Gaps between the sleeve and the retaining elements allow sufficient play, that for the thermal compensation is necessary. On the other hand, it is ensured that the cuff can not leave its position. The cuff is through the left or right part of the adjacent holding elements safely and sufficiently positioned. This means that each retaining element two adjacent Cuffs secure. The holding element itself, as already mentioned, attached to the studs of the heat shield and attached to the base plate with appropriate nuts. The Holding element according to the invention can thus be configured so that, as already mentioned, also as a holder serves for the cover.

By inventively proposed construction can the individual components are manufactured independently and in be securely mounted. This also results in terms of the manufacturing process to be selected and the desired materials a high degree of flexibility.

In the following the invention will be described by means of an embodiment in conjunction with the drawing. Showing:

Fig. 1
an embodiment of the combustion chamber head according to the prior art,
Fig. 2
a simplified side sectional view of an embodiment according to the invention of a combustion chamber with the combustion chamber head according to the invention,
Fig. 3
an enlarged partial view of the combustion chamber shown in Fig. 2 head,
Fig. 4
a sectional view taken along the line AA of Fig. 3,
Fig. 5
a partial perspective view of the upstream portion of the base plate with sleeve and retaining elements, and
Fig. 6
a simplified side sectional view through the base plate and the heat shield, wherein the attachment of the heat shield is shown by the studs.

1 shows a known from the prior art embodiment, in which an outer combustion chamber wall 2 and an inner combustion chamber wall 3 integral with a base plate 1 (metering panel) are formed. Furthermore, it is in one piece a cowling 6 is formed with the base plate 1. A heat shield 4 is by means not shown in detail Bolt bolted to the base plate. The heat shield 4 stops at the same time a sleeve 5 (sleeve). A collar 16 of the cuff 5 is doing with the interposition of a spacer 17 biased against the base plate 1. In the cuff 5 a burner 15 is inserted.

It turns out that the assembly of such a combustion chamber head consuming and difficult. The cover 6 must be sufficient Mounting holes (not shown) have to the To realize screw connections. Continue the position of the sleeve 5 and the heat shield 4 adjusted relative to the base plate 1. This is the heat shield 4 of a disc 18 is positioned.

An inventive embodiment is shown in FIGS to 5 described.

Fig. 2 shows a schematic side view - in section - A simplified illustrated annular combustion chamber with a outer combustion chamber wall 2 and an inner combustion chamber wall 3. Integral with the combustion chamber walls 2 and 3 is a base plate 1 formed having corresponding recesses, through which cylindrical edges 13 of a heat shield 4 are feasible (see Fig. 3 and 4).

As can be seen in particular from the representation of FIGS. 3 and 4, the edge 13 of the heat shield 4 extends in the axial direction upstream. A cuff 5 with an annular Collar 14 lies on the edge 13 of the heat shield 4 at. The collar 14 is, as already mentioned, in its diameter designed so that they have a lateral displacement of the Cuff 5 relative to the base plate 1 and the Heat shield 4 allows without the risk of cooling air leakage consists.

As can be seen in particular from FIG. 5, the heat shield has 4 more stud bolts 7 (of which in Fig. 5 only a few to Clarification of the illustration are shown). The studs 7 pass through recesses of the base plate 1 and the base areas of holding elements 8, so that a common screw the holding elements 8 and the heat shield 4 on the base plate 1 takes place.

Fig. 6 shows a sectional view, similar to Fig. 4, wherein however, the cutting plane through at least one of the stay bolts 7 of the heat shield 4 is placed to the screw of the Heat shield 4 by means of the stud bolt 7 on the base plate. 1 to illustrate the interposition of the holding element 8.

At their central area, the holding elements 8 each have a stud 9, which, as shown in Fig. 4, for attachment the cover 6 is used.

On the base plate 1 annular grooves 11 are formed (s. Fig. 5), in each of which an edge 10 of the cover 6 can be used is (Fig. 3).

As is apparent from the illustration of Fig. 4, the base plate in a known manner with a plurality of cooling air openings 12 provided. By inventively provided construction there are sufficient gaps to the Supply cooling air to the heat shield 4.

As can be seen from the figures, is in the inventive Combustion chamber head provided that cooling air through recesses the cover 6 both directly through the cooling air openings 12th the base plate 1 is supplied to the heat shield 4, as well in the region of the sleeve 5 through from the edge 13 of the heat shield 4 and the collar 14 of the sleeve 5 below the Holding member 8 formed spaces 19 through the cooling air openings 12 of the base plate 1 the heat shield 4 fed becomes.

The proposed construction according to the invention thus allows a simplified assembly of the sleeves by the possibility disassembly of the cover. Furthermore, the Cooling air for the heat shield close to the central bore be introduced in the heat shield. This can be all Apply heat to the heat shield areas with efficient cooling. Furthermore, a heat shield construction is made possible the one introduced between the heat shield and the base plate Air mass flow the entire rear heat shield surface can be passed over to the outside then as a starter film for the combustion chamber walls serve. The advantages are therefore on the one hand in a simplified Mounting, resulting in a significant cost savings leads, on the other hand, in a better cooling of the heat shield, through which an increased life and the Possibility of cooling air saving results. The comparison Cooling air saved for the state of the art, for example be integrated in the combustion process, resulting in a additional pollutant reduction results.

The invention is not limited to the embodiment shown limited, but rather arise within the scope of the invention various modifications and modifications.

In summary, the following can be stated:

The invention relates to a combustion chamber head for a Gas turbine, with at least one combustion chamber wall 2, 3, a Base plate 1, at least one heat shield 4, at least one Cuff 5 and a cover 6, characterized that the base plate 1 integral with the outer 2 and the inner 3 combustion chamber wall is formed, that the heat shield 4 from the downstream side of the base plate 1 at this is stored that the cuff 5 from the upstream Side is mounted on the base plate 1 and that the Cover 6 is releasably secured to the base plate 1.

LIST OF REFERENCE NUMBERS

1
baseplate
2
outer combustion chamber wall
3
inner combustion chamber
4
heat shield
5
cuff
6
cover
7
Stud bolt 4
8th
retaining element
9
Stud bolt 8
10
Edge 6
11
Groove 1
12
Cooling air opening 1
13
Edge 4
14
Collar 5
15
burner
16
collar
17
spacer
18
disc
19
gap

Claims (8)

  1. Combustion chamber head for a gas turbine with at least one combustion chamber wall (2, 3), a metering panel (1), at least one heat shield (4), at least one sleeve (5) and a cowling (6), characterized in that the metering panel (1) forms one part with the combustion chamber outer wall (2) and the combustion chamber inner wall (3), in that the heat shield (4) is located on the metering panel (1) from the downstream side of the metering panel (1), in that the sleeve (5) is mounted to the metering panel (1) from the upstream side, and in that the cowling (6) is separably attached to the metering panel (1), in that each retainer (8) holds two adjacent sleeves (5), in that at least one stud bolt (9) is provided on the retainer (8) for the attachment of the cowling (6), and in that cooling air is routed to the heat shield (4) through recesses in the cowling (6) both directly via the cooling air holes (12) of the metering panel (1) and, in the area of the sleeve (5), through interspaces (19) formed by the rim (13) of the heat shield (4) and the collar (14) of the sleeve (5) beneath the retainer (8) via the cooling air holes (12) of the metering panel (1), the cooling air being used, on its further route, as starter film for further cooling the combustion chamber wall (3).
  2. Combustion chamber head in accordance with Claim 1, characterized in that the heat shield (4) is provided with stud bolts (7) which can be inserted in recesses of the metering panel (1).
  3. Combustion chamber head in accordance with Claim 1 or 2, characterized in that the sleeve (5) is attached to the metering panel (1) by means of retainers (8).
  4. Combustion chamber head in accordance with Claim 3, characterized in that the retainers (8) are attached to the stud bolts (7) of the heat shield (4).
  5. Combustion chamber head in accordance with one of the Claims 1 to 4, characterized in that the rim (10) of the cowling (6) is accommodated in a groove (11) of the metering panel (1).
  6. Combustion chamber head in accordance with one of the Claims 1 to 5, characterized in that the metering panel (1) is provided with cooling air holes (12).
  7. Combustion chamber head in accordance with one of the Claims 1 to 6, characterized in that the heat shield (4) has a rim (13) which extends in the upstream direction and is passable through a recess in the metering panel (1) and at which a collar (14) of the sleeve (5) abuts.
  8. Combustion chamber head in accordance with Claim 7, characterized in that the height of the rim (13) is sized such that sufficient space for the passage of cooling air for the cooling of the heat shield (4) is provided.
EP20010122467 2000-10-02 2001-09-20 Combustion chamber head of a gas turbine Expired - Fee Related EP1193451B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE10048864 2000-10-02
DE2000148864 DE10048864A1 (en) 2000-10-02 2000-10-02 Combustion chamber head for a gas turbine

Publications (3)

Publication Number Publication Date
EP1193451A2 EP1193451A2 (en) 2002-04-03
EP1193451A3 EP1193451A3 (en) 2002-05-15
EP1193451B1 true EP1193451B1 (en) 2005-01-26

Family

ID=7658490

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20010122467 Expired - Fee Related EP1193451B1 (en) 2000-10-02 2001-09-20 Combustion chamber head of a gas turbine

Country Status (3)

Country Link
US (1) US6679063B2 (en)
EP (1) EP1193451B1 (en)
DE (1) DE10048864A1 (en)

Cited By (3)

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US7681398B2 (en) 2006-11-17 2010-03-23 Pratt & Whitney Canada Corp. Combustor liner and heat shield assembly
US7721548B2 (en) 2006-11-17 2010-05-25 Pratt & Whitney Canada Corp. Combustor liner and heat shield assembly
US7748221B2 (en) 2006-11-17 2010-07-06 Pratt & Whitney Canada Corp. Combustor heat shield with variable cooling

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US7861530B2 (en) * 2007-03-30 2011-01-04 Pratt & Whitney Canada Corp. Combustor floating collar with louver
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DE102014213302A1 (en) * 2014-07-09 2016-01-14 Rolls-Royce Deutschland Ltd & Co Kg Combustion chamber of a gas turbine with screwed combustion chamber head
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Publication number Priority date Publication date Assignee Title
US7681398B2 (en) 2006-11-17 2010-03-23 Pratt & Whitney Canada Corp. Combustor liner and heat shield assembly
US7721548B2 (en) 2006-11-17 2010-05-25 Pratt & Whitney Canada Corp. Combustor liner and heat shield assembly
US7748221B2 (en) 2006-11-17 2010-07-06 Pratt & Whitney Canada Corp. Combustor heat shield with variable cooling

Also Published As

Publication number Publication date
US6679063B2 (en) 2004-01-20
EP1193451A3 (en) 2002-05-15
EP1193451A2 (en) 2002-04-03
DE10048864A1 (en) 2002-04-11
US20020038549A1 (en) 2002-04-04

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