EP1591724A1 - Spaltdichtelement für einen Hitzeschild - Google Patents
Spaltdichtelement für einen Hitzeschild Download PDFInfo
- Publication number
- EP1591724A1 EP1591724A1 EP04010306A EP04010306A EP1591724A1 EP 1591724 A1 EP1591724 A1 EP 1591724A1 EP 04010306 A EP04010306 A EP 04010306A EP 04010306 A EP04010306 A EP 04010306A EP 1591724 A1 EP1591724 A1 EP 1591724A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat shield
- gap
- sealing element
- elements
- gap sealing
- 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
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/007—Continuous combustion chambers using liquid or gaseous fuel constructed mainly of ceramic components
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M5/00—Casings; Linings; Walls
- F23M5/04—Supports for linings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M2900/00—Special features of, or arrangements for combustion chambers
- F23M2900/05005—Sealing means between wall tiles or panels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R2900/00—Special features of, or arrangements for continuous combustion chambers; Combustion processes therefor
- F23R2900/00012—Details of sealing devices
Definitions
- the present invention relates to a gap sealing element for Sealing the gaps between peripheral surfaces one another adjacent heat shield elements and one with such Hatching plate equipped heat shield.
- the walls of high temperature reactors e.g. the walls of pressurized gas turbine combustors with a suitable thermal shielding of its supporting Structure to be protected against hot gas attack.
- the thermal shielding may e.g. be achieved by that to be protected from the hot gas wall by a Variety of individualized in their size Heat shield elements is lined.
- Ceramic materials lend themselves to the construction of a Heat shield in comparison to metallic materials due to their high temperature resistance, Corrosion resistance and low thermal conductivity ideally. Because of material typical Thermal expansion properties and in the context of operation typically occurring temperature differences, such as between the ambient temperature at standstill Gas turbine combustion chamber and the maximum temperature at Full load, the thermal mobility must be ceramic Heat shields as a result of temperature-dependent strain be assured so that no destructive the heat shield Thermal stresses due to obstruction of the temperature-dependent Elongation occur. Between the individual ceramic Heat shield elements are therefore Dehnspalte available to the Allow thermal expansion of the heat shield elements. Out For safety reasons, the expansion gaps are designed so that the never completely at maximum hot gas temperature are closed.
- the ceramic heat shield elements have a hot gas facing hot side and one of the support structure zuillerende Cold side up. They are typically by means of Retaining elements attached to a support structure. Grab it Engaging portions of the holding elements in grooves, which in between the hot side and the cold side Peripheral surfaces of the heat shield elements are formed.
- the Holding elements also have holding sections by means of which they connected to the support structure, for example, screwed, be so that the heat shield elements by means of Holding elements are fixed to the support structure.
- the penetration of To avoid hot gas in the Dehnspalte - one speaks in this connection of blocking the expansion column - is that Rinsing the expansion gaps with sufficient air, the so-called cooling or blocking air.
- the support structure typically Cooling air openings, through the cooling air in the expansion column can flow.
- EP 1 302 723 A1 a combustion chamber lining with Heat shields described in which flow barriers arranged in the expansion gaps between the heat shield bricks are to the penetration of hot gas in the Dehnspalte too Reduce.
- the heat shields of this Combustor lining have grooves on their peripheral surfaces in which one in the gap between two heat shields arranged flow barrier engages.
- the Flow barriers are made by means of retaining anchors in the expansion gap fixed.
- the first object is achieved by a gap sealing element Claim 1 and the second task by a heat shield solved according to claim 10.
- An inventive gap sealing element for sealing Includes gaps between adjacent heat shield elements at least one elastic section, which is such designed to exert a spring force that in a gap between adjacent heat shield elements inserted gap sealing element by means of a press fit in the gap is held.
- the gap sealing element according to the invention can in particular such as for sealing gaps between each other opposite and each having a groove Peripheral surfaces of adjacent heat shield elements designed be it in the grooves of the circumferential surfaces one another adjacent heat shield elements sealing the gap so to insert that part of it in the groove of the one Peripheral surface and another part in the groove of opposite peripheral surface is arranged.
- Flow barriers have the inventive Gap sealing an alternative form of attachment. While the flow barriers in the prior art means Retaining anchors need to be attached, need the Slit sealing elements according to the invention only in the column and / or the grooves between the heat shield elements to be used. In the columns and / or in the grooves they are then held by means of clamping fit. Retaining anchors and corresponding counterparts for fixing the retaining anchor are therefore not necessary in the gap sealing element according to the invention.
- the gap sealing elements according to the invention are avoided the contact between the hot gas and the holding elements above the retaining elements in the column or grooves used.
- the spring force of the resilient sections is included chosen so that they are for a secure press fit necessary clamping force provides.
- the Dimensions of the gap sealing element chosen such that the thermal expansion of the heat shield elements not hindered so that neither in the gap sealing element nor in the ceramic impermissible tensions due to the reduction of Dehnspaltab distren arise.
- Gap sealing element designed such that the at least a resilient section has a camber, which in the direction of the spring force for producing the clamping seat projects.
- the bulge can then have a support section form, which acts on a groove wall, for example.
- the groove wall which to the support structure facing portion of Hitzeschildiatas heard, and the gap sealing element against the opposite groove wall, i. against the wall of the Gas turbine combustor facing section of the Heat shield element pushes.
- the curvature instead of on the groove wall, which to the the Support structure facing portion of the heat shield element also belongs to the supporting structure.
- the gap sealing element preferably designed such that it is not up to the groove bottoms of the grooves extends.
- the elastic Section a curvature, which is perpendicular to the direction of Spring force for producing the clamping seat protrudes.
- the Gap-sealing element can in particular two support sections for Supporting on the groove bottoms of the grooves include, through the domed elastic section joined together are.
- the curvature can in particular a profile possess, which approximated a circle with an opening angle ⁇ and a curvature radius R equivalent.
- the opening angle includes preferably a value in the range of 50 ° to 60 °, the Radius R is a value in the range of 30 to 40 mm and the Camber radius L a value in the range of 8 to 10 mm.
- the material thickness in the region of the curvature can be larger be than in the other areas of the gap sealing element.
- the gap sealing element according to the just described Design has a particularly high sealing effect.
- the Spring force is to be chosen so that they are for a secure clamping can apply necessary clamping force,
- neither in the spring element nor in the ceramic impermissible Tensions arise when the adjacent ceramic Heat shield elements expand due to high temperatures and the support sections of the gap sealing element to each other to move.
- An inventive heat shield on a supporting structure for Protection of the support structure and / or a support structure comprehensive or connected to the support structure wall against a hot gas includes a number under gap deposition adjacent heat shield elements, in particular can be configured as ceramic heat shield elements. According to the invention, in the gaps between each other opposite heat shield elements according to the invention Gap sealing elements arranged.
- the cooling / sealing air consumption of a gas turbine combustion chamber can be reduced. This lowers the combustion temperature and reduces the thermal stress in the ceramic heat shields. As a result, the NO x emissions and the stress of the ceramic heat shields are reduced.
- the heat shield elements can restrict the expansion gaps and having grooves provided peripheral surfaces, wherein a Gap sealing element sealing a gap in each case in such a way the grooves of the gap limiting peripheral surfaces to insert that part of it in the groove of the one Peripheral surface and another part in the groove of opposite peripheral surface is arranged.
- Heat shield acts the spring force producing the clamping seat between the support structure and each of the hot side Slot wall of the slots acts in an alternative embodiment the spring force between the cold side groove walls and the hot side groove walls, in particular the cold side Groove walls and the hot side groove walls of the same groove.
- the clamping seat acts producing spring force between the groove bottoms of two each other opposite grooves. The last two alternatives allow a favorable flow of cooling air in the expansion gap, since no portion of the gap sealing element in between the Support structure and the groove located area of the expansion gap needs to intervene.
- the heat shield according to the invention has the support structure cooling air openings for supplying a Cooling fluid in the direction of the gap sealing elements.
- the cooling air openings can with the gap sealing elements Impinging jets are blown to cool them.
- the outflowing Baffle air is used in addition to convective cooling.
- Fig. 1 shows a first embodiment of the Slit sealing element according to the invention.
- Fig. 2 shows the gap sealing element of Figure 1 in a Heat shield built-in condition.
- Fig. 3 shows a second embodiment of the Slit sealing element according to the invention.
- Fig. 4 shows the gap sealing element of Figure 3 in a Heat shield built-in condition.
- Fig. 5 shows a third embodiment of the Slit sealing element according to the invention.
- Fig. 6 shows the gap sealing element of Figure 5 in a Heat shield built-in condition.
- Fig. 7 shows a fourth embodiment of the Slit sealing element according to the invention.
- Fig. 8 shows the gap sealing element of Figure 7 in a Heat shield built-in condition.
- Fig. 9 shows a fifth embodiment of the Slit sealing element according to the invention
- Fig. 10 shows the gap sealing element of Figure 9 in a Heat shield built-in condition.
- Fig. 11 shows the cooling air flow along a ceramic Heat shield element using a novel Gap sealing element.
- FIG. 1 shows a first embodiment of the inventive gap sealing element in a perspective View.
- the gap sealing element 10 comprises a metallic Sealing plate 12 and a curved metal strip 14, whose both ends 15 are attached to the sealing plate 12, for example. by being welded to the sealing plate 12.
- the curved metal strip 14 forms a resilient Projection, which after installation of the gap sealing element 10th in a heat shield for a press fit of Gap sealing element 10 ensures.
- FIG. 1a An alternative embodiment of that shown in Fig. 1 Sealing element shows Fig. 1a.
- Sealing element 10a is the curved metal strip 14a instead of its ends 15a in the middle 17a with the sealing plate 12a connected. Its free ends 15a form spring elements, which after the installation of the gap sealing element 10a in a Heat shield for a clamping fit of the gap sealing element 10a to care.
- FIG. 1 Another alternative embodiment of that shown in Fig. 1 Sealing element, Fig. 1b.
- Sealing element 10b is the curved metal strip 14b as the Metal strip 14 formed in Fig. 1.
- Metal strip 14 it is not at both ends 15b, 15c welded to the sealing plate 12b, but only at one End 15b.
- the other end 15c is loose and can at the Slide sealing plate 12b along.
- the arched metal strip 14b, as in FIG. 1, forms a spring-elastic projection, which after the installation of the gap sealing element 10b in a Heat shield for a clamping fit of the gap sealing element 10b provides.
- metal strip 14 or 14a can also be present two separate metal strips, the one half of the metal strip 14 and des Metal strip 14a correspond and at the edge or in the middle the sealing plate 12 and 12a are welded.
- FIG. 2 shows the gap-sealing element 10 of the first Embodiment in built in a heat shield Status.
- the figure shows a ceramic heat shield element 16, which by means of metallic element holder 18 at the Supporting structure 20 is attached to a gas turbine combustor.
- the heat shield element 16 has one of the support structure 20 zuitchde cold side 22 and one in the hot gas in the Gas turbine combustor facing hot side 24 on.
- Between the hot side 24 and the cold side 22 extend first circumferential surfaces 26 and second peripheral surfaces 28, wherein the first peripheral surfaces of the second Circumferential differ in that they have a groove 30th in which an engagement portion (in the figure not visible) of the element holder 18 for holding the ceramic heat shield element 16 engages.
- circumferential surfaces 28 are as a rule groove-free educated.
- the metallic support members 18 each in addition to the engagement portion for engaging in the groove 30 of the Heat shield element 16 a mounting portion (not shown) for insertion into a groove 32 of the support structure 20th on.
- the mounting portions are then fixed for example by means of screws, in particular on Bottom of the groove 32.
- the ceramic heat shield elements 16 arranged so comprehensively that they are with their Circumferential surfaces 26, 28 adjoin one another, wherein between the adjoining peripheral surfaces remain expansion column, so that the heat shield elements 16 at the transition from cold in the hot (operating) state can expand.
- the dimension of the expansion column is dimensioned such that neighboring heat shield elements 16 even in the hottest State not collide, so tensions, which too Cracks could lead to avoid.
- the of the first peripheral surfaces 26 extend limited expansion column usually at radially symmetrical combustion chambers - but not necessarily - in the circumferential direction of the combustion chamber and the expansion gaps bounded by the second peripheral surfaces in the axial direction of the combustion chamber.
- Figure 2 is the For clarity, only one heat shield element 16 of the Heat shield shown.
- the Cleavage sealing elements 10 In those expansion columns of the heat shield, by two first peripheral surfaces 26 are limited, are the Cleavage sealing elements 10 according to the invention arranged to prevent hot gas from passing from the hot side 24 through the Stretching column in the direction of the support structure 20 can flow.
- a portion of the sealing plate 12 of the gap sealing elements 10 engages, as shown in Figure 2, while in the groove 30 a first expansion gap bounding peripheral surface 26 of a ceramic heat shield element 16, whereas a another portion of the sealing plate 12 in the groove of opposite first peripheral surface of another ceramic heat shield element (not shown) intervenes.
- the gap sealing element 12 is by means of a press fit in fixed in position.
- the dimensions of the sealing plate 12 are chosen so that the Side surfaces 13 of the sealing plate 12, the groove bottom 31 of the grooves 30, even if the heat shield elements 16 have their largest thermal expansion. This can be prevented that the gap sealing element or the ceramic heat shield elements 16 are damaged.
- the gap sealing element 10 is made of metal, can the temperatures of the combustion chamber through the Dehnspalte the sealing plate 12 flowing hot gas not without be further exposed.
- cooling holes 34 available through the the sealing plate 12 is blown with cooling air.
- the blown cooling air flows along the sealing plate 12th in the direction of between the second peripheral surfaces 28th existing expansion column and enters through this in the Combustion chamber of the gas turbine, wherein the between the second peripheral surfaces 28 located Dehnspalte against the Entry of hot gas shut off.
- the cooling air flow is will be explained in more detail later with reference to FIG.
- Gap sealing element 110 includes as shown in FIG Gap sealing element 10 a sealing plate 112. In contrast to first embodiment, however, are to the sealing plate 112 two curved metal strips 114, which are elastic are formed and a spring force for a clamping fit of Gap sealing element 110 provide, by far welded side by side.
- FIG. 4 shows the gap-sealing element 110 of the second Embodiment after installation in a ceramic Heat shield, which except for the gap sealing element 110 in Essentially with reference to FIG. 2 described Heat shield corresponds.
- the ceramic heat shield elements 16, the support structure 20 and the holding elements 18th do not differ from the heat shield elements 16, the Support structure 20 and the support members 18 of the reference to The first embodiment described heat shield. Structures that are not different from those shown in FIG Structures are therefore different with the same Reference numeral as indicated in Figure 2.
- the gap seal member 110 is inserted into the grooves 30 of opposite circumferential surfaces 26 so as to be pressed against the groove walls 33 of the hot side portions of the ceramic heat shield members 16 and does not contact the groove bottoms 31.
- the domed metal strips 114 do not abut the support structure 20 to make the press fit. Instead, they are supported on the groove walls 35 of the cold side portions of the heat shield members 16 to press the sealing plate 112 against the groove walls 33 of the hot side portions of the ceramic heat shield members 16 by their spring force. Due to the spring force, the gap sealing element 110 is securely fixed in the grooves 30 of the ceramic heat shield elements 16 by means of a clamping fit, which acts between the groove walls 35 and the groove walls 33.
- the gap sealing element 110 is blown with cooling air, which exits through cooling air holes 134 in the support structure. Since the curved metal strips 114 in the second embodiment obstruct the cooling air flow through the expansion gaps less than the extending to the support structure 20 metal strip 14 of the first embodiment, the cooling air consumption can be further reduced compared to the first embodiment.
- FIG. 5 shows the gap-sealing element 210 of the third Embodiment in a perspective view
- Figure 6 the gap sealing element of Figure 5 after Represents installation in a ceramic heat shield.
- the ceramic heat shield corresponds to the exception Gap sealing element 210 substantially with respect to the first embodiment described heat shield. Structures of the heat shield similar to those with reference to FIG. 2 therefore correspond with described structures the same reference numerals as in Fig. 2 designates.
- the gap sealing member 210 of the third embodiment essentially corresponds to a sealing plate 214, the one Profile with bent in a first direction of expansion A. Profile course and in a second, the first Extension direction vertical extension direction B straight Profile profile has. It points in the direction of extension A Ends 212, which are both bent in the same direction and its bend in a semi-circular course have.
- the bent ends 212 form support sections, which in the installed state (see Figure 6) over a large area the groove bottoms 31 of the grooves 30 opposite each other Surrounding surfaces 26 abut.
- the support portions 212 are in Expansion direction A over a curved spring portion 214 connected with each other.
- the domed spring portion 214 has a cross-section, which is a substantially Circle section with the radius R and the opening angle ⁇ corresponds, wherein the curvature with respect to the curvature of Bend the support portions 212 another sign has.
- the gap sealing element 210 which consists of a metal sheet with has a constant thickness of about 1 mm, points due to its curved spring portion 214 elastic properties on.
- the gap sealing element 210 in opposing grooves of Heat shield elements 16 is inserted, so leads the Spring force of the spring portion 214 to the that Support portions 212 against the groove bottoms 31 of the grooves 30th are pressed, so that the gap sealing element 210 with Clamp seat is fixed in the grooves.
- the Heat shield elements 16 expand due to high temperatures and therefore the groove bottoms 31 of the grooves 30 towards each other move, so the gap sealing element 210 due to the resilient properties of the spring portion 214 be compressed.
- the spring elasticity of the gap sealing element 210 depends on Radius R of the arched spring portion 214, from Opening angle ⁇ of the curved spring portion 214, of the Material thickness of the gap sealing element 210 and of a Lever L off.
- the lever L results as the distance of the Center of the curved spring portion 214 of a imaginary connecting line between the support sections 212, those points of the support portions 212 with each other connects, at which when heating the heat shield elements 16th the heat shield element compressing force vectors attack.
- the Radius R of the domed spring portion 214 is large in comparison to the distance between the support portions 212. Accordingly is the opening angle ⁇ relatively small.
- the material thickness the gap sealing element 210 is over the entire Cross section of the element constant and is about 1 mm. Of the Lever L is also about 1 mm.
- FIG. 7 shows the gap-sealing element 310 of the fourth Embodiment in a perspective view
- Figure 8 the gap sealing element 310 of Figure 7 after the installation in a ceramic heat shield represents.
- the ceramic heat shield corresponds to the exception Gap sealing element 310 substantially with respect to the first embodiment described heat shield. Structures of the heat shield similar to those with reference to FIG. 2 therefore correspond with described structures the same reference numerals as in Fig. 2 designates.
- the gap sealing element 310 shown in FIG. 7 is similar in FIG its basic structure that shown in Figure 5 Gap sealing element 210. Like this, it has two curved ones Support sections 312, which over a curved Spring section 314 are interconnected. Compared to the curved spring portion 214 of the gap sealing element 210 from the third embodiment, the curved Spring portion 314 of the gap sealing element 310 a Cross section with a smaller radius of curvature R, one larger opening angle ⁇ and a larger lever L. In addition, the cross section of the support portions 312 is not more semi-circular as the gap sealing element 210 from the Figures 5 and 6.
- the Material thickness of the gap sealing element 310 corresponds to Essentially the gap sealing element 210 of the third Embodiment.
- the Gap sealing element 310 in opposite orientation in the grooves 30 of the ceramic heat shield elements 16th used (see Figures 6 and 8). While at Gap sealing element 210 in the inserted state, the curvature of curved spring portion 214 in the direction of the Retaining elements 18 protrudes and the support portions 212 in Direction to the support members 18 are bent, bulges the domed spring portion 314 in the fourth Embodiment of the holding elements 18 away, and the Supporting portions 312 of the gap sealing element 310 are in inserted state of the holding elements 18 bent away.
- the support sections 312 are also not so large on the groove bottoms 31, as the support portions 212 of the third Embodiment. The plant is limited at the Support portions 312 of the fourth embodiment in Essentially on the the hot side section of the Heat shield element facing portions of the groove bottom 31st
- the Gap sealing element 310 has a lower rigidity.
- the groove bottoms 31 due to the Thermal expansion of the heat shield elements 16 towards each other move, in the gap sealing element 310 generates less voltages as in the gap sealing element 210.
- FIG. 9 shows the gap sealing element 410 of the fifth Embodiment in a perspective view
- Figure 10 the gap sealing element 410 of Figure 9 after the installation in a ceramic heat shield represents.
- the ceramic heat shield corresponds to the exception Gap sealing element 410 substantially with respect to the first embodiment described heat shield. Structures of the heat shield similar to those with reference to FIG. 2 therefore correspond with described structures the same reference numerals as in Fig. 2 designates.
- the gap sealing element 410 has the same as the gap sealing elements 210 and 310 of the third and the fourth embodiment a curved spring portion 414 and two support portions 412 on.
- the domed spring portion 414 has a Radius of curvature, which is about that of the fourth Embodiment corresponds.
- the opening angle ⁇ and the Lever L are significantly larger than the fourth Embodiment.
- the support portions 412 are in the fifth Embodiment merely as kinking edges of the Gap sealing element 410 formed. They only have one slight curvature on the contour of the groove bottom 31st is adapted (see Figure 10).
- the material thickness of the gap sealing element 410 along the Extension direction A is not constant, but points in the Center of the arched spring portion 414 with about 1.2 mm the largest material thickness.
- Towards the Support sections 412 decreases the material thickness from linear and reaches approximately one value near the support portions 412 of 0.6 mm.
- Along the expansion direction B is the Material thickness as in the embodiments three and four constant.
- the gap sealing element 410 is used with the same orientation the gap sealing element 310 of the fourth embodiment in the grooves 30 of the ceramic heat shield elements 16 of a Hiteschildes used.
- the Support portions 412 substantially in the direction of the Groove wall 35 of the cold side portion of Heat shield elements 16 pushed towards the groove bottom 31 at.
- the arched spring section 414 spans the Engagement portions of the holding elements 18 practically Completely.
- the geometry of the fifth embodiment has a particularly good sealing function as well as particularly favorable Stiffness and tension properties.
- the radius of curvature R of the domed Spring section 414 in the range between 30 and 40 mm, preferably at about 35 mm, the opening angle in the range between 50 ° and 60 °, preferably at about 56 °, and the lever in the range between 8 and 10 mm, preferably at about 9 mm.
- the material thickness of the gap sealing element 410 decreases from approx. 1.2 mm in the center of the arched spring section to approx. 0.6 mm at the edge of the curved spring portion 414 from. In the area the support sections 412 then takes the material thickness again something to.
- FIG. 11 The flow conditions along a ceramic Heat shield element 16 with built-in gap sealing element are shown in FIG. In FIG. 11 is a Gap sealing element of the fifth embodiment installed. However, it could also gap sealing elements of the rest Be incorporated embodiments.
- each Cooling air openings 34 in the support structure 20 in the region of by first peripheral surfaces 26 limited expansion gap of the ceramic heat shield is cooling air to the appropriate Gap sealing elements 410 blown.
- the cooling air flows essentially deflected at right angles so that they below the gap sealing element 410 parallel to Gap sealing element 410 flow.
- the cooling air flows an expansion gap between two opposite ones reach second peripheral surfaces 28, they enter into this Expansion gap and change its direction of flow again by approx. 90 °, so that you are back from the support structure 20 to flow away, i. towards the gas turbine combustor.
- the expansion gaps between two opposite second peripheral surfaces 28 through the Cooling air against the penetration of hot gas from the Gas turbine combustion chamber shut off.
- the flow conditions along the ceramic heat shield elements also of the shape of the Gap sealing elements and of the arrangement of Depend on outlet openings 34 for the cooling air streams.
- Gap sealing elements 410 according to the fifth embodiment Use find and the support structure 20 in the area between the element holders 18 contains six cooling air openings 34, the extending linearly between the element holders 18, a Outlet opening of about 2.25 mm and about 3.8 mm spaced apart from each other. It is assumed that the ceramic heat shield elements a square structure with an edge length of 200 mm and a thickness of 38 mm exhibit.
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
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- Exhaust Silencers (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
Description
Auch im zweiten Ausführungsbeispiel wird das Spaltdichtelement 110 mit Kühlluft angeblasen, die durch Kühlluftbohrungen 134 in der Tragstruktur austritt. Da die gewölbten Metallstreifen 114 im zweiten Ausführungsbeispiel die Kühlluftströmung durch die Dehnspalte weniger behindern als der sich bis zur Tragstruktur 20 erstreckende Metallstreifen 14 des ersten Ausführungsbeispiels, kann der Kühlluftverbrauch im Vergleich zum ersten Ausführungsbeispiel weiter vermindert werden.
Claims (17)
- Spaltdichtelement zum Abdichten von Spalten zwischen benachbarten Hitzeschildelementen (16) eines Hitzeschildes, dadurch gekennzeichnet , dass das Spaltdichtelement (10; 110; 210; 310; 410) mindestens einen federelastischen Abschnitt (14; 114; 214; 314; 414) umfasst, welcher derart zum Ausüben einer Federkraft ausgestaltet ist, dass das in einen Spalt zwischen benachbarten Hitzeschildelementen (16) eingesetzte Spaltdichtelement (10; 110; 210; 310; 410) mittels Klemmsitz im Spalt gehalten wird.
- Spaltdichtelement nach Anspruch 1, dadurch gekennzeichnet, dass es zum Abdichten von Spalten zwischen einander gegenüberliegenden und jeweils eine Nut (30) aufweisenden Umfangsflächen (26) benachbarter Hitzeschildelemente (16) derart ausgestaltet ist, dass es in die Nuten (30) der Umfangsflächen (26) einander benachbarter Hitzeschildelemente (16) den Spalt abdichtend derart einzusetzen ist, dass ein Teil von ihm in der Nut der einen Umfangsfläche (26) und ein anderer Teil in der Nut (30) der gegenüberliegenden Umfangsfläche (26) angeordnet ist.
- Spaltdichtelement nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der mindestens eine federelastische Abschnitt (14; 114) eine Wölbung aufweist, welche in die Richtung der Federkraft zum Herstellen des Klemmsitzes vorspringt.
- Spaltdichtelement nach Anspruch 2 und Anspruch 3, dadurch gekennzeichnet, dass es eine Abmessung aufweist, die derart gewählt ist, dass es sich im heißesten Zustand der Hitzeschildelemente (16) nicht bis zu den Böden (31) der Nuten (30) der Umfangsflächen (26) erstreckt.
- Spaltdichtelement nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der mindestens eine federelastische Abschnitt (214; 314; 414) eine Wölbung aufweist, welche senkrecht zur Wirkrichtung der Federkraft zum Herstellen des Klemmsitzes vorspringt.
- Spaltdichtelement nach Anspruch 2 und Anspruch 5, dadurch gekennzeichnet, dass es zwei einander gegenüberliegende Stützabschnitte (212; 312; 412) zum Abstützen an den Nutböden (31) der Nuten (30) umfasst und der mindestens eine federelastische Abschnitt (214; 314; 414) die Stützabschnitte (212; 312; 412) miteinander verbindet.
- Spaltdichtelement nach Anspruch 6, dadurch gekennzeichnet, dass die Wölbung ein Profil besitzt, welches näherungsweise einem Kreisausschnitt mit einem Öffnungswinkels ϕ sowie einem Wölbungsradius R entspricht, und einen Wölbungshebel L aufweist.
- Spaltdichtelement nach Anspruch 7, dadurch gekennzeichnet, dass der Öffnungswinkel ϕ einen Wert im Bereich von 50° bis 60° besitzt, der Radius R einen Wert im Bereich von 30 bis 40 mm besitzt und der Wölbungshebel L einen Wert im Bereich von 8 bis 10 mm besitzt.
- Spaltdichtelement nach einem der Ansprüche 5 bis 8, dadurch gekennzeichnet, dass die Materialdicke im Bereich der Wölbung größer als in den übrigen Bereichen des Spaltdichtelements ist.
- Hitzeschild an einer Tragstruktur (20) zum Schutz der Tragstruktur (20) und/oder einer die Tragstruktur (20) umfassenden oder mit der Tragstruktur (20) verbundenen Wand gegen ein Heißgas, mit einer Anzahl unter Spaltbelassung aneinandergrenzender Hitzeschildelemente (16), dadurch gekennzeichnet , dass in den Spalten Spaltdichtelemente (10; 110; 210; 310; 410) nach einem der Ansprüche 1 bis 9 angeordnet sind.
- Hitzeschild nach Anspruch 10, dadurch gekennzeichnet, dass die Hitzeschildelemente (16) die Spalte begrenzende und mit Nuten (30) versehene Umfangsflächen (26) aufweisen und dass in den Nuten (30) einander gegenüberliegender Umfangsflächen (26) Spaltdichtelemente (10; 110; 210; 310; 410) nach Anspruch 2 oder nach Anspruch 2 und einem der Ansprüche 3 bis 9 angeordnet und mittels Klemmsitz gehalten sind.
- Hitzeschild nach Anspruch 11, dadurch gekennzeichnet, dass der mindestens eine federelastische Abschnitt (14; 114) der Spaltdichtelemente (10; 110) derart ausgestaltet ist, dass die den Klemmsitz herstellende Federkraft zwischen der Tragstruktur (20) und Nutwänden (33) der Nuten (30) von einen Spalt begrenzenden Umfangsflächen (26) wirkt.
- Hitzeschild nach Anspruch 11, dadurch gekennzeichnet, dass der mindestens eine federelastische Abschnitt (114) der Spaltdichtelemente (110) derart ausgestaltet ist, dass die den Klemmsitz herstellende Federkraft zwischen zwei einander gegenüberliegenden Nutabschnitten (35, 33) der Nuten (30) von einen Spalt begrenzenden Umfangsflächen (26) wirkt.
- Hitzeschild nach Anspruch 13, dadurch gekennzeichnet, dass der mindestens eine federelastische Abschnitt (114) derart ausgestaltet ist, dass die den Klemmsitz herstellende Federkraft zwischen zwei einander gegenüberliegenden Nutwänden (35, 33) derselben Nut (30) wirkt.
- Hitzeschild nach Anspruch 11, dadurch gekennzeichnet, dass der mindestens eine federelastische Abschnitt (214; 314; 414) derart ausgestaltet ist, dass die den Klemmsitz herstellende Federkraft zwischen den Nutböden (31) der Nuten (30) von einen Spalt begrenzenden Umfangsflächen (26) wirkt.
- Hitzeschild nach einem der Ansprüche 10 bis 15, dadurch gekennzeichnet, dass in der Tragstruktur (20) Kühlluftöffnungen (34) zum Zuführen von Kühlluft in Richtung auf die Spaltdichtelemente (10; 110; 210; 310; 410) vorhanden sind.
- Hitzeschild nach einem der Ansprüche 10 bis 16, dadurch gekennzeichnet, dass die Hitzeschildelemente (16) keramische Hitzeschildelemente sind.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT04010306T ATE514905T1 (de) | 2004-04-30 | 2004-04-30 | Spaltdichtelement für einen hitzeschild |
EP04010306A EP1591724B1 (de) | 2004-04-30 | 2004-04-30 | Spaltdichtelement für einen Hitzeschild |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04010306A EP1591724B1 (de) | 2004-04-30 | 2004-04-30 | Spaltdichtelement für einen Hitzeschild |
Publications (2)
Publication Number | Publication Date |
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EP1591724A1 true EP1591724A1 (de) | 2005-11-02 |
EP1591724B1 EP1591724B1 (de) | 2011-06-29 |
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EP04010306A Expired - Lifetime EP1591724B1 (de) | 2004-04-30 | 2004-04-30 | Spaltdichtelement für einen Hitzeschild |
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Cited By (9)
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WO2015031763A1 (en) | 2013-08-29 | 2015-03-05 | United Technologies Corporation | Seal for gas turbine engine |
EP2354660A3 (de) * | 2010-02-04 | 2015-03-18 | United Technologies Corporation | Abdichtungselement für Brennkammerwandsegment |
US20160131362A1 (en) * | 2013-06-27 | 2016-05-12 | Siemens Aktiengesellschaft | Securing a heat shield block to a support structure, and heat shield |
US20160238247A1 (en) * | 2015-02-12 | 2016-08-18 | Rolls-Royce Deutschland Ltd & Co Kg | Sealing of a radial gap between effusion tiles of a gas-turbine combustion chamber |
EP3101344A1 (de) * | 2015-03-30 | 2016-12-07 | United Technologies Corporation | Brennkammerplatten und konfigurationen für einen gasturbinenmotor |
WO2020148045A1 (de) * | 2019-01-17 | 2020-07-23 | Siemens Aktiengesellschaft | Brennkammer |
DE102019204746A1 (de) * | 2019-04-03 | 2020-10-08 | Siemens Aktiengesellschaft | Hitzeschildkachel mit Dämpfungsfunktion |
CN113124419A (zh) * | 2019-12-31 | 2021-07-16 | 安萨尔多能源公司 | 燃气涡轮组件及用于其燃烧室的绝热砖瓦的支承装置 |
US11408609B2 (en) * | 2018-10-26 | 2022-08-09 | Collins Engine Nozzles, Inc. | Combustor dome tiles |
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EP1022437A1 (de) | 1999-01-19 | 2000-07-26 | Siemens Aktiengesellschaft | Bauteil zur Verwendung in einer thermischen Machine |
EP1191285A1 (de) * | 2000-09-22 | 2002-03-27 | Siemens Aktiengesellschaft | Hitzeschildstein, Brennkammer mit einer inneren Brennkammerauskleidung sowie Gasturbine |
EP1260767A1 (de) | 2001-05-25 | 2002-11-27 | Siemens Aktiengesellschaft | Hitzeschildanordnung für eine Heissgas führende Komponente, insbesondere für Strukturteile von Gasturbine, sowie Verfahren zum Herstellen einer derartigen Anordnung |
US20030012643A1 (en) * | 2000-03-02 | 2003-01-16 | Peter Tiemann | Turbine installation |
EP1302723A1 (de) | 2001-10-15 | 2003-04-16 | Siemens Aktiengesellschaft | Auskleidung für Innenwände von Brennkammern |
-
2004
- 2004-04-30 EP EP04010306A patent/EP1591724B1/de not_active Expired - Lifetime
- 2004-04-30 AT AT04010306T patent/ATE514905T1/de active
Patent Citations (5)
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EP1022437A1 (de) | 1999-01-19 | 2000-07-26 | Siemens Aktiengesellschaft | Bauteil zur Verwendung in einer thermischen Machine |
US20030012643A1 (en) * | 2000-03-02 | 2003-01-16 | Peter Tiemann | Turbine installation |
EP1191285A1 (de) * | 2000-09-22 | 2002-03-27 | Siemens Aktiengesellschaft | Hitzeschildstein, Brennkammer mit einer inneren Brennkammerauskleidung sowie Gasturbine |
EP1260767A1 (de) | 2001-05-25 | 2002-11-27 | Siemens Aktiengesellschaft | Hitzeschildanordnung für eine Heissgas führende Komponente, insbesondere für Strukturteile von Gasturbine, sowie Verfahren zum Herstellen einer derartigen Anordnung |
EP1302723A1 (de) | 2001-10-15 | 2003-04-16 | Siemens Aktiengesellschaft | Auskleidung für Innenwände von Brennkammern |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2354660A3 (de) * | 2010-02-04 | 2015-03-18 | United Technologies Corporation | Abdichtungselement für Brennkammerwandsegment |
US10330318B2 (en) * | 2013-06-27 | 2019-06-25 | Siemens Aktiengesellschaft | Securing a heat shield block to a support structure, and heat shield |
US20160131362A1 (en) * | 2013-06-27 | 2016-05-12 | Siemens Aktiengesellschaft | Securing a heat shield block to a support structure, and heat shield |
EP3039269A4 (de) * | 2013-08-29 | 2016-09-07 | United Technologies Corp | Dichtung für einen gasturbinenmotor |
WO2015031763A1 (en) | 2013-08-29 | 2015-03-05 | United Technologies Corporation | Seal for gas turbine engine |
US9988923B2 (en) | 2013-08-29 | 2018-06-05 | United Technologies Corporation | Seal for gas turbine engine |
US20160238247A1 (en) * | 2015-02-12 | 2016-08-18 | Rolls-Royce Deutschland Ltd & Co Kg | Sealing of a radial gap between effusion tiles of a gas-turbine combustion chamber |
US10451279B2 (en) * | 2015-02-12 | 2019-10-22 | Rolls-Royce Deutschland Ltd & Co Kg | Sealing of a radial gap between effusion tiles of a gas-turbine combustion chamber |
EP3101344A1 (de) * | 2015-03-30 | 2016-12-07 | United Technologies Corporation | Brennkammerplatten und konfigurationen für einen gasturbinenmotor |
US10101029B2 (en) | 2015-03-30 | 2018-10-16 | United Technologies Corporation | Combustor panels and configurations for a gas turbine engine |
US11408609B2 (en) * | 2018-10-26 | 2022-08-09 | Collins Engine Nozzles, Inc. | Combustor dome tiles |
WO2020148045A1 (de) * | 2019-01-17 | 2020-07-23 | Siemens Aktiengesellschaft | Brennkammer |
US11821629B2 (en) | 2019-01-17 | 2023-11-21 | Siemens Energy Global GmbH & Co. KG | Combustion chamber |
DE102019204746A1 (de) * | 2019-04-03 | 2020-10-08 | Siemens Aktiengesellschaft | Hitzeschildkachel mit Dämpfungsfunktion |
CN113124419A (zh) * | 2019-12-31 | 2021-07-16 | 安萨尔多能源公司 | 燃气涡轮组件及用于其燃烧室的绝热砖瓦的支承装置 |
CN113124419B (zh) * | 2019-12-31 | 2024-05-24 | 安萨尔多能源公司 | 燃气涡轮组件及用于其燃烧室的绝热砖瓦的支承装置 |
Also Published As
Publication number | Publication date |
---|---|
EP1591724B1 (de) | 2011-06-29 |
ATE514905T1 (de) | 2011-07-15 |
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