WO2016016281A1 - Capot de couverture pour un alésage de passage dans un bouclier thermique et un élément de fixation pouvant être positionné dans l'alésage de passage ainsi que bouclier thermique comprenant un capot de couverture - Google Patents

Capot de couverture pour un alésage de passage dans un bouclier thermique et un élément de fixation pouvant être positionné dans l'alésage de passage ainsi que bouclier thermique comprenant un capot de couverture Download PDF

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Publication number
WO2016016281A1
WO2016016281A1 PCT/EP2015/067331 EP2015067331W WO2016016281A1 WO 2016016281 A1 WO2016016281 A1 WO 2016016281A1 EP 2015067331 W EP2015067331 W EP 2015067331W WO 2016016281 A1 WO2016016281 A1 WO 2016016281A1
Authority
WO
WIPO (PCT)
Prior art keywords
cap
cap body
heat shield
hole
fixing element
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.)
Ceased
Application number
PCT/EP2015/067331
Other languages
German (de)
English (en)
Inventor
Andreas Böttcher
Shahrzad Juhnke
Boris Ferdinand Kock
Tobias Krieger
Patrick Lapp
Andreas Mann
Kai-Uwe Schildmacher
Daniel Vogtmann
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of WO2016016281A1 publication Critical patent/WO2016016281A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • 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
    • F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B37/00—Nuts or like thread-engaging members
    • F16B37/14—Cap nuts; Nut caps or bolt caps
    • 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
    • F23R3/42—Continuous combustion chambers using liquid or gaseous fuel characterised by the arrangement or form of the flame tubes or combustion chambers
    • F23R3/60—Support structures; Attaching or mounting means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/0003—Linings or walls
    • F27D1/0033—Linings or walls comprising heat shields, e.g. heat shields
    • 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
    • F23R2900/00017—Assembling combustion chamber liners or subparts

Definitions

  • Cover cap for a penetration hole in a heat shield and a fixing element that can be positioned in the penetration hole, as well as a heat shield with a cover cap
  • the invention relates to a cap for a
  • the invention relates to a heat shield with a thermal barrier coating on its upper side and with a particular zent ⁇ ral piercing hole in which a fixing element for fixing the heat shield is positioned on a wall in the assembled state.
  • Heat shields (English: metallic heat shield - MHS) of the type mentioned ⁇ are known from the prior art. These are, for example in combustion chambers, in particular in gas turbine combustors ⁇ , for use to protect arranged in the combustion chamber components and their wall in front of the hot gas and excessive heat radiation.
  • the heat shields are provided on their upper side with a thermal barrier coating (TBC) and fastened with suitable fixing elements, for example screws, to the walls or components to be protected in such a way that their upper side provided with the thermal barrier coating penetrates into the Combustion chamber points.
  • TBC thermal barrier coating
  • suitable fixing elements for example screws
  • a heat shield when it is exposed to high temperature in a combustion chamber of more than 1000 ° C, expands ⁇ is a single, centrally provided in this Through hole advantage.
  • the shield can extend uniformly in all directions, without material loads occurring, in particular, in the case of the thermal expansion of a shield fixed to two or more suspension points.
  • the installation cost when the heat shields are attached only by means of a fixing element low.
  • the heat shields are actively cooled to withstand the extreme operating conditions in the combustion chamber. This is done by passing cooling air from the "cold" underside facing the wall of the combustion chamber to the top in the combustion chamber via openings provided in the heat shield conditions is exposed in the combustion chamber, is also actively cooled this normally. here ⁇ to channels for directing cooling air are provided in the fixing.
  • Heat shields of the aforementioned type have been proven to protect the wall in the combustion chamber and components provided therein from the high temperatures.
  • efforts are being made to operate the combustion chambers under ever more extreme conditions, above all to realize ever higher temperatures.
  • ⁇ particular can the fixing when it is formed into strong comparable, a weak spot and the heat shield may become detached from the wall.
  • Combustion chamber allows, in which heat shields of the type pre ⁇ called are used. This object is achieved by a cap for a penetration hole in a heat shield and in the
  • At least partially closed Fibonuclear and has on its upper side a thermal barrier coating
  • the basic idea of the present invention is in other words, is to protect the break-through hole, and thus the fixing member positioned in this specifically by means of a fiction, ⁇ configured according to the cap.
  • the cap according to the invention comprises a cap body, which is designed to at least partially close the penetration hole.
  • the cap body can for this purpose fundamentally ⁇ additionally have any shape that is suitable to cover the penetration hole in the above-mentioned type.
  • the cap body can be designed, for example, in such a way that it closes the through-hole completely, in particular flush. Alternatively, the cap body can only partially close the penetration hole.
  • openings are provided in the upper wall of the cap body.
  • the openings can be, for example, dimensioned such that the cap body completely closes the through hole ⁇ handle substantially. If the through-hole is not completely closed, but for example openings are provided in the cap body, then cooling air can be guided through the openings particularly well in the direction of the combustion chamber in order to actively cool the penetration hole and the fixing element by means of cooling air.
  • the openings may for example be provided in the upper wall of the cap body.
  • the openings can also serve a particularly convenient removal of the cap of the invention from the penetration hole.
  • a suitable tool can be introduced to lift the cap with the help of the penetration hole.
  • openings of the aforementioned type may be provided, but these are not required.
  • openings of the aforementioned type may be provided, but these are not required.
  • the cap according to the invention further comprises a thermal barrier coating. This is provided on the upper side of the cap body, ie on the side of the upper wall of the cap body, which points in the direction of the combustion chamber, when the cap on the through-hole
  • the thermal barrier coating may be designed to withstand temperatures of more than 1000 ° C and this may include in particular ceramic materials.
  • Thermal barrier coatings are known to be able to withstand the temperature of high-temperature applications. lying down material in a range in which the material still has sufficient strength.
  • the thermal barrier coating which can withstand, for example, temperatures of more than 1000 ° C. and more, ensures, for example, that a metal component coated with the latter is kept in the combustion chamber at a temperature of less than 800 ° C.
  • the cap according to the invention further comprises fastening means, via which the cap body can be detachably, in particular by clamping, attached to the penetration bore and / or to the fixing element.
  • fastening means via which the cap body can be detachably, in particular by clamping, attached to the penetration bore and / or to the fixing element.
  • the Cape ⁇ pen body for example, clamping, locking or sticking or other means either at the penetration hole and / or to the fixing any Fixed To ⁇ restriction means.
  • the releasable attachment ge ⁇ ensured is that the attached cap can be removed from the penetration hole again. This is for example required for maintenance, especially if the heat shield must be, for example vorü ⁇ mountains starting away for repair or replacement.
  • an invention designed according to the cap on the penetration hole or the fixing provides a surprisingly simple, inexpensive and mon ⁇ day friendly solution for the above object.
  • the fixing element positioned in the through-hole is efficiently protected from the high temperatures in the combustion chamber.
  • the fixing which for example a
  • the cap according to the invention can be easily attached to the fixing ⁇ element, the assembly or De- mounting effort of the heat shield practically not increased.
  • the cap can be retrofitted in a very simple way to exist ⁇ the heat shields. In this case, the usual standard parts can continue to be used.
  • an active cooling of the fixing element by means of cooling air can be significantly reduced or - depending on the application - completely dispensed with.
  • the cooling air mass flow entering the combustion chamber is significantly reduced compared with the prior art, which has a positive effect on the emission values.
  • Dispensing with the active cooling of the fixing pro ⁇ production costs can be reduced to a considerable extent, as usual fixing elements, such as screws, ver ⁇ applies without special cooling air ducts can be.
  • a sleeve-shaped Enriched cap body is well suited to be ge ⁇ inserted into a penetration hole of a heat shield and engage over the fixing therein protective.
  • the cap body comprises in an advantageous embodiment a plate-shaped circular top wall and an upper wall projecting from the downward annular ridge, so the shape of which is adapted in particular geeig ⁇ neter manner to the circular usually penetration bore. It can further be provided that the diameter of the annular ridge is smaller than the diameter of the upper wall, and in particular a tapered from the outer edge of the upper wall to the outside of the annular ridge portion is provided as an abutment of the cap body to an end portion the penetration hole is used.
  • a region that tapers in this way can, for example, provide a suitable, in particular precisely fitting, abutment surface for a penetration bore, which in its upper end region, that is to say the combustion chamber, has an edge which is rounded in a quarter-circle, for example.
  • the fastening means may take a circlip environmentally which surrounds the cap body at least partially on the outside and in particular at least has a portion ⁇ which projects through at least one corresponding lateral opening in the cap body inwards.
  • a locking ring is a suitable means to allow a clamping attachment of the cap on the penetration hole and / or on the fixing element.
  • the retaining ring is expediently designed to be open, so that it can be easily spread elastically in order to put it on the cap. It also consists of an elas ⁇ table resilient material, such as metal, in particular of a spring steel.
  • the circlip may have a half- or three-quarter circular section and a V-shaped inwardly bent section at each of its two ends.
  • Such an open locking ring can be obtained, for example, by bending a wire of a suitable material into a corresponding shape.
  • a circlip made of a resiliently elastic material surrounds a sleeve-shaped cap body on the outside and has portions which pass through lateral openings in the Inner space of the cap body protrude, the inwardly projecting end portions of the fixing can frictionally in An ⁇ position, so that the cap is clamped to the fixing.
  • a further embodiment of the cap according to the invention is further distinguished by the fact that it has an open towards the bottom receptacle, which is adapted to ei ⁇ NEN end portion of the fixing, in particular the head of a screw, and in particular in the receptacle down protruding projection is provided.
  • the receptacle can be configured such that it engages around the end region of the fixing element in a form-fitting manner or with play. The cover cap can then be attached particularly comfortably to the fixing element.
  • a protrusion is expedient if a fixing element for a ⁇ set comes, a recess of corresponding shape is provided in its upper end portion, so that when the Cape is pen body fixed to the penetration hole and / or on the fixing member between the projection and the Vertie ⁇ tion at least one particular annular channel for Füh ⁇ tion of cooling air is defined.
  • the projection may be, for example, conical or semi-circular in ⁇ .
  • a securing ring serves as a fastening means in the embodiment, this can protrude in particular through lateral openings in the region of the receptacle inwardly.
  • guide means are provided for guiding cooling air, which in particular comprise at least ei ⁇ nen extending through the wall of the cap body channel. This embodiment allows active cooling of the cap body of the cap according to the invention.
  • the channel or channels can be oriented arbitrarily. Closes the cap according to the invention the
  • At least one channel can extend in particular from the interior of the receptacle to the outside of the cap body.
  • cooling air can be guided from the region under the covering cap into the region above it.
  • Cooling air can also be conducted into the space extending laterally around the cap body through one or more channels in side walls of the body, in particular into the space between the inner wall of the through-hole and the lateral outer wall of the cap body.
  • the means for guiding cooling air may also comprise one or more grooves, which are provided for example on the outside of the cap body.
  • the cap body can then be formed, for example, such that itsschreibwan ⁇ tion in the groove or the grooves in abutment against the inner wall of the through-hole and so the grooves are closed by the inner wall of the penetration hole. In this way channels are used to guide
  • a further embodiment of the present invention is characterized in that the cap body of the invention To cap according to the invention made of metal and / or ceramic is made. These materials are particularly useful because they can withstand relatively ho ⁇ hen temperatures for applications in the high temperature range.
  • a heat shield with a thermal barrier coating on its upper side and with a particular central through-hole in which a fixing element for fixing the heat shield is positioned on a wall in the assembled state, and with a cap according to the invention, at the für Bachsbohrung and / or the fixing element detachably, in particular by clamping be ⁇ consolidates.
  • the cap for example, on the
  • a cap according to the invention can be dispensed with entirely, active cooling of the components, in particular the fixing element and / or the wall of the through hole ⁇ handle and / or of the cap body.
  • active cooling of one or more of these components takes place. Therefore, in a further development, as an alternative or in addition to the means for guiding cooling air provided on the covering cap according to the invention, it is also possible to provide means for admitting or guiding cooling air to the through-hole and / or the fixing element. Active cooling of penetration hole, cap body and fixing allows a particularly safe operation especially in the very high Tem ⁇ tures.
  • the mass flow of cooling air which is required to maintain predetermined temperatures of the individual components, is basically reduced compared to an operation without the cap. Accordingly, means are provided for the cooling in development of the heat shield according to the invention to admit cooling air into the through-hole, wherein the means comprise in particular channels which extend through a side wall and / or a bottom wall of the through-hole.
  • a further embodiment of the heat shield according to the invention is characterized in that a channel for guiding is in the fixing member provided at least by cooling air, wherein in particular there is provided a to mentes in the longitudinal direction of the Fixierele- extending supply channel, from which in particular at least a branch duct, in particular tan ⁇ gential or radial, branches off.
  • the feed channel can extend over the entire length of the fixing element, for example over the entire length of a screw used for use, and open into an inlet and outlet opening in the upper and lower end regions of the fixing element. In this case can
  • one or more branch channels can branch off from the supply channel which extends in the longitudinal direction. These can be provided at any point on the fixing element, in particular at its lower or upper end region, and extend tangentially or radially outward from the supply channel. Channels extending tangentially to the feed channel, which open into the lower end region of the fixing element, allow, in particular, a tangential supply of cooling air into the feed channel.
  • the tangential geometry can be as ⁇ achieved in a strudeiförmige airflow.
  • a swirl plate may be provided in a supply channel extending in the longitudinal direction through the fixing element.
  • the cap body is formed such that between the cap body and the fixing element and / or between the cap body and the penetration hole at least one channel is defined for guiding cooling air when the cap body at the penetration hole and / or attached to the fixing element.
  • the cap body is formed so that when this is fixed in the intended position on the penetration hole and / or the fixing element, between this and the ⁇ handle bore and / or between this and the fixing a gap or more spaces free stay. These spaces are used according to the embodiment specifically as channels for the guidance of cooling air. Between cap body and penetration hole and / or fixing, for example, tubular or annular channels can be out ⁇ forms.
  • a downwardly open receptacle on the Ab ⁇ over-cap may be provided which is adapted to receive at least the upper end portion of the fixing member and it may in particular between the inner wall of the receptacle and the outer wall of the fixing element at least one channel authorized to bring ⁇ tion of cooling air be defined when the cap body is attached to the penetration hole and / or on the fixing element.
  • the heat shield according to the invention may also be provided in the upper end portion of the fixing element a recess and in particular in the receptacle downwardly projecting projection be provided, which is complementary to the recess formed such that zwi ⁇ tween the projection and the Well at least one particular annular channel for guiding cooling air is defined when the cap body at the penetration hole
  • the recess may be, for example, conical. If a projection is also provided, in an advantageous embodiment this may likewise be conical, so that a conical annular channel is defined between the recess and the projection when the cap body engages the through-hole
  • the depression which is provided, for example, in the head of a screw serving as a fixing element, can be designed, for example, as a fan-shaped bore.
  • the projection and the complementarily formed recess may, for example, also be semicircular, so that a channel in the form of a hemispherical shell is defined between them.
  • Other shapes are also possible, for example, can be cylindrical or elliptical Before ⁇ jump and recess, in which case a channel corresponding shape between WAIVED is defined.
  • ⁇ hen which define a channel in which a in Longitudinal direction of the fixing element extending feed channel, so it is particularly advantageous if the cooling air is guided with swirl in the feed channel.
  • a swirl vane may be provided in the supply passage at ⁇ or is cooling air tangentially in particular ⁇ sondere introduced into the feed channel, in its lower end portion.
  • Fastening means by which the cap body in particular ⁇ sondere can be clampingly attached to the penetration hole and / or to the fixing member releasably may be provided to the cap body itself.
  • fastening means are also provided on the through-hole.
  • the fastening means provided on the through-hole may comprise a securing ring, which may then be arranged in a recess provided in the through-hole.
  • the retaining ring also in this embodiment, inwardly projecting portions on, they can be clampingly ge ⁇ into contact with the cap body when the latter is positioned in the penetration hole.
  • openings, grooves or the like can then be provided on the cap body, into which a degenerating part of a securing ring can engage.
  • a degenerating part of a securing ring can engage.
  • other fastening means may also be provided, which allow, for example, a latching or clamping attachment.
  • a further groove is provided in a further development of the invention in the upper end region of the fixing means, in the fastening means, in particular a retaining ring, can intervene.
  • the fastening means may alternatively or in addition, that they come into contact with the cap body frictionally also to the fixing member in at ⁇ position come.
  • a locking ring used as a particularly secure fit of the cap on the fixing can it be aimed ⁇ when a groove is provided on that, which is engaged by the locking ring.
  • the cap body is sleeve-shaped, wherein the retaining ring at least partially surrounds the cap body on the outside and protrudes inwardly through lateral openings in the cap body, in particular in the region of a receptacle provided on the cap body and is formed, at least the upper end portion of the fixing on ⁇ increase, such that the securing ring for fixing the cap is non-positively engageable in abutment with the fixing, in particular in the region of the groove.
  • the outer contour of the cap body is adapted to the inner contour of the through-hole in its upper end region.
  • the cover is further configured such that they supply the upper ⁇ side of the heat shield in the area of the penetration bore least essentially closes flush.
  • FIG. 1 in the sectional view of a heat shield with a central through-hole, in which a screw and a cap according to the invention are positio ⁇ ned,
  • Figures in the sectional representation furtherCSs2 to 4 forms of heat shields with through-hole
  • FIG. 10 shows a heat shield, as shown in FIGS. 3 and 4, with an alternatively designed cover cap and screw,
  • FIG 11 is detailed view of the heat shield according to the invention shown in Figure 10, the screw being ⁇ al ternatively designed
  • Figures 12-14 in FIGS. 10 and 11 show a cross section of an oblique top, bottom and top cap
  • Figure 16 is an enlarged sectional view of the recognizable in Figure 10 screw without swirl plate.
  • FIG. 1 shows a sectional view of a heat shield 1 according to the invention.
  • This comprises a main body 1 a with a flat upper section and with a heat insulating Layer 2 on the top of the main body la pointing upwards in the figure.
  • a central through-hole 3 is also provided in the base body la .
  • the heat shield is attached to a not dargestell ⁇ th in the figure 1 wall of a likewise not recognizable combustion chamber.
  • the positioned in the central through-hole 3 screw 4 is screwed into a provided in the wall of the combustion chamber, also not shown threaded bore such that the screw 4 comes frictionally to a concern provided for this purpose in the central through-hole 3 stopper 5 and the Heat ⁇ shield 1 fixed in this way on the wall of the combustion chamber.
  • the heat shield 1 has, as the sectional view can not be removed, a substantially rectangular shape.
  • the combustion chamber is lined with a plurality of heat shields of the type shown.
  • FIGS. 5 to 7 In the central through-hole 3 of the heat shield 1 a cap 6 according to the invention is inserted. Covering cap 6 is shown enlarged in further views in FIGS. 5 to 7. As can be seen in particular the side view in Figure 6, the cap on a sleeve-shaped cap body 7, whose outer contour is adapted to the inner contour of the through-hole 3 in the upper region. The cap body is formed around the
  • the cap body 7 has a plate-shaped, round upper wall 8 and an annular web 9 projecting downwardly therefrom.
  • the diameter of the annular ridge 9 is smaller than the diameter of the upper wall 8.
  • a region tapering from the outer edge of the upper wall 8 to the outside of the annular ridge 9 is provided, which serves as a stop 9a of the cap body 7 at the upper End of the penetration hole 3 is used.
  • the penetration hole 3 has in this area a rounded edge 3b with an approximately quarter-circular cross-section on to which the cross-section also administrattelnikför ⁇ -shaped stopper 9a is adjusted.
  • the top of the plate-shaped top wall 8 of the Cape pen stresses 7 is further provided with a heat insulation layer 10 verse ⁇ hen.
  • This is made of a ceramic material and it is ge ⁇ suitable to keep temperatures of more than 1200 ° C to withstand.
  • top wall 8 of the cap body 7 are back about how well seen in Figure 8, which holds a view of the top ent ⁇ , a total of four openings 11 are provided.
  • a receptacle 13 for the head 4a of the screw 4 is also provided on the cap body 6, a receptacle 13 for the head 4a of the screw 4 is also provided.
  • the receptacle 13 into which the screw head 4a fits with lateral play over about three four ⁇ tel its height is specifically defined by the underside of the upper wall 8 of the cap body and the In ⁇ inner side of the annular ridge 9.
  • the overcap 6 also comprises fastening means, specifically a circlip 12, by means of which the cap body 7 is fixed by clamping to the head 4a of the screw 4.
  • the Siche ⁇ approximately ring 12 which is designed to be open, consists of a bent wire of spring steel. As can be clearly seen in FIG.
  • the open circlip 12 concretely comprises an approximately semi-circular portion 12a and a V-shaped inwardly bent portion 12b at each of its two ends.
  • the portion 12a engages around the cap body 7 on the outside in the region of the annular web 9.
  • the V-shaped inwardly bent portions 12b at the two ends of the securing ⁇ ring further protrude through two opposing openings 14 in the wall of the annular web 9 in its interior.
  • the V-shaped inwardly projecting end portions 12b of the securing ring 12 are frictionally against the screw ⁇ head 4a.
  • the cap body 7 is further formed and fixed to the screw head 4a that between see the cap body 7 and the screw head 4a an annular channel 15 for guiding cooling air is defined when the cap 6 on the screw 4th is clamped by means of the Siche ⁇ approximately ring 12th Specifically, the cap body 7 is held by means of the retaining ring 12 on the screw head 4a, that the screw head 4a in the receptacle 13, which surrounds the screw head 4a with lateral play, since ⁇ Lich is centered. Between the inner wall of the receptacle 13 and the outer wall of the screw head 4a so a ring ⁇ shaped channel 15 is defined for guiding cooling air when the cap body 7 is clamped as shown in Figure 1 on the screw head 4a.
  • the means for guiding cooling air further comprise four channels 15a, which extend from the upper region of the annular channel 15 radially to the outside of the cap body 7 and four grooves which are provided on the outside of the cap body 7 in the region of the stop 9a.
  • the grooves which are not visible in the figure, extending in the region of the quarter-circle of the stopper 9a each of one of the radial channels 15a to the top of the cap body 7.
  • the outwardly open grooves are closed by the inner wall of the through-hole 3, when the Cap body 7, as shown in the figure 1, positively in the
  • Through hole 3 is seated, so that channels for guiding cooling air are formed.
  • the grooves each open into one of four openings 11, which, as is clearly visible in Figure 8, are provided in the outer edge region of the upper wall 8.
  • the openings 11 allow a particularly uniform leakage of cooling air into the combustion chamber.
  • the openings 11 also allow a particularly comfortable lifting of the cap 6 of the penetration hole 3, since a suitable tool, such as a screw ⁇ puller can be inserted into this, to raise the cap comfortably.
  • the heat shield 1 is acted upon by cooling air via its openings, not shown in the drawing, which extend from its lower to its upper side through its wall.
  • the cooling air flow is represented by corresponding arrows in the figures Darge ⁇ .
  • the cooling air flows through the annular channel 15, which is defined between the screw head 4a and the inner wall of the cap body 7 in the region of the receptacle 13, on the head 4a of the screw 4 on the outside over.
  • the cooling air is guided in the four grooves, which are provided on the outside in the region of the stopper 9a.
  • the cooling air flows to the openings 11 in the upper wall 8 of the cap body 7 enters into the combustion chamber.
  • FIG. 2 shows a further heat shield 1 according to the invention, which is almost identical to that shown in FIG.
  • the same components are provided with the same reference numerals.
  • the only difference of this heat shield 1 to that shown in Figure 1 is that not in the bottom wall 3a of the through-hole 3 channels for the admission of cooling air into the interior of the
  • FIG. 3 shows a further heat shield 1 according to the invention, which is almost identical to the heat shields 1 shown in FIGS. Identical components are again provided with the same reference numerals. The only difference here is that in the heat shield 1 no channels for guiding cooling air in the wall of the through-hole 3 are provided.
  • the supply of cooling air into the interior of the through-hole 3 takes place here by means provided in the screw 4 feed channel.
  • the feed channel 18 extends centrally in the longitudinal direction through the screw 4.
  • FIG. 4 shows the heat shield 1 shown in FIG.
  • the screw 4 is different from the Darge in Figure 3 ⁇ set characterized in that it comprises in the upper end of its head 4a has a conical recess 20, through which cooling air flowing through the central supply channel 18 in the
  • Screw 4 is inserted, can be performed evenly in the upper side ⁇ union end portion of the screw head 4a. From here, the cooling air, since the screw 4 is not fluid-tight against the underside of the upper wall 8 of the cap body 7, enters the annular channel 15 a. Magnified views obliquely from above and a sectional view of the screw 4 are included in the figures 14 to 16.
  • FIG. 10 to 13 An alternative embodiment of a cap according to the invention can also be seen in Figures 10 to 13. This has a projecting from the underside of the upper wall 8 of the cap body 7 downwardly conical projection
  • FIG. 13 shows an enlarged view of the covering cap from FIGS. 10 and 11 obliquely from below.
  • the cap 6 is seen obliquely from above.
  • the conical projection 21 engages - when the cover cap is positioned in the through-hole 3 of the heat shield 19 - in the likewise conical recess 20 of the screw 4, which are identical in construction to that shown in Figure 4
  • a conical annular channel 22 is defined between the conical recess 20 and the conical projection 21, a conical annular channel 22 is defined.
  • the central supply duct 18 opens into the lower tip end portion of the conical annular channel 22, so that cooling air flowing through the supply passage 18 upward in the screw 4, can flow into the conical Ringka ⁇ nal.
  • central supply channel 18 is here also a
  • Swirl plate 24 is provided. By means of the swirl plate 24 is achieved that the cooling air is guided with a twist along the wall of the conical annular channel.
  • cooling air can also-as shown in FIG. 11 -continuously extend via channels 25, which extend horizontally through the screw wall in the lower end region of the screw 4 and open tangentially into the central feed channel 18 be routed to the feed channel.
  • FIG. 10 Another difference of this embodiment of the cap according to the invention is that it has no four openings in the outer edge region in its upper wall 8, but two openings 26 which are provided somewhat centrally in the upper wall 8.
  • the openings 26 are clearly visible in FIG.
  • the openings 26 serve - as the openings 11 - the discharge of cooling air into the combustion chamber and a comfortable lifting the cap 6 of the penetration hole 3 by means of a suitable tool.
  • the vertical channels 23 open out into the openings 26.
  • the channels 23 connect the obe ⁇ ren end portion of the conical annular channel with the openings 26, cooling air may consist of the upper end portion of the conical annular channel 22 in the enter both vertical channels 23 and flow through the openings 26 into the combustion chamber.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ceramic Engineering (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Abstract

L'invention concerne un capot de couverture (6) pour un alésage de passage (3) dans un bouclier thermique (1) et un élément de fixation (4) pouvant être positionné dans l'alésage de passage (3), servant à fixer le bouclier thermique (1) sur une paroi. Ledit capot de couverture comprend : un corps de capot (7) réalisé afin de fermer au moins en partie l'alésage de passage (3) et comportant, au niveau de son côté supérieur, une couche thermo-isolante (10) ; des moyens de fixation réalisés afin de fixer le corps de capot (7) de manière amovible, en particulier par serrage, sur l'alésage de passage (3) et/ou sur l'élément de fixation (4). L'invention concerne en outre un bouclier thermique (1) comprenant : une couche thermo-isolante (2) au niveau de son côté supérieur ; un alésage de passage (3) en particulier central, dans lequel un élément de fixation (4) servant à fixer le bouclier thermique (1) est positionné sur une paroi dans l'état monté ; et un capot de couverture (6) du type mentionné, qui est fixé sur l'alésage de passage (3) et/ou sur l'élément de fixation (4) de manière amovible, en particulier par serrage.
PCT/EP2015/067331 2014-07-31 2015-07-29 Capot de couverture pour un alésage de passage dans un bouclier thermique et un élément de fixation pouvant être positionné dans l'alésage de passage ainsi que bouclier thermique comprenant un capot de couverture Ceased WO2016016281A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014215034.5A DE102014215034A1 (de) 2014-07-31 2014-07-31 Abdeckkappe für eine Durchgriffsbohrung in einem Hitzeschild und ein in der Durchgriffsbohrung positionierbares Fixierelement sowie Hitzeschild mit einer Abdeckkappe
DE102014215034.5 2014-07-31

Publications (1)

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WO2016016281A1 true WO2016016281A1 (fr) 2016-02-04

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PCT/EP2015/067331 Ceased WO2016016281A1 (fr) 2014-07-31 2015-07-29 Capot de couverture pour un alésage de passage dans un bouclier thermique et un élément de fixation pouvant être positionné dans l'alésage de passage ainsi que bouclier thermique comprenant un capot de couverture

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DE (1) DE102014215034A1 (fr)
WO (1) WO2016016281A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3354986A1 (fr) * 2017-01-30 2018-08-01 Siemens Aktiengesellschaft Vis de fixation pour un élément écran thermique
US12422141B2 (en) * 2021-12-27 2025-09-23 Kawasaki Jukogyo Kabushiki Kaisha Combustor of gas turbine including a fixture that attaches a liner to an outer wall having a cooling air passage

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3084731B1 (fr) * 2019-02-19 2020-07-03 Safran Aircraft Engines Chambre de combustion pour une turbomachine
FR3128007B1 (fr) * 2021-10-12 2025-09-05 Safran Aircraft Engines Chambre de combustion de turbomachine
DE102023210272A1 (de) 2023-10-19 2025-04-24 Siemens Energy Global GmbH & Co. KG Brennkammer einer Gasturbine mit optimierter Kühlung

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4820097A (en) * 1988-03-18 1989-04-11 United Technologies Corporation Fastener with airflow opening
US5391028A (en) * 1993-05-12 1995-02-21 Northrop Grumman Corporation Method for reducing radar cross-section of aircraft fasteners, and fastener assemblies for use therein
DE19623300A1 (de) * 1996-06-11 1997-12-18 Siemens Ag Hitzeschildanordnung, insbesondere für Strukturteile von Gasturbinenanlagen, mit geschichtetem Aufbau
WO2003045684A1 (fr) * 2001-11-27 2003-06-05 Composite Optics, Inc. Procede et systeme de protection thermique
GB2434199A (en) * 2006-01-14 2007-07-18 Alstom Technology Ltd Combustor liners
EP1852616A2 (fr) * 2006-05-02 2007-11-07 United Technologies Corporation Pièce de fixation
DE202009008465U1 (de) * 2009-06-19 2010-05-27 Abc Umformtechnik Gmbh & Co. Kg Befestigungselement mit einem Sicherungskopf gegen unerwünschtes Lösen
US20140147251A1 (en) * 2012-11-23 2014-05-29 Alstom Technology Ltd Insert element for closing an opening inside a wall of a hot gas path component of a gas turbine and method for enhancing operational behaviour of a gas turbine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4820097A (en) * 1988-03-18 1989-04-11 United Technologies Corporation Fastener with airflow opening
US5391028A (en) * 1993-05-12 1995-02-21 Northrop Grumman Corporation Method for reducing radar cross-section of aircraft fasteners, and fastener assemblies for use therein
DE19623300A1 (de) * 1996-06-11 1997-12-18 Siemens Ag Hitzeschildanordnung, insbesondere für Strukturteile von Gasturbinenanlagen, mit geschichtetem Aufbau
WO2003045684A1 (fr) * 2001-11-27 2003-06-05 Composite Optics, Inc. Procede et systeme de protection thermique
GB2434199A (en) * 2006-01-14 2007-07-18 Alstom Technology Ltd Combustor liners
EP1852616A2 (fr) * 2006-05-02 2007-11-07 United Technologies Corporation Pièce de fixation
DE202009008465U1 (de) * 2009-06-19 2010-05-27 Abc Umformtechnik Gmbh & Co. Kg Befestigungselement mit einem Sicherungskopf gegen unerwünschtes Lösen
US20140147251A1 (en) * 2012-11-23 2014-05-29 Alstom Technology Ltd Insert element for closing an opening inside a wall of a hot gas path component of a gas turbine and method for enhancing operational behaviour of a gas turbine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3354986A1 (fr) * 2017-01-30 2018-08-01 Siemens Aktiengesellschaft Vis de fixation pour un élément écran thermique
WO2018137895A1 (fr) 2017-01-30 2018-08-02 Siemens Aktiengesellschaft Vis de fixation pour élément d'écran thermique
US12422141B2 (en) * 2021-12-27 2025-09-23 Kawasaki Jukogyo Kabushiki Kaisha Combustor of gas turbine including a fixture that attaches a liner to an outer wall having a cooling air passage

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