EP3524781A1 - Connecting device for an adjustable vane of a gas turbine - Google Patents
Connecting device for an adjustable vane of a gas turbine Download PDFInfo
- Publication number
- EP3524781A1 EP3524781A1 EP19156113.3A EP19156113A EP3524781A1 EP 3524781 A1 EP3524781 A1 EP 3524781A1 EP 19156113 A EP19156113 A EP 19156113A EP 3524781 A1 EP3524781 A1 EP 3524781A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- connecting device
- lever
- pin
- receptacle
- clamping
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000008878 coupling Effects 0.000 claims description 35
- 238000010168 coupling process Methods 0.000 claims description 35
- 238000005859 coupling reaction Methods 0.000 claims description 35
- 230000005540 biological transmission Effects 0.000 claims description 4
- 239000007789 gas Substances 0.000 description 26
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000003746 feather Anatomy 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Images
Classifications
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- 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
- F01D25/28—Supporting or mounting arrangements, e.g. for turbine casing
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- 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
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
- F01D17/12—Final actuators arranged in stator parts
- F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
- F01D17/16—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of nozzle vanes
- F01D17/162—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of nozzle vanes for axial flow, i.e. the vanes turning around axes which are essentially perpendicular to the rotor centre line
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- 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
- F01D25/243—Flange connections; Bolting arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/56—Fluid-guiding means, e.g. diffusers adjustable
- F04D29/563—Fluid-guiding means, e.g. diffusers adjustable specially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/30—Retaining components in desired mutual position
- F05D2260/36—Retaining components in desired mutual position by a form fit connection, e.g. by interlocking
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/30—Retaining components in desired mutual position
- F05D2260/37—Retaining components in desired mutual position by a press fit connection
Definitions
- the present invention relates to a connecting device for an adjustable blade of a gas turbine, in particular an aircraft gas turbine, comprising a pin member connected to a respective blade and a lever member connected to the pin member, wherein the lever member and the pin member are movable together about a pin rotation axis.
- a threaded portion is formed on the pin member, in particular at its axial end which is remote from the blade, or otherwise made a change in shape, such as bevels and the like to connect the pin portion with the lever member can. Examples of this are from the EP 2 177 771 A2 or the WO 2015/031058 A1 known.
- the object underlying the invention is seen to provide a connecting device in which the above disadvantages can be avoided.
- the connecting device has a clamping element which is arranged between the lever element and the pin element is, so that a frictional connection between the pin member, the clamping element and the lever member can be produced or manufactured.
- This allows a particularly space-saving design of the connected to the connecting device blade assembly, as further fastening means can be used, but at the same time the blade and the blade pin can be made smaller.
- the tensioning element a safe power transmission between the lever element and the pin element, so that the existing Verstelltimien can be transferred to smaller compressors or turbines with Verstellleitschaufeln.
- the clamping element has a plurality of recesses along its circumference, such that a respective elastically movable clamping section is formed between adjacent recesses.
- the clamping element may be stretched in the assembled state due to the frictional connection and / or have a bias.
- At least two diametrically opposed recesses in the clamping element can be dimensioned such that they form a clamping receptacle in which the positioning element is received. Accordingly, the positioning element is arranged in an assembled state of the connecting device so that it is arranged in the clamping receptacle, the pin receptacle and the lever receptacle.
- the clamping receptacle, the pin receptacle and the lever receptacle can be aligned in a simple manner to each other by the positioning without a readjustment during assembly is necessary.
- the clamping portions may be formed such that they have a conical outer contact surface.
- the radially inner contact surface of the coupling portion of the lever member and the radially outer contact surfaces of the clamping portions abut each other and be mutually braced.
- connection device in the connection device, the lever element and the pin member are aligned by means of a positioning element to each other, wherein the positioning element is received in a pin receiving and a lever receptacle.
- the pin receptacle thus serves as a receptacle of the positioning element in the pin element, while the lever receptacle serves as a receptacle of the positioning element in the lever element.
- the positioning element may be formed, for example, as a plate-like key.
- the positioning element is used in particular to allow alignment of the lever element and the pin element in the circumferential direction with respect to the pin rotation axis. In this case, this alignment takes place by means of the positioning element before the connection device is tightened.
- By using a separate positioning element weakening or changing the cross section of the pin element can be avoided in particular in areas in which forces, in particular rotational forces are transmitted from the lever element to the pin member in the assembled state of the connecting device.
- the pin receptacle and the lever receptacle are arranged in alignment with one another. This allows a particularly simple and cost-effective production of the positioning and the corresponding recordings and thus facilitates the assembly.
- the positioning element is formed symmetrically to a plane passing through the pin rotation axis. This also facilitates the production and makes it possible to disregard an installation direction of the positioning during assembly.
- the pin receptacle may preferably be formed in an axial end portion of the pin member.
- the positioning element can advantageously be connected first to the pin element during assembly, which facilitates subsequent placement of the lever element, in particular its coupling section, on or on the pin element.
- the pin receptacle is designed as a slot.
- the slot may have an axial depth which is slightly larger than the axial extent or height of the positioning element, which passes through the pin receptacle.
- the clamping element may have a threaded portion to which a nut is fastened or fastened.
- the threaded portion is located at an axial portion of the clamping element, which faces away from the pin member.
- the lever element may have a sleeve-like coupling portion, wherein the coupling portion and the pin member are arranged concentrically with each other.
- the coupling portion may be formed in particular circular. Externally, the coupling portion has a substantially cylindrical shape.
- the lever receptacle can be formed in an axial edge section of the coupling section.
- the lever receptacle may be formed by two diametrically opposite lever receiving portions.
- the lever receiving portions may be provided as radially extending slots in the edge portion.
- the positioning member is in an assembled state of the connecting means in the lever receiving portions.
- the lever holder can simply slide over the positioning, so that always an exact alignment of the lever or an additional clamping element described in more detail below is made possible.
- the coupling portion may have a radially inner contact surface, which is conical.
- the radially inner contact surface faces the pin element.
- the contact surface surrounds the pin member, wherein between the contact surface and the pin member a distance is present.
- the connecting device may comprise a securing sleeve, which is arranged in the axial direction on the coupling portion.
- the securing sleeve may have a peripheral edge which extends in the axial direction slightly above the coupling portion of the lever member. This can ensure that the positioning element in the assembled state of the connecting device can not be removed from this.
- the locking sleeve may be disposed between the nut and the coupling portion such that a force exerted by the nut is transmitted in the axial direction to the locking sleeve and the coupling portion. Due to the interaction of its radially inner contact surface with the contact surfaces of the clamping sections, an axial force acting on the coupling section of the lever element substantially presses the clamping sections radially into the pin element, so that the pin element is frictionally held by the clamping sections.
- the positioning element can be received without force transmission in the assembled state of the connecting device.
- a frictional connection between the lever element and the pin element can be produced, wherein the positioning element during assembly for correct alignment of the lever element and the pin member to each other.
- the positioning element In one of the lever element to be transmitted to the pin element rotational movement about the pin rotation axis, the positioning element is rotated, but it does not transmit any forces from the lever element on the pin member.
- the blades mentioned here can be, in particular, adjustable blades of a compressor of the gas turbine.
- the invention also relates to a gas turbine, in particular an aircraft gas turbine, with a plurality of adjacently arranged in the turbine circumferential direction adjustable blades, in particular vanes, wherein on each blade a connecting device is arranged according to one of the preceding claims, and wherein the lever elements of the connecting means with a along the circumferential direction of the gas turbine are coupled movable adjusting ring.
- the adjacently arranged in the turbine circumferential direction adjustable blades can be assigned to a compressor stage.
- Such an adjustable blade ring can also be provided several times on a gas turbine, so that a ring with adjustable blades can be provided for any type of compressor, such as low pressure, medium pressure or high pressure compressor on any compressor stages.
- Fig. 1 shows schematically and simplified an aircraft gas turbine 10, which is illustrated purely by way of example as a turbofan engine.
- the gas turbine 10 comprises a fan 12, which is surrounded by an indicated jacket 14.
- the compressor 12 is adjoined by a compressor 16, which is accommodated in an indicated inner housing 18 and may be of single-stage or multi-stage design.
- the combustion chamber 20 connects. Hot exhaust gas flowing out of the combustion chamber then flows through the adjoining turbine 22, which may be designed in one or more stages.
- the turbine 22 includes a high-pressure turbine 24 and a low-pressure turbine 26.
- a hollow shaft 28 connects the high-pressure turbine 24 with the compressor 16, in particular a high-pressure compressor 29 so that they are driven together or rotated.
- a further internal shaft 30 in the radial direction TRR of the turbine connects the low-pressure turbine 26 with the fan 12 and with a low-pressure compressor 32, so that they are driven together or rotated.
- the turbine 22 is followed by a thrust nozzle 33, which is only indicated here.
- a turbine intermediate housing 34 is arranged between the high-pressure turbine 24 and the low-pressure turbine 26, which is arranged around the shafts 28, 30. In its radially outer region 36, the turbine intermediate housing 34 is flowed through by hot exhaust gases from the high-pressure turbine 24. The hot exhaust gas then passes into an annular space 38 of the low-pressure turbine 26.
- example blade rings 27 are shown.
- Guide vane rings 31 are shown by way of example only for the compressor 32 for reasons of clarity.
- adjustable guide vanes which may for example be part of an overall adjustable vane ring 31.
- adjustable guide vane rings 31 may also be provided in other compressors or possibly also in turbines, even if this in the Fig. 1 only exemplified for the compressor 32 is shown.
- Fig. 2 shows a schematic perspective view of a connecting device 50 for an adjustable guide vane of a gas turbine.
- the guide vane 51 which is indicated here only partially and in broken lines, adjoins in the axial direction AR of the connecting device 50 a pin element 52, which in the Fig. 2 only partially shown.
- the pin member 52 and the associated blade 51, in particular guide vane are integrally connected to one another.
- the connecting device 50 comprises a lever element 54.
- the lever element 54 is in Fig. 2 (and in Fig. 1 ) is shown only partially, with the lever member 54 being illustrated cut off at 56.
- the lever element 54 is configured to rotate the pin element 52 about the pin rotation axis ZD parallel to the axial direction AR in an assembled state of the connection device 50.
- the pin member 52 has a pin receptacle 60 at its end remote from the blade 51 axial end 58.
- the pin receptacle is designed in particular as a slot.
- the lever element 54 has a sleeve-like coupling portion 62.
- the coupling portion 62 and the pin member 52 are in particular arranged concentrically with each other.
- a lever receptacle 66 is formed in an axial edge portion 64 of the coupling portion 62.
- the lever receptacle 66 is formed in particular by two diametrically opposite lever receiving portions 66a, 66b.
- a positioning element 68 is received in the lever receptacle 66 and the pin receptacle 60.
- the positioning member 68 serves to align the pin member 52 and the lever member 54 with respect to the circumferential direction UR of the connecting device 50 to each other.
- the positioning element 68 is designed in particular as a plate-like or flat-rod-like component.
- the positioning element 68 may also be referred to as a feather key.
- the connecting device 50 further comprises a clamping element 70, which in Fig. 3 alone and in Fig. 1 is shown together with other components of the connecting device 50.
- the clamping element 70 has at its the blade 51 facing the axial end 72 a plurality of clamping portions 74a, 74b, 74c.
- the clamping element 70 has four clamping sections, of which, however, in the Fig. 1 and 3 only the three clamping sections 74a, 74b, 74c are visible. It should be noted that the clamping element 70 could also have a different number of clamping sections, for example six or eight.
- a respective recess 76a and 76b is provided between two adjacent clamping portions 74a, 74b and 74a, 74c.
- the tensioning sections 74a, 74b, 74c are elastically movable or deflectable, in particular in the radial direction, in particular toward or away from the pin element 52.
- the recess 76b and a diametrically opposite another recess, which in the selected representation of Fig. 3 is not visible, are dimensioned such that they form a clamping receptacle 78, in which the positioning element 68 can be received during assembly of the connecting device 50 and is received in the assembled state of the connecting device 50.
- the clamping portions 74a, 74b, 74c have a respective outer contact surface 80.
- the contact surfaces 80 are conical along the axial direction AR.
- the clamping element 70 has a varying diameter in the region of its clamping sections 74a, 74b, 74c.
- the outer contact surfaces 80 are in an assembled state of the connecting device 50 in contact with a radially inner contact surface 82 of the lever member 54.
- the radially inner contact surface 82 is arranged in particular in the region of the coupling portion 62.
- the radially inner contact surface 82 may be conical. Accordingly, the sleeve-like coupling portion 62 in the region of the inner contact surface 82 has a varying inner diameter.
- the radially outer contact surface 80 of the clamping portions 74a, 74b, 74c and the radially inner contact surface 82 of the coupling portion 62 are formed complementary to each other.
- the clamping element 70 has an axially adjoining the clamping portions 74a, 74b, 74c threaded portion 84.
- the threaded portion 84 has a in the FIGS. 1 and 3 not shown external thread on. With the threaded portion 84, a nut 86 is connectable or connected, as in Fig. 1 is shown.
- a securing sleeve 88 is arranged in the axial direction between the nut 86 and the lever element 54, in particular the clamping portion 62. A force exerted by the nut 86 in the axial direction AR is transmitted to the locking sleeve 88 and the coupling portion 62.
- the in Fig. 2 shown assembled state of the connecting device 50 is in Fig. 5 in a sectional view approximately corresponding to the section line VV of Fig. 1 shown.
- the connection device 50 in an outer region of structural components 90 of a gas turbine 10 (FIG. Fig. 1 ), in particular aircraft gas turbine, attached.
- the structural members 90 may be part of an inner housing 18 as shown in FIG Fig. 1 is illustrated.
- the Fig. 5 are the same reference numerals used as in the FIGS. 2 to 4 to designate the same elements, although not necessarily with reference to the Fig. 5 be described again. In that regard, the previous description of the Fig. 2 to 4 also in conjunction with the Fig. 5 can be read and understood.
- Fig. 5 the lever element 54 is shown completely (not cut off).
- the lever element 54 has a further coupling section 92 at its end remote from the connecting device 50.
- the coupling portion 92 is connected to an adjusting device 94.
- the adjusting device 94 comprises an adjusting ring 96 and a plurality of adjusting pins 98.
- the adjusting pins 98 and the adjusting ring 96 are movable back and forth along a turbine circumference. This translational adjustment movement along the circumferential direction the turbine causes a pivoting of the lever element 54 about the axis of rotation ZD of the pin member 52.
- a connected to the pin member 52 blade 51 (FIG. Fig. 2 ) are rotated to a desired position.
- the clamping element 70 of the connecting device 50 rests on a guide sleeve 100.
- the guide sleeve forms in this example, a radial bearing for the pin member 52.
- the axial direction AR of the connecting device corresponds with respect to the gas turbine a radial direction TRR of the gas turbine.
- Fig. 6 shows an enlarged area approximately corresponding to the dashed area VI of Fig. 5 , The Fig. 6 serves in particular to describe the size ratios of the positioning element 68 to other elements.
- the positioning element 68 has a length VL extending in the radial direction RR.
- the length VL of the positioning member 68 is set to be slightly smaller than the diameter DK of the substantially circular coupling portion 62 and the outer diameter of the axial edge portion 64, which is annular.
- the positioning element 68 has a width VB which is smaller than the axial extent or depth ZT of the pin receptacle 60. Furthermore, the width VB of the positioning element 68 is also selected so that it is smaller than the axial extent or depth HT of the lever receptacle 66 or the individual lever receiving portions 66a, 66b.
- the securing sleeve 88 has an edge portion 102 which has an axial length which is greater than the width of the positioning element 68.
- the edge portion 102 bears with its axially lower end against an outer circumference of the coupling portion 62. This ensures that the positioning member 68 is not removable in the radial direction of the connecting device 50.
- the positioning element 68 is received in the assembled state of the connecting device 50 substantially force-transfer free.
- the positioning element 68 does not transmit rotational movements introduced by the lever element 54 onto the pin element 52.
- the forces acting in the axial direction AR from the utter 86 are transmitted via the securing sleeve 88, the lever member 54 and its coupling portion 62 on the clamping element 70 and its clamping portions 74a to 74d, so that the clamping portions 74a to 74d are pressed against the pin member 52.
- the positioning member 68 is dimensioned so that when assembling the connecting device 50, a correct positioning of pin member 52, lever member 54 and clamping element 70 allows each other, in particular in the circumferential direction UR of the connecting device 50, but that it is not included in the power transmission when assembled State of the connecting device 50 is a frictional connection between the lever member 54 and the pin portion 52 is made.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Control Of Turbines (AREA)
Abstract
Beschrieben wird eine Verbindungseinrichtung (50) für eine verstellbare Schaufel (51) einer Gasturbine (10), insbesondere einer Fluggasturbine, umfassend:
ein mit einer betreffenden Schaufel (51) verbundenes Zapfenelement (52);
ein mit dem Zapfenelement (52) verbundenes Hebelelement (54), wobei das Hebelelement (54) und das Zapfenelement (52) gemeinsam um eine Zapfendrehachse (ZD) beweglich sind. Dabei ist vorgesehen, dass das Hebelelement (54) und das Zapfenelement (52) mittels eines Positionierungselements (68) zueinander ausgerichtet sind, wobei das Positionierungselement (68) in einer Zapfenaufnahme (60) und einer Hebelaufnahme (66, 66a, 66b) aufgenommen ist. Eine zugehörige Gasturbine wird ebenfalls präsentiert.
Described is a connecting device (50) for an adjustable blade (51) of a gas turbine (10), in particular an aircraft gas turbine, comprising:
a pin member (52) connected to a respective blade (51);
a lever member (54) connected to the pin member (52), the lever member (54) and the pin member (52) being movable in common about a pin rotation axis (ZD). It is provided that the lever element (54) and the pin element (52) by means of a positioning element (68) are aligned with each other, wherein the positioning element (68) in a pin receptacle (60) and a lever receptacle (66, 66a, 66b) is received , An associated gas turbine is also presented.
Description
Die vorliegende Erfindung betrifft Verbindungseinrichtung für eine verstellbare Schaufel einer Gasturbine, insbesondere einer Fluggasturbine, umfassend ein mit einer betreffenden Schaufel verbundenes Zapfenelement und ein mit dem Zapfenelement verbundenes Hebelelement, wobei das Hebelelement und das Zapfenelement gemeinsam um eine Zapfendrehachse beweglich sind.The present invention relates to a connecting device for an adjustable blade of a gas turbine, in particular an aircraft gas turbine, comprising a pin member connected to a respective blade and a lever member connected to the pin member, wherein the lever member and the pin member are movable together about a pin rotation axis.
Richtungsangaben wie "Axial-" bzw. "axial", "Radial-" bzw. "radial" und "Umfangs-" sind im Rahmen dieser Beschreibung auf die Zapfendrehachse der Verbindungseinrichtung bezogen zu verstehen, sofern sich aus dem Kontext nicht explizit oder implizit etwas anderes ergibt.Directional details such as "axial" or "axial", "radial" or "radial" and "circumferential" are to be understood in the context of this description with respect to the pin rotation axis of the connection device, unless the context explicitly or implicitly something other results.
Bei bekannten Verbindungseinrichtungen für verstellbare Schaufeln von Gasturbinen ist am Zapfenelement, insbesondere an dessen axialen Ende, das von der Schaufel abgewandt ist, ein Gewindeabschnitt ausgebildet oder in sonstiger Weise eine Formänderung vorgenommen, wie etwa Abschrägungen und dergleichen, um den Zapfenabschnitt mit dem Hebelelement verbinden zu können. Beispiele hierfür sind aus der
Aktuelle Entwicklungen auf dem Gebiet der Gasturbinen, insbesondere Fluggasturbinen, gehen dahin, dass Geometrien, wie etwa der Strömungsquerschnitte, bzw. Strukturen verkleinert werden. Dies hat zur Folge, dass auch verstellbare Schaufeln mit ihren daran angebrachten Zapfenelementen verkleinerte Dimensionen aufweisen. Konventionelle Verbindungssysteme für verstellbare Schaufeln, beispielsweise über sogenannte Dachschrägen, Konusgeometrien o.ä. erfordern in einem axialen Endabschnitt des Zapfenelements ein Reduzierung von dessen Durchmesser. Dies erlaubt im Gegenzug den Einsatz von Schrauben oder Muttern mit einem üblichen Minimaldurchmesser von 0,19 bzw. der Größe M5 nicht mehr.Recent developments in the field of gas turbines, in particular aircraft gas turbines, go to the fact that geometries such as the flow cross-sections, or structures are reduced. This has the consequence that also adjustable blades with their attached pin elements have reduced dimensions. Conventional connection systems for adjustable blades, for example via so-called roof pitches, cone geometries or similar. require a reduction of its diameter in an axial end portion of the pin member. In return, this no longer permits the use of screws or nuts with a usual minimum diameter of 0.19 or M5 size.
Die der Erfindung zu Grunde liegende Aufgabe wird darin gesehen, eine Verbindungseinrichtung bereitzustellen, bei der die obigen Nachteile vermieden werden können.The object underlying the invention is seen to provide a connecting device in which the above disadvantages can be avoided.
Zur Lösung dieser Erfindung wird vorgeschlagen, dass die Verbindungseinrichtung ein Spannelement aufweist, das zwischen dem Hebelelement und dem Zapfenelement angeordnet ist, derart dass eine kraftschlüssige Verbindung zwischen dem Zapfenelement, dem Spannelement und dem Hebelelement herstellbar oder hergestellt ist. Dies erlaubt eine besonders platzsparende Ausführung der an die Verbindungseinrichtung angebundene Schaufelanordnung, da weiterhin Befestigungsmittel verwendet werden können, aber gleichzeitig die Schaufel und deren Schaufelzapfen kleiner dimensioniert werden können. Ferner erfolgt so durch das Spannelement eine sichere Kraftübertragung zwischen dem Hebelelement und dem Zapfenelement, so dass die vorhandenen Verstellprinzipien auf kleinere Verdichter oder Turbinen mit Verstellleitschaufeln übertragen werden können.To solve this invention, it is proposed that the connecting device has a clamping element which is arranged between the lever element and the pin element is, so that a frictional connection between the pin member, the clamping element and the lever member can be produced or manufactured. This allows a particularly space-saving design of the connected to the connecting device blade assembly, as further fastening means can be used, but at the same time the blade and the blade pin can be made smaller. Furthermore, as a result of the tensioning element, a safe power transmission between the lever element and the pin element, so that the existing Verstellprinzipien can be transferred to smaller compressors or turbines with Verstellleitschaufeln.
Vorzugsweise weist das Spannelement dabei entlang seines Umfangs mehrere Ausnehmungen auf, derart dass zwischen benachbarten Ausnehmungen ein jeweiliger elastisch beweglicher Spannabschnitt gebildet ist. Insbesondere kann das Spannelement im Zusammenbauzustand aufgrund der kraftschlüssigen Verbindung gedehnt sein und/oder eine Vorspannung aufweisen.Preferably, the clamping element has a plurality of recesses along its circumference, such that a respective elastically movable clamping section is formed between adjacent recesses. In particular, the clamping element may be stretched in the assembled state due to the frictional connection and / or have a bias.
Wenigstens zwei sich diametral gegenüberliegende Ausnehmungen in dem Spannelement können derart dimensioniert sein, dass sie eine Spannaufnahme bilden, in der das Positionierungselement aufgenommen ist. Entsprechend ist das Positionierungselement in einem zusammengebauten Zustand der Verbindungseinrichtung so angeordnet, dass es in der Spannaufnahme, der Zapfenaufnahme und der Hebelaufnahme angeordnet ist. Somit können vorteilhaft die Spannaufnahme, die Zapfenaufnahme und die Hebelaufnahme auf einfache Weise durch das Positionierelement zueinander ausgerichtet werden, ohne dass ein Nachjustieren während der Montage nötig wird.At least two diametrically opposed recesses in the clamping element can be dimensioned such that they form a clamping receptacle in which the positioning element is received. Accordingly, the positioning element is arranged in an assembled state of the connecting device so that it is arranged in the clamping receptacle, the pin receptacle and the lever receptacle. Thus, advantageously, the clamping receptacle, the pin receptacle and the lever receptacle can be aligned in a simple manner to each other by the positioning without a readjustment during assembly is necessary.
Die Spannabschnitte können derart ausgebildet sein, dass sie eine konische äußere Kontaktfläche aufweisen. Dabei können die radial innen liegende Kontaktfläche des Kopplungsabschnitts des Hebelelements und die radial äußeren Kontaktflächen der Spannabschnitte aneinander anliegen und gegeneinander verspannbar sein.The clamping portions may be formed such that they have a conical outer contact surface. In this case, the radially inner contact surface of the coupling portion of the lever member and the radially outer contact surfaces of the clamping portions abut each other and be mutually braced.
In einer vorteilhaften Weiterbildung der Erfindung ist vorgesehen, dass bei der Verbindungseinrichtung das Hebelelement und das Zapfenelement mittels eines Positionierungselements zueinander ausgerichtet sind, wobei das Positionierungselement in einer Zapfenaufnahme und einer Hebelaufnahme aufgenommen ist. Die Zapfenaufnahme dient somit als eine Aufnahme des Positionierungselements in dem Zapfenelement, während die Hebelaufnahme als eine Aufnahme des Positionierungselements in dem Hebelelement dient.In an advantageous development of the invention it is provided that in the connection device, the lever element and the pin member are aligned by means of a positioning element to each other, wherein the positioning element is received in a pin receiving and a lever receptacle. The pin receptacle thus serves as a receptacle of the positioning element in the pin element, while the lever receptacle serves as a receptacle of the positioning element in the lever element.
Das Positionierungselement kann beispielsweise als plättchenartige Passfeder ausgebildet sein. Das Positionierungselement dient insbesondere dazu, eine Ausrichtung von Hebelelement und Zapfenelement in Umfangrichtung bezogen auf die Zapfendrehachse zu ermöglichen. Dabei erfolgt diese Ausrichtung mittels des Positionierungselements bevor die Verbindungseinrichtung festgezogen wird. Durch die Verwendung eines gesonderten Positionierungselements kann eine Schwächung bzw. Veränderung des Querschnitts des Zapfenelements insbesondere in Bereichen vermieden werden, in denen im zusammengebauten Zustand der Verbindungseinrichtung Kräfte, insbesondere Drehkräfte vom Hebelelement auf das Zapfenelement übertragen werden.The positioning element may be formed, for example, as a plate-like key. The positioning element is used in particular to allow alignment of the lever element and the pin element in the circumferential direction with respect to the pin rotation axis. In this case, this alignment takes place by means of the positioning element before the connection device is tightened. By using a separate positioning element weakening or changing the cross section of the pin element can be avoided in particular in areas in which forces, in particular rotational forces are transmitted from the lever element to the pin member in the assembled state of the connecting device.
In einer vorteilhaften Weiterbildung ist vorgesehen, dass die Zapfenaufnahme und die Hebelaufnahme fluchtend zueinander angeordnet sind. Dies ermöglicht eine besonders einfache und kostengünstige Herstellung des Positionierelements und der entsprechenden Aufnahmen und erleichtert somit auch die Montage. Insbesondere kann vorgesehen sein, dass das Positionierelement zu einer durch die Zapfendrehachse verlaufenden Ebene symmetrisch ausgebildet ist. Dies erleichtert ebenfalls die Herstellung und erlaubt es, während der Montage eine Einbaurichtung des Positionierelements nicht beachten zu müssen.In an advantageous development, it is provided that the pin receptacle and the lever receptacle are arranged in alignment with one another. This allows a particularly simple and cost-effective production of the positioning and the corresponding recordings and thus facilitates the assembly. In particular, it can be provided that the positioning element is formed symmetrically to a plane passing through the pin rotation axis. This also facilitates the production and makes it possible to disregard an installation direction of the positioning during assembly.
Die Zapfenaufnahme kann vorzugsweise in einem axialen Endabschnitt des Zapfenelements ausgebildet sein. Hierdurch kann das Positionierelement bei der Montage vorteilhaft als erstes mit dem Zapfenelement verbunden werden, was das anschließende Anordnen des Hebelelements, insbesondere dessen Kopplungsabschnitts, an bzw. auf dem Zapfenelement erleichtert. Beispielsweise ist die Zapfenaufnahme als Schlitz ausgebildet. Der Schlitz kann dabei eine axiale Tiefe aufweisen, die etwas größer ist als die axiale Ausdehnung bzw. Höhe des Positionierungselements, das durch die Zapfenaufnahme hindurch geht.The pin receptacle may preferably be formed in an axial end portion of the pin member. As a result, the positioning element can advantageously be connected first to the pin element during assembly, which facilitates subsequent placement of the lever element, in particular its coupling section, on or on the pin element. For example, the pin receptacle is designed as a slot. The slot may have an axial depth which is slightly larger than the axial extent or height of the positioning element, which passes through the pin receptacle.
Um die Verbindungseinrichtung festzuziehen, kann das Spannelement einen Gewindeabschnitt aufweisen, an dem eine Mutter befestigbar oder befestigt ist. Der Gewindeabschnitt befindet sich an einem axialen Abschnitt des Spannelements, der vom Zapfenelement abgewandt ist.To tighten the connecting device, the clamping element may have a threaded portion to which a nut is fastened or fastened. The threaded portion is located at an axial portion of the clamping element, which faces away from the pin member.
Das Hebelelement kann einen hülsenartigen Kopplungsabschnitt aufweisen, wobei der Kopplungsabschnitt und das Zapfenelement konzentrisch zueinander angeordnet sind. Der Kopplungsabschnitt kann insbesondere kreisförmig ausgebildet sein. Äußerlich weist der Kopplungsabschnitt eine im Wesentlichen zylindrische Form auf.The lever element may have a sleeve-like coupling portion, wherein the coupling portion and the pin member are arranged concentrically with each other. The coupling portion may be formed in particular circular. Externally, the coupling portion has a substantially cylindrical shape.
Die Hebelaufnahme kann in einem axialen Randabschnitt des Kopplungsabschnitts ausgebildet sein. Dabei kann die Hebelaufnahme durch zwei sich diametral gegenüber liegende Hebelaufnahmeabschnitte gebildet sein. Die Hebelaufnahmeabschnitte können als radial verlaufende Schlitze in dem Randabschnitt vorgesehen sein. Das Positionierungselement liegt in einem zusammengebauten Zustand der Verbindungseinrichtung in den Hebelaufnahmeabschnitten auf. Insbesondere wenn die Zapfenaufnahme in einem Zapfenendabschnitt angeordnet ist, lässt sich die Hebelaufnahme einfach über das Positionierelement schieben, so dass stets eine exakte Ausrichtung des Hebels bzw. eines weiter unten noch näher beschriebenen zusätzlichen Spannelements ermöglicht wird.The lever receptacle can be formed in an axial edge section of the coupling section. In this case, the lever receptacle may be formed by two diametrically opposite lever receiving portions. The lever receiving portions may be provided as radially extending slots in the edge portion. The positioning member is in an assembled state of the connecting means in the lever receiving portions. In particular, when the pin receptacle is arranged in a pin end portion, the lever holder can simply slide over the positioning, so that always an exact alignment of the lever or an additional clamping element described in more detail below is made possible.
Der Kopplungsabschnitt kann eine radial innen liegende Kontaktfläche aufweisen, die konisch ausgebildet ist. Insbesondere ist die radial innen liegende Kontaktfläche dem Zapfenelement zugewandt. Beispielsweise umgibt die Kontaktfläche das Zapfenelement, wobei zwischen der Kontaktfläche und dem Zapfenelement ein Abstand vorhanden ist.The coupling portion may have a radially inner contact surface, which is conical. In particular, the radially inner contact surface faces the pin element. For example, the contact surface surrounds the pin member, wherein between the contact surface and the pin member a distance is present.
Die Verbindungseinrichtung kann eine Sicherungshülse aufweisen, die in Axialrichtung an dem Kopplungsabschnitt angeordnet ist. Die Sicherungshülse kann einen Umfangsrand aufweisen, der sich in Axialrichtung etwas über den Kopplungsabschnitt des Hebelelements erstreckt. Hierdurch kann gewährleistet werden, dass das Positionierungselement im zusammengebauten Zustand der Verbindungseinrichtung nicht aus dieser entfernt werden kann.The connecting device may comprise a securing sleeve, which is arranged in the axial direction on the coupling portion. The securing sleeve may have a peripheral edge which extends in the axial direction slightly above the coupling portion of the lever member. This can ensure that the positioning element in the assembled state of the connecting device can not be removed from this.
Die Sicherungshülse kann zwischen der Mutter und dem Kopplungsabschnitt angeordnet sein, derart dass eine von der Mutter ausgeübte Kraft in Axialrichtung auf die Sicherungshülse und den Kopplungsabschnitt übertragen wird. Eine auf den Kopplungsabschnitt des Hebelelements wirkende Axialkraft führt aufgrund des Zusammenwirkens seiner radial inneren Kontaktfläche mit den Kontaktflächen der Spannabschnitte zu einem Anpressen der Spannabschnitte im Wesentlichen in Radialrichtung an das Zapfenelement, so dass das Zapfenelement durch die Spannabschnitte kraftschlüssig gehalten ist.The locking sleeve may be disposed between the nut and the coupling portion such that a force exerted by the nut is transmitted in the axial direction to the locking sleeve and the coupling portion. Due to the interaction of its radially inner contact surface with the contact surfaces of the clamping sections, an axial force acting on the coupling section of the lever element substantially presses the clamping sections radially into the pin element, so that the pin element is frictionally held by the clamping sections.
Das Positionierungselement kann im zusammengebauten Zustand der Verbindungseinrichtung kraftübertragungsfrei aufgenommen sein. Durch die Verwendung des Spannelements kann eine kraftschlüssige Verbindung zwischen dem Hebelelement und dem Zapfenelement hergestellt werden, wobei das Positionierungselement beim Zusammenbau zur korrekten Ausrichtung von Hebelelement und Zapfenelement zueinander dient. Bei einer vom Hebelelement auf das Zapfenelement zu übertragenden Drehbewegung um die Zapfendrehachse wird das Positionierungselement mitgedreht, allerdings überträgt es dabei keine Kräfte vom Hebelelement auf das Zapfenelement.The positioning element can be received without force transmission in the assembled state of the connecting device. By the use of the clamping element, a frictional connection between the lever element and the pin element can be produced, wherein the positioning element during assembly for correct alignment of the lever element and the pin member to each other. In one of the lever element to be transmitted to the pin element rotational movement about the pin rotation axis, the positioning element is rotated, but it does not transmit any forces from the lever element on the pin member.
Der Vollständigkeit halber wird darauf hingewiesen, dass die hier angesprochenen Schaufeln insbesondere verstellbare Schaufeln eines Verdichters der Gasturbine sein können.For the sake of completeness, it is pointed out that the blades mentioned here can be, in particular, adjustable blades of a compressor of the gas turbine.
Die Erfindung betrifft ferner auch eine Gasturbine, insbesondere Fluggasturbine, mit mehreren in Turbinenumfangsrichtung nebeneinander angeordneten verstellbaren Schaufeln, insbesondere Leitschaufeln, wobei an jeder Schaufel eine Verbindungseinrichtung nach einem der vorhergehenden Ansprüche angeordnet ist, und wobei die Hebelelemente der Verbindungseinrichtungen mit einem entlang der Umfangsrichtung der Gasturbine beweglichen Verstellring gekoppelt sind.The invention also relates to a gas turbine, in particular an aircraft gas turbine, with a plurality of adjacently arranged in the turbine circumferential direction adjustable blades, in particular vanes, wherein on each blade a connecting device is arranged according to one of the preceding claims, and wherein the lever elements of the connecting means with a along the circumferential direction of the gas turbine are coupled movable adjusting ring.
Die in Turbinenumfangsrichtung nebeneinander angeordneten verstellbaren Schaufeln können einer Verdichterstufe zugeordnet sein. Ein derartiger verstellbarer Schaufelring kann auch mehrfach an einer Gasturbine vorgesehen sein, so dass für jede Art von Verdichter, wie etwa Niederdruck-, Mitteldruck- oder Hochdruckverdichter an beliebigen Verdichterstufen ein Ring mit verstellbaren Schaufeln vorgesehen werden kann.The adjacently arranged in the turbine circumferential direction adjustable blades can be assigned to a compressor stage. Such an adjustable blade ring can also be provided several times on a gas turbine, so that a ring with adjustable blades can be provided for any type of compressor, such as low pressure, medium pressure or high pressure compressor on any compressor stages.
Nachfolgend wird die Erfindung unter Bezugnahme auf die anliegenden Figuren beispielhaft und nicht einschränkend beschrieben.
-
Fig. 1 zeigt in einer vereinfachten schematischen Darstellung ein Prinzipbild einer Fluggasturbine. -
Fig. 2 zeigt in einer schematischen perspektivischen Darstellung, die teilweise geschnitten ist, eine Verbindungseinrichtung für eine verstellbare Schaufel einer Gasturbine. -
Fig. 3 zeigt in einer schematischen perspektivischen Darstellung ein Hebelelement, ein Positionierungselement und ein Zapfenelement der Verbindungseinrichtung derFig. 2 . -
Fig. 4 zeigt in einer schematischen perspektivischen Darstellung ein Spannelement der Verbindungseinrichtung derFig. 2 . -
Fig. 5 zeigt in einer schematischen Schnittansicht, die etwa einer Schnittlinie V-V derFig. 2 entspricht, einen Ausschnitt einer Gasturbine mit einer Verbindungseinrichtung und mit einem zugeordneten Verstellring. -
Fig. 6 zeigt einen vergrößerten Bereich entsprechend dem gestrichelt umrandeten Bereich VI derFig. 5 .
-
Fig. 1 shows in a simplified schematic representation of a schematic diagram of an aircraft gas turbine. -
Fig. 2 shows in a schematic perspective view, which is partially cut, a connecting device for an adjustable blade of a gas turbine. -
Fig. 3 shows a schematic perspective view of a lever element, a positioning element and a pin member of the connecting device ofFig. 2 , -
Fig. 4 shows a schematic perspective view of a clamping element of the connecting device ofFig. 2 , -
Fig. 5 shows in a schematic sectional view, approximately a section line VV ofFig. 2 corresponds to a section of a gas turbine with a connecting device and with an associated adjusting ring. -
Fig. 6 shows an enlarged area corresponding to the dashed rimmed area VI ofFig. 5 ,
Im dargestellten Beispiel einer Fluggasturbine 10 ist zwischen der Hochdruckturbine 24 und der Niederdruckturbine 26 ein Turbinenzwischengehäuse 34 angeordnet, das um die Wellen 28, 30 angeordnet ist. In seinem radial äußeren Bereich 36 wird das Turbinenzwischengehäuse 34 von heißen Abgasen aus der Hochdruckturbine 24 durchströmt. Das heiße Abgas gelangt dann in einen Ringraum 38 der Niederdruckturbine 26. Von den Verdichtern 28, 32 und den Turbinen 24, 26 sind beispielhaft Laufschaufelkränze 27 dargestellt. Üblicherweise vorhandene Leitschaufelkränze 31 sind aus Gründen der Übersicht beispielhaft nur bei dem Verdichter 32 dargestellt.In the illustrated example of an
Die nachfolgende Beschreibung einer Ausführungsform der Erfindung bezieht sich insbesondere auf verstellbare Leitschaufeln, die beispielsweise Teil eines insgesamt verstellbaren Leitschaufelkranzes 31 sein können. Derartige verstellbare Leitschaufelkränze 31 können auch bei anderen Verdichtern oder ggf. auch bei Turbinen vorgesehen sein, auch wenn dies in der
Die Verbindungseinrichtung 50 umfasst ein Hebelelement 54. Das Hebelelement 54 ist in
Aus der
In der Hebelaufnahme 66 und der Zapfenaufnahme 60 ist ein Positionierungselement 68 aufgenommen. Das Positionierungselement 68 dient dazu, das Zapfenelement 52 und das Hebelelement 54 bezogen auf die Umfangsrichtung UR der Verbindungseinrichtung 50 zueinander auszurichten. Hierzu sind insbesondere die Hebelaufnahme 66 bzw. die Hebelaufnahmeabschnitte 66a, 66b und die Zapfenaufnahme 60 fluchtend zueinander ausgerichtet, so dass das Positionierungselement 68 in der Hebelaufnahme 66 und der Zapfenaufnahme 60 aufgenommen ist. Das Positionierungselement 68 ist insbesondere als plättchenartiges oder flachstabartiges Bauteil ausgebildet. Das Positionierungselement 68 kann auch als Passfeder bezeichnet werden.In the lever receptacle 66 and the
Die Verbindungseinrichtung 50 weist ferner ein Spannelement 70 auf, das in
Zwischen zwei benachbarten Spannabschnitten 74a, 74b bzw. 74a, 74c ist eine jeweilige Ausnehmung 76a bzw. 76b vorgesehen. Die Spannabschnitte 74a, 74b, 74c sind insbesondere in Radialrichtung elastisch beweglich bzw. auslenkbar, insbesondere zu dem Zapfenelement 52 hin bzw. von diesem weg. Die Ausnehmung 76b und eine ihr diametral gegenüberliegende weitere Ausnehmung, die in der gewählten Darstellung der
Die Spannabschnitte 74a, 74b, 74c weisen eine jeweilige äußere Kontaktfläche 80 auf. Die Kontaktflächen 80 sind entlang der Axialrichtung AR konisch ausgeführt. Mit anderen Worten weist das Spannelement 70 im Bereich seiner Spannabschnitte 74a, 74b, 74c einen sich verändernden Durchmesser auf. Die äußeren Kontaktflächen 80 stehen in einem zusammengebauten Zustand der Verbindungseinrichtung 50 in Berührung mit einer radial inneren Kontaktfläche 82 des Hebelelements 54. Die radial innere Kontaktfläche 82 ist insbesondere im Bereich des Kopplungsabschnitts 62 angeordnet. Ferner kann die radial innere Kontaktfläche 82 konisch ausgebildet sein. Entsprechend weist der hülsenartige Kopplungsabschnitt 62 im Bereich der inneren Kontaktfläche 82 einen sich verändernden Innendurchmesser auf.The clamping
Die radial äußere Kontaktfläche 80 der Spannabschnitte 74a, 74b, 74c und die radial innere Kontaktfläche 82 des Kopplungsabschnitts 62 sind komplementär zueinander ausgebildet.The radially
Dabei nimmt der Innendurchmesser bzw. Innenradius des Kopplungsabschnitts 62 und der Außendurchmesser aller Spannabschnitte 74a, 74b, 74c bzw. der Außenradius der Spannabschnitte 74a, 74b, 74c in Richtung der Schaufel 51 (
Das Spannelement 70 weist einen sich axial an die Spannabschnitte 74a, 74b, 74c anschließenden Gewindeabschnitt 84 auf. Der Gewindeabschnitt 84 weist ein in den
Der in
In
Das Spannelement 70 der Verbindungseinrichtung 50 liegt auf einer Führungshülse 100 auf. Die Führungshülse bildet in diesem Beispiel auch ein radiales Lager für das Zapfenelement 52. Die Axialrichtung AR der Verbindungseinrichtung entspricht in Bezug auf die Gasturbine einer Radialrichtung TRR der Gasturbine.The clamping
Bezogen auf die Verbindungseinrichtung 50 weist das Positionierungselement 68 eine in Radialrichtung RR erstreckende Länge VL auf. Die Länge VL des Positionierungselements 68 ist so gewählt, dass sie etwas kleiner ist als der Durchmesser DK des im Wesentlichen kreisförmigen Kopplungsabschnitts 62 bzw. des äußeren Durchmessers des axialen Randabschnitts 64, der ringförmig ausgebildet ist. Das Positionierungselement 68 weist eine Breite VB auf, die kleiner als die axiale Ausdehnung bzw. Tiefe ZT der Zapfenaufnahme 60 ausgebildet ist. Ferner ist die Breite VB des Positionierungselements 68 auch so gewählt, dass sie kleiner ist als die axiale Ausdehnung bzw. Tiefe HT der Hebelaufnahme 66 bzw. der einzelnen Hebelaufnahmeabschnitte 66a, 66b.Relative to the
Die Sicherungshülse 88 weist einen Randabschnitt 102 auf, der eine axiale Länge aufweist, die größer ist als die Breite des Positionierungselements 68. Der Randabschnitt 102 liegt mit seinem axial unteren Ende an einem Außenumfang des Kopplungsabschnitts 62 an. Hierdurch wird gewährleitet, dass das Positionierungselement 68 nicht in Radialrichtung aus der Verbindungseinrichtung 50 entfernbar ist.The securing
Wie sich aus den beschriebenen Größenverhältnissen des Positionierungselements 68 zu anderen Elementen der Verbindungseinrichtung 50 ergibt, ist das Positionierungselement 68 im zusammengebauten Zustand der Verbindungseinrichtung 50 im Wesentlichen kraftübertragungsfrei aufgenommen. Insbesondere überträgt das Positionierungselement 68 keine durch das Hebelelement 54 eingebrachte Drehbewegungen auf das Zapfenelement 52. Die von der utter 86 aufgebrachten in Axialrichtung AR wirkenden Kräfte werden über die Sicherungshülse 88, das Hebelelement 54 bzw. dessen Kopplungsabschnitt 62 auf das Spannelement 70 bzw. dessen Spannabschnitte 74a bis 74d, so dass die Spannabschnitte 74a bis 74d gegen das Zapfenelement 52 gedrückt werden. Dabei ist das Positionierungselement 68 so dimensioniert, dass es beim Zusammenbau der Verbindungseinrichtung 50 eine korrekte Positionierung von Zapfenelement 52, Hebelelement 54 und Spannelement 70 zueinander ermöglicht, insbesondere in Umfangsrichtung UR der Verbindungseinrichtung 50, dass es aber nicht im Kraftübertragungsweg enthalten ist, wenn im zusammengebauten Zustand der Verbindungseinrichtung 50 eine kraftschlüssige Verbindung zwischen dem Hebelelement 54 und dem Zapfenabschnitt 52 hergestellt ist.As is apparent from the described proportions of the
- 1010
- FluggasturbineAircraft gas turbine
- 1212
- Fanfan
- 1414
- Mantelcoat
- 1616
- Verdichtercompressor
- 1818
- inneres Gehäuseinner casing
- 2020
- Brennkammercombustion chamber
- 2222
- Turbineturbine
- 2424
- HochdruckturbineHigh-pressure turbine
- 2626
- NiederdruckturbineLow-pressure turbine
- 2727
- LaufschaufelkranzBlade ring
- 2828
- Hohlwellehollow shaft
- 2929
- HochdruckverdichterHigh-pressure compressors
- 3030
- Wellewave
- 3131
- Leitschaufelkranzvane ring
- 3232
- NiederdruckverdichterLow-pressure compressor
- 3333
- Schubdüseexhaust nozzle
- 3434
- TurbinenzwischengehäuseTurbine center frame
- 3636
- äußerer Bereichouter area
- 3838
- Ringraumannulus
- 5050
- Verbindungseinrichtungconnecting device
- 5151
- Schaufelshovel
- 5252
- Zapfenelementpin element
- 5454
- Hebelelementlever member
- 5656
- Bereich des abgeschnittenen HebelelementsArea of the cut lever element
- 5858
- axiales Ende des Zapfenelementaxial end of the pin member
- 6060
- Zapfenaufnahmepin receiver
- 6262
- Kopplungsabschnittcoupling portion
- 6464
- axialer Randabschnittaxial edge section
- 6666
- Hebelaufnahmelever accommodation
- 66a/b66a / b
- HebelaufnahmeabschnittLever receiving portion
- 6868
- Positionierungselementpositioner
- 7070
- Spannelementclamping element
- 7272
- axiales Endeaxial end
- 74a-d74a-d
- Spannabschnittclamping section
- 76a/b76a / b
- Ausnehmungrecess
- 7878
- Spannaufnahmechip receiver
- 8080
- radial äußere Kontaktflächeradially outer contact surface
- 8282
- radial innere Kontaktflächeradially inner contact surface
- 8484
- Gewindeabschnittthreaded portion
- 8686
- Muttermother
- 8888
- Sicherungshülsesecuring sleeve
- 9090
- Strukturbauteilstructural component
- 9292
- Kopplungsabschnittcoupling portion
- 9494
- Verstelleinrichtungadjustment
- 9696
- Verstellringadjusting
- 9898
- Verstellzapfenadjustment peg
- 100100
- Führungshülseguide sleeve
- 102102
- Randabschnittedge section
Claims (15)
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DE102018202082.5A DE102018202082A1 (en) | 2018-02-09 | 2018-02-09 | Connecting device for an adjustable blade of a gas turbine |
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EP3524781A1 true EP3524781A1 (en) | 2019-08-14 |
EP3524781B1 EP3524781B1 (en) | 2020-09-09 |
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EP19156113.3A Active EP3524781B1 (en) | 2018-02-09 | 2019-02-08 | Connecting device for an adjustable vane of a gas turbine |
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US (1) | US11125115B2 (en) |
EP (1) | EP3524781B1 (en) |
DE (1) | DE102018202082A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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EP4130441A1 (en) | 2021-08-05 | 2023-02-08 | MTU Aero Engines AG | Device for connecting a pivotable vane of a gas turbine and gas turbine |
Families Citing this family (5)
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DE102018202494A1 (en) * | 2018-02-19 | 2019-08-22 | MTU Aero Engines AG | STORAGE CHAMBER HOUSING FOR A FLOW MACHINE |
US11834966B1 (en) | 2022-12-30 | 2023-12-05 | Rolls-Royce North American Technologies Inc. | Systems and methods for multi-dimensional variable vane stage rigging utilizing adjustable alignment mechanisms |
US12000292B1 (en) | 2022-12-30 | 2024-06-04 | Rolls-Royce North American Technologies Inc. | Systems and methods for multi-dimensional variable vane stage rigging |
US11982193B1 (en) | 2022-12-30 | 2024-05-14 | Rolls-Royce North American Technologies Inc. | Systems and methods for multi-dimensional variable vane stage rigging utilizing adjustable inclined mechanisms |
US12000293B1 (en) | 2022-12-30 | 2024-06-04 | Rolls-Royce North American Technologies Inc. | Systems and methods for multi-dimensional variable vane stage rigging utilizing coupling mechanisms |
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US20080031729A1 (en) * | 2006-08-02 | 2008-02-07 | Snecma | Cylindrical-rod device for controlling a variable-pitch vane of a turbomachine |
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2018
- 2018-02-09 DE DE102018202082.5A patent/DE102018202082A1/en active Pending
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2019
- 2019-02-04 US US16/266,612 patent/US11125115B2/en active Active
- 2019-02-08 EP EP19156113.3A patent/EP3524781B1/en active Active
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US20040240990A1 (en) * | 2003-05-27 | 2004-12-02 | Rockley Christopher I. | Variable vane arrangement for a turbomachine |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4130441A1 (en) | 2021-08-05 | 2023-02-08 | MTU Aero Engines AG | Device for connecting a pivotable vane of a gas turbine and gas turbine |
Also Published As
Publication number | Publication date |
---|---|
US20190249572A1 (en) | 2019-08-15 |
US11125115B2 (en) | 2021-09-21 |
DE102018202082A1 (en) | 2019-08-14 |
EP3524781B1 (en) | 2020-09-09 |
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