EP1969206B1 - Closing assembly for closing the gap remaining between the first and last blade of a blade ring that is inserted into the peripheral groove of turbomachinery and corresponding turbomachinery - Google Patents
Closing assembly for closing the gap remaining between the first and last blade of a blade ring that is inserted into the peripheral groove of turbomachinery and corresponding turbomachinery Download PDFInfo
- Publication number
- EP1969206B1 EP1969206B1 EP06841633A EP06841633A EP1969206B1 EP 1969206 B1 EP1969206 B1 EP 1969206B1 EP 06841633 A EP06841633 A EP 06841633A EP 06841633 A EP06841633 A EP 06841633A EP 1969206 B1 EP1969206 B1 EP 1969206B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- assembly
- locking
- circumferential groove
- parts
- sub
- 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.)
- Not-in-force
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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
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
- F01D5/3023—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses
- F01D5/303—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses in a circumferential slot
- F01D5/3038—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses in a circumferential slot the slot having inwardly directed abutment faces on both sides
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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
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
- F01D5/32—Locking, e.g. by final locking blades or keys
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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
- F01D9/00—Stators
- F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
- F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
- F01D9/042—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector fixing blades to stators
Definitions
- the invention relates to a closing assembly for closing the remaining gap between the first and the last used in a circumferential groove of a turbomachine blade of a blade ring, consisting of at least two side parts, of which at least one can be hooked with an undercut forming a projection of the circumferential groove and at least one securing element , which secures the parts against detachment from the circumferential groove.
- Both end assemblies essentially consist of two side parts, which are inserted into the remaining space between the first and the last blade of a blade ring. Since each side part in each case interlocks with a projection of the circumferential groove forming the undercut, and thus both side parts can be introduced into the intermediate space, both side parts together - viewed in the axial direction - are narrower than the intermediate space to be filled up and closed. After the assembly of the two side parts in turn remains a space between them free, which must be filled with an intermediate part.
- the intermediate part secures the two side parts against an axial displacement which releases the respective entanglement and thus against detachment from the circumferential groove.
- this is equipped with two lip-like webs, which are each inflected by plastic deformation in a provided on each side panel bag.
- the intermediate part is positively locked with each side part, which also causes the two Side parts are kept in the circumferential groove.
- the US 2002 / 0127105A1 also proposes that the intermediate part is hooked via a dovetail with the first and the last blade of the blade ring, whereas according to the EP 1 457 642 A1 each side part of the final assembly is hooked to the first and the last blade of the blade ring. Thereby, a gap formation and enlargement between adjacent blades and the final assembly in the circumferential direction is substantially prevented.
- a screw is provided in the middle, conically shaped in cross-section intermediate part.
- the screw which is supported on the groove base can lift the intermediate part in the direction of the slot opening. Due to arranged on the side parts, corresponding to the intermediate part inclined side surfaces, these can be hooked securely each with the circumferential groove by lifting the intermediate part.
- a rotor closure for rotors of thermal turbomachines which consists of two end halves.
- the two end halves are connected by a dovetail attachment when installed.
- the elements of the dovetail suspension are formed on the two halves in such a way that the dovetail suspension is produced by a displacement of the two halves directed towards one another in the circumferential direction.
- the rotor closure of DE 103 10 431 A1 There is a further remaining space between the blades used, which, however, can be distributed along the circumference of the circumferential groove.
- the parts are successively inserted into the circumferential groove and then releasably connected together by means of a pin-like securing element.
- a pin-like securing element So far, in the prior art designed as an intermediate part securing element was positively held between the side parts, so that the final assembly was secured as a whole against detachment from the circumferential groove.
- the invention is based on the knowledge that contrary to the usual Conceived a detachable connection of the parts of the final assembly solves the task reliable.
- the final assembly can be detached from the circumferential groove non-destructively by also removing the securing element used with a suitable tool.
- all already used parts can be reused, which saves manufacturing costs.
- the releasable connection can be made by a locking screw.
- the invention for the first time also specifies a first embodiment in which only the first part inserted into the circumferential groove, for example the front side part, can be hooked with a projection of the circumferential groove.
- the second inserted, the rear side part of the end assembly is used to cover the remaining opening of the gap after insertion of the first side part.
- the second side part prevents a displacement of the first side part, which could solve its entanglement.
- the force acting on the two side parts of the final assembly centrifugal load is taken in total by the projection, which is hooked to the first side part. Consequently, the hooked with the projection first side member prevents the detachment of the final assembly as a whole from the circumferential groove.
- a dovetail guide In order to prevent an axially directed gap formation between two adjoining parts due to a game formation or due to the parts pressing apart parts securing element, these are positively interlocked with each other via a dovetail guide.
- the dovetail guide thus allows an entanglement of two adjacent parts of the final assembly, which ensures a detachable and, depending on the requirements, a particularly reliable frictional connection of the parts of the final assembly by means of the securing element. An unwanted release of the fuse element by moving away from each other Securing element encompassing parts is thus safely avoided.
- the dovetail guide is arranged in such a way on the parts of the final assembly, that engage in the radial insertion of the last part, the elements of the dovetail guide into one another. During the insertion of the last part of this is hooked together with the already used part or with the parts already used.
- This has the advantage that the closing assembly completely, that is to say in the circumferential direction, completely encloses the space to be filled of the circumferential groove. can fill without play. A displacement of the blades used in the circumferential groove both after assembly of the final assembly and during operation of the turbomachine can be safely avoided.
- the closing assembly comprises an intermediate part which can be inserted between the two lateral parts which can now be hooked up with the circumferential groove. Since each side part can be hooked in each case with a protruding on a side wall of the circumferential groove and protruding in the axial direction projection, and the two side parts are successively inserted into the circumferential groove, between these another space, which is filled by the subsequently inserted intermediate part. The filling of the further space prevents the displacement of the side parts in the axial direction, so that their secure entanglement remains ensured.
- the securing element is arranged such that both the two side parts as well as the intermediate part of the closing assembly located therebetween are detachably connected to one another. The individual parts of the final assembly and these as a whole are then secured against detachment from the circumferential groove.
- each fuse element connects only two of the three parts of the end assembly together, whereby the mechanical load of each fuse element with respect to the configuration with only one securing element is lower.
- the two adjoining side parts or each side part is adjacent to each other at the intermediate part in a contact plane, wherein the securing element or the securing elements extends or extend longitudinally within the contact plane.
- the fuse element is therefore arranged in half in the contact plane and connects two adjacent parts releasably together.
- the securing element or the securing elements can extend transversely through the contact plane, through one of the two or both contact planes.
- a detachable final assembly can be achieved in particular advantageously with a non-positive connection.
- the force acting on the two frictionally interconnected side parts of the final assembly centrifugal load is taken in total by the projection or the projections, which is or which is hooked to the side part or the side parts.
- a particularly easily detachable final assembly can be specified with a further embodiment in which the securing element is a locking screw.
- the locking screw connects at least two parts of the securing element frictionally with each other.
- At least one threaded section for the locking screw is provided in each part of the final assembly.
- the aligned threaded sections take a common locking screw for possibly frictionally connecting the parts, so that the locking screw extends transversely through the contact plane at which the two parts abut each other.
- the thread can be divided over its entire height into two threaded halves, each half of the thread being disposed on one of the parts of the end assembly.
- each thread of the thread is divided into two halves, one half being provided at a first of two abutting parts in a contact plane and the other half of each thread being disposed at the second of the two abutting parts.
- the halves are designated as such, they do not have to be the same size.
- a locking screw By using a locking screw a particularly reliable and again releasable and possibly non-positive connection of the parts of the final assembly is given, which reliably prevents a detachment of the parts of the final assembly from the circumferential groove even with a force acting on the final assembly centrifugal load.
- the locking screw itself is secured against loosening due to the increased frictional forces due to the centrifugal force.
- the provision of the dovetail guide reliably prevents moving away from each other, the two threaded halves, whereby the release of the encompassed locking screw is reliably prevented.
- the locking screw is designed as a grub screw so that the necessary for screwing and unscrewing approach for a turning tool requires no additional space.
- each part can be applied to a side wall, the one of the undercut forming projection of the circumferential groove is formed. This prevents the entire end assembly as a unit from twisting within the circumferential groove as the clearance between the first and last blades of the blade ring increases in the circumferential direction for unpredictable reasons. Even for this case, the proposed development provides a particularly reliable and secure against detachment from the circumferential groove final assembly.
- the securing element can additionally be mechanically secured against loosening, for example by means of an attachment.
- the closing assembly is provided for closing the gap of a circumferential groove, which is arranged in a rotor of a turbomachine.
- FIG. 2 . 5 and FIG. 6 each show a section of a plan view of a circumferential groove 10, in which blades 12a, 12b of an axial compressor of a gas turbine are used.
- the invention could also be used in a steam turbine or in a turbine unit of the gas turbine.
- the endless circumferential groove 10 is provided on an outer surface 11 of the rotor of the compressor.
- the circumferential groove 10 could also be provided on an annular inner housing of the compressor, are mounted in the guide vanes.
- the circumferential groove 10 has seen in the axial direction of the rotor a front side wall 16 and a rear side wall 18, on each of which extending in the circumferential direction and extending in the axial direction projections 20, 22 are arranged, each having a front and a rear undercut 24, 26th form ( FIG. 1, FIG. 3 and FIG. 4 ).
- blades 12a, 12b are used, which have to the undercuts 24, 26 corresponding executed, hammer-shaped blade roots.
- the blades 12a, 12b inserted into the circumferential groove 10 and then so far, for example, rotated by 45 ° or 60 ° until the hammer-shaped blade roots, the projections 20, 22 engage behind.
- the first, in 1 and FIG. 2 shown embodiment of the invention is characterized essentially by the fact that the final assembly comprises only a front side part 30 and a rear side part 32, wherein only the front side part 30 is hooked to the projection 20 of the circumferential groove 10.
- the front side part 30 is seen in cross-section ( FIG. 1 ) C-shaped and has an outer arm 50 and an inner arm 52, which are interconnected via a radially extending web 54.
- the inner arm 52 engages the undercut 24, which is formed by the projection 20. Consequently, the arm 52 abuts the projection 20 and prevents it from falling out of the circumferential groove 10.
- the rear side member 32 closes the opening of the gap 28 after the front side member 30 has been inserted into the space 28 of the circumferential groove 10.
- the first embodiment of the invention is characterized in particular by the fact that the rear side part 32 viewed in cross-section is only L-shaped and not, like the front side part 30, C-shaped.
- the rear side part 32 does not engage in the undercut 26 and is not hooked to the projection 22.
- the front side part 30 is how FIG. 2 shows, with the rear side portion 32 via a dovetail guide 46 positively interlocked.
- the dovetail guide 46 comprises two elements, a recess with undercuts and a corresponding thereto designed extension, which can engage behind the undercuts of the recess.
- One of each of the elements is provided on one of the dovetail guide parts.
- Both the recess with the undercuts and the extension have an outline in the form of a dovetail seen in cross-section - ie perpendicular to the guide direction.
- the dovetail guide 46 of the end assembly 33 is so aligned, that during the radial insertion of the rear side part 32 in the circumferential groove 10 this is hooked with the already inserted front side part 30.
- the dovetail guide 46 prevents possible gap formation between the two side parts 30, 32.
- the front side part 30 and the rear side part 32 are in a contact plane 48 to each other.
- a bore 62 having an internal thread 61 is provided, in which the securing element 36 designed as a securing screw 64 is screwed.
- the internal thread 61 is arranged in half in the front side part 30 and in the rear side part 32. Half means that one half of each thread of the internal thread 61 on the front side part 30 and the other half of each thread on the rear side part 32 is formed.
- the two side parts 30, 32 are releasably connected to each other again.
- the grub screw can be clamped in the expiring internal thread 61 to form a particularly high frictional engagement. Due to the axial gap formation between the two parts 30, 32 prevented by the dovetail guide 46, the locking screw 64 is reliably screwed into the internal thread 61, although this is formed by two separate parts 30, 32.
- the assembled closing assembly 33 is held over the entanglement of the front side part 30 with the projection 20 as a whole in the circumferential groove 10 and thus secured against detachment from the circumferential groove 10.
- the rear side part 32 is securely held in spite of a lack of entanglement with the projection 22 in the circumferential groove, since the force acting on the rear side part 32 centrifugal forces are transmitted by means of the locking screw 64 on the front side part 30, so that the rear side part 32 indirectly also by the projection 20, which serves as an abutment for the interlocked inner arm 52 is worn.
- FIG. 3 shows a second embodiment of the invention, in which the closing assembly of three, can be inserted into the space 28 parts 130, 131, 132 consists.
- the two lateral, in cross-section C-shaped side parts 130, 131 are inserted one after the other in the circumferential groove 10 and axially displaced so that their respective inner arms 52 are hooked to the projections 20 and 22, respectively, by each arm 52 in one of the Undercuts 24, 26 engages.
- the remaining space between these two side parts 130, 131 space is filled by the insertion of an intermediate part 132, which secures the two side parts 130, 131 against axial displacement and prevents the release of the entanglement.
- the intermediate part 132 has an axially extending width B, which corresponds at least to the dimension a, with which the projection 20 or 22 projects into the circumferential groove 10 in the axial direction.
- the parts 130 and 132 lie in a contact plane 148 and the parts 131 and 132 in a contact plane 149 to each other.
- a bore 162 extends obliquely through the contact planes 148 and 149.
- a pin-like securing element 136 is provided, which can be inserted into the bore 162.
- the bore 162 extends along an axis 140, which obliquely penetrates the contact surfaces 148, 149 and the three parts 130, 132, 131.
- an internal thread 161 is provided, in which formed as a locking screw 164 fuse element 136 can be screwed.
- the three parts, 130, 131, 132 which each have a threaded portion, releasably connected to each other, whereby the intermediate piece 132 and the end assembly 133 are secured as a whole against detachment from the circumferential groove. It is even possible that only that intermediate part 132 has the internal thread 161 and the locking screw 164 is supported on the groove bottom of the circumferential groove 10 in order to secure the end assembly 133 as a whole. In addition, instead of a support on the groove bottom of the circumferential groove and a screw head provided with a locking screw 164 the side parts 130, 132 and this force-locking with each other.
- the parts 130, 131 132 of the end assembly 133 may be hooked together with a dovetail guide according to the first embodiment.
- the three parts 130, 132, 131 could also be secured by two securing elements which are axially offset from one another.
- the securing element 136 would merely frictionally interconnect the side part 131 with the intermediate part 132 and another, not shown, also obliquely extending securing element only the two parts 130 and 132.
- a dovetail guide the parts 130, 132, and 131, 132 interconnect are also obliquely extending securing element only the two parts 130 and 132.
- a third embodiment of the invention shows FIG. 4 in a cross-sectional view and FIG. 5 in a top view.
- the successive insertable into the circumferential groove 10 side parts 230, 231 are each hooked with one of the projections 20 and 22 respectively.
- the two side parts 230, 231 are formed in cross-section substantially C-shaped and each have an outer arm 250 which partially closes the gap 28 to the outside partially, and an inner arm 252 which hooks with the projections 20, 22 is.
- the inner arms 250 are connected to the outer arms 252 by a web 254, respectively.
- an intermediate part 232 is provided, which secures the two side parts 230, 231 against axial displacement and thus against loosening the entanglement.
- the intermediate part 232 has an axially extending width B, which corresponds at least to the dimension a, with which each projection 20 or 22 projects into the circumferential groove 10 in the axial direction. If this condition is not fulfilled, the second part 130 or 131 to be inserted into the groove can not be used.
- FIG. 5 shows the top view of the third embodiment of the invention according to FIG. 4 ,
- the intermediate part 232 abuts in a contact surface 248 on the front side part 230 and is hooked thereto via a first dovetail guide 246.
- a dovetail-shaped projection and the front side part 230, the corresponding corresponding receptacle is formed on the intermediate part 232.
- the rear side part 231 is hooked to the intermediate part 232, wherein these lie in a contact surface 249 against each other.
- the dovetail-shaped extension is provided on the rear side part 231 and the correspondingly shaped recess on the intermediate part 232.
- the second dovetail guide 247 viewed in the circumferential direction can be made narrower than the first dovetail guide 246 to allow axial insertion of the narrower dovetailed extension in the larger recess during assembly of the second side member 231 or 230 and maximizing this to reach the centrifugally stressed cross sections of the webs 254.
- a pin-like Secured element 236 is provided, which is designed as a locking screw 264.
- at least one bore 262 is provided in each contact plane 248, 249.
- Each bore 262 is provided with an internal thread 263, which are each arranged in half in two parts 230, 231 and 231, 232.
- the pin-like securing elements 236 designed as securing screws 264 can be screwed into these internal threads 263 for frictionally and / or positively locking the parts 230, 231, 232 of the end assembly 233.
- each internal thread 263 is arranged in half each in two parts 230, 232 and 231, 232, a reliable and secure against loosening screw is possible because the two each female thread 263 forming parts 230, 232 and 231, 232 by means of the respective dovetail guide 246th , 247 are not axially displaced apart.
- FIG. 6 shows the top view of a variant of the third embodiment.
- the dovetail guide 247 between the parts 232 and 231, based on FIG. 5 Conversely formed.
- Both dovetail-shaped extensions are arranged on the intermediate part 232 and each side part 230, 231 has in the corresponding contact surfaces 248, 249 a recess for receiving the respective extension.
- a locking screw 64, 164, 264 could also be a pin-like bolt in the bore 62, 162, 262 are used, which secured by a press fit against loosening is. To remove the end assembly this would only have to be drilled out.
- a screw head provided with a locking screw 64, 164, 264 could be screwed into each lock assembly 33, wherein the recessed into one or more of the parts 30, 32, 130, 131, 132, 230, 231, 232 screw head biased against this ,
- a device for closing the remaining gap between the first and the last inserted in a circumferential groove blades of a blade ring can be specified, which can be easily assemble and disassemble. Since the assembly of the final assembly no.plastic deformation of the components requires, but proposes the non-positive connection of the parts, they can be solved by disassembled steps performed and disassembled. All components of the final assembly can be reused. In addition, the simple design allows a relatively low production cost.
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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)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
- Threshing Machine Elements (AREA)
Abstract
Description
Die Erfindung betrifft eine Schlussbaugruppe zum Schließen des verbleibenden Zwischenraumes zwischen der ersten und der letzten in einer Umfangsnut einer Strömungsmaschine eingesetzten Schaufel eines Schaufelkranzes, bestehend aus mindestens zwei Seitenteilen, von denen mindestens eines mit einem eine Hinterschneidung bildenden Vorsprung der Umfangsnut verhakbar ist und mindestens einem Sicherungselement, welches die Teile gegen Herauslösen aus der Umfangsnut sichert.The invention relates to a closing assembly for closing the remaining gap between the first and the last used in a circumferential groove of a turbomachine blade of a blade ring, consisting of at least two side parts, of which at least one can be hooked with an undercut forming a projection of the circumferential groove and at least one securing element , which secures the parts against detachment from the circumferential groove.
Schlussbaugruppen derartiger Gattung gehen beispielsweise aus der
Nachteilig bei der bekannten Schlussbaugruppe ist jedoch, dass zum Entfernen der Schlussbaugruppe diese zumindest teilweise im Bereich des Formschlusses aufwändig zerstört werden muss. Außerdem ist zu beachten, dass die Schlussbaugruppe den auftretenden thermischen und mechanischen Belastungen, insbesondere der beim Betrieb auftretenden Fliehkraft, sofern sie im Rotor einer Strömungsmaschine montiert ist, standhalten muss.A disadvantage of the known final assembly, however, that for the removal of the final assembly this must be destroyed consuming at least partially in the field of positive engagement. It should also be noted that the final assembly must withstand the occurring thermal and mechanical loads, in particular the centrifugal force occurring during operation, if it is mounted in the rotor of a turbomachine.
Ferner ist aus der Offenlegungsschrift
Des Weiteren ist aus der
Darüber hinaus ist aus der
Dementsprechend ist es die Aufgabe der Erfindung die Schaffung einer Schlussbaugruppe zum vollständigen Schließen des verbleibenden Zwischenraums zwischen der ersten und der letzten in einer Umfangsnut einer Strömungsmaschine eingesetzten Schaufel eines Schaufelkranzes, welche einfach und kostengünstig lösbar ist und dennoch die hohen mechanischen Beanspruchungen zuverlässig und langlebig erträgt.Accordingly, it is the object of the invention to provide a closing assembly for completely closing the remaining gap between the first and the last used in a circumferential groove of a turbomachine blade of a blade ring, which is simple and inexpensive solvable and yet the high mechanical stresses reliable and durable endures.
Zur Lösung der Aufgabe wird gemäß der Erfindung eine gattungsgemäße Schlussbaugruppe angegeben, welche nach den Merkmalen des Anspruchs 1 ausgestaltet ist.To achieve the object, a generic final assembly is specified according to the invention, which is designed according to the features of claim 1.
Gemäß der Erfindung werden die Teile nacheinander in die Umfangsnut eingesetzt und anschließend mittels eines stiftartigen Sicherungselementes lösbar miteinander verbunden. Bisher wurde beim Stand der Technik das als Zwischenteil ausgebildete Sicherungselement formschlüssig zwischen den Seitenteilen gehalten, sodass die Schlussbaugruppe als Ganzes gegen Herauslösen aus der Umfangsnut gesichert war. Die Erfindung geht nun von der Erkenntnis aus, dass entgegen der gängigen Auffassung eine lösbare Verbindung der Teile der Schlussbaugruppe die Aufgabe zuverlässig löst. Darüber hinaus kann die Schlussbaugruppe zerstörungsfrei aus der Umfangsnut gelöst werden, indem das mit einen geeigneten Werkzeug eingesetzte Sicherungselement ebenso entfernt wird. Darüber hinaus können alle bereits einmal verwendeten Teile wieder verwendet werden, was Herstellungskosten spart. Beispielsweise kann die lösbare Verbindung durch eine Sicherungsschraube hergestellt werden.According to the invention, the parts are successively inserted into the circumferential groove and then releasably connected together by means of a pin-like securing element. So far, in the prior art designed as an intermediate part securing element was positively held between the side parts, so that the final assembly was secured as a whole against detachment from the circumferential groove. The invention is based on the knowledge that contrary to the usual Conceived a detachable connection of the parts of the final assembly solves the task reliable. In addition, the final assembly can be detached from the circumferential groove non-destructively by also removing the securing element used with a suitable tool. In addition, all already used parts can be reused, which saves manufacturing costs. For example, the releasable connection can be made by a locking screw.
Außerdem wird mit der Erfindung erstmalig auch eine erste Ausgestaltung angegeben, bei der lediglich das zuerst in die Umfangsnut eingesetzte Seitenteil, beispielsweise das vordere Seitenteil, mit einem Vorsprung der Umfangsnut verhakbar ist. Das als zweites eingesetzte, hintere Seitenteil der Schlussbaugruppe dient zur Abdeckung der verbleibenden Öffnung des Zwischenraums nach dem Einsetzen des ersten Seitenteils. Ferner verhindert das zweite Seitenteil eine Verschiebung des ersten Seitenteils, was dessen Verhakung lösen könnte. Die auf die beiden Seitenteile der Schlussbaugruppe wirkende Fliehkraftbelastung wird insgesamt von dem Vorsprung aufgenommen, welcher mit dem ersten Seitenteil verhakt ist. Folglich verhindert das mit dem Vorsprung verhakte erste Seitenteil das Herauslösen der Schlussbaugruppe als Ganzes aus der Umfangsnut.In addition, the invention for the first time also specifies a first embodiment in which only the first part inserted into the circumferential groove, for example the front side part, can be hooked with a projection of the circumferential groove. The second inserted, the rear side part of the end assembly is used to cover the remaining opening of the gap after insertion of the first side part. Furthermore, the second side part prevents a displacement of the first side part, which could solve its entanglement. The force acting on the two side parts of the final assembly centrifugal load is taken in total by the projection, which is hooked to the first side part. Consequently, the hooked with the projection first side member prevents the detachment of the final assembly as a whole from the circumferential groove.
Um eine axialgerichtete Spaltbildung zwischen zwei aneinander liegenden Teilen aufgrund einer Spielbildung oder aufgrund des die Teile auseinander drückenden Sicherungselementes zu verhindern, sind diese über eine Schwalbenschwanzführung formschlüssig miteinander verhakt. Die Schwalbenschwanzführung ermöglicht somit eine Verhakung zweier aneinander liegender Teile der Schlussbaugruppe, was eine lösbare und, je nach Anforderung, eine besonders zuverlässige kraftschlüssige Verbindung der Teile der Schlussbaugruppe mittels des Sicherungselementes gewährleistet. Ein ungewolltes Herauslösen des Sicherungselementes durch voneinander weg Bewegen der das Sicherungselement umgreifenden Teile ist somit sicher vermieden.In order to prevent an axially directed gap formation between two adjoining parts due to a game formation or due to the parts pressing apart parts securing element, these are positively interlocked with each other via a dovetail guide. The dovetail guide thus allows an entanglement of two adjacent parts of the final assembly, which ensures a detachable and, depending on the requirements, a particularly reliable frictional connection of the parts of the final assembly by means of the securing element. An unwanted release of the fuse element by moving away from each other Securing element encompassing parts is thus safely avoided.
Vorteilhafte Ausgestaltungen der Erfindungen sind in den abhängigen Patentansprüchen angegeben.Advantageous embodiments of the inventions are specified in the dependent claims.
Vorzugsweise ist die Schwalbenschwanzführung dabei derart an den Teilen der Schlussbaugruppe angeordnet, dass beim radialen Einsetzen des letzten Teiles die Elemente der Schwalbenschwanzführung ineinander greifen. Während des Einsetzvorganges des letzten Teiles wird dieses mit dem bereits eingesetzten Teil oder mit den bereits eingesetzten Teilen miteinander verhakt. Dies hat den Vorteil, dass die Schlussbaugruppe den zu füllenden Zwischenraum der Umfangsnut in Umfangsrichtung gesehen vollständig, d.h. ohne Spiel ausfüllen kann. Ein Verschieben der in der Umfangsnut eingesetzten Laufschaufeln sowohl nach der Montage der Schlussbaugruppe als auch während des Betriebes der Strömungsmaschine kann so sicher vermieden werden.Preferably, the dovetail guide is arranged in such a way on the parts of the final assembly, that engage in the radial insertion of the last part, the elements of the dovetail guide into one another. During the insertion of the last part of this is hooked together with the already used part or with the parts already used. This has the advantage that the closing assembly completely, that is to say in the circumferential direction, completely encloses the space to be filled of the circumferential groove. can fill without play. A displacement of the blades used in the circumferential groove both after assembly of the final assembly and during operation of the turbomachine can be safely avoided.
Im Rahmen einer zweiten Ausgestaltung der Erfindung umfasst die Schlussbaugruppe ein Zwischenteil, welches zwischen den zwei, nun jeweils mit der Umfangsnut verhakbaren Seitenteilen einfügbar ist. Da jedes Seitenteil jeweils mit einem an einer Seitenwand der Umfangsnut umlaufenden und in Axialrichtung hervorstehenden Vorsprung verhakbar ist, und die beiden Seitenteile nacheinander in die Umfangsnut eingesetzt werden, verbleibt zwischen diesen ein weiterer Raum, der durch das anschließend eingefügte Zwischenteil aufgefüllt wird. Die Auffüllung des weiteren Raums verhindert die Verschiebung der Seitenteile in Axialrichtung, sodass deren sichere Verhakung gewährleistet bleibt. Das Sicherungselement ist so angeordnet, dass sowohl die beiden Seitenteile als auch das dazwischen liegende Zwischenteil der Schlussbaugruppe lösbar miteinander verbunden sind. Die einzelnen Teile der Schlussbaugruppe und diese als Ganzes sind dann gegen Herauslösen aus der Umfangsnut gesichert.In the context of a second embodiment of the invention, the closing assembly comprises an intermediate part which can be inserted between the two lateral parts which can now be hooked up with the circumferential groove. Since each side part can be hooked in each case with a protruding on a side wall of the circumferential groove and protruding in the axial direction projection, and the two side parts are successively inserted into the circumferential groove, between these another space, which is filled by the subsequently inserted intermediate part. The filling of the further space prevents the displacement of the side parts in the axial direction, so that their secure entanglement remains ensured. The securing element is arranged such that both the two side parts as well as the intermediate part of the closing assembly located therebetween are detachably connected to one another. The individual parts of the final assembly and these as a whole are then secured against detachment from the circumferential groove.
Eine besonders günstige Sicherung gegen Herauslösen aus der Umfangsnut ist gegeben, wenn die Schlussbaugruppe ein weiteres stiftartiges Sicherungselement umfasst, wobei jedes Seitenteil mit dem Zwischenteil jeweils mittels einem der beiden stiftartigen Sicherungselemente gesichert ist. Somit verbindet jedes Sicherungselement lediglich zwei der drei Teile der Schlussbaugruppe miteinander, wodurch die mechanische Belastung jedes Sicherungselementes gegenüber der Ausgestaltung mit lediglich einem Sicherungselement geringer ist.A particularly favorable safeguard against detachment from the circumferential groove is provided when the closing assembly comprises a further pin-like securing element, wherein each side part is secured to the intermediate part in each case by means of one of the two pin-like securing elements. Thus, each fuse element connects only two of the three parts of the end assembly together, whereby the mechanical load of each fuse element with respect to the configuration with only one securing element is lower.
In einer besonders vorteilhaften Weiterbildung der Erfindung liegen die beiden aneinander liegenden Seitenteile oder liegt jedes Seitenteil an dem Zwischenteil in einer Kontaktebene aneinander, wobei das Sicherungselement bzw. die Sicherungselemente sich längs innerhalb der Kontaktebene erstreckt bzw. erstrecken. Das Sicherungselement ist demnach hälftig in der Kontaktebene angeordnet und verbindet jeweils zwei aneinander liegende Teile lösbar miteinander.
Alternativ zur letztgenannten Ausgestaltung kann das Sicherungselement bzw. können die Sicherungselemente sich quer durch die Kontaktebene, durch eine der beiden oder durch beide Kontaktebenen erstrecken.In a particularly advantageous embodiment of the invention, the two adjoining side parts or each side part is adjacent to each other at the intermediate part in a contact plane, wherein the securing element or the securing elements extends or extend longitudinally within the contact plane. The fuse element is therefore arranged in half in the contact plane and connects two adjacent parts releasably together.
As an alternative to the last-mentioned embodiment, the securing element or the securing elements can extend transversely through the contact plane, through one of the two or both contact planes.
Eine lösbare Schlussbaugruppe kann insbesondere Vorteilhaft mit einer kraftschlüssigen Verbindung erreicht werden. Die auf die beiden kraftschlüssig miteinander verbundenen Seitenteile der Schlussbaugruppe wirkende Fliehkraftbelastung wird insgesamt von dem Vorsprung oder den Vorsprüngen aufgenommen, welcher bzw. welche mit dem Seitenteil bzw. den Seitenteilen verhakt ist.A detachable final assembly can be achieved in particular advantageously with a non-positive connection. The force acting on the two frictionally interconnected side parts of the final assembly centrifugal load is taken in total by the projection or the projections, which is or which is hooked to the side part or the side parts.
Eine besonders einfach lösbare Schlussbaugruppe kann mit einer weiteren Ausgestaltung angegeben werden, bei der das Sicherungselement eine Sicherungsschraube ist. Die Sicherungsschraube verbindet mindestes zwei Teile des Sicherungselementes kraftschlüssig miteinander. In jedem Teil der Schlussbaugruppe ist mindestens ein Gewindeabschnitt für die Sicherungsschraube vorgesehen. Die fluchtenden Gewindeabschnitte nehmen eine gemeinsame Sicherungsschraube zum ggf. kraftschlüssigen Verbinden der Teile auf, sodass sich die Sicherungsschraube quer durch die Kontaktebene, an der die beiden Teile aneinander liegen, erstreckt. Alternativ dazu kann das Gewinde über seine gesamte Höhe in zwei Gewindehälften aufgeteilt sein, wobei jede Hälfte des Gewindes an einem der Teile der Schlussbaugruppe angeordnet ist. Darunter ist zu verstehen, dass jeder Gewindegang des Gewindes in zwei Hälften unterteilt ist, wobei eine Hälfte an einem ersten von zwei in einer Kontaktebene aneinander liegenden Teilen vorgesehen ist und die andere Hälfte jedes Gewindeganges an dem zweiten der beiden aneinander liegenden Teile angeordnet ist. Obwohl die Hälften als solche bezeichnet sind, müssen diese nicht identisch groß sein.A particularly easily detachable final assembly can be specified with a further embodiment in which the securing element is a locking screw. The locking screw connects at least two parts of the securing element frictionally with each other. At least one threaded section for the locking screw is provided in each part of the final assembly. The aligned threaded sections take a common locking screw for possibly frictionally connecting the parts, so that the locking screw extends transversely through the contact plane at which the two parts abut each other. Alternatively, the thread can be divided over its entire height into two threaded halves, each half of the thread being disposed on one of the parts of the end assembly. By this is meant that each thread of the thread is divided into two halves, one half being provided at a first of two abutting parts in a contact plane and the other half of each thread being disposed at the second of the two abutting parts. Although the halves are designated as such, they do not have to be the same size.
Durch die Verwendung einer Sicherungsschraube ist eine besonders zuverlässige und wieder lösbare und ggf. kraftschlüssige Verbindung der Teile der Schlussbaugruppe gegeben, was selbst bei einer auf die Schlussbaugruppe einwirkenden Fliehkraftbelastung ein Herauslösen der Teile der Schlussbaugruppe aus der Umfangsnut sicher verhindert. Außerdem ist die Sicherungsschraube aufgrund der durch die Fliehkraft erhöhten Reibungskräfte selber gegen ein Lösen gesichert.By using a locking screw a particularly reliable and again releasable and possibly non-positive connection of the parts of the final assembly is given, which reliably prevents a detachment of the parts of the final assembly from the circumferential groove even with a force acting on the final assembly centrifugal load. In addition, the locking screw itself is secured against loosening due to the increased frictional forces due to the centrifugal force.
Insbesondere das Vorsehen der Schwalbenschwanzführung verhindert sicher das voneinander weg Bewegen der beiden Gewindehälften, wodurch das Lösen der davon umgriffenen Sicherungsschraube zuverlässig vermieden wird.In particular, the provision of the dovetail guide reliably prevents moving away from each other, the two threaded halves, whereby the release of the encompassed locking screw is reliably prevented.
Um eine besonders aerodynamische Oberfläche der Schlussbaugruppe zu erhalten, welche die Öffnung des Zwischenraumes annähernd bündig abschließt, ist die Sicherungsschraube als Madenschraube ausgebildet, so dass der zum Einschrauben und Ausschrauben nötige Ansatz für ein Verdrehwerkzeug keinen zusätzlichen Raumbedarf benötigt.In order to obtain a particularly aerodynamic surface of the final assembly, which closes the opening of the intermediate space approximately flush, the locking screw is designed as a grub screw so that the necessary for screwing and unscrewing approach for a turning tool requires no additional space.
Besonders vorteilhaft stellt sich die Ausgestaltung dar, bei der jedes Teil an eine Seitenwand anlegbar ist, die von einem die Hinterschneidung bildenden Vorsprung der Umfangsnut gebildet ist. Dadurch wird verhindert, dass die gesamte Schlussbaugruppe als Einheit sich innerhalb der Umfangsnut verdrehen kann, wenn der Zwischenraum zwischen der ersten und der letzten Schaufel des Schaufelkranzes sich aus unvorhersehbaren Gründen in Umfangsrichtung vergrößert. Selbst für diesen Fall wird mit der vorgeschlagenen Weiterbildung eine besonders zuverlässige und gegen Herauslösen aus der Umfangsnut gesicherte Schlussbaugruppe angegeben.Particularly advantageous is the embodiment in which each part can be applied to a side wall, the one of the undercut forming projection of the circumferential groove is formed. This prevents the entire end assembly as a unit from twisting within the circumferential groove as the clearance between the first and last blades of the blade ring increases in the circumferential direction for unpredictable reasons. Even for this case, the proposed development provides a particularly reliable and secure against detachment from the circumferential groove final assembly.
Um eine besonders zuverlässige, gegen Herauslösen aus der Umfangsnut gesicherte Schlussbaugruppe anzugeben, kann das Sicherungselement zusätzlich mechanisch gegen Lösen gesichert sein, beispielsweise mittels einer Anstemmung.
Üblicherweise ist die Schlussbaugruppe zum Schließen des Zwischenraums einer Umfangsnut vorgesehen, welche in einem Rotor einer Strömungsmaschine angeordnet ist.In order to specify a particularly reliable closing assembly secured against detachment from the circumferential groove, the securing element can additionally be mechanically secured against loosening, for example by means of an attachment.
Usually, the closing assembly is provided for closing the gap of a circumferential groove, which is arranged in a rotor of a turbomachine.
Die weitere Erläuterung der Erfindung erfolgt anhand der in der Zeichnung dargestellten Ausführungsbeispiele.The further explanation of the invention will be made with reference to the embodiments illustrated in the drawings.
Im Einzelnen zeigen
- FIG 1
- eine Umfangsnut in Querschnittsdarstellung mit einer aus zwei Seitenteilen und einem Sicherungselement bestehenden Schlussbaugruppe,
- FIG 2
- die Schlussbaugruppe gemäß
FIG 1 in einer Draufsicht, - FIG 3
- eine zweite Ausgestaltung der Schlussbaugruppe mit einem die drei Teile der Schlussbaugruppe schräg durchgreifendem Sicherungselement,
- FIG 4
- eine dritte Variante der Erfindung mit einer drei Teile und zwei Sicherungselementen umfassenden Schlussbaugruppe,
- FIG 5
- die Draufsicht gemäß
FIG 4 und - FIG 6
- die Draufsicht gemäß
FIG 4 in einer weiteren Ausführungsvariante.
- FIG. 1
- a circumferential groove in cross-sectional representation with a consisting of two side parts and a fuse element final assembly,
- FIG. 2
- the final assembly according to
FIG. 1 in a plan view, - FIG. 3
- a second embodiment of the final assembly with a the three parts of the final assembly obliquely cross-fuse element,
- FIG. 4
- a third variant of the invention with a closing assembly comprising three parts and two securing elements,
- FIG. 5
- the top view according to
FIG. 4 and - FIG. 6
- the top view according to
FIG. 4 in a further embodiment.
Die endlos umlaufende Umfangsnut 10 ist an einer Außenfläche 11 des Rotors des Verdichters vorgesehen. Die Umfangsnut 10 könnte auch an einem ringförmigen Innengehäuse des Verdichters vorgesehen sein, in der Leitschaufeln befestigt sind. Die Umfangsnut 10 weist in Axialrichtung des Rotors gesehen eine vordere Seitenwand 16 und eine hintere Seitenwand 18 auf, an denen jeweils in Umfangsrichtung verlaufende und sich in axialer Richtung erstreckende Vorsprünge 20, 22 angeordnet sind, die jeweils eine vordere und eine hintere Hinterschneidung 24, 26 bilden (
In die Umfangsnut 10 werden Laufschaufeln 12a, 12b eingesetzt, welche zu den Hinterschneidungen 24, 26 korrespondierend ausgeführte, hammerförmige Schaufelfüße aufweisen. Zur Montage werden die Laufschaufeln 12a, 12b in die Umfangsnut 10 eingesetzt und anschließend so weit, beispielsweise um 45° oder 60° gedreht, bis die hammerförmigen Schaufelfüße die Vorsprünge 20, 22 hintergreifen.In the
Der zwischen der ersten Laufschaufel 12a und der letzten Laufschaufel 12b verbleibende Zwischenraum, der ansonsten vollständig mit Schaufeln 12 eines Schaufelkranzes und ggf. dazwischen angeordneten Zwischenelementen bestückten Umfangsnut muss mittels einer besonderen Vorrichtung, die Schlussbaugruppe 33, Schaufelschloss oder auch Rotor-Schluss genannt wird, verschlossen werden.The remaining between the
Die erste, in
Das vordere Seitenteil 30 ist, wie
Die Schwalbenschwanzführung 46 der Schlussbaugruppe 33 ist so ausgerichtet, dass während des radialen Einschiebens des hinteren Seitenteils 32 in die Umfangsnut 10 dieses mit dem bereits eingesetztem vorderen Seitenteil 30 verhakt wird. Die Schwalbenschwanzführung 46 verhindert eine mögliche Spaltbildung zwischen den beiden Seitenteilen 30, 32.The dovetail guide 46 of the
Das vordere Seitenteil 30 und das hintere Seitenteil 32 liegen in einer Kontaktebene 48 aneinander. In der Kontaktebene 48 ist eine ein Innengewinde 61 aufweisende Bohrung 62 vorgesehen, in der das als Sicherungsschraube 64 ausgebildete Sicherungselement 36 eingeschraubt ist. Das Innengewinde 61 ist hälftig im vorderen Seitenteil 30 und im hinteren Seitenteil 32 angeordnet. Hälftig heißt, dass eine Hälfte jedes Gewindegangs des Innengewindes 61 am vorderen Seitenteil 30 und die andere Hälfte jedes Gewindegangs am hinteren Seitenteil 32 ausgebildet ist.The
Durch das Einschrauben einer beispielsweise als Madenschraube ausgebildeten Sicherungsschraube 64 in das Innengewinde 61 werden die beiden Seitenteile 30, 32 wieder lösbar miteinander verbunden. Die Madenschraube kann im auslaufenden Innengewinde 61 unter Bildung eines besonders hohen Reibschlusses verspannt werden. Durch die von der Schwalbenschwanzführung 46 verhinderte axiale Spaltbildung zwischen beiden Teilen 30, 32 ist die Sicherungsschraube 64 zuverlässig im Innengewinde 61 verschraubt, obwohl dieses von zwei separaten Teilen 30, 32 gebildet ist.By screwing a trained example of a grub screw locking screw 64 into the internal thread 61, the two
Die zusammengesetzte Schlussbaugruppe 33 wird über die Verhakung des vorderen Seitenteils 30 mit dem Vorsprung 20 als Ganzes in der Umfangsnut 10 gehalten und somit gegen Herauslösen aus der Umfangsnut 10 gesichert.The assembled
Das hintere Seitenteil 32 wird trotz einer fehlenden Verhakung mit dem Vorsprung 22 in der Umfangsnut sicher gehalten, da die auf das hintere Seitenteil 32 einwirkenden Fliehkräfte mittels der Sicherungsschraube 64 auf das vordere Seitenteil 30 übertragen werden, so dass das hintere Seitenteil 32 indirekt auch vom Vorsprung 20, welcher als Widerlager für den verhakten inneren Arm 52 dient, getragen wird.The
Obwohl die auf die Sicherungsschraube 64 und auf die beiden Seitenteile 30, 32 einwirkenden Fliehkräfte ein selbsttätiges Lösen der Sicherungsschraube 64 verhindert, kann diese zusätzlich durch eine Anstemmung nochmals gegen Herausdrehen gesichert werden, wodurch eine besonders gegen Herauslösen aus der Umfangsnut 10 gesicherte Schlussbaugruppe 33 angegeben wird.Although the centrifugal forces acting on the locking screw 64 and on the two
Die Teile 130 und 132 liegen in einer Kontaktebene 148 und die Teile 131 und 132 in einer Kontaktebene 149 aneinander. Eine Bohrung 162 erstreckt sich schräg durch die Kontaktebenen 148 und 149. Um die Teile 130, 131 und 132 kraftschlüssig miteinander zu verbinden ist ein stiftartiges Sicherungselement 136 vorgesehen, welches in die Bohrung 162 eingesetzt werden kann. Die Bohrung 162 verläuft entlang einer Achse 140, welche die Kontaktflächen 148, 149 schräg und die drei Teile 130, 132, 131 fluchtend durchdringt. Im inneren der Bohrung 162 ist ein Innengewinde 161 vorgesehen, in welche das als Sicherungsschraube 164 ausgebildete Sicherungselement 136 eingeschraubt werden kann. Dadurch werden die drei Teile, 130, 131, 132, welche jeweils ein Gewindeabschnitt aufweisen, lösbar miteinander verbunden, wodurch das Zwischenstück 132 und auch die Schlussbaugruppe 133 als Ganzes gegen Herauslösen aus der Umfangsnut gesichert sind. Es ist sogar möglich, dass lediglich dass Zwischenteil 132 das Innengewinde 161 aufweist und die Sicherungsschraube 164 sich am Nutgrund der Umfangsnut 10 abstützt, um die Schlussbaugruppe 133 als Ganzes zu sichern. Außerdem kann anstelle einer Abstützung am Nutgrund der Umfangsnut auch eine mit einem Schraubenkopf versehene Sicherungsschraube 164 sich den Seitenteilen 130, 132 und diese miteinander kraftschlüssig verspannen.The
Gleichfalls können die Teile 130, 131 132 der Schlussbaugruppe 133 mit einer Schwalbenschwanzführung gemäß erster Ausgestaltung miteinander verhakt sein.Likewise, the
Alternativ zu der in
Eine dritte Ausgestaltung der Erfindung zeigt
Zwischen den beiden Seitenteilen 230, 231 ist ein Zwischenteil 232 vorgesehen, welches die beiden Seitenteile 230, 231 gegen axiales Verschieben und somit gegen Lösen der Verhakung sichert. Das Zwischenteil 232 weist eine sich in Axialrichtung erstreckende Breite B auf, welche mindestens dem Maß a entspricht, mit welchem jeder Vorsprung 20 bzw. 22 in die Umfangsnut 10 in Axialrichtung hineinragt.
Ist diese Bedingung nicht erfüllt, so kann das als zweites in die Nut einzusetzende Seitenteil 130 bzw. 131 nicht eingesetzt werden.Between the two
If this condition is not fulfilled, the
In den Kontaktflächen 248, 249 ist jeweils in analoger Weise zur ersten Ausgestaltung gemäß
Falls im ungewöhnlichen Fall die Schaufeln 12 des Schaufelkranzes wandern, so dass ein Spalt zwischen der Schlussbaugruppe 33, 133, 233 und einer unmittelbare benachbarten Schaufel 12a bzw. 12b auftritt, könnte sich ggf. die Schlussbaugruppe als Ganzes aus der Umfangsnut 10 durch Drehen lösen. Dies kann verhindert werden, indem die Stege 54, 254 jedes Seitenteil 30, 32, 130, 131, 230, 231 an den Seitenwänden 58 der Vorsprünge 20, 22 flanschartig anliegen, so wie es
Anstelle einer Sicherungsschraube 64, 164, 264 könnte auch ein stiftartiger Bolzen in die Bohrung 62, 162, 262 einsetzt werden, welcher durch eine Presspassung gegen Lösen gesichert ist. Zum Entfernen der Schlussbaugruppe müsste dieser lediglich herausgebohrt werden.Instead of a locking screw 64, 164, 264 could also be a pin-like bolt in the
Weiterhin könnte eine mit einem Schraubenkopf versehene Sicherungsschraube 64, 164, 264 in jede Schlussbaugruppe 33 eingeschraubt werden, wobei der in einem oder mehreren der Teile 30, 32, 130, 131, 132, 230, 231, 232 versenkte Schraubenkopf vorgespannt an diesen kraftschlüssig anliegt.Furthermore, a screw head provided with a locking screw 64, 164, 264 could be screwed into each
Insgesamt kann mit der Schlussbaugruppe eine Vorrichtung zum Schließen des verbleibenden Zwischenraums zwischen der ersten und der letzten, in einer Umfangsnut eingesetzten Schaufeln eines Schaufelkranzes angegeben werden, die sich leicht montieren und demontieren lässt. Da die Montage der Schlussbaugruppe keine.plastische Verformung der Bauteile erfordert, sondern die kraftschlüssige Verbindung der Teile vorschlägt, können diese durch umgekehrt durchgeführte Arbeitsschritte gelöst und demontiert werden. Alle Komponenten der Schlussbaugruppe können wieder verwendet werden. Außerdem ermöglicht die einfache Bauweise einen relativ günstigen Fertigungsaufwand. Overall, with the end assembly, a device for closing the remaining gap between the first and the last inserted in a circumferential groove blades of a blade ring can be specified, which can be easily assemble and disassemble. Since the assembly of the final assembly no.plastic deformation of the components requires, but proposes the non-positive connection of the parts, they can be solved by disassembled steps performed and disassembled. All components of the final assembly can be reused. In addition, the simple design allows a relatively low production cost.
Claims (12)
- Locking sub-assembly (33, 133, 233) for closing the remaining gap (28) between the first and the last blade (12a, 12b) of a blade ring which are inserted in a circumferential groove (10) of a turbomachine, which sub-assembly comprises at least two side pieces (30, 32, 130, 131, 132, 230, 231, 232),
of which at least one is interlockable with a projection (20, 22), which forms an undercut (24, 26), of the circumferential groove (10), and
at least one pin-like locking element (36, 136, 236), which secures the pieces (30, 32, 130, 131, 132, 230, 231, 232) against disengaging from the circumferential groove (10) and which releasably interconnects these,
characterized in that
the two side pieces (30, 32) are interconnected via a dovetail guide (46), or each side piece (130, 131, 230, 231) is interconnected with an intermediate piece (132, 232), which is arranged between them, via a dovetail guide (146, 147, 246, 247) in each case. - Locking sub-assembly (33, 133, 233) according to claim 1,
in which the dovetail guide (46, 146, 147, 246, 247) is arranged on the pieces (30, 32, 130, 131, 132, 230, 231, 232) in such a way that during the radial inserting of the last piece (32, 132, 232) the elements of the dovetail guide (46, 146, 147, 246, 247) intermesh. - Locking sub-assembly (133, 233) according to claim 1 or 2,
which comprises the intermediate piece (132, 232) and a further pin-like locking element (136, 236), wherein each side piece (130, 131, 230, 231) is secured with the intermediate piece (132, 232) by means of one of the two pin-like locking elements (136, 236) in each case. - Locking sub-assembly (33, 133, 233) according to claim 1, 2 or 3,
in which the two abutting side pieces (30, 32) abut in a contact plane (48), or each side piece (130, 131, 230, 231) abuts against the intermediate piece (132, 232) in a contact plane (148, 149, 248, 249), wherein the locking element (36), or the locking elements (136, 236), extends, or extend, longitudinally within the contact plane (48, 148, 149, 248, 249). - Locking sub-assembly (33, 133, 233) according to claim 1, 2 or 3,
in which the two abutting side pieces (30, 32) abut in a contact plane (48), or each side piece (130, 131, 230, 231) abuts against the intermediate piece (132, 232) in a contact plane (148, 149, 248, 249), wherein the locking element (36), or the locking elements (136, 236), extends, or extend, transversely through the contact plane (48, 148, 149, 248, 249). - Locking sub-assembly (33, 133, 233) according to one of the preceding claims,
in which the locking element (36, 136, 236) interconnects the pieces (30, 32, 130, 131, 132, 230, 231, 232) in a non-positive locking manner. - Locking sub-assembly (33, 133, 233) according to one of the preceding claims,
in which the locking element (36, 136, 236) is a locking screw (64, 164, 264). - Locking sub-assembly (33, 133, 233) according to claim 7,
in which the locking screw (64, 164, 264) is formed as a grub screw. - Locking sub-assembly (33, 133, 233) according to one of the preceding claims,
in which each piece (30, 32, 130, 131, 230, 231) can abut against a side wall (58) which is formed by a projection (20, 22), which forms the undercut (24, 26), of the circumferential groove (10). - Locking sub-assembly (33, 133, 233) according to one of the preceding claims,
in which the locking element (36, 136, 236) is secured against loosening. - Turbomachine with a rotor,
which has at least one circumferential groove (10), which has undercuts (24, 26), with rotor blades (12a, 12b) fastened within it,
wherein the remaining gap (28) between the first and the last rotor blade (12a, 12b) which are inserted in the circumferential groove (10) is fully closed by a locking sub-assembly (33, 133, 233) according to one of the preceding claims. - Turbomachine according to claim 11,
which is formed as the turbine of a gas turbine, as a compressor, or as a steam turbine.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL06841633T PL1969206T3 (en) | 2006-01-02 | 2006-12-27 | Closing assembly for closing the gap remaining between the first and last blade of a blade ring that is inserted into the peripheral groove of turbomachinery and corresponding turbomachinery |
EP06841633A EP1969206B1 (en) | 2006-01-02 | 2006-12-27 | Closing assembly for closing the gap remaining between the first and last blade of a blade ring that is inserted into the peripheral groove of turbomachinery and corresponding turbomachinery |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06000025A EP1803900A1 (en) | 2006-01-02 | 2006-01-02 | Closure unit for the remaining space between the first and the last blades of a bladed ring inserted in a circumferencial slot of a turbomachine, and corresponding turbomachine |
EP06841633A EP1969206B1 (en) | 2006-01-02 | 2006-12-27 | Closing assembly for closing the gap remaining between the first and last blade of a blade ring that is inserted into the peripheral groove of turbomachinery and corresponding turbomachinery |
PCT/EP2006/070226 WO2007077183A1 (en) | 2006-01-02 | 2006-12-27 | Closing assembly for closing the gap remaining between the first and last blade of a blade ring that is inserted into the peripheral groove of turbomachinery and corresponding turbomachinery |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1969206A1 EP1969206A1 (en) | 2008-09-17 |
EP1969206B1 true EP1969206B1 (en) | 2009-06-17 |
Family
ID=36123801
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06000025A Withdrawn EP1803900A1 (en) | 2006-01-02 | 2006-01-02 | Closure unit for the remaining space between the first and the last blades of a bladed ring inserted in a circumferencial slot of a turbomachine, and corresponding turbomachine |
EP06841633A Not-in-force EP1969206B1 (en) | 2006-01-02 | 2006-12-27 | Closing assembly for closing the gap remaining between the first and last blade of a blade ring that is inserted into the peripheral groove of turbomachinery and corresponding turbomachinery |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06000025A Withdrawn EP1803900A1 (en) | 2006-01-02 | 2006-01-02 | Closure unit for the remaining space between the first and the last blades of a bladed ring inserted in a circumferencial slot of a turbomachine, and corresponding turbomachine |
Country Status (9)
Country | Link |
---|---|
US (1) | US8157530B2 (en) |
EP (2) | EP1803900A1 (en) |
JP (1) | JP4926186B2 (en) |
CN (1) | CN101351620B (en) |
AT (1) | ATE434115T1 (en) |
DE (1) | DE502006004038D1 (en) |
PL (1) | PL1969206T3 (en) |
RU (1) | RU2392445C2 (en) |
WO (1) | WO2007077183A1 (en) |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8500394B2 (en) * | 2008-02-20 | 2013-08-06 | United Technologies Corporation | Single channel inner diameter shroud with lightweight inner core |
US8251667B2 (en) * | 2009-05-20 | 2012-08-28 | General Electric Company | Low stress circumferential dovetail attachment for rotor blades |
US8523529B2 (en) * | 2009-11-11 | 2013-09-03 | General Electric Company | Locking spacer assembly for a circumferential entry airfoil attachment system |
US20110255978A1 (en) * | 2010-04-16 | 2011-10-20 | Brian Denver Potter | Locking Assembly For Circumferential Attachments |
CH703997A1 (en) | 2010-10-27 | 2012-04-30 | Alstom Technology Ltd | Blade assembly, in particular vane. |
US8875870B2 (en) | 2011-03-31 | 2014-11-04 | Benetech, Inc. | Conveyor belt cleaner scraper blade and assembly |
EP2562356A1 (en) * | 2011-08-24 | 2013-02-27 | Siemens Aktiengesellschaft | Blade assembly |
US8979484B2 (en) | 2012-01-05 | 2015-03-17 | Pratt & Whitney Canada Corp. | Casing for an aircraft turbofan bypass engine |
EP2719866B1 (en) * | 2012-10-12 | 2018-12-05 | Safran Aero Boosters SA | Rotor disk of a turbomachine comprising a lock for blades |
US9518471B2 (en) | 2013-10-16 | 2016-12-13 | General Electric Company | Locking spacer assembly |
US9416670B2 (en) * | 2013-10-16 | 2016-08-16 | General Electric Company | Locking spacer assembly |
US9464531B2 (en) | 2013-10-16 | 2016-10-11 | General Electric Company | Locking spacer assembly |
US9512732B2 (en) * | 2013-10-16 | 2016-12-06 | General Electric Company | Locking spacer assembly inserted between rotor blades |
US9341071B2 (en) | 2013-10-16 | 2016-05-17 | General Electric Company | Locking spacer assembly |
EP3054098A1 (en) * | 2015-02-05 | 2016-08-10 | Siemens Aktiengesellschaft | Closure assembly for closing a blade ring on a blade holder of a turbo engine |
KR101884712B1 (en) * | 2016-12-21 | 2018-08-03 | 두산중공업 주식회사 | Locking spacer for rotor blade |
KR101920070B1 (en) * | 2016-12-23 | 2018-11-19 | 두산중공업 주식회사 | Locking spacer for rotor blade |
US10465699B2 (en) * | 2017-01-26 | 2019-11-05 | DOOSAN Heavy Industries Construction Co., LTD | Compressor blade locking mechanism in disk with tangential groove |
US10519970B2 (en) * | 2017-02-09 | 2019-12-31 | DOOSAN Heavy Industries Construction Co., LTD | Compressor blade locking mechanism in disk with tangential groove |
WO2019190494A1 (en) * | 2018-03-28 | 2019-10-03 | Siemens Aktiengesellschaft | Locking spacer assembly, corresponding blade assembly, method for installing a locking spacer |
CN112780351A (en) * | 2019-11-07 | 2021-05-11 | 中国航发商用航空发动机有限责任公司 | Aeroengine rotor and aeroengine |
KR102355521B1 (en) | 2020-08-19 | 2022-01-24 | 두산중공업 주식회사 | Assembling structure of compressor blade and gas turbine comprising the same and assembling method of compressor blade |
CN112797025B (en) * | 2021-04-12 | 2021-08-31 | 中国联合重型燃气轮机技术有限公司 | Blade root locking device, rotating device, compressor and gas turbine |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2421855A (en) * | 1943-07-23 | 1947-06-10 | United Aircraft Corp | Turbine blade locking device |
BE490366A (en) * | 1948-09-17 | |||
GB639320A (en) * | 1948-10-22 | 1950-06-28 | Frank Rosslyn Harris | Improvements in or relating to the mounting of turbine, compressor or like blades |
US2857134A (en) * | 1954-03-17 | 1958-10-21 | Parsons C A & Co Ltd | Assembly of blades for turbines and the like |
US3721506A (en) * | 1971-05-25 | 1973-03-20 | Gen Electric | Split-nut blade locking assembly |
IL57560A0 (en) * | 1978-08-29 | 1979-10-31 | Gen Electric | A split-nut locking assembly for securing blades to a rotor disc,particularly of a compressor |
JP2815670B2 (en) * | 1990-04-25 | 1998-10-27 | 株式会社小糸製作所 | Automotive headlamp |
US5639191A (en) * | 1996-09-04 | 1997-06-17 | Womack; Robert C. | Short coupled hydraulic lead screw tapping apparatus |
DE10134611A1 (en) | 2000-12-16 | 2002-06-27 | Alstom Switzerland Ltd | Fixing device for a blade mounting of a compressor or turbine stage of a gas turbine system comprises a blade having a counter-contour corresponding to a connecting element of a wedge element to produce a form-locking connection |
DE10310431A1 (en) * | 2003-03-11 | 2004-09-23 | Alstom Technology Ltd | Rotor end |
DE10310432A1 (en) | 2003-03-11 | 2004-09-23 | Alstom Technology Ltd | Rotor end |
US7435055B2 (en) * | 2005-03-29 | 2008-10-14 | Siemens Power Generation, Inc. | Locking spacer assembly for a turbine engine |
-
2006
- 2006-01-02 EP EP06000025A patent/EP1803900A1/en not_active Withdrawn
- 2006-12-27 CN CN2006800502001A patent/CN101351620B/en not_active Expired - Fee Related
- 2006-12-27 AT AT06841633T patent/ATE434115T1/en not_active IP Right Cessation
- 2006-12-27 WO PCT/EP2006/070226 patent/WO2007077183A1/en active Application Filing
- 2006-12-27 DE DE502006004038T patent/DE502006004038D1/en active Active
- 2006-12-27 RU RU2008131932/06A patent/RU2392445C2/en not_active IP Right Cessation
- 2006-12-27 PL PL06841633T patent/PL1969206T3/en unknown
- 2006-12-27 US US12/087,316 patent/US8157530B2/en not_active Expired - Fee Related
- 2006-12-27 EP EP06841633A patent/EP1969206B1/en not_active Not-in-force
- 2006-12-27 JP JP2008547962A patent/JP4926186B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JP2009522483A (en) | 2009-06-11 |
CN101351620A (en) | 2009-01-21 |
US20090016889A1 (en) | 2009-01-15 |
EP1803900A1 (en) | 2007-07-04 |
PL1969206T3 (en) | 2009-11-30 |
CN101351620B (en) | 2012-06-13 |
DE502006004038D1 (en) | 2009-07-30 |
RU2008131932A (en) | 2010-02-10 |
WO2007077183A1 (en) | 2007-07-12 |
RU2392445C2 (en) | 2010-06-20 |
JP4926186B2 (en) | 2012-05-09 |
ATE434115T1 (en) | 2009-07-15 |
EP1969206A1 (en) | 2008-09-17 |
US8157530B2 (en) | 2012-04-17 |
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