EP1703078B1 - Caulking device and method of caulking the locking tabs in a compressor or turbine - Google Patents

Caulking device and method of caulking the locking tabs in a compressor or turbine Download PDF

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Publication number
EP1703078B1
EP1703078B1 EP05005872A EP05005872A EP1703078B1 EP 1703078 B1 EP1703078 B1 EP 1703078B1 EP 05005872 A EP05005872 A EP 05005872A EP 05005872 A EP05005872 A EP 05005872A EP 1703078 B1 EP1703078 B1 EP 1703078B1
Authority
EP
European Patent Office
Prior art keywords
bending device
bending
punch
compressor
intermediate space
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
Application number
EP05005872A
Other languages
German (de)
French (fr)
Other versions
EP1703078A1 (en
Inventor
David Miosga
Peter Schröder
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to DE502005000782T priority Critical patent/DE502005000782D1/en
Priority to ES05005872T priority patent/ES2285594T3/en
Priority to PL05005872T priority patent/PL1703078T3/en
Priority to AT05005872T priority patent/ATE363585T1/en
Priority to EP05005872A priority patent/EP1703078B1/en
Application filed by Siemens AG filed Critical Siemens AG
Priority to CNB2006100086332A priority patent/CN100443209C/en
Priority to US11/385,048 priority patent/US7415763B2/en
Publication of EP1703078A1 publication Critical patent/EP1703078A1/en
Application granted granted Critical
Publication of EP1703078B1 publication Critical patent/EP1703078B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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
    • F05D2230/00—Manufacture
    • F05D2230/60—Assembly methods
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49316—Impeller making
    • Y10T29/4932—Turbomachine making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49316—Impeller making
    • Y10T29/4932—Turbomachine making
    • Y10T29/49321—Assembling individual fluid flow interacting members, e.g., blades, vanes, buckets, on rotary support member
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49815—Disassembling

Definitions

  • the invention relates to a bending device positionable for bending a sheet in a gap between two blade rings arranged along an axis of a compressor or turbine with blades extending along a radius. Furthermore, the invention relates to a method for bending a sheet in the intermediate space.
  • a turbine or a compressor formed between a housing and an impeller or rotor flow channel with a flow of working fluid is applied.
  • the flow channel extends along an axis of the compressor or turbine.
  • In the flow channel extend along a radius blades, which are flowed through by the working medium.
  • These may be casings attached to the housing or blades attached to the impeller or rotor.
  • the vanes serve to influence the flow of the working medium.
  • the blades are flowed by the flow of the working medium.
  • the blades are rotated by the impeller in rotational motion and compress in this way the flow of the working fluid.
  • the flowing working fluid releases its kinetic energy to the blades, which in this way cause the rotor to rotate.
  • the rotational movement of the rotor can be used, for example, to drive a generator and above to generate electricity.
  • a number of vanes typically form a vane ring in which the number of vanes are secured annularly juxtaposed along the circumference of the flow duct to the housing in the case of vanes or on the rotor or impeller in the case of blades.
  • One depending on the application appropriate number of such blade rings is arranged in steps along the axis of a compressor or a turbine in a row.
  • the design and alignment of a blade of a blade ring varies from stage to stage in accordance with the pressure and temperature conditions of the flow of the working medium along the flow channel. Between a first and a second blade ring arranged along the axis, there is a gap in which the medium flows freely.
  • a shovel In the space a shovel is fixed with its foot on the impeller or housing.
  • the attachment can be secured by bending a metal sheet in the intermediate space, for example into a gap formed on the housing or impeller or rotor.
  • a compressor For assembly or disassembly during production or revision of a compressor such a locking plate is previously bent manually.
  • a bending tool in the form of a rod or a suitable lever is positioned in a space between two blade rings arranged along an axis of a compressor with blades extending along a radius on the sheet to be bent. By striking a hammer on the bending tool, the sheet is then bent manually.
  • This bending process must be performed individually for each locking plate.
  • the manual activity no defined and reproducible bending in a series of sheets can be guaranteed.
  • the manual operation leads to a relatively high installation time.
  • the leverage forces to be executed are in some cases so great that when the lever slips off there is a comparatively high risk of injury to the installer and / or a blade of the compressor can be damaged.
  • the impeller or provided for receiving the blades wheel disc can be damaged.
  • cracks can be initiated in the metal sheet due to undefined, manual bending which may affect its life and safety.
  • the situation is similar in a bending operation of a sheet in a gap in a turbine.
  • a stationary device is known from US Pat. No. 3,440,706, by means of which compressor rotor blades can be fastened to a rotor disk.
  • the blades are arranged on the rotor disk and fastened by means of a then protruding sheet metal strip.
  • a plurality of hydraulic punches are present on the device. These hydraulic rams are extended one after the other and retracted to gradually bend over the sheet metal strip until it rests against the rotor disk on the front side.
  • the invention is directed to providing an apparatus and method for bending a sheet in a space between two blade rings arranged along an axis of a compressor or a turbine with blades extending along a radius which simultaneously perform the bending operation more effective and reliable than a manual bending process.
  • the object is achieved by the bending device mentioned above, which according to the invention comprises a fixing element for the bending device, a hydraulic system and an actuatable by the hydraulic punch, which is executable in the direction of the radius.
  • the invention is based on the consideration that, in departure from a manual bending process, a comparatively automated bending process can perform, on the one hand, more effectively and, on the other hand, more reliably the bending of a metal sheet.
  • the invention has recognized that it is possible to provide a bending device which is fixable in the intermediate space and can bend a sheet to be bent in a defined manner effectively and reliably via a hydraulically actuable punch.
  • the hydraulics can namely be operated largely automatically, without a fitter would have to perform manually with an attached lever bending the sheet. Rather, it is up to the installer now to fix the bending device in the space and to set the hydraulics in motion.
  • the method according to the new concept leads to a time saving when bending a sheet, so that in particular in the case of a compressor, the possibility of a comparatively rapid exchange of a blade ring is given. In this way the revision time and thus the necessary costs are reduced. Since a fitter no longer has to carry out the bending process independently with considerable expenditure of force, a danger of injury to the fitter and a risk of damaging a blade are virtually ruled out. Rather, an installer adjusts and fixes the hydraulic bending device and then activates the hydraulics. The installer can observe the bending process and possibly influence the bending process under control of the hydraulic and hydraulic power.
  • the bending device is expediently formed in the form of a mobile, portable bending device.
  • the bending device can be handled easily and, for example, along the axis of a compressor in each successive spaces each properly positioned and fixed.
  • the fixing element is designed for fixing the bending device in the respective intermediate space along the axis.
  • This has the advantage that the bending device can be properly fixed with varying dimensions of the intermediate space, for example with a varying dimension between a first and a second blade ring, ie even in the case of a variable environment.
  • a fixing element in the form of a clamping element that allows clamping of the bending device in the intermediate space along the axis is particularly advantageous.
  • the fixing element is adaptable to different spaces between the blade rings.
  • the hydraulic system of the bending device preferably has a pump, a guide for hydraulic fluid, for example an inlet and outlet, and a cylinder for actuating the punch.
  • the hydraulic pump is replaceable.
  • the bending device in particular has a variable connection, via which a pump can be connected. This can be, for example, any automatic pump, eg a pump that is often present for an embossing device, or a manually operated hand pump. This has the advantage that the bending device can be operated with existing pumps.
  • the punch of the bending device is replaceable.
  • This increases the variability of the bending device and makes the bending device adaptable, for example, to a respective plate of a compressor wheel.
  • the bending device can thus be used for a variety of spaces with variable dimensions. Despite different dimensions of the spaces along an axis of a compressor or a turbine thus one and the same bending device for bending a sheet can be used in a space, namely by, for example, the fixing element for clamping the bending device is variably adjustable and on the other hand a stamp of the bending device is replaceable, in particular by a stamp of other dimensions is replaceable.
  • the punch is extendable in the direction of the radius.
  • the ram in the case of a bending device fixed along the axis of a compressor or a turbine, the ram can therefore be extended perpendicularly to the fixing direction of the bending device, namely in the direction of the radius. It has been found that a bending device arranged in this way relative to a turbine or a compressor can be adjusted and fixed in a particularly simple and reliable manner and can execute the bending operation reliably.
  • the bending device is fixed in the space along the axis and the punch in the direction of the radius moved toward the sheet to be bent. Conveniently, the sheet is folded into a groove of the impeller.
  • FIG. 1 shows an impeller 1 of a compressor (not shown) with a number of blade rings 5 arranged along an axis 3 of the compressor.
  • a blade ring 5 has a number of blades 9 extending along a radius 7, of which in each case one blade 9 in FIG Section is shown.
  • a blade 9 of the compressor is held with its foot 11, similar to a tongue and groove connection to a respective segment 13 of the compressor wheel 1.
  • the groove for receiving the foot 11 is in each case designed as an axial groove.
  • the orientation and design of such grooves is exemplified in FIG 2, wherein the arrow 12 indicates the direction of the turbine axis 3.
  • the foot 11 is inserted together with an underlying plate 47 in the groove of the segment 13.
  • sheet 47 is provided with a bead 14 running circumferentially (i.e., transverse to axis 3) which engages a corresponding recess on the underside of foot 11.
  • the length of the sheet 47 is dimensioned such that it projects beyond the impeller 1 or the so-called wheel disc head immediately after insertion into the groove of the segment 13 on both sides (that is, in the axial direction). This is shown in FIG. 3A.
  • the arrangement of the plate 47 which acts as a safety plate in this manner after bending (that is to say in the operating state of the compressor) is shown in FIG. After bending into the respectively provided for receiving groove 43, the tabs of the plate 47 are flush with the wheel disc head.
  • the position of the locking plates 47 in relation to the turbine blades 9 and the Radusionnkopf can also be illustrated by the reproduced in Figure 4 view, in which the viewing direction in the radial direction (from the blade tips to the turbine shaft) is selected.
  • a plate 47 is shown before bending and a plate 47 after bending.
  • the respective receiving groove and thus also the plate 47 are slightly inclined in this example against the direction of the axis 3.
  • a bending device 17 is fixed.
  • the bending device 17 is positioned in the intermediate space 15 and clamped by a fixing element 19 in the form of a clamping element in the intermediate space 15 between two stops 21 of adjacent segments 13 of the compressor wheel 1.
  • the fixing element 19 can be widened via a screw 23 or alternatively via a hydraulic cylinder.
  • the fixing member 23 is mounted either releasably adjacent to the bending device in the space 15 and by actuation of the screw 23 or hydraulic Widened way.
  • the fixing element can also be attached directly to the bending device and already positioned with the bending device in the intermediate space 15. In this way, the bending device 17 together with the fixing element 19 have different axial widths, which is also adaptable to a gap 15 'or 15 ", wherein the intermediate spaces 15, 15' and 15" have different dimensions.
  • a bending device 17 fixed in this way also has a hydraulic system 25.
  • the hydraulic system comprises a pump 27, a feed 29 and an outlet 31 for a hydraulic fluid and a hydraulic cylinder 33.
  • the hydraulic cylinder 33 serves to actuate a punch 35.
  • the punch can, depending on the selected inflow 37 or outflow 39 in a corresponding movement 41 along a radius 7 off or retracted.
  • the punch 35 of the bending device 17 is hydraulically actuated, wherein the punch 35 is moved along the radius 7 on the sheet 47 to be bent. In this way, the sheet to be bent 47 is folded under the action of the punch 35.
  • the stopper 45 acts as a edge strip for the sheet 47 to be bent.
  • the movement of the punch is effected by a hydraulic piston 49, which extends from the pump 27 at supply 37 of hydraulic fluid.
  • the punch 35 is replaceable, so that it is adapted to the respective to be mounted plate 47, which is designed as a locking plate.
  • a different punch can thus be used to bend a securing plate.
  • a punch moves radially on the sheet 47 to be bent during extension of the piston 49 and edges it on the stop 45 acting as a border around.
  • an existing hydraulic pump for example a hydraulic pump for a mobile embossing device, can also be used.
  • the provided for the drive of the hydraulic cylinder 33 with the punch 35 pump 27 can also be used to actuate the fixing element 19, if this is carried out hydraulically.
  • each one or the other functional unit can be controlled by mounted in the system of hydraulic lines directional control valves.
  • the bending device 17 is provided according to the embodiment shown in FIG 1 with a sealing tip protection 51.
  • the sealing tip protection 51 as a polymeric or made of a soft metal pad, which is interchangeable attached to the bending device 37, executed.
  • a method for bending a sheet 47 in the gap 15, 15 ', 15 "provides that a bending device 17 is positioned in the gap 15, 15', 15", the bending device 17 in the gap 15, 15 ', 15 is fixed, for bending the sheet 47, a punch 35 of the bending device 17 is hydraulically actuated, wherein the punch 35 is moved to the sheet 47 to be bent and the sheet 47 is bent under the action of the punch 35.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

The bending device (17) includes a fixing element (14), a hydraulic system (25), and a punch (35) operated by the hydraulic system. The bending device is positioned in an intermediate cavity (15, 15', 15"). The bending device is then fixed their, and the sheet (47) is bent by the hydraulically-operated bending device.

Description

Die Erfindung betrifft eine Biegevorrichtung, die zum Biegen eines Blechs in einem Zwischenraum zwischen zwei entlang einer Achse eines Verdichters oder einer Turbine angeordneten Schaufelringen mit sich entlang einem Radius erstreckenden Schaufeln positionierbar ist. Weiter betrifft die Erfindung ein Verfahren zum Biegen eines Bleches in dem Zwischenraum.The invention relates to a bending device positionable for bending a sheet in a gap between two blade rings arranged along an axis of a compressor or turbine with blades extending along a radius. Furthermore, the invention relates to a method for bending a sheet in the intermediate space.

Bei einer Turbine oder einem Verdichter wird ein zwischen einem Gehäuse und einem Laufrad oder Rotor gebildeter Strömungskanal mit einer Strömung von Arbeitsmedium beaufschlagt. Der Strömungskanal erstreckt sich dabei entlang einer Achse des Verdichters oder Turbine. In den Strömungskanal erstrecken sich entlang einem Radius Schaufeln, die vom Arbeitsmedium angeströmt werden. Dies können am Gehäuse befestigte Leitschaufeln oder am Laufrad oder Rotor befestigte Laufschaufeln sein. Die Leitschaufeln dienen der Strömungsbeeinflussung des Arbeitsmediums. Die Laufschaufeln werden von der Strömung des Arbeitsmediums angeströmt.In a turbine or a compressor formed between a housing and an impeller or rotor flow channel with a flow of working fluid is applied. The flow channel extends along an axis of the compressor or turbine. In the flow channel extend along a radius blades, which are flowed through by the working medium. These may be casings attached to the housing or blades attached to the impeller or rotor. The vanes serve to influence the flow of the working medium. The blades are flowed by the flow of the working medium.

Im Falle eines Verdichters werden die Laufschaufeln durch das Laufrad in Drehbewegung versetzt und verdichten auf diese Weise die Strömung des Arbeitsmediums.In the case of a compressor, the blades are rotated by the impeller in rotational motion and compress in this way the flow of the working fluid.

Im Falle einer Turbine gibt das strömende Arbeitsmedium seine kinetische Energie an die Laufschaufeln ab, welche auf diese Weise den Rotor in eine Drehbewegung versetzen. Die Drehbewegung des Rotors kann beispielsweise zum Antrieb eines Generators und darüber zur Erzeugung von Strom genutzt werden.In the case of a turbine, the flowing working fluid releases its kinetic energy to the blades, which in this way cause the rotor to rotate. The rotational movement of the rotor can be used, for example, to drive a generator and above to generate electricity.

Eine Anzahl von Schaufeln bildet üblicherweise einen Schaufelring, bei dem die Anzahl von Schaufeln ringförmig nebeneinander gestellt entlang dem Umfang des Strömungskanals am Gehäuse im Falle von Leitschaufeln oder am Rotor oder Laufrad im Falle von Laufschaufeln befestigt sind. Eine je nach Anwendung zweckmäßige Anzahl von solchen Schaufelringen ist stufenartig entlang der Achse eines Verdichters oder einer Turbine hintereinander angeordnet. Dabei variiert zweckmäßigerweise die Ausbildung und Ausrichtung einer Schaufel eines Schaufelrings von Stufe zu Stufe entsprechend den Druck- und Temperaturverhältnissen der Strömung des Arbeitsmediums entlang dem Strömungskanal. Zwischen einem ersten und einem zweiten entlang der Achse angeordneten Schaufelring gibt es einen Zwischenraum, in dem das Medium frei strömt.A number of vanes typically form a vane ring in which the number of vanes are secured annularly juxtaposed along the circumference of the flow duct to the housing in the case of vanes or on the rotor or impeller in the case of blades. One depending on the application appropriate number of such blade rings is arranged in steps along the axis of a compressor or a turbine in a row. Expediently, the design and alignment of a blade of a blade ring varies from stage to stage in accordance with the pressure and temperature conditions of the flow of the working medium along the flow channel. Between a first and a second blade ring arranged along the axis, there is a gap in which the medium flows freely.

Im Zwischenraum wird eine Schaufel mit ihrem Fuß am Laufrad oder Gehäuse befestigt. Die Befestigung kann dadurch gesichert werden, dass ein Blech im Zwischenraum, beispielsweise in einen am Gehäuse oder Laufrad oder Rotor ausgeführten Spalt umgebogen wird. Dies ist insbesondere bei einem Verdichter der Fall. Zur Montage oder Demontage bei Herstellung oder Revision eines Verdichters wird bislang ein solches Sicherungsblech manuell umgebogen. Dazu wird ein Biegewerkzeug in Form einer Stange oder eines geeigneten Hebels in einem Zwischenraum zwischen zwei entlang einer Achse eines Verdichters angeordneten Schaufelringen mit sich entlang einem Radius erstreckenden Schaufeln an dem zu biegenden Blech positioniert. Durch Aufschlagen eines Hammers auf das Biegewerkzeug wird das Blech dann manuell umgebogen.In the space a shovel is fixed with its foot on the impeller or housing. The attachment can be secured by bending a metal sheet in the intermediate space, for example into a gap formed on the housing or impeller or rotor. This is the case in particular with a compressor. For assembly or disassembly during production or revision of a compressor such a locking plate is previously bent manually. For this purpose, a bending tool in the form of a rod or a suitable lever is positioned in a space between two blade rings arranged along an axis of a compressor with blades extending along a radius on the sheet to be bent. By striking a hammer on the bending tool, the sheet is then bent manually.

Dieser Biegevorgang muss für jedes Sicherungsblech einzeln durchgeführt werden. Naturgemäß kann aufgrund der manuellen Tätigkeit kein definiertes und reproduzierbares Umbiegen bei einer Serie von Blechen gewährleistet werden. Hinzu kommt, dass die manuelle Tätigkeit zu einer vergleichsweise hohen Montagezeit führt. Die auszuführenden Hebelkräfte sind zum Teil so groß, dass bei einem Abrutschen des Hebels eine vergleichsweise hohe Verletzungsgefahr des Monteurs besteht und/oder eine Schaufel des Verdichters beschädigt werden kann. Auch das Laufrad bzw. die zur Aufnahme der Schaufeln vorgesehene Radscheibe kann beschädigt werden. Zudem können im Blech durch undefiniertes, manuelles Umbiegen Risse initiiert werden, die unter Umständen seine Lebensdauer und seine sichernde Funktion beeinträchtigen.This bending process must be performed individually for each locking plate. Naturally, due to the manual activity, no defined and reproducible bending in a series of sheets can be guaranteed. In addition, the manual operation leads to a relatively high installation time. The leverage forces to be executed are in some cases so great that when the lever slips off there is a comparatively high risk of injury to the installer and / or a blade of the compressor can be damaged. Also, the impeller or provided for receiving the blades wheel disc can be damaged. In addition, cracks can be initiated in the metal sheet due to undefined, manual bending which may affect its life and safety.

Ähnlich ist die Situation bei einem Biegevorgang eines Bleches in einem Zwischenraum bei einer Turbine.The situation is similar in a bending operation of a sheet in a gap in a turbine.

Wünschenswert wäre es, diese Nachteile zu vermeiden und den Biegevorgang zu verbessern.It would be desirable to avoid these disadvantages and to improve the bending process.

Aus der US 3,440,706 ist hierzu eine stationäre Vorrichtung bekannt, durch die Verdichterlaufschaufeln an einer Rotorscheibe befestigt werden können. Die Laufschaufeln werden dazu an der Rotorscheibe angeordnet und mittels eines dann überstehenden Blechstreifens befestigt. Um den aus der Rotorscheibe herausstehenden Blechstreifen umzubiegen, sind mehrere Hydraulikstempel an der Vorrichtung vorhanden. Diese Hydraulikstempel werden nacheinander ausgefahren und eingefahren, um den Blechstreifen schrittweise umzubiegen, bis dieser stirnseitig an der Rotorscheibe anliegt.For this purpose, a stationary device is known from US Pat. No. 3,440,706, by means of which compressor rotor blades can be fastened to a rotor disk. The blades are arranged on the rotor disk and fastened by means of a then protruding sheet metal strip. In order to bend over the sheet metal strip projecting out of the rotor disk, a plurality of hydraulic punches are present on the device. These hydraulic rams are extended one after the other and retracted to gradually bend over the sheet metal strip until it rests against the rotor disk on the front side.

Außerdem ist aus der US 4,455,730 eine hydraulische Vorrichtung zum Entfernen von axial in Rotorscheiben eingeschobenen Laufschaufeln bekannt. Über einen Ausrückarm kann eine so große axialgerichtete Kraft auf einen Schaufelfuß der Laufschaufel aufgebracht werden, dass der zur Axialsicherung im Schaufelfuß und im Nutgrund der Haltenut sitzende Arretierungsstift abgeschert wird.In addition, from US 4,455,730 a hydraulic device for removing axially inserted into rotor disks blades is known. About a disengagement, such a large axially directed force can be applied to a blade root of the blade, that the seated for axial securing in the blade root and the groove bottom of the retaining locking pin is sheared off.

An dieser Stelle setzt die Erfindung an, deren Aufgabe es ist, eine Vorrichtung und ein Verfahren zum Biegen eines Bleches in einem Zwischenraum zwischen zwei entlang einer Achse eines Verdichters oder einer Turbine angeordneten Schaufelringen mit sich entlang einem Radius erstreckenden Schaufeln anzugeben, welche den Biegevorgang gleichzeitig effektiver als auch verlässlicher als bei einem manuellen Biegevorgang gestalten.At this point, the invention is directed to providing an apparatus and method for bending a sheet in a space between two blade rings arranged along an axis of a compressor or a turbine with blades extending along a radius which simultaneously perform the bending operation more effective and reliable than a manual bending process.

Betreffend die Vorrichtung wird die Aufgabe durch die eingangs genannte Biegevorrichtung gelöst, die erfindungsgemäß ein Fixierelement für die Biegevorrichtung, eine Hydraulik und einen durch die Hydraulik betätigbaren Stempel aufweist, welcher in Richtung des Radius ausführbar ist.Regarding the device, the object is achieved by the bending device mentioned above, which according to the invention comprises a fixing element for the bending device, a hydraulic system and an actuatable by the hydraulic punch, which is executable in the direction of the radius.

Betreffend das Verfahren wird die Aufgabe durch die Erfindung mit einem eingangs genannten Verfahren zum Biegen eines Bleches in einem Zwischenraum zwischen zwei entlang einer Achse eines Verdichters oder einer Turbine angeordneten Schaufelringen und sich entlang einem Radius erstreckenden Schaufeln gelöst, wobei

  • eine Biegevorrichtung in dem Zwischenraum positioniert wird.
Regarding the method, the object is achieved by the invention with a method mentioned above for bending a sheet in a gap between two blade rings arranged along an axis of a compressor or a turbine and blades extending along a radius, wherein
  • a bending device is positioned in the gap.

Erfindungsgemäß ist dabei vorgesehen, dass

  • die Biegevorrichtung im Zwischenraum fixiert wird,
  • zum Biegen des Bleches ein Stempel der Biegevorrichtung hydraulisch betätigt wird, wobei
  • der Stempel auf das zu biegende Blech zubewegt wird und
  • das Blech unter Einwirkung des Stempels gebogen wird.
According to the invention, it is provided that
  • the bending device is fixed in the intermediate space,
  • for bending the sheet, a punch of the bending device is hydraulically actuated, wherein
  • the stamp is moved to the sheet to be bent and
  • the sheet is bent under the action of the punch.

Die Erfindung geht dabei von der Überlegung aus, dass in Abkehr von einem manuellen Biegevorgang ein vergleichsweise automatisierter Biegevorgang zum einen effektiver und zum anderen auch verlässlicher das Biegen eines Bleches durchführen kann. Dabei hat die Erfindung erkannt, dass es möglich ist, eine Biegevorrichtung anzugeben, die in dem Zwischenraum fixierbar ist und über einen hydraulisch betätigbaren Stempel ein zu biegendes Blech in definierter Weise effektiv und zuverlässig biegen kann.The invention is based on the consideration that, in departure from a manual bending process, a comparatively automated bending process can perform, on the one hand, more effectively and, on the other hand, more reliably the bending of a metal sheet. In this case, the invention has recognized that it is possible to provide a bending device which is fixable in the intermediate space and can bend a sheet to be bent in a defined manner effectively and reliably via a hydraulically actuable punch.

Die Hydraulik kann nämlich weitestgehend automatisch betätigt werden, ohne dass ein Monteur manuell mit einem angesetzten Hebel das Biegen des Bleches durchführen müsste. Vielmehr obliegt es dem Monteur nunmehr, die Biegevorrichtung im Zwischenraum zu fixieren und die Hydraulik in Gang zu setzen.The hydraulics can namely be operated largely automatically, without a fitter would have to perform manually with an attached lever bending the sheet. Rather, it is up to the installer now to fix the bending device in the space and to set the hydraulics in motion.

Auf diese Weise wird ein definiertes und reproduzierbares und damit gleichmäßiges Umbiegen eines Bleches, insbesondere eines Sicherungsbleches, erreicht. Denn es werden Stoßkräfte wie bei einer manuellen Biegung vermieden. Eine durch die Stoßkräfte verursachte Rissbildungsgefahr ist somit gemäß dem neuen Konzept ausgeschlossen.In this way, a defined and reproducible and thus uniform bending of a sheet, in particular a lock plate is achieved. Because impact forces are avoided as in a manual bend. A risk of cracking caused by the impact forces is therefore excluded according to the new concept.

Das Verfahren gemäß dem neuen Konzept führt zu einer Zeitersparnis beim Biegen eines Bleches, sodass insbesondere im Falle eines Verdichters die Möglichkeit eines vergleichsweise zügigen Tausches eines Schaufelringes gegeben ist. Auf diese Weise wird die Revisionszeit und damit die dafür notwendigen Kosten reduziert. Da ein Monteur den Biegevorgang nicht mehr selbstständig unter erheblicher Kraftaufwendung durchführen muss, ist eine Verletzungsgefahr des Monteurs und eine Beschädigungsgefahr für eine Schaufel praktisch ausgeschlossen. Vielmehr justiert und fixiert ein Monteur die hydraulische Biegevorrichtung und aktiviert dann die Hydraulik. Der Monteur kann den Biegevorgang beobachten und ggf. unter Steuerung der Hydraulik und Hydraulikkraft den Biegevorgang beeinflussen.The method according to the new concept leads to a time saving when bending a sheet, so that in particular in the case of a compressor, the possibility of a comparatively rapid exchange of a blade ring is given. In this way the revision time and thus the necessary costs are reduced. Since a fitter no longer has to carry out the bending process independently with considerable expenditure of force, a danger of injury to the fitter and a risk of damaging a blade are virtually ruled out. Rather, an installer adjusts and fixes the hydraulic bending device and then activates the hydraulics. The installer can observe the bending process and possibly influence the bending process under control of the hydraulic and hydraulic power.

Vorteilhafte Weiterbildungen der Erfindung sind den Unteransprüchen zu entnehmen und geben im Einzelnen vorteilhafte Möglichkeiten an, das oben erläuterte Konzept im Rahmen der Aufgabenstellung sowie hinsichtlich weiterer Vorteile zu realisieren.Advantageous developments of the invention can be found in the dependent claims and specify in particular advantageous ways to realize the above-described concept within the scope of the problem and with regard to further advantages.

Die Biegevorrichtung ist zweckmäßigerweise in Form einer mobil einsetzbaren, tragbaren Biegevorrichtung gebildet. Auf diese Weise kann die Biegevorrichtung einfach gehandhabt werden und beispielsweise entlang der Achse eines Verdichters in hintereinander folgende Zwischenräume jeweils sachgerecht positioniert und fixiert werden.The bending device is expediently formed in the form of a mobile, portable bending device. In this way, the bending device can be handled easily and, for example, along the axis of a compressor in each successive spaces each properly positioned and fixed.

Vorzugsweise ist das Fixierelement zum Fixieren der Biegevorrichtung im jeweiligen Zwischenraum entlang der Achse ausgelegt. Dies hat den Vorteil, dass die Biegevorrichtung bei variierenden Abmessungen des Zwischenraums, beispielsweise bei einer variierenden Abmessung zwischen einem ersten und einem zweiten Schaufelring, also selbst im Falle einer variablen Umgebung, sachgerecht fixiert werden kann. Dazu eignet sich besonders vorteilhaft ein Fixierelement in Form eines Spannelements, dass ein Einspannen der Biegevorrichtung im Zwischenraum entlang der Achse erlaubt. Insbesondere ist das Fixierelement auf unterschiedliche Zwischenräume zwischen den Schaufelringen anpassbar.Preferably, the fixing element is designed for fixing the bending device in the respective intermediate space along the axis. This has the advantage that the bending device can be properly fixed with varying dimensions of the intermediate space, for example with a varying dimension between a first and a second blade ring, ie even in the case of a variable environment. For this purpose, a fixing element in the form of a clamping element that allows clamping of the bending device in the intermediate space along the axis is particularly advantageous. In particular, the fixing element is adaptable to different spaces between the blade rings.

Die Hydraulik der Biegevorrichtung weist vorzugsweise eine Pumpe, eine Führung für Hydraulikfluid, beispielsweise eine Zu- und Abführung, und einen Zylinder zur Betätigung des Stempels auf. Zweckmäßigerweise ist die Hydraulikpumpe auswechselbar. Dazu weist die Biegevorrichtung insbesondere einen variablen Anschluss auf, über den eine Pumpe angeschlossen werden kann. Dies kann beispielsweise eine beliebige Automatikpumpe, z.B. eine oftmals für eine Prägevorrichtung vorhandene Pumpe, sein oder eine manuell betätigbare Handpumpe. Dies hat den Vorteil, dass die Biegevorrichtung mit bereits vorhandenen Pumpen betrieben werden kann.The hydraulic system of the bending device preferably has a pump, a guide for hydraulic fluid, for example an inlet and outlet, and a cylinder for actuating the punch. Appropriately, the hydraulic pump is replaceable. For this purpose, the bending device in particular has a variable connection, via which a pump can be connected. This can be, for example, any automatic pump, eg a pump that is often present for an embossing device, or a manually operated hand pump. This has the advantage that the bending device can be operated with existing pumps.

Vorzugsweise ist der Stempel der Biegevorrichtung auswechselbar. Dies erhöht die Variabilität der Biegevorrichtung und macht die Biegevorrichtung beispielsweise für ein jeweiliges Blech eines Verdichterrades anpassbar. Die Biegevorrichtung kann also für eine Vielzahl von Zwischenräumen mit variablen Abmessungen eingesetzt werden. Trotz unterschiedlicher Abmessungen der Zwischenräume entlang einer Achse eines Verdichters oder einer Turbine kann somit ein und dieselbe Biegevorrichtung zum Biegen eines Bleches in einem Zwischenraum genutzt werden, nämlich indem unter anderem beispielsweise das Fixierelement zum Einspannen der Biegevorrichtung variabel anpassbar ist und zum anderen ein Stempel der Biegevorrichtung auswechselbar ist, insbesondere durch einen Stempel anderer Abmessung ersetzbar ist.Preferably, the punch of the bending device is replaceable. This increases the variability of the bending device and makes the bending device adaptable, for example, to a respective plate of a compressor wheel. The bending device can thus be used for a variety of spaces with variable dimensions. Despite different dimensions of the spaces along an axis of a compressor or a turbine thus one and the same bending device for bending a sheet can be used in a space, namely by, for example, the fixing element for clamping the bending device is variably adjustable and on the other hand a stamp of the bending device is replaceable, in particular by a stamp of other dimensions is replaceable.

Dabei ist der Stempel in Richtung des Radius ausfahrbar. Insbesondere im Falle einer entlang der Achse eines Verdichters oder einer Turbine fixierten Biegevorrichtung ist der Stempel also senkrecht zur Fixierrichtung der Biegevorrichtung ausfahrbar, nämlich in Richtung des Radius. Es hat sich gezeigt, dass eine auf diese Weise relativ zu einer Turbine oder einem Verdichter angeordnete Biegevorrichtung besonders einfach und verlässlich justiert und fixiert werden kann und den Biegevorgang zuverlässig ausführen kann.The punch is extendable in the direction of the radius. In particular, in the case of a bending device fixed along the axis of a compressor or a turbine, the ram can therefore be extended perpendicularly to the fixing direction of the bending device, namely in the direction of the radius. It has been found that a bending device arranged in this way relative to a turbine or a compressor can be adjusted and fixed in a particularly simple and reliable manner and can execute the bending operation reliably.

Entsprechend einer Weiterbildung des Verfahrens wird die Biegevorrichtung dazu im Zwischenraum entlang der Achse fixiert und der Stempel in Richtung des Radius auf das zu biegende Blech zubewegt. Zweckmäßigerweise wird das Blech in eine Nut des Laufrades gekantet.According to a development of the method, the bending device is fixed in the space along the axis and the punch in the direction of the radius moved toward the sheet to be bent. Conveniently, the sheet is folded into a groove of the impeller.

Ausführungsbeispiele der Erfindung werden nachfolgend anhand der Zeichnung beschrieben. Diese soll die Ausführungsbeispiele nicht maßgeblich darstellen, vielmehr ist die Zeichnung, wo zur Erläuterung dienlich, in schematisierter und/oder leicht verzerrter Form ausgeführt. Im Hinblick auf Ergänzungen der aus der Zeichnung unmittelbar erkennbaren Lehren wird auf den einschlägigen Stand der Technik verwiesen. Im Einzelnen zeigt die Zeichnung in:

FIG 1
ein Verdichterrad mit einer fixierten Biegevorrichtung gemäß einer besonders bevorzugten Ausführungsform,
FIG 2
eine perspektivische Teilansicht einer Verdichterradscheibe mit einer Anzahl von axialen Haltenuten zur Aufnahme von Laufschaufelfüßen,
FIG 3A
einen Ausschnitt aus FIG 1 mit einer Turbinenschaufel und mit einem Sicherungsblech vor dem Umbiegen,
FIG 3B
denselben Ausschnitt wie in FIG 3A mit einem Sicherungsblech nach dem Umbiegen, und
FIG 4
eine weitere Teilansicht eines Verdichterrades mit daran befestigten und durch Sicherungsbleche gesicherten Turbinenschaufeln.
Embodiments of the invention are described below with reference to the drawing. This is not intended to represent the embodiments significantly, but the drawing, where appropriate for explanation, executed in a schematized and / or slightly distorted form. With regard to additions of the teachings directly recognizable from the drawing referred to the relevant prior art. In detail, the drawing shows in:
FIG. 1
a compressor wheel with a fixed bending device according to a particularly preferred embodiment,
FIG. 2
3 is a partial perspective view of a compressor wheel disc having a number of axial retention slots for receiving blade feet;
3A
1 with a turbine blade and with a locking plate before bending,
3B
the same section as in FIG 3A with a locking plate after bending, and
FIG. 4
a further partial view of a compressor wheel with attached and secured by locking plates turbine blades.

FIG 1 zeigt ein Laufrad 1 eines nicht näher dargestellten Verdichters mit einer Anzahl von entlang einer Achse 3 des Verdichters angeordneten Schaufelringen 5. Ein Schaufelring 5 weist dabei eine Anzahl von sich entlang einem Radius 7 erstreckenden Schaufeln 9 auf, von denen jeweils eine Schaufel 9 im Schnitt gezeigt ist. Eine Schaufel 9 des Verdichters ist dabei mit ihrem Fuß 11, ähnlich wie bei einer Nut-Feder-Verbindung an einem jeweiligen Segment 13 des Verdichterrades 1 gehalten. Die Nut zur Aufnahme des Fußes 11 ist dabei jeweils als Axialnut ausgeführt. Die Orientierung und Gestaltung derartiger Aufnahmenuten ist exemplarisch in FIG 2 dargestellt, wobei der Pfeil 12 die Richtung der Turbinenachse 3 angibt. Bei der Montage der Schaufel 9 am Laufrad 1 wird der Fuß 11 zusammen mit einem untergelegten Blech 47 in die Nut des Segments 13 eingeschoben.FIG. 1 shows an impeller 1 of a compressor (not shown) with a number of blade rings 5 arranged along an axis 3 of the compressor. A blade ring 5 has a number of blades 9 extending along a radius 7, of which in each case one blade 9 in FIG Section is shown. A blade 9 of the compressor is held with its foot 11, similar to a tongue and groove connection to a respective segment 13 of the compressor wheel 1. The groove for receiving the foot 11 is in each case designed as an axial groove. The orientation and design of such grooves is exemplified in FIG 2, wherein the arrow 12 indicates the direction of the turbine axis 3. During assembly of the blade 9 on the impeller 1, the foot 11 is inserted together with an underlying plate 47 in the groove of the segment 13.

Das Blech 47 ist wie in der Detaildarstellung in FIG 3A ersichtlich mit einem in Umfangsrichtung (d. h. quer zur Achse 3 verlaufenden) Wulst 14 versehen, der in eine korrespondierende Aussparung an der Unterseite des Fußes 11 eingreift. Die Länge des Bleches 47 ist dabei derart bemessen, dass es unmittelbar nach dem Einsetzen in die Nut des Segments 13 an beiden Seiten (d. h. in axialer Richtung) über das Laufrad 1 bzw. den so genannten Radscheibenkopf übersteht. Dies ist in FIG 3A dargestellt. Durch das Umbiegen der überstehenden Laschen wird das Blech 47 und - bedingt durch die Wirkung des Wulstes 14 - auch die Schaufel 9 bezüglich ihrer axialen Position fixiert. Die Anordnung des auf diese Weise als Sicherungsblech wirkenden Bleches 47 nach dem Umbiegen (d. h. im Betriebszustand des Verdichters) ist in FIG 3B dargestellt. Nach dem Umbiegen in die jeweils zur Aufnahme vorgesehene Nut 43 liegen die Laschen des Bleches 47 bündig am Radscheibenkopf an.As can be seen in detail in FIG 3A, sheet 47 is provided with a bead 14 running circumferentially (i.e., transverse to axis 3) which engages a corresponding recess on the underside of foot 11. The length of the sheet 47 is dimensioned such that it projects beyond the impeller 1 or the so-called wheel disc head immediately after insertion into the groove of the segment 13 on both sides (that is, in the axial direction). This is shown in FIG. 3A. By bending over the protruding tabs, the sheet 47 and, due to the action of the bead 14, also the blade 9 are fixed with respect to their axial position. The arrangement of the plate 47, which acts as a safety plate in this manner after bending (that is to say in the operating state of the compressor) is shown in FIG. After bending into the respectively provided for receiving groove 43, the tabs of the plate 47 are flush with the wheel disc head.

Die Lage der Sicherungsbleche 47 in Relation zu den Turbinenschaufeln 9 und dem Radscheibenkopf lässt sich auch anhand der in FIG 4 wiedergegebenen Ansicht verdeutlichen, bei der die Blickrichtung in radialer Richtung (von den Schaufelspitzen zur Turbinenwelle) gewählt ist. Bei dem hier gezeigten Ausschnitt ist ein Blech 47 vor dem Umbiegen und ein Blech 47 nach dem Umbiegen dargestellt. Die jeweilige Aufnahmenut und damit auch das Blech 47 sind in diesem Beispiel leicht gegen die Richtung der Achse 3 geneigt.The position of the locking plates 47 in relation to the turbine blades 9 and the Radscheibenkopf can also be illustrated by the reproduced in Figure 4 view, in which the viewing direction in the radial direction (from the blade tips to the turbine shaft) is selected. In the section shown here, a plate 47 is shown before bending and a plate 47 after bending. The respective receiving groove and thus also the plate 47 are slightly inclined in this example against the direction of the axis 3.

In einem Zwischenraum 15 ist, wie in FIG 1 gezeigt, eine Biegevorrichtung 17 fixiert. Dazu wird die Biegevorrichtung 17 in dem Zwischenraum 15 positioniert und über ein Fixierelement 19 in Form eines Spannelements im Zwischenraum 15 zwischen zwei Anschlägen 21 benachbarter Segmente 13 des Verdichterrades 1 eingespannt. Das Fixierelement 19 kann dabei über eine Schraube 23 oder alternativ über einen Hydraulikzylinder geweitet werden. Das Fixierelement 23 wird entweder lösbar neben der Biegevorrichtung im Zwischenraum 15 angebracht und durch Betätigung der Schraube 23 oder auf hydraulische Weise geweitet. Das Fixierelement kann aber auch direkt an der Biegevorrichtung angebracht sein und bereits mit der Biegevorrichtung im Zwischenraum 15 positioniert werden. Auf diese Weise kann die Biegevorrichtung 17 zusammen mit dem Fixierelement 19 unterschiedliche axiale Breiten aufweisen, die auch auf einen Zwischenraum 15' oder 15 " anpassbar ist, wobei die Zwischenräume 15, 15' und 15 " unterschiedliche Abmessungen haben.In a gap 15, as shown in FIG 1, a bending device 17 is fixed. For this purpose, the bending device 17 is positioned in the intermediate space 15 and clamped by a fixing element 19 in the form of a clamping element in the intermediate space 15 between two stops 21 of adjacent segments 13 of the compressor wheel 1. The fixing element 19 can be widened via a screw 23 or alternatively via a hydraulic cylinder. The fixing member 23 is mounted either releasably adjacent to the bending device in the space 15 and by actuation of the screw 23 or hydraulic Widened way. However, the fixing element can also be attached directly to the bending device and already positioned with the bending device in the intermediate space 15. In this way, the bending device 17 together with the fixing element 19 have different axial widths, which is also adaptable to a gap 15 'or 15 ", wherein the intermediate spaces 15, 15' and 15" have different dimensions.

Eine auf diese Weise fixierte Biegevorrichtung 17 weist darüber hinaus eine Hydraulik 25 auf. Die Hydraulik umfasst bei der in FIG 1 dargestellten Ausführungsform eine Pumpe 27, eine Zuführung 29 und eine Abführung 31 für ein Hydraulikfluid und einen Hydraulikzylinder 33. Der Hydraulikzylinder 33 dient zur Betätigung eines Stempels 35. Der Stempel kann je nach gewähltem Zufluss 37 oder Abfluss 39 in einer entsprechenden Bewegung 41 entlang einem Radius 7 aus- oder eingefahren werden. Zum Biegen eines Bleches 47 wird der Stempel 35 der Biegevorrichtung 17 hydraulisch betätigt, wobei der Stempel 35 entlang dem Radius 7 auf das zu biegende Blech 47 zubewegt wird. Auf diese Weise wird das zu biegende Blech 47 unter Einwirkung des Stempels 35 gekantet. Dabei wirkt der Anschlag 45 als Kantleiste für das zu biegende Blech 47.A bending device 17 fixed in this way also has a hydraulic system 25. In the embodiment illustrated in FIG. 1, the hydraulic system comprises a pump 27, a feed 29 and an outlet 31 for a hydraulic fluid and a hydraulic cylinder 33. The hydraulic cylinder 33 serves to actuate a punch 35. The punch can, depending on the selected inflow 37 or outflow 39 in a corresponding movement 41 along a radius 7 off or retracted. For bending a sheet 47, the punch 35 of the bending device 17 is hydraulically actuated, wherein the punch 35 is moved along the radius 7 on the sheet 47 to be bent. In this way, the sheet to be bent 47 is folded under the action of the punch 35. In this case, the stopper 45 acts as a edge strip for the sheet 47 to be bent.

Die Bewegung des Stempels wird durch einen Hydraulikkolben 49 bewirkt, der bei Zufuhr 37 von Hydraulikflüssigkeit aus der Pumpe 27 ausfährt. Der Stempel 35 ist auswechselbar, so dass er auf das jeweilig zu montierende Blech 47, das als Sicherungsblech ausgeführt ist, angepasst ist. Im Zwischenraum 15' und im Zwischenraum 15" kann also jeweils ein anderer Stempel zum Biegen eines Sicherungsbleches genutzt werden. Wie erläutert, fährt ein Stempel beim Ausfahren des Kolbens 49 radial auf das umzubiegende Blech 47 zu und kantet dieses an dem als Kantleiste wirkenden Anschlag 45 um.The movement of the punch is effected by a hydraulic piston 49, which extends from the pump 27 at supply 37 of hydraulic fluid. The punch 35 is replaceable, so that it is adapted to the respective to be mounted plate 47, which is designed as a locking plate. In the intermediate space 15 'and in the intermediate space 15 ", a different punch can thus be used to bend a securing plate. As explained, a punch moves radially on the sheet 47 to be bent during extension of the piston 49 and edges it on the stop 45 acting as a border around.

Alternativ oder zusätzlich zu einer Handpumpe kann auch eine vorhandene Hydraulikpumpe, beispielsweise eine Hydraulikpumpe für eine mobile Anprägevorrichtung, genutzt werden. Dazu kann die Biegevorrichtung 17 mit einem variablen Anschluss zum Anschließen unterschiedlicher Pumpen 27 versehen sein. Die für den Antrieb des Hydraulikzylinders 33 mit dem Stempel 35 vorgesehene Pumpe 27 kann auch zur Betätigung des Fixierelementes 19 verwendet werden, sofern dieses hydraulisch ausgeführt ist. Dabei kann durch im System der Hydraulikleitungen angebrachte Wegeventile jeweils die eine oder die andere Funktionseinheit angesteuert werden.Alternatively or in addition to a hand pump, an existing hydraulic pump, for example a hydraulic pump for a mobile embossing device, can also be used. This can the bending device 17 may be provided with a variable connection for connecting different pumps 27. The provided for the drive of the hydraulic cylinder 33 with the punch 35 pump 27 can also be used to actuate the fixing element 19, if this is carried out hydraulically. In this case, each one or the other functional unit can be controlled by mounted in the system of hydraulic lines directional control valves.

Um beim Fixieren der Biegevorrichtung 17 im Zwischenraum 15, 15', 15" zwischen zwei benachbarten Schaufelringen 5 die an der Oberfläche des Laufrades 1 angeordneten Dichtringe 50 oder Dichtspitzen, die den Schaufelspitzen oder dem so genannten Deckband der in den Zwischenraum 15, 15', 15" eingreifenden, hier nicht näher dargestellten bzw. zur Wartung demontierten Leitschaufeln gegenüberliegen, nicht zu beschädigen, ist die Biegevorrichtung 17 gemäß der in der FIG 1 dargestellten Ausführungsform mit einem Dichtspitzenschutz 51 versehen. Dazu ist der Dichtspitzenschutz 51 als polymere oder aus einem Weichmetall gefertigte Auflage, die auswechselbar an der Biegevorrichtung 37 befestigt ist, ausgeführt.To fix the bending device 17 in the gap 15, 15 ', 15 "between two adjacent blade rings 5 arranged on the surface of the impeller 1 sealing rings 50 or sealing tips, the blade tips or the so-called shroud in the gap 15, 15', 15 "engaging, not shown here opposite or disassembled for maintenance vanes, not to damage, the bending device 17 is provided according to the embodiment shown in FIG 1 with a sealing tip protection 51. For this purpose, the sealing tip protection 51 as a polymeric or made of a soft metal pad, which is interchangeable attached to the bending device 37, executed.

Um das Biegen eines Bleches 47 in einem Zwischenraum 15, 15', 15" zwischen zwei entlang einer Achse 3 eines Verdichters oder einer Turbine angeordneten Schaufelringen 5 mit sich entlang einem Radius 7 erstreckenden Schaufeln 9 einfacher und effektiver zu gestalten, sieht das neue Konzept eine Biegevorrichtung 17 vor, die in dem Zwischenraum 15, 15', 15" positionierbar ist und gemäß der Erfindung ein Fixierelement 19 für die Biegevorrichtung 17, eine Hydraulik 25 und einen durch die Hydraulik 25 betätigbaren Stempel 35 aufweist. Entsprechend sieht ein Verfahren zum Biegen eines Bleches 47 in dem Zwischenraum 15, 15', 15" vor, dass eine Biegevorrichtung 17 in dem Zwischenraum 15, 15', 15" positioniert wird, die Biegevorrichtung 17 in dem Zwischenraum 15, 15', 15" fixiert wird, zum Biegen des Bleches 47 ein Stempel 35 der Biegevorrichtung 17 hydraulisch betätigt wird, wobei der Stempel 35 auf das zu biegende Blech 47 zubewegt wird und das Blech 47 unter Einwirkung des Stempels 35 gebogen wird.In order to make the bending of a sheet 47 in a gap 15, 15 ', 15 "between two blade rings 5 arranged along an axis 3 of a compressor or a turbine with blades 9 extending along a radius 7 simpler and more effective, the new concept sees one Bending device 17, which is in the gap 15, 15 ', 15 "positionable and according to the invention, a fixing member 19 for the bending device 17, a hydraulic 25 and an actuatable by the hydraulic 25 punch 35 has. Accordingly, a method for bending a sheet 47 in the gap 15, 15 ', 15 "provides that a bending device 17 is positioned in the gap 15, 15', 15", the bending device 17 in the gap 15, 15 ', 15 is fixed, for bending the sheet 47, a punch 35 of the bending device 17 is hydraulically actuated, wherein the punch 35 is moved to the sheet 47 to be bent and the sheet 47 is bent under the action of the punch 35.

Claims (11)

  1. Bending device (17) which can be positioned for bending a plate (47) in an intermediate space (15, 15', 15") between two blade rings (5) arranged along an axis (3) of a compressor or a turbine and having blades (9) extending along a radius (7), characterized in that the bending device has a fixing element (19), a hydraulic system (25), and a punch (35) which can be actuated by the hydraulic system (25) and which can be extended in the direction of the radius (7).
  2. Bending device (17) according to Claim 1 in the form of a mobile portable bending device which can be inserted into the intermediate space.
  3. Bending device (17) according to Claim 1 or 2, characterized in that the fixing element (19) is designed for fixing the bending device (17) in the intermediate space (15, 15', 15") along the axis (3).
  4. Bending device (17) according to one of Claims 1 to 3, characterized in that the fixing element (19) is in the form of a clamping element which enables the bending device (17) to be clamped in place in the intermediate space (15, 15', 15") along the axis (3).
  5. Bending device (17) according to one of Claims 1 to 4, characterized in that the fixing element (19) can be adapted to different intermediate spaces (15, 15', 15") between blade rings (5).
  6. Bending device (17) according to one of Claims 1 to 5, characterized in that a hydraulic pump (27) is interchangeable.
  7. Bending device (17) according to one of Claims 1 to 6, characterized in that the punch (35) is interchangeable.
  8. Method for bending a plate in an intermediate space (15, 15', 15") between two blade rings (5) arranged along an axis (3) of a compressor or a turbine and having blades (9) extending along a radius (7), in which
    - a bending device (17) according to Claim 1, is positioned in the intermediate space (15, 15', 15"),
    characterized in that
    - the bending device (17) is fixed in the intermediate space (15, 15', 15") with a fixing element,
    - a punch (35), which can be extended in the direction of the radius, of the bending device (17) is actuated hydraulically for bending the plate (47),
    - the punch (35) being moved toward the plate (47) to be bent, and
    - the plate (47) being bent under the effect of the punch (35).
  9. Method according to Claim 8, characterized in that the bending device (17) is fixed in the intermediate space (15, 15', 15") along the axis (3).
  10. Method according to Claim 8 or 9, characterized in that the punch (35) is moved in the direction of the radius (7) toward the plate (47) to be bent.
  11. Method according to one of Claims 8 to 10, characterized in that the plate (47) is folded into a groove (43) of an impeller (1).
EP05005872A 2005-03-17 2005-03-17 Caulking device and method of caulking the locking tabs in a compressor or turbine Not-in-force EP1703078B1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
ES05005872T ES2285594T3 (en) 2005-03-17 2005-03-17 CURVATOR AND CURVING PROCEDURE OF A SAFETY SHEET IN A COMPRESSOR OR A TURBINE.
PL05005872T PL1703078T3 (en) 2005-03-17 2005-03-17 Caulking device and method of caulking the locking tabs in a compressor or turbine
AT05005872T ATE363585T1 (en) 2005-03-17 2005-03-17 BENDING DEVICE AND METHOD FOR BENDING A LOCK PLATE IN A COMPRESSOR OR TURBINE
EP05005872A EP1703078B1 (en) 2005-03-17 2005-03-17 Caulking device and method of caulking the locking tabs in a compressor or turbine
DE502005000782T DE502005000782D1 (en) 2005-03-17 2005-03-17 Bending device and method for bending a lock plate in a compressor or a turbine
CNB2006100086332A CN100443209C (en) 2005-03-17 2006-02-20 Caulking device and method of caulking the locking tabs in a compressor or turbine
US11/385,048 US7415763B2 (en) 2005-03-17 2006-03-17 Bending device and method for bending a plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05005872A EP1703078B1 (en) 2005-03-17 2005-03-17 Caulking device and method of caulking the locking tabs in a compressor or turbine

Publications (2)

Publication Number Publication Date
EP1703078A1 EP1703078A1 (en) 2006-09-20
EP1703078B1 true EP1703078B1 (en) 2007-05-30

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EP05005872A Not-in-force EP1703078B1 (en) 2005-03-17 2005-03-17 Caulking device and method of caulking the locking tabs in a compressor or turbine

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US (1) US7415763B2 (en)
EP (1) EP1703078B1 (en)
CN (1) CN100443209C (en)
AT (1) ATE363585T1 (en)
DE (1) DE502005000782D1 (en)
ES (1) ES2285594T3 (en)
PL (1) PL1703078T3 (en)

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US8562301B2 (en) * 2010-04-20 2013-10-22 Hamilton Sundstrand Corporation Turbine blade retention device
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Also Published As

Publication number Publication date
US7415763B2 (en) 2008-08-26
EP1703078A1 (en) 2006-09-20
ATE363585T1 (en) 2007-06-15
ES2285594T3 (en) 2007-11-16
US20060207309A1 (en) 2006-09-21
PL1703078T3 (en) 2007-10-31
CN1833792A (en) 2006-09-20
DE502005000782D1 (en) 2007-07-12
CN100443209C (en) 2008-12-17

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