EP4187060A1 - Device and method for heat treating a rotor or rotor disc of a turbomachine - Google Patents
Device and method for heat treating a rotor or rotor disc of a turbomachine Download PDFInfo
- Publication number
- EP4187060A1 EP4187060A1 EP21425058.1A EP21425058A EP4187060A1 EP 4187060 A1 EP4187060 A1 EP 4187060A1 EP 21425058 A EP21425058 A EP 21425058A EP 4187060 A1 EP4187060 A1 EP 4187060A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotor
- parts
- rotor disc
- wedge shaped
- heater
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims description 10
- 238000003825 pressing Methods 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims description 36
- 239000012212 insulator Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 description 7
- 238000003466 welding Methods 0.000 description 7
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000000977 initiatory effect Effects 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Images
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
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/28—Supporting or mounting arrangements, e.g. for turbine casing
- F01D25/285—Temporary support structures, e.g. for testing, assembling, installing, repairing; Assembly methods using such structures
-
- 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
- F01D19/00—Starting of machines or engines; Regulating, controlling, or safety means in connection therewith
- F01D19/02—Starting of machines or engines; Regulating, controlling, or safety means in connection therewith dependent on temperature of component parts, e.g. of turbine-casing
-
- 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
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
- F01D21/003—Arrangements for testing or measuring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/10—Heating, e.g. warming-up before starting
-
- 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
- F01D5/005—Repairing methods or devices
-
- 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
- F01D5/12—Blades
- F01D5/14—Form or construction
- F01D5/141—Shape, i.e. outer, aerodynamic form
-
- 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
- F01D5/12—Blades
- F01D5/14—Form or construction
- F01D5/147—Construction, i.e. structural features, e.g. of weight-saving hollow blades
-
- 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
- F01D5/12—Blades
- F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
- F01D5/286—Particular treatment of blades, e.g. to increase durability or resistance against corrosion or erosion
-
- 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
- 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
- F01D5/3007—Fixing blades to rotors; Blade roots ; Blade spacers of axial insertion type
-
- 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
- F05D2230/40—Heat treatment
-
- 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
- F05D2230/80—Repairing, retrofitting or upgrading 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
- F05D2270/00—Control
- F05D2270/30—Control parameters, e.g. input parameters
- F05D2270/303—Temperature
Definitions
- rotors undergo large stress that may cause crack initiation; for example, areas of the rotor prone to crack initiation are the teeth defining slots where blades (e.g. turbine blades or compressor blades) or generator windings are connected.
- blades e.g. turbine blades or compressor blades
- generator windings are connected.
- the cracks as a rule are monitored and in case their size becomes too large, the rotors are replaced.
- the impossibility to carry out heat treatments on the rotors after manufacturing prevents the rotors from being repaired when cracks are identified.
- Figure 2 shows a portion of a cross section through line II-II of figure 1 and shows the profile of the rotor or rotor disc with teeth 3 defining slots 4 inbetween; the slots 4 house and hold blades, e.g. of a turbine or compressor. In different embodiments the slots may also hold the winding of a turbogenerator or a hydro generator.
- Figure 2 specifically shows the teeth 3 and slots 4 of a gas turbine where turbine rotor blades are connected via their root.
- the parts 18 have at least a first hole that houses the heater 15.
- the heater may be interchangeable, such that a specific heater, able to supply the required heat flux, can be provided according to the heat treatment to be carried out.
- control unit 17 can drive the heaters 15 based on the measurements of the temperature sensors 16 in order to cause a predefined temperature profile over time through the tooth 3.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
- The present invention relates to a device and method for heat treating a rotor or rotor disc of a turbomachine.
- The turbomachine can for example be a gas turbine, a steam turbine or another turbomachine, such as a turbogenerator or a hydro generator.
- Rotors or rotor discs (in the following both addressed as rotors) during manufacturing undergo a heat treatment to relax stress and to improve material properties. After this initial heat treatment, rotors as a rule do not undergo further heat treatments, because material properties would be inevitably affected. For example, rotors of a gas turbine may be manufactured by welding together a plurality of discs; typically, after welding, the rotor discs undergo a heat treatment to relax stress in the heated affected zones.
- During operation, rotors undergo large stress that may cause crack initiation; for example, areas of the rotor prone to crack initiation are the teeth defining slots where blades (e.g. turbine blades or compressor blades) or generator windings are connected. When this happen, the cracks as a rule are monitored and in case their size becomes too large, the rotors are replaced. Thus, the impossibility to carry out heat treatments on the rotors after manufacturing prevents the rotors from being repaired when cracks are identified.
- An aspect of the invention includes providing a device and a method for heat treating rotors or rotor discs after the initial heat treatment carried out during manufacturing.
- These and further aspects are attained by providing a device and a method in accordance with the accompanying claims.
- For example, a heat treatment after the initial heat treatment can be required during servicing of a turbomachine, when cracks on the rotor are identified. In such a case the cracks could be repaired e.g. by welding and a heat treatment to relax the stress caused by the welding and improve the material properties of at the area where welding was carried out could be required.
- Advantageously, the heat treatment is a localised heat treatment, so that the bulk of the rotor material is not affected by the heat treatment and the material properties thereof are thus not affected, but a localised area where e.g. reparation occurred or stress relaxation was required undergoes the heating/staying/cooling cycle foreseen by the heat treatment.
- Further characteristics and advantages will be more apparent from the description of a preferred but non-exclusive embodiment of the device and method, illustrated by way of non-limiting example in the accompanying drawings, in which:
-
Figure 1 shows a side view of a rotor of a turbomachine, such as a gas turbine; -
Figure 2 shows a portion of a cross section through line II-II of the rotor offigure 1 ; -
Figures 3A through 5B show embodiments of a device with parts thereof pressed outwardly; -
Figure 6 shows an embodiment of the device with parts thereof pressed inwardly; -
Figure 7 shows a plurality of devices applied onto a rotor for carrying out the method; -
Figure 8 is a particular of a device connected to a tooth of a rotor or rotor disc of a gas turbine. - With reference to the figures,
figure 1 shows a rotor 1 for a turbomachine, such as a gas turbine or a steam turbine or a turbogenerator or a hydro generator. - The rotor 1 is typically made of a plurality of
rotor discs 2 connected together, e.g. by bolts or welding. Alternatively the rotor may also be made in one piece, e.g. forged in one piece. -
Figure 2 shows a portion of a cross section through line II-II offigure 1 and shows the profile of the rotor or rotor disc withteeth 3 definingslots 4 inbetween; theslots 4 house and hold blades, e.g. of a turbine or compressor. In different embodiments the slots may also hold the winding of a turbogenerator or a hydro generator.Figure 2 specifically shows theteeth 3 andslots 4 of a gas turbine where turbine rotor blades are connected via their root. - The
device 7 for heat treating the rotor or rotor disc has anelement 8 with at least asurface area 9 arranged for contacting asurface 10 to be treated of the rotor orrotor disc 2. - The
device 7 has aconnector 12, which is arranged for elastically pressing thesurface areas 9 of theelement 8 against thesurface 10 to be treated of the rotor orrotor disc 2. - The
device 7 further has one ormore heaters 15, such as electric resistors, connected to theelement 8 and one ormore temperature sensors 16, such as thermocouples, connected to theelement 8 as well. - A
control unit 17 is provided, for driving theheaters 15 based on a temperature measured by thetemperature sensors 16. - In preferred embodiments, the
element 8 comprises at least twoparts 18 having at least aheater 15 and at least atemperature sensor 16. - In this connection, the
parts 18 have at least a first hole that houses theheater 15. The heater may be interchangeable, such that a specific heater, able to supply the required heat flux, can be provided according to the heat treatment to be carried out. - Advantageously, the first hole is adjacent the
surface area 9 of the element. This because the heat is transferred to the rotor or rotor disc via the contactingsurface areas 9 of theelement 8 andsurface 10 of the rotor or rotor disc. - The
parts 18 further have one or more second holes housing the temperature sensor orsensors 16. For example, the second holes are blind holes that open at the opposite sides of thepart 18; a thermocouple as atemperature sensor 16 is inserted in each of the second holes. - The
parts 18 are advantageously at opposite sides of theelement 8, such that theelement 8 can be steadly connected into aslot 4. In such a case, between the parts 8 athermal insulator 22 is provided, so that heat provided at one side of theelement 8 does not affect the other side. For example, in case the heat treatment is only carried out at one side of theelement 8, the other side is not heated or is heated in a non effective manner, i.e. in a manner non effective to alter the properties of the rotor or rotor disc. The thermal insulator may be defined by an air gap or by thermally insulating material. - Different embodiments are foreseeable for the
connector 12. - The
connector 12 can be provided between theparts 18 and can be arranged for elastically pressing the parts outwardly. - For example the
connector 12 can comprise one or more springs, such as leaf springs, special springs (like V shaped springs), helical springs, etc.. - In a different embodiment, the
connector 12 can comprise one or more wedge shapedbodies parts 18 at opposite sides of theelement 8 can define a wedge shapedseat 24 and the surfaces of the wedgeshaped bodies seat 24. Springs are also provided that press the wedge shapedbodies seat 24. - In addition, the
element 8 can further comprise abottom part 25, also havingheater 15.Bolts 27 are connected to thebottom part 25 and extends through the wedgeshaped bodies springs 28 are inserted on thebolt 27 betweenstops 29 provided at the bolt end opposite the end connected to thebottom part 25 and the wedge shapedbodies bolts 27 can press the wedge shapedbody 23 to thebottom part 25 and twofurther bolts 27 can press the wedge shapedbody 34 to thebottom part 25. Thanks to the shape of the wedge shapedbodies seat 24, thesurface areas 9 are pressed to thesurface 10 to guarantee thermal conductivity. - The figures show embodiments where the
element 8 has a firtree surface profile 30, with the firtree surface profile 30 definingside projections 32. Advantageously, eachside projection 32 is defined by onepart 18. - The
connector 12 can also be provided around theparts 18 and can be arranged for elastically pressing theparts 18 inwardly. In this case theconnector 12 can comprise one or preferably more than one elastic band, provided around the elements. Other embodiments ofconnector 12 may include bands made of a rigid element with ends of the rigid element connected by an elastic element; for example a metal wire whose ends are connected by a helical spring may be envisaged. - Particular embodiments are now described with specific reference to the figures.
-
Figure 3A shows an embodiment of adevice 7 with anelement 8 made of fiveparts 18. Eachpart 18 at the sides of theelement 8 has a first hole housing a heat resistance as aheater 15 and second holes opening at opposite sides thereof and each housing a thermocouple astemperature sensor 16. Leaf springs are provided between side-by-side parts 18 asconnectors 12, to guarantee the contact and thermal conductivity between thesurface areas 9 and thesurfaces 10. - Likewise,
figure 3B shows an embodiment similar to the one offigure 3A ; this embodiment is arranged for heat treating atooth 3 only at a side thereof and consequently theparts 18 at the right offigure 3B are not provided with heaters and temperature sensors. In this case it is possible that parts without hole for housing theheater 15 ortemperature sensors 16 are provided or the holes may be left empty or also theheaters 15 andtemperature sensors 16, even if provided, are not used, i.e. are not connected to thecontrol unit 17 or their signal is not used to drive the heat treatment. The temperature measurement can anyway be used to control the temperature at thetooth 3 that does not undergo heat treatment.Figure 3B also shows thebottom part 18 with an asymmetric shape defining acutout 35, so that it only contacts thetooth 3 to be treated (tooth on the left infigure 3B ) but not thetooth 3 that does not have to undergo heat treatment (tooth on the right infigure 3B ). -
Figure 4 shows an embodiment of adevice 7 with anelement 8 made of sixparts 18. - Each
part 18 has a first hole housing a heat resistance as aheater 15 and second holes housing thermocouples astemperature sensors 16. V-shaped springs asconnectors 12 are provided between side-by-side parts 18 to guarantee the contact and the thermal conductivity betweensurface areas 9 and surfaces 10. -
Figures 5A-5B show an embodiment of adevice 7 with anelement 8 made of fourparts 18 and an additionalbottom part 25. Theparts 18 at the sides have first holes housing heat resistances as aheater 15 and second holes housing thermocouples astemperature sensors 16. Theside parts 18 define a wedge shapedseat 24 and wedge shapedbodies seat 24. Thebottom part 25 has first holes housing heat resistances as aheater 15, and second holes housing thermocouples astemperature sensors 16. -
Figure 6 shows an embodiment of adevice 7 with anelement 8 made of sixparts 18. - Each
part 18 has one first hole housing a heat resistance as aheater 15 and second holes housing thermocouples astemperature sensors 16. Elastic bands are provided around theparts 18 asconnectors 12. - In the following, with reference to
figure 7 , the arrangement of the rotor or rotor disc connected to one ormore devices 7 for heat treating it is described. - The
surface profile 30 of theelement 8 fits asurface profile 31 of atooth 3; theelement 8 is housed in agroove 4 with itssurface profile 30 matching thesurface profile 31 of thetooth 4.Surface areas 9 of theelement 8 contact surfaces 10 to be treated of the rotor or rotor disc andsurface portions 33 of theelement 8 adjacent thesurface areas 9 do not contact thesurface profile 31. - Thanks to the device the rotor or rotor disc can be locally heat treated.
- In fact, since the
surfaces area 9 through which heat is transferred from thedevice 7 to the rotor or rotor disc are in contact with thesurfaces 10 to be treated, the heat treatment can be carried out at thesurfaces 10 and zones of the rotor or rotor disc adjacent thereto. These are the zones of the rotor or rotor disc, which e.g. got a welding repair and require a heat treatment to reduce the stress. In contrast, since thesurface portions 33 of theelement 8 do not contact thesurface profile 31, there is no or no appreciable heat transferred trough these surfaces. This way, the heat transferred and thus the heat treatment can be easily controlled. - The present invention also refers to a method for heat treating a rotor or rotor disc of a turbomachine.
- The method comprises heating a
rotor tooth 3 at both its sides by one ormore devices 7. - Advantageously, thanks to the
devices 7, the heat treatment can be carried out while maintaining the temperature through thetooth 3 uniform or substantially uniform, i.e. differences of temperature through the tooth are in a limited range, e.g. 20 °C or 10°C or less. This uniformity of temperature during the heat treatment guarantees that stress is not induced in thetooth 3 because of the heat treatment but to the contrary stress can be relieved. In addition, the material properties of the whole of the rotor or rotor disc are not affected, because the heat treatment is carried out only at a portion thereof. - The operation of the
device 7 is apparent from that described and illustrated and is substantially the following. - In the following specific reference to the embodiments of
figures 3 through 5 is made. -
Devices 7 are provided inslots 4 at the opposite sides of onetooth 3. - The
control unit 17 then drives theheaters 15, such that they supply heat to theparts 18 and via thesurface areas 9 to thesurfaces 10 to be treated and zones adjacent thereto. - The
control unit 17 can drive theheater 15 based on the temperature measured by thetemperature sensors 16. In this connection, thecontrol unit 17 can drive eachheater 15 independently from the others and only based on the temperature measured by thetemperature sensors 16 adjacent to it and housed in thesame part 18. Different controls are naturally possible, and thecontrol unit 17 can drive theheaters 15 based on average temperatures measured by all or part of thetemperature sensors 16. - In addition, the
control unit 17 can drive theheaters 15 based on the measurements of thetemperature sensors 16 in order to cause a predefined temperature profile over time through thetooth 3. - In particularly advantageous embodiments, the heating to be provided or the temperature cycle the
rotor tooth 3 has to undergo is calculated first and thecontrol unit 17 drives theheaters 15 based on the measurements of thetemperature sensors 16 to reproduce the calculated heating or temperature cycle. - Advantageously, thanks to the
devices 7, heat treatment is carried out only at theteeth 3. Thesurfaces 10 of the teeth through which heat is transferred (i.e. thesurfaces 10 in contact with the surface areas 9) are those more stressed during operation, because of the interaction with the blade roots. - The
parts 18 defining theelement 8,heaters 15,temperature sensors 16,connectors 12 may define a kit of components that may be assembled to carry out the heat treatment and then disassembled, as required for each specific heat treatment to be carried out in terms of heating to be transferred and teeth to be treated. - Naturally the features described may be independently provided from one another. In practice the materials used and the dimensions can be chosen at will according to requirements and to the state of the art.
Claims (15)
- A device (7) for heat treating a rotor (2) or rotor disc of a turbomachine, characterised by comprisingan element (8) with at least a surface area (9) arranged for contacting a surface (10) to be treated of the rotor (2) or rotor disc,at least a connector (12) arranged for elastically pressing the at least a surface area (9) of the element (8) against the surface (10) to be treated of the rotor (2) or rotor disc,at least a heater (15) connected to the element (8),at least a temperature sensor (16) connected to the element (8),a control unit (17) for driving the heater (15) based on a temperature measured by the temperature sensor (16).
- The device (7) of claim 1, characterised in that the element (8) comprises at least two parts (18) having at least a heater (15) and at least a temperature sensor (16).
- The device (7) of claim 2, characterised in that the at least two parts (18) are at opposite sides of the element (8), wherein a thermal insulator (22) is provided between the parts (8).
- The device (7) of any of the previous claims, characterised in that each part (18) has at least a first hole housing the at least a heater (15).
- The device (7) of claim 4, characterised in that the first hole is adjacent the surface area (9) of the element (8).
- The device (7) of any of any of the previous claims, characterised in that each part (18) has at least a second hole housing the at least a temperature sensor (16).
- The device (7) of any of claims 1 through 6, characterised in that the connector (12) is provided between the at least two parts (18) and is arranged for elastically pressing the two parts (18) outwardly.
- The device (7) of claim 7, characterised in that the connector (12) comprises a spring.
- The device (7) of claim 8, characterised in thatthe parts (18) at opposite sides of the element (8) define a wedge shaped seat (24),
whereinthe connector (12) further comprises at least a wedge shaped body (23, 34), surfaces of the wedge shaped body (23, 34) are slidingly connected to the wedge shaped seat (24),the spring presses the wedge shaped body (23, 34) against the wedge shaped seat (24). - The device of any of claims 1 through 6, characterised in that the connector (12) is provided between the at least two parts (18) and is arranged for elastically pressing the two parts inwardly.
- The device (7) of any of any of the previous claims, characterised in that the element (8) has a fir tree surface profile (30),
the fir tree surface profile (30) of the element (8) defines side projections (32), each side projection (32) is defined by one part (18). - A kit of components comprising parts (18) arranged for defining an element (8), heaters (15), temperature sensors (16), connectors (12), control unit (17), wherein the components can be assembled defining a device (7) according to any of claims 1 through 11.
- An arrangement of a rotor (2) or rotor disc and a device (7) according to any of claims 1 through 11, characterized in thatthe rotor (2) or rotor disc has teeth (3) defining grooves (4) arranged for housing blades or windings,the element (8) is housed in a groove (4) with its surface profile (30) matching a surface profile (31) of the tooth (3),surface areas (9) of the element (8) contact surfaces (10) to be treated of the rotor (2) or rotor disc,surface portions (33) of the element (8) adjacent the surface areas (9) do not contact the surface profile (31) of the rotor (2) or rotor disc.
- A method for heat treating a rotor (2) or rotor disc of a turbomachine, comprising heating a rotor tooth (3) at both its sides by at least a device (7) according to any of claims 1 through 11.
- The method of claim 14, characterized in thata heating to be provided to the rotor tooth (3) or a temperature cycle the rotor tooth (3) has to undergo is calculated, anda control unit (17) drives heaters (15) based on measurements of temperature sensors (16) of the at least a device (7), to reproduce the calculated heating or temperature cycle.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP21425058.1A EP4187060A1 (en) | 2021-11-26 | 2021-11-26 | Device and method for heat treating a rotor or rotor disc of a turbomachine |
CN202211488680.7A CN116181417A (en) | 2021-11-26 | 2022-11-25 | Device and method for heat treating a rotor or a rotor disk of a turbomachine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP21425058.1A EP4187060A1 (en) | 2021-11-26 | 2021-11-26 | Device and method for heat treating a rotor or rotor disc of a turbomachine |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4187060A1 true EP4187060A1 (en) | 2023-05-31 |
Family
ID=79230874
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21425058.1A Pending EP4187060A1 (en) | 2021-11-26 | 2021-11-26 | Device and method for heat treating a rotor or rotor disc of a turbomachine |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP4187060A1 (en) |
CN (1) | CN116181417A (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4570053A (en) * | 1983-05-04 | 1986-02-11 | General Electric Company | Apparatus for heating a turbine wheel |
CA2889339A1 (en) * | 2012-10-29 | 2014-05-15 | General Electric Company | Local heat treatment and thermal management system for engine components |
JP2018123824A (en) * | 2016-11-04 | 2018-08-09 | ゼネラル・エレクトリック・カンパニイ | Installation or removal of turbine blade at turbine blade base |
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2021
- 2021-11-26 EP EP21425058.1A patent/EP4187060A1/en active Pending
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2022
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Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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US4570053A (en) * | 1983-05-04 | 1986-02-11 | General Electric Company | Apparatus for heating a turbine wheel |
CA2889339A1 (en) * | 2012-10-29 | 2014-05-15 | General Electric Company | Local heat treatment and thermal management system for engine components |
JP2018123824A (en) * | 2016-11-04 | 2018-08-09 | ゼネラル・エレクトリック・カンパニイ | Installation or removal of turbine blade at turbine blade base |
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