WO2022223827A1 - Empilement cylindrique de bague de fixation pour le traitement de surface d'aubes de turbine - Google Patents

Empilement cylindrique de bague de fixation pour le traitement de surface d'aubes de turbine Download PDF

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Publication number
WO2022223827A1
WO2022223827A1 PCT/EP2022/060780 EP2022060780W WO2022223827A1 WO 2022223827 A1 WO2022223827 A1 WO 2022223827A1 EP 2022060780 W EP2022060780 W EP 2022060780W WO 2022223827 A1 WO2022223827 A1 WO 2022223827A1
Authority
WO
WIPO (PCT)
Prior art keywords
segment
ring
turbine vanes
fixture
turbine
Prior art date
Application number
PCT/EP2022/060780
Other languages
English (en)
Inventor
Ruedi Meiler
Carmen JERG
Simon BELVÈZE
Original Assignee
Oerlikon Surface Solutions Ag, Pfäffikon
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Oerlikon Surface Solutions Ag, Pfäffikon filed Critical Oerlikon Surface Solutions Ag, Pfäffikon
Priority to CN202280030295.XA priority Critical patent/CN117203018A/zh
Priority to KR1020237036091A priority patent/KR20230169176A/ko
Priority to EP22725403.4A priority patent/EP4326486A1/fr
Priority to JP2023564633A priority patent/JP2024515716A/ja
Publication of WO2022223827A1 publication Critical patent/WO2022223827A1/fr
Priority to US18/382,854 priority patent/US20240051083A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
    • B23Q3/06—Work-clamping means
    • B23Q3/062—Work-clamping means adapted for holding workpieces having a special form or being made from a special material
    • B23Q3/063—Work-clamping means adapted for holding workpieces having a special form or being made from a special material for holding turbine blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
    • B23Q3/10—Auxiliary devices, e.g. bolsters, extension members
    • B23Q3/103—Constructional elements used for constructing work holders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
    • B24B31/06—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving oscillating or vibrating containers
    • B24B31/064—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving oscillating or vibrating containers the workpieces being fitted on a support

Definitions

  • the present invention refers to a mount for multiple substrates to be treated in a surface treatment.
  • a whole series of different processes are known for the polishing of surface layers of workpieces, depending on the application, material and structure of the surface layer.
  • the purpose of the polishing frequently consists of reducing the roughness of the surface in addition to a pure removal of material at the surfaces. This can be desired, for example, for purely aesthetic reasons, for instance to produce glossy surfaces, or it can be required due to technical demands, for example to reduce coefficients of friction, to minimize the adhesion or inclusion of foreign particles such that a required porosity of the surface is maintained, or to prevent soiling of the surface. Aerodynamics can thereby be improved, increase of efficiency and therefore reduction of kerosene consumption.
  • the roughness of the surface of a solid is characterized by different roughness measuring parameters which can be found in the corresponding technical literature.
  • One of these roughness measuring parameters is the so-called “average roughness value Ra" which, as the mean deviation of the absolute amounts of the roughness profile from a central line within a pre-settable measuring path, is a measure for the roughness of a surface and which is given, in dependence on the degree of the roughness, in micrometers (pm) for example.
  • turbine vanes for airplane turbines or for land-based gas turbines for the generation of electrical energy are provided, for example, with layers of metallic alloys, in particular with MCrAIY layers, with M standing for a metal such as nickel (Ni), cobalt (Co) or iron (Fe) and CrAIY (chromium, aluminum, yttrium) designating a super alloy very familiar for this and other purposes.
  • MCrAIY layers with M standing for a metal such as nickel (Ni), cobalt (Co) or iron (Fe) and CrAIY (chromium, aluminum, yttrium) designating a super alloy very familiar for this and other purposes.
  • These layers can, for example, be applied in a vacuum chamber in a thickness between 50 pm and 250 pm, with a surface roughness R a typically being achieved of approximately 6 pm-12 pm.
  • TBC coatings can be manufactured, for example, on a zirconia (ZrO 2 ) basis, with--in a typical example--the heat insulating layer being able to be approximately 100 pm up to 500 pm thick, in special cases more than 1 mm and substantially including 92% ZrO 2 and 8% yttrium oxide Y 2 O 3 for stabilization.
  • the grain sizes of the grains making up the layer can lie, for example, between 45 pm and 125 pm, with a porosity of the heat insulating layer being typically reached at between 5% and 20%.
  • Typical values for the roughness of TBC coatings are found in the range from 9 pm up to 16 pm. It should be pointed out at this point that the aforesaid parameters of the layers, as well as their chemical composition, can differ considerably from the previously cited examples in a specific case.
  • the required surface roughness can be achieved using different methods, with - analogous to classical sandblasting - abrasive blasting techniques, for example with fine corundum, shot peening or cut-wire peening with hard steel bodies, with rust-free steel bodies or with ceramic blasting bodies, being customary.
  • polishing apparatuses Two variants of polishing apparatuses are widely used for the carrying out of the vibropolishing, namely so-called round vibrators and tray vibrators.
  • a tray vibrator is an apparatus which substantially includes a polishing container, which includes corresponding polishing elements and which can be set into vibration by suitable devices.
  • the workpieces to be treated are, in the simplest case, placed into the polishing container such that the workpieces are polished by the polishing elements which behave overall under vibration in an analogous manner to a viscid liquid.
  • Partitioning slides can be provided which prevent adjacent workpieces from touching or damaging one another in the polishing container and an external attaching of the workpieces can also be provided.
  • a masking of specific surface regions of the workpiece with covers, can also provide a further protection such that only a partial smoothing of the workpiece is allowed and/or, for example, endangered edges are protected.
  • Damage of the previously described kind can admittedly be reduced by suitable masking of endangered surface regions.
  • this is only possible for those surface regions which do not have to be polished.
  • this method is very complex in practice since frequently more than one surface region has to be protected separately in each case by a suitable masking, which is associated with a complex installation or removal of the corresponding parts and is thus less efficient from an economic viewpoint.
  • a further substantial disadvantage is the fact that, in particular with rotationally asymmetrical workpieces such as turbine vanes for land-based applications or for airplane turbine engines, the known methods result in insufficient surface roughnesses and/or in particular in non-uniform ly polished regions, i.e. regions with non-uniform roughness on the surface of the workpiece.
  • the turbine vane Due to the asymmetrical mass distribution, for example of a turbine vane, the turbine vane will only rotate non- uniform ly between the polishing elements in the polishing container and the differently oriented surfaces of the turbine vane are acted upon by the polishing elements with different polishing pressures during polishing, which ultimately results in different regions of the surface having different surface roughnesses, and in a sufficiently high roughness not being reached at all at certain surfaces of the turbine vane. What was said above is also true in another respect for polishing methods in which the workpiece is externally fastened.
  • the previously described disadvantages do not only occur on the polishing of turbine vanes, for which the problems are explained here by way of example, but also occur generally in vibropolishing, in particular with rotationally asymmetrical workpieces.
  • US6817051 to Tanner discloses a vibropolishing apparatus for a workpiece which has a porous surface coating comprising a polishing container and a guide apparatus disposed in the container for guiding and holding the workpiece in the polishing container, the guide apparatus having first and second guide members which are spaced apart by at least one spacer and a holder for positioning and holding the workpiece between the guide members, the guide apparatus being formed and disposed in the polishing container so that it is freely movable, freely rotatable and can take any position relative to the polishing container while preventing the workpiece from contacting the polishing container during polishing.
  • the present invention therefore is directed to a surface treatment apparatus and in particular to a surface polishing apparatus at least partially overcoming the issues as mentioned above.
  • a fixture in which multiple substrates can be placed in such a manner that they come to lay in planes and that they are radially oriented, one end oriented to the center of a circle, another end radially extending away from the center, all substrates having the same distance to the center, constituting a fixture ring-
  • fixture rings in such a manner, that a number of them can be stacked to layered fixture rings, all fixture rings of the stack having the center on one axis, forming the center axis.
  • the stack of fixture rings resulting in a cylindrical stack.
  • fixture rings are formed by segments which can be disassembled.
  • the outer surface of the cylindrical stack is closed thereby masking the outer ends of the substrates to be polished.
  • the inner ends of the substrates to be polished are covered by an inner ring as provided by the fixture rings.
  • the outer segment comprises lower sockets basings formed by spacer sections and/or the cap segment comprises upper sockets basings formed by spacer sections to hold and shield the basis of turbine vanes mounted in between.
  • the inner segment or ring carries radial extensions formed to abut the tips of turbine vanes for protection.
  • the radial extensions have a base section connecting the extension to the inner ring at a tip section, formed to match the shape and curvature of the tips of the turbine vanes mounted in the segment like an extension of a turbine blade.
  • the segment comprises an outside segment arranged radially outward of the outer segment wherein the outer segment is profiled in such a matter that the basis turbine vanes can be placed on it with vanes extending radially outward and radially inward.
  • the inner segment is realized in a manner to shield the tips of the turbine vanes extending inward and the outside segment is realized in a matter to shield the tips of turbine vanes extending outward.
  • either the outside segment or the inside segment or both carries radial extensions formed to abut the tips of turbine vanes for protection.
  • the segments are made of thermoplastic polyurethane (TPU) material and/or derivatives.
  • TPU thermoplastic polyurethane
  • the cylindrical stack comprises a bottom ring, at least one fixture ring and a closing ring.
  • the bottom ring comprises at least two axles which vertically extend parallel to the central axis and which may be used to fix bottom ring and the closing ring together, thereby firmly sandwiching the at least one circular ring.
  • the at least one circular ring is composed of separatable segments, it is highly preferred to have at least two axles per segment, which penetrate through corresponding holes in the segments and thereby holding them in place to the ring.
  • Figure 1 shows a fixture ring according to the present invention
  • Figure 2 shows a disassembled segment where several segments put together form a fixture ring according to the present invention
  • Figure 3 shows a disassembled segment - similar to that shown in Figure 2 - according to a second embodiment of the present invention
  • Figure 4 shows a top view of an assembled segment according to Figure 3
  • Figure5 shows a disassembled segment according to a third embodiment of the present invention, similar to those shown in Figures 2 to 5
  • Figure 6 shows an assembled and disassembled arrangement of a turbine vane with a mounting shoe arrangement to be arranged in a fixture ring according to
  • Figure7 shows a disassembled segment arrangement according to a fourth embodiment of the present invention
  • Figure 8 shows a cut through an assembled cylindrical stack according to the present invention
  • Turbine vanes have a base body, with a blade on top. The end of this blade most distant to the base body is typically named tip of the blade.
  • Figure 1 shows a fixture ring 101 according to the present invention, built by seven segments 103, 105, 107, 109, 111 , 113, 115. In these segments placed are turbine vanes (shown with broken lines) which are oriented in such a way, that the base body is most distant to the center of the ring and the blade tips are closest to the center of the ring. The base bodies are masked by the outer ring of the fixture ring and the tip blades are covered by an inner ring. The rest of the blades are freely accessible from above as well as from below.
  • Figure 1 shows the fixture ring only partially loaded with turbine vanes, in particular only segments 103 and 105 are loaded.
  • FIG. 2 shows a disassembled segment 201 with a carrier segment 203 and a cap segment 221 . There are three turbine vanes loaded into the carrier segment, shown in broken lines. A fourth turbine vane is shown as well in broken lines to be loaded into the carrier segment 203.
  • the carrier segment 203 comprises an outer segment 205 and an inner segment 207 which when segments are assembled to a fixture ring form an outer ring and a inner ring. Outer segment 205 and inner segment 207 are fixed together by segment end plates 209 and 211. In order to increase the stability of carrier segment 203 two connection arms 213 and 215 are used to additionally stabilize outer segment 205 and inner segment 207.
  • the carrier segment 203 in addition comprises at least two holes 217 (in the figure 2 the second hole 217 cannot be seen as it is behind the turbine vanes already loaded onto the carrier segment). These holes may be used to allow axles of the bottom ring to penetrate through the segment 201 in order to correctly place the segment by kind of impaling it.
  • the carrier segment in addition comprises at least two thread holes 219 (in the figure 2 the second thread hole 219 cannot be seen as it is behind the turbine vanes already loaded onto the carrier segment). These thread holes are used to fix the cap segment 221 onto the carrier segment 203 with the help of screws 223 and 225.
  • the outer ring 205 of the carrier segment 203 is formed in such a way, that turbine vanes can be placed on it.
  • the profile may for example be a step profile in order to place the base body of the turbine vane on it.
  • the profile of the outer ring 205 is adapted to the shape of the base body of the turbine vane.
  • the inner ring 207 of the carrier segment 203 has mainly the function of shielding the blade tip. This may be an unstructured surface which the tips of the blades just touch when loaded onto the carrier segment 203.
  • the cap segment 221 when fixed to the carrier segment 203 has the task to firmly fix the turbine vanes loaded into the carrier segment 203. Therefore, the profile of the cap segment 221 is as well adapted to the shape of the base body of the turbine vane.
  • the cap segment 221 comprises holes 227 and 229 corresponding to the thread hole 219 of the carrier segment 203.
  • the cap segment 221 in addition comprises at least two holes 231 and 233. These holes may be used to allow axles of the bottom ring to penetrate through the segment 201 in order to correctly place the segment by kind of impaling it.
  • the turbine vane bodies are clamped in between carrier segment 203 and cap segment 221 and therefore firmly fix and as well completely masked.
  • the blade tips are masked by the inner ring 207 of the carrier segment 203.
  • the blades of the turbine vanes are fully accessible from the top as well as from the bottom and for example polishing material may reach the respective surfaces without any obstacle.
  • FIGS 3 and 4 show a second embodiment according to the present invention.
  • this segment 201 comprises also a carrier segment 203 and a cap segment 221 , both having several spacer sections 204, 222.
  • the carrier segment 203 they form lower socket areas 206 at the outer segment 205.
  • the cap segment 221 comprises spacer sections 222 to form upper socket areas 224.
  • the lower socket area 206 and the upper socket area 224 form a two-part socket to wrap the foot of the turbine blades when the carrier segment 203 and the cap segment 221 are assembled with the turbine blades mounted in between.
  • inner segment or inner ring 207 of the carrier segment 203 carries protection extensions 208 which extend radially in direction to the mounted turbine blades and preferably match the shape and curvature of the blade like an extension which becomes broader in an inward direction towards the inner ring.
  • a lower and an upper notch 210 and 226 can be formed to squeeze the foot of the blade into the lower and the upper socket spacing 206 and 224 when the carrier segment 203 and the cap segment 221 are mounted and fixed to each other.
  • additional thin walled shells 226 can be provided which protect the foot of the blades like an additional protective sock (figure 6). These two shells 226 are very thin and match the shape of the foot of the blade. They are preferably made of an elastic but strong material such as TPU or similar to allow for an elastic but very robust fixation of the turbine blades between the carrier segment 203 and the cap segment 221 .
  • Figure 7 shows a fourth embodiment of a segment 401 which allow for a double circle arrangement of blades within a carrier 403.
  • the carrier segment 03 comprises an outer segment forming acentral mounting ring 05 with lower socket areas 406, an inner segment ring 407 to protect the tips of the mounted blades extending radially inward, and an outside segment forming an outer segment ring 409 to protect the tips of the mounted blades extending radially outwards.
  • a cap segment 421 can be fixed to the segment 403 by screws.
  • the segments are preferably manufactured from a strong but still elastic material such as thermoplastic polyurethane (TPU) material and derivatives.
  • TPU thermoplastic polyurethane
  • Figure 8 shows a cut through an assembled cylindrical stack 301 according to the present invention.
  • the cylindrical stack 301 comprises a bottom ring 303, a first, second third and fourth fixture ring 305, 307, 309 and 311 as well as a closing ring 313.
  • the bottom ring 303 is completed with broken lines. This allows to show axels, such as for example 315 and 317 which allow to load the bottom ring 303 with segments and to align them to fixture rings.
  • the closing ring 313 is then put on top of the stack of bottom ring and fixture rings and fixed with screws.
  • a central axle is provided to which bottom ring as well as closing ring are connected via arms.
  • the whole stack may then be fixed to a vibration container and the setup may be used as tray system and/or rotatory system.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

La présente invention concerne un segment d'un dispositif de fixation, le dispositif de fixation étant constitué d'un certain nombre de tels segments agencés de sorte à former une bague de fixation, le segment comprenant un segment de support et un segment de capuchon.
PCT/EP2022/060780 2021-04-23 2022-04-22 Empilement cylindrique de bague de fixation pour le traitement de surface d'aubes de turbine WO2022223827A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CN202280030295.XA CN117203018A (zh) 2021-04-23 2022-04-22 用于涡轮机叶片表面处理的固定装置环的圆柱形堆叠物
KR1020237036091A KR20230169176A (ko) 2021-04-23 2022-04-22 터빈 베인의 표면 처리를 위한 고정구 링의 원통형 스택
EP22725403.4A EP4326486A1 (fr) 2021-04-23 2022-04-22 Empilement cylindrique de bague de fixation pour le traitement de surface d'aubes de turbine
JP2023564633A JP2024515716A (ja) 2021-04-23 2022-04-22 タービンベーンの表面処理用固定リングの円筒状積層体
US18/382,854 US20240051083A1 (en) 2021-04-23 2023-10-23 Cylindrical stack of fixture ring for surface treatment of turbine vanes

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102021002146 2021-04-23
DE102021002146.0 2021-04-23
DE102021002751 2021-05-27

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US18/382,854 Continuation US20240051083A1 (en) 2021-04-23 2023-10-23 Cylindrical stack of fixture ring for surface treatment of turbine vanes

Publications (1)

Publication Number Publication Date
WO2022223827A1 true WO2022223827A1 (fr) 2022-10-27

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WO (1) WO2022223827A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6817051B2 (en) 2002-08-27 2004-11-16 Sulzer Metco Ag Guide apparatus for a workpiece having a porous surface coating and a method for the polishing of such a workpiece
WO2007008972A1 (fr) * 2005-07-12 2007-01-18 Praxair S.T. Technology, Inc. Dispositif a utiliser dans une operation de revetement
WO2014143302A1 (fr) * 2013-03-15 2014-09-18 United Technologies Corporation Outil pour l'usinage par écoulement abrasif d'ensembles de surfaces portantes
WO2015027310A1 (fr) * 2013-08-28 2015-03-05 Mds Coating Technologies Corp. Outil de masquage de profil aérodynamique et procédé de polissage d'un profil aérodynamique
US20150075428A1 (en) * 2011-09-28 2015-03-19 Herakles Device for Loading Porous Substrates of Three-Dimensional Shape in Order to be Densified by Directed Flow Chemical Vapor Infiltration

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6817051B2 (en) 2002-08-27 2004-11-16 Sulzer Metco Ag Guide apparatus for a workpiece having a porous surface coating and a method for the polishing of such a workpiece
WO2007008972A1 (fr) * 2005-07-12 2007-01-18 Praxair S.T. Technology, Inc. Dispositif a utiliser dans une operation de revetement
US20150075428A1 (en) * 2011-09-28 2015-03-19 Herakles Device for Loading Porous Substrates of Three-Dimensional Shape in Order to be Densified by Directed Flow Chemical Vapor Infiltration
WO2014143302A1 (fr) * 2013-03-15 2014-09-18 United Technologies Corporation Outil pour l'usinage par écoulement abrasif d'ensembles de surfaces portantes
WO2015027310A1 (fr) * 2013-08-28 2015-03-05 Mds Coating Technologies Corp. Outil de masquage de profil aérodynamique et procédé de polissage d'un profil aérodynamique

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