EP4313479A1 - Procédé et dispositif d'usinage d'un arbre d'un appareil au niveau d'un point d'appui de l'arbre - Google Patents

Procédé et dispositif d'usinage d'un arbre d'un appareil au niveau d'un point d'appui de l'arbre

Info

Publication number
EP4313479A1
EP4313479A1 EP22709975.1A EP22709975A EP4313479A1 EP 4313479 A1 EP4313479 A1 EP 4313479A1 EP 22709975 A EP22709975 A EP 22709975A EP 4313479 A1 EP4313479 A1 EP 4313479A1
Authority
EP
European Patent Office
Prior art keywords
unit
shaft
bearing
machined
grinding
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
Application number
EP22709975.1A
Other languages
German (de)
English (en)
Inventor
Hubert HENNEBÖHL
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP4313479A1 publication Critical patent/EP4313479A1/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P6/00—Restoring or reconditioning objects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C3/00—Milling particular work; Special milling operations; Machines therefor
    • B23C3/02—Milling surfaces of revolution
    • B23C3/04—Milling surfaces of revolution while revolving the work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P6/00—Restoring or reconditioning objects
    • B23P6/002—Repairing turbine components, e.g. moving or stationary blades, rotors
    • B23P6/007—Repairing turbine components, e.g. moving or stationary blades, rotors using only additive methods, e.g. build-up welding
    • 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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/02—Frames; Beds; Carriages
    • 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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/06—Work supports, e.g. adjustable steadies
    • 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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/06—Work supports, e.g. adjustable steadies
    • B24B41/065—Steady rests
    • 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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/06—Work supports, e.g. adjustable steadies
    • B24B41/067—Work supports, e.g. adjustable steadies radially supporting workpieces
    • 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
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
    • B24B5/04—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding cylindrical surfaces externally
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • F03D80/50—Maintenance or repair
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/60—Shafts
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

Definitions

  • the invention relates to a method and a device for processing a shaft of a device at a bearing point at which the shaft is rotatably mounted on a bearing of the device that has to be replaced.
  • repair methods are already in use, with which an attempt is made to remedy the bearing damage of a generator in a wind turbine in the nacelle.
  • the defective shaft bearing arrangement is removed and the defective bearing point of the shaft is machined by means of material removal and material application units that are rotated automatically or manually around the shaft, as well as with the aid of a grinding unit.
  • This procedure is not optimal, since the equipment required for machining the shaft has to be moved around the shaft, which is stationary after the bearing has been removed and can no longer be moved. This results in deviations in the equipment from its respective optimal positioning for processing.
  • US-B-6 244 143 discloses a device for machining a shaft of a machine, with which a tool can be used to peel off material from the shaft.
  • the shaft which is mounted in its bearings, rotates.
  • GB-A-2 262 900 a shaft dressing machine is known which has a tool rotatable about the standing shaft. The shaft remains in its bearings.
  • US-A-2015/0135534 discloses a method for retrofitting a rotor load sensor system to a main shaft of a wind turbine that is mounted in its bearing.
  • EP-A-3 112 678 a further method for machining a main shaft of a wind turbine mounted in its bearing is known.
  • the object of the invention is to create a device that is improved in this respect and a method that is improved in this respect for machining a shaft of a device at a bearing point at which the shaft is rotatably mounted on a bearing of the device that is to be replaced.
  • the invention provides a method for machining th of a shaft of a device at a bearing point at which the shaft is rotatably mounted on a bearing of the device to be replaced, proposed, the method being provided with an attachable to the device Drive unit with a drive element that can be driven in rotation by a motor for coupling to one end of the shaft to be machined, a holding unit that can be attached to the device for a support bearing unit for supporting the shaft to be machined when it rotates with a remote bearing of the device, the holding unit for holding the support bearing unit is provided together with at least one or more or all of the following units: a material removal unit for removing material from the machined shaft at its bearing point, a material application unit for applying material to the bearing point of the shaft to be machined and a grinding unit for grinding down the material applied to the bearing point of the shaft to be machined, the support bearing unit, the material removal unit, the material application unit and the grinding unit being carried out by the drive unit Rotation of the shaft to be machined are operable
  • the drive unit can be arranged at that end of the shaft whose shaft bearing arrangement remains installed.
  • the drive unit advantageously has a frame which is firmly connected to the device and on which the motor of the drive unit and the drive element are arranged.
  • a holding unit is attached to the device on that side of the device where the bearing to be replaced is located, on which the various equipment is then attached in order to edit the bearing point of the shaft.
  • a support bearing unit can also be attached to the holding unit, which has at least one bearing block in order to support the shaft to be machined when the shaft bearing arrangement is removed and thus to hold it in a position in which the shaft to be machined is when it is arranged in the unit (e.g. generator) can rotate.
  • the support bearing unit is, so to speak, an auxiliary bearing unit.
  • the shaft bearing arrangement When the shaft bearing arrangement is removed, there is a free space between the bearing point of the shaft and the housing of the device, which is used according to the invention to accommodate the machining components of a material removal unit, a material application unit and a grinding unit. to drive.
  • material removal unit material is removed, for example, by machining at the bearing point of the shaft, in order, so to speak, to “clean” the defective bearing point and to prepare it for the application of new material.
  • This new material is applied using a material application unit, which can be a welding unit, for example.
  • a grinding unit the excess of the applied material is ground off and the bearing point is finally machined so that the new shaft bearing arrangement can then be used.
  • the shaft can be rotated during the entire machining process, so that, unlike in the prior art, the tools and components provided for machining no longer have to be moved relative to the stationary, non-rotating shaft around it , but rather these tools and components can stand still relative to the shaft, since the shaft is being rotated.
  • the invention can be used wherever bearing damage of a device with a comparatively fast rotating shaft has to be repaired, namely at the operating site of the device, which is then no longer taken to a specific location to replace a defective shaft bearing arrangement with a damaged bearing point on the shaft must become.
  • the invention can be used in particular (but not exclusively) in wind turbines and in particular also in offshore wind turbines, on ships, in general electrical machines (electric motors or generators), in transmissions and in compressors and turbines.
  • material is removed from the bearing point of the shaft to be machined by means of a material removal unit while rotating the shaft, material is applied to the bearing point of the shaft to be machined by means of a material application unit and the shaft to be machined is ground and/or polished at the bearing point by means of a grinding unit.
  • the shaft bearing arrangement to be replaced is first removed before the shaft is processed.
  • the holding unit can be attached to the side of the housing of the device (e.g. the generator).
  • Shaft bearing assemblies of the type in question typically have, in addition to the actual bearing, a so-called bearing shield that is mounted on the device housing from the outside (namely is screwed to the housing).
  • the holding unit can now be attached to the A direction housing, which in the simplest case consists of a disc or plate, which can be made in several parts, be available.
  • the various components and units required for machining the shaft according to the invention can then be attached to the holding unit.
  • the units and components provided for this bear processing according to the invention are dismantled in order to then be able to attach the end shield with a new shaft bearing arrangement.
  • an infeed unit can be attached to the holding unit, which has a tool slide that can be adjusted in the direction of the extension of the shaft to be machined and radially to it, to which the material removal unit, the material application unit and the grinding unit can be attached.
  • the holding unit has a large number of receptacles for the support bearing unit and/or the material removal unit and/or the material application unit and/or the grinding unit of the drive unit.
  • a suitable material removal unit is, for example, a unit for machining the shaft with a planer or with a milling tool, or a material erosion unit.
  • the material application unit can be, for example, an electric, arc, inert gas or laser welding unit or a flame spraying unit.
  • the grinding unit can have a grinding and/or polishing tool that can be driven in rotation.
  • the support bearing unit has at least one bearing block (for example in the form of a bezel) and/or if the support layer has pure lubricant and/or if the support bearing unit has a feed device for lubricant.
  • the support bearing unit has a guide unit for radially guiding and adjusting as well as fixing the at least one bearing block, the guide unit being attachable to the holding unit.
  • the drive unit expediently has an electric motor and a driven gear wheel that can be connected in a rotationally fixed manner to the shaft to be machined and a drive gear wheel that is arranged orthogonally thereto and can be driven by the electric motor, in particular in the form of a bevel gear wheel, which both form a (e.g. reduction gear) or part of a gear of type Due to the interposition of the transmission from the two mutually orthogonally aligned gear wheels, the installation height of the drive unit in the direction of the extension of the shaft is only small, so that this drive unit can be attached to the device even in cramped spaces.
  • Fig. 2 shows schematically the construction of the drive unit for the rotating drive of the generator shaft to be machined during the machining of the same
  • FIG. 3 shows a plan view of the end face of the housing of the generator with the shaft bearing arrangement removed to illustrate the function of the support bearing unit
  • Figs. 4 to 6 schematically show the situations in which the various tools and components for machining the bearing point of the shaft are arranged on an infeed unit, which in turn is arranged on a holding unit attached to the housing.
  • FIG. 1 shows schematically a nacelle 10 of a wind turbine whose rotor 12 drives the shaft 16 of a generator 18 via a gear 14 .
  • the generator 18 is therefore an example of a device 20 with a shaft 16 rotating relatively quickly a front shaft bearing arrangement 28, 30 has.
  • Fig. 2 shows the attachment of a drive unit 32 on the end face 24 of the generator 18.
  • a frame 38 of the drive unit 32 is being introduced, which has an electric motor 40 with a bevel gear 42 which is rotated by the electric motor 40 in rotation.
  • a driven gear 46 on a coupling element 44 of the drive unit 32 Coupling element 44 rotated.
  • the coupling element 44 is in example clamping to the end of the shaft 16 and thus non-rotatably verbun the.
  • the two gears 42, 46 form a gear 47.
  • FIGS. 3 to 6 The situation when machining the shaft 16 on the other end face 22 of the generator housing 26 is shown in FIGS. 3 to 6 shown.
  • the shaft 16 In the plan view of this end face 22 according to FIG. 3, the shaft 16 can be seen, which is arranged in a hole 48 in which the previously removed bearing 36 was located.
  • the space previously occupied by the bearing plate 50 (see FIG. 2) is used for the attachment of a multi-part holding unit 52 in this exemplary embodiment, which can have a plurality of indexing disk-shaped mounting plates 54, 56, 58.
  • a one-piece mounting plate can also be used.
  • the shaft 16 is supported by a support bearing unit 60 and held in such a position that it allows the shaft 16 to be rotated despite the shaft bearing arrangement 28 being removed.
  • the support bearing unit 60 has two bearing blocks 62 in the form of lunettes, for example, which are provided with lubricant and which can be displaced radially and can be adjusted in different radial positions.
  • the support bearing unit 60 has a guide unit 64 which is provided with two guide elements 66 which are displaceably arranged on, for example, the mounting plate 58 (see also the double arrows in FIG. 3).
  • the Figs. 4 to 6 show different situations in the machining of the shaft 16, specifically in order to repair the damage to the bearing point 68.
  • the housing 26 of the generator 18 is provided with the holding unit 52 on its front face 22 .
  • the here used mounting plates 54, 56 and 58 are provided with recordings to various tools and units required for machining the bearing point 68 of the shaft 16 and to hold components.
  • an infeed unit 70 is attached to the holding unit 52, which has a tool carriage 72, which can be moved manually and/or by motor in the direction of extension of the shaft 16 and orthogonally thereto (the latter at least in one dimension).
  • the infeed unit 70 is provided with a guide bar 73 with, for example, a motor 74 and an adjusting spindle 76, through which a transverse guide bar 78 can be moved, on which in turn the tool slide 72 can be moved longitudinally by actuating a handwheel 80 with spindle 82, for example.
  • a material removal unit 84 is attached to the tool carriage 72 and has a milling tool 86 in the form of a milling head that can be driven in rotation. This milling head 86 is moved by the infeed unit 70 until it reaches the intermediate space between the shaft 16 and the housing 26 of the generator 18 in order to now remove material at the bearing point 68 of the shaft 16 and thus to prepare the bearing point 68 for subsequent processing steps .
  • FIG. 5 shows the situation according to FIG. 4, but now a laser welding unit 88 is attached to the tool carriage 72 as a material application unit 90 .
  • material application unit 90 material can be applied to the (subsequent) bearing point 68 of the shaft 16, which material is then processed with the aid of a grinding unit 92 with regard to the surface, as shown for example in FIG.
  • the grinding unit 92 has, for example, a rotationally drivable grinding wheel 94, the diameter of which is adapted to the size of the distance between the shaft 16 and the generator housing 26 on the end face 22 of the generator.
  • Hal teech 52 is again taken from the end face 22 of the generator housing 26 till to now shield the new shaft bearing assembly 30 with associated bearing 50 on the end face 22 to attach.
  • the invention has been described above as an example using the replacement of bearings and the machining of the shaft of a generator. But you can also use the invention for the repair or replacement of the bearing Use the main or rotor shaft of a wind turbine.
  • the holding unit for the (auxiliary) support bearing unit and for the assembly of the shaft machining units is designed as a unit that is supported in the nacelle of the wind turbine (e.g. as a block or scaffold) on which the support bearing unit with its auxiliary bearings (e.g. bearing blocks with bezels).
  • the main shaft is driven by an auxiliary motor, for example, which drives the output shaft of the transmission leading to the generator, for example, for which purpose the generator should be separated from the transmission but does not necessarily have to be separated.
  • the auxiliary motor would have to act on the main shaft, which would also be possible in the case of wind turbines with gears (namely after separating the drive train between the main shaft and generator).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)

Abstract

Le procédé et le dispositif sont destinés à traiter un arbre (16) d'un appareil (20) qui supporte l'arbre (16) en rotation. Le dispositif est muni d'une unité d'entraînement (32) qui peut être fixée à l'appareil (20) et qui comporte un élément d'entraînement qui peut être entraîné en rotation par un moteur et qui est approprié pour être accouplé à une extrémité de l'arbre (16) à usiner. Le dispositif comprend également une unité de maintien (52), qui peut également être fixée à l'appareil (20), destinée à au moins une des unités suivantes : une unité palier support (60) destinée à supporter l'arbre (16) à usiner ; une unité d'enlèvement de matière (84) destinée à enlever de la matière de l'arbre à usiner au niveau de son point d'appui (68) ; une unité d'application de matière (90) destinée à appliquer une matière sur l'arbre (16) à usiner au niveau de son point d'appui (68) ; et une unité de meulage (92) destinée à meuler la matière appliquée au point d'appui (68) de l'arbre (16) à usiner. L'unité palier support (60), l'unité d'enlèvement de matière (84), l'unité d'application de matière (90) et l'unité de meulage (92) peuvent fonctionner pendant la rotation de l'arbre (16) à usiner au moyen de l'unité d'entraînement (32).
EP22709975.1A 2021-03-26 2022-02-14 Procédé et dispositif d'usinage d'un arbre d'un appareil au niveau d'un point d'appui de l'arbre Pending EP4313479A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP21165300 2021-03-26
PCT/EP2022/053515 WO2022199939A1 (fr) 2021-03-26 2022-02-14 Procédé et dispositif d'usinage d'un arbre d'un appareil au niveau d'un point d'appui de l'arbre

Publications (1)

Publication Number Publication Date
EP4313479A1 true EP4313479A1 (fr) 2024-02-07

Family

ID=75339408

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22709975.1A Pending EP4313479A1 (fr) 2021-03-26 2022-02-14 Procédé et dispositif d'usinage d'un arbre d'un appareil au niveau d'un point d'appui de l'arbre

Country Status (4)

Country Link
US (1) US20240157497A1 (fr)
EP (1) EP4313479A1 (fr)
CA (1) CA3213430A1 (fr)
WO (1) WO2022199939A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2262900B (en) 1991-12-19 1996-08-21 Silk Engineering Machine tool
US6244143B1 (en) 1999-11-29 2001-06-12 Thomas J. Reisdorph Lathe
US20150135534A1 (en) 2013-11-21 2015-05-21 General Electric Company System and method for uptower machining of a wind turbine
US9757821B2 (en) 2015-06-30 2017-09-12 General Electric Company System and method for in-situ resurfacing of a wind turbine main rotor shaft

Also Published As

Publication number Publication date
US20240157497A1 (en) 2024-05-16
CA3213430A1 (fr) 2022-09-29
WO2022199939A1 (fr) 2022-09-29

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