WO2017119358A1 - 動翼の取外方法、この方法を実行するための取外装置、この取外装置を備えるロータセット - Google Patents
動翼の取外方法、この方法を実行するための取外装置、この取外装置を備えるロータセット Download PDFInfo
- Publication number
- WO2017119358A1 WO2017119358A1 PCT/JP2016/088856 JP2016088856W WO2017119358A1 WO 2017119358 A1 WO2017119358 A1 WO 2017119358A1 JP 2016088856 W JP2016088856 W JP 2016088856W WO 2017119358 A1 WO2017119358 A1 WO 2017119358A1
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- WIPO (PCT)
- Prior art keywords
- blade
- moving
- bar
- front side
- rod
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/64—Mounting; Assembling; Disassembling of axial pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/005—Repairing methods or devices
-
- 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
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/02—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same
-
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
-
- 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
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/321—Rotors specially for elastic fluids for axial flow pumps for axial flow compressors
- F04D29/322—Blade mountings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/34—Blade mountings
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- 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
- F05D2230/70—Disassembly 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
- F05D2260/38—Retaining components in desired mutual position by a spring, i.e. spring loaded or biased towards a certain position
Definitions
- the present invention relates to a method for removing a moving blade from a rotating machine, a removal device for performing the method, and a rotor set including the removal device.
- An axial flow compressor which is a type of rotating machine, includes a rotor that rotates about an axis and a passenger compartment that covers the rotor.
- the rotor has a rotor shaft and a plurality of moving blade rows attached to the rotor shaft. Each moving blade row is arranged upstream of any one of the plurality of stationary blade rows.
- the moving blade row is composed of a plurality of moving blades arranged in the circumferential direction with respect to the axis.
- Patent Document 1 discloses the above axial flow compressor.
- the rotor shaft of this axial flow compressor has a disk for each of a plurality of blade rows. Each of the plurality of disks has a disk shape with the axis as the center.
- the rotor shaft is configured by stacking a plurality of disks in the axial direction.
- the moving blade includes a blade body extending in the radial direction with respect to the axis to form an airfoil, and a blade root provided on the radially inner side of the blade body.
- the disk is formed with a blade root groove that is recessed from the radially outer side toward the radially inner side and extends in a direction having an axial component to insert the blade root.
- the blade root of the moving blade may stick to the blade root groove after long-time operation. For this reason, when inspecting or repairing the rotating machine, it may be difficult to remove the blade from the blade root groove without damaging the blade.
- an object of the present invention is to provide a technique capable of easily removing a moving blade from a blade root groove without damaging the moving blade.
- An apparatus for removing a moving blade as one aspect according to the invention for achieving the above object is as follows: A base that is immovably restrained in the first direction; a push bar that is capable of projecting to the front side from the front surface of the base that faces the front side that is one side in the first direction; A bar moving mechanism that moves to the front side; and a bar guide that is attached to the base and guides the movement of the push bar by the bar moving mechanism in a second direction that forms an acute angle with respect to the first direction.
- the disk to which the moving blade is attached has a disk shape with the axis as the center.
- the disk is formed with a blade root groove that is recessed from the radially outer side to the radially inner side with respect to the axial line and extends in an inclined direction inclined with respect to the axial line.
- the blade root of the moving blade is in this blade root groove.
- the rotor shaft is configured by laminating a plurality of disks in the axial direction.
- the first direction of the removal device is made to coincide with the direction
- the second direction of the removal device is made to coincide with the inclination direction.
- a typical example of the base that is restrained so as not to move in the first direction is that the base has a front surface that is a vertical surface in the first direction.
- the base is provided with the rod moving mechanism, a frame to which the rod guide is attached, and a movement restricting mechanism for restricting movement of the frame in the first direction. You may have.
- the removal device has a movement restraining mechanism, the movement of the base including the frame in the first direction can be restrained regardless of the size and shape of the frame.
- the movement restraining mechanism has a pressing member at least partially disposed on the front side or the rear side opposite to the front side from the frame. Also good.
- the movement of the base including the frame in the first direction can be restricted by disposing at least a part of the pressing member on the front side or the rear side of the frame.
- the base is arranged in the first direction and the second direction in addition to the first movement restraining mechanism which is the movement restraining mechanism.
- the arc surface of the base is brought into contact with the outer peripheral surface of the disc or rotor shaft so that the radial direction and the third direction with respect to the disc or rotor shaft coincide with each other.
- the base cannot be moved to one side in the third direction with respect to the disk or the rotor shaft.
- the movement restraining mechanism may include a member separation mechanism that separates the pressing member in the first direction with respect to the frame.
- the pressing member moves in the first direction with respect to the frame by the member separation mechanism, the movement of the base including the frame in the first direction can be easily restrained.
- the bar guide may have a guide hole that penetrates in the second direction and is capable of sliding contact with the push bar.
- the bar guide may be detachable from the base. In this case, you may provide the fixing tool which fixes the said rod guide to the said base.
- the removal device can regulate the movement of the push bar in each direction perpendicular to the second direction.
- the inclination direction with respect to the axis may vary depending on the disc. For this reason, if the bar guide can be attached to and detached from the base, the bar guide can be changed according to the disk, so that the versatility of the detaching device can be enhanced.
- the rod moving mechanism has a taper forming body formed with a taper surface facing the front side, and the taper surface of the taper forming body is the push rod.
- the push rod may be moved to the front side by moving while contacting a rear end surface opposite to the front side.
- the rod moving mechanism includes a taper forming body that is inclined with respect to a virtual plane perpendicular to the first direction and has a tapered surface facing the front side.
- the taper forming body is relatively in a direction in which the virtual surface is widened with respect to the rear end surface while the tapered surface is in contact with the rear end surface of the push rod opposite to the front side.
- the base may be provided so as to be movable.
- the push rod can be moved to the front side by moving the taper forming body. Therefore, in the said removal apparatus, a moving blade can be moved, without applying an impact load to a moving blade.
- the rod moving mechanism has a rotation center axis
- the taper formation body is attached to the rotation center axis so as to be rotatable about the rotation center axis.
- the tapered surface may extend in a circumferential direction with respect to the rotation center axis.
- the taper forming body can be made smaller than when the tapered surface extends linearly.
- the taper forming body extends in a radial direction with respect to the rotation center axis from a rotation plate rotating around the rotation center axis and an outer periphery of the rotation plate. And the tapered surface may be formed on the rotating plate.
- the handle is operated to rotate the taper forming body.
- the distance from the rotation center axis serving as the fulcrum to the handle serving as the power point is longer than the distance from the rotation center axis serving as the fulcrum to the tapered surface serving as the action point. Therefore, in the said removal apparatus, a taper formation body can be rotated with a small force. In other words, in the removal device, the push rod can be moved to the front side with a small force.
- the rod moving mechanism is provided on the base, a male screw that contacts a rear end surface of the push rod opposite to the front side, and the male There may be formed a female screw into which the screw can be screwed and a screw hole extending in the first direction.
- the push rod can be moved to the front side by screwing the male screw into the screw hole. Therefore, in the said removal apparatus, a moving blade can be moved, without applying an impact load to a moving blade.
- the rod moving mechanism may include an actuator that generates a force for moving the push rod to the front side.
- the push rod can be moved by driving the actuator.
- the rotor set as one aspect according to the invention for achieving the above object is The blade removal device according to any one of the above, a rotor shaft, and a plurality of blades attached to an outer peripheral side of the rotor shaft, wherein the blade extends in a radial direction with respect to the rotor shaft.
- a blade body having a shape, and a blade root provided on the radially inner side of the blade body, the rotor shaft being recessed from the radially outer side toward the radially inner side, and the rotor shaft extending
- a blade root groove into which the blade root is inserted is formed extending in an inclination direction that forms an acute angle with respect to the axial direction, and an angle formed by the second direction with respect to the first direction is determined by the inclination direction with respect to the axial direction. It matches the angle formed.
- the rod guide includes the blade removing device having the guide hole, a rotor shaft, and a plurality of blades attached to the outer peripheral side of the rotor shaft, and the blade has a diameter with respect to the rotor shaft.
- a blade body extending in the direction to form an airfoil, and a blade root provided on the radially inner side of the blade body, the rotor shaft being recessed from the radially outer side toward the radially inner side, A blade root groove into which the blade root is inserted is formed extending in an inclined direction that forms an acute angle with respect to an axial direction in which the rotor shaft extends, and an angle formed by the second direction with respect to the first direction is the axial direction.
- the removal device has a second rod guide in addition to the first rod guide which is the rod guide, and the second rod guide is the first rod guide.
- a second guide hole having a shape different from the shape of the guide hole.
- that the shape of the guide hole is different includes both that the cross-sectional shape perpendicular to the penetration direction of the guide hole is different and that the second direction that is the penetration direction of the guide hole is different from the first direction. .
- the inclination direction with respect to the axis may vary depending on the disc.
- the shape of the end face of the blade root may vary depending on the disk.
- a method for removing a moving blade as one aspect according to the invention for achieving the above object is as follows: In the method for removing the moving blade attached to the outer peripheral side of the rotor shaft, the moving blade is provided on the radially inner side of the blade body extending in the radial direction with respect to the rotor shaft to form an airfoil.
- a blade root that is recessed from the radially outer side toward the radially inner side and extends in an inclined direction that forms an acute angle with respect to an axial direction in which the rotor shaft extends, and the blade root A blade root groove into which is inserted, and a base that is immovably restrained in the first direction; and a push rod that protrudes forward from the front surface of the base facing the front side that is one side of the first direction.
- a bar moving mechanism that is provided on the base and moves the push bar to the front side; and a movement of the push bar by the bar moving mechanism that is attached to the base and forms an acute angle with respect to the first direction.
- a rod guide that guides in two directions.
- a preparatory step of preparing an apparatus bringing the front surface of the base into contact with an axial end surface facing the axial direction of the rotor shaft; and causing the front end surface of the push rod and the blade root to face each other;
- a stick moving step is
- the preparing step includes a plurality of bar guides that penetrate the second direction and have guide holes of different shapes, and push rods corresponding to the plurality of bar guides. Selection of a bar guide preparation step to be prepared and a bar guide having a guide hole corresponding to the shape of the blade root, and a push bar corresponding to the selected bar guide are selected from the plurality of bar guides A step of attaching the rod guide selected in the selection step to the base, and a step of attaching the push rod selected in the selection step along the rod guide.
- the base of the removal device prepared in the preparation step is provided with the rod moving mechanism, the frame to which the rod guide is attached, and the frame A pressing member that is at least partially disposed on the front side or a rear side opposite to the front side, and in the arranging step, the pressing member is arranged on the front side or the rear side of the frame, and the rotor You may make the said pressing member contact the axial direction end surface which faces the said axial direction with an axis
- the base of the removal device prepared in the preparation step is provided with the rod moving mechanism and the frame to which the rod guide is attached; A pressing member that is at least partially disposed on the front side or the rear side opposite to the front side of the frame, and a member separation mechanism that separates the pressing member in the first direction with respect to the frame.
- the pressing member may be moved in the first direction by the member separation mechanism, and the front surface of the base may be brought into contact with an axial end surface facing the axial direction on the rotor shaft.
- the rod moving mechanism in the removal device prepared in the preparation step has a taper forming body in which a tapered surface facing the front side is formed,
- the push rod may be moved to the front side by moving the taper surface of the taper forming body in contact with a rear end surface opposite to the front side of the push rod.
- the rod moving mechanism in the removal device prepared in the preparation step has a rotation center axis, and the taper forming body is attached to the rotation center axis so as to be rotatable around the rotation center axis.
- the taper surface extends in a circumferential direction with respect to the rotation center axis, and in the rod moving step, the taper forming body may be rotated about the rotation center axis.
- the rod moving mechanism in the removal device prepared in the preparation step is provided in the base, and a screw hole in which a female screw is formed; A male screw that can be screwed into the female screw in the screw hole, and in the rod moving step, the male screw may be rotated to move the push rod to the front side.
- the moving blade can be easily removed from the blade root groove without damaging the moving blade.
- FIG. 6 is a sectional view taken along line VI-VI in FIG. 5. It is a VII arrow line view in FIG. It is a figure which shows the taper formation body in one Embodiment which concerns on this invention.
- (A) of the same figure is a front view of a taper formation body
- (B) of the same figure is a B arrow directional view in (A) of the same figure.
- the rotary machine of this embodiment is a gas turbine compressor.
- the gas turbine 1 includes a compressor 30 that compresses air A, a combustor 20 that generates combustion gas G by burning fuel F in the air A compressed by the compressor 30, and And a turbine 10 driven by combustion gas G.
- the compressor 30 includes a compressor rotor 31 that rotates about an axis Ar, a compressor casing 35 that covers the compressor rotor 31, and a plurality of stationary blade rows 37.
- the turbine 10 includes a turbine rotor 11 that rotates about an axis Ar, a turbine casing 15 that covers the turbine rotor 11, and a plurality of stationary blade rows 17.
- the compressor rotor 31 and the turbine rotor 11 are located on the same axis Ar and are connected to each other to form the gas turbine rotor 2.
- a rotor of a generator GEN is connected to the gas turbine rotor 2.
- the compressor casing 35 and the turbine casing 15 are connected to each other to form the gas turbine casing 5.
- the direction in which the axis Ar extends is referred to as the axial direction Da
- the circumferential direction around the axis Ar is simply referred to as the circumferential direction Dc
- the direction perpendicular to the axis Ar is referred to as the radial direction Dr.
- the compressor 30 side is defined as the upstream side Dau and the opposite side as the downstream side Dad with reference to the turbine 10.
- the side closer to the axis Ar in the radial direction Dr is referred to as a radial inner side Dri, and the opposite side is referred to as a radial outer side Dro.
- the turbine rotor 11 has a rotor shaft 12 extending in the axial direction Da around the axis Ar, and a plurality of blade rows 13 attached to the rotor shaft 12.
- the plurality of blade rows 13 are arranged in the axial direction Da.
- Each rotor blade row 13 is composed of a plurality of rotor blades arranged in the circumferential direction Dc.
- a stationary blade row 17 is arranged on each upstream side Dau of the plurality of blade rows 13.
- Each stationary blade row 17 is provided inside the turbine casing 15.
- Each stationary blade row 17 is configured by a plurality of stationary blades arranged in the circumferential direction Dc.
- the compressor rotor 31 has a rotor shaft 32 extending in the axial direction Da around the axis Ar, and a plurality of blade rows 33 attached to the rotor shaft 32.
- the plurality of blade rows 33 are arranged in the axial direction Da.
- Each rotor blade row 33 is composed of a plurality of rotor blades 60 arranged in the circumferential direction Dc.
- a stationary blade row 37 is disposed on each downstream side Dad of the plurality of blade rows 33.
- Each stationary blade row 37 is provided inside the compressor casing 35.
- Each stationary blade row 37 is configured by a plurality of stationary blades arranged in the circumferential direction Dc.
- An annular space between the outer peripheral side of the rotor shaft 32 and the inner peripheral side of the compressor casing 35 forms an air compression passage 39 that is compressed while air flows.
- the rotor shaft 32 of the compressor 30 has a disk 40 for each of a plurality of blade rows 33 as shown in FIG.
- Each of the plurality of disks 40 has a disk shape with the axis Ar as the center.
- the rotor shaft 32 is configured by stacking a plurality of disks 40 in the axial direction Da.
- the moving blade 60 includes a blade body 61 that extends in the radial direction with respect to the axis Ar to form an airfoil, and a blade root 62 provided on the radially inner side Dri of the blade body 61.
- the disk-shaped disc 40 is formed with a rotor blade mounting portion 41, an arm 53, and a recess 55.
- the rotor blade attachment portion 41 forms a portion of the disk 40 on the radially outer side Dro.
- the arm 53 includes an upstream arm 53u that protrudes from the position of the upstream side Dau of the moving blade mounting portion 41 to the upstream side Dau, and a radially inner side Dri of the moving blade mounting portion 41.
- a downstream arm 53d protruding from the position of the downstream side Dad of the moving blade mounting portion 41 to the downstream side Dad.
- Both the upstream arm 53u and the downstream arm 53d extend in the circumferential direction Dc and have an annular shape centering on the axis Ar.
- the recess 55 includes an upstream recess 55u recessed in the downstream Dad relative to the upstream arm 53u at the radially inner side Dri of the upstream arm 53u, and a downstream arm 53d at the radially inner Dri of the downstream arm 53d. On the other hand, it has a downstream recess 55d that is relatively recessed in the upstream Dau. Both the upstream recess 55u and the downstream recess 55d extend in the circumferential direction Dc and have an annular shape centered on the axis Ar.
- the blade attachment portion 41 is formed with a plurality of blade root grooves 45 that are recessed from the radially outer side Dro toward the radially inner side Dri and extending in a direction including the axial Da component. In each blade root groove 45, the blade root 62 of the moving blade 60 enters.
- the rotor blade mounting portion 41 is further formed with a cylindrical pin hole 49 that is recessed from the groove bottom surface 48 of the blade root groove 45 to the radially inner side Dri.
- a cylindrical pin 58 and a spring 59 that urges the pin 58 in a direction protruding from the pin hole 49 are arranged in the pin hole 49.
- a pin hole 69 that is recessed from the radially inner side Dri to the radially outer side Dro is formed in the blade root 62 of the moving blade 60.
- the pin 58 protruding from the pin hole 49 of the disk 40 enters the pin hole 69.
- the moving blade mounting portion 41 of the disk 40 has a gas path surface 42 facing the radially outer side Dro, a front end surface 43 facing the upstream side Dau, and a rear end surface 44 facing the downstream side Dad. And are formed.
- the gas path surface 42 defines a part of the edge of the radially inner side Dri of the annular air compression flow path 39.
- the front end surface 43 and the rear end surface 44 are surfaces that are substantially perpendicular to the axis Ar.
- the plurality of blade root grooves 45 are recessed from the gas path surface 42 to the radially inner side Dri at intervals in the circumferential direction Dc.
- the blade root groove 45 extends from the rear end surface 44 to the front end surface 43 of the disk 40 in the inclination direction Di with respect to the axis Ar.
- the inclination direction Di is a direction that forms an acute angle with respect to the axial direction Da.
- the blade root groove 45 includes a first groove portion 46 whose groove width in the circumferential direction Dc is the first groove width, and a second groove portion 47 whose groove width in the circumferential direction Dc is wider than the first groove width.
- the second groove portion 47 is located on the radially inner side Dri of the first groove portion 46 and is connected to the first groove portion 46.
- the blade root 62 of the rotor blade 60 includes a gas path surface 63 facing the radially outer side Dro, a bottom surface 68 facing the radially inner side Dri, a front end surface 64 facing the upstream side Dau, and a rear end surface 65 facing the downstream side Dad. Is formed.
- the gas path surface 63 defines a portion of the edge of the radially inner side Dri of the annular air compression flow path 39.
- the blade body 61 of the rotor blade 60 extends from the gas path surface 63 to the radially outer side Dro.
- the blade root 62 has a first blade root portion 66 whose width in the circumferential direction Dc is the first blade root width, and a second blade root portion whose width in the circumferential direction Dc is a second blade root width wider than the first blade root width. 67.
- the second blade root portion 67 is located on the radially inner side Dri of the first blade root portion 66 and is connected to the first blade root portion 66.
- a gas path surface 63 of the blade root 62 is formed in the first blade root portion 66.
- the first blade root width dimension is slightly smaller than the first groove width dimension described above, it is substantially the same as the first groove width dimension.
- the second blade root width dimension is slightly smaller than the second groove width dimension described above, it is substantially the same as the second groove width dimension.
- the blade root 62 does not come out of the blade root groove 45 even if centrifugal force acts on the rotor blade 60.
- the blade root 62 may adhere to the blade root groove 45.
- a bottom surface 68 of the blade root 62 is formed in the second blade root portion 67.
- Both the front end face 64 and the rear end face 65 of the blade root 62 are formed in the first blade root portion 66 and the second blade root portion 67.
- the pin hole 69 of the moving blade 60 is recessed from the bottom surface 68 of the moving blade 60 toward the radially outer side Dro.
- the pin 58 entering the pin hole 69 serves to regulate the movement of the moving blade 60 in the inclined direction Di in which the blade root groove 45 extends.
- the front end face 64 of the blade root 62 is substantially flush with the front end face 43 of the disk 40. Further, the rear end surface 65 of the blade root 62 is substantially flush with the rear end surface 44 of the disk 40. For this reason, in this state, the front end face 64 and the rear end face 65 of the blade root 62 are substantially perpendicular to the axis Ar.
- the removal device of this embodiment is a device for removing the moving blade 60 from the blade root groove 45 of the disk 40 described above.
- the detaching apparatus 100 of the present embodiment includes a base 101 that is immovably restrained in the first Z direction and a front side Zf that is one side in the Z direction from the base 101. And a bar moving mechanism 150 that moves the push bar 130 to the front side Zf, and a bar guide 140 that guides the moving direction of the push bar 130.
- the other side in the Z direction that is, the side opposite to the front side Zf is referred to as a rear side Zr.
- a direction perpendicular to the Z direction and the X direction is defined as a Y direction
- a direction perpendicular to the Z direction and the Y direction is defined as an X direction.
- the base 101 is provided with a rod moving mechanism 150, and includes a frame 110 to which a rod guide 140 is attached, and a movement restraining mechanism 120 that restrains the movement of the frame 110 in the Z direction.
- the frame 110 includes a front wall plate 111 and a rear wall plate 115 that extend in a direction perpendicular to the Z direction, and a connecting portion 119 that connects the front wall plate 111 and the rear wall plate 115.
- the rear wall plate 115 is disposed with a space on the rear side Zr with respect to the front wall plate 111.
- the connecting portion 119 connects the ( ⁇ ) Y side edge of the front wall plate 111 and the ( ⁇ ) Y side edge of the rear wall plate 115.
- the surface facing the ( ⁇ ) Y side of the connecting portion 119 is an arcuate arc surface 119a centered on a virtual axis that is located on the ( ⁇ ) Y side of the connecting portion 119 and extends in the Z direction.
- a surface of the front wall plate 111 facing the front side Zf forms a front surface 112 of the frame 110.
- the surface of the rear wall plate 115 facing the rear side Zr forms the rear surface 116 of the frame 110 and the rear surface of the base 101.
- the front surface 112 and the rear surface 116 of the frame 110 are surfaces parallel to each other and perpendicular to the Z direction.
- the movement restraining mechanism 120 includes a pressing member 121, a part of which is disposed on the front side Zf of the front surface 112 of the frame 110, and a member separation mechanism 127 that separates the pressing member 121 from the frame 110 to the front side Zf.
- the pressing member 121 includes a main plate disposed on the front side Zf of the front surface 112 of the frame 110, a side plate 124 extending from the ( ⁇ ) X side end of the main plate 122 to the rear side Zr, and each side plate. And a detachment prevention plate 125 extending in the X direction from the end of the rear side Zr 124.
- the main plate 122 is disposed in parallel with the front surface 112 of the frame 110.
- the width of the main plate 122 in the X direction is substantially the same as the width of the frame 110 in the X direction.
- the (+) X side detachment prevention plate 125 extends from the end of the rear side Zr of the (+) X side plate 124 to the ( ⁇ ) X side.
- the ( ⁇ ) X side detachment prevention plate 125 extends from the end of the rear side Zr of the ( ⁇ ) X side plate 124 to the (+) X side.
- Each detachment prevention plate 125 faces the surface facing the rear side Zr in the front wall plate 111 in the Z direction.
- the distance dimension in the Z direction between the main plate 122 and each detachment prevention plate 125 is larger than the width dimension in the Z direction of the front wall plate 111, in other words, the thickness dimension of the front wall plate 111. For this reason, although the pressing member 121 can move in the Z direction with respect to the front wall plate 111, the movement range thereof is limited.
- the member separation mechanism 127 includes a separation bolt 128 and an operation rod 129 for rotating the separation bolt 128.
- a screw hole 113 penetrating in the Z direction is formed in the front wall plate 111.
- the male screw portion of the separating bolt 128 is screwed into the screw hole 113.
- the operation rod 129 is attached to the bolt head of the separating bolt 128.
- the tip of the separation bolt 128 is in contact with the main plate 122 of the pressing member 121.
- the rod guide 140 includes a main body portion 141 and a flange portion 145 projecting from the outer periphery of the main body portion 141 to the outer peripheral side.
- the front wall plate 111 of the frame 110 is formed with a guide mounting hole 114 into which the main body 141 of the bar guide 140 is inserted.
- the main body 141 of the bar guide 140 is inserted into the guide mounting hole 114.
- the flange portion 145 of the bar guide 140 is fixed to the front wall plate 111 of the frame 110 by a screw 146 as a fixture.
- a guide hole 142 penetrating in the U direction (second direction) forming an acute angle with respect to the Z direction (first direction) is formed in the main body 141 of the bar guide 140.
- the push rod 130 has a groove insertion portion 132, a trunk portion 136, and a tail portion 137.
- the push rod 130 has a rod shape.
- the first end side of the push rod 130 forms a groove insertion portion 132.
- a second end side opposite to the first end side of the push rod 130 forms a tail portion 137.
- a body portion 136 is formed between the groove insertion portion 132 and the tail portion 137.
- the body part 136 is inserted into the guide hole 142 of the bar guide 140.
- the outer peripheral surface of the body portion 136 is in contact with the inner peripheral surface of the guide hole 142.
- the cross-sectional shape of the groove insertion portion 132 in the plane perpendicular to the Z direction corresponds to the cross-sectional shape perpendicular to the axial direction Da of the blade root 62. Therefore, the groove insertion portion 132 includes a first groove insertion portion 133 whose width in the X direction perpendicular to the Z direction is the first width, and a second groove insertion whose width in the X direction is a second width wider than the first width. Part 134.
- the second groove insertion portion 134 is located on the ( ⁇ ) Y side of the first groove insertion portion 133.
- the first width is slightly narrower than the aforementioned first blade root width.
- the second width is slightly narrower than the aforementioned second blade root width.
- the surface facing the first end side forms a pressing surface 135 in contact with the end surface of the blade root 62.
- the pressing surface 135 is a surface perpendicular to the Z direction and is parallel to the front surface 123 of the base 101.
- the cross-sectional shape perpendicular to the Y direction of the tail 137 forms a semicircular shape that is convex to the rear side Zr. Therefore, the rear end surface 138 of the push rod 130 has an arc shape.
- the rod moving mechanism 150 includes a rotation center shaft 151 extending in the Z direction and a taper forming body 152 that rotates about the rotation center shaft 151.
- a first end of the rotation center shaft 151 is supported by the front wall plate 111 of the frame 110, and a second end of the rotation center shaft 151 is supported by the rear wall plate 115 of the frame 110.
- the taper forming body 152 includes a rotating plate 153 and a handle 155 provided on the outer periphery of the rotating plate 153.
- the rotating plate 153 has an arc shape in which a part of a disk centering on the rotation center axis 151 is cut out.
- the rotating plate 153 is provided so as to be rotatable about the rotation center shaft 151.
- the rotating plate 153 is formed with a tapered surface 154 that is inclined in a plane perpendicular to the Z direction and faces the front side Zf. As shown in FIGS. 8 and 10, the tapered surface 154 extends in the circumferential direction with respect to the rotation center axis 151 and is formed in a region R having a predetermined angle with respect to the rotation center axis 151. The tapered surface 154 contacts the rear end surface 138 of the push rod 130.
- 8A is a front view of the taper forming body 152
- FIG. 8B is a view taken in the direction of arrow B in FIG. 8A.
- the removal device 100 described above is prepared (S1: preparation step).
- the plurality of disks 40 constituting the rotor shaft 32 of the compressor 30 have slightly different directions in which the blade root grooves 45 extend between the disks 40, and the sizes of the blade root grooves 45 are also slightly different. There is.
- the blade root groove 45 of the disk 40 hereinafter referred to as the target disk 40
- the target rotor blade 60 to which the moving blade 60 to be removed
- the push rod 130 corresponding to the selected rod guide 140 is selected from the plurality of push rods 130 (S1b: selection step).
- the rod guide 140 corresponding to the blade root groove 45 of the disk 40 is such that the angle in the U direction in which the guide hole 142 extends with respect to the Z direction is the blade root groove with respect to the axis Ar.
- 45 is a bar guide 140 that matches the angle of the inclination direction Di in which 45 extends.
- the push rod 130 corresponding to the selected rod guide 140 is that the barrel portion 136 of the push rod 130 can be inserted into the guide hole 142 of the rod guide 140 and the outer circumferential surface of the barrel portion 136 is the inner circumferential surface of the guide hole 142.
- the rotor set is configured by including one or more disks 40, the target moving blade 60, and the removing device 100.
- the base 101 of the removal device 100 is arranged so that the blade root 62 of the target moving blade 60 and the pressing surface 135 of the push rod 130 face each other (S2: arrangement step).
- this arrangement step (S2) first, the base 101 of the removal device 100 is arranged between the target disk 40 and the disk 40 adjacent to the target disk 40 in the axial direction Da (S2a: provisional arrangement). Process). Specifically, for example, as shown in FIGS. 5, 7, and 10, the base 101 is disposed between the target disk 40 and the upstream Dau disk 40 adjacent to the target disk 40.
- the front surface 123 of the base 101 faces the front end surface 43 of the target disk 40, and the front end surface 64 of the blade root 62 of the target moving blade 60 and the pressing surface 135 of the push rod 130 face each other. Furthermore, the arc surface 119 a of the base 101 is arranged so as to contact the outer peripheral surface of the disk 40.
- the base 101 of the removal device 100 is restrained so as not to move in the ( ⁇ ) Y direction.
- This ( ⁇ ) Y direction is the radial inner side Dri of the target disk 40 in this state.
- step (S 2) the operation rod 129 of the member separation mechanism 127 is operated to screw the separation bolt 128 of the member separation mechanism 127 into the screw hole 113 of the front wall plate 111.
- the separation bolt 128 is screwed into the screw hole 113
- the pressing member 121 is pushed to the front side Zf by the separation bolt 128, and the main plate 122 of the pressing member 121 moves to the front side Zf with respect to the frame 110, It contacts the front end surface 43 of the target disk 40.
- the separation bolt 128 is further screwed into the screw hole 113, and the main plate 122 of the pressing member 121 is brought into close contact with the front end surface 43 of the target disk 40.
- the front surface 123 of the base is brought into close contact with the front end surface 43 of the target disk 40.
- the rear surface 116 of the base 101 is in close contact with the rear end surface 44 of the upstream Dau disk 40.
- the base 101 of the removal apparatus 100 is restrained so as not to move in the Z direction with respect to the target disk 40 (S2b: main placement step).
- the target moving blade 60 is renewed. It is preferable to finely adjust the position of the base 101 of the removing device 100 so that the front end face 64 of the blade root 62 and the pressing surface 135 of the push rod 130 face each other. The arrangement step (S2) is thus completed.
- the blade root 62 of the target moving blade 60 and the pressing surface 135 of the push rod 130 face each other.
- the Z direction in the detaching apparatus 100 and the axial direction Da of the disk 40 coincide with each other, and the U direction in the detaching apparatus 100 and the tilt direction Di of the disk 40 coincide with each other.
- the Y direction in the detaching apparatus 100 and the radial direction Dr of the disk 40 coincide, and the X direction in the detaching apparatus 100 and the circumferential direction Dc of the disk 40 substantially coincide.
- the push rod 130 is moved to the front side Zf by the rod moving mechanism 150 (S3: rod moving step).
- the handle 155 of the taper forming body 152 is operated to rotate the taper forming body 152 around the rotation center axis 151.
- the taper surface 154 formed on the taper forming body 152 also rotates around the rotation center axis 151.
- the rear end surface 138 of the push rod 130 is in contact with the tapered surface 154. For this reason, when the taper surface 154 rotates, the contact position with the push rod 130 in the taper surface 154 changes as shown in FIG.
- the push rod 130 is pushed out to the front side Zf in the Z direction by the taper forming body 152. Since the movement direction of the push rod 130 is regulated by the rod guide 140 in the U direction, the push rod 130 moves to the front side in the U direction.
- the groove insertion portion 132 of the push rod 130 protrudes from the front surface 123 of the base 101, and the pressing surface 135 of the push rod 130 forms the blade root 62 of the moving blade 60 to be removed. It contacts the front end face 64.
- the handle 155 of the taper forming body 152 When the handle 155 of the taper forming body 152 is further operated to move the push rod 130 forward in the U direction, the groove insertion portion 132 of the push rod 130 enters the blade root groove 45 of the target disk 40. In this process, the target moving blade 60 moves to the front side (downstream side) in the tilt direction Di.
- the moving amount of the moving blade 60 in the inclination direction Di is equal to or larger than the outer diameter of the pin 58 (see FIG. 2). For this reason, the pin 58 is cut by the movement of the target moving blade 60.
- the moving blade 60 that can be easily moved in the inclined direction Di is further moved in the inclined direction Di, and the blade root 62 of the moving blade 60 is taken out from the blade root groove 45 (S4: moving blade extraction step).
- S4 moving blade extraction step
- the removal of the target moving blade 60 is completed.
- other moving blades 60 attached to the target disk 40 are also removed from the target disk 40 in the same procedure as described above. However, when the other moving blades 60 are continuously removed, it is not necessary to perform the preparation step (S1) again.
- the U direction (second direction) in the removal device 100 after the arrangement step (S2) is an inclined direction Di in which the blade root groove 45 extends.
- the moving blade 60 can be moved by pushing the moving blade 60 in the direction in which the blade root groove 45 extends with the push rod 130.
- the push rod 130 can be moved to the front side Zf by moving the taper surface 154 in a direction in which a virtual plane perpendicular to the Z direction extends.
- the moving blade 60 can be moved without applying an impact load to the moving blade 60. Therefore, in this embodiment, the moving blade 60 can be easily removed from the blade root groove 45 without damaging the moving blade 60.
- the taper forming body 152 is rotated by operating the handle 155.
- the distance from the rotation center axis 151 serving as a fulcrum to the handle 155 serving as a power point is longer than the distance from the rotation center axis 151 serving as a fulcrum to the tapered surface 154 serving as an action point. Therefore, the taper forming body 152 can be rotated with a small force.
- the push rod 130 can be moved to the front side Zf with a small force. For this reason, in this embodiment, the moving blade 60 can be easily removed from the blade root groove 45 also from this viewpoint.
- the taper forming body 152 can be made smaller than the case where the taper surface 154 extends linearly.
- the pressing member 121 of the movement restraining mechanism 120 is moved in the Z direction by the member separation mechanism 127 of the movement restraining mechanism 120, thereby bringing the front surface 123 of the base 101 into contact with the axial end surface of the disk 40.
- the movement of 101 in the Z direction is constrained. Therefore, in this embodiment, the movement of the base 101 in the Z direction with respect to the disk 40 can be easily restrained.
- the bar guide 140 and the push bar 130 can be changed according to the disk 40, so that the versatility of the detaching apparatus 100 can be enhanced.
- the removal device 100 is disposed on the upstream side Dau of the target disk 40.
- the removal device 100 may be disposed on the downstream side Dad of the target disk 40.
- the front surface 123 of the base 101 of the removal apparatus 100 is in contact with the rear end surface 44 of the target disk 40.
- the taper forming body a member having a tapered surface, a tool, a jig, or the like may be temporarily attached to the base 101, and the push rod 130 may be moved by moving these members.
- the tapered surface is not limited to extending in the circumferential direction with respect to the rotation center axis. For example, it may extend linearly in the X direction, the Y direction, the Z direction, or a direction having two or more of these components. In this case, the taper forming body on which the tapered surface is formed is moved in a direction including a direction component in which the tapered surface extends.
- the rod moving mechanism 150 a of this modification has a rod moving bolt 156 and a screw hole 117 formed in the frame 110.
- the rod moving bolt 156 has a male screw portion 156a and a bolt head portion 156b formed at the end of the male screw portion 156a.
- the screw hole 117 extends in the Z direction.
- a female screw 117a to which the male screw portion 156a can be screwed is formed on the inner peripheral surface of the screw hole 117.
- the screw hole 117 is a rear wall plate 115 of the frame 110, and the bolt head 156b is inserted into the rear end face 138a of the push rod 130a in a state where the male screw portion 156a of the rod moving bolt 156 is screwed therein. It is formed at a position where it can come into contact.
- a tool 160 such as a wrench is attached to the bolt head 156b of the rod moving bolt 156, and the rod moving bolt 156 is rotated.
- the rod moving bolt 156 rotates, it moves to the front side Zf in the Z direction.
- the push rod 130a is pushed out to the front side Zf. Since the movement direction of the push rod 130a is regulated by the bar guide 140 in the U direction, the push rod 130a moves to the front side in the U direction.
- the groove insertion portion 132 of the push rod 130a protrudes from the front surface 123 of the base 101, and the pressing surface 135 of the push rod 130a contacts the front end surface 64 of the blade root 62 of the rotor blade 60. In contact therewith, this push rod 130 a pushes the blade root 62 of the rotor blade 60.
- the moving blade 60 can be moved by pushing the moving blade 60 in the direction in which the blade root groove 45 extends with the push rod 130a. Furthermore, in this modification, the push rod 130a can be moved to the front side Zf by rotating the rod moving bolt 156. For this reason, in this modification, the moving blade 60 can be moved without applying an impact load to the moving blade 60. Therefore, also in this modification, the moving blade 60 can be easily removed from the blade root groove 45 without damaging the moving blade 60.
- the end surface of the bolt head 156b that is in contact with the rear end surface 138a of the push rod 130a continues to be kept perpendicular to the Z direction even when the rod moving bolt 156 is rotated.
- the rear end surface 138a of the push rod 130a in this modified example forms a plane perpendicular to the Z direction, unlike the above embodiment.
- the rod moving mechanism 150b of the present modification has a male screw 139 formed on the push rod 130b and a female screw 143 formed on the rod guide 140b.
- the push rod 130b which is a bolt, includes a screw portion 136b in which a male screw 139 forming a part of the rod moving mechanism 150b is formed, a bolt head portion 137b formed in the first end portion of the screw portion 136b, And a tip portion 132b formed at the second end of the portion 136b.
- the tip portion 132b has a hemispherical shape that protrudes on the opposite side of the bolt head portion 137b with respect to the screw portion 136b.
- the surface of the tip end portion 132 b forms a pressing surface 135 b that presses the blade root 62.
- a guide hole 142b penetrating in the U direction is formed in the same manner as the rod guide 140 of the above embodiment.
- a female screw 143 to which the male screw 139 of the push rod 130b can be screwed is formed on the inner peripheral surface of the guide hole 142b of this modification.
- a tool such as a wrench is attached to the bolt head 137b of the push rod 130b, and the push rod 130b is rotated. With this rotation, the push rod 130b moves to the front side in the U direction.
- the pressing surface 135b of the push rod 130b contacts the front end surface 64 of the blade root 62 of the rotor blade 60, and the push rod 130b presses the blade root 62 of the rotor blade 60.
- the moving blade 60 can be moved by pushing the moving blade 60 in the direction in which the blade root groove 45 extends with the push rod 130b. Furthermore, in this modification, this push rod 130b can be moved to the front side Zf by rotating the push rod 130b. For this reason, in this modification, the moving blade 60 can be moved without applying an impact load to the moving blade 60. Therefore, also in this modification, the moving blade 60 can be easily removed from the blade root groove 45 without damaging the moving blade 60.
- the rod moving mechanism 150c of this modification has a hydraulic cylinder 158.
- the hydraulic cylinder 158 has a cylinder casing 158b and a cylinder head 158a that moves relative to the cylinder casing 158b.
- the cylinder casing 158b is attached to the rear wall plate 115 of the frame 110 so that the moving direction of the cylinder head 158a is in the Z direction and the cylinder head 158a can contact the rear end surface 138a of the push rod 130a.
- the hydraulic cylinder 158 is driven.
- the cylinder head 158a moves to the front side Zf in the Z direction.
- the push rod 130a is pushed out to the front side Zf. Since the movement direction of the push rod 130a is regulated by the bar guide 140 in the U direction, the push rod 130a moves to the front side in the U direction.
- the pressing surface 135 of the push rod 130a contacts the front end surface 64 of the blade root 62 of the rotor blade 60, and the push rod 130a presses the blade root 62 of the rotor blade 60.
- the moving blade 60 can be moved by pushing the moving blade 60 in the direction in which the blade root groove 45 extends with the push rod 130a. Further, in this modification, the push rod 130a can be moved to the front side Zf by driving the hydraulic cylinder 158 and moving the cylinder head 158a. For this reason, in this modification, the moving blade 60 can be moved without applying an impact load to the moving blade 60. Therefore, also in this modification, the moving blade 60 can be easily removed from the blade root groove 45 without damaging the moving blade 60.
- the cylinder casing 158b is attached to the frame 110 so that the moving direction of the cylinder head 158a is in the Z direction.
- the cylinder casing 158b may be attached to the frame 110 so that the moving direction of the cylinder head 158a is the U direction.
- a hydraulic cylinder 158 is used as the rod moving mechanism 150c.
- another actuator such as a pneumatic cylinder or an electromagnetic actuator may be used.
- one pressing member 121 is provided for the two separation bolts 128.
- two pressing members may be provided for the two separating bolts 128. In this case, one pressing member is fixed to the tip of one separation bolt 128.
- the main plate 122 of the pressing member 121 in the above embodiment is disposed on the front side Zf of the frame 110.
- the main plate 122 of the pressing member 121 may be disposed on the rear side Zr of the frame 110.
- the front surface 112 of the frame 110 is the front surface of the base 101
- the surface of the pressing member 121 facing the rear side Zr is the rear surface of the base 101.
- the movement restraining mechanism 120 in the embodiment includes a pressing member 121 and a member separation mechanism 127.
- the movement restraining mechanism 120 may be only the pressing member 121.
- the base 101 including the frame 110 and the pressing member 121 may be restrained so as not to move in the Z direction with respect to the disk 40.
- the pressing member 121 is disposed on the front surface 112 of the frame 110, the surface of the pressing member 121 facing the front side Zf becomes the front surface of the base 101.
- the pressing member 121 when the pressing member 121 is disposed on the rear side Zr of the frame 110, the front surface 112 of the frame 110 becomes the front surface of the base 101.
- the pressing member 121 may be integrally formed with the frame 110.
- the pressing member 121 in the said embodiment is a plate-shaped member.
- the pressing member may be, for example, a bolt in which a male screw is formed on the shaft portion.
- a screw hole extending in the direction including the Z direction component is formed in the frame 110.
- a female screw that can be screwed with a male screw such as a bolt is formed in the screw hole.
- the base including the frame 110 and the bolts is restrained so as not to move in the Z direction with respect to the disk 40 by changing the screwing amount of the bolts and the like with respect to the frame 110.
- the pressing member may have any mode as long as it has a function of restraining the base so as not to move with respect to the disk 40.
- the base 101 in the above embodiment has a movement restraining mechanism 120.
- this movement restraining mechanism 120 may be omitted.
- the width dimension in the Z direction of the frame 110 needs to match the mutual spacing dimension of the adjacent disks 40 in the axial direction Da. Therefore, the use of the removal device without the movement restraining mechanism 120 is limited to the removal of the moving blade 60 attached to the specific disk 40.
- the moving blade can be easily removed from the blade root groove without damaging the moving blade.
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Abstract
Description
本願は、2016年1月8日に、日本国に出願された特願2016-002699号に基づき優先権を主張し、この内容をここに援用する。
第一方向へ移動不能に拘束されるベースと、前記第一方向の一方側である前側を向く前記ベースの前面から前記前側に突出可能な押し棒と、前記ベースに設けられ、前記押し棒を前記前側に移動させる棒移動機構と、前記ベースに取り付けられ、前記棒移動機構による前記押し棒の移動を、前記第一方向に対して鋭角を成す第二方向にガイドする棒ガイドと、を備える。
以上のいずれかの前記翼の取外装置と、ロータ軸と、前記ロータ軸の外周側に取り付けられる複数の動翼と、を備え、前記動翼は、前記ロータ軸に対する径方向に延びて翼形を成す翼体と、前記翼体の径方向内側に設けられている翼根と、を有し、前記ロータ軸には、径方向外側から径方向内側に向かって凹み、前記ロータ軸が延びる軸方向に対して鋭角を成す傾斜方向に延びて、前記翼根が挿入される翼根溝が形成され、前記第一方向に対する前記第二方向がなす角度は、前記軸方向に対する前記傾斜方向が成す角度に一致する。
前記棒ガイドが前記ガイド孔を有する前記動翼の取外装置と、ロータ軸と、前記ロータ軸の外周側に取り付けられる複数の動翼と、を備え、前記動翼は、前記ロータ軸に対する径方向に延びて翼形を成す翼体と、前記翼体の径方向内側に設けられている翼根と、を有し、前記ロータ軸には、径方向外側から径方向内側に向かって凹み、前記ロータ軸が延びる軸方向に対して鋭角を成す傾斜方向に延びて、前記翼根が挿入される翼根溝が形成され、前記第一方向に対する前記第二方向がなす角度は、前記軸方向に対する前記傾斜方向が成す角度に一致し、前記取外装置は、前記棒ガイドである第一棒ガイドの他に、第二棒ガイドを有し、前記第二棒ガイドは、前記第一棒ガイドの前記ガイド孔の形状とは異なる形状の第二ガイド孔を有する。なお、ガイド孔の形状が異なるとは、ガイド孔の貫通方向に対して垂直な断面形状が異なること、第一方向に対してガイド孔の貫通方向である第二方向が異なることの両方を含む。
ロータ軸の外周側に取り付けられている動翼の取外方法において、前記動翼は、前記ロータ軸に対する径方向に延びて翼形を成す翼体と、前記翼体の径方向内側に設けられている翼根と、を有し、前記ロータ軸には、径方向外側から径方向内側に向かって凹み、前記ロータ軸が延びる軸方向に対して鋭角を成す傾斜方向に延びて、前記翼根が挿入される翼根溝が形成され、第一方向へ移動不能に拘束されるベースと、前記第一方向の一方側である前側を向く前記ベースの前面から前記前側に突出可能な押し棒と、前記ベースに設けられ、前記押し棒を前記前側に移動させる棒移動機構と、前記ベースに取り付けられ、前記棒移動機構による前記押し棒の移動を、前記第一方向に対して鋭角を成す第二方向にガイドする棒ガイドと、を備える取外装置を準備する準備工程と、前記ロータ軸で前記軸方向を向く軸方向端面に前記ベースの前記前面を接触させると共に、前記押し棒の前記前側の端面と前記翼根とを対向させ、前記軸方向に前記第一方向が一致し且つ前記傾斜方向に前記第二方向が一致するよう、前記取外装置の前記ベースを配置する配置工程と、前記棒移動機構により前記押し棒を前記前側に移動させる棒移動工程と、を実行する。
回転機械の実施形態について、図1~図4を参照して説明する。
取外装置の実施形態について、図5~図12を参照して説明する。
図13及び図14を参照して、上記実施形態における棒移動機構150の第一変形例について説明する。
図15を参照して、上記実施形態における棒移動機構150の第二変形例について説明する。
図16を参照して、上記実施形態における棒移動機構150の第三変形例について説明する。
また、フレーム110の後側Zrに押付部材121を配置した場合には、フレーム110の前面112がベース101の前面になる。さらに、押付部材121は、フレーム110と一体形成されてもよい。また、上記実施形態における押付部材121は、板状の部材である。しかしながら、押付部材は、例えば、雄ネジが軸部に形成されているボルト等でもよい。フレーム110には、Z方向成分を含む方向に延びるネジ穴を形成する。このネジ穴には、ボルト等の雄ネジが螺合可能な雌ネジが形成されている。この場合、フレーム110に対するボルト等の捩じ込み量を変えることで、フレーム110及びボルト等を含むベースをディスク40に対してZ方向に移動不能に拘束する。このように、押付部材は、ベースをディスク40に対して移動不能に拘束する機能を有していれば、如何なる態様でもよい。
2:ガスタービンロータ
5:ガスタービン車室
10:タービン
11:タービンロータ
12,32:ロータ軸
13,33:動翼列
15:タービン車室
17,37:静翼列
20:燃焼器
30:圧縮機
31:圧縮機ロータ
35:圧縮機車室
39:空気圧縮流路
40:ディスク
41:動翼取付部
42:ガスパス面
43:前端面
44:後端面
45:翼根溝
48:溝底面
49:ピン穴
58:ピン
59:バネ
60:動翼
61:翼体
62:翼根
63:ガスパス面
64:前端面
65:後端面
69:ピン穴
100:取外装置
101:ベース
110:フレーム
111:前壁板
112:前面
113:ネジ孔
114:ガイド装着孔
115:後壁板
116:後面
117:ネジ穴
117a:雌ネジ
119:連結部
119a:円弧面
120:移動拘束機構
121:押付部材
122:主板
123:(ベースの)前面
124:側板
125:外れ防止板
127:部材離間機構
128:離間用ボルト
129:操作棒
130,130a,130b:押し棒
132:溝挿入部
132b:先端部
135,135b:押圧面
136:胴部
136b:ネジ部
137:尾部
137b:ボルト頭部
138,138a:後端面
139:雄ネジ
140,140b:棒ガイド
141:本体部
142,142b:ガイド孔
143:雌ネジ
145:フランジ部
146:ネジ(固定具)
150,150a,150b,150c:棒移動機構
151:回転中心軸
152:テーパ形成体
153:回転板
154:テーパ面
155:ハンドル
156:棒移動用ボルト
156a:雄ネジ部
158:油圧シリンダ(アクチュエータ)
Da:軸方向
Dau:上流側
Dad:下流側
Dc:周方向
Dr:径方向
Dri:径方向内側
Dro:径方向外側
Di:傾斜方向
Z:Z方向(第一方向)
Zf:前側
Zr:後側
U:U方向(第二方向)
Claims (19)
- 第一方向へ移動不能に拘束されるベースと、
前記第一方向の一方側である前側を向く前記ベースの前面から前記前側に突出可能な押し棒と、
前記ベースに設けられ、前記押し棒を前記前側に移動させる棒移動機構と、
前記ベースに取り付けられ、前記棒移動機構による前記押し棒の移動を、前記第一方向に対して鋭角を成す第二方向にガイドする棒ガイドと、
を備える動翼の取外装置。 - 請求項1に記載の動翼の取外装置において、
前記ベースは、前記棒移動機構が設けられると共に、前記棒ガイドが取り付けられるフレームと、前記フレームの前記第一方向への移動を拘束する移動拘束機構と、
を有する、
動翼の取外装置。 - 請求項2に記載の動翼の取外装置において、
前記移動拘束機構は、前記フレームよりも前記前側又は前記前側とは反対の後側に少なくとも一部が配置される押付部材を有する、
動翼の取外装置。 - 請求項2又は3に記載の動翼の取外装置において、
前記ベースは、前記移動拘束機構である第一移動拘束機構の他に、前記第一方向及び前記第二方向に垂直な第三方向への前記フレームの移動を拘束する第二移動拘束機構を有し、
前記第二移動拘束機構は、前記第三方向の一方側を向く面であって、前記ベースよりも前記第三方向の前記一方側に位置して前記第一方向に延びる仮想軸を中心として、円弧状を成す円弧面を有する、
動翼の取外装置。 - 請求項1から4のいずれか一項に記載の動翼の取外装置において、
前記棒ガイドは、前記第二方向に貫通し、前記押し棒が摺接可能なガイド孔を有し、
前記棒ガイドは、前記ベースに対して着脱可能である、
動翼の取外装置。 - 請求項1から5のいずれか一項に記載の動翼の取外装置において、
前記棒移動機構は、前記前側を向くテーパ面が形成されているテーパ形成体を有し、
前記テーパ形成体の前記テーパ面が前記押し棒における前記前側とは反対の後側の端面に接触しつつ移動することで、前記押し棒を前記前側に移動させる、
動翼の取外装置。 - 請求項1から5のいずれか一項に記載の動翼の取外装置において、
前記棒移動機構は、前記第一方向に垂直な仮想面に対して傾斜し且つ前記前側を向くテーパ面が形成されているテーパ形成体を有し、前記テーパ形成体は、前記テーパ面が前記押し棒における前記前側とは反対の後側の端面に接触しつつ前記後側の端面に対して、前記仮想面が広がっている方向に相対移動可能に、前記ベースに設けられている、
動翼の取外装置。 - 請求項6又は7に記載の動翼の取外装置において、
前記棒移動機構は、回転中心軸を有し、
前記テーパ形成体は、前記回転中心軸を中心として回転可能に前記回転中心軸に取り付けられ、
前記テーパ面は、前記回転中心軸に対する周方向に延びている、
動翼の取外装置。 - 請求項8に記載の動翼の取外装置において、
前記テーパ形成体は、前記回転中心軸を中心として回転する回転板と、前記回転板の外周から前記回転中心軸に対する放射方向に延びているハンドルと、を有し、
前記テーパ面は、前記回転板に形成されている、
動翼の取外装置。 - 請求項1から5のいずれか一項に記載の動翼の取外装置において、
前記棒移動機構は、前記押し棒における前記前側とは反対側の後側の端面に接触する雄ネジと、前記ベースに設けられ、前記雄ネジが螺合可能な雌ネジが形成され且つ前記第一方向に延びるネジ穴と、を有する、
動翼の取外装置。 - 請求項1から5のいずれか一項に記載の動翼の取外装置において、
前記棒移動機構は、前記押し棒を前記前側に移動させる力を発するアクチュエータを有する、
動翼の取外装置。 - 請求項1から11のいずれか一項に記載の動翼の取外装置と、
ロータ軸と、
前記ロータ軸の外周側に取り付けられる複数の動翼と、
を備え、
前記動翼は、前記ロータ軸に対する径方向に延びて翼形を成す翼体と、前記翼体の径方向内側に設けられている翼根と、を有し、
前記ロータ軸には、径方向外側から径方向内側に向かって凹み、前記ロータ軸が延びる軸方向に対して鋭角を成す傾斜方向に延びて、前記翼根が挿入される翼根溝が形成され、
前記第一方向に対する前記第二方向がなす角度は、前記軸方向に対する前記傾斜方向が成す角度に一致する、
ロータセット。 - 請求項5に記載の動翼の取外装置と、
ロータ軸と、
前記ロータ軸の外周側に取り付けられる複数の動翼と、
を備え、
前記動翼は、前記ロータ軸に対する径方向に延びて翼形を成す翼体と、前記翼体の径方向内側に設けられている翼根と、を有し、
前記ロータ軸には、径方向外側から径方向内側に向かって凹み、前記ロータ軸が延びる軸方向に対して鋭角を成す傾斜方向に延びて、前記翼根が挿入される翼根溝が形成され、
前記第一方向に対する前記第二方向がなす角度は、前記軸方向に対する前記傾斜方向が成す角度に一致し、
前記取外装置は、前記棒ガイドである第一棒ガイドの他に、第二棒ガイドを有し、
前記第二棒ガイドは、前記第一棒ガイドの前記ガイド孔の形状とは異なる形状の第二ガイド孔を有する、
ロータセット。 - ロータ軸の外周側に取り付けられている動翼の取外方法において、
前記動翼は、前記ロータ軸に対する径方向に延びて翼形を成す翼体と、前記翼体の径方向内側に設けられている翼根と、を有し、
前記ロータ軸には、径方向外側から径方向内側に向かって凹み、前記ロータ軸が延びる軸方向に対して鋭角を成す傾斜方向に延びて、前記翼根が挿入される翼根溝が形成され、
第一方向へ移動不能に拘束されるベースと、前記第一方向の一方側である前側を向く前記ベースの前面から前記前側に突出可能な押し棒と、前記ベースに設けられ、前記押し棒を前記前側に移動させる棒移動機構と、前記ベースに取り付けられ、前記棒移動機構による前記押し棒の移動を、前記第一方向に対して鋭角を成す第二方向にガイドする棒ガイドと、を備える取外装置を準備する準備工程と、
前記ロータ軸で前記軸方向を向く軸方向端面に前記ベースの前記前面を接触させると共に、前記押し棒の前記前側の端面と前記翼根とを対向させ、前記軸方向に前記第一方向が一致し且つ前記傾斜方向に前記第二方向が一致するよう、前記取外装置の前記ベースを配置する配置工程と、
前記棒移動機構により前記押し棒を前記前側に移動させる棒移動工程と、
を実行する、
動翼の取外方法。 - 請求項14に記載の動翼の取外方法において、
前記準備工程は、
前記第二方向に貫通し、互いに異なる形状のガイド孔を有する複数の棒ガイド、及び複数の前記棒ガイドに対応した押し棒を準備する棒ガイド準備工程と、
複数の前記棒ガイドのうちから、前記翼根の形状に対応したガイド孔を有する棒ガイドを選択すると共に、選択した前記棒ガイドに対応する押し棒を選択する選択工程と、
前記選択工程で選択した前記棒ガイドを前記ベースに取り付けると共に、前記選択工程で選択した前記押し棒を前記棒ガイドに沿わせる棒ガイド取付工程と、を含む、
動翼の取外方法。 - 請求項14又は15に記載の動翼の取外方法において、
前記準備工程で準備する前記取外装置における前記ベースは、前記棒移動機構が設けられると共に、前記棒ガイドが取り付けられるフレームと、前記フレームよりも前記前側又は前記前側とは反対の後側に少なくとも一部が配置される押付部材と、を有し、
前記配置工程では、前記押付部材を前記フレームの前側又は後側に配置し、前記ロータ軸で前記軸方向を向く軸方向端面に前記押付部材を接触させる、
動翼の取外方法。 - 請求項14から16のいずれか一項に記載の動翼の取外方法において、
前記準備工程で準備する前記取外装置における前記棒移動機構は、前記前側を向くテーパ面が形成されているテーパ形成体を有し、
前記棒移動工程では、前記テーパ形成体の前記テーパ面を前記押し棒における前記前側とは反対の後側の端面に接触させつつ移動させることで、前記押し棒を前記前側に移動させる、
動翼の取外方法。 - 請求項17に記載の動翼の取外方法において、
前記準備工程で準備する前記取外装置における前記棒移動機構は、回転中心軸を有し、
前記テーパ形成体は、前記回転中心軸を中心として回転可能に前記回転中心軸に取り付けられ、前記テーパ面は、前記回転中心軸に対する周方向に延びており、
前記棒移動工程では、前記テーパ形成体を前記回転中心軸を中心として回転させる、
動翼の取外方法。 - 請求項14から16のいずれか一項に記載の動翼の取外方法において、
前記準備工程で準備する前記取外装置における前記棒移動機構は、前記ベースに設けられ、雌ネジが形成されているネジ穴と、前記ネジ穴の前記雌ネジに螺合可能な雄ネジと、を有し、
前記棒移動工程では、前記雄ネジを回転させて、前記押し棒を前記前側に移動させる、
動翼の取外方法。
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