JP2011043124A - Correction method for deformation in combustor liner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a correction method for deformation in a combustor liner that corrects the deformation only in the part of combustor liner including the deformation part in a gas turbine and improves the deformation correction quality of the combustor liner. <P>SOLUTION: The correction method for the deformation in the combustor liner includes: a step of heating at least a part of the combustor liner including the deformation part; a step of contacting a deformation modifying member, which has a balancing plane corresponding to a shape before the deformation of the deformation part, with a projecting side more than the shape before the deformation of the deformation part of the combustor liner; and a step of making the pressure to abut the deformation part of the combustor liner closely to the deformation modifying member act to correct the deformation part. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a combustor liner deformation correction method for correcting the deformation of components of a gas turbine that are exposed to high temperature combustion gases, such as a combustor liner.

  In a gas turbine power plant, air is sucked and compressed from the outside by a compressor provided coaxially with the gas turbine, and the compressed air is guided to a combustor. Then, oil as fuel is injected into the compressed air introduced into the compressor and heated to generate high-temperature and high-pressure combustion gas. The high temperature and high pressure combustion gas is guided to the moving blade through the combustor liner, the transition piece and the stationary blade, and then the moving blade is driven to rotate. In this way, the thermal energy generated by the generation of combustion gas is converted into mechanical energy for rotating the rotor blades, and power is generated by a generator provided coaxially.

  In this gas turbine, the higher the gas temperature at the combustor output, the higher the power generation efficiency. Therefore, the gas turbine inlet temperature has been increased, but it is extremely severe for the combustor liner exposed to the high temperature. It is an environment. In this gas turbine, various damages occur in the components of the gas turbine as it is operated. In particular, in the combustor liner, deformation of components due to combustion vibration during operation has been a problem.

  Therefore, a method has been proposed in which a deformation correction jig having a large thermal expansion coefficient is inserted inside the combustor liner to increase the temperature, and the shape is corrected by the difference in thermal expansion (for example, Patent Document 1).

JP 2008-297931 A

  However, in Patent Document 1 described above, in order to obtain a sufficient amount of deformation correction, it is necessary to put the entire part in an electric furnace or the like and heat it to a temperature equal to or higher than a predetermined deformation temperature. There is a problem that the applied brazing material melts. In order to prevent melting of the brazing material, it may be necessary to re-join and recoat after mechanically cutting only the material deterioration portion in advance and performing deformation correction processing. In this case, the cost required for regeneration becomes excessive.

  The present invention has been made to solve such a problem, and only a part of a combustor liner including a deformed portion in a gas turbine is deformed and corrected, and the combustor liner can be improved in deformation correction quality. It is an object of the present invention to provide a liner deformation correction method.

  In order to solve the above problems, a combustor liner deformation correcting method according to the present invention includes a step of heating at least a part including a deformed portion of the combustor liner and a shape before the deformed portion of the combustor liner is deformed. A step of abutting a deformation correction member having a correction surface corresponding to a shape before deformation of the deformation portion on the side, and a pressing force for bringing the deformation portion and the deformation correction member of the combustor liner into close contact with each other. Modifying the unit.

  ADVANTAGE OF THE INVENTION According to this invention, only a part of combustor liner including a deformation | transformation part in a gas turbine can be deformed and corrected, and the deformation correction quality of a combustor liner can be improved.

It is a figure which shows the apparatus for implementing the combustor liner deformation correction method which concerns on Embodiment 1 of this invention, (a) is a perspective view which shows a combustor liner, (b) is a schematic sectional drawing of a deformation correction apparatus. . It is a flowchart for demonstrating the deformation | transformation operation | movement of a deformation | transformation part by a deformation | transformation correction apparatus. It is a figure which shows the tensile characteristic of the nickel base superalloy used for a combustor liner, (a) is a figure which shows the relationship between tensile strength and temperature, (b) is a figure which shows the relationship between tensile breaking elongation and temperature. It is sectional drawing which shows schematic structure of the deformation correction apparatus which concerns on the modification of Embodiment 1 of this invention. It is a figure which shows the apparatus for implementing the combustor liner deformation correction method which concerns on Embodiment 2 of this invention, (a) is a schematic sectional drawing of a deformation correction apparatus, (b) was arrange | positioned by the deformation correction jig | tool. The perspective view which shows a coil, (c) is AA sectional drawing of (b). It is a schematic sectional drawing of the deformation correction apparatus for enforcing the combustor liner deformation correction method which concerns on Embodiment 3 of this invention. It is a figure which shows the apparatus for implementing the combustor liner deformation correction method which concerns on Embodiment 4 of this invention, (a) is a schematic sectional drawing of a deformation correction apparatus, (b) is the coil arrange | positioned at the combustor liner The perspective view which shows this, (c) is BB sectional drawing of (b). It is sectional drawing which shows schematic structure of the deformation correction apparatus which concerns on the modification 1 of Embodiment 4 of this invention. It is sectional drawing which shows schematic structure of the deformation correction apparatus which concerns on the modification 2 of Embodiment 4 of this invention. It is a figure which shows the apparatus for implementing the combustor liner deformation correction method which concerns on Embodiment 5 of this invention, (a) is a schematic sectional drawing of a deformation correction apparatus, (b) is an expanded sectional view of a deformation correction jig. is there. It is sectional drawing which shows schematic structure of the deformation correction apparatus which concerns on the modification of Embodiment 5 of this invention. It is sectional drawing which shows schematic structure of the deformation correction apparatus which concerns on Embodiment 6 of this invention. It is sectional drawing which shows schematic structure of the deformation correction apparatus which concerns on the modification of Embodiment 6 of this invention.

(Embodiment 1)
Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1A and 1B are diagrams showing an apparatus for carrying out a combustor liner deformation correcting method according to Embodiment 1 of the present invention, wherein FIG. 1A is a perspective view showing a combustor liner, and FIG. 1B is an outline of the deformation correcting apparatus. It is sectional drawing.

As shown in FIG. 1, the combustor liner 10 includes a large-diameter large cylindrical portion 10a serving as a combustion gas inlet portion, a small-diameter small cylindrical portion 10b serving as a combustion gas outlet portion, and the large cylindrical portions 10a. And a tapered portion 11 for connecting the small cylindrical portion 10b.
The combustor liner 10 is formed of, for example, a nickel-base superalloy or a cobalt-base superalloy having a thickness of several [mm]. The cross-sectional shape of the tapered portion 11 is originally a perfect circle, but gradually changes when used for a long time in a gas turbine power plant. In the present embodiment, the case where the tapered portion 11 of the combustor liner 10 is deformed mainly toward the inside of the cylindrical shape will be described.

  The deformation correction apparatus according to this embodiment includes a rotation drive unit 12, a pedestal 13, a position detection unit 14, a coil 15, shielding plates 16a and 16b, a high-frequency circuit 17, a deformation correction jig 18, and a control unit 19. In this deformation correction device, a pedestal 13 is disposed on the rotation drive unit 12, and the combustor liner 10 and the position detection unit 14 are disposed on the pedestal 13. The combustor liner 10 is disposed on the pedestal 13 in an upside down direction with respect to FIG. The position detector 14 is provided on the pedestal 13 and inside the combustor liner 10. Further, a high frequency induction heating coil 15 is disposed on the outer peripheral surface of the tapered portion 11 of the combustor liner 10, and shielding plates 16 a and 16 b are provided outside the tapered portion 11 adjacent to the outer peripheral surface. . In addition, a deformation correction jig 18 is disposed inside the tapered portion 11 so as to contact the inner peripheral surface.

  The rotation drive unit 12 includes a rotation motor that rotates the pedestal 13. The combustor liner 10 is placed on the pedestal 13 in a state opposite to the state shown in FIG. 1A (see FIG. 1B). The combustor liner 10 rotates about the central axis C in the longitudinal direction as the pedestal 13 rotates. In the high-frequency induction heating described later, the temperature distribution tends to be wide. Therefore, by providing the rotation drive unit 12 that rotates the pedestal 13, the combustor liner 10 is rotated to make the temperature of the tapered portion 11 uniform. Instead of rotating the combustor liner 10, the coil 15 can be rotated.

  The pedestal 13 is provided with the combustor liner 10, the position detection unit 14, and the like. This pedestal 13 has a flat surface and sufficient strength against the weight of the load. The material of the pedestal 13 may be any material as long as the flatness and strength conditions are satisfied, and examples thereof include concrete and carbon steel. The pedestal 13 may have a rotation mechanism such as a potter's wheel.

  The position detection unit 14 is disposed on the pedestal 13 and detects the position of the deformation correction jig 18. The position detection unit 14 electrically detects contact with the deformation correction jig 18. In the present embodiment, since the deformation correction jig 18 may tilt and descend, the position detectors 14 are arranged at a plurality of locations. Further, the position detection unit 14 has a structure having sufficient strength to support the weight of the deformation correction jig 18. Further, if the upper surface position of the deformation correction jig 18 is made to coincide with the ideal final arrival position of the lower surface of the deformation correction jig 18, the posture of the deformation correction jig 18 that has been tilted and lowered is in an ideal state. It is also possible to prevent the deformation correcting jig 18 from descending past the final position.

  The coil 15 is disposed on the outer peripheral surface of the tapered portion 11 including the deformable portion 1. This coil 15 is a general high frequency induction heating coil for induction heating of metal, and has a copper tube through which cooling water flows. The coil 15 is configured in a spring-shaped pattern wound, for example, concentrically along the outer peripheral surface of the tapered portion 11, and an alternating current is applied from the high-frequency circuit 17. Due to the applied alternating current, a magnetic flux of a high-frequency electromagnetic field is generated around the coil 15. When the combustor liner 10 base material is placed in the space having the magnetic flux, an eddy current is induced in the combustor liner 10 base material, so that the taper portion 11 is induction-heated, and the high-frequency heating region is changed. Form.

The shielding plates 16 a and 16 b are disposed on the outer peripheral surface of the combustor liner 10 in the vicinity of the high-frequency heating region, and shield the leakage magnetic flux from the coil 15. As a result, it is possible to prevent inductive heating of the combustor liner portion other than the high-frequency heating region that does not require deformation correction due to the leakage magnetic flux from the coil 15. The material of the shielding plates 16a and 16b is preferably a metal, and an inexpensive material such as carbon steel can be used.
The high-frequency circuit 17 is a high-frequency power source that generates an alternating current.

  The deformation correction jig 18 is made of a material having a strength sufficient to withstand the heating temperature during the deformation correction work, and is configured in a tapered shape that matches the inner peripheral surface shape of the tapered portion 11 before the deformation. The deformation correcting jig 18 has a tapered portion 20 that contacts the tapered portion 11 of the combustor liner 10. Since the base material of the combustor liner 10 is thin, if the deformation correction jig 18 has a sufficient thickness, the material of the deformation correction jig 18 is not necessarily the same as that of the combustor liner 10 base material. Need not be strong. The material of the combustor liner 10 may be an inexpensive material such as carbon steel, and may be stainless steel, nickel-base alloy, cobalt-base alloy, or non-conductive ceramic such as zirconia or silicon carbide as required. Good.

  The deformation correcting jig 18 has a sufficient weight, and is heated before the deformation of the tapered portion 11 of the combustor liner 10 which has been reduced in yield stress (the limit value of the stress that returns to the original shape without any deformation remaining). Plastic deformation to the shape of In addition, when the pressure application to the deformation | transformation part 1 is inadequate with the dead weight of the deformation correction jig | tool 18, a weight is further put on the deformation correction jig | tool 18, and a deformation | transformation part is carried out with the weight of the deformation correction jig 18 and the weight. A pressure may be applied to 1. Further, in order to pull out the deformation correction jig 18 from the inside of the combustor liner 10, the deformation correction jig 18 may be connected by a crane or the like (not shown) and lifted from the inside of the combustor liner 10.

  The control unit 19 controls the rotation driving unit 12, the position detection unit 14, the high frequency circuit 17, and the like. The control unit 19 drives and controls the motor of the rotation driving unit 12. In addition, when the detection signal is input from the control unit 19, the control unit 19 has a function of notifying the arrival of the deformation correction jig 18 at a predetermined position by a buzzer (not shown) and a function of controlling on / off of the high-frequency circuit 17. . Furthermore, the control unit 19 may have a function of outputting a winding instruction to a crane that hangs the deformation correction jig 18 after the deformation correction jig 18 reaches a predetermined position. For example, when a winding detection sensor that detects the wire position (winding amount) of the crane that suspends the deformation correction jig 18 is provided, the control unit 19 may have a function of controlling the winding amount. It is. In this case, as a means for correcting the posture of the tilted deformation correcting jig 18, the position detection unit 14 can be configured by a plurality of columns having columnar shapes having the same height.

(Deformation correction operation)
Next, the deformation correction operation of the deformation unit 1 will be described based on the flowchart of FIG.
FIG. 2 is a flowchart for explaining the deformation correcting motion of the deforming unit 1 by the deformation correcting device.

  FIG. 3 is a diagram showing the tensile characteristics of the nickel-base superalloy used in the combustor liner 10, (a) is a diagram showing the relationship between tensile strength and temperature, and (b) is a graph showing tensile elongation at break and temperature. It is a figure which shows a relationship.

  When the base material of the combustor liner 10 is a nickel-base superalloy, the heating temperature of the combustor liner 10 is about 600 [° C.] to 1200 [° C.]. Preferably, about 700 [° C.] to 900 [° C.] is appropriate. That is, when the heating temperature is 600 [° C.] or higher, plastic deformation can be performed with a smaller stress, sufficient ductility can be obtained (see FIG. 3A), and crack formation is also suppressed. When the heating temperature is 1200 [° C.] or more, oxidation of the combustor liner 10 base material becomes a problem.

  This heating temperature may be measured by a thermocouple attached to the combustor liner 10 main body, or by a non-contact temperature measuring means such as a radiation thermometer. Even when the base material of the combustor liner 10 is made of another material such as a cobalt-based alloy, the tendency of qualitative tensile characteristics is almost the same as that shown in FIG. Thus, an appropriate temperature region may be selected by grasping the temperature dependence of the tensile strength and tensile elongation at break.

The moving speed of the deformation correcting jig 18 (the deformation speed of the deforming portion 1) is preferably high for quick deformation correction, but if it is too fast, there is a possibility that a crack will occur in the base material of the combustor liner 10. Becomes higher.
Therefore, for each material of the combustor liner 10 base material, the relationship between strain rate and crack generation may be grasped in advance, and this moving speed may be selected from a range in which no crack is generated. After such a selection is made, the deformation correction of the deformation portion 1 in the above-described combustor liner is performed.

  In FIG. 2, first, the coil 15 and the shielding plates 16a and 16b are disposed at a predetermined outer peripheral position of the combustor liner 10 placed on the pedestal 13 (step S101). Next, an alternating current is applied to the coil 15 to induce induction heating of the tapered portion 11 (step S102). Since the leakage current from the coil 15 is shielded by the disposed shielding plates 16a and 16b, only the tapered portion 11 including the deformed portion 1 is induction-heated.

  Next, the deformation correcting jig 18 is disposed in the combustor liner 10, pressure is applied to the deforming portion 1 (step S 103), and the combustor liner 10 is rotated by the rotation driving unit 12 (step S 10 4). By the rotation of the combustor liner 10, the temperature distribution of the tapered portion 11 becomes constant, and the temperature of the tapered portion 11 becomes uniform. When the taper portion 11 is induction-heated, the yield stress of the base material of the taper portion 11 is reduced, and the taper portion 11 including the deformation portion 1 is plastically deformed by the weight of the deformation correcting jig 18 that comes into contact.

  Next, the final arrival position of the deformation correction jig 18 necessary for making the tapered portion 11 the final target shape before deformation is determined in advance, and the fact that the deformation correction jig 18 has reached this final arrival position. Completion of deformation correction is determined by detection by the position detector 14 (step S105). After this detection, the deformation correction jig 18 is pulled up above the combustor liner 10, the high frequency induction heating is stopped, and the deformation correction ends.

  The final position of the deformation correction jig 18 necessary for making the tapered portion 11 into the final target shape before deformation is determined by removing the deformation correction jig 18 from the combustor liner 10. By taking into account the elastic deformation of the tapered portion 11 and the return of the shape due to thermal expansion when cooling the plate to room temperature, it is possible to correct the shape with higher accuracy by determining from calculations and experiments.

  As described above, in this embodiment, a part of the combustor liner including the deforming portion is induction-heated, and a deformation correction jig having a shape that matches the shape of a part of the combustor liner is provided to the induction-heated combustor liner. A pressure is applied in contact with a part. As a result, the yield stress of the base material of a portion of the combustor liner including the deformed portion in the gas turbine is reduced, and the weight of the deformation correcting jig having sufficient weight to come in contact with the tapered portion of the combustor liner is lowered. Thus, only a part of the combustor liner can be deformed and corrected, and the deformation correction quality of the combustor liner can be improved.

  In the present embodiment, the shielding plate prevents heating of the combustor liner other than the high-frequency heating region due to the leakage magnetic flux from the high-frequency induction heating coil. However, the present invention is not limited to this, for example, other than this high-frequency heating region. Cooling the combustor liner can also prevent the combustor liner other than the high-frequency heating region from being heated.

(Modification)
FIG. 4 is a cross-sectional view showing a schematic configuration of a deformation correction device according to a modification of Embodiment 1 of the present invention. As this cooling method, for example, the outer periphery of the combustor liner 10 other than the taper portion 11 (high-frequency heating region). A cold water pipe 40 is disposed on the surface, and cold water is circulated through the cold water pipe 40 by a pump (not shown). The cold water pipe 40 is configured in a spring-shaped pattern wound concentrically along the outer peripheral surface of the combustor liner 10.
In this modification, the combustor liner 10 other than the taper portion 11 is cooled by the circulation of the cold water, and heating can be prevented.

  As another cooling method, for example, a plurality of air nozzles are provided in the vicinity of the outer peripheral surface of the combustor liner other than the taper portion, and the cooling air supplied from the air compressor is supplied from the air nozzle to the outer periphery of the combustor liner. It is also possible to cool it by spraying it onto the surface, and to prevent heating of the combustor liner other than the tapered portion.

  In addition, either one of the shielding plate and the cooling method may be used, or both may be used simultaneously to prevent the combustion liner other than the high-frequency heating region from being heated. When both the shielding plate and the cooling method are used at the same time, the shielding plate not only shields leakage magnetic flux, but also exhibits an effect of preventing the tapered portion to be heated from being cooled by this cooling method.

(Embodiment 2)
5A and 5B are views showing an apparatus for carrying out the combustor liner deformation correcting method according to the second embodiment of the present invention. FIG. 5A is a schematic sectional view of the deformation correcting apparatus, and FIG. 5B is a deformation correcting jig 18. The perspective view which shows the coil arrange | positioned at (c) is AA sectional drawing of (b).

In the present embodiment, the coil 15 is disposed on the inner peripheral surface of the deformation correction jig 18, and the tapered portion 11 is induction-heated through the deformation correction jig 18.
The coil 15 is configured in a spring-shaped pattern similar to that of the first embodiment and is concentrically wound along the inner peripheral surface of the deformation correction jig 18, and an alternating current is applied from a high-frequency circuit (not shown). In this coil, as shown in FIGS. 5B and 5C, the 360 ° inner peripheral surface of the deformation correcting jig 18 is divided by 180 °, and two coils are provided on the divided inner peripheral surface. The coils 15a and 15b are provided, respectively, and the entire tapered portion 11 can be induction-heated from the inner peripheral surface side. The coils 15a and 15b are each configured in a spiral pattern, and an alternating current is applied from a high-frequency circuit (not shown).

  In this embodiment, two spiral coils are arranged on the inner peripheral surface of the deformation correction jig 18 divided by 180 degrees, but for example, three coils are arranged on the inner peripheral surface of the deformation correction jig 18 divided by 120 degrees. It is also possible to arrange one or more than one. Further, it is possible to arrange one coil on the inner peripheral surface of the 360 ° deformation correction jig 18 without dividing.

  In this configuration, in order to effectively perform induction heating of the combustor liner 10 with a coil, the deformation correction jig 18 is preferably made of a ceramic of a nonmetallic material, for example, silicon carbide, zirconia, alumina or the like is used. be able to.

  In this embodiment, when the deformation | transformation part is deform | transforming toward the inner side of a taper part, the distance of this deformation | transformation part and a coil becomes short, and a deformation | transformation part is induction-heated preferentially. As a result, the yield stress of the deformed portion is preferentially lowered, and the deformed portion can be preferentially deformed and corrected by the own weight of the deformation correcting jig contacting the deformed portion, thereby further improving the deformation correction of the combustor liner. can do.

In the present embodiment, when a plurality of coils are respectively disposed on the inner peripheral surface of the plurality of deformation correction jigs, only the coil corresponding to the formation position of the deformation portion is driven, and the taper portion Can be partially induction heated. As a result, the deformation portion can be selectively changed and corrected, and the deformation correction of the combustor liner can be further improved.
Needless to say, also in this embodiment, the rotary motor, the shielding plate, and the cooling method shown in the first embodiment can be implemented.

(Embodiment 3)
In the first embodiment, a high-frequency induction heating coil is used for the heating unit. Instead, for example, a heater that generates heat by general energization is disposed on the outer peripheral surface of the tapered portion, and infrared rays generated from the generated heater are generated. Thus, it is possible to heat the tapered portion including the deformable portion 1.

As the material of the heater, for example, a material such as iron chrome, nichrome, cantal, silicon carbide, cantal super (molybdenum disilicide) or the like can be used.
Thereby, in this embodiment, since a general heater can be used for a heating part, a deformation correction apparatus can be comprised at low cost.

(Modification)
FIG. 6 is a schematic cross-sectional view of a deformation correction device for carrying out a combustor liner deformation correction method according to a modification of the third embodiment of the present invention.
In the present embodiment, the heater is configured by forming the tapered portion 20 of the deformation correcting jig 18 matched with the shape of the tapered portion 11 of the combustor liner 10 before deformation with a heating element material such as nichrome. A connecting portion 21 having an insulating structure is disposed on the outer peripheral surface of the tapered portion 20. As a material of the connection portion 21, for example, a ceramic coating or plate such as zirconia, silicon carbide, or alumina can be provided. In addition, the deformation correction jig 18 main body that supports the tapered portion 20 may be made of an insulating material, but is made of inexpensive carbon steel or the like, and is connected to the tapered portion 20 of the heating element material (connecting portion). 21 and the peripheral portion of the tapered portion 20) may be used as the insulating material.

  In this modification, the taper part of the deformation correction jig is configured as a heating part of the heating element material. Therefore, when the deformation part is deformed toward the inside of the combustor liner, the distance between the deformation part and the heating part. , And the deformed portion is preferentially heated by induction. As a result, the yield stress of the deformed portion is preferentially lowered, and the deformed portion can be preferentially deformed and corrected by the own weight of the deformation correcting jig contacting the deformed portion, thereby further improving the deformation correction of the combustor liner. can do.

  Moreover, in this modification, since the deformation correction jig also functions as a heater, there is no need to provide a separate heater, and the complexity of the work of installing the heater is improved, thereby improving work efficiency.

(Embodiment 4)
7A and 7B are views showing an apparatus for carrying out a combustor liner deformation correcting method according to Embodiment 4 of the present invention. FIG. 7A is a schematic sectional view of the deformation correcting apparatus, and FIG. The perspective view which shows the provided coil, (c) is BB sectional drawing of (b). In the present embodiment, a case where the tapered portion 11 of the combustor liner 10 is deformed mainly toward the outside of the cylindrical shape will be described.

  In the deformation correction apparatus according to the present embodiment, the constituent parts are basically the same as the constituent parts of the deformation correction apparatus according to the first embodiment, but their arrangement is different. That is, the combustor liner 10 is disposed on the pedestal 13 that is rotationally driven in the upside down direction with respect to the first embodiment. The position detection unit 14 is provided on the pedestal 13 and outside the combustor liner 10. Further, the high frequency induction heating coil 15 is disposed on the inner peripheral surface of the tapered portion 11 of the combustor liner 10, and shielding plates 16 a and 16 b are provided adjacent to the inner peripheral surface of the tapered portion 11. Further, a deformation correcting jig 22 is disposed on the outer peripheral surface of the tapered portion 11 so as to be in contact with the outer peripheral surface.

  The deformation correction jig 22 is made of a material having a strength that can sufficiently withstand the heating temperature during the deformation correction work, and is configured in a tapered shape that matches the outer peripheral surface shape of the tapered portion 11 before the deformation. The deformation correction jig 22 has a tapered portion 23 that contacts the tapered portion 11 of the combustor liner 10.

  As in the first embodiment, the deformation correction operation is performed by induction heating of the tapered portion 11 of the combustor liner 10 including the deformed portion 1, and the deformation correcting treatment having a shape that matches the shape of the tapered portion 11 of the combustor liner 10. The tool 22 is brought into contact with the tapered portion 11 of the combustor liner 10 that has been induction-heated to apply pressure. As a result, the yield stress of the base material of the tapered portion 11 of the combustor liner 10 including the deformed portion 1 in the gas turbine is reduced, and only the tapered portion 11 of the combustor liner 10 is deformed and corrected by the weight of the deformation correcting jig 22. it can.

  Accordingly, in the present embodiment, as in the first embodiment, only a part of the combustor liner including the deforming portion can be deformed and corrected, and the deformation correcting quality of the combustor liner can be improved.

  The coil may be a spring-shaped coil concentrically wound along the outer peripheral surface shape of the tapered portion 11 of the combustor liner 10, but the spiral coil as shown in FIGS. 7B and 7C. May be arranged on the outer peripheral surface of the deformation correction jig 18 divided by 180 degrees. Further, three may be arranged on the outer peripheral surface of the deformation correcting jig 18 divided by 120 degrees, or a plurality of pieces may be arranged separately. Further, it is possible to arrange one coil on the outer peripheral surface of the 360 ° deformation correction jig 18 without dividing.

  In this embodiment, when the deformation | transformation part is deform | transforming toward the outer side of a taper part, the distance of this deformation | transformation part and a coil becomes short, and a deformation | transformation part is induction-heated preferentially. As a result, the yield stress of the deformed portion is preferentially lowered, and the deformed portion can be preferentially deformed and corrected by the own weight of the deformation correcting jig contacting the deformed portion, thereby further improving the deformation correction of the combustor liner. can do.

  Further, in the present embodiment, when a plurality of coils are respectively disposed on the outer peripheral surface of the tapered portion of the combustor liner divided into a plurality, only the coil corresponding to the position where the deformed portion is formed is driven and the tapered portion is driven. The part can be partially induction heated. As a result, the deformation portion can be selectively changed and corrected, and the deformation correction of the combustor liner can be further improved.

(Modification 1)
FIG. 8: is sectional drawing which shows schematic structure of the deformation | transformation correction apparatus which concerns on the modification 1 of Embodiment 4 of this invention.
In this modification, the coil 15 is disposed on the inner peripheral surface of the deformation correction jig 22, and the tapered portion 11 is induction-heated through the deformation correction jig 22.

  When the deformation | transformation part 1 is deform | transforming toward the outer side of a taper part, the distance of this deformation | transformation part 1 and the coil 15 becomes short, and the deformation | transformation part 1 is induction-heated preferentially. As a result, in this modified example, the yield stress of the deformed portion is preferentially lowered, and the deformed portion can be preferentially deformed and corrected by the weight of the deformation correcting jig contacting the deformed portion. Deformation correction can be further improved.

(Modification 2)
FIG. 9: is sectional drawing which shows schematic structure of the deformation correction apparatus which concerns on the modification 2 of Embodiment 4 of this invention.
In this modification, the heater is configured by forming the taper portion 23 of the deformation correction jig 22 matched with the shape of the taper portion 11 of the combustor liner 10 before deformation from a heating element material such as nichrome. A connecting portion 24 having an insulating structure is disposed on the outer peripheral surface of the tapered portion 23.

  In this modification, the taper portion 23 of the deformation correction jig 22 is configured as a heating portion of the heating element material. Therefore, when the deformation portion is deformed toward the outside of the combustor liner, the deformation portion and the heating portion Thus, the deformed portion is preferentially heated by induction. As a result, the yield stress of the deformed portion is preferentially lowered, and the deformed portion can be preferentially deformed and corrected by the own weight of the deformation correcting jig contacting the deformed portion, thereby further improving the deformation correction of the combustor liner. can do.

  Moreover, in this modification, since the deformation correction jig also functions as a heater, there is no need to provide a separate heater, and the complexity of the work of installing the heater is improved, thereby improving work efficiency.

(Embodiment 5)
The case where the taper part 11 of this combustor liner 10 is deform | transforming toward the inner side and the outer side from the original cylindrical shape is demonstrated.

  10A and 10B are views showing an apparatus for carrying out a combustor liner deformation correcting method according to Embodiment 5 of the present invention. FIG. 10A is a schematic sectional view of the deformation correcting apparatus, and FIG. 10B is a deformation correcting jig 18. , 22 are enlarged sectional views. In FIG. 10A, the deformation of the tapered portion 11 of the combustor liner 10 is expressed by unevenness for convenience. However, as an actual deformation of the combustor liner 10, for example, in the cylindrical combustor liner 10 having an essentially circular cross section, it is assumed that the cross section has an elliptical shape or a shape close to a triangle. Such deformation of the shape is a case that is often recognized in reality.

  In the present embodiment, the deformation correcting jig 18 is disposed on the inner peripheral surface of the combustor liner 10 so as to be in contact with the inner peripheral surface, and the outer peripheral surface of the combustor liner 10 is in contact with the outer peripheral surface. A deformation correction jig 22 is arranged. Note that the pedestal 13, the position detection unit 14, and the deformation correction jig 18 shown in FIG. 10 are the same as those in the first embodiment shown in FIG.

  A coil 15 a for high frequency induction heating is disposed on the inner peripheral surface of the tapered portion 20 of the deformation correcting jig 18. The coil 15a is configured in a spring-shaped pattern, for example, concentrically wound along the inner peripheral surface of the tapered portion 11, and an alternating current is applied from a high-frequency circuit (not shown). The coil 15 a induction heats the combustor liner 10 from the inside of the combustor liner 10.

  The deformation correction jig 22 is the same as the deformation correction jig 22 of the fourth embodiment shown in FIG. 7, but as the combustor liner 10 is turned upside down, the deformation correction jig of the fourth embodiment is used. The pedestal 13 is disposed upside down with the tool 22. A high frequency induction heating coil 15 b is disposed on the inner peripheral surface of the tapered portion 23 of the deformation correcting jig 22. The coil 15b is configured, for example, in a spiral pattern along the inner peripheral surface of the tapered portion 11, and an alternating current is applied from a high-frequency circuit (not shown). The coil 15 b induction heats the combustor liner 10 from the outside of the combustor liner 10.

  In the present embodiment, the position detection unit 14 is not provided, but this is because the deformation correction jig 18 disposed on the pedestal 13 lowers the deformation correction jig 18 beyond the ideal position. Because there is no. Therefore, the deformation correction jig 18 can be managed to reach the final position by holding the load at a high temperature for a sufficient time. Of course, the position detection unit 14 may be provided to grasp the arrival position of the deformation correction jig 18.

  As described above, in the present embodiment, the combustor liner is heated from the inside and outside, and the combustor liner is sandwiched from the inside and outside by the two deformation correcting jigs, and the deformation of the tapered portion is corrected. Do. As a result, more complicated deformations can be easily corrected, and the deformation correction of the combustor liner can be further improved.

  Further, depending on the weight of the deformation correction jig, the combustor liner 10 is made upright, and the deformation correction jig 22 has a conical shape having a considerable weight and is inserted into the combustor liner 10 without being constrained. There is a need to. In this case, when the combustor liner is in contact with the pedestal, a portion of the combustor liner other than the tapered portion may be deformed by the weight of the deformation correcting jig.

  Therefore, in this embodiment, since the deformation correction jig is inserted into the combustor liner in a state where the combustor liner is not in contact with the pedestal, the weight of the deformation correction jig is not directly applied to the combustor liner, and leakage occurs. Even if the magnetic flux is not shielded or the combustor liner is not cooled, the portions of the combustor liner other than the tapered portion including the deformable portion can be prevented from being deformed by the weight of the deformation correcting jig.

(Modification)
The case where the combustor liner 10 is upside down from the case shown in the fifth embodiment of FIG. 10 will be described.
FIG. 11: is sectional drawing which shows schematic structure of the deformation correction apparatus which concerns on the modification of Embodiment 5 of this invention.

  In this modification, a deformation correction jig 22 is disposed on the outer peripheral surface of the combustor liner 10 so as to be in contact with the outer peripheral surface, and the inner peripheral surface of the combustor liner 10 is in contact with the inner peripheral surface. A deformation correction jig 32 is arranged. The deformation correction jig 22 is the same as the deformation correction jig 22 shown in the fifth embodiment, and a coil for high-frequency induction heating (not shown) is disposed on the inner peripheral surface of the tapered portion 23. The combustor liner 10 is induction-heated from the outside of the combustor liner 10.

  The deformation correction jig 32 has a substantially T-shaped cross section and is disposed on the pedestal 13. The deformation correction jig 32 has a tapered portion 33 that matches the shape of the inner peripheral surface of the tapered portion 11 before deformation. A coil for high-frequency induction heating (not shown) is disposed on the inner peripheral surface of the taper portion 33 in the same manner as the deformation correction jig 18 shown in the fifth embodiment, and combustion is performed from the inside of the combustor liner 10. The vessel liner 10 is induction heated.

Since the lowering of the deformation correction jig 22 is stopped by the deformation correction jig 32 disposed on the base 13, the deformation correction jig 22 does not go down beyond its ideal position.
The pedestal 13 is provided with a position detection unit 14 to grasp the arrival of the combustor liner 10.

  In this modification, even when the arrangement of the combustor liner shown in the fifth embodiment is turned upside down, it can be handled by changing the arrangement and shape of the deformation correction jig and the like. The effect of can be obtained. This modification is merely an example of the fifth embodiment, and various other arrangements and shapes can be changed.

(Embodiment 6)
A case will be described in which a load necessary for correcting the deformation of the combustor liner cannot be obtained with only the deformation correcting jig 18 and the weight disposed thereon.

FIG. 12 is a cross-sectional view showing a schematic configuration of a deformation correction apparatus according to Embodiment 6 of the present invention.
A feature of the present embodiment is that a hydraulic jack 30 is disposed on the deformation correction jig 18 and a fixed frame 31 for fixing the hydraulic jack 30 is disposed on the floor.
The hydraulic jack 30 applies a load necessary for correcting the deformation of the tapered portion 11 of the combustor liner 10 together with the deformation correcting jig 18 to the tapered portion 11.

  Thus, in this embodiment, since a load required for deformation correction of a deformation | transformation part can be applied using a hydraulic jack, a high load can be obtained and a deformation | transformation of a deformation | transformation part can be corrected rapidly.

  The hydraulic jack 30 can be a versatile, simple and inexpensive one. Further, the method of loading is not limited to the hydraulic jack 30, and for example, it is possible to load using an air compressor or an air cylinder.

(Modification)
FIG. 13: is sectional drawing which shows schematic structure of the deformation correction apparatus which concerns on the modification of Embodiment 6 of this invention.
In this modification, a case will be described in which deformation is corrected using powder 34 instead of the deformation correction jig 18 shown in the sixth embodiment of FIG.

  The deformation correction jig 22 is the same as the deformation correction jig 22 of the fifth embodiment shown in FIG. A coil 15 for high frequency induction heating is disposed on the inner peripheral surface of the tapered portion 23, and an alternating current is applied from a high frequency circuit (not shown). The coil 15 induction-heats the combustor liner 10 from the outside of the combustor liner 10.

  As the powder 34, an oxide powder having versatility such as alumina, zirconia, yttria and the like and suitable at a low cost is suitable, but silicon carbide or the like may be used. The powder 34 is filled in the tapered portion 11 of the combustor liner 10, and the upper and lower portions thereof are held by an upper holding jig 35 and a lower holding jig 36 disposed inside the combustor liner 10.

The upper holding jig 35 is disposed on the cylindrical shape side of the combustor liner 10 having a large diameter, and a disk having the same outer diameter as the inner diameter of the cylindrical shape side so that the powder 34 does not flow upward from the tapered portion 11. It is configured in shape. A hydraulic jack 30 similar to that of the sixth embodiment is disposed on the upper holding jig 35.
The hydraulic jack 30 applies a load necessary for correcting the deformation of the tapered portion 11 of the combustor liner 10 together with the upper holding jig 35 to the tapered portion 11.

  The lower holding jig 36 is disposed on the cylindrical shape side having a small diameter of the combustor liner 10, and a cylinder having the same outer diameter as the inner diameter on the cylindrical shape side so that the powder 34 does not flow downward from the tapered portion 11. It is configured in shape. The lower holding jig 36 is disposed on the base 13.

  In this modified example, the upper holding jig 35 is pushed down by the hydraulic jack 30 to apply a load necessary for correcting the deformation of the deforming portion 1 to the powder in the tapered portion 11 to correct the shape of the deforming portion 1.

  As described above, in this modification, a load necessary for correcting the deformation of the deforming portion can be applied to the powder using the hydraulic jack, so that a high load can be obtained and the deformation of the deforming portion can be corrected quickly. .

  In the above-described embodiment, the modification of the combustor liner has been described. However, the present invention is not limited to this, and the present invention can be used for modification of other gas turbine components such as transition pieces.

  In addition, this invention is not limited only to the said embodiment, You may deform | transform a component in the range which does not deviate from the summary in an implementation stage. In addition, various inventions can be configured by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

  DESCRIPTION OF SYMBOLS 1 ... Deformation part, 10 ... Combustor liner, 11, 20, 23, 33 ... Tapered part, 12 ... Rotation drive part, 13 ... Base, 14 ... Position detection part, 15, 15a, 15b ... Coil, 16a, 16b ... Shield plate, 17 ... high frequency circuit, 18, 22, 32 ... deformation correction jig, 19 ... control unit, 21,24 ... connecting portion, 30 ... hydraulic jack, 31 ... fixed frame, 34 ... powder, 35 ... upper holding jig Tool, 36 ... lower holding jig, 40 ... cold water pipe.

Claims (7)

Heating at least a portion including a deformed portion of the combustor liner;
Abutting a deformation correction member having a correction surface corresponding to the shape before deformation of the deformation portion on a side protruding from the shape before deformation of the deformation portion of the combustor liner;
Modifying the deforming portion by applying a pressing force to bring the deforming portion of the combustor liner into close contact with the deformation correcting member;
A combustor liner deformation correcting method comprising: Heating at least a portion including a deformed portion of the combustor liner;
Corresponding to a first deformation correction member having a correction surface corresponding to an inner shape of the deformed portion before deformation on both surfaces of the heated deformable portion of the combustor liner, and an outer surface shape of the deformable portion before deformation. A step of abutting a second deformation correction member having a correction surface for correcting the deformation portion by applying a pressing force to the first deformation correction member and the second deformation correction member;
A combustor liner deformation correction method, further comprising: The combustion according to claim 2, wherein the step of correcting the deformation portion further includes a step of detecting a correction state of the deformation portion based on a relative position between the combustor liner and the deformation correction member. Instrument liner deformation correction method. The combustor liner deformation correction method according to any one of claims 1 to 3, wherein the heating is performed by an induction heating unit. The combustor liner deformation according to claim 4, wherein the heating step is performed by interposing a shielding plate that shields magnetic flux between the induction heating unit and the heating unnecessary portion of the combustor liner. How to fix. The combustor liner deformation correction method according to any one of claims 1 to 5, wherein the heating step is performed while suppressing heat conduction to a heating unnecessary portion of the combustor liner. The combustor liner deformation correction method according to any one of claims 1 to 6, wherein the heating step is performed while cooling a heating unnecessary portion of the combustor liner.

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