WO2008026268A1

WO2008026268A1 - Generator and gas turbine power generation facility

Info

Publication number: WO2008026268A1
Application number: PCT/JP2006/317164
Authority: WO
Inventors: Yasushi Hayasaka
Original assignee: Hitachi, Ltd.
Priority date: 2006-08-31
Filing date: 2006-08-31
Publication date: 2008-03-06
Also published as: JP4808256B2; JPWO2008026268A1

Abstract

In order to provide a generator in which efficiency can be enhanced by reducing thrust acting on a thrust bearing, and a gas turbine power generation facility employing it, the stator of the generator is arranged to be able to move in the axial direction of the thrust bearing. When thrust is generated in the thrust bearing due to displacement of the magnetic centers of the stator and rotor of the generator, for example, the stator is moved in the axial direction to bring the magnetic centers of the stator and rotor closer to each other. When thrust is generated in the thrust bearing due to the difference in thrust force between a gas turbineand an air compressor, thrust is suppressed by utilizing magnetic attraction force between the stator and rotor of the generator and the thrust acting on the thrust bearing is reduced, as a result, thus reducing bearing loss and suppressing fall of efficiency.

Description

Specification

Generator and gas turbine power generation equipment using the same

Technical field

TECHNICAL FIELD [0001] The present invention relates to a generator and a gas turbine power generation facility using the same, and more particularly to a generator equipped with a thrust bearing and a gas turbine power generation facility using the same.

Background art

In recent years, as a gas turbine power generation facility, a micro gas turbine power generation facility has become widespread by connecting a rotating portion of a gas turbine, an air compressor, and a generator on one axis or the same axis. And this kind of gas turbine power generation equipment, in other words, as disclosed in Patent Document 1, for example, a force in the axial direction with respect to the rotating shaft, for example, due to magnetic influence or thermal influence during operation, can be changed. For example, thrust is generated, and at least one thrust bearing is provided to receive this thrust, so that the rotating shaft is not easily displaced in the axial direction by the thrust.

[0003] Patent Literature l: WO 01/86130 A1

Disclosure of the invention

Problems to be solved by the invention

[0004] The gas turbine power generation facility disclosed in Patent Document 1 described above is provided with a thrust bearing, so that axial displacement of the rotating shaft can be suppressed when thrust is generated. However, the thrust acting on the thrust bearing generates a large frictional force on the thrust bearing, which has been one of the factors that reduce the efficiency of gas turbine generator equipment. Furthermore, in order to reduce the frictional force, it is necessary to forcibly supply the lubricant to the thrust bearing, and it is necessary to secure a dedicated lubrication facility and lubricant supply power for that purpose, which is also a gas turbine. This was a factor that reduced the efficiency of the generator equipment. As described above, in this type of gas turbine power generation equipment, even a slight bearing loss due to friction generated in the thrust bearing greatly affects the efficiency, so it is desirable not to apply a large thrust.

[0005] An object of the present invention is to provide a generator capable of reducing the thrust acting on the thrust bearing and improving the efficiency, and a gas turbine power generation facility using the generator.

Means for solving the problem In order to achieve the above object, the present invention is configured such that the stator of the generator can be moved in the axial direction with respect to the thrust bearing.

The invention's effect

[0007] In this way, by moving the stator of the generator in the axial direction with respect to the thrust bearing, for example, the magnetic attraction force generated by the displacement of the magnetic center between the stator and the rotor is reduced. Therefore, when thrust is generated in the thrust bearing, the stator is moved in the axial direction so that the magnetic centers of the rotor and the stator are close to each other, and the magnetic attractive force is reduced to suppress the thrust. Also, when thrust is generated in the thrust bearing due to the difference in thrust force between the gas turbine and the air compressor, the rotor is pulled in the direction to reduce the thrust by using the magnetic attractive force between the stator and the rotor. In this way, the thrust is suppressed, and as a result, the thrust acting on the thrust bearing is reduced, bearing loss is reduced, and the decrease in efficiency is suppressed.

Brief Description of Drawings

[0008] FIG. 1 is a partially longitudinal side view showing a first embodiment of a gas turbine power generation facility according to the present invention.

FIG. 2 is a partial longitudinal side view of a generator showing a second embodiment of a gas turbine power generation facility according to the present invention.

FIG. 3 is a control block diagram for driving the stator based on estimation of thrust generated in the thrust bearing.

FIG. 4 is a partial longitudinal side view of a generator showing a third embodiment of a gas turbine power generation facility according to the present invention.

FIG. 5 is a partial longitudinal side view of a generator showing a fourth embodiment of a gas turbine power generation facility according to the present invention.

Explanation of symbols

[0009] 1 ... gas turbine power generation equipment, 2 ... gas turbine, 3 "compressor, 4 ... generator, 5 ... rotating shaft, 6 ... turbine blade, 7 ... turbine inner casing, 8 ... turbine outer casing, 9 ... "Compressed blades, 10 ... compressor casing, 11 ... support. 12 ... Ground, 13 ... Shaft collar, 14 ... Rotor, 15 ... Stator, 16 ... Rotor core, 17 ... Permanent magnet, 18 ... Holding cylinder, 19A, 19B , 24A, 24Β ··· End plate, 20 "Nut, 21 ··· Stator core, 22 ··· Stator wire, 23" Child frame, 25A, 25Β · End, bracket, ··········································, 31A, 31Β ··· Thrust member, 32 ··· Radial member, 33 ··· Inside radial member, 34 ··· Outside radial member, 35 ··· Connecting member, 36A, 36B ... Elastic body, 37A, 37B ... Damping means, 38 ... Low friction material, 39, 47, 50 ... Position adjusting mechanism, 40 ... Screw hole, 40mm ... Through hole, 41 ... Adjust bolt, 42 ... Double nut , 43A, 43Β ··· Calo-heavy sensor, 44A, 44 温度 ··· Temperature sensor, 45 ··· Processing device, 46 ··· Display device, 48 ··· Piston, 49 ··· Drive means, 51 ··· Flexible container, 52 ··· Pipe line, 53 ··· Pressurizing means, 54 ··· Solenoid valve Best mode for carrying out the invention

Hereinafter, a first embodiment of a gas turbine power generation facility according to the present invention will be described with reference to FIG.

The gas turbine power generation facility 1 in the present embodiment is configured such that the gas turbine 2, the compressor 3, and the generator 4 are arranged in the axial direction around a common rotating shaft 5.

[0012] The gas turbine 2 guides and supplies the turbine blades 6 fixed on the rotating shaft 5 and the combustion blades combusted by a soot combustor (not shown) to the turbine blades 6 to guide the exhaust. A turbine inner casing 7 and a turbine outer casing 8 are provided.

[0013] The compressor 3 includes a compressor blade 9 fixed on the rotary shaft 5, and a compressor casing 10 that supplies combustion air to the compressor blade 9 and discharges the compressed combustion air. Yes.

The turbine inner casing 7 and the turbine outer casing 8 and the compressor casing 10 are integrally connected by known fastening means such as bolts and nuts, and the rotating shaft 5 is connected by a common support base 11. It is fixed to the ground 12 so that it is horizontal.

On the other hand, the generator 4 includes a rotor 14 abutted on the other end of a shaft collar 13 abutted on one end of the compressor blade 9 on the outer peripheral portion of the rotating shaft 5, and this rotation. A stator 15 is disposed on the outer peripheral side of the child 14 via a gap.

The rotor 14 includes a rotor core 16 formed by laminating silicon steel plates in the axial direction, a plurality of permanent magnets 17 installed so as to form a plurality of magnetic poles in the circumferential direction on the outer periphery thereof, A holding cylinder 18 such as a non-magnetic metal cylinder made of nickel base alloy or an insulating cylinder made of fiber reinforced plastic, which is mounted to hold the permanent magnet 17 on the rotor core 16, and these are axially mounted. And end plates 19A and 19B sandwiched from opposite sides.

[0017] The turbine blade 6, the compression blade 9, and the rotor 14 having the above-described configuration are coupled by screwing a nut 20 into one end of the rotating shaft 5 and fastening the nut.

The stator 15 includes a stator core 21 and a stator winding attached to the stator core 21.

With 22!

[0019] The outer periphery of the stator core 21 is covered with a stator frame 23. The stator core 21 is supported so as not to rotate in the circumferential direction with respect to the stator frame 23. Is supported so that it can move. Both sides of such a stator frame 23 are closed by end plates 24A and 24B, and end brackets 25A and 25B are positioned outside the stator frames 23, end plates 24A and 24B and end plates. The brackets 25A and 25B are integrally fixed with bolts 26 and nuts 27.

[0020] A thrust bearing 28 is formed between the end plate 24A and the end bracket 25A and the shaft collar 13, and between the end plate 24B and the end bracket 25B and the outer periphery of the end plate 19B. A radial bearing 29 is formed. The thrust bearing 28 is supported by an inner bearing member 30 having an outer peripheral surface concentric with the rotary shaft 5 and a disk protruding from the outer peripheral surface in a direction perpendicular to the rotary shaft 5, and the end plate 24A and the end bracket 25A. Thrust members 31A and 31B facing the disk surfaces on both sides of the disk formed on the inner bearing member 30, and radial members 32 supported by the end bracket 25A and facing the outer peripheral surface of the inner bearing member 30. ing. The radial bearing 29 has an inner radial member 33 provided on the outer peripheral surface of the end plate 19B and an outer radial member 34 opposed to the outer peripheral surface of the inner radial member 33 and supported by the end plate 24B. And then.

Then, the generator 4 is cantilevered by the support base 11 by connecting the end bracket 25A and the compressor casing 10 with a connecting member 35.

[0022] During operation of the gas turbine power generation facility 1 configured as described above, the compressor 3 sucks the combustion air as indicated by the arrow A and compresses it with the compression blades 9, and the compressed combustion air is provided separately as indicated by the arrow B. Supply to the regenerator and heat. The compressed combustion air heated by the regenerator is introduced between the turbine inner casing 7 and the turbine outer casing 8 of the gas turbine 2 as indicated by an arrow C, and then the compressed combustion air and fuel are mixed and burned by the combustor. Inside the turbine as shown by arrow D The gas is supplied into the casing 7 to rotate the turbine blade 6 and exhausted as shown by an arrow E.

As the turbine blade 6 rotates, the compressor blade 9 coaxial with the turbine blade 6 and the rotor 14 of the generator 4 also rotate. The generator 1 induces an alternating current in the stator winding 22 by the rotation of the rotor 14. The induced alternating current is, for example, once converted into a direct current by the conversion means, and then converted again into an alternating current by another conversion means and supplied to the demand side.

[0024] In such a gas turbine power generation facility 1, for example, due to an error in manufacturing and assembly of the generator 4, the axial magnetic center C1 of the rotor 14 and the thrust bearing 28 are specified. The rotor 14 may be assembled with the magnetic center C2 shifted. In such a case, during the operation of the gas turbine power generation facility 1, an axial magnetic attractive force acts between the rotor 14 and the stator 15. The magnetic attractive force G is a magnetic attractive force acting on the rotor 14, and the magnetic attractive force H is a magnetic attractive force acting on the stator 15.

[0025] When such magnetic attraction forces H, G are applied, the rotor 14 is normally forced in the right direction in the figure to press the disk of the inner bearing member 30 against the thrust member 31A, that is, As the thrust increases and the frictional force increases, bearing loss increases.

[0026] However, in the present embodiment, the stator core 21 is configured to move in the axial direction with respect to the stator frame 23 in the present embodiment, so that when the magnetic attraction force is generated, Due to the magnetic attraction force, the entire stator 15 is displaced leftward in the figure. Due to the axial displacement of the stator 15, the magnetic attraction force between the rotor 15 and the rotor 14 is reduced, and as a result, the thrust for pressing the disk of the inner bearing member 30 against the thrust member 31 A is also reduced. Along with this, the frictional force of the thrust bearing 28 is also reduced, so that the bearing loss can be reduced and the efficiency of the generator 4 can be prevented from lowering.

[0027] In the above-described embodiment, the stator 15 is suddenly displaced by the magnetic attractive force when the generator 4 is started. Therefore, the stator core 21 may collide with the end plate 14A due to its inertia. is there. In this case, for example, an elastic body 36A, 36B such as a leaf spring or a coil spring having a small spring constant is interposed between both ends of the stator core 21 in the axial direction and the end plates 24A, 24B. The collision of the stator core 21 with the end plates 24A and 24B without hindering the axial displacement of the child 15 can be prevented.

[0028] Incidentally, the spring constants of the elastic bodies 36A, 36B are the above-described magnetic attractive force, the rotor 14 and the fixed body. It can be determined by the deviation of the magnetic center in the axial direction of the stator 15 and can be expressed as kl + k2≤FZd. Here, kl is the spring constant of the elastic body 36A, k2 is the spring constant of the elastic body 36B, F is the magnetic attractive force, and d is the deviation of the magnetic center in the axial direction of the rotor 14 and the stator 15.

FIG. 2 shows a second embodiment of the gas turbine power generation facility according to the present invention. The same reference numerals as those in FIG. 1 denote the same components, and thus detailed description thereof is omitted.

[0030] In the second embodiment, the first configuration different from the first embodiment is that elastic bodies 36A, 36B are disposed between the axial ends of the stator core 21 and the end plates 24A, 24B. For example, it has a configuration in which damping means 37A and 37B such as a high-viscosity, fluid-filled flexible container or an oil damper are interposed. By interposing the damping means 37A, 37B, it is possible to prevent the stator 15 supported on both sides by the elastic bodies 36A, 36B having a small spring constant from vibrating in the axial direction as the rotor 14 rotates. it can.

[0031] A second configuration different from that of the first embodiment is that a low friction material 38 is interposed between the stator core 21 and the stator frame 23 so that the axial displacement of the stator 15 is reduced. This is an easy configuration. As the low friction material 38, a cylindrical body molded from a fluorocarbon fiber reinforced plastic and made to slide by contacting the outer peripheral surface of the stator core 21, or an outer peripheral surface of the stator core 21 molded from the same material. There are rail bodies that slide in contact with multiple locations, and the rail bodies are installed over the entire length of the stator frame 23 in the axial direction, and are installed on the inner diameter side of the stator frame 23 at intervals in the circumferential direction. It is.

A third configuration different from that of the first embodiment is a configuration in which a position adjustment mechanism 39 that adjusts the position of the stator 15 in the axial direction is provided. The position adjustment mechanism 39 includes a screw hole 40 provided in the end plate 24B in the axial direction, an adjustment bolt 41 screwed into the screw hole 40 and connected to the stator core 21, and protruded outside the screw hole 40. A double nut 42 screwed into the adjusting bolt 41 is used. By rotating the adjustment bolt 41 to the left and right, it is possible to adjust the position by moving the stator core 21 in the axial direction.After adjusting the position, screw the double nut 42 to fix the adjustment position. Can do.

Incidentally, as a method of adjusting the axial position of the stator 15, the thrust members 31A and 31B are provided with the calorie weight sensors 43A and 43B and the temperature sensors 44A and 44B, and the output signals thereof are as shown in FIG. Lead to the arithmetic processing unit 45, measure the thrust received by the thrust members 31A, 31B, Also, the thrust acting on the thrust bearing 28 is estimated based on the temperature. Here, the weight sensors 43A and 43B, the temperature sensors 44A and 44B, and the arithmetic processing unit 45 constitute a thrust measuring means according to the present invention.

[0034] Then, the thrust is displayed on the display device 46, and the operator looks at the display device 46 and rotates the adjustment bolt 41 so that the measured value is within the appropriate range, thereby moving the stator 15 in the axial direction. The position is moved and fixed, and fixed with a double nut 42. Specifically, the axial position of the stator 15 is adjusted so that the calculated thrust is in the vicinity of “zero”. Further, it is desirable to provide three sets of the position adjusting mechanisms 39 at intervals in at least the circumferential direction so that the stator core 21 can smoothly move in the axial direction without tilting in the stator frame 23. Further, when the position adjusting mechanism 39 is provided, it is not necessary to provide the elastic bodies 36A and 36B and the damping means 37A and 37B.

[0035] As described above, the operator manually adjusts the stator 15 with respect to the stator frame 23 in the axial direction, thereby reducing the thrust acting on the thrust members 31A and 31B of the thrust bearing 28. The bearing loss can be reduced, and as a result, the efficiency of the generator and the gas turbine power generation facility using the generator can be improved.

Next, a third embodiment of the gas turbine power generation facility according to the present invention will be described with reference to FIG. The same reference numerals as those in FIGS. 1 and 2 indicate the same components, and detailed description thereof will not be repeated.

In the present embodiment, the position adjusting mechanism 39 using the adjusting bolt 41 and the double nut 42 in the second embodiment is replaced with a position adjusting mechanism 47 using a piston 48 and its driving means 49. Then, one end of the piston 48 is connected to the end of the stator core 21 through a through hole 40A provided in the end plate 24B, and the piston 48 is advanced and retracted in the axial direction by the driving means 49, so that the thrust member 31A, The position of the stator 15 in the axial direction is adjusted so that the thrust received by 31B is within the appropriate range. By the way, the drive means 49 is not limited in its kind as long as it drives the piston 48 in the axial direction to advance and retreat. For example, it supplies and discharges fluid such as water, air and oil. Well-known driving means such as a fluid cylinder for driving the piston 48, a magnetic driving means for magnetically driving the piston 48, and a rotational driving means for driving the piston 48 by rotating a screw can be used. Then, as shown in FIG. 3, such driving means 49 is driven based on weight sensors 43A, 43B and temperature sensors 44A, 44B provided on the thrust members 31A, 31B and the arithmetic processing unit 45. Thus, the axial position of the stator 15 can be automatically adjusted. Specifically, as in the second embodiment, the output signals of the weight sensors 43A and 43B and the temperature sensors 44A and 44B are processed by the arithmetic processing unit 45, and the thrust force received by the thrust member 31 A and 31B force S And the thrust acting on the thrust bearing 28 is estimated based on the temperature. Then, a drive command is given to the drive means 49 so that the thrust value is in the vicinity of the zero value of the thrust force, the piston 48 is advanced and retracted, and the axial position of the stator 15 is automatically adjusted.

Furthermore, a fourth embodiment of the gas turbine power generation facility according to the present invention will be described with reference to FIG. The same reference numerals as those in FIGS. 1 to 3 indicate the same components, and detailed description thereof will not be repeated.

In the present embodiment, another position adjusting mechanism 50 is provided in place of the position adjusting mechanisms 39 and 47 according to the second and third embodiments. This position adjustment mechanism 50 is connected across the end of the stator core 21 and the end plate 24B, and a flexible container 51 such as a diaphragm that changes the volume by supplying and discharging fluid, and this For example, a conduit 52 that supplies and discharges fluid such as air, oil, and water to the flexible container 51, pressurizing means 53 that pressurizes and supplies the fluid connected to the conduit 52, and the conduit 52 For example, an electromagnetic valve 54 having a two-way switching function for adjusting the pressure of the fluid supplied and discharged.

[0041] Then, the opening degree of the electromagnetic valve 54 is set to the weight sensors 43A, 43B and the temperature sensor 44A provided in the thrust members 31A, 31B in the same manner as in the second and third embodiments. The fluid is supplied to and discharged from the flexible container 51 by changing it based on the output signal of the 44B force. By supplying and discharging the fluid into the flexible container 51, the stator 15 can be moved in the axial direction to adjust the position.

[0042] Processing of output signals from the weight sensors 43A and 43B and the temperature sensors 44A and 44B is performed in the same manner as in the second and third embodiments. That is, as shown in FIG. 3, the arithmetic processing unit 45 uses the output signals from the weight sensors 43A and 43B and the temperature sensors 44A and 44B. Then, the thrust applied to the thrust members 31A and 31B is measured, and the thrust acting on the thrust bearing 28 is estimated based on the temperature. Then, a two-way switching command or an opening command is given to the solenoid valve 54 so that the thrust value is close to zero, and the fluid is supplied to or discharged from the flexible container 51 and fixed. The position of the child 15 in the axial direction is automatically adjusted.

By the way, in each of the above embodiments, the thrust force of the thrust bearing 28 generated by the magnetic inconvenience of the generator 4 is reduced. However, looking at the gas turbine power generation facility 1 as a whole, different magnitudes of thrust in different directions also act on the gas turbine 2 and the compressor 3 due to differences in the direction and shape of the turbine blade 6 and the compression blade 9. Since the thrust acts on the thrust bearing 28 also by such a difference in thrust between the gas turbine 2 and the compressor 3, the thrust acting on the thrust bearing 28 including the thrust by the gas turbine 2 and the compressor 3 should be reduced. Is desirable.

Therefore, as shown in the second to fifth embodiments, weight sensors 43A and 43B and temperature sensors 44A and 44B are provided, and the gas turbine 2 acting on the thrust bearing 28 and the compression are measured from these measured values. If the total thrust of the mechanical thrust by the machine 3 and the magnetic thrust by the generator 4 is measured by the processor 45 and the stator 15 is adjusted manually or automatically in the axial direction so as to reduce the sum of these thrusts. Good. Note that the mechanical thrust generated by the gas turbine 2 and the compressor 3 changes depending on changes in the rotational speed, generator output, and outside air temperature, so the position of the stator 15 is simply changed when the total thrust exceeds the allowable value. Adjustment may be made to reduce the total thrust within an allowable value, or the total thrust during the most frequent operation may be reduced by adjusting the position of the stator 15.

[0045] As described above, according to the present embodiment, it is possible to obtain a generator capable of reducing the thrust acting on the thrust bearing and improving the efficiency, and a gas turbine power generation facility using the generator. .

Incidentally, in the above embodiment, the permanent magnet 17 is used as the rotor 14 of the generator 4. However, instead of using the permanent magnet 17, a rotor wire may be attached to the rotor core 16, and an excitation current may be supplied to the rotor wire.

Industrial applicability The present invention is essential for improving the efficiency of a generator or a gas turbine power generation facility equipped with a thrust bearing.

Claims

The scope of the claims

[1] A rotor that is rotatably supported on both sides in the axial direction via a bearing, a stator that is disposed on the outer periphery of the rotor via a circumferential clearance, and a stator that supports the stator A generator using a thrust bearing as one of the bearings, wherein the stator is supported so as to be movable in the axial direction with respect to the stator frame.

[2] A rotor rotatably supported on both sides in the axial direction via a bearing, a stator disposed on the outer periphery of the rotor via a circumferential clearance, and a stator that supports the stator In a generator using a thrust bearing as one of the bearings, the stator is supported so as to be movable in the axial direction with respect to the stator frame, and the axial position of the stator is adjusted. A generator characterized in that a position adjusting mechanism is provided.

[3] A rotor rotatably supported on both sides in the axial direction via bearings, a stator disposed on the outer periphery of the rotor via a circumferential clearance, and a stator that supports the stator In a generator having a frame and using a thrust bearing as one of the bearings, the stator is supported so as to be axially movable with respect to the stator frame, and a thrust acting on the thrust bearing is measured. A generator comprising: a thrust measuring means; and a position adjusting mechanism for adjusting an axial position of the stator based on a measurement result of the thrust measuring means.

[4] The generator according to any one of claims 1 to 3, wherein the stator is elastically supported in the axial direction with respect to the stator frame.

[5] The generator according to any one of claims 1 to 3, wherein the stator is damped in axial movement by damping means.

[6] In any one of claims 1 to 3, the stator is elastically supported in the axial direction with respect to the stator frame, and the movement in the axial direction is attenuated with respect to the stator frame by damping means. A generator characterized by being beaten!

7. The generator according to claim 1, wherein the stator is supported by the stator frame via a low friction material.

[8] A rotor that is rotatably supported on both sides in the axial direction via a bearing, a stator that is disposed on the outer periphery of the rotor via a circumferential clearance, and a stator that supports the stator Frame and A generator using a thrust bearing as one of the bearings, and a gas turbine power generation facility in which a rotating portion of the generator, the gas turbine, the compressor, and the generator is mounted on a common shaft. A gas turbine power generation facility, wherein a stator is supported so as to be movable in an axial direction with respect to the stator frame.

[9] A rotor that is rotatably supported on both sides in the axial direction via a bearing, a stator that is disposed on the outer periphery of the rotor via a circumferential clearance, and a stator that supports the stator A generator using a thrust bearing as one of the bearings, and a gas turbine power generation facility in which a rotating portion of the generator, the gas turbine, the compressor, and the generator is mounted on a common shaft. The stator of the generator is supported so as to be movable in the axial direction with respect to the stator frame, and thrust measuring means for measuring the thrust acting on the thrust bearing is provided, and the fixing is performed based on the measurement result of the thrust measuring means. A gas turbine power generation facility provided with a position adjusting mechanism for adjusting the position of the child in the axial direction.

10. The gas turbine power generation facility according to claim 8, wherein the stator is elastically supported in the axial direction with respect to the stator frame.

[11] The gas turbine power generation facility according to any one of claims 8 and 9, wherein the stator is attenuated in axial movement by a damping means.

[12] In any one of claims 8 and 9, the stator is elastically supported in the axial direction with respect to the stator frame, and the movement in the axial direction is attenuated with respect to the stator frame by a damping means. A gas turbine power generation facility characterized by the above.

13. The gas turbine power generation facility according to claim 8, wherein the stator is supported by the stator frame via a low friction material.