Deformation adjusting method for lower half indoor unit room

Abstract

The invention provides a deformation adjusting method for a lower half indoor unit room. The lower half indoor unit room is provided with a semicircular lower half indoor unit room main body and an indoor unit room accessory part arranged on the lower half indoor unit room main body. The indoor unit room accessory part is provided with a protruding part, and the protruding part protrudes closer to the radial outer side than the lower half indoor unit room main body and protrudes closer to the upper side than the lower contact surface of the lower half indoor unit room main body. In this method for adjusting the deformation of the lower half indoor unit room in the rotary machine, the following steps are executed: a preparation step for preparing a deformation adjustment device having an indoor unit room-side member that can be attached so as not to be relatively movable in the radial direction with respect to the protruding part; a device arrangement step in which the inner unit room-side member is attached to the protruding portion and the deformation adjustment device is arranged around the protruding portion; and a deformation adjustment step for pressing the inner unit chamber-side member attached to the protrusion toward the inside in the radial direction.

Description

Technical Field

[0001] The invention relates to a deformation adjustment method for a lower inner machine room in a rotating machine.

[0002] This application claims priority based on Japanese Patent Application No. 2022-159915 filed in Japan on October 4, 2022, and the contents are incorporated herein by reference. Background Art

[0003] Rotating machines such as steam turbines and gas turbines usually include: a rotor that can rotate around an axis extending in the horizontal direction; an inner machine room that covers the outer periphery of the rotor; and an outer machine room that covers the outer periphery of the inner machine room. The inner machine room includes: a lower half inner machine room that is semicircular with the axis as the center and covers the portion of the rotor that is lower than the axis; and an upper half inner machine room that is semicircular with the axis as the center and covers the portion of the rotor that is higher than the axis. The outer machine room includes: a lower half outer machine room that is semicircular with the axis as the center and covers the outer periphery of the lower half inner machine room; and an upper half outer machine room that is semicircular with the axis as the center and covers the outer periphery of the upper half inner machine room.

[0004] In the above-mentioned rotary machine, the inner machine room may be deformed over time due to its own weight or thermal effects. If the inner machine room is deformed, it may be difficult to disassemble the rotary machine. Therefore, the following patent document 1 discloses a technique for adjusting the deformation of the inner machine room using a deformation adjustment device.

[0005] The deformation adjustment device has: an inner chamber side member mounted on the lower inner chamber as the lower blade ring; an outer chamber side member mounted on the lower outer chamber arranged on the outer peripheral side of the lower inner chamber; and a rod for adjusting the distance between the inner chamber side member and the outer chamber side member. The lower inner chamber has: a lower contact surface extending in the horizontal direction so as to be in contact with the upper inner chamber; and a bolt hole recessed in the vertical direction from the lower contact surface. The lower outer chamber has: a lower contact surface extending in the horizontal direction so as to be in contact with the upper outer chamber; and a bolt hole recessed in the vertical direction from the lower contact surface. The inner chamber side member is mounted on a fastening bolt, a part of which is inserted through the bolt hole of the lower inner chamber and protrudes upward from the lower contact surface of the lower inner chamber. In addition, the outer chamber side member is mounted on a fastening bolt, a part of which is inserted through the bolt hole of the lower outer chamber and protrudes upward from the lower contact surface of the lower outer chamber. An external thread is formed at the front end of the rod. In addition, an internal thread into which the external thread of the rod can be screwed is formed on the outer chamber side member. In this technology, by adjusting the screwing amount of the rod relative to the outer chamber side member, the distance between the inner chamber side member and the outer chamber side member is adjusted, and the deformation of the lower half inner chamber to which the inner chamber side member is mounted is adjusted.

[0006] Previous technical literature

[0007] Patent Literature

[0008] Patent Document 1: International Publication No. 2020 / 036120 Summary of the invention

[0009] Technical issues to be solved by the invention

[0010] In the technique described in the above-mentioned Patent Document 1, since the inner chamber side member of the deformation adjustment device is mounted on the fastening bolt protruding from the lower contact surface of the lower inner chamber, when the deformation of the lower inner chamber is adjusted using the deformation adjustment device, the inner chamber side member of the deformation adjustment device is present on the lower contact surface of the lower inner chamber. Therefore, in the technique described in the above-mentioned Patent Document 1, there is a problem that it is extremely troublesome to connect the upper inner chamber to the lower inner chamber while the deformation of the lower inner chamber is being adjusted.

[0011] Therefore, an object of the present invention is to provide a method for adjusting deformation of a lower inner chamber, which can easily connect an upper inner chamber to the lower inner chamber while adjusting deformation of the lower inner chamber.

[0012] Means for solving technical problems

[0013] A method for adjusting deformation of a lower inner chamber according to one embodiment of the invention for achieving the above-mentioned object is applicable to the following rotating machines.

[0014] The rotary machine includes: a rotor rotatable around an axis extending in a horizontal direction; an inner machine chamber covering the outer periphery of the rotor; and an outer machine chamber covering the outer periphery of the inner machine chamber. The inner machine chamber includes: a lower half inner machine chamber, which is semi-arc shaped around the axis and covers a portion of the rotor below the axis; and an upper half inner machine chamber, which is semi-arc shaped around the axis and covers a portion of the rotor above the axis. The outer machine chamber includes: a lower half outer machine chamber, which is semi-arc shaped around the axis and covers the outer periphery of the lower half inner machine chamber; and an upper half outer machine chamber, which is semi-arc shaped around the axis and covers the outer periphery of the upper half inner machine chamber. The lower half inner machine chamber includes: a lower half inner machine chamber main body, which is semi-arc shaped around the axis and covers a portion of the rotor below the axis; and an inner machine chamber attachment provided on the lower half inner machine chamber main body. The lower half inner chamber body has lower contact surfaces at both ends of the circumferential direction relative to the axis, which can contact the upper half inner chamber as it expands in the horizontal direction. The inner chamber attachment has a protrusion, which protrudes radially outward relative to the axis from the lower half inner chamber body and protrudes upward from the lower contact surface.

[0015] In the deformation adjustment method of the lower half inner machine room in the above rotating machinery, the following steps are performed: a preparation step of preparing a deformation adjustment device, the deformation adjustment device having an inner machine room side component that can be installed relative to the protrusion in a radial direction relative to the axis without being able to move relatively; a device configuration step of installing the inner machine room side component on the protrusion, and configuring the deformation adjustment device having the inner machine room side component around the protrusion; and a deformation adjustment step of pushing the inner machine room side component installed on the protrusion toward the radial inside relative to the axis, or pulling the inner machine room side component toward the radial outside.

[0016] In this method, since the deformation of the lower half inner machine room can be adjusted, it is possible to avoid undesirable situations such as the lower half inner machine room contacting the rotor during disassembly or assembly of the rotary machine. In addition, in this method, when the deformation of the lower half inner machine room is adjusted using the deformation adjusting device, the deformation adjusting device does not exist on the lower contact surface of the lower half inner machine room, so the upper half inner machine room can be easily connected to the lower half inner machine room during deformation adjustment.

[0017] Effects of the Invention

[0018] According to one aspect of the present invention, the upper half inner chamber can be easily connected to the lower half inner chamber even in a state where the deformation or position of the lower half inner chamber is adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic cross-sectional view of a rotary machine in one embodiment of the present invention.

[0020] Figure 2 It is a cross-sectional view of a main part of a rotary machine in one embodiment according to the present invention.

[0021] Figure 3 It is an explanatory diagram showing a first deformation mode of the lower inner chamber in one embodiment of the present invention.

[0022] Figure 4 It is an explanatory diagram showing a second deformation form of the lower inner chamber in one embodiment of the present invention.

[0023] Figure 5 This is a flowchart showing a deformation adjustment method of the lower half inner chamber in the first embodiment according to the present invention.

[0024] Figure 6 This is a plan view showing the arrangement of the deformation adjusting device when the dimension in the left-right direction of the lower half inner chamber becomes longer during deformation in the first embodiment according to the present invention.

[0025] Figure 7 yes Figure 6Sectional view along line VII-VII.

[0026] Figure 8 yes Figure 6 Sectional view along line VIII-VIII in FIG.

[0027] Fig. 9 This is a cross-sectional view showing the arrangement of the deformation adjusting device when the dimension in the up-down direction of the lower half inner chamber is lengthened during deformation in the first embodiment according to the present invention.

[0028] Fig.10 It is a plan view showing the arrangement of the deformation adjusting device when the dimension in the left-right direction of the lower inner chamber becomes longer during deformation in the second embodiment according to the present invention.

[0029] Fig.11 yes Fig.10 XT-XT line section view.

[0030] Fig.12 yes Fig.10 Sectional view along line XII-XII in FIG.

[0031] Fig.13 It is a plan view showing the arrangement of the deformation adjusting device when the dimension in the up-down direction of the lower half inner chamber is lengthened during deformation in the second embodiment according to the present invention.

[0032] Fig.14 yes Fig.13 Sectional view along line XIV-XIV in FIG. DETAILED DESCRIPTION

[0033] Hereinafter, various embodiments of the present invention and their modified examples will be described in detail with reference to the drawings. Before describing an embodiment of a "deformation adjustment method for a lower half inner chamber", an embodiment of a rotary machine to which the method is applied will be described.

[0034] "Implementation Methods of Rotating Machinery"

[0035] refer to Figure 1 to Figure 4 , an implementation method of the rotating machinery is described.

[0036] The rotating machine in this embodiment is, for example, a gas turbine. Figure 1As shown, the rotary machine comprises: a rotor 10, which is rotatable around an axis Ar extending in the horizontal direction; a plurality of stationary blades 15; an inner machine room 20, which covers the outer periphery of the rotor 10; and an outer machine room 30, which covers the outer periphery of the inner machine room 20. Here, the direction in which the axis Ar extends is set as the axial direction Da, the direction perpendicular to the axis Ar is set as the radial direction Dr, and the circumferential direction relative to the axis Ar is simply set as the circumferential direction Dc. In addition, in the radial direction Dr, the side close to the axis Ar is set as the radial inner side Dri, and the side opposite thereto is set as the radial outer side Dro. Moreover, the radial Dr and vertical direction is set as the up-down direction Dv.

[0037] The rotor 10 includes a rotor shaft 11 extending in an axial direction Da with the axis Ar as the center, and a plurality of blade rows 12 attached to the rotor shaft 11. The plurality of blade rows 12 are arranged in the axial direction Da. The plurality of blade rows 12 each includes a plurality of blades 13 arranged in the circumferential direction Dc.

[0038] The plurality of stationary blade cascades 15 are arranged in the axial direction Da and are mounted on the inner peripheral side of the inner machine room 20. Therefore, the inner machine room 20 is sometimes referred to as a blade ring. The plurality of stationary blade cascades 15 each have a plurality of stationary blades 16 arranged in the circumferential direction Dc.

[0039] The internal machine case 20 includes an upper half internal machine case 22u, a lower half internal machine case 22d, and a plurality of internal machine case fastening bolts 21 for fastening the upper half internal machine case 22u and the lower half internal machine case 22d. The upper half internal machine case 22u is formed in a semicircular arc shape with the axis Ar as the center, and covers a portion of the rotor 10 that is closer to the upper side Dvu than the axis Ar. The lower half internal machine case 22d is formed in a semicircular arc shape with the axis Ar as the center, and covers a portion of the rotor 10 that is closer to the lower side Dvd than the axis Ar.

[0040] The outer machine chamber 30 includes an upper outer machine chamber 32u, a lower outer machine chamber 32d, and a plurality of outer machine chamber fastening bolts 31 for fastening the upper outer machine chamber 32u and the lower outer machine chamber 32d. The upper outer machine chamber 32u is semicircular with the axis Ar as the center, and covers the outer circumference of the upper inner machine chamber 22u. The lower outer machine chamber 32d is semicircular with the axis Ar as the center, and covers the outer circumference of the lower inner machine chamber 22d.

[0041] like Figure 1 and Figure 2As shown, the lower half inner machine room 22d has a lower half inner machine room main body 23 and a plurality of inner machine room attachments 26. The lower half inner machine room main body 23 is in a semicircular arc shape with the axis Ar as the center, and covers a portion of the rotor 10 that is closer to the lower side Dvd than the axis Ar. The plurality of inner machine room attachments 26 are provided on the lower half inner machine room main body 23. The lower half inner machine room main body 23 has a lower contact surface 25 and a plurality of bolt holes 24. The lower contact surface 25 is a surface that extends in the horizontal direction at both ends of the circumferential direction Dc in the lower half inner machine room main body 23, faces the upper side Dvu, and contacts the upper half inner machine room 22u. The plurality of bolt holes 24 are holes that are recessed from the lower contact surface 25 and penetrate the lower half inner machine room main body 23 in the up-down direction Dv. The plurality of bolt holes 24 are arranged in the axial direction Da. The inner machine room fastening bolts 21 are inserted into the plurality of bolt holes 24. The lower half inner chamber 22d and the upper half inner chamber 22u are fastened by the inner chamber fastening bolts 21. The plurality of inner chamber attachments 26 each have a protrusion 27 that protrudes radially outward Dro from the lower half inner chamber body 23 and protrudes further to the upper side Dvu than the lower contact surface 25. The plurality of inner chamber attachments 26 are arranged in the axial direction Da. The plurality of inner chamber attachments 26 are each fixed to the lower half inner chamber body 23 by screws 28. The inner chamber attachments 26 are sometimes referred to as keys.

[0042] The lower half outer chamber 32d has a lower half outer chamber main body 33 and a plurality of outer chamber attachments 36. The lower half outer chamber main body 33 is in a semicircular arc shape with the axis Ar as the center, and covers the outer peripheral side of the lower half inner chamber 22d. The plurality of outer chamber attachments 36 are provided on the lower half outer chamber main body 33. The lower half outer chamber main body 33 has a lower contact surface 35 and a plurality of bolt holes 34. The lower contact surface 35 is a surface extending in the horizontal direction toward the upper side Dvu and in contact with the upper half outer chamber 32u at both ends in the circumferential direction Dc of the lower half outer chamber main body 33. The plurality of bolt holes 34 are holes that are recessed from the lower contact surface 35 and penetrate the lower half outer chamber main body 33 in the up-down direction Dv. The plurality of bolt holes 34 are arranged in the axial direction Da. The outer chamber fastening bolts 31 are inserted into the plurality of bolt holes 34. The lower half outer chamber 32d and the upper half outer chamber 32u are fastened by the outer chamber fastening bolts 31. A plurality of outer chamber attachments 36 are arranged in the axial direction Da. The plurality of outer chamber attachments 36 are each fixed by screws to a portion of the radially inner side Dri of the lower contact surface 35 of the lower half outer chamber body 33. The outer chamber attachment 36 is sometimes referred to as a liner.

[0043] The outer chamber attachment 36 is located between the protruding portion 27 of the inner chamber attachment 26 and the lower contact surface 35 of the lower outer chamber body 33, and is sandwiched by the protruding portion 27 of the inner chamber attachment 26 and the lower outer chamber body 33. Therefore, by adjusting the thickness of the outer chamber attachment 36 in the up-down direction Dv, the position of the lower inner chamber 22d relative to the lower outer chamber 32d in the up-down direction Dv can be adjusted. Therefore, the inner chamber attachment 26 and the outer chamber attachment 36 play a role in adjusting the position of the lower inner chamber 22d relative to the lower outer chamber 32d in the up-down direction Dv.

[0044] The lower half inner chamber 22d is deformed over time due to its own weight or thermal influence. Figure 3 As shown, there is a deformed lower half inner chamber 22d ( Figure 3 In the case where the dimension Dv in the vertical direction (indicated by an imaginary line in FIG. 1 ) becomes longer and the dimension in the horizontal direction becomes shorter, or Figure 4 As shown, the deformed lower half inner chamber 22d ( Figure 4 In this way, if the lower half inner machine room 22d is deformed, the lower half inner machine room 22d may contact the rotor 10 during disassembly or assembly of the rotary machine.

[0045] Therefore, a method of adjusting the deformation of the lower inner chamber 22d is being studied.

[0046] "First embodiment of the method for adjusting deformation of the lower half inner chamber"

[0047] refer to Figures 5 to 9 , a first embodiment of the deformation adjustment method of the lower half inner chamber is described.

[0048] Regarding the deformation adjustment method of the lower half inner chamber in this embodiment, according to the reference Figure 5 The flowchart shown is used for explanation.

[0049] First, the deformation adjustment device 50 is prepared (preparation step S1). Figure 6 to Figure 8 As shown, the deformation adjustment device 50 includes an inner chamber side member 51 , an outer chamber side member 53 , and a distance adjustment mechanism 57 .

[0050] The inner chamber side member 51 can be mounted relative to the protruding portion 27 of the inner chamber attachment 26 in a manner that it cannot move relative to the radial direction Dr. Specifically, the inner chamber side member 51 in this embodiment is fixed by screws 52 (see FIG. 2 ). Figure 8 ) can be fixed to the protrusion 27 of the inner room attachment 26.

[0051] The outer chamber side member 53 is mounted to the lower outer chamber half 32d so as to be relatively non-movable in the radial direction Dr. The outer chamber side member 53 includes a pin 54 that can be inserted into the bolt hole 34 of the lower outer chamber half 32d.

[0052] The distance adjustment mechanism 57 can adjust the distance in the radial direction Dr between the inner chamber side member 51 mounted on the protruding portion 27 and the outer chamber side member 53 mounted on the lower half outer chamber 32d. The distance adjustment mechanism 57 includes a rod 58 formed with an external thread and a nut 59 formed with an internal thread that can be screwed into the external thread of the rod 58. A rod insertion hole 54h is formed in the pin 54, through which the rod 58 is inserted. A rod fixing hole 51h is formed in the inner chamber side member 51, through which the front end of the rod 58 can be fixed.

[0053] Next, the deformation adjustment device 50 is arranged around the protruding portion 27 of the inner chamber attachment 26 (device arrangement step S2). In the device arrangement step S2, first, a part of the pin 54 of the outer chamber side member 53 is inserted into one of the bolt holes 34 at the position closest to the protruding portion 27 among the plurality of bolt holes 34 of the lower half outer chamber 32d, and a part of the pin 54 is made to protrude from the bolt hole 34. Next, after the rod 58 of the deformation adjustment device 50 is inserted into the rod insertion hole 54h of the pin 54, the front end of the rod 58 is inserted into the rod fixing hole 51h of the inner chamber side member 51, thereby fixing the rod 58 to the inner chamber side member 51. Next, the inner chamber side member 51 of the deformation adjustment device 50 is fixed to the protruding portion 27 by the screw 52. As a result, the length direction of the rod 58 is maintained in the radial direction Dr. Then, the nut 59 of the deformation adjustment device 50 is screwed into the external thread of the rod 58. In addition, in the device arrangement step S2 , the arrangement order of the components constituting the deformation adjustment device 50 is not limited to the above order.

[0054] Assume that Figure 3 As shown, by the deformation of the lower half inner machine room 22d, the lower half inner machine room 22d ( Figure 3 When the dimension of the vertical direction Dv of the lower half inner chamber 22d is shortened, as shown by the imaginary line in FIG. Figure 6 and Figure 7 As shown in FIG. 5 , the nut 59 is screwed to the external thread of the rod 58 in such a manner that the nut 59 is located radially outwardly Dro of the pin 54. Figure 4 As shown, by the deformation of the lower half inner machine room 22d, the lower half inner machine room 22d (in Figure 3 When the dimension Dv of the lower half inner chamber 22d in the left-right direction becomes longer, the dimension Dv of the lower half inner chamber 22d in the up-down direction becomes shorter, as shown in FIG. Fig. 9As shown, the nut 59 is screwed to the external thread of the rod 58 so that the nut 59 is located on the radial inner side Dri of the pin 54. In this case, before the rod 58 is inserted into the rod insertion hole 54h of the pin 54, the nut 59 needs to be screwed to the external thread of the rod 58.

[0055] Then, the nut 59 of the deformation adjustment device 50 is operated to change the radial distance Dr between the inner chamber side member 51 and the outer chamber side member 53 (deformation adjustment step S3). Figure 6 and Figure 7 As shown in FIG. 1 , when the nut 59 is screwed to the external thread of the rod 58 so that the nut 59 is located radially outward Dro of the pin 54, the nut 59 is rotated relative to the rod 58, thereby shortening the radial distance Dr between the inner chamber side member 51 and the outer chamber side member 53. As a result, the inner chamber side member 51 is pulled toward the radially outward Dro. By operating the nut 59 as described above, as shown in FIG. Figure 3 As shown in FIG. 1 , by deformation of the lower half inner machine room 22d, when the dimension of the lower half inner machine room 22d in the vertical direction Dv becomes longer and the dimension of the lower half inner machine room 22d in the horizontal direction becomes shorter, the dimension of the lower half inner machine room 22d in the vertical direction Dv becomes shorter and the dimension of the lower half inner machine room 22d in the horizontal direction becomes longer, thereby reducing the deformation amount of the lower half inner machine room 22d. Furthermore, assuming that in the device configuration step S2, as Fig. 9 As shown in FIG. 1 , when the nut 59 is screwed to the external thread of the rod 58 so that the nut 59 is located at the radial inner side Dri of the pin 54, the nut 59 is rotated relative to the rod 58 to increase the radial distance Dr between the inner chamber side member 51 and the outer chamber side member 53. As a result, the inner chamber side member 51 is pushed to the radial inner side Dri. By the above operation of the nut 59, as shown in FIG. Figure 4 As shown, even in the case where the deformation of the lower inner chamber 22d causes the left-right dimension of the lower inner chamber 22d to become longer and the up-down dimension Dv of the lower inner chamber 22d to become shorter, the left-right dimension of the lower inner chamber 22d becomes shorter, the up-down dimension Dv of the lower inner chamber 22d becomes longer, and the deformation amount of the lower inner chamber 22d becomes less.

[0056] As described above, all the steps in the deformation adjustment method of the lower half inner casing 22d are completed.

[0057] As described above, in the present embodiment, since the deformation of the lower half inner machine case 22d can also be adjusted, it is possible to avoid the inconvenience such as the lower half inner machine case 22d contacting the rotor 10 during the disassembly or assembly of the rotary machine. Furthermore, in the present embodiment, when the deformation of the lower half inner machine case 22d is adjusted using the deformation adjusting device 50, since the deformation adjusting device 50 does not exist on the lower contact surface 25 of the lower half inner machine case 22d, it is possible to easily connect the upper half inner machine case 22u to the lower half inner machine case 22d during the deformation adjustment.

[0058] Furthermore, in the present embodiment, the distance between the inner chamber side member 51 and the outer chamber side member 53 can be shortened or expanded by rotating the nut 59 having the internal thread relative to the rod 58. Therefore, in the present embodiment, the deformation of the lower half inner chamber 22d can be easily fine-tuned.

[0059] In addition, the distance adjustment mechanism 57 of the present embodiment has a rod 58 and a nut 59. However, the nut 59 may be omitted. In this case, the pin 54 is used as the nut. Specifically, an internal thread that can be screwed into the external thread of the rod 58 is formed on the pin 54. Moreover, the rod 58 is installed so as to be immovable and rotatable relative to the protrusion 27 in the radial direction Dr and the axial direction Da. Then, in the deformation adjustment step S3, the rod 58 is rotated relative to the pin 54 to change the distance between the inner chamber side component 51 and the outer chamber side component 53.

[0060] "Second embodiment of the deformation adjustment method of the lower half inner chamber"

[0061] refer to Figure 10 to Figure 14 , a second embodiment of the deformation adjustment method of the lower half inner chamber is described.

[0062] Similar to the deformation adjustment method of the lower half inner chamber in the first embodiment, the deformation adjustment method of the lower half inner chamber in the present embodiment also performs the preparation step S1, the device placement step S2, and the deformation adjustment step S3.

[0063] In the deformation adjustment method of the lower half inner machine room 22d in this embodiment, as shown in FIG. Figure 10 to Figure 12 As shown, the deformation adjusting device 50x prepared in the preparation step S1 is different from the deformation adjusting device 50 in the first embodiment.

[0064] In a first embodiment, if Figure 6 As shown in FIG. 1 , there is a bolt hole 34 of the lower half outer chamber 32d on an imaginary line LV passing through the center of the axial direction Da of the protrusion 27 and extending in the radial direction Dr. The deformation adjustment device 50 in the first embodiment is a device suitable for this case. However, as Fig.10As shown, there may be no bolt hole 34 of the lower half outer chamber 32d on the imaginary line LV passing through the center of the axial direction Da of the protruding portion 27 and extending in the radial direction Dr. The deformation adjusting device 50x in this embodiment is a device suitable for such a case.

[0065] like Figure 10 to Figure 12 As shown, similar to the deformation adjustment device 50 in the first embodiment, the deformation adjustment device 50 x in this embodiment includes an inner chamber side member 51 , an outer chamber side member 53 x , and a distance adjustment mechanism 57 .

[0066] The inner chamber side member 51 in this embodiment is the same as the inner chamber side member 51 in the first embodiment. Therefore, the inner chamber side member 51 in this embodiment can be mounted so as not to be relatively movable in the radial direction Dr relative to the protrusion 27 of the inner chamber attachment 26. Specifically, the inner chamber side member 51 in this embodiment can be fixed to the protrusion 27 of the inner chamber attachment 26 with screws 52.

[0067] The distance adjustment mechanism 57 in this embodiment is the same as the distance adjustment mechanism 57 in the first embodiment. Therefore, the distance adjustment mechanism 57 in this embodiment can adjust the distance in the radial direction Dr between the inner chamber side member 51 mounted on the protruding portion 27 and the outer chamber side member 53x mounted on the lower half outer chamber 32d. The distance adjustment mechanism 57 also includes a rod 58 formed with an external thread and a nut 59 formed with an internal thread that can be screwed into the external thread of the rod 58. A rod fixing hole 51h is formed on the inner chamber side member 51 to which the front end of the rod 58 can be fixed.

[0068] The outer chamber side member 53x of this embodiment is different from the outer chamber side member 53 of the first embodiment. The outer chamber side member 53x of this embodiment can be mounted on the radially inner side Dr i or the radially outer side D ro relative to the lower half outer chamber 32d without being relatively movable. The outer chamber side member 53x includes: a first pin 55a that can be inserted into a first bolt hole 34a among the multiple bolt holes 34 of the lower half outer chamber 32d; a second pin 55b that can be inserted into a second bolt hole 34b among the multiple bolt holes 34 of the lower half outer chamber 32d; and a pin contact member 56 that can contact the first pin 55a and the second pin 55b.

[0069] The first bolt hole 34a is a bolt hole 34 arranged on one side in the axial direction Da based on a virtual line LV passing through the center of the axial direction Da of the protrusion 27 and extending in the radial direction Dr, among the multiple bolt holes 34 of the lower half outer casing 32d. The second bolt hole 34b is a bolt hole 34 arranged on the other side in the axial direction Da based on the aforementioned virtual line LV, among the multiple bolt holes 34 of the lower half outer casing 32d. The position in the radial direction Dr of the second bolt hole 34b is different from the position in the radial direction Dr of the first bolt hole 34a.

[0070] like Fig.10 and Fig.12 As shown in FIG. 1 , the pin contact member 56 includes a main body 56m capable of contacting the first pin 55a and the second pin 55b, and a friction plate 56s fixed to the main body 56m by screws. The main body 56m includes a first contact portion 56a capable of contacting the first pin 55a, a second contact portion 56b capable of contacting the second pin 55b, and a connecting portion 56c connecting the first contact portion 56a and the second contact portion 56b. The first contact portion 56a and the second contact portion 56b extend in the same direction as each other. In other words, the first contact portion 56a and the second contact portion 56b are parallel to each other. As described above, since the position of the radial direction Dr of the second bolt hole 34b is different from the position of the radial direction Dr of the first bolt hole 34a, the position of the radial direction Dr of the second pin 55b inserted into the second bolt hole 34b is different from the position of the radial direction Dr of the first pin 55a inserted into the first bolt hole 34a. Therefore, the second contact portion 56b that can contact the second pin 55b is displaced by only the radial distance Dr between the second bolt hole 34b and the first bolt hole 34a in the direction perpendicular to the direction in which the second contact portion 56b and the first contact portion 56a extend, relative to the first contact portion 56a that can contact the first pin. Furthermore, the thickness of the portion of the first contact portion 56a that contacts the first pin 55a in the direction perpendicular to the direction in which the second contact portion 56b and the first contact portion 56a extend is the same as the thickness of the portion of the second contact portion 56b that contacts the second pin 55b. The friction plate 56s is installed below the main body 56m when the main body 56m is in contact with the first pin 55a and the second pin 55b. The friction plate 56s contacts the lower contact surface 35 of the lower half outer chamber 32d and plays a role in preventing the lower contact surface 35 from being damaged. Therefore, the friction plate 56s is formed of resin or the like. On the main body 56m, as Fig.10 and Fig.11 As shown, when the main body 56m is brought into contact with the first pin 55a and the second pin 55b, a rod insertion hole 56h through which the rod 58 of the distance adjustment mechanism 57 can be inserted is formed between the first pin 55a and the second pin 55b in the axial direction Da.

[0071] In the preparation step S1 in the present embodiment, the deformation adjustment device 50x described above is prepared.

[0072] In the device placement step S2 of the present embodiment, first, a part of the first pin 55a of the outer chamber side member 53x is inserted into the first bolt hole 34a of the lower half outer chamber 32d, and a part of the first pin 55a is protruded from the first bolt hole 34a. Similarly, a part of the second pin 55b of the outer chamber side member 53x is inserted into the second bolt hole 34b of the lower half outer chamber 32d, and a part of the second pin 55b is protruded from the second bolt hole 34b. Next, after the rod 58 of the deformation adjustment device 50x is inserted into the rod insertion hole 56h of the pin contact member 56, the front end of the rod 58 is inserted into the rod fixing hole 51h of the inner chamber side member 51, and the rod 58 is fixed to the inner chamber side member 51. Next, the inner chamber side member 51 of the deformation adjustment device 50x is fixed to the protruding portion 27 by the screw 52. As a result, the length direction of the rod 58 is maintained in the radial direction Dr. Then, the nut 59 of the deformation adjustment device 50x is screwed into the external thread of the rod 58, and the pin contact member 56 is brought into contact with the first pin 55a and the second pin 55b. That is, the first contact portion 56a of the pin contact member 56 is brought into contact with the first pin 55a, and the second contact portion 56b of the pin contact member 56 is brought into contact with the second pin 55b. In the device arrangement step S2, the arrangement order of the components constituting the deformation adjustment device 50x is not limited to the above order.

[0073] Assume that Figure 3 As shown, by the deformation of the lower half inner machine room 22d, the lower half inner machine room 22d ( Figure 3 When the dimension of the vertical direction Dv of the lower half inner chamber 22d is shortened, as shown by the imaginary line in FIG. Fig.10 and Fig.11 As shown in FIG. 1 , the pin contact member 56 is arranged on the radially outer side Dro of the first pin 55a and the second pin 55b, and the pin contact member 56 contacts the surface of the radially outer side Dro of the first pin 55a and the second pin 55b. Then, the nut 59 is screwed to the external thread of the rod 58 so that the nut 59 is located on the radially outer side Dro of the pin contact member 56. Figure 4 As shown, by the deformation of the lower half inner machine room 22d, the lower half inner machine room 22d ( Figure 4 When the dimension Dv of the lower half inner chamber 22d in the left-right direction becomes longer, the dimension Dv of the lower half inner chamber 22d in the up-down direction becomes shorter, as shown in FIG. Fig.13 and Fig.14As shown in the figure, the pin contact member 56 is arranged on the radial inner side Dri of the first pin 55a and the second pin 55b, and the pin contact member 56 is brought into contact with the surface of the radial inner side Dri of the first pin 55a and the second pin 55b. Then, the nut 59 is screwed into the external thread of the rod 58 so that the nut 59 is located on the radial inner side Dri of the pin contact member 56. In this case, before the rod 58 is inserted into the rod insertion hole 56h of the pin contact member 56, the nut 59 needs to be screwed into the external thread of the rod 58.

[0074] In the deformation adjustment step S3 of the present embodiment, the nut 59 of the deformation adjustment device 50x is also operated to change the radial distance Dr between the inner chamber side member 51 and the outer chamber side member 53x. Fig.10 and Fig.11 As shown in FIG. 1 , when the nut 59 is screwed to the external thread of the rod 58 so that the nut 59 is located radially outward Dro of the pin contact member 56, the nut 59 is rotated relative to the rod 58, thereby shortening the radial distance Dr between the inner chamber side member 51 and the outer chamber side member 53x. As a result, the inner chamber side member 51 is pulled toward the radially outward Dro. By operating the nut 59 as described above, as shown in FIG. Figure 3 As shown in FIG. 1 , by deformation of the lower half inner machine room 22d, when the dimension of the lower half inner machine room 22d in the vertical direction Dv becomes longer and the dimension of the lower half inner machine room 22d in the horizontal direction becomes shorter, the dimension of the lower half inner machine room 22d in the vertical direction Dv also becomes shorter and the dimension of the lower half inner machine room 22d in the horizontal direction also becomes longer, thereby reducing the deformation amount of the lower half inner machine room 22d. Furthermore, assuming that in the device configuration step S2, as Fig.13 and Fig.14 As shown in FIG. 1 , when the nut 59 is screwed to the external thread of the rod 58 so that the nut 59 is located radially inward Dri of the pin contact member 56, the nut 59 is rotated relative to the rod 58 to increase the radial distance Dr between the inner chamber side member 51 and the outer chamber side member 53x. As a result, the inner chamber side member 51 is pushed radially inward Dri. By the above operation of the nut 59, as shown in FIG. Figure 4 As shown, through the deformation of the lower half inner machine room 22d, when the dimension of the lower half inner machine room 22d in the left-right direction becomes longer and the dimension of the lower half inner machine room 22d in the up-down direction Dv becomes shorter, the dimension of the lower half inner machine room 22d in the left-right direction also becomes shorter and the dimension of the lower half inner machine room 22d in the up-down direction Dv also becomes longer, thereby the deformation amount of the lower half inner machine room 22d becomes less.

[0075] As described above, all the steps in the deformation adjustment method of the lower half inner casing 22d are completed.

[0076] As described above, in the present embodiment, the deformation of the lower half inner machine case 22d can also be adjusted, so that when the rotary machine is disassembled or assembled, it is possible to avoid the inconvenience such as the lower half inner machine case 22d contacting the rotor 10. Furthermore, in the present embodiment, when the deformation of the lower half inner machine case 22d is adjusted using the deformation adjusting device 50x, since the deformation adjusting device 50x does not exist on the lower contact surface 25 of the lower half inner machine case 22d, the upper half inner machine case 22u can be easily connected to the lower half inner machine case 22d during deformation adjustment.

[0077] Furthermore, in the present embodiment, the distance between the inner chamber side member 51 and the outer chamber side member 53x can be shortened or expanded by rotating the nut 59 having the internal thread relative to the rod 58. Therefore, in the present embodiment, the deformation of the lower half inner chamber 22d can be easily fine-tuned.

[0078] Furthermore, since the outer chamber side component 53x of the present embodiment has a pin contact component 56 that can contact the first pin 55a and the second pin 55b, as described above, when there is no bolt hole 34 of the lower half outer chamber 32d on the imaginary line LV, and further, when the radial Dr position of the second pin 55b inserted in the second bolt hole 34b is different from the radial Dr position of the first pin 55a inserted in the first bolt hole 34a, the deformation of the lower half inner chamber 22d can be adjusted in the present embodiment.

[0079] In the present embodiment, the second contact portion 56b is displaced relative to the first contact portion 56a in a direction perpendicular to the direction in which the second contact portion 56b and the first contact portion 56a extend. Therefore, the surface of the first contact portion 56a in contact with the first pin 55a and the surface of the second contact portion 56b in contact with the second pin 55b are both extended in a direction perpendicular to the direction of movement of the rod 58 caused by the operation of the nut 59. Therefore, in the present embodiment, when the nut 59 is operated, the direction of the force received by the pin contact member 56 from the first pin 55a, the direction of the force received by the pin contact member 56 from the second pin 55b, and the direction of the force received by the pin contact member 56 from the nut 59 are all in the radial direction Dr, the operation of the nut 59 becomes easy, and the rod 58 can be easily moved.

[0080] In addition, the distance adjustment mechanism 57 of the present embodiment has a rod 58 and a nut 59. However, the nut 59 may be omitted. In this case, the pin contact member 56 is used as a nut. Specifically, an internal thread that can be screwed into the external thread of the rod 58 is formed on the pin contact member 56. Moreover, the rod 58 is mounted so as to be immovable in the radial direction Dr and the axial direction Da relative to the protrusion 27 and to be rotatable. Then, in the deformation adjustment step S3, the rod 58 is rotated relative to the pin contact member 56 to change the distance between the inner chamber side member 51 and the outer chamber side member 53x.

[0081] Furthermore, the first pin 55 a and the second pin 55 b of the present embodiment may be dedicated components of the deformation adjusting device 50 x , or may be the external housing fastening bolts 31 .

[0082] "Variation"

[0083] The deformation adjustment devices 50 and 50x in the above embodiments have the outer machine room side members 53 and 53x. However, the deformation adjustment devices 50 and 50x may not have the outer machine room side members 53 and 53x. In this case, the deformation adjustment step S3 is performed by pushing the inner machine room side member 51 mounted on the protruding portion 27 with a jack or the like, or pulling the inner machine room side member 51 with a chain pulley or the like.

[0084] In the above embodiment, the lower half inner chamber body 23 and the inner chamber attachment 26 of the rotary machine are separate components. However, the lower half inner chamber body 23 and the inner chamber attachment 26 may be integrally formed components.

[0085] The present invention is not limited to the above-described embodiments, and various additions, changes, substitutions, partial deletions, etc. are possible without departing from the conceptual idea and gist of the present invention derived from the contents specified in the claims and their equivalents.

[0086] "P.S."

[0087] The deformation adjustment method of the lower inner chamber 22d in the above-mentioned embodiment and the modified example can be understood, for example, as follows.

[0088] (1) The deformation adjustment method of the lower inner chamber in the first aspect is applicable to the following rotary machines.

[0089] The rotary machine includes a rotor 10 rotatable about an axis Ar extending in a horizontal direction, an inner machine chamber 20 covering the outer periphery of the rotor 10, and an outer machine chamber 30 covering the outer periphery of the inner machine chamber 20. The inner machine chamber 20 includes a lower half inner machine chamber 22d having a semicircular arc shape about the axis Ar and covering a portion of the rotor 10 located below the axis Ar by Dvd, and an upper half inner machine chamber 22u having a semicircular arc shape about the axis Ar and covering a portion of the rotor 10 located above the axis Ar by Dvu. The outer machine chamber 30 includes a lower half outer machine chamber 32d having a semicircular arc shape about the axis Ar and covering the outer periphery of the lower half inner machine chamber 22d, and an upper half outer machine chamber 32u having a semicircular arc shape about the axis Ar and covering the outer periphery of the upper half inner machine chamber 22u. The lower half inner casing 22d includes: a lower half inner casing body 23, which is semicircular with the axis Ar as the center and covers a portion of the rotor 10 that is closer to the lower side Dvd than the axis Ar; and an inner casing attachment 26, which is provided on the lower half inner casing body 23. The lower half inner casing body 23 has a lower contact surface 25 that expands in the horizontal direction and can contact the upper half inner casing 22u at both ends in the circumferential direction Dc relative to the axis Ar. The inner casing attachment 26 has a protrusion 27 that protrudes farther from the lower half inner casing body 23 in the radial direction outer side Dro relative to the axis Ar and protrudes farther from the lower contact surface 25 in the upper side Dvu.

[0090] In the above method for adjusting the deformation of the lower half inner machine room 22d in the rotary machine, the following steps are performed:

[0091] A preparation step S1 is to prepare a deformation adjustment device 50, 50x, wherein the deformation adjustment device 50, 50x has an inner machine room side component 51 that can be installed relative to the protrusion 27 in a radial direction Dr relative to the axis Ar so as to be non-movable; a device configuration step S2 is to install the inner machine room side component 51 on the protrusion 27, and configure the deformation adjustment device 50, 50x having the inner machine room side component 51 around the protrusion 27; and a deformation adjustment step S3 is to push the inner machine room side component 51 installed on the protrusion 27 toward the radial inner side Dri relative to the axis Ar, or to pull the inner machine room side component 51 toward the radial outer side Dro.

[0092] In this embodiment, since the deformation of the lower half inner machine case 22d can be adjusted, it is possible to avoid the inconvenience of the lower half inner machine case 22d contacting the rotor 10 during disassembly or assembly of the rotary machine. Furthermore, in this embodiment, when the deformation of the lower half inner machine case 22d is adjusted using the deformation adjusting devices 50, 50x, since the deformation adjusting devices 50, 50x are not present on the lower contact surfaces 25, 35 of the lower half inner machine case 22d, it is possible to easily connect the upper half inner machine case 22u to the lower half inner machine case 22d during deformation adjustment. (2)

[0094] Deformation adjustment method of lower half inner chamber in second embodiment In the deformation adjustment method of lower half inner chamber 22d in first embodiment, the deformation adjustment device 50, 50x prepared in the preparation step S1 has: an outer chamber side member 53, 53x which can be mounted on one end of the circumferential direction Dc of the lower half outer chamber 32d so as not to be relatively movable toward the radial outer side Dro or the radial inner side Dri relative to the lower half outer chamber 32d; and a distance adjustment mechanism 57 which can adjust the radial distance between the inner chamber side member 51 mounted on the protrusion 27 and the outer chamber side member 53, 53x mounted on the lower half outer chamber 32d. In the device configuration step S2, the outer chamber side member 53, 53x is mounted on the lower half outer chamber 32d, and the distance adjustment mechanism 57 is provided. In the deformation adjustment step S3, the distance adjustment mechanism 57 is operated to shorten the radial distance Dr between the inner chamber side member 51 and the outer chamber side members 53, 53x, or to increase the radial distance Dr between the inner chamber side member 51 and the lower half outer chamber 32d.

[0095] In this embodiment, the distance between the inner chamber side member 51 and the outer chamber side member 53, 53x can be shortened, or the distance between the inner chamber side member 51 and the lower half outer chamber 32d can be increased by operating the distance adjustment mechanism 57. Therefore, in this embodiment, the deformation of the lower half inner chamber 22d can be easily adjusted. (3)

[0097] Deformation adjustment method of lower half inner chamber in third embodiment In the deformation adjustment method of lower half inner chamber 22d in second embodiment, the lower half outer chamber 32d has at both ends of the circumferential direction Dc: a lower contact surface 35 extending in the horizontal direction and capable of contacting the upper half outer chamber 32u; and a plurality of bolt holes 34 recessed from the lower contact surface 35 for passage of fastening bolts 31 for connecting the upper half outer chamber 32u and the lower half outer chamber 32d. In the device configuration step S2, at least one bolt hole 34 among the plurality of bolt holes 34 is used to move the outer chamber side components 53, 53x toward the radially outer side Dr.o Or the radial inner side Dri is installed in the lower half outer machine room 32d so as to be unable to move relatively.

[0098] In this embodiment, the bolt holes 34 of the lower half outer chamber 32d can be used to mount the outer chamber side components 53, 53x to the lower half outer chamber 32d so that they cannot move relative to the radially outer side Dro or the radially inner side Dri. Therefore, in this embodiment, the structure for mounting the outer chamber side components 53, 53x to the lower half outer chamber 32d so that they cannot move relative to the radially outer side Dro or the radially inner side Dri can be simplified. (4)

[0100] Deformation Adjustment Method of Lower Half Inner Chamber in Fourth Mode In the deformation adjustment method of the lower half inner chamber 22d in the third mode, the outer chamber side member 53 has a pin 54 that can be inserted into one of the plurality of bolt holes 34. In the device disposing step S2, a part of the pin 54 is inserted into one of the plurality of bolt holes 34, and another part of the pin 54 is protruded from the one bolt hole 34. (5)

[0102] Deformation adjustment method of lower half inner chamber in fifth embodiment In the deformation adjustment method of lower half inner chamber 22d in the third embodiment, the outer chamber side member 53x includes: a first pin 55a and a second pin 55b, which can be inserted into any one of the plurality of bolt holes 34; and a pin contact member 56, which can contact the first pin 55a and the second pin 55b. In the device configuration step S2, a part of the first pin 55a is inserted into the first bolt hole 34a of the plurality of bolt holes 34, and another part of the first pin 55a protrudes from the first bolt hole 34a, a part of the second pin 55b is inserted into the second bolt hole 34b of the plurality of bolt holes 34, and another part of the second pin 55b protrudes from the second bolt hole 34b, and the pin contact member 56 contacts the first pin 55a and the second pin 55b. (6)

[0104] Deformation Adjustment Method of Lower Half Inner Chamber in Sixth Embodiment In the deformation adjustment method of the lower half inner chamber 22d in the fifth embodiment, the first pin 55a is the fastening bolt 31 insertable through the first bolt hole 34a. The second pin 55b is the fastening bolt 31 insertable through the second bolt hole 34b. (7)

[0106] Deformation adjustment method of lower half inner chamber in seventh aspect In the deformation adjustment method of the lower half inner chamber 22d in any one of the second aspect to the sixth aspect, the distance adjustment mechanism 57 includes: a rod 58 formed with an external thread; and a nut 59 or the outer chamber side member 53x formed with an internal thread that can be screwed into the external thread of the rod 58. In the device configuration step S2, the rod 58 is inserted into the outer chamber side member 53x, and the front end of the rod 58 is attached to the inner chamber side member 51 so that the external thread of the rod 58 is screwed into the internal thread. In the deformation adjustment step S3, the nut 59 or the outer chamber side member 53x formed with the internal thread is rotated relative to the rod 58.

[0107] In this embodiment, the radial distance Dr between the inner chamber side member 51 and the outer chamber side members 53, 53x can be shortened, or the radial distance Dr between the inner chamber side member 51 and the lower half outer chamber 32d can be expanded by rotating the nut 59 formed with an internal thread or the outer chamber side member 53x relative to the rod 58. Therefore, in this embodiment, the deformation of the lower half inner chamber 22d can be easily fine-tuned.

[0108] Industrial Applicability

[0109] According to one aspect of the present invention, even in a state where deformation of the lower half inner casing in the rotary machine is adjusted, the upper half inner casing can be easily connected to the lower half inner casing.

[0110] Explanation of symbols:

[0111] 10-rotor, 11-rotor shaft, 12-moving blade grid, 13-moving blade, 15-stationary blade grid, 16-stationary blade, 20-inner machine room, 21-inner machine room fastening bolt, 22u-upper inner machine room, 22d-lower inner machine room, 23-lower inner machine room body, 24-bolt hole, 25-lower contact surface, 26-inner machine room attachment, 27-protrusion, 28-screw, 30-outer machine room, 31-outer machine room fastening bolt, 32u-upper outer machine room, 32d-lower outer machine room, 33-lower outer machine room body, 34-bolt hole, 34a-first bolt hole, 34b-second bolt hole, 35-lower contact surface, 36-outer machine room attachment, 50, 50x-variable Shape adjustment device, 51-inner machine room side component, 51h-rod fixing hole, 52-screw, 53, 53x-outer machine room side component, 54-pin, 54h-rod insertion hole, 55a-first pin, 55b-second pin, 56-pin contact component, 56m-main body, 56a-first contact part, 56b-second contact part, 56c-connecting part, 56h-rod insertion hole, 56s-friction plate, 57-distance adjustment mechanism, 58-rod, 59-nut, Ar-axis line, Da-axial direction, Dc-circumferential direction, Dr-radial direction, Dri-radial inner side, Dro-radial outer side, Dv-upper and lower sides, Dvu-upper side, Dvd-lower side, LV-imaginary line.

Claims

1. A method for adjusting the deformation of a lower half inner machine room, which is a method for adjusting the deformation of a lower half inner machine room in a rotary machine, wherein the rotary machine comprises: A rotor capable of rotating about an axis extending in a horizontal direction; an inner machine chamber covering the outer circumference of the rotor; and an outer machine room covering the outer periphery of the inner machine room, The inner machine room comprises: a lower inner machine room, which is semicircular with the axis as the center and covers a portion of the rotor below the axis; and an upper inner machine room, which is semicircular with the axis as the center and covers a portion of the rotor above the axis. The outer machine room comprises: a lower half outer machine room, which is semicircular with the axis as the center and covers the outer peripheral side of the lower half inner machine room; and an upper half outer machine room, which is semicircular with the axis as the center and covers the outer peripheral side of the upper half inner machine room. The lower half inner machine room comprises: a lower half inner machine room main body, which is semicircular with the axis as the center and covers a portion of the rotor below the axis; and an inner machine room attachment, which is arranged on the lower half inner machine room main body. The lower half inner machine room body has lower contact surfaces extending in the horizontal direction and capable of contacting the upper half inner machine room at both ends of the circumferential direction relative to the axis. The inner chamber attachment has a protrusion, the protrusion protruding outward in the radial direction relative to the axis than the lower half inner chamber body and upward than the lower contact surface. The deformation adjustment method of the lower half inner machine room is performed as follows: a preparation step of preparing a deformation adjustment device having an inner chamber side member that can be mounted relative to the protrusion so as to be non-movable in a radial direction relative to the axis; a device placement step of mounting the inner chamber side member on the protruding portion and placing the deformation adjustment device having the inner chamber side member around the protruding portion; and The deformation adjustment step pushes the inner chamber side member mounted on the protruding portion radially inward relative to the axis, or pulls the inner chamber side member radially outward.

2. The deformation adjustment method of the lower half inner machine room according to claim 1, wherein: The deformation adjustment device prepared in the preparation step includes: an outer chamber side member that can be mounted on one end of the lower half outer chamber in the circumferential direction so as to be unable to move relatively to the radially outer side or the radially inner side with respect to the lower half outer chamber; and a distance adjustment mechanism capable of adjusting the radial distance between the inner chamber side member mounted on the protruding portion and the outer chamber side member mounted on the lower half outer chamber, In the device configuration step, the external machine room side member is mounted on the lower half external machine room, and the distance adjustment mechanism is provided. In the deformation adjustment step, the distance adjustment mechanism is operated to shorten the radial distance between the inner chamber side member and the outer chamber side member, or to increase the radial distance between the inner chamber side member and the lower half outer chamber.

3. The deformation adjustment method of the lower half inner machine room according to claim 2, wherein: The lower half outer machine room has, at both ends of the circumferential direction, a lower contact surface extending in the horizontal direction and capable of contacting the upper half outer machine room; and a plurality of bolt holes recessed from the lower contact surface for passage of fastening bolts for connecting the upper half outer machine room and the lower half outer machine room. In the device disposing step, the outer chamber side member is mounted to the lower outer chamber half by using at least one bolt hole among the plurality of bolt holes so as to be unable to move relatively toward the radially outer side or the radially inner side.

4. The deformation adjustment method of the lower half inner machine room according to claim 3, wherein: The outer chamber side member has a pin that can be inserted into one of the plurality of bolt holes. In the device disposing step, a portion of the pin is inserted into one of the plurality of bolt holes, and another portion of the pin is made to protrude from the one bolt hole.

5. The deformation adjustment method of the lower half inner machine room according to claim 3, wherein: The external chamber side member comprises: a first pin and a second pin which can be inserted into any one of the plurality of bolt holes; and a pin contact member which can contact the first pin and the second pin. In the device configuration step, a portion of the first pin is inserted into a first bolt hole among the plurality of bolt holes so that another portion of the first pin protrudes from the first bolt hole, a portion of the second pin is inserted into a second bolt hole among the plurality of bolt holes so that another portion of the second pin protrudes from the second bolt hole, and the pin contact member is brought into contact with the first pin and the second pin.

6. The deformation adjustment method of the lower half inner machine room according to claim 5, wherein: The first pin is the fastening bolt that can be inserted into the first bolt hole. The second pin is the fastening bolt that can be inserted into the second bolt hole.

7. The deformation adjustment method of the lower inner chamber according to any one of claims 2 to 6, wherein: The distance adjustment mechanism comprises: a rod formed with an external thread; and a nut or the external chamber side member formed with an internal thread capable of being screwed into the external thread of the rod. In the device configuration step, the rod is inserted into the outer chamber side member, and the front end of the rod is mounted on the inner chamber side member so that the outer thread of the rod is screwed into the inner thread. In the deformation adjustment step, the nut or the outer chamber side member formed with the internal thread is rotated relative to the rod.

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