Vehicle enclosures and axial flow rotating machinery

Abstract

To provide a casing and an axial flow rotary machine whose dimensions can be restrained from increasing while an exhaust gas flow passage is upsized.SOLUTION: A casing comprises a casing body, and a connection flange. The casing body covers an outer peripheral side of a rotor to be rotated around an axis. The connection flange is protruded to an outer peripheral side with respect to an outer peripheral part of the casing body, provided along a circumferential direction around the axis, and connected to another member in an axial direction that is an extending direction of the axis. The connection flange is cut in an upper end part or a horizontal end part.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present disclosure relates to a passenger compartment and an axial flow rotary machine.

Background Art

[0002] Patent Document 1 discloses a pressure vessel in which a thickening portion that increases the radial thickness is formed in a part of the circumferential direction in order to suppress deformation of the passenger compartment and improve the roundness.

[0003] Patent Document 2 discloses a gas turbine including an upper casing that forms an upper half of a passenger compartment wall, a lower casing that forms a lower half of the passenger compartment wall, and a plurality of fastening bolts that fasten the upper casing and the lower casing.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, for further performance improvement of the axial flow rotary machine, it is desirable to increase the size of the exhaust gas flow path. On the other hand, when the size of the exhaust gas flow path is increased, the outer dimensions of the passenger compartment are enlarged, and as a result, the transportability may decrease.

[0006] The present disclosure has been made to solve the above problems, and an object thereof is to provide a passenger compartment and an axial flow rotary machine capable of suppressing an increase in outer dimensions while increasing the size of the exhaust gas flow path.

Means for Solving the Problems

[0007] To solve the above problems, the vehicle enclosure of this disclosure comprises a vehicle enclosure body and a connecting flange. The vehicle enclosure body covers the outer circumference of a rotor that rotates about an axis. The connecting flange protrudes outward from the outer circumference of the vehicle enclosure body, is provided along the circumferential direction about the axis, and is connected to another member in the axial direction which is the direction of extension of the axis. The connecting flange has a plurality of bolt holes arranged along its peripheral end, into which bolts for connecting the connecting flange and the other member are inserted. The connecting flange is notched at the upper end or the horizontal end. The material includes a flat portion formed by this process, an arc portion located on the first side in the circumferential direction relative to the flat portion, and another arc portion located on the second side opposite to the first side in the circumferential direction relative to the flat portion. The flat portion is located radially inward with respect to a virtual circular outer shape connecting the arc portion and the other arc portion, and is formed over a distance longer than the distance between the centers of two adjacent bolt holes among the plurality of bolt holes.

[0008] To solve the above problems, the axial flow rotating machine of this disclosure comprises a casing and a rotor. The rotor rotates about an axis. The casing comprises a casing body and a connecting flange. The casing body covers the outer circumference of the rotor. The connecting flange protrudes outward from the outer circumference of the casing body, is provided along the circumferential direction about the axis, and is connected to another member in the axial direction which is the direction of extension of the axis. The connecting flange has a plurality of bolt holes arranged along its peripheral end, into which bolts for connecting the connecting flange and the other member are inserted. The connecting flange is notched at the upper end or the horizontal end. The material includes a flat portion formed by this process, an arc portion located on the first side in the circumferential direction relative to the flat portion, and another arc portion located on the second side opposite to the first side in the circumferential direction relative to the flat portion. The flat portion is located radially inward with respect to a virtual circular outer shape connecting the arc portion and the other arc portion, and is formed over a distance longer than the distance between the centers of two adjacent bolt holes among the plurality of bolt holes. [Effects of the Invention]

[0009] The vehicle cabin and axial flow rotating machine of this disclosure can provide a vehicle cabin and axial flow rotating machine that can increase the size of the exhaust gas passage while suppressing an increase in external dimensions. [Brief explanation of the drawing]

[0010] [Figure 1] This is a schematic cross-sectional view showing the entire gas turbine according to an embodiment of the present disclosure. [Figure 2] This is a side view showing a gas turbine casing according to an embodiment of the present disclosure. [Figure 3] This is a front view showing an exhaust chamber according to an embodiment of the present disclosure. [Figure 4] This is a diagram illustrating the planar portion of the exhaust chamber according to the embodiment of this disclosure. [Figure 5] This is a cross-sectional view of the exhaust chamber along the F5-F5 line shown in Figure 3. [Figure 6]It is a diagram for explaining the arrangement of bolt holes according to an embodiment of the present disclosure. [Figure 7] It is a diagram for explaining the arrangement of bolt holes according to an embodiment of the present disclosure. [Figure 8] It is a diagram for explaining a horizontal flange according to an embodiment of the present disclosure. [Figure 9] It is a side view showing an exhaust chamber according to an embodiment of the present disclosure. [Figure 10] It is a side view showing a state where an exhaust chamber and a turbine chamber according to an embodiment of the present disclosure are connected. [Figure 11] It is a front view showing an exhaust chamber according to a first modification of an embodiment of the present disclosure. [Figure 12] It is a diagram for explaining the reason for the arrangement of bolt holes according to a first modification of an embodiment of the present disclosure. [Figure 13] It is a front view showing an exhaust chamber according to a second modification of an embodiment of the present disclosure. [Figure 14] It is a front view showing an exhaust chamber according to a third modification of an embodiment of the present disclosure.

Mode for Carrying Out the Invention

[0011] Hereinafter, the passenger compartment and the axial flow rotary machine according to the embodiments of the present disclosure will be described with reference to the drawings. In the following description, the same reference numerals are given to configurations having the same or similar functions. And the overlapping description of those configurations may be omitted in some cases. In the present application, "XX or YY" is not limited to only one of XX and YY, and may include both XX and YY. This is the same when there are three or more selectable elements. XX and YY are arbitrary elements.

[0012] In the following description, the direction of extension of the axis Ar is defined as the axial direction Da, the circumferential direction centered on the axis Ar is defined as the circumferential direction Dc, and the direction perpendicular to the axis Ar is defined as the radial direction Dr. In the axial direction Da, with reference to the turbine 40 described later, the compressor 20 side is defined as the axially upstream side Dau, and the opposite side is defined as the axially downstream side Dad. In the radial direction Dr, the side approaching the axis Ar is defined as the radially inner side Dri, and the opposite side is defined as the radially outer side Dro.

[0013] <Embodiment> (Configuration of Gas Turbine) FIG. 1 is a cross-sectional view schematically showing the entirety of the gas turbine 1 of the embodiment. The gas turbine 1 is an example of an "axial flow rotary machine" or a "rotary machine for power generation". The gas turbine 1 includes an intake section 10 that takes in air A from the outside, a compressor 20 that compresses the air A taken in from the intake section 10, a combustor 30 that burns fuel F in the compressed air A by the compressor 20 to generate combustion gas G, a turbine 40 driven by the combustion gas G, and an exhaust section 50 that guides the combustion gas G that has passed through the turbine 40 to the outside.

[0014] The intake section 10 has a rotating shaft 11 and an intake casing 12 that covers the outer peripheral side of the rotating shaft 11. One end of the rotating shaft 11 is connected to a generator (not shown).

[0015] The compressor 20 has a compressor rotor 21 that rotates about the axis Ar, a compressor casing 22 that covers the outer peripheral side of the compressor rotor 21, and a plurality of stationary blade stages 23 provided on the inner peripheral side of the compressor casing 22. The compressor rotor 21 has a rotor shaft 25 and a plurality of moving blade stages 26 attached to the rotor shaft 25.

[0016] The turbine 40 has a turbine rotor 41 that rotates about the axis Ar, a turbine casing 42 that covers the outer peripheral side of the turbine rotor 41, and a plurality of stationary blade stages 43 provided on the inner peripheral side of the turbine casing 42. The turbine rotor 41 has a rotor shaft 45 and a plurality of moving blade stages 46 attached to the rotor shaft 45.​​​The exhaust section 50 includes a rotating shaft 51, an exhaust chamber 52 that covers the outer circumference of the rotating shaft 51, an exhaust chamber 53 located axially downstream Da of the exhaust chamber 52, and a bearing section 54 that supports the rotating shaft 51. The rotating shaft 51 is an example of a "rotor".

[0018] The aforementioned rotating shaft 11, compressor rotor 21, turbine rotor 41, and rotating shaft 51 are located on the same axis Ar and are connected to each other. This forms a gas turbine rotor 5 including the rotating shaft 11, compressor rotor 21, turbine rotor 41, and rotating shaft 51. On the other hand, the intake chamber 12, compressor chamber 22, turbine chamber 42, exhaust chamber 52, and exhaust chamber 53 are aligned in the axial direction Da and are connected to each other. This forms a gas turbine chamber 6 including the intake chamber 12, compressor chamber 22, turbine chamber 42, exhaust chamber 52, and exhaust chamber 53.

[0019] (Gas turbine bay) Figure 2 is a side view showing the gas turbine casing 6. For example, each of the intake casing 12, compressor casing 22, turbine casing 42, and exhaust casing 52 (hereinafter collectively referred to as "casing") is formed in an annular shape around the axis Ar and is divided into two parts, upper and lower. As a result, each casing has a lower casing 61 that includes the lower half of the casing and an upper casing 62 that includes the upper half of the casing. Each of the lower casing 61 and the upper casing 62 is semi-annular. The lower casing 61 is an example of a "first casing member". The upper casing 62 is an example of a "second casing member".

[0020] In this embodiment, a spigot structure 63 is provided at the connection point between the lower half casing 61 of the turbine casing 42 and the lower half casing 61 of the exhaust casing 52. The spigot structure 63 is a stepped structure for aligning two lower half casings 61 that are aligned (adjacent) in the axial direction Da. For example, the spigot structure 63 includes a recess provided in one of the two lower half casings 61 aligned in the axial direction Da, and a protrusion provided in the other of the two lower half casings 61 that aligns with the recess.

[0021] (Exhaust chamber) Next, the exhaust chamber 52 will be described. In this embodiment, the expansion of the external dimensions of the exhaust chamber 52 is suppressed by cutting out the vertical flanges 81 and 82 of the exhaust chamber 52 at specific locations. This will be explained in detail below.

[0022] Figure 3 is a front view showing the exhaust chamber 52. The exhaust chamber 52 includes, for example, a chamber body 70, a vertical flange 81, and a vertical flange 82 (see Figure 5).

[0023] (Vehicle compartment) The cabin body 70 is formed in an annular shape centered on the axis Ar and extends in the axial direction Da. The cabin body 70 forms the main part of the exhaust cabin 52 and covers the rotating shaft 51 (see Figure 1) from the outer circumference. The cabin body 70 has an annular outer wall portion (outer cylinder portion) 71 and a diffuser portion (inner cylinder portion) 72 located radially inward Dri of the outer wall portion 71 and forming an exhaust gas passage 72a. The inner diameter of the diffuser portion 72 increases as it proceeds, for example, axially downstream Da (see Figure 5). Bearing portions 54 (see Figure 1) and struts supporting the bearing portions 54 are arranged radially inward Dri of the cabin body 70. Note that in the drawings from Figure 3 onward, the parts arranged radially inward Dri of the cabin body 70 are not shown.

[0024] (Vertical flange) The vertical flange 81 is provided at the axial upstream end Dau of the casing body 70 (i.e., the end adjacent to the turbine casing 42). The vertical flange 81 is connected to the turbine casing 42 at axial Da. The vertical flange 81 is an example of a "connecting flange". The turbine casing 42 is an example of a "separate component".

[0025] On the other hand, the vertical flange 82 (see Figure 5) is provided at the axial downstream end Da of the vehicle compartment body 70 (i.e., the end adjacent to the exhaust chamber 53). The vertical flange 82 is connected to the exhaust chamber member 55 in the axial direction Da. The exhaust chamber member 55 is a member that forms the exhaust chamber 53. The vertical flange 82 is another example of a "connecting flange". The exhaust chamber member 55 is another example of a "separate member".

[0026] The configurations and functions of the two vertical flanges 81 and 82 described above are substantially the same. For this reason, one of the vertical flanges 81 will be described in detail below. Details of the other vertical flange 82 can be found in the description of the vertical flange 81 below by replacing "vertical flange 81" with "vertical flange 82", "axial upstream side Dau" with "axial downstream side Dad", and "turbine casing 42" with "exhaust chamber member 55".

[0027] The vertical flange 81 stands upright relative to the outer periphery of the passenger compartment body 70 (for example, the outer wall portion 71 of the passenger compartment body 70) and protrudes radially outward from the passenger compartment body 70 in Dro. The vertical flange 81 is provided along the circumferential direction Dc. The vertical flange 81 is plate-shaped along the radial direction Dr and the circumferential direction Dc. The vertical flange 81 is formed in an annular shape along the outer periphery of the passenger compartment body 70, except for four planar portions 85 which will be described later.

[0028] (The flat surface of the vertical flange) Next, we will describe the four flat sections 85 provided on the vertical flange 81. Figure 4 is a diagram illustrating the four planar portions 85 provided on the vertical flange 81. In this embodiment, the vertical flange 81 has four planar portions 85 (upper planar portion 85a, first side planar portion 85b, second side planar portion 85c, and lower planar portion 85d) and four arc portions 86 (first arc portion 86a, second arc portion 86b, third arc portion 86c, and fourth arc portion 86d) provided between the four planar portions 85.

[0029] The upper flat portion 85a is provided at the upper end Ea of the vertical flange 81. That is, the upper flat portion 85a is provided by cutting out the vertical flange 81 at the upper end Ea of the vertical flange 81. "The vertical flange 81 is cut out at the upper end Ea" means that, assuming a vertical flange with a hypothetical circular outer shape, there exists a region at the upper end Ea in which the outer shape of the vertical flange 81 is located radially inward Dri relative to the hypothetical circular outer shape. This definition is the same for the horizontal ends Eb, Ec and the lower end Ed. For example, the upper flat portion 85a is provided as a flat portion along the horizontal direction by cutting out the vertical flange 81 in a straight line along the horizontal direction. The upper flat portion 85a defines a part of the outer shape of the vertical flange 81 (the outer shape of the exhaust chamber 52). The upper flat portion 85a is an example of a "first flat portion".

[0030] The upper flat portion 85a is provided between the first arc portion 86a and the second arc portion 86b. When a virtual line Va having the same curvature as the first arc portion 86a is defined between the first arc portion 86a and the second arc portion 86b, the upper flat portion 85a is located radially inward Dri compared to the virtual line Va. The provision of the upper flat portion 85a reduces the vertical height of the exhaust chamber 52 by dimension S1a (hereinafter referred to as "reduction dimension S1a"). The reduction dimension S1a is the maximum vertical distance between the upper flat portion 85a and the virtual line Va. The reduction dimension S1a is larger than, for example, the vertical dimension S2a between the center of the upper flat portion 85a and the chamber body 70 (i.e., the minimum vertical dimension of the vertical flange 81).

[0031] The first side planar portion 85b is provided at the first horizontal end Eb (first side end) of the vertical flange 81. That is, the first side planar portion 85b is provided by cutting out the vertical flange 81 at the first horizontal end Eb of the vertical flange 81. In this application, "horizontal end" means the end in the horizontal direction perpendicular to the axial direction Da. For example, the first side planar portion 85b is provided as a planar portion along the vertical direction by cutting out the vertical flange 81 in a straight line along the vertical direction. The first side planar portion 85b defines a part of the outer shape of the vertical flange 81 (outer shape of the exhaust chamber 52). The first side planar portion 85b is an example of a "second planar portion".

[0032] The first side planar portion 85b is provided between the first circular arc portion 86a and the third circular arc portion 86c. The first side planar portion 85b is located radially inward Dri compared to a virtual line Vb having the same curvature as the first circular arc portion 86a, when such virtual line Vb is defined between the first circular arc portion 86a and the third circular arc portion 86c. The provision of the first side planar portion 85b reduces the horizontal width of the exhaust chamber 52 by a dimension S1b (hereinafter referred to as "reduction dimension S1b"). The reduction dimension S1b is the maximum horizontal distance between the first side planar portion 85b and the virtual line Vb. The reduction dimension S1b is larger than, for example, the horizontal dimension S2b between the center of the first side planar portion 85b and the chamber body 70 (i.e., the minimum horizontal dimension of the vertical flange 81).

[0033] The second side planar portion 85c is provided at the second horizontal end Ec (second side end) of the vertical flange 81. That is, the second side planar portion 85c is provided by cutting out the vertical flange 81 at the second horizontal end Ec of the vertical flange 81. The second horizontal end Ec is the end located on the opposite side from the first horizontal end Eb with respect to the vehicle compartment body 70. For example, the second side planar portion 85c is provided as a planar portion along the vertical direction by cutting out the vertical flange 81 in a straight line along the vertical direction. The second side planar portion 85c defines a part of the outer shape of the vertical flange 81 (the outer shape of the exhaust vehicle compartment 52).

[0034] The second side planar portion 85c is provided between the second arc portion 86b and the fourth arc portion 86d. When a virtual line Vc having the same curvature as the second arc portion 86b is defined between the second arc portion 86b and the fourth arc portion 86d, the second side planar portion 85c is located radially inward Dri compared to the virtual line Vc. The provision of the second side planar portion 85c reduces the horizontal width of the exhaust chamber 52 by dimension S1c (hereinafter referred to as "reduction dimension S1c"). The reduction dimension S1c is the maximum horizontal distance between the second side planar portion 85c and the virtual line Vc. The reduction dimension S1c is larger than, for example, the horizontal dimension S2c between the center of the second side planar portion 85c and the chamber body 70 (i.e., the minimum horizontal dimension of the vertical flange 81).

[0035] The lower flat portion 85d is provided at the lower end Ed of the vertical flange 81. That is, the lower flat portion 85d is provided by cutting out the vertical flange 81 at the lower end Ed of the vertical flange 81. For example, the lower flat portion 85d is provided as a flat portion along the horizontal direction by cutting out the vertical flange 81 in a straight line along the horizontal direction. The lower flat portion 85d defines a part of the outer shape of the vertical flange 81 (the outer shape of the exhaust chamber 52).

[0036] The lower flat section 85d is provided between the third arc section 86c and the fourth arc section 86d. When a virtual line Vd having the same curvature as the third arc section 86c is defined between the third arc section 86c and the fourth arc section 86d, the lower flat section 85d is located radially inward Dri compared to the virtual line Vd. The provision of the lower flat section 85d reduces the vertical height of the exhaust chamber 52 by a dimension S1d (hereinafter referred to as "reduction dimension S1d"). The reduction dimension S1d is the maximum vertical distance between the lower flat section 85d and the virtual line Vd. The reduction dimension S1d is larger than, for example, the vertical dimension S2d between the central part of the upper flat section 85a and the chamber body 70 (i.e., the minimum vertical dimension of the vertical flange 81).

[0037] Here, depending on the country or region, there may be restrictions on the external dimensions that can be transported by a specific means of transport (e.g., rail). The line shown as a thick dashed line in Figure 4 shows an example of the maximum external dimensions that can be transported by rail (hereinafter referred to as "transportation restriction external dimensions LD"). In this embodiment, the height of the exhaust chamber 52 is kept inside the transport restriction external dimensions LD by cutting out the upper end Ea of the vertical flange 81. Similarly, the width of the exhaust chamber 52 is kept inside the transport restriction external dimensions LD by cutting out the first horizontal end Eb and the second horizontal end Ec of the vertical flange 81.

[0038] Each of the four arc sections 86 (first arc section 86a, second arc section 86b, third arc section 86c, and fourth arc section 86d) defines a part of the outer shape of the vertical flange 81 (outer shape of the exhaust chamber 52). The first arc section 86a is provided between the upper flat section 85a and the first side flat section 85b, connecting the upper flat section 85a and the first side flat section 85b. The second arc section 86b is provided between the upper flat section 85a and the second side flat section 85c, connecting the upper flat section 85a and the second side flat section 85c. The third arc section 86c is provided between the first side flat section 85b and the lower flat section 85d, connecting the first side flat section 85b and the lower flat section 85d. The fourth arc portion 86d is provided between the second side planar portion 85c and the lower planar portion 85d, connecting the two. The four arc portions 86 have the same curvature to each other.

[0039] (Bolt holes in vertical flanges) Next, we will describe the bolt holes 91 provided in the vertical flange 81. The vertical flange 81 is provided with a plurality of bolt holes 91. The bolt holes 91 open in the axial direction Da. A bolt 92 is inserted into each bolt hole 91 along the axial direction Da. In this application, "bolt hole" broadly means a hole into which a bolt is inserted, and may be a hole with threads that engage with the bolt, or a hole without threads.

[0040] Figure 5 is a cross-sectional view of the exhaust casing 52 shown in Figure 3 along the line F5-F5. The axial downstream end Da of the turbine casing 42 has a vertical flange 101 facing the vertical flange 81 of the exhaust casing 52. The vertical flange 101 of the turbine casing 42 has a plurality of bolt holes 102. The plurality of bolt holes 91 of the vertical flange 81 of the exhaust casing 52 and the plurality of bolt holes 102 of the vertical flange 101 of the turbine casing 42 face each other in the axial direction Da. The vertical flange 81 of the exhaust casing 52 and the vertical flange 101 of the turbine casing 42 are joined to each other by bolts 92 passed through the bolt holes 91 of the vertical flange 81 of the exhaust casing 52 and the bolt holes 102 of the vertical flange 101 of the turbine casing 42.

[0041] Similarly, the axial upstream end Dau of the exhaust chamber member 55 has a vertical flange 105 facing the vertical flange 82 of the exhaust chamber 52. The vertical flange 105 of the exhaust chamber member 55 has a plurality of bolt holes 106. The plurality of bolt holes 91 of the vertical flange 82 of the exhaust chamber 52 and the plurality of bolt holes 106 of the vertical flange 105 of the exhaust chamber member 55 face each other in the axial direction Da. The vertical flange 82 of the exhaust chamber 52 and the vertical flange 105 of the exhaust chamber member 55 are joined to each other by bolts 92 passed through the bolt holes 91 of the vertical flange 82 of the exhaust chamber 52 and the bolt holes 106 of the vertical flange 105 of the exhaust chamber member 55.

[0042] (Arrangement of bolt holes in vertical flange) Next, we will return to Figure 4 and explain the arrangement of the bolt holes 91 provided in the vertical flange 81. The multiple bolt holes 91 include multiple bolt holes 91A and multiple bolt holes 91B. The multiple bolt holes 91A are arranged in the circumferential direction Dc along the outer circumference of the vertical flange 81. The multiple bolt holes 91A are divided and arranged in four arc sections 86.

[0043] On the other hand, the multiple bolt holes 91B are arranged vertically along the first side planar portion 85b or the second side planar portion 85c. In this embodiment, multiple (e.g., two) bolt holes 91B are arranged vertically along the first side planar portion 85b in the lower half casing 61 of the exhaust chamber 52. Another multiple (e.g., two) bolt holes 91B are arranged vertically along the first side planar portion 85b in the upper half casing 62 of the exhaust chamber 52.

[0044] Similarly, multiple (e.g., two) bolt holes 91B are arranged vertically along the second side planar portion 85c in the lower half casing 61 of the exhaust chamber 52. Another multiple (e.g., two) bolt holes 91B are arranged vertically along the second side planar portion 85c in the upper half casing 62 of the exhaust chamber 52.

[0045] From another perspective, the vertical flange 81 includes a first portion 111 and a second portion 112. The first portion 111 is the area that is outside the first horizontal flange 121 and the second horizontal flange 122 (see Figure 8), which will be described later, when viewed in the axial direction Da. On the other hand, the second portion 112 is the area that overlaps with the first horizontal flange 121 or the second horizontal flange 122 when viewed in the axial direction Da. The multiple bolt holes 91A described above are provided in the first portion 111 of the vertical flange 81. The multiple bolt holes 91B described above are provided in the second portion 112 of the vertical flange 81. Double-nut bolts 92A (see Figure 10) are inserted into the bolt holes 91A. On the other hand, stud bolts 92B (see Figure 10) are inserted into the bolt holes 91B. This will be described in more detail later.

[0046] Figure 6 is a diagram illustrating the arrangement of bolt holes 91 from one viewpoint. As shown in Figure 6, the vertical flange 81 has regions R1, R2, and R3. Region R1 is the region in the circumferential direction Dc that includes the upper end Ea. For example, region R1 is defined by line AL connecting the axis Ar to one end A of the upper planar portion 85a and line BL connecting the axis Ar to the other end B of the upper planar portion 85a. Region R2 is the region in the circumferential direction Dc that includes the first horizontal end Eb. For example, region R2 is defined by line CL connecting the axis Ar to one end C of the first side planar portion 85b and line DL connecting the axis Ar to the other end D of the first side planar portion 85b. Region R3 is located in the circumferential direction Dc between region R1 and region R2, and is the region excluding the upper end Ea and the horizontal ends Eb and Ec. Regions R1 and R2 are examples of "Region 1". Region R3 is an example of "Region 2".

[0047] In this embodiment, the arrangement density of bolt holes 91 in region R1 is smaller than the arrangement density of bolt holes 91 in region R3. Similarly, the arrangement density of bolt holes 91 in region R2 is smaller than the arrangement density of bolt holes 91 in region R3. "Arrangement density" is the value obtained by dividing the number of bolt holes 91 in each region by the angular range of each region. In other words, if the angular range of each region is the same, the number of bolt holes 91 in region R1 is less than the number of bolt holes 91 in region R3. Similarly, if the angular range of each region is the same, the number of bolt holes 91 in region R2 is less than the number of bolt holes 91 in region R3.

[0048] In this embodiment, the multiple bolt holes 91 have three or more (e.g., four) within an arbitrary first distance L1 in the arc portion 86. At the upper end portion Ea, there are no bolt holes 91 extending beyond the first distance L1. Also, in each of the first side flat portion 85b and the second side flat portion 85c, there are no bolt holes 91 extending beyond the first distance L1.

[0049] Figure 7 is a diagram illustrating the arrangement of bolt holes 91 from a different viewpoint. As shown in Figure 7, the vertical flange 81 has regions S1, S2, and S3. Region S1 is a region that has an angular range of 30 degrees centered on the vertical direction in the circumferential direction Dc and includes at least a portion of the upper end Ea. Region S2 is a region that has an angular range of 30 degrees centered on the horizontal direction in the circumferential direction Dc and includes at least a portion of the first horizontal end Eb. Region S3 is a region that has an angular range of 30 degrees centered on a 45-degree angle. Regions S1 and S2 are each another example of the "first region". Region S3 is another example of the "second region".

[0050] In this embodiment, the total cross-sectional area of ​​the bolt holes 91 in region S1 is less than the total cross-sectional area of ​​the bolt holes 91 in region S3. Similarly, the total cross-sectional area of ​​the bolt holes 91 in region S2 is less than the total cross-sectional area of ​​the bolt holes 91 in region S3. "Total cross-sectional area of ​​bolt holes" refers to the sum of the cross-sectional areas of the multiple bolt holes 91 arranged in each region.

[0051] (Horizontal flange) Next, the first horizontal flange 121 and the second horizontal flange 122 will be described. Figure 8 is a diagram illustrating the first horizontal flange 121 and the second horizontal flange 122, and is a perspective view of the vertical flange 81.

[0052] The lower half casing 61 of the exhaust chamber 52 has a first horizontal flange 121 that extends horizontally from the outer periphery of the chamber body 70. The first horizontal flange 121 is provided at one end (first side end) of the lower half casing 61 in the circumferential direction Dc and at the other end (second side end) of the lower half casing 61 in the circumferential direction Dc. The first horizontal flange 121 is an example of a "side flange of the first chamber member".

[0053] The first horizontal flange 121 is provided horizontally between the vehicle compartment body 70 and the external dimensions LD of the transport restriction mentioned above. The first horizontal flange 121 has a relatively large length vertically downward from the boundary between the lower casing 61 and the upper casing 62 in order to secure an area for the nut 127a, which will be described later, to be placed between the vehicle compartment body 70 and the external dimensions LD of the transport restriction.

[0054] The first horizontal flange 121 has a plurality of bolt holes 125. The plurality of bolt holes 125 are arranged parallel to the axial direction Da (see Figure 9). Each bolt hole 125 penetrates the first horizontal flange 121 in the vertical direction.

[0055] The first horizontal flange 121 has a first flange side planar portion 121a. The first flange side planar portion 121a is an end face oriented in a direction perpendicular to the axial direction Da. The first flange side planar portion 121a is provided along the external dimension LD of the transport restriction. The first flange side planar portion 121a is a planar portion oriented in the vertical direction. The first flange side planar portion 121a is an example of a "third planar portion".

[0056] On the other hand, the upper half casing 62 of the exhaust chamber 52 has a second horizontal flange 122 that extends horizontally from the outer periphery of the chamber body 70. The second horizontal flange 122 is provided at one end (first side end) of the upper half casing 62 in the circumferential direction Dc and at the other end (second side end) of the upper half casing 62 in the circumferential direction Dc. The second horizontal flange 122 faces the first horizontal flange 121 in the vertical direction. The second horizontal flange 122 is an example of a "side flange of the second chamber member".

[0057] The second horizontal flange 122 is provided horizontally between the vehicle compartment body 70 and the external dimensions LD of the transport restriction mentioned above. The second horizontal flange 122 has a relatively large length vertically above the boundary between the lower casing 61 and the upper casing 62 in order to secure an area for the nut 127b, which will be described later, to be placed between the vehicle compartment body 70 and the external dimensions LD of the transport restriction.

[0058] The second horizontal flange 122 has a plurality of bolt holes 126. The plurality of bolt holes 126 are arranged parallel to the axial direction Da (see Figure 9). Each bolt hole 126 penetrates the second horizontal flange 122 vertically. The plurality of bolt holes 125 of the first horizontal flange 121 and the plurality of bolt holes 126 of the second horizontal flange 122 face each other vertically. The first horizontal flange 121 and the second horizontal flange 122 are joined to each other by bolts 127 that pass through the bolt holes 125 of the first horizontal flange 121 and the bolt holes 126 of the second horizontal flange 122. The bolts 127 are, for example, double-nut bolts including nuts 127a and 127b.

[0059] The second horizontal flange 122 has a second flange side planar portion 122a. The second flange side planar portion 122a is an end face oriented in a direction perpendicular to the axial direction Da. The second flange side planar portion 122a is provided along the external dimension LD of the transport restriction. The second flange side planar portion 122a is a planar portion oriented in the vertical direction. The second flange side planar portion 122a is located on the same plane as the first flange side planar portion 121a. The second flange side planar portion 122a is an example of a "fourth planar portion".

[0060] Figure 9 is a side view showing the exhaust chamber 52. In this embodiment, the first side planar portion 85b of the vertical flange 81 is connected to the first flange side planar portion 121a and the second flange side planar portion 122a in the axial direction Da. For example, the first side planar portion 85b, the first flange side planar portion 121a, and the second flange side planar portion 122a of the vertical flange 81 are located on the same plane.

[0061] Similarly, the first side planar portion 85b of the vertical flange 82 is connected to the first flange side planar portion 121a and the second flange side planar portion 122a in the axial direction Da. For example, the first side planar portion 85b, the first flange side planar portion 121a, and the second flange side planar portion 122a of the vertical flange 82 are located on the same plane.

[0062] As a result, one large flat surface S is formed, which includes the first flat surface 85b of the vertical flange 81, the first flat surface 121a of the vertical flange, the second flat surface 122a of the vertical flange, and the first flat surface 85b of the vertical flange 82. The same applies to the second flat surface 85c of the vertical flange 81 and the second flat surface 85c of the vertical flange 82.

[0063] (Type of bolt) Figure 10 is a side view showing the exhaust chamber 52 and the turbine chamber 42 connected. The multiple bolt holes 91A (bolt holes 91 provided in the arc portion 86 of the vertical flange 81) are through holes that penetrate the vertical flange 81 in the axial direction Da. Double-nut bolts 92A are passed through the bolt holes 91A as bolts 92.

[0064] On the other hand, the bolt holes 91B (bolt holes 91 aligned along the first side planar portion 85b or the second side planar portion 85c) extend toward the first horizontal flange 121 or the second horizontal flange 122. The tip of the bolt hole 91B may reach the interior of the first horizontal flange 121 or the second horizontal flange 122. The bolt hole 91B is a bottomed hole with threads on its inner surface. A stud bolt 92B is inserted into the bolt hole 91B as a bolt 92.

[0065] (Opening on the flat side of the flange) Each of the first flange side flat portion 121a and the second flange side flat portion 122a has an opening 131. The opening 131 communicates with the interior of the exhaust chamber 52. The opening 131 is, for example, a work opening for accessing the interior of the exhaust chamber 52. For example, a worker can perform work inside the exhaust chamber 52 (such as bolting the diffuser portion 72) through the opening 131. The opening 131 is closed by a cover 132.

[0066] However, the opening 131 may also serve as an air supply opening to the inside of the exhaust chamber 52, either in place of or in conjunction with the working opening. For example, the exhaust gas temperature of a gas turbine may become high under certain operating conditions (e.g., partial load operation). In such cases, an air supply device can be attached to the opening 131 to supply outside air to the inside of the exhaust chamber 52, thereby promoting the cooling of the exhaust chamber 52. Note that the opening 131 may also serve purposes other than those described above.

[0067] (Auxiliary plate unit) In this embodiment, the gas turbine 1 has three auxiliary plate units 140. The auxiliary plate units 140 are reinforcing members that reinforce the connection structure between the turbine casing 42 and the exhaust casing 52. One auxiliary plate unit 140 is provided spanning the upper flat portion 85a of the exhaust casing 52 and the upper flat portion 85a of the turbine casing 42. Another auxiliary plate unit 140 is provided spanning the first side flat portion 85b of the exhaust casing 52 and the first side flat portion 85b of the turbine casing 42. Another auxiliary plate unit 140 is provided spanning the second side flat portion 85c of the exhaust casing 52 and the second side flat portion 85c of the turbine casing 42.

[0068] Each auxiliary plate unit 140 has an auxiliary plate 141, a plurality of first bolts 142, and a plurality of second bolts 143. The auxiliary plate 141 is a plate member parallel to the upper flat portion 85a, the first side flat portion 85b, or the second side flat portion 85c. The auxiliary plate 141 covers the boundary between the exhaust chamber 52 and the turbine chamber 42. In addition, the auxiliary plate 141 positioned on the first side flat portion 85b or the second side flat portion 85c covers the boundary between the lower half casing 61 and the upper half casing 62, in addition to the boundary between the exhaust chamber 52 and the turbine chamber 42.

[0069] The auxiliary plate 141 has a plurality of bolt holes facing the exhaust chamber 52 and a plurality of bolt holes facing the turbine chamber 42. The exhaust chamber 52 has a plurality of bolt holes 147 facing the plurality of bolt holes of the auxiliary plate 141. The turbine chamber 42 has a plurality of bolt holes 148 facing the plurality of bolt holes of the auxiliary plate 141. The first bolt 142 is inserted into the bolt hole of the auxiliary plate 141 and engages with the bolt hole 147 of the exhaust chamber 52. The second bolt 143 is inserted into the bolt hole of the auxiliary plate 141 and engages with the bolt hole 148 of the turbine chamber 42. In this way, the auxiliary plate 141 is fixed to the exhaust chamber 52 and the turbine chamber 42.

[0070] (Orthodontic plate unit) In this embodiment, the gas turbine 1 has a straightening plate unit 150. The straightening plate unit 150 is an assembly jig that corrects deformation of the exhaust chamber 52 or the turbine chamber 42 during the connection work between the exhaust chamber 52 and the turbine chamber 42.

[0071] The straightening plate unit 150 is provided spanning the lower flat portion 85d of the exhaust chamber 52 and the lower flat portion 85d of the turbine chamber 42. The straightening plate unit 150 has a straightening plate 151, a plurality of first bolts 152, and a plurality of second bolts 153. The straightening plate 151 is a plate member parallel to the lower flat portion 85d. The straightening plate 151 is thicker and more rigid than the auxiliary plate 141. The straightening plate 151 covers the boundary between the exhaust chamber 52 and the turbine chamber 42.

[0072] The straightening plate 151 has a plurality of bolt holes facing the exhaust chamber 52 and a plurality of bolt holes facing the turbine chamber 42. The exhaust chamber 52 has a plurality of bolt holes 157 facing the plurality of bolt holes of the auxiliary plate 141. The turbine chamber 42 has a plurality of bolt holes 158 facing the plurality of bolt holes of the auxiliary plate 141. The first bolt 152 is inserted into the bolt hole of the auxiliary plate 141 and engages with the bolt hole 157 of the exhaust chamber 52. The second bolt 153 is inserted into the bolt hole of the auxiliary plate 141 and engages with the bolt hole 158 of the turbine chamber 42. In this way, the straightening plate 151 is fixed to the exhaust chamber 52 and the turbine chamber 42.

[0073] The connection between the exhaust casing 52 and the turbine casing 42 is performed, for example, by lowering the lower half casing 61 of the exhaust casing 52 from a suspended position relative to the lower half casing 61 of the turbine casing 42, which has been installed earlier. At this time, if the lower half casing 61 of the exhaust casing 52 and / or the lower half casing 61 of the turbine casing 42 is deformed, the convex and concave parts in the spigot structure 63 between the exhaust casing 52 and the turbine casing 42 may not align, and the lower half casing 61 of the exhaust casing 52 may not be able to be lowered to the correct position. In this case, by tightening the second bolt 153 of the straightening plate unit 150, the deformation of the lower half casing 61 of the exhaust casing 52 is corrected, and the lower half casing 61 of the exhaust casing 52 is lowered to the correct position. This allows the connection between the exhaust casing 52 and the turbine casing 42 to be performed smoothly.

[0074] Furthermore, the reason for providing the lower flat portion 85d in the exhaust chamber 52 is not the installation of the straightening plate unit 150, but rather, similar to the upper flat portion 85a, to reduce the external dimensions of the exhaust chamber 52.

[0075] (Effects and Benefits) To further improve the performance of the gas turbine 1, it is desirable to enlarge the exhaust gas passage 72a. However, enlarging the exhaust gas passage 72a may increase the external dimensions of the exhaust casing 52, which may result in a decrease in transportability. For example, if the external dimensions of the exhaust casing 52 exceed the external dimensions LD of the railway transport restrictions, the transportability of the exhaust casing 52 will decrease.

[0076] Therefore, in this embodiment, the vertical flanges 81 and 82 provided on the outer periphery of the chamber body 70 of the exhaust chamber 52 are cut out at the upper end Ea or the horizontal ends Eb and Ec. With this configuration, even when the exhaust gas passage 72a is enlarged, the expansion of the external dimensions can be suppressed by cutting out specific parts of the vertical flanges 81 and 82 that define the external dimensions of the exhaust chamber 52. For example, by cutting out specific parts of the vertical flanges 81 and 82, the external dimensions of the exhaust chamber 52 can be kept within the external dimensions LD of the railway transport restrictions, and a decrease in the transportability of the exhaust chamber 52 can be avoided.

[0077] (modified version) The following describes some variations. Note that, in each variation, the configuration is the same as in the embodiment described above, except for the details described below.

[0078] (First variation) Figure 11 is a front view showing the exhaust chamber 52 according to a first modified example of the embodiment. In this modified example, the bolt holes 91B (bolt holes 91 aligned along the first side planar portion 85b or the second side planar portion 85c) provided in the vertical flange 81 are not provided in the upper half casing 62, but are provided only in the lower half casing 61.

[0079] Figure 12 is a diagram illustrating the reason for the arrangement of the bolt holes 91B described above. During the assembly of the gas turbine 1, first, the lower half casing 61 of the intake casing 12, the lower half casing 61 of the compressor casing 22, the lower half casing 61 of the turbine casing 42, and the lower half casing 61 of the exhaust casing 52 are aligned in the axial direction Da and connected to each other. This forms the lower half 6a of the gas turbine casing 6. After the lower half 6a of the gas turbine casing 6 is formed, the turbine rotor 41 is positioned inside the lower half 6a of the gas turbine casing 6. Subsequently, the corresponding upper half casing 62, etc., is attached to the lower half casing 61 of each casing.

[0080] Here, the gas turbine 1 has a support portion 160 that supports the gas turbine 1 with respect to the mounting surface M. The support portion 160 is not provided in the exhaust casing 52, but is provided in the turbine casing 42. In this case, when the upper half casing 62 of the exhaust casing 52 is attached to the lower half 6a of the gas turbine casing 6, the exhaust casing 52 overhangs the lower half casing 61 of the turbine casing 42, and a relatively large rotational moment FM acts on the lower half casing 61 of the gas turbine casing 6. For this reason, even if the completed gas turbine casing 6 can be sufficiently joined with only bolts 92A, the joining force between the lower half casing 61 of the turbine casing 42 and the lower half casing 61 of the exhaust casing 52 may be insufficient during assembly.

[0081] On the other hand, according to the modified configuration described above, the upper part of the lower half casing 61 of the turbine casing 42 and the upper part of the lower half casing 61 of the exhaust casing 52 are joined by stud bolts 92B inserted into bolt holes 91B, thereby providing sufficient bonding force against the rotational moment FM due to the overhang. This suppresses deformation during the assembly of the gas turbine 1 and improves the workability of the gas turbine 1 during assembly.

[0082] (Second variation) Figure 13 is a front view showing an exhaust chamber 52 according to a second modification of the embodiment. The vertical flange 81 of this modification has a region R1, a region R2, and a region R3, similar to the first embodiment. Regions R1 and R2 are examples of a "first region". Region R3 is an example of a "second region". In this modification, the plurality of bolt holes 91 include at least one first bolt hole 91m located in region R1 or region R2 and a plurality of second bolt holes 91n located in region R3. The diameter of the first bolt hole 91m is smaller than the diameter of the second bolt holes 91n.

[0083] With this configuration, bolt holes 91 can be provided even in areas where the installation space for bolt holes 91 is limited (areas where the width of the vertical flange 81 is narrow) due to the provision of the upper flat portion 85a, the first side flat portion 85b, or the second side flat portion 85c. This improves the coupling between the exhaust casing 52 and other components (turbine casing 42 or exhaust casing member 55).

[0084] (Third variation) Figure 14 is a front view showing an exhaust chamber 52 according to a third modified example of the embodiment. In this modified example, the vertical flange 81 does not have a flat portion 85 at the upper end Ea, the first horizontal end Eb, or the second horizontal end Ec. The vertical flange 81 has an arc portion 161 along the outer wall portion 71 of the chamber body 70 at the upper end Ea, the first horizontal end Eb, or the second horizontal end Ec. The radius of curvature Ra of the arc portion 161 is smaller than the radius of curvature Rb of the arc portion 86. Even with this configuration, the external dimensions of the exhaust chamber 52 can be suppressed.

[0085] Embodiments and several modifications have been described above. However, embodiments and modifications are not limited to the examples described above. For example, the exhaust chamber 52 may not be divided into a lower casing 61 and an upper casing 62, but may have an annular configuration (full ring configuration). In this case, since the first horizontal flange 121 and the second horizontal flange 122 are absent, the bolt holes 91B may be through holes rather than bottomed holes, and the bolts 92 attached to the bolt holes 91B may be stud bolts 92B or double-nut bolts 92A.

[0086] <Note> The vehicle cabin and axial flow rotating machine described in the embodiment can be understood, for example, as follows:

[0087] (1) The casing according to the first embodiment (for example, the exhaust casing 52) comprises a casing body 70 that covers the outer circumference of a rotor (for example, a rotating shaft 51) that rotates about an axis Ar, and a connecting flange (for example, a vertical flange 81 or a vertical flange 82) that protrudes outward from the outer circumference of the casing body 70, is provided along the circumferential direction Dc about the axis Ar, and is connected to another member (for example, a turbine casing 42 or an exhaust casing member 55) in the axial direction Da which is the direction of extension of the axis Ar, wherein the connecting flange is cut out at the upper end Ea or the horizontal ends Eb,Ec.

[0088] With this configuration, even if the exhaust gas passage 72a is enlarged, the expansion of the external dimensions of the exhaust chamber 52 can be suppressed by cutting out a specific part of the connecting flange that defines the external dimensions of the exhaust chamber 52.

[0089] (2) The passenger compartment according to the second embodiment is the passenger compartment of (1), wherein the connecting flange is cut out at both the upper end Ea and the horizontal ends Eb and Ec.

[0090] This configuration further suppresses the expansion of the vehicle's exterior dimensions.

[0091] (3) The passenger compartment according to the third embodiment is the passenger compartment of (1) or (2), wherein the connecting flange is cut out at the upper end Ea and has a first planar portion (e.g., upper planar portion 85a) that is horizontally aligned with the upper end Ea.

[0092] With this configuration, the upper end Ea is cut out, which suppresses the expansion of the external dimensions in the height direction. Furthermore, because the upper end Ea has a flat surface, the external shape can be simplified and the external dimensions of the vehicle interior in the height direction can be made smaller compared to when the upper end Ea has a different shape.

[0093] (4) The passenger compartment according to the fourth embodiment is one of the passenger compartments from (1) to (3), wherein the connecting flange is cut out at the horizontal ends Eb,Ec and has a second planar portion (for example, a first side planar portion 85b or a second side planar portion 85c) perpendicular to the horizontal ends Eb,Ec.

[0094] With this configuration, the horizontal ends Eb and Ec are cut out, which helps to suppress the expansion of the external dimensions in the width direction. Furthermore, because the horizontal ends Eb and Ec have flat surfaces, the external shape can be simplified and the external dimensions of the vehicle interior in the width direction can be made smaller compared to cases where the horizontal ends Eb and Ec have different shapes.

[0095] (5) The passenger compartment according to the fifth embodiment is the passenger compartment of (4), wherein the connecting flange has a plurality of bolt holes 91 into which bolts 92 are inserted in the axial direction Da, and two or more bolt holes 91B included in the plurality of bolt holes 91 are arranged vertically along the second planar portion.

[0096] With this configuration, multiple bolt holes 91 can be placed even in the area that becomes narrower due to the provision of the second planar section. This makes it possible to further increase the bonding force between the vehicle compartment and other components.

[0097] (6) The passenger compartment according to the sixth embodiment is the passenger compartment of (4) or (5), the passenger compartment comprising a first passenger compartment member (e.g., lower half casing 61) and a second passenger compartment member (e.g., upper half casing 62) divided vertically, the first passenger compartment member having a horizontally protruding side flange (e.g., first horizontal flange 121), the second passenger compartment member having a horizontally protruding side flange (e.g., second horizontal flange 122) connected vertically to the side flange of the first passenger compartment member, the side flange of the first passenger compartment member having a third planar portion (e.g., first flange side planar portion 121a) along the vertical direction, the side flange of the second passenger compartment member having a fourth planar portion (e.g., second flange side planar portion 122a) along the vertical direction, and the second planar portion being connected to the third and fourth planar portions.

[0098] With this configuration, the side flanges of the first and second passenger compartment members do not protrude relative to the connecting flange. Therefore, the external dimensions of the passenger compartment in the lateral direction can be reduced.

[0099] (7) The passenger compartment according to the seventh embodiment is the passenger compartment according to (6), wherein the connecting flange includes, when viewed in the axial direction Da, a first portion 111 that is detached from the side flange of the first passenger compartment member and the side flange of the second passenger compartment member, and a second portion 112 that overlaps with the side flange of the first passenger compartment member or the side flange of the second passenger compartment member, the first portion 111 having bolt holes 91A through which both nut bolts 92A are passed, and the second portion 112 having bolt holes 91B into which stud bolts 92B are inserted.

[0100] With this configuration, bolt holes 91 can be provided in the connecting flange by utilizing the region that overlaps with the side flange of the first passenger compartment member or the side flange of the second passenger compartment member when viewed in the axial direction Da. This makes it possible to further increase the bonding force between the passenger compartment and the other member.

[0101] (8) The passenger compartment according to the eighth embodiment is the passenger compartment of (6) or (7), wherein the third or fourth planar section has an opening 131 that communicates with the interior of the passenger compartment.

[0102] With this configuration, work related to the passenger compartment and cooling of the passenger compartment can be performed through openings provided in the side flange of the first passenger compartment member or the side flange of the second passenger compartment member.

[0103] (9) The passenger compartment according to the ninth embodiment is one of the passenger compartments from (4) to (8), and the second planar portion has bolt holes 146 to which an auxiliary plate 141 extending from the passenger compartment to a separate member is fixed.

[0104] With this configuration, an auxiliary plate 141 can be attached to the passenger compartment and the separate component. Attaching the auxiliary plate 141 reinforces the connection between the passenger compartment and the separate component and / or closes at least a portion of any gaps that may occur at the boundary between the passenger compartment and the separate component.

[0105] (10) The passenger compartment according to the tenth embodiment is any one of (1) to (9), wherein the connecting flange has a plurality of bolt holes 91 into which bolts 92 are inserted in the axial direction Da, and the connecting flange includes a first region (e.g., region R1 or region R2) in the circumferential direction Dc that includes an upper end Ea or horizontal ends Eb,Ec, and a second region (e.g., region R3) that excludes the upper end Ea and horizontal ends Eb,Ec, and the arrangement density of bolt holes 91 in the first region is smaller than the arrangement density of bolt holes 91 in the second region.

[0106] With this configuration, there are fewer bolt holes 91 near the upper end Ea or the horizontal ends Eb,Ec, and the vertical flange 81 can be cut out more extensively. This allows for a smaller overall dimensions of the passenger compartment.

[0107] (11) The vehicle compartment according to the 11th embodiment is any one of (1) to (10), wherein the connecting flange has a plurality of bolt holes 91 into which bolts 92 are inserted in the axial direction Da, the connecting flange includes a first region (e.g., region R1 or region R2) including an upper end Ea or horizontal ends Eb,Ec in the circumferential direction Dc and a second region (e.g., region R3) excluding the upper end Ea and horizontal ends Eb,Ec, the plurality of bolt holes 91 include at least one first bolt hole 91m located in the first region and a plurality of second bolt holes 91n located in the second region, the diameter of the first bolt hole 91m is smaller than the diameter of the second bolt holes 91n.

[0108] With this configuration, the bolt holes 91 are smaller near the upper end Ea or the horizontal ends Eb,Ec, allowing for a larger cutout in the vertical flange 81. This makes it possible to reduce the external dimensions of the passenger compartment.

[0109] (12) The passenger compartment according to the 12th embodiment is one of the passenger compartments from (1) to (11), wherein the connecting flange has a plurality of bolt holes 91 into which bolts 92 are inserted in the axial direction Da, and the plurality of bolt holes 91 have three or more bolt holes within a first distance L1, and at the upper end Ea, there are no bolt holes 91 extending beyond the first distance.

[0110] With this configuration, there are fewer bolt holes 91 near the upper end Ea, and the vertical flange 81 can be cut out more extensively. This allows for a smaller overall dimensions of the passenger compartment.

[0111] (13) The passenger compartment according to the 13th embodiment is any one of (1) to (12), wherein the connecting flange has a plurality of bolt holes 91 into which bolts 92 are inserted in the axial direction Da, and the connecting flange includes a first region (e.g., region S1 or region S2) in the circumferential direction Dc that has an angular range of 30 degrees centered on the vertical or horizontal direction and includes at least a part of the upper end Ea or at least a part of the horizontal end, and a second region (e.g., region S3) that has an angular range of 30 degrees centered on a diagonal 45 degrees, wherein the total cross-sectional area of ​​the bolt holes 91 in the first region is less than the total cross-sectional area of ​​the bolt holes 91 in the second region.

[0112] With this configuration, the number and / or size of bolt holes 91 near the upper end Ea or the horizontal ends Eb,Ec can be reduced, and the vertical flange 81 can be cut out more extensively. This allows for a reduction in the external dimensions of the passenger compartment.

[0113] (14) The axial flow rotating machine according to the 14th embodiment is equipped with one of the chassis from (1) to (13).

[0114] With this configuration, even if the exhaust gas passage 72a is enlarged, the expansion of the external dimensions of the passenger compartment can be suppressed by cutting out a specific part of the connecting flange that defines the external dimensions of the passenger compartment. [Explanation of Symbols]

[0115] 1…Gas turbine (axial flow rotating machine) 10... Intake section 12…Intake compartment 20... Compressor 22...Compressor compartment 40... Turbine 42... Turbine casing 50... Exhaust section 52... Exhaust chamber 53... Exhaust chamber 55... Exhaust chamber components 61... Lower casing (first passenger compartment component) 62…Upper casing (second passenger compartment component) 70... Main body of the vehicle 81…Vertical flange (connecting flange) 82…Vertical flange (connecting flange) Ea...Top end Eb...1st horizontal end Ec…Second horizontal end Ed…lower end 85a...Top plane part (first plane part) 85b...First side planar section (second planar section) 85c...Second side planar section 85d…Lower plane part 91... Bolt holes 91m…First bolt hole 91n...Second bolt hole 92... Volts 92A...Both nuts and bolts 92B... Mounting bolt 111…Part 1 112…Second part 131…Opening 140... Auxiliary plate unit 141... Auxiliary plate 142...1st bolt 143...2nd bolt 147… Bolt holes 148… Bolt holes

Claims

1. The main body of the enclosure covers the outer circumference of the rotor that rotates around its axis, A connecting flange that protrudes outward from the outer periphery of the vehicle compartment body, is provided along the circumferential direction centered on the axis, and is connected to another member in the axial direction which is the direction of extension of the axis, Equipped with, The connecting flange has a plurality of bolt holes arranged along the circumferential end of the connecting flange, into which bolts for connecting the connecting flange and the other member are inserted. The connecting flange includes a flat portion formed by cutting out at the upper end or horizontal end, an arc portion located on the first side in the circumferential direction relative to the flat portion, and another arc portion located on the second side opposite to the first side in the circumferential direction relative to the flat portion. The planar portion is located radially inward with respect to the virtual circular outer shape connecting the arc portion and the other arc portion, and is formed over a distance longer than the distance between the centers of two adjacent bolt holes among the plurality of bolt holes. Vehicle compartment.

2. The connecting flange is notched at both the upper end and the horizontal end. The vehicle compartment according to claim 1.

3. The connecting flange is notched at its upper end and has a first planar portion that runs horizontally along the upper end. A vehicle compartment according to claim 1 or claim 2.

4. The connecting flange is cut out at the horizontal end and has a second planar portion that is perpendicular to the horizontal end. A vehicle compartment according to any one of claims 1 to 3.

5. Two or more bolt holes included in the plurality of bolt holes are arranged vertically along the second planar portion. The vehicle compartment according to claim 4.

6. The aforementioned passenger compartment includes a first passenger compartment member and a second passenger compartment member, which are divided vertically. The first vehicle compartment member has a side flange that protrudes horizontally, The second passenger compartment member has a side flange that extends horizontally and is connected vertically to the side flange of the first passenger compartment member. The side flange of the first vehicle compartment member has a third planar portion that is aligned vertically, The side flange of the second vehicle compartment member has a fourth planar portion that is aligned vertically, The second planar portion is connected to the third planar portion and the fourth planar portion. The vehicle compartment according to claim 4 or claim 5.

7. A vehicle compartment, The main body of the enclosure covers the outer circumference of the rotor that rotates around its axis, A connecting flange that protrudes outward from the outer periphery of the vehicle compartment body, is provided along the circumferential direction centered on the axis, and is connected to another member in the axial direction which is the direction of extension of the axis, Equipped with, The connecting flange is cut out at the horizontal end and has a second planar portion that is perpendicular to the horizontal end. The aforementioned passenger compartment includes a first passenger compartment member and a second passenger compartment member, which are divided vertically. The first vehicle compartment member has a side flange that protrudes horizontally, The second passenger compartment member has a side flange that extends horizontally and is connected vertically to the side flange of the first passenger compartment member. The side flange of the first vehicle compartment member has a third planar portion that is aligned vertically, The side flange of the second vehicle compartment member has a fourth planar portion that is aligned vertically, The second planar portion is connected to the third planar portion and the fourth planar portion. The connecting flange, when viewed in the axial direction, includes a first portion that is detached from the side flange of the first cabin member and the side flange of the second cabin member, and a second portion that overlaps with the side flange of the first cabin member or the side flange of the second cabin member. The first part has bolt holes into which both nut bolts are inserted, The aforementioned second portion has bolt holes into which stud bolts are inserted. Vehicle compartment.

8. A vehicle compartment, The main body of the enclosure covers the outer circumference of the rotor that rotates around its axis, A connecting flange that protrudes outward from the outer periphery of the vehicle compartment body, is provided along the circumferential direction centered on the axis, and is connected to another member in the axial direction which is the direction of extension of the axis, Equipped with, The connecting flange is cut out at the horizontal end and has a second planar portion that is perpendicular to the horizontal end. The aforementioned passenger compartment includes a first passenger compartment member and a second passenger compartment member, which are divided vertically. The first vehicle compartment member has a side flange that protrudes horizontally, The second passenger compartment member has a side flange that extends horizontally and is connected vertically to the side flange of the first passenger compartment member. The side flange of the first vehicle compartment member has a third planar portion that is aligned vertically, The side flange of the second vehicle compartment member has a fourth planar portion that is aligned vertically, The second planar portion is connected to the third planar portion and the fourth planar portion. The third or fourth planar portion has an opening that communicates with the interior of the vehicle compartment. Vehicle compartment.

9. The second planar portion has bolt holes to which an auxiliary plate extending between the vehicle compartment and the separate member is fixed. A vehicle compartment according to any one of claims 4 to 8.

10. A vehicle housing body that covers the outer circumference of a rotor that rotates about an axis, A connecting flange that protrudes outward from the outer periphery of the vehicle compartment body, is provided along the circumferential direction centered on the axis, and is connected to another member in the axial direction which is the direction of extension of the axis, Equipped with, The connecting flange is notched at the upper end or horizontal end, The connecting flange has a plurality of bolt holes into which bolts are inserted in the axial direction, The connecting flange includes, in the circumferential direction, a first region including the upper end or the horizontal end, and a second region excluding the upper end and the horizontal end. The arrangement density of the bolt holes in the first region is smaller than the arrangement density of the bolt holes in the second region. Vehicle compartment.

11. A vehicle housing body that covers the outer circumference of a rotor that rotates about an axis, A connecting flange that protrudes outward from the outer periphery of the vehicle compartment body, is provided along the circumferential direction centered on the axis, and is connected to another member in the axial direction which is the direction of extension of the axis, Equipped with, The connecting flange is notched at the upper end or horizontal end, The connecting flange has a plurality of bolt holes into which bolts are inserted in the axial direction, The connecting flange includes, in the circumferential direction, a first region including the upper end or the horizontal end, and a second region excluding the upper end and the horizontal end. The plurality of bolt holes include at least one first bolt hole located in the first region and a plurality of second bolt holes located in the second region. The diameter of the first bolt hole is smaller than the diameter of the second bolt hole. Vehicle compartment.

12. A vehicle housing body that covers the outer circumference of a rotor that rotates about an axis, A connecting flange that protrudes outward from the outer periphery of the vehicle compartment body, is provided along the circumferential direction centered on the axis, and is connected to another member in the axial direction which is the direction of extension of the axis, Equipped with, The aforementioned connecting flange is notched at its upper end, The connecting flange has a plurality of bolt holes into which bolts are inserted in the axial direction, The plurality of bolt holes have three or more bolt holes within a first distance, At the upper end, the bolt hole does not exist for a distance greater than the first distance. Vehicle compartment.

13. A vehicle housing body that covers the outer circumference of a rotor that rotates about an axis, A connecting flange that protrudes outward from the outer periphery of the vehicle compartment body, is provided along the circumferential direction centered on the axis, and is connected to another member in the axial direction which is the direction of extension of the axis, Equipped with, The connecting flange is notched at the upper end or horizontal end, The connecting flange has a plurality of bolt holes into which bolts are inserted in the axial direction, The connecting flange includes, in the circumferential direction, a first region having an angular range of 30 degrees centered on the vertical or horizontal direction and including at least a part of the upper end or at least a part of the horizontal end, and a second region having an angular range of 30 degrees centered on a 45-degree angle. The sum of the cross-sectional areas of the bolt holes in the first region is less than the sum of the cross-sectional areas of the bolt holes in the second region. Vehicle compartment.

14. A vehicle compartment according to any one of claims 1 to 13, An axial flow rotating machine equipped with [a specific feature].

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