Rotary machine casing support structure and rotary machine

Abstract

According to one embodiment, the present invention provides a rotating-machine casing support structure including: a casing; a built-in component that is disposed inside an interior space of the casing at a lateral side of a rotor and that is supported by the casing; a protruding part that is provided so as to protrude laterally outside of the casing from a side of the casing; and a support part that supports the protruding part laterally outside of the casing.

Description

[Technical field]

[0001] The present disclosure relates to a casing support structure for a rotary machine and a rotary machine. This application claims priority based on Patent Application No. 2022-025876, filed with the Japan Patent Office on February 22, 2022, the contents of which are incorporated herein by reference. [Background technology]

[0002] In rotary machines such as steam turbines and gas turbines, protrusions called "cat feet" are provided in the casing that houses the rotating members (rotor and moving blades) and stationary members (blade rings and stationary vanes), and the casing is known to be supported via these protrusions (cat feet). Specifically, a support member called a casing support is erected on the ground, and the casing is supported by placing a protrusion on the support joint surface of the casing support (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4410651 Summary of the Invention [Problem to be solved by the invention]

[0004] In rotary machines that operate at high temperatures, such as steam turbines and gas turbines, various thermal deformations occur during turbine operation. For example, if the casing warps vertically due to thermal deformation during operation of a steam turbine, the internal objects supported by the casing inside the casing, such as the blade ring, also move up and down, which may cause a difference in vertical displacement with the rotor, resulting in contact with the seal fins, or conversely, excessive clearance, which may lead to shaft vibration and performance degradation. For this reason, it is desirable to suppress the difference in vertical displacement between the internal objects and the rotor.

[0005] In view of the above circumstances, at least one embodiment of the present disclosure aims to suppress a vertical displacement difference between an internal structure and a rotor in a rotary machine. [Means for solving the problem]

[0006] (1) A casing support structure for a rotary machine according to at least one embodiment of the present disclosure includes: The car cabin and an internal structure disposed in an internal space of the casing at a side of the rotor and supported by the casing; A protruding portion protruding from a side portion of the vehicle compartment toward a lateral outer side of the vehicle compartment; a support portion that supports the protrusion at a lateral outer side of the vehicle compartment; Equipped with.

[0007] (2) A rotary machine according to at least one embodiment of the present disclosure includes: A casing support structure for a rotary machine having the configuration of (1) above; The rotor; Equipped with. Effect of the Invention

[0008] According to at least one embodiment of the present disclosure, the vertical displacement difference between an internal structure and a rotor in a rotary machine can be suppressed. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a schematic diagram for explaining a steam turbine as an example of a rotary machine. [Diagram 2] FIG. 1 is a diagram illustrating a schematic side view of a steam turbine according to some embodiments. [Figure 3A] 1 is a schematic cross-sectional view of a high-pressure turbine as an example of a steam turbine according to some embodiments, viewed from above. [Figure 3B] FIG. 2 is a schematic cross-sectional view of a high / intermediate pressure turbine as another example of a steam turbine according to some embodiments, viewed from above. [Figure 4]4 is a cross-sectional view taken along the line IV-IV in FIG. 3A. [Diagram 5] FIG. 3B is a cross-sectional view taken along the line VV in FIG. 3A. [Figure 6] FIG. 1 is a diagram showing an example of a support structure for a casing of a conventional rotary machine. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, some embodiments of the present disclosure will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of components described as the embodiments or shown in the drawings are merely illustrative examples and are not intended to limit the scope of the present disclosure. For example, expressions expressing relative or absolute configuration, such as "in a certain direction," "along a certain direction," "parallel," "orthogonal," "center," "concentric," or "coaxial," not only strictly express such a configuration, but also express a state in which there is a relative displacement with a tolerance or an angle or distance to the extent that the same function is obtained. For example, expressions indicating that things are in an equal state, such as "identical," "equal," and "homogeneous," not only indicate a state of strict equality, but also indicate a state in which there is a tolerance or a difference to the extent that the same function is obtained. For example, expressions describing shapes such as a rectangular shape or a cylindrical shape do not only refer to rectangular shapes, cylindrical shapes, etc. in the strict geometric sense, but also refer to shapes that include uneven portions, chamfered portions, etc., to the extent that the same effect is obtained. On the other hand, the expressions "comprise," "include," "have," "includes," or "have" of one element are not exclusive expressions excluding the presence of other elements.

[0011] (Regarding steam turbine 100) 1 is a schematic diagram for explaining a steam turbine as an example of a rotary machine. The steam turbine 100 as an example of a rotary machine includes a rotor 3 extending along an axis AX, a casing 2 covering the rotor 3 from the outer periphery side, a journal bearing 4A that supports a shaft end 11 of the rotor 3 rotatably around the axis AX, and a thrust bearing 4B.

[0012] The rotor 3 has a rotating shaft 1 extending along the axis AX, and a plurality of rotor blades 30 provided on the outer circumferential surface of the rotating shaft 1. The rotor blades 30 are arranged at regular intervals in the circumferential direction of the rotating shaft 1. A row of a plurality of rotor blades 30 is also arranged at regular intervals in the direction of the axis AX. The rotor blade 30 has a rotor blade main body 31 and a rotor blade shroud 34. The rotor blade main body 31 protrudes radially outward from the outer circumferential surface of the rotor 3. The rotor blade main body 31 has an airfoil-shaped cross section when viewed from the radial direction. The rotor blade shroud 34 is provided at the tip (radially outer end) of the rotor blade main body 31.

[0013] The casing 2 has a generally cylindrical shape that covers the rotor 3 from the outer periphery. A steam supply pipe 12 that takes in steam S is provided on one side of the casing 2 in the direction of the axis AX. A steam exhaust pipe 13 that exhausts steam S is provided on the other side of the casing 2 in the direction of the axis AX. Steam flows from one side to the other side in the direction of the axis AX inside the casing 2. In the following description, the direction in which steam flows is simply referred to as the "flow direction." Furthermore, the side where the steam supply pipe 12 is located as viewed from the steam exhaust pipe 13 is referred to as the upstream side of the flow direction, and the side where the steam exhaust pipe 13 is located as viewed from the steam supply pipe 12 is referred to as the downstream side of the flow direction.

[0014] A row of a plurality of stator vanes 20 is provided on the inner peripheral surface of the casing 2. The stator vane 20 has a stator vane body 21 and a stator vane shroud 22. The stator vane body 21 is a vane-shaped member attached to a blade ring (blade ring 212, high-pressure turbine blade ring 222, and intermediate-pressure turbine blade ring 232) described later. Furthermore, the stator vane shroud 22 is provided at the tip end (the radially inner end) of the stator vane body 21. Like the rotor blade 30, a plurality of stator vanes 20 are arranged on the inner peripheral surface along the circumferential direction and the axis AX direction. The rotor blade 30 is arranged so as to enter the area between the plurality of adjacent stator vanes 20. In other words, the stator vane 20 and the rotor blade 30 extend in a direction intersecting the steam flow direction (radial direction with respect to the axis AX). In the following description, the direction in which the rotor 3 extends, i.e., the direction of the axis AX ofIn the following description, the radial direction with respect to the axis AX will be simply referred to as the radial direction, and the circumferential direction with respect to the axis AX will be simply referred to as the circumferential direction.

[0015] FIG. 2 is a diagram showing a schematic external appearance of a steam turbine 100 according to some embodiments, as seen from the side. In FIG. 2, the rotor 3 and the journal bearing 4A are omitted. As shown in FIG. 2, in the steam turbine 100 according to some embodiments, the casing 2 is divided into two parts, an upper half being a casing upper half 2U, and a lower half being a casing lower half 2L. The casing upper half 2U and the casing lower half 2L are symmetrical with respect to a horizontal division plane Sd extending in a horizontal plane (excluding the piping portion). The casing upper half 2U has a semi-cylindrical upper half casing body 21U and an upper half flange portion 23U that protrudes outward from an edge of the upper half casing body 21U. Similarly, the casing lower half 2L has a semi-cylindrical lower half casing body 21L and a lower half flange portion 23L that protrudes outward from an edge of the lower half casing body 21L. The upper and lower casing halves 2U and 2L are fastened together by bolts, nuts, etc. (not shown) with the lower surface of the upper flange portion 23U and the upper surface of the lower flange portion 23L abutting against each other within the horizontal dividing plane Sd.

[0016] In a steam turbine 100 according to some embodiments, a protrusion 24 is formed in the casing 2, protruding from a side of the casing 2 to the lateral outer side (radial outer side) of the casing 2. For example, in the example shown in Fig. 2, two protrusions 24 spaced apart in the extending direction of the axis AX are provided on each of the lateral outer side on one side and the lateral outer side on the other side of the casing upper half 2U. In the steam turbine 100 according to some embodiments, each of the four protrusions 24 is supported on the turbine frame 29 via the outer support portion 27, and thus the casing 2 is supported on the turbine frame 29.

[0017] Steam S is supplied to the interior of the casing 2 configured as described above through the upstream steam supply pipe 12. On its way through the interior of the casing 2, the steam S alternately passes through flow passages configured respectively of the stator vanes 20 and the rotor blades 30. The stator vanes 20 straighten the flow of the steam S, and the straightened steam S pushes the rotor blades 30, thereby providing a rotational force to the rotor 3. The rotational force of the rotor 3 is extracted from the shaft end 11 and used to drive external equipment (such as a generator). As the rotor 3 rotates, the steam S is discharged through the downstream steam exhaust pipe 13 toward a subsequent device (such as a condenser).

[0018] The journal bearings 4A support loads in the radial direction relative to the axis AX. One journal bearing 4A is provided at each end of the rotor 3. The thrust bearings 4B support loads in the direction of the axis AX. The thrust bearings 4B are provided only at the upstream end of the rotor 3.

[0019] FIG. 3A is a schematic cross-sectional view of a high-pressure turbine 100HP as an example of a steam turbine 100 according to some embodiments, viewed from above, and corresponds to the cross-sectional view taken along the arrows III-III in FIG. Figure 3B is a schematic cross-sectional view of a high-intermediate pressure turbine 100HIP viewed from above as another example of a steam turbine 100 according to some embodiments, and corresponds to the cross-sectional view taken along the III-III arrow in Figure 2. FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 3A. FIG. 5 is a cross-sectional view taken along the line VV of FIG. 3A. 3A to 5, the rotor 3 and the rotor blades 30 attached to the rotor 3 are omitted.

[0020] In the following description, when there is no particular distinction between the high-pressure turbine 100HP shown in Figure 3A and the high-intermediate pressure turbine 100HIP shown in Figure 3B, or when the high-pressure turbine 100HP and the high-intermediate pressure turbine 100HIP shown in Figure 3B are referred to collectively, they will be simply referred to as steam turbine 100. As shown in FIGS. 3A to 5 , the steam turbine 100 according to some embodiments has an internal space of the casing 2 on the side of the rotor 3. within 203 and an internal structure 200 supported by the vehicle compartment 2. In the steam turbine 100 according to some embodiments shown in FIGS. 3A to 5 , the casing 2 is an outer casing 201.

[0021] (High pressure turbine 100HP) The high-pressure turbine 100HP shown in FIG. 3A is an internal space of the casing 2 (outer casing 201). within 203 The internal components 200 arranged in the rotor 210 include an internal casing 211, a blade ring 212, and a dummy ring 213. The high-pressure turbine 100HP shown in Fig. 3A is equipped with an inlet side inner gland 214 and an outlet side inner gland 215. In the high-pressure turbine 100HP shown in Fig. 3A, the inlet side inner gland 214 and the outlet side inner gland 215 are attached to openings at the upstream end and downstream end of the casing 2 (external casing 201). Generally, the inlet side inner gland 214 and the outlet side inner gland 215 of the high pressure turbine 100HP shown in FIG. 3A are also included in the built-in components of the casing 2. In this specification, however, they are also included in the internal space of the outer casing 201. within 203 The internal structure disposed in the inner gland 214 is simply referred to as internal structure 200. In this specification, the internal structure 200 does not include the inlet side inner gland 214 and the outlet side inner gland 215.

[0022] The high-pressure turbine 100HP shown in Figure 3A also has an inlet side outer gland 216 attached to the upstream end of the casing 2, and an outlet side outer gland 217 attached to the downstream end of the casing 2.

[0023] In the high-pressure turbine 100HP shown in Fig. 3A, the inner casing 211 includes an inner casing upper half 211U and an inner casing lower half 211L as shown in Fig. 4. The inner casing upper half 211U and the inner casing lower half 211L are connected by fastening members (not shown) such as bolts. The inner casing upper half 211U shown in FIG. 4 has an inner casing protrusion 211P that protrudes horizontally toward the outside in the radial direction centered on the axis line AX.

[0024] In the high pressure turbine 100HP shown in FIG. 3A, an inner casing 211 holds a blade ring 212 and a dummy ring 213 on the radially inner side.

[0025] In the high pressure turbine 100HP shown in Fig. 3A, the blade ring 212 includes a blade ring upper half 212U and a blade ring lower half 212L as shown in Fig. 4. The blade ring upper half 212U and the blade ring lower half 212L are connected by fastening members (not shown) such as bolts. The blade ring upper half 212U shown in FIG. 4 has a blade ring protrusion 212P that protrudes horizontally outward in the radial direction centered on the axis line AX.

[0026] In the high-pressure turbine 100HP shown in FIG. 3A, an inner support portion 25 for supporting the internal components 200 is formed in the lower half 2L of the external casing 201, protruding radially inward near the horizontal dividing plane Sd. For example, in the example shown in FIG. 3A, two inner support parts 25 spaced apart in the extending direction of the axis AX are provided on one lateral inner side (radially inner side) of the lower half of the vehicle interior 2L and the other lateral inner side. The inner support portion 25 supports the inner casing projection 211P or the blade ring projection 212P from below with an upper surface 25a of the inner support portion 25 abutting against a lower surface of the inner casing projection 211P or the blade ring projection 212P.

[0027] (High and intermediate pressure turbine 100HIP) The high / intermediate pressure turbine 100HIP shown in FIG. 3B has an internal space of the casing 2 (outer casing 201). within 203 The internal structure 200 includes a high-pressure turbine inner casing 221, a high-pressure turbine blade ring 222, a first dummy ring 223, and an intermediate-pressure turbine blade ring 232. The high / intermediate pressure turbine 100HIP shown in Fig. 3B includes a second dummy ring 228, a high pressure side inner gland 224, and an intermediate pressure side inner gland 235. In the high / intermediate pressure turbine 100HIP shown in Fig. 3B, the second dummy ring 228, the high pressure side inner gland 224, and the intermediate pressure side inner gland 235 are attached to openings at the upstream end and downstream end of the casing 2 (external casing 201). Generally, the second dummy ring 228, the high pressure side inner gland 224, and the intermediate pressure side inner gland 235 provided in the high / intermediate pressure turbine 100HIP shown in FIG. 3B are also included in the built-in components of the casing 2. However, as described above, in this specification, the internal space of the outer casing 201 is also included in the built-in components of the casing 2. within 203 The internal components disposed in the inner gland 224 and the inner gland 235 are simply referred to as internal components 200. In this specification, internal components 200 do not include second dummy ring 228, high pressure side inner gland 224, and medium pressure side inner gland 235.

[0028] In addition, the high / intermediate pressure turbine 100HIP shown in Figure 3B is equipped with a high pressure side outer gland 226 attached to one end of the casing 2 in which the high pressure turbine section is provided, and an intermediate pressure side outer gland 237 attached to the other end of the casing 2 in which the intermediate pressure turbine section is provided.

[0029] In the high / intermediate pressure turbine 100HIP shown in Fig. 3B, the high pressure turbine internal casing 221 includes an internal casing upper half 221U and an internal casing lower half 221L, similar to the internal casing 211 of the high pressure turbine 100HP shown in Fig. 4. The internal casing upper half 221U and the internal casing lower half 221L are connected by fastening members (not shown) such as bolts. The inner casing upper half 221U has an inner casing protrusion 221P that protrudes horizontally toward the outside in the radial direction centered on the axis line AX. In the high / intermediate pressure turbine 100HIP shown in FIG. 3B, two internal casing protrusions 221P spaced apart in the direction in which the axis AX extends are provided on one lateral outer side (radial outer side) and the other lateral outer side of the internal casing upper half 221U.

[0030] In the high / intermediate pressure turbine 100HIP shown in FIG. 3B, a high pressure turbine inner casing 221 holds a high pressure turbine blade ring 222 and a first dummy ring 223 on the radially inner side.

[0031] In the high / intermediate pressure turbine 100HIP shown in Fig. 3B, the high pressure turbine blade ring 222 includes a blade ring upper half 222U and a blade ring lower half 222L, similar to the blade ring 212 of the high pressure turbine 100HP shown in Fig. 4. The blade ring upper half 222U and the blade ring lower half 222L are connected by fastening members (not shown) such as bolts. The blade ring upper half portion 222U has a blade ring projection 222P that projects horizontally outward in the radial direction centered on the axis line AX.

[0032] In the high / intermediate pressure turbine 100HIP shown in Fig. 3B, the intermediate pressure turbine blade ring 232 includes a blade ring upper half 232U and a blade ring lower half 232L, similar to the blade ring 212 of the high pressure turbine 100HP shown in Fig. 4. The blade ring upper half 232U and the blade ring lower half 232L are connected by fastening members (not shown) such as bolts. The blade ring upper half portion 232U has a blade ring projection 232P that projects horizontally toward the outside in the radial direction centered on the axis line AX.

[0033] In the high / intermediate pressure turbine 100HIP shown in FIG. 3B, an inner support portion 25 for supporting the internal components 200 is formed in the lower half 2L of the external casing 201, protruding radially inward near the horizontal dividing plane Sd. For example, in the example shown in FIG. 3B, four inner support parts 25 are provided on one lateral inner side (radially inner side) of the lower half of the vehicle interior 2L and on the other lateral inner side, spaced apart in the direction in which the axis AX extends. The upper surface 25a of the inner support portion 25 abuts against the lower surface of either the internal casing protrusion 221P, the blade ring protrusion 222P of the high-pressure turbine blade ring 222, or the blade ring protrusion 232P of the intermediate-pressure turbine blade ring 232, and supports either the internal casing protrusion 221P, the blade ring protrusion 222P of the high-pressure turbine blade ring 222, or the blade ring protrusion 232P of the intermediate-pressure turbine blade ring 232 from below.

[0034] In rotary machines that operate under high temperatures, such as steam turbines and gas turbines, various thermal deformations occur during the operation of the turbine. For example, if the casing 2 is deformed by thermal deformation so as to be warped in the vertical direction during operation of the steam turbine 100, the internal objects supported by the casing inside the casing 2, such as the blade ring, also move up and down, which may cause a difference in vertical displacement with the rotor 3, resulting in contact with a seal fin (not shown) provided on the rotor blade shroud 34, or conversely, an excessive clearance, which may cause shaft vibration or performance degradation. For this reason, it is desirable to suppress the difference in vertical displacement between the internal objects and the rotor 3.

[0035] Therefore, in the rotary machine casing support structure according to some embodiments, the vertical displacement difference between the built-in objects and the rotor 3 is suppressed as described below. That is, as shown in Figures 2 to 5, the casing support structure 10 of a steam turbine 100 in some embodiments comprises a casing 2 (external casing 201), an internal part 200 arranged in the internal space 203 of the casing 2 (external casing 201) to the side of the rotor 3 and supported by the casing 2 (external casing 201), a protrusion 24 protruding from the side of the casing 2 (external casing 201) to the lateral outside (radial outside) of the casing 2 (external casing 201), and a support part (outer support part 27) that supports the protrusion 24 on the lateral outside of the casing 2 (external casing 201).

[0036] Fig. 6 is a diagram showing an example of a support structure of a casing of a conventional rotary machine. A steam turbine 100X as an example of a conventional rotary machine shown in Fig. 6 includes a casing 2X including a casing upper half 2XU which is an upper half of the casing divided vertically into two parts, and a casing lower half 2XL which is a lower half of the casing. 6, protrusions 24X protrude in the direction of the axis AX from the lower half 2XL of the vehicle interior at both ends in the direction of the axis AX. The protrusions 24X are provided on the lateral outer side (radial outer side) of one side of the vehicle interior 2X and the lateral outer side of the other side of the vehicle interior 2X. In the example shown in FIG. 6, each of the four protruding portions 24X is supported on the turbine frame 29 via a support 27X, so that the casing 2X is supported on the turbine frame 29.

[0037] In the support structure of the casing of the conventional rotary machine, the protruding portion 24X extending to a position away from the casing 2X in the direction of the axis AX is supported by the support column 27X at a position away from the casing 2X in the direction of the axis AX. Therefore, when the casing 2X is deformed to be warped in the vertical direction due to thermal deformation, the casing 2X moves up and down relative to the turbine frame 29 that supports the casing 2X. As a result, the built-in objects that are arranged in the internal space of the casing 2X and supported by the casing 2X, such as the blade ring, also move up and down relative to the turbine frame 29 that supports the casing 2X. Therefore, a vertical displacement difference occurs with the rotor that is separately supported by the turbine frame 29 that supports the casing 2X, which may cause contact of the seal fins, or conversely, the clearance may become excessive, which may cause shaft vibration or performance degradation.

[0038] When the casing 2 is deformed so as to warp in the vertical direction, the difference in vertical displacement between the internal structure 200 and the rotor 3 increases as the support position of the protrusion 24 by the support part (outer support part 27) moves away from the casing 2 in the direction of the axis AX. According to the casing support structure 10 according to some embodiments, the casing support structure 10 can be mounted on the casing of a conventional rotary machine. cabin Compared to the support structure, the protrusion 24 and the support part (outer support part 27) are closer to the casing 2 in the direction of the axis AX. This makes it possible to reduce the vertical displacement difference between the built-in object 200 and the rotor 3 compared to the casing support structure of a conventional rotary machine. This makes it difficult for axial vibration to occur due to contact with the seal fins, and enables performance improvement by reducing the clearance between the rotating members (the rotor 3 and the rotor blades 30) and the stationary members (the blade ring 212, the high-pressure turbine blade ring 222, the intermediate-pressure turbine blade ring 232 and the stator blades 20).

[0039] For example, the deformation due to thermal expansion of the passenger compartment 2 may have been assumed in the design stage to cause the compartment 2 to warp and protrude upward, but in reality the deformation may result in the compartment 2 warping and protruding downward, which may differ from what was assumed in the design stage. Even in such a case, according to the vehicle interior support structure 10 according to some embodiments, the vertical displacement difference between the internal structure 200 and the rotor 3 can be reduced. ofSince the clearance can be reduced, even if deformation due to thermal expansion of the casing 2 tends to differ from that assumed at the design stage, axial vibration due to contact with the seal fins is less likely to occur, and performance can be improved by reducing the clearance between the rotating and stationary components.

[0040] A steam turbine 100 according to some embodiments includes a casing support structure 10 according to some embodiments and a rotor 3. This makes it possible to reduce the difference in vertical displacement between the internal structure 200 and the rotor 3, as compared with a rotary machine having a casing support structure of a conventional rotary machine. Therefore, in the steam turbine 100 according to some embodiments, shaft vibration due to contact with the seal fins is less likely to occur, and performance can be improved by reducing the clearance between the rotating and stationary members.

[0041] In the vehicle interior support structure 10 according to some embodiments, the protrusion 24 and the outer support portion 27 may be provided at a position overlapping with the internal structure 200 in the direction of the axis AX. This makes it possible to reduce the difference in vertical displacement between the built-in object 200 and the rotor 3, as compared with the case of a conventional casing support structure for a rotary machine.

[0042] In the vehicle interior support structure 10 according to some embodiments, the internal object 200 may be supported by the vehicle interior 2 at at least two support positions that are different in position in the direction of the axis line AX. The at least two support positions may include a first support position P1 located on the most one side in the direction of the axis line AX, and a second support position P2 located on the most other side. The protrusion 24 and the outer support portion 27 may be located between the first support position P1 and the second support position P2 in the direction of the axis line AX.

[0043] For example, in the high-pressure turbine 100HP shown in FIG. 3A, the first support position P1 is, for example, a position in the axis AX direction of the inner support part 25 that supports the internal casing protrusion 211P, and the second support position P2 is, for example, a position in the axis AX direction of the inner support part 25 that supports the blade ring protrusion 212P.

[0044] For example, in the high / intermediate pressure turbine 100HIP shown in Figure 3B, the first support position P1 is, for example, a position in the axis AX direction of the inner support part 25 that supports the blade ring protrusion 222P of the high pressure turbine blade ring 222, and the second support position P2 is, for example, a position in the axis AX direction of the inner support part 25 that supports the blade ring protrusion 232P of the intermediate pressure turbine blade ring 232.

[0045] When the casing 2 is deformed to warp in the vertical direction, it is generally deformed to protrude most in the vertical direction near the center in the direction of the axis AX. Therefore, when the support position of the protruding portion 24 by the outer support portion 27 approaches the center of the casing 2 in the direction of the axis AX, the vertical displacement difference between the center of the casing 2 and the support surface 27a where the outer support portion 27 supports the protruding portion 24 from below becomes smaller. Furthermore, when the support position where the compartment 2 supports the internal contents 200 and the support position of the protrusion 24 by the outer support part 27 approach each other in the direction of the axis AX, even if the compartment 2 deforms so as to warp in the vertical direction, the vertical displacement difference between the internal contents 200 at the support position where the compartment 2 supports the internal contents 200 and the support surface 27a where the outer support part 27 supports the protrusion from below becomes smaller. According to the casing support structure 10 according to some embodiments, the difference in vertical displacement between the internal object 200 and the rotor 3 can be made smaller.

[0046] In the vehicle interior support structure 10 according to some embodiments, the protrusion 24 may include a first protrusion 241 and a second protrusion 242 spaced apart in the axis AX direction from the first protrusion 241. At least one of the first protrusion 241 and the second protrusion 242 may overlap in the axis AX direction with a support position where the vehicle interior 2 supports the internal object 200.

[0047] For example, in the high-pressure turbine 100HP shown in Fig. 3A, the first protruding portion 241 is, for example, the protruding portion 24 overlapping in the axis line AX direction with the inner support portion 25 supporting the internal casing protrusion 211P, and the second protruding portion 242 is, for example, the protruding portion 24 overlapping in the axis line AX direction with the inner support portion 25 supporting the blade ring protrusion 212P. Note that in the high-pressure turbine 100HP shown in Fig. 3A, as long as either the first protruding portion 241 or the second protruding portion 242 overlaps with the inner support portion 25 in the axis line AX direction, the other does not need to overlap with the inner support portion 25 in the axis line AX direction.

[0048] For example, in the high / intermediate pressure turbine 100HIP shown in Figure 3B, the first protrusion 241 is a protrusion 24 that overlaps in the direction of the axis AX with, for example, the inner support portion 25 that supports the blade ring protrusion 222P of the high pressure turbine blade ring 222 and the inner support portion 25 that supports the internal casing protrusion 221P. In the high / intermediate pressure turbine 100HIP shown in FIG. 3B, the second protruding portion 242 is, for example, the protruding portion 24 located in the vicinity of the inner support portion 25 that supports the blade ring protrusion 232P of the intermediate pressure turbine blade ring 232. In the high / intermediate pressure turbine 100HIP shown in FIG. 3B, the first protrusion 241 may overlap in the direction of the axis AX with, for example, only one of the inner support portion 25 supporting the blade ring protrusion 222P of the high pressure turbine blade ring 222 or the inner support portion 25 supporting the internal casing protrusion 221P.

[0049] According to the casing support structure 10 according to some embodiments, the difference in vertical displacement between the internal object 200 and the rotor 3 can be made smaller.

[0050] In the high / intermediate pressure turbine 100HIP shown in FIG. 3B, the second protrusion 242 does not overlap with the inner support portion 25 that supports the blade ring protrusion portion 232P of the intermediate pressure turbine blade ring 232 in the direction of the axis AX, but may overlap. That is, in the vehicle compartment support structure 10 according to some embodiments, the internal object 200 may be supported by the external vehicle compartment 201 at at least two support positions that are different in position in the axis line AX direction. The first protrusion 241 and the second protrusion 242 may overlap with the at least two support positions in the axis line AX direction. This allows the difference in vertical displacement between the internal structure 200 and the rotor 3 to be further reduced.

[0051] In the vehicle compartment support structure 10 according to some embodiments, the external vehicle compartment 201 may be divided into a vehicle compartment lower half 2L and a vehicle compartment upper half 2U at a horizontal dividing plane Sd. The protrusion 24 may be provided in the vehicle compartment upper half 2U.

[0052] In general, the built-in objects are supported by the casing at a height position close to the horizontal dividing plane of the casing. Therefore, if the support surface 27a of the outer support part 27 that supports the protruding part 24 from below is separated from the height position of the horizontal dividing plane Sd of the casing 2 (external casing 201), the built-in objects are easily affected by thermal expansion in the height direction of the members interposed between the casing 2 (external casing 201) and the support surface 27a, and the vertical displacement difference between the support surface 27a and the horizontal dividing plane Sd tends to become large. Therefore, in order to suppress the influence of such thermal expansion, it is desirable that the height positions of the support surface 27a and the horizontal dividing surface Sd are close to each other. In addition, the support surface 27a of the outer support portion 27 supporting the protruding portion 24 from below abuts against the lower surface of the protruding portion 24. Therefore, if the protruding portion 24 is provided in the upper half portion 2U of the passenger compartment, it becomes easier to bring the support surface 27a closer to the height position of the horizontal dividing plane Sd. According to some embodiments of the vehicle compartment support structure 10, the protrusion 24 is provided in the upper half 2U of the vehicle compartment, making it easier to bring the support surface 27a closer to the height position of the horizontal dividing surface Sd, and making it easier to suppress the vertical displacement difference between the support surface 27a and the horizontal dividing surface Sd.

[0053] In the vehicle interior support structure 10 according to some embodiments, the vertical height position of the support surface 27a may be substantially the same as the height position of the horizontal dividing surface Sd. In addition, the vertical height position of the support surface 27a being substantially the same as the height position of the horizontal dividing surface Sd includes not only the case where the vertical height position of the support surface 27a is the height position of the horizontal dividing surface Sd, but also the case where the vertical height position of the support surface 27a deviates from the height position of the horizontal dividing surface Sd to an extent that the difference in vertical displacement between the internal components 200 and the rotor 3 caused by tolerances or the influence of thermal expansion in the height direction of the components interposed between the casing 2 (external casing 201) and the support surface 27a can be negligible. This makes it easier to suppress the difference in vertical displacement between the support surface 27a and the horizontal dividing surface Sd.

[0054] In some embodiments of the vehicle cabin support structure 10, a temperature control device such as a heater may be provided on the outer support portion 27 to control the vertical height position of the support surface 27a of the outer support portion 27, thereby making it possible to appropriately adjust the vertical displacement difference between the internal structure 200 and the rotor 3. 2, the vehicle interior support structure 10 according to some embodiments may include a heater 51 for heating the outer support portion 27 and a heater control device 53 for controlling the heater 51. In addition, the vehicle interior support structure 10 according to some embodiments may include a temperature sensor 55 for measuring the temperature of the outer support portion 27. The heater control device 53 is a control device configured to be able to control the power supplied to the heater 51 based on the temperature of the outer support part 27 measured by the temperature sensor 55 . In the casing support structure 10 according to some embodiments, the temperature of the outer support part 27 can be appropriately controlled by the heater 51 to adjust the thermal expansion of the outer support part 27 and adjust the height position of the support surface 27a of the outer support part 27. This allows the height position of the internal object 200 to be controlled by controlling the temperature of the outer support part 27 by the heater 51, so that the vertical displacement difference between the internal object 200 and the rotor 3 can be further reduced.

[0055] In some embodiments of the casing support structure 10, the casing 2 may be an external casing 201, and the internal components 200 may include an internal casing (internal casing 211, high-pressure turbine internal casing 221). As a result, in a steam turbine 100 including an external casing 201 and an internal casing (internal casing 211, high-pressure turbine internal casing 221), the vertical displacement difference between the internal components 200 and the rotor 3 can be reduced compared to the casing support structure of conventional rotary machines.

[0056] In the steam turbine 100 according to some embodiments, the casing 2 also thermally elongates in the axial direction. Therefore, it is preferable to set a restriction position for restricting the axial movement of the casing 2 at one end in the axial direction of the casing 2. For example, it is preferable to set the restriction position for restricting the axial movement of the casing 2 at one end of both ends in the axial direction of the casing 2, where a thrust bearing 4B (see FIG. 1 ) for restricting the axial movement of the rotor 3 is provided. Specifically, as shown in Fig. 2, for example, a centering beam 61 may be provided at one of both axial ends of the casing 2, which end is provided with a thrust bearing 4B (see Fig. 1) for restricting axial movement of the rotor 3. One axial end of the centering beam 61 is connected to the casing 2, and the other end is connected to, for example, the thrust bearing 4B. Note that the thrust bearing 4B may be movable in the axial direction relative to the turbine cradle 29, or may be immovable in the axial direction relative to the turbine cradle 29.

[0057] Therefore, when the casing 2 thermally expands in the axial direction, the casing 2 and the rotor 3 move in the same direction relative to the thrust bearing 4B, thereby reducing the possibility of axial contact between the rotating members (rotor and rotor blades) and the stationary members (blade ring and stator vanes). In addition, in the vehicle interior support structure 10 according to some embodiments, the outer support portion 27 is configured so as not to restrict the movement of the protrusion 24 in the axial direction.

[0058] The present disclosure is not limited to the above-described embodiments, and includes modifications to the above-described embodiments and appropriate combinations of these modifications. For example, in the steam turbine 100 according to some of the above-described embodiments, the casing 2 is surrounded on the outside by a heat-insulating member (not shown). Therefore, in the casing support structure 10 according to some of the embodiments, the outer support part 27 may be surrounded by a heat-insulating member (not shown) together with the casing 2, or the outer support part 27 may be disposed outside the heat-insulating member surrounding the casing 2.

[0059] The steam turbine 100 according to some embodiments may be an intermediate-pressure turbine. Also, the steam turbine 100 according to some embodiments may be a low-pressure turbine or a low-intermediate-pressure turbine. Furthermore, the rotary machine according to some embodiments is not limited to the steam turbine 100, but may be a rotary machine that operates under high temperatures, such as a gas turbine.

[0060] The contents described in each of the above embodiments can be understood, for example, as follows. (1) The casing support structure of a rotary machine according to at least one embodiment of the present disclosure comprises a casing 2 (external casing 201), an internal part 200 arranged in an internal space 203 of the casing 2 (external casing 201) to the side of the rotor 3 and supported by the casing 2 (external casing 201), a protrusion 24 protruding from the side of the casing 2 (external casing 201) to the lateral outside (radial outside) of the casing 2 (external casing 201), and a support part (outer support part 27) supporting the protrusion 24 on the lateral outside of the casing 2 (external casing 201).

[0061] According to the above configuration (1), the cabin Compared to the support structure, the protrusions and supports are closer to the casing in the extension direction of the rotor. This makes it possible to reduce the difference in vertical displacement between the built-in objects and the rotor compared to the casing support structure of conventional rotating machines. This makes it less likely for axial vibration to occur due to contact with the seal fins, and improves performance by reducing the clearance between the rotating components (rotor and moving blades) and the stationary components (blade ring and stationary vanes).

[0062] (2) In some embodiments, in the configuration of (1) above, the protrusion 24 and the support portion (outer support portion 27) may be provided at a position where they overlap in the extension direction (axis AX direction) of the internal structure 200 and the rotor 3.

[0063] According to the above configuration (2), the difference in vertical displacement between the built-in object 200 and the rotor 3 can be made smaller than in the conventional casing support structure of a rotary machine.

[0064] (3) In some embodiments, in the configuration of (1) or (2) above, the internal structure 200 may be supported by the casing 2 (external casing 201) at at least two support positions that are different in the extension direction (axis AX direction) of the rotor 3. The at least two support positions may include a first support position P1 located on one side of the extension direction (external casing 201) of the rotor 3, and a second support position P2 located on the other side. The protrusion 24 and the support portion (outer support portion 27) may be located between the first support position P1 and the second support position P2 in the extension direction (axis AX direction) of the rotor 3.

[0065] According to the above configuration (3), the difference in vertical displacement between the built-in object and the rotor can be further reduced.

[0066] (4) In some embodiments, in any of the configurations (1) to (3) above, the protruding portion 24 may include a first protruding portion 241 and a second protruding portion 242 spaced apart from the first protruding portion 241 in the extension direction (axis AX direction) of the rotor 3. At least one of the first protruding portion 241 and the second protruding portion 242 may overlap, in the extension direction (axis AX direction) of the rotor 3, with a support position where the casing 2 (external casing 201) supports the internal object 200.

[0067] According to the above configuration (4), the difference in vertical displacement between the internal structure 200 and the rotor 3 can be made smaller.

[0068] (5) In some embodiments, in the configuration of (4) above, the internal structure 200 may be supported by the casing 2 (external casing 201) at at least two support positions that are different in the extension direction (axis AX direction) of the rotor 3. The first protruding portion 241 and the second protruding portion 242 may overlap with the at least two support positions in the extension direction (axis AX direction).

[0069] According to the above configuration (5), the difference in vertical displacement between the internal structure 200 and the rotor 3 can be made smaller.

[0070] (6) In some embodiments, in any of the configurations (1) to (5) above, the compartment 2 (external compartment 201) may be divided into a compartment lower half 2L and a compartment upper half 2U at a horizontal dividing plane Sd. The protrusion 24 may be provided in the compartment upper half 2U.

[0071] According to the above configuration (6), since the support surface 27a can be easily brought close to the height position of the horizontal division surface Sd, it becomes easy to suppress the vertical displacement difference between the support surface 27a and the horizontal division surface Sd.

[0072] (7) In some embodiments, in the configuration of (6) above, the support portion (outer support portion 27) may have a support surface 27a that supports the protrusion 24 from below. The vertical height position of the support surface 27a may be substantially the same as the height position of the horizontal division surface Sd.

[0073] According to the above configuration (7), it becomes easier to suppress the vertical displacement difference between the support surface 27a and the horizontal dividing surface Sd.

[0074] (8) In some embodiments, any of the configurations (1) to (7) above may be provided with a heater 51 for heating the support portion (outer support portion 27) and a heater control device 53 for controlling the heater 51.

[0075] According to the configuration of (8) above, the height position of the support surface 27a that supports the protrusion 24 from below in the support part (outer support part 27) can be adjusted by controlling the temperature of the support part (outer support part 27) with the heater 51. This allows the height position of the internal object 200 to be controlled by controlling the temperature of the support part (outer support part 27) with the heater 51, so that the vertical displacement difference between the internal object 200 and the rotor 3 can be further reduced.

[0076] (9) In some embodiments, in any of the configurations (1) to (8) above, the casing 2 may be an external casing 201, and the internal components 200 may include an internal casing (internal casing 211, high-pressure turbine internal casing 221).

[0077] According to the above configuration (9), in a rotary machine (steam turbine 100) including an external casing 201 and an internal casing (internal casing 211, high-pressure turbine internal casing 221), the vertical displacement difference between the internal structure 200 and the rotor 3 can be reduced compared to the casing support structure of a conventional rotary machine.

[0078] (10) A rotary machine according to at least one embodiment of the present disclosure includes a rotary machine casing support structure 10 having any one of the configurations (1) to (9) described above, and a rotor 3.

[0079] According to the above configuration (10), the difference in vertical displacement between the built-in object 200 and the rotor 3 can be reduced compared to a rotary machine equipped with a conventional rotary machine casing support structure. This makes it difficult for axial vibration to occur due to contact with the seal fins, and improves performance by reducing the clearance between the rotating and stationary members. [Explanation of symbols]

[0080] 1 Rotation axis 2 Cabin 2U upper half of cabin 2L lower half of cabin 3 Rotor 10 Cabin support structure 24 Protrusion 25 Inner support part 27 Outer support part (support part) 27a Support surface 29 Turbine Mount 100 Steam Turbine 100HP High Pressure Turbine 100HIP high and intermediate pressure turbine 200 Internal organs 201 External compartment 203 Interior Space 211 Interior compartment 212 Wing ring 213 Dummy Ring 221 High pressure turbine internal casing 222 High Pressure Turbine Blade Ring 223 First Dummy Ring 232 Intermediate Pressure Turbine Blade Ring 241 1st protrusion 242 Second protrusion

Claims

1. a cabin having an upper half and a lower half; an internal structure disposed in an internal space of the casing at a side of the rotor and supported by the casing; A protruding portion protruding from a side portion of the vehicle compartment toward a lateral outer side of the vehicle compartment; a support portion that supports the protrusion at a lateral outer side of the vehicle compartment; Equipped with the casing lower half portion has an inner support portion formed to protrude toward a radially inner side of the rotor, The contents include an upper half of the contents and a lower half of the contents, The upper half of the built-in structure has a built-in protrusion that protrudes toward the outside in the radial direction of the rotor, The built-in object is supported by the inner support portion at the protrusion of the built-in object, The casing can be divided into a lower half and an upper half at a horizontal dividing plane, The protrusion is provided in the upper half of the vehicle compartment. A rotating machinery casing support structure.

2. The support portion has a support surface that supports the protrusion from below, The vertical height position of the support surface is substantially the same as the height position of the horizontal division surface. The rotary machine casing support structure according to claim 1 .

3. The protruding portion and the supporting portion are provided at positions overlapping the built-in object in the extending direction of the rotor. The rotary machine casing support structure according to claim 1 or 2.

4. The built-in object is supported by the casing at at least two support positions that are different in the extending direction of the rotor, the at least two support positions include a first support position located on one side in an extension direction of the rotor and a second support position located on the other side, the protrusion and the support are located between the first support position and the second support position in the extension direction of the rotor. The rotary machine casing support structure according to claim 3.

5. The protruding portion includes a first protruding portion and a second protruding portion spaced apart from the first protruding portion in an extension direction of the rotor, At least one of the first protruding portion and the second protruding portion overlaps with a support position where the casing supports the built-in object in an extending direction of the rotor. The rotary machine casing support structure according to claim 1 or 2.

6. The built-in object is supported by the casing at at least two support positions that are different in the extending direction of the rotor, the first protruding portion and the second protruding portion overlap with the at least two support positions in an extension direction of the rotor; The rotary machine casing support structure according to claim 5.

7. A heater for heating the support portion; A heater control device that controls the heater; Equipped with The rotary machine casing support structure according to claim 1 or 2.

8. The casing is an outer casing, The internal structure includes an internal compartment. The rotary machine casing support structure according to claim 1 or 2.

9. A casing support structure for a rotary machine according to claim 1 or 2; The rotor; A rotating machine comprising:

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