Soundproofing devices for ducts, and intake ducts for gas turbine compressors.

Abstract

The present invention provides a soundproofing device for ducts that can improve the sound insulation performance of ducts, and an intake duct for a gas turbine compressor. [Solution] A soundproofing device for a duct according to at least one embodiment of the present disclosure comprises: a first sound-absorbing material disposed on one side of the outer wall member of the duct in the thickness direction of the outer wall member; a first fixing member for fixing the first sound-absorbing material to the outer wall member; a first plate-shaped member located on one side of the first sound-absorbing material with an air layer in between; a second fixing member for fixing the first plate-shaped member to the outer wall member; and a second sound-absorbing material located on one side of the first plate-shaped member.

Description

Technical Field

[0001] The present disclosure relates to a soundproofing device for a duct and an intake duct of a compressor of a gas turbine.

Background Art

[0002] There are cases where a duct configured such that a fluid flows through the inside is required to have a function of reducing noise and vibration from the upstream side or the downstream side of the fluid flow. Therefore, a sound-absorbing material may be provided in the duct (see, for example, Patent Document 1). The duct described in Patent Document 1 is an intake duct for guiding intake air to a compressor of a gas turbine, and by providing a sound-absorbing material in the intake duct, transmission of intake original noise generated in the compressor to the outside is reduced.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Due to the recent increase in the size of gas turbines, the intake original noise generated by the compressor tends to increase. In addition, it is necessary to comply with the stricter standard values for noise due to environmental regulations and the like, and it is required to improve the soundproofing performance in the duct.

[0005] In view of the above circumstances, at least one embodiment of the present disclosure aims to provide a soundproofing device for a duct that can improve the soundproofing performance in the duct and an intake duct of a compressor of a gas turbine.

Means for Solving the Problems

[0006] (1) The soundproofing device for a duct according to at least one embodiment of the present disclosure is A first sound-absorbing material is positioned on one side of the outer wall member of the duct in the thickness direction of the outer wall member, A first fixing member for fixing the first sound-absorbing material to the exterior wall member, A first plate-shaped member located on one side of the first sound-absorbing material with an air layer in between, A second fixing member for fixing the first plate-shaped member to the outer wall member, A second sound-absorbing material located on one side of the first plate-shaped member, It is equipped with.

[0007] (2) The intake duct of the compressor of a gas turbine according to at least one embodiment of the present disclosure is This is an intake duct for a gas turbine compressor, A duct is formed by arranging the soundproofing device for the duct according to the above configuration (1) such that the other side surface of the first plate-shaped member faces inward into the intake duct. It is equipped with. [Effects of the Invention]

[0008] According to at least one embodiment of this disclosure, the sound insulation performance in a duct can be improved. [Brief explanation of the drawing]

[0009] [Figure 1] This is a schematic diagram showing the overall configuration of a gas turbine. [Figure 2] This is a cross-sectional view taken along the line II-II in Figure 1, showing the cross-section of the duct panel. [Figure 3] This is a cross-sectional view taken along the line III-III in Figure 2. [Figure 4] This is an enlarged view of section A in Figure 2. [Figure 5] This is a perspective view of the connecting member. [Figure 6] This is a diagram illustrating the third fixing member. [Figure 7] This is a cross-sectional view taken along the line VII-VII in Figure 6. [Modes for carrying out the invention]

[0010] Hereinafter, several embodiments of this disclosure will be described with reference to the attached drawings. However, the dimensions, materials, shapes, relative arrangements, etc., of the components described or shown in the drawings as embodiments are not intended to limit the scope of this disclosure, but are merely illustrative examples. For example, expressions describing relative or absolute arrangements such as "in a certain direction," "along a certain direction," "parallel," "orthogonal," "center," "concentric," or "coaxial" should not only strictly describe such arrangements, but also describe states of relative displacement with tolerances or angles or distances that allow for the same function to be achieved. For example, expressions such as "identical," "equal," and "homogeneous" that describe things being in an equal state not only describe a state of being strictly equal, but also describe a state in which there is a tolerance or a difference that is sufficient to achieve the same function. For example, expressions describing shapes such as squares or cylinders shall not only represent geometrically precise shapes such as squares or cylinders, but also shapes that include protrusions, chamfers, etc., to the extent that the same effect can be achieved. On the other hand, expressions such as "to possess," "to be equipped with," "to have," "to include," or "to have" a single component are not exclusive expressions that exclude the existence of other components.

[0011] Figure 1 is a schematic diagram showing the overall configuration of a gas turbine. In this embodiment, as shown in Figure 1, the gas turbine 10 is configured such that an intake duct 15, a compressor 11, a combustor 12, and a turbine 13 are arranged coaxially by a rotor 14, and a generator (not shown) is connected to one end of the rotor 14.

[0012] The compressor 11 generates high-temperature and high-pressure compressed air AC by compressing the air AI taken in from the air intake through the intake duct 15 as it passes through a plurality of stationary blades and rotating blades. The combustor 12 supplies a predetermined fuel FL to this compressed air AC and burns it to generate high-temperature and high-pressure combustion gas FG. The turbine 13 drives the rotor 14 to rotate by allowing the high-temperature and high-pressure combustion gas FG generated in the combustor 12, which is the working fluid, to pass through a plurality of stationary blades and rotating blades, and drives a generator (not shown) connected to this rotor 14.

[0013] The intake duct 15 according to one embodiment is formed by combining a plurality of flat duct panels 20 including an outer wall member 21 and a soundproofing device 30, which will be described later, provided on the outer wall member 21. FIG. 2 is a cross-sectional view taken along the arrow II-II in FIG. 1 and shows a cross-section of the duct panel 20. FIG. 3 is a cross-sectional view taken along the arrow III-III in FIG. 2. FIG. 4 is an enlarged view of part A in FIG. 2. FIG. 5 is a perspective view of the connecting member 61. FIG. 6 is a view showing a cross-section corresponding to the cross-sectional view taken along the arrow III-III in FIG. 2 for explaining the third fixing member 43 for fixing the third sound-absorbing material 33 to the outer wall member 21. FIG. 7 is a cross-sectional view taken along the arrow VII-VII in FIG. 6.

[0014] The soundproofing device 30 of the intake duct 15 according to one embodiment includes a first sound-absorbing material 31 disposed on one side in the thickness direction Dt of the outer wall member 21 with respect to the outer wall member 21, a first fixing member 41 for fixing the first sound-absorbing material 31 to the outer wall member 21, a first plate-like member 51 located on one side in the thickness direction Dt with respect to the first sound-absorbing material 31 across the air layer 35, a second fixing member 42 for fixing the first plate-like member 51 to the outer wall member 21, and a second sound-absorbing material 32 located on one side in the thickness direction Dt with respect to the first plate-like member 51. Furthermore, the soundproofing device 30 for the intake duct 15 according to one embodiment may include a second plate-shaped member 52 that covers the second sound-absorbing material 32 from one side in the thickness direction Dt, and a connecting member 61 that is disposed between the first plate-shaped member 51 and the second plate-shaped member 52 to connect the first plate-shaped member 51 and the second plate-shaped member 52. In one embodiment, the soundproofing device 30 of the intake duct 15 may include a sound-insulating sheet 36 attached to the other side of the second plate-shaped member 52 in the thickness direction Dt.

[0015] In one embodiment, the soundproofing device 30 for the intake duct 15 may include: a third sound-absorbing material 33 positioned on the other side of the outer wall member 21 in the thickness direction Dt; a third fixing member 43 extending in a direction perpendicular to the thickness direction Dt for fixing the third sound-absorbing material 33 to the outer wall member 21; and a third plate-shaped member 53 covering the third sound-absorbing material 33 from the other side in the thickness direction Dt and fixed to the third fixing member 43. For the sake of clarity, the third sound-absorbing material 33 is omitted from Figure 6.

[0016] (Exterior wall member 21 and reinforcing member 25) In one embodiment of the intake duct 15, the outer wall member 21 is a plate-shaped member that extends in a direction perpendicular to the thickness direction Dt of the outer wall member 21, that is, in a direction perpendicular to the thickness direction Dt and in the depth direction of the paper along the plane of the paper in Figure 2. For the sake of explanation, the outside of the radial direction Dr, centered on the flow direction of the air AI flowing through the air passage 16 inside the intake duct 15 (the extending direction of the intake duct 15), is considered one side of the thickness direction Dt of the outer wall member 21, and the inside of the radial direction Dr is considered the other side of the thickness direction Dt. In one embodiment of the intake duct 15, the cross-sectional shape of the air passage 16 is, for example, rectangular in a cross-section perpendicular to the flow direction of the air AI.

[0017] In one embodiment of the intake duct 15, a reinforcing member 25 is attached to the outer wall member 21, which is attached to one side surface 21a in the thickness direction Dt relative to the outer wall member 21 and extends in a direction perpendicular to the thickness direction Dt. This allows for effective reinforcement of the exterior wall member 21.

[0018] In the example shown in Figure 2, the reinforcing member 25 extends in the depth direction of the paper in Figure 2, but it may extend in a direction other than the depth direction of the paper in Figure 2, as long as it is perpendicular to the thickness direction Dt. In the example shown in Figure 2, the cross-sectional shape of the reinforcing member 25 when viewed from the direction of extension of the reinforcing member 25 is C-shaped, but it may also be other shapes such as L-shaped or C-shaped. Although only one reinforcing member 25 is shown in Figure 2, there may be multiple reinforcing members 25 attached to the outer wall member 21 of a single duct panel 20. Furthermore, the extending directions of the multiple reinforcing members 25 may be the same or different.

[0019] (First fixing member 41) In one embodiment of the soundproofing device 30, the first fixing member 41 is a member for fixing the first sound-absorbing material 31 to the exterior wall member 21, and is, for example, a plurality of stud bolts 41A extending in the thickness direction Dt. For example, as shown in the right-hand region of Figure 2, the other end of the stud bolt 41A in the thickness direction Dt is fixed to the exterior wall member 21 by a double fastening using a so-called double nut, consisting of a nut 71 fixed, for example, by welding to one side surface 21a of the exterior wall member 21 in the thickness direction Dt, and another nut 72. One end of the stud bolt 41A in the thickness direction Dt protrudes from one side of the first sound-absorbing material 31 (described later) on one side of the thickness direction Dt, from the surface 21a in the thickness direction Dt. In other words, the first fixing member 41 penetrates the first sound-absorbing material 31 in the thickness direction Dt, and restricts the movement of the first sound-absorbing material 31 in a direction perpendicular to the thickness direction Dt.

[0020] The tip 41Aa on one side in the thickness direction Dt of the stud bolt 41A is located on the other side in the thickness direction Dt of the first plate-like member 51, which will be described later. In other words, the stud bolt 41A is not in contact with the first plate-like member 51, which will be described later, and its tip 41Aa is located in the air layer 35, which will be described later. Therefore, in the soundproofing device 30 according to one embodiment, vibration energy is less likely to be transmitted between the first fixing member 41 and the first plate-shaped member 51, which will be described later.

[0021] The first fixing member 41 may be a bolt with a head, rather than a stud bolt 41A as described above. If the first fixing member 41 is a bolt with a head, it is preferable that the head of the bolt be fixed to one side surface 21a in the thickness direction Dt of the outer wall member 21, for example, by welding.

[0022] (First sound-absorbing material 31) In the soundproofing device 30 according to one embodiment, the first sound-absorbing material 31 is a sound-absorbing material positioned adjacent to the outer wall member 21 on one side in the thickness direction Dt, as described above. The first sound-absorbing material 31 is fixed to the first fixing member 41, as described above. That is, the movement of the first sound-absorbing material 31 in a direction perpendicular to the thickness direction Dt is restricted by the first fixing member 41. The movement of the first sound-absorbing material 31 in the other direction of thickness Dt is restricted by the outer wall member 21 located on the other side of the thickness direction Dt relative to the first sound-absorbing material 31.

[0023] Furthermore, the movement of the first sound-absorbing material 31 to one side in the thickness direction Dt is restricted by a wire 45 located on one side of the first sound-absorbing material 31 in the thickness direction Dt. Specifically, as shown in Figure 2, the wire 45 is in contact with one side surface 31a of the first sound-absorbing material 31 in the thickness direction Dt, and is fixed to a plurality of stud bolts 41A that are spaced apart in a direction intersecting the thickness direction Dt. The wire 45 is fixed to one end of the stud bolt 41A in the thickness direction Dt by being wrapped around the outer circumference of the stud bolt 41A, for example, as shown in Figure 3.

[0024] The dimension Dt in the thickness direction of the first sound-absorbing material 31, i.e., the thickness t1 of the first sound-absorbing material 31, is greater than the dimension Dt in the thickness direction of the second sound-absorbing material 32, i.e., the thickness t2 of the second sound-absorbing material 32, which will be described later. As a result, the thickness t2 of the second sound-absorbing material 32, which is positioned further away from the exterior wall member 21 than the first sound-absorbing material 31, is thinner than the thickness t1 of the first sound-absorbing material 31. This reduces the weight of the structure used to fix the second sound-absorbing material 32 to the exterior wall member 21, thereby reducing the weight of the soundproofing device 30. The structure for fixing the second sound-absorbing material 32 to the exterior wall member 21 includes the second fixing member 42, the first plate-shaped member 51, the connecting member 61, and the second plate-shaped member 52, which will be described later. By reducing the thickness t2 of the second sound-absorbing material 32, the bending strength of the stud bolts 41B included in the second fixing member 42, as described later, can be reduced, and the weight of the stud bolts 41B can be reduced.

[0025] The thickness t1 of the first sound-absorbing material 31 is greater than the dimension Dt in the thickness direction of the third sound-absorbing material 33, which will be described later, i.e., the thickness t3 of the third sound-absorbing material 33. This effectively reduces noise and vibration transmitted in the thickness direction Dt via the soundproofing device 30, while also reducing the dimension from the outer wall member 21 to the other side in the thickness direction Dt. For example, if the soundproofing device 30 according to one embodiment is a soundproofing device 30 for an intake duct 15, the dimension from the outer wall member 21 to the inside of the intake duct 15 in the radial direction Dr can be reduced, making it easier to secure the cross-sectional area of ​​the air passage 16, and thus reducing the impact on the intake volume.

[0026] (Air layer 35) In one embodiment of the soundproofing device 30, the air layer 35 is a void provided between one side surface 31a of the first sound-absorbing material 31 in the thickness direction Dt and the first plate-shaped member 51, which will be described later. That is, the first sound-absorbing material 31 and the first plate-shaped member 51, which will be described later, are spaced apart in the thickness direction Dt.

[0027] (First plate-shaped member 51) In the soundproofing device 30 according to one embodiment, the first plate-shaped member 51 is a plate-shaped member that extends in a direction perpendicular to the thickness direction Dt, that is, along the plane of the paper in Figure 2, in a direction perpendicular to the thickness direction Dt and in the depth direction of the paper. The first plate-shaped member 51 is fixed to the outer wall member 21 by a second fixing member 42, which will be described later, at a position spaced apart on one side of the thickness direction Dt from one side surface 31a of the first sound-absorbing material 31 in the thickness direction Dt.

[0028] (Second fixing member 42) In the soundproofing device 30 according to one embodiment, the second fixing member 42 is a member for fixing the first plate-shaped member 51 to the outer wall member 21 as described above, and includes a plurality of stud bolts 41B extending in the thickness direction Dt and the reinforcing member 25 described above. The reinforcing member 25 has its other end 25b in the thickness direction Dt attached to the outer wall member 21 on one side surface 21a in the thickness direction Dt, as described above. The other end of the stud bolt 41B in the thickness direction Dt is attached to the one end 25a of the reinforcing member 25 in the thickness direction Dt. Specifically, the other end of the stud bolt 41B in the thickness direction Dt is fixed to the one end 25a of the reinforcing member 25 by a double fastening using a so-called double nut, consisting of a nut 71 fixed to the one end 25a of the reinforcing member 25 by welding, for example, and another nut 72. This allows the length Dt in the thickness direction of the stud bolt 41B to be made relatively short, and the weight of the stud bolt 41B can be reduced, thus reducing the weight of the soundproofing device 30.

[0029] The first plate-shaped member 51 is fixed to the stud bolt 41B, which is fixed to the outer wall member 21 via a reinforcing member 25 as described above, on one side in the thickness direction Dt of the stud bolt 41B, by a nut 75 via an elastic member on one side surface 51a in the thickness direction Dt and the other side surface 51b in the thickness direction Dt. Specifically, the first plate-shaped member 51 is sandwiched between a washer 74 made of an elastic member such as rubber that can absorb vibrations, on one side surface 51a in the thickness direction Dt and the other side surface 51b in the thickness direction Dt. The first plate-shaped member 51 is further sandwiched between a nut 75 positioned on one side in the thickness direction Dt relative to the washer 74 on one side in the thickness direction Dt, and a nut 75 positioned on the other side in the thickness direction Dt relative to the washer 74 on the other side in the thickness direction Dt, thereby being fixed to the stud bolt 41B via an elastic member. This reduces the vibration energy transmitted between the stud bolt 41B and the first plate-shaped member 51. Furthermore, it is preferable to place a metal washer 76 between the washer 74, which is made of an elastic material, and the nut 75.

[0030] The stud bolt 41B of the second fixing member 42 may be a bolt having a head. In this case, the head of the bolt may be fixed to one end 25a of the reinforcing member 25, for example, by welding.

[0031] The tip 41Ba on one side of the stud bolt 41B in the thickness direction Dt is preferably positioned spaced apart from the second plate-shaped member 52 on the other side in the thickness direction Dt. This reduces the vibration energy transmitted between the second fixing member 42 and the second plate-shaped member 52.

[0032] (Second sound-absorbing material 32) In one embodiment of the soundproofing device 30, the second sound-absorbing material 32 is a sound-absorbing material positioned adjacent to the first plate-shaped member 51 on one side in the thickness direction Dt. The movement of the second sound-absorbing material 32 to the other side in the thickness direction Dt is restricted by the first plate-shaped member 51, and its movement to one side in the thickness direction Dt is restricted by the second plate-shaped member 52, which will be described later. The movement of the second sound-absorbing material 32 in a direction perpendicular to the thickness direction Dt is restricted by a connecting member 61, which will be described later.

[0033] (Connecting member 61) In a soundproofing device 30 according to one embodiment, the connecting member 61 is a plurality of members for connecting a first plate-shaped member 51 and a second plate-shaped member 52, which will be described later, which is spaced apart from the first plate-shaped member 51 on one side in the thickness direction Dt. As shown in Figure 5, the connecting member 61 is a plate member bent into a Z shape and includes a first portion 611 extending along one side surface 51a in the thickness direction Dt of the first plate-shaped member 51, a second portion 612 extending along the other side surface 52b in the thickness direction Dt of the second plate-shaped member 52, and a third portion 613 extending in the thickness direction Dt between the first portion 611 and the second portion 612.

[0034] For example, the connecting member 61 has a through hole 611a that penetrates the first portion 611 in the thickness direction Dt, and a through hole 612a that penetrates the second portion 612 in the thickness direction Dt. The connecting member 61 is joined to the first part 611 and the first plate-shaped member 51 by rivets 78 or screw parts inserted through the through hole 611a, and to the second part 612 and the second plate-shaped member 52 by rivets 78 or screw parts inserted through the through hole 612a. This allows the first plate-shaped member 51 and the second plate-shaped member 52 to be connected to the connecting member 61 with a relatively simple configuration. Furthermore, as described above, the connecting member 61 also plays a role in restricting the movement of the second sound-absorbing material 32 in a direction perpendicular to the thickness direction Dt.

[0035] In the soundproofing device 30 according to one embodiment, the number of connecting members 61 is preferably 10 or less per square meter of the first plate-shaped member 51, preferably 6 or less per square meter, and more preferably 3 or less per square meter. As will be described later, the connecting member 61 can serve as a transmission path for vibration energy between the first plate-shaped member 51 and the second plate-shaped member 52. Therefore, by arranging the connecting members 61 as described above, the number of vibration energy transmission paths between the first plate-shaped member 51 and the second plate-shaped member 52 can be relatively reduced, thereby reducing vibrations transmitted between the first plate-shaped member 51 and the second plate-shaped member 52.

[0036] (Second plate-shaped member 52 and sound insulation sheet 36) In the soundproofing device 30 according to one embodiment, the second plate-shaped member 52 is a plate-shaped member that extends in a direction perpendicular to the thickness direction Dt, that is, in a direction perpendicular to the thickness direction Dt and in the depth direction of the paper along the plane of the paper in Figure 2, and as described above, is positioned spaced apart from the first plate-shaped member 51 on one side in the thickness direction Dt, and covers the second sound-absorbing material 32 from one side in the thickness direction Dt. The second plate-shaped member 52 is fixed to the first plate-shaped member 51 via the connecting member 61 as described above.

[0037] In one embodiment of the soundproofing device 30, a sound-insulating sheet 36 may be attached to the other side surface 52b of the second plate-shaped member 52 in the thickness direction Dt. The sound-insulating sheet 36 is, for example, a flexible rubber sheet, and may contain metal powder or the like to increase the weight per unit volume.

[0038] As a result, the second plate-shaped member 52 becomes less prone to vibration, thus reducing the noise generated by the vibration of the second plate-shaped member 52. Furthermore, by attaching the sound-insulating sheet 36, the second plate-shaped member 52 becomes less prone to vibration, thus reducing the vibration energy transmitted from the second plate-shaped member 52 to the other side in the thickness direction Dt.

[0039] (3rd sound-absorbing material 33) In the soundproofing device 30 according to one embodiment, as shown in Figures 2 and 7, the third sound-absorbing material 33 is a sound-absorbing material positioned adjacent to the outer wall member 21 on the other side in the thickness direction Dt, as described above. The movement of the third sound-absorbing material 33 to one side in the thickness direction Dt is restricted by the outer wall member 21, and its movement to the other side in the thickness direction Dt is restricted by the third plate-shaped member 53 fixed to the third fixing member 43, as will be described later. The movement of the third sound-absorbing material 33 in a direction perpendicular to the thickness direction Dt is restricted by the third plate-shaped member 53, which will be described later.

[0040] (Third fixing member 43) In the soundproofing device 30 according to one embodiment, as shown in Figures 6 and 7, the third fixing member 43 is attached to the other side of the outer wall member 21 in the thickness direction Dt and extends in a direction perpendicular to the thickness direction Dt. In the example shown in Figure 6, the third fixing member 43 extends in the left-right direction of the paper in Figure 6, but it may extend in a direction other than the left-right direction of the paper in Figure 6, as long as it is perpendicular to the thickness direction Dt. Although only one third fixing member 43 is shown in Figures 6 and 7, there may be multiple third fixing members 43 attached to the outer wall member 21 of a single duct panel 20. Furthermore, the extending directions of each of the multiple third fixing members 43 may be the same or different.

[0041] In one embodiment of the soundproofing device 30, the third fixing member 43 includes a plate-shaped first portion 431 that extends in the thickness direction Dt. The third fixing member 43 may include, for example, a second portion 432 that protrudes from the other end of the first portion 431 in the thickness direction Dt, one of the two ends in the thickness direction Dt, in a direction perpendicular to both the extending direction of the third fixing member 43 (the depth direction in the plane of the paper in Figure 7) and the thickness direction Dt (the left-right direction in the plane of the paper in Figure 7), as shown in Figure 7. In the example shown in Figure 7, the second portion 432 protrudes only from the other end of the first portion 431 in the thickness direction Dt to one side (the left side of the paper in Figure 7) in a direction perpendicular to the thickness direction Dt (the left-right direction of the paper in Figure 7). However, it may also protrude to the other side (the right side of the paper in Figure 7) in a direction perpendicular to the thickness direction Dt (the left-right direction of the paper in Figure 7). That is, the cross-sectional shape of the third fixing member 43 when viewed from the extending direction of the third fixing member 43 may be L-shaped or T-shaped as shown in Figure 7.

[0042] In the soundproofing device 30 according to one embodiment, the third fixing member 43 has a first portion 431 which is alternately provided along the extending direction of the third fixing member 43 (left-right direction in Figure 6, depth direction in Figure 7). This includes a connecting portion 433 to which the third fixing member 43 (first portion 431) is connected to the outer wall member 21, and a non-connecting portion 434 to which the third fixing member 43 (first portion 431) is not connected to the outer wall member 21. The third fixing member 43 is fixed at the connection portion 433 to the other side surface 21b of the outer wall member 21 in the thickness direction Dt, for example, by welding.

[0043] In one embodiment of the soundproofing device 30, the connection portion 433 of the third fixing member 43 is provided on the third fixing member 43 (first portion 431) at intervals along the extending direction of the third fixing member 43 (left-right direction in Figure 6, depth direction in Figure 7), and consists of a plurality of protrusions 435 projecting toward one side in the thickness direction Dt. Furthermore, the dimensions of the protrusion 435, i.e., the connecting portion 433, and the first portion 431 on the other side of the connecting portion 433 in the thickness direction Dt, as shown in Figure 6 (the left-right direction of the paper in Figure 7), may be the same, or the connecting portion 433 may be smaller than the first portion 431 on the other side of the connecting portion 433 in the thickness direction Dt.

[0044] (Third plate-shaped member 53) In the soundproofing device 30 according to one embodiment, the third plate-shaped member 53 is a plate-shaped member that extends in a direction perpendicular to the thickness direction Dt, that is, in the left-right direction and the depth direction of the paper in Figure 6. As shown in Figure 7, the third plate-shaped member 53 covers the third sound-absorbing material 33 from the other side in the thickness direction Dt, as described above. The peripheral edge of the third plate-shaped member 53 is fixed to the second part 432 of the third fixing member 43, for example, by welding.

[0045] (Regarding the transmission paths of noise and vibration) In the soundproofing device 30 according to this embodiment, noise and vibration are reduced as they are transmitted in the thickness direction Dt as described below. The following description will focus on the case where noise and vibration are transmitted from one side to the other in the thickness direction Dt, but the same applies when noise and vibration are transmitted from one side to the other in the thickness direction Dt, so a detailed explanation will be omitted. In one embodiment of the soundproofing device 30, noise and vibrations (hereinafter simply referred to as vibrations, etc.) traveling from one side to the other in the thickness direction Dt are first transmitted to the third plate-shaped member 53 from the region on the other side in the thickness direction Dt. If the soundproofing device 30 in one embodiment is a soundproofing device 30 for an intake duct 15, vibrations, etc. traveling from one side to the other in the thickness direction Dt are first transmitted to the third plate-shaped member 53 from the air passage 16.

[0046] Vibrations transmitted to the third plate-shaped member 53 are attenuated by the third sound-absorbing material 33 and then transmitted to the outer wall member 21. Furthermore, vibrations transmitted to the third plate-shaped member 53 are transmitted to the outer wall member 21 via the third fixing member 43. At that time, vibrations transmitted from the third fixing member 43 to the outer wall member 21 are transmitted to the outer wall member 21 from the connection portion 433 at the first portion 431 of the third fixing member 43. In the soundproofing device 30 according to one embodiment, the connection portion 433 and the non-connection portion 434 are alternately provided at the first portion 431 of the third fixing member 43 along the extending direction of the third fixing member 43, so that the transmission of vibrations between the third fixing member 43 and the outer wall member 21 is reduced, and vibrations transmitted in the thickness direction Dt of the outer wall member 21 can be effectively reduced.

[0047] In the soundproofing device 30 according to one embodiment, as described above, the connection portion 433 of the third fixing member 43 is provided on the third fixing member 43 (first portion 431) at intervals along the extending direction of the third fixing member 43, and consists of a plurality of protrusions 435 that project toward one side in the thickness direction Dt. As a result, the transmission of vibrations and the like between the third fixing member 43 and the outer wall member 21 is reduced with a relatively simple configuration, and vibrations and the like transmitted in the thickness direction Dt of the outer wall member 21 can be effectively reduced. Furthermore, according to the soundproofing device 30 of one embodiment, the third fixing member 43 is fixed to the outer wall member 21 by a plurality of connecting parts 433 which are a plurality of protrusions 435 projecting toward one side in the thickness direction Dt, so the possibility of the third fixing member 43 detaching from the outer wall member 21 can be effectively reduced. For example, if the soundproofing device 30 according to one embodiment is a soundproofing device 30 for an intake duct 15, if the third fixing member 43 were to detach from the outer wall member 21, the third fixing member 43, the third plate-shaped member 53, the third sound-absorbing material 33, etc., would flow into the compressor 11, causing damage to the compressor 11. In this respect, according to the soundproofing device 30 of one embodiment, as described above, the possibility of the third fixing member 43 detaching from the outer wall member 21 can be effectively reduced, thereby reducing the possibility of damage to the compressor 11.

[0048] In the soundproofing device 30 according to one embodiment, vibrations and the like transmitted to the outer wall member 21 from the other side in the thickness direction Dt as described above are reduced by the first sound-absorbing material 31 and the air layer 35 in the process of being transmitted to the first plate-shaped member 51. As mentioned above, the stud bolt 41A is not in contact with the first plate-shaped member 51, and its tip 41Aa is located in the air layer 35, so vibrations and the like are less likely to be transmitted between the stud bolt 41A and the first plate-shaped member 51. Furthermore, as described above, the first plate-shaped member 51 is fixed to the stud bolt 41B with one surface 51a in the thickness direction Dt and the other surface 51b in the thickness direction Dt sandwiched between washers 74 made of elastic material. Therefore, vibrations transmitted from the outer wall member 21 to the first plate-shaped member 51 via the reinforcing member 25 and the stud bolt 41B are dampened and reduced by the washers 74 made of elastic material.

[0049] In the soundproofing device 30 according to one embodiment, vibrations and the like transmitted to the first plate-shaped member 51 from the other side in the thickness direction Dt, as described above, are reduced by the second sound-absorbing material 32 in the process of being transmitted to the second plate-shaped member 52. Furthermore, although the first plate-shaped member 51 and the second plate-shaped member 52 are connected by a connecting member 61, the transmission path of vibrations, etc., between the first plate-shaped member 51 and the second plate-shaped member 52 is relatively complex because the connecting member 61 is a plate-shaped member bent in a Z-shape. Therefore, vibrations, etc., transmitted from the first plate-shaped member 51 to the second plate-shaped member 52 can be reduced.

[0050] Thus, in the soundproofing device 30 according to one embodiment, by providing a first sound-absorbing material 31 and a second sound-absorbing material 32 positioned on one side of the first sound-absorbing material 31 in the thickness direction Dt with an air layer 35 in between, vibrations and the like transmitted through the soundproofing device 30 in the thickness direction Dt can be effectively reduced.

[0051] Furthermore, according to one embodiment of the intake duct 15, the intake duct 15 is formed by arranging the soundproofing device 30 according to the above embodiment such that the other side surface 51b of the first plate-shaped member 51 in the thickness direction Dt faces inward in the radial direction Dr of the intake duct 15. This effectively reduces the transmission of intake noise generated by the compressor 11 to the outside. In the intake duct 15 formed as described above, the other side surface 53b of the third plate-shaped member 53 in the thickness direction Dt becomes the inner surface of the intake duct 15 in the radial direction Dr and faces the air passage 16 inside the intake duct 15. In the intake duct 15 formed as described above, one side surface 52a of the second plate-shaped member 52 in the thickness direction Dt becomes the outer surface of the intake duct 15 in the radial direction Dr and faces the outside of the intake duct 15.

[0052] This disclosure is not limited to the embodiments described above, but also includes modified forms of the embodiments described above, as well as forms that combine these forms as appropriate. For example, in the soundproofing device 30 according to the above-described embodiment, the sound insulation sheet 36 is attached to the other side surface 52b of the second plate-shaped member 52 in the thickness direction Dt, but it may also be attached to a surface other than the other side surface 52b of the second plate-shaped member 52 in the thickness direction Dt. That is, the sound insulation sheet 36 may be attached not only to the other side surface 52b of the second plate-shaped member 52 in the thickness direction Dt, but also to at least one of the following surfaces: one side surface 51a of the first plate-shaped member 51 in the thickness direction Dt, the other side surface 51b of the first plate-shaped member 51 in the thickness direction Dt, one side surface 21a of the outer wall member 21 in the thickness direction Dt, the other side surface 21b of the outer wall member 21 in the thickness direction Dt, and one side surface 53a of the third plate-shaped member 53.

[0053] In the soundproofing device 30 according to the above embodiment, a vibration-damping steel plate may be used instead of the second plate-shaped member 52 to which the sound-insulating sheet 36 is attached. The vibration-damping steel plate is a member having a structure in which rubber, resin, or the like is sandwiched between two metal plates. In the soundproofing device 30 according to the above embodiment, vibration-damping steel plates may be used not only for the second plate-shaped member 52, but also for at least one of the first plate-shaped member 51, the outer wall member 21, and the third plate-shaped member 53.

[0054] The contents described in each of the above embodiments can be understood, for example, as follows: (1) A duct soundproofing device 30 according to at least one embodiment of the present disclosure comprises: a first sound-absorbing material 31 positioned on one side of the outer wall member 21 of the duct (intake duct 15) in the thickness direction Dt; a first fixing member 41 for fixing the first sound-absorbing material 31 to the outer wall member 21; a first plate-shaped member 51 positioned on one side of the first sound-absorbing material 31 in the thickness direction Dt, with an air layer 35 in between; a second fixing member 42 for fixing the first plate-shaped member 51 to the outer wall member 21; and a second sound-absorbing material 32 positioned on one side of the first plate-shaped member 51 in the thickness direction Dt.

[0055] According to the configuration described in (1) above, by providing a first sound-absorbing material 31 and a second sound-absorbing material 32 positioned on one side of the first sound-absorbing material 31 in the thickness direction Dt, with an air layer 35 in between, noise and vibration transmitted in the thickness direction Dt through the sound-insulating device 30 of the duct can be effectively reduced.

[0056] (2) In some embodiments, the configuration of (1) above may include a second plate-shaped member 52 that covers the second sound-absorbing material 32 from one side in the thickness direction Dt, and a connecting member 61 that is disposed between the first plate-shaped member 51 and the second plate-shaped member 52 to connect the first plate-shaped member 51 and the second plate-shaped member 52. The connecting member 61 is a plate-shaped member bent in a Z shape and may include a first portion 611 that extends along one side surface 51a in the thickness direction Dt of the first plate-shaped member 51, a second portion 612 that extends along the other side surface 52b in the thickness direction Dt of the second plate-shaped member 52, and a third portion 613 that extends in the thickness direction Dt between the first portion 611 and the second portion 612.

[0057] According to the configuration described in (2) above, the transmission path of vibration energy between the first plate-shaped member 51 and the second plate-shaped member 52 becomes relatively complex, so the vibration energy transmitted between the first plate-shaped member 51 and the second plate-shaped member 52 can be reduced.

[0058] (3) In some embodiments, in the configuration of (2) above, the first plate-shaped member 51 and the first part 611 may be joined by a screw part or rivet 78, and the second plate-shaped member 52 and the second part 612 may be joined by a screw part or rivet 78.

[0059] According to the configuration described in (3) above, the first plate-shaped member 51 and the second plate-shaped member 52 and the connecting member 61 can be joined with a relatively simple configuration.

[0060] (4) In some embodiments, in the configuration of (2) or (3) above, the number of connecting members 61 is preferably three or less per square meter of the first plate-shaped member 51.

[0061] According to the configuration described in (4) above, the transmission path of vibration energy between the first plate-shaped member 51 and the second plate-shaped member 52 can be relatively reduced, thereby reducing the vibration energy transmitted between the first plate-shaped member 51 and the second plate-shaped member 52.

[0062] (5) In some embodiments, the configuration of (2) to (4) above may include a sound-insulating sheet 36 attached to the other side surface 52b of the second plate-shaped member 52 in the thickness direction Dt.

[0063] According to the configuration of (5) above, by attaching the sound insulation sheet 36, the second plate-shaped member 52 becomes less prone to vibration, thus reducing the noise generated by the vibration of the second plate-shaped member 52. Furthermore, according to the configuration of (5) above, by attaching the sound insulation sheet 36, the second plate-shaped member 52 becomes less prone to vibration, thus reducing the vibration energy transmitted from the second plate-shaped member 52 to the other side in the thickness direction Dt.

[0064] (6) In some embodiments, in any of the configurations (2) to (5) above, the second fixing member 42 may include a bolt (stud bolt 41B) extending in the thickness direction Dt. The end (tip 41Ba) of the bolt (stud bolt 41B) on one side in the thickness direction Dt may be spaced apart from the second plate-like member 52 on the other side in the thickness direction Dt.

[0065] According to the configuration described in (6) above, the vibration energy transmitted between the second fixing member 42 and the second plate-shaped member 52 can be reduced.

[0066] (7) In some embodiments, the configuration of (1) to (6) above may include a reinforcing member 25 attached to one side of the outer wall member 21 in the thickness direction Dt and extending in a direction perpendicular to the thickness direction Dt.

[0067] According to the configuration described in (7) above, the exterior wall member 21 can be effectively reinforced.

[0068] (8) In some embodiments, in the configuration of (7) above, the second fixing member 42 may include a bolt (stud bolt 41B) extending in the thickness direction Dt and a reinforcing member 25. The other end of the bolt (stud bolt 41B) in the thickness direction Dt may be fixed to the reinforcing member 25.

[0069] According to the configuration described in (8) above, the length Dt in the thickness direction of the bolt (stud bolt 41B) can be made relatively short, and the weight of the bolt (stud bolt 41B) can be reduced, thus reducing the weight of the soundproofing device 30 for the duct.

[0070] (9) In some embodiments, in any of the configurations (1) to (8) above, the second fixing member 42 may include a bolt (stud bolt 41B) extending in the thickness direction Dt. The first plate-shaped member 51 may be fixed to the bolt (stud bolt 41B) by a nut 75 via an elastic member (washer 74) on one side surface 51a in the thickness direction Dt and the other side surface 51b in the thickness direction Dt.

[0071] According to the configuration described in (9) above, the vibration energy transmitted between the bolt (stud bolt 41B) and the first plate-shaped member 51 can be reduced.

[0072] (10) In some embodiments, in any of the configurations (1) to (9) above, the dimension in the thickness direction Dt (thickness t1) of the first sound-absorbing material 31 is larger than the dimension in the thickness direction Dt (thickness t2) of the second sound-absorbing material 32.

[0073] According to the configuration described in (10) above, the thickness t2 of the second sound-absorbing material 32, which is positioned further away from the exterior wall member 21 than the first sound-absorbing material 31, is thinner than the thickness t1 of the first sound-absorbing material 31. As a result, the weight of the structure for fixing the second sound-absorbing material 32 to the exterior wall member 21 can be reduced, and the weight of the duct soundproofing device 30 can be reduced.

[0074] (11) In some embodiments, the configuration of (1) to (10) above may include a third sound-absorbing material 33 positioned on the other side of the outer wall member 21 in the thickness direction Dt, a third fixing member 43 extending in a direction perpendicular to the thickness direction Dt for fixing the third sound-absorbing material 33 to the outer wall member 21, and a third plate-shaped member 53 covering the third sound-absorbing material 33 from the other side of the thickness direction Dt and fixed to the third fixing member 43. The third fixing member 43 may have connecting portions 433 to which the third fixing member 43 and the outer wall member 21 are connected, and non-connecting portions 434 to which the third fixing member 43 and the outer wall member 21 are not connected, alternately provided along the extending direction of the third fixing member 43.

[0075] According to the configuration of (11) above, by further providing the third sound-absorbing material 33, noise and vibration transmitted in the thickness direction Dt of the exterior wall member 21 can be effectively reduced. In addition, according to the configuration of (11) above, since the connecting portion 433 and the non-connecting portion 434 are alternately provided along the extending direction of the third fixing member 43, the transmission of noise and vibration between the third fixing member 43 and the exterior wall member 21 is reduced, and noise and vibration transmitted in the thickness direction Dt of the exterior wall member 21 can be effectively reduced.

[0076] (12) In some embodiments, in the configuration of (11) above, the dimension in the thickness direction Dt (thickness t1) of the first sound-absorbing material 31 may be greater than the dimension in the thickness direction Dt (thickness t3) of the third sound-absorbing material 33.

[0077] According to the configuration of (12) above, noise and vibration transmitted through the soundproofing device 30 of the duct in the thickness direction Dt can be effectively reduced, while the dimension from the outer wall member 21 to the other side in the thickness direction Dt can be reduced. Furthermore, if the other side of the soundproofing device 30 of the configuration of (12) above is on the inside of the duct, it becomes easier to secure the cross-sectional area of ​​the fluid flow path inside the duct, thereby reducing the impact on the flow rate of the fluid flowing inside the duct.

[0078] (13) An intake duct 15 of a compressor 11 of a gas turbine 10 according to at least one embodiment of the present disclosure comprises a duct (intake duct 15) formed by arranging a soundproofing device 30 for a duct having any of the configurations (1) to (12) above such that the other side surface 51b of the first plate-shaped member 51 in the thickness direction Dt faces inward into the intake duct 15.

[0079] According to the configuration described in (13) above, the transmission of intake noise generated by the compressor 11 to the outside can be effectively reduced. [Explanation of symbols]

[0080] 10 Gas Turbines 11 Compressor 15 Intake duct 20 duct panels 21 Exterior wall components 25 Reinforcement members 30 Soundproofing equipment 31. First sound-absorbing material 32. Second sound-absorbing material 33. Third sound-absorbing material 35 Air layer 36 Soundproofing Sheet 41 First fixing member 41A Stud bolt 41B Stud bolt 42 Second fixing member 43 Third fixing member 45 wires 51 First plate-shaped member 52 Second plate-shaped member 53 Third plate-shaped member 61 Connecting member 71, 72, 75 nuts 74 Washers 78 rivets 431 Part 1 432 Part 2 433 Connection part 434 Disconnected section 435 Protrusion 611 Part 1 612 Part 2 613 Part 3

Claims

1. A first sound-absorbing material is positioned on one side of the outer wall member of the duct in the thickness direction of the outer wall member, A first fixing member for fixing the first sound-absorbing material to the exterior wall member, A first plate-shaped member located on one side of the first sound-absorbing material with an air layer in between, A second fixing member for fixing the first plate-shaped member to the outer wall member, A second sound-absorbing material located on one side of the first plate-shaped member, Equipped with Soundproofing device for ducts.

2. A second plate-shaped member covers the second sound-absorbing material from one side, A connecting member is disposed between the first plate-shaped member and the second plate-shaped member to connect the first plate-shaped member and the second plate-shaped member, Equipped with, The connecting member is a Z-shaped bent plate member and includes a first portion extending along one side surface of the first plate-like member, a second portion extending along the other side surface in the thickness direction of the second plate-like member, and a third portion extending in the thickness direction between the first portion and the second portion. The soundproofing device for a duct according to claim 1.

3. The first plate-like member and the first part are joined by a screw component or a rivet. The second plate-shaped member and the second part are joined by a screw or rivet. The soundproofing device for a duct according to claim 2.

4. The number of connecting members arranged is three or less per square meter of the first plate-like member. The soundproofing device for a duct according to claim 2 or 3.

5. A sound-insulating sheet attached to the other side surface of the second plate-shaped member, Equipped with The soundproofing device for a duct according to claim 2 or 3.

6. The second fixing member includes a bolt extending in the thickness direction, The one end of the bolt is positioned spaced apart from the second plate-like member on the other side in the thickness direction. The soundproofing device for a duct according to claim 2 or 3.

7. A reinforcing member attached to one side of the outer wall member and extending in a direction perpendicular to the thickness direction, Equipped with A soundproofing device for a duct according to any one of claims 1 to 3.

8. The second fixing member includes a bolt extending in the thickness direction and the reinforcing member, The other end of the bolt in the thickness direction is fixed to the reinforcing member. The soundproofing device for a duct according to claim 7.

9. The second fixing member includes a bolt extending in the thickness direction, The first plate-shaped member is fixed to the bolt by a nut via an elastic member on one side and the other side in the thickness direction. A soundproofing device for a duct according to any one of claims 1 to 3.

10. The dimension of the first sound-absorbing material in the thickness direction is greater than the dimension of the second sound-absorbing material in the thickness direction. A soundproofing device for a duct according to any one of claims 1 to 3.

11. A third sound-absorbing material is disposed on the other side in the thickness direction relative to the outer wall member, A third fixing member extending in a direction perpendicular to the thickness direction, for fixing the third sound-absorbing material to the outer wall member, The third sound-absorbing material is covered from the other side by a third plate-shaped member fixed to the third fixing member, Equipped with, The third fixing member is provided with alternating connecting portions along its extending direction, where the third fixing member and the outer wall member are connected, and non-connecting portions where the third fixing member and the outer wall member are not connected. A soundproofing device for a duct according to any one of claims 1 to 3.

12. The dimension of the first sound-absorbing material in the thickness direction is greater than the dimension of the third sound-absorbing material in the thickness direction. The soundproofing device for a duct according to claim 11.

13. This is an intake duct for a gas turbine compressor, A duct formed by arranging the soundproofing device for a duct according to any one of claims 1 to 3 such that the other side of the first plate-shaped member in the thickness direction faces the inside of the intake duct, Equipped with Intake duct for a gas turbine compressor.

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