Soundproofing devices for ducts, and intake ducts for gas turbine compressors.
The sound insulation device in ducts, using dual sound-absorbing materials and fixed members with alternating connections, addresses the challenge of high noise generation in gas turbines by reducing noise and vibration transmission while maintaining intake volume.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- MITSUBISHI HEAVY IND LTD
- Filing Date
- 2024-11-26
- Publication Date
- 2026-06-05
AI Technical Summary
The increasing size of gas turbines leads to higher intake original noise generation, necessitating improved sound insulation performance in ducts to meet stricter noise standards and reduce noise transmission.
A sound insulation device is implemented in the ducts, comprising first and second sound-absorbing materials positioned on either side of the outer wall, fixed by a first fixing member and covered by plate-shaped members, with alternating connecting and non-connecting portions to reduce vibration transmission.
The solution effectively reduces noise and vibration transmission, enhances duct reinforcement, and maintains intake volume by securing the cross-sectional area of the air passage.
Smart Images
Figure 2026092291000001_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to a sound insulation device for a duct and an intake duct of a compressor of a gas turbine.
Background Art
[0002] There is a case where a duct configured such that a fluid flows through the inside thereof 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, the 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 meet the stricter standard values for noise due to environmental regulations and the like, and it is required to improve the sound insulation performance in the duct.
[0005] In view of the above circumstances, at least one embodiment of the present disclosure aims to provide a sound insulation device for a duct that can improve the sound insulation performance in the duct and an intake duct of a compressor of a gas turbine.
Means for Solving the Problems
[0006] (1) The sound insulation 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 second sound-absorbing material is disposed on the other side in the thickness direction relative to the outer wall member, A first fixing member extending in a direction perpendicular to the thickness direction for fixing the first sound-absorbing material to the outer wall member, The first sound-absorbing material is covered from one side by a first plate-shaped member fixed to the first fixing member, A second plate-shaped member covers the second sound-absorbing material from the other side and is fixed to the outer wall member via an axial member, Equipped with, The first fixing member is provided with alternating connecting portions along its extending direction, where the first fixing member is connected to the outer wall member and where it is not connected to the outer wall member.
[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 one side surface of the first plate-shaped member becomes the inner surface of 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. [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. [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 the 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 II-II arrow in FIG. 1 and shows the cross-section of the duct panel 20. FIG. 3 is a cross-sectional view taken along the III-III arrow in FIG. 2 and shows the cross-section of the duct panel 20. FIG. 4 is an enlarged view of part A in FIG. 2.
[0014] The soundproofing device 30 of the intake duct 15 according to one embodiment includes a first sound-absorbing material 31 (see FIG. 3) disposed on one side of the outer wall member 21 in the thickness direction Dt of the outer wall member 21, a second sound-absorbing material 32 disposed on the other side of the outer wall member 21 in the thickness direction Dt, a first fixing member 33 extending in a direction orthogonal to the thickness direction Dt for fixing the first sound-absorbing material 31 to the outer wall member 21, a first plate-like member 34 covering the first sound-absorbing material 31 from the above-mentioned one side and fixed to the first fixing member 33, and a second plate-like member 35 covering the second sound-absorbing material 32 from the above-mentioned other side and fixed to the outer wall member 21 via a shaft-like member 41. For the sake of convenience of explanation, the description of the first sound-absorbing material 31 is omitted in FIG. 2.
[0015] In the intake duct 15 according to one embodiment, the outer wall member 21 is a plate-like member that extends in a direction orthogonal to the thickness direction Dt of the outer wall member 21, that is, in a direction along the plane of the paper in FIG. 2 and in the depth direction of the plane of the paper, which is orthogonal to the thickness direction Dt. For the sake of convenience of explanation, the inner side in the radial direction Dr centered on the flow direction of the air AI (the extending direction of the intake duct 15) flowing through the air flow path 16 inside the intake duct 15 is one side of the thickness direction Dt of the outer wall member 21, and the outer side in the radial direction Dr is the other side of the thickness direction Dt. In the intake duct 15 according to one embodiment, in a cross section orthogonal to the flow direction of the air AI, the cross-sectional shape of the air flow path 16 is, for example, rectangular.
[0016] (Outer wall member 21 and reinforcing member 25) In the intake duct 15 according to one embodiment, a reinforcing member 25 that is attached to the outer wall member 21 on the other side in the thickness direction Dt with respect to the outer wall member 21 and extends in a direction orthogonal to the thickness direction Dt is attached to the outer wall member 21. In the example shown in FIG. 2, the reinforcing member 25 extends in the depth direction of the plane of the paper in FIG. 2, but may extend in a direction different from the depth direction of the plane of the paper in FIG. 2 as long as it is a direction orthogonal to the thickness direction Dt. In the example shown in FIG. 2, the cross-sectional shape of the reinforcing member 25 when viewed from the extending direction of the reinforcing member 25 is a C-shaped, but may be other shapes such as an L-shaped or a C-shaped. Only one reinforcing member 25 is shown in FIG. 2, but the number of reinforcing members 25 attached to the outer wall member 21 of one duct panel 20 may be plural. Also, the extending directions of the plurality of reinforcing members 25 may be the same or different.
[0017] (First fixing member 33) In the soundproofing device 30 according to one embodiment, the first fixing member 33 is attached to the outer wall member 21 on one side in the thickness direction Dt and extends in a direction orthogonal to the thickness direction Dt. In the example shown in Figure 2, the first fixing member 33 extends in a direction perpendicular to the thickness direction Dt along the plane of Figure 2. However, it may extend in a direction other than that perpendicular to the thickness direction Dt along the plane of Figure 2, as long as it is perpendicular to the thickness direction Dt. Although only one first fixing member 33 is shown in Figures 2 and 3, there may be multiple first fixing members 33 attached to the outer wall member 21 of a single duct panel 20. Furthermore, the extending directions of the multiple first fixing members 33 may be the same or different.
[0018] In one embodiment, the first fixing member 33 includes a plate-shaped first portion 331 that extends in the thickness direction Dt. In one embodiment, the first fixing member 33 may include, for example, a second portion 332 that protrudes from one end of the first portion 331 in the thickness direction Dt, one of the ends in the thickness direction Dt, in a direction perpendicular to both the extending direction of the first fixing member 33 (the depth direction in the plane of the paper in Figure 3) and the thickness direction Dt (the left-right direction in the plane of the paper in Figure 3), as shown in Figure 3. In the example shown in Figure 3, the second portion 332 protrudes only from one end of the first portion 331 in the thickness direction Dt to one side in the direction perpendicular to the thickness direction Dt (the left-right direction in Figure 3), but it may also protrude to the other side in the direction perpendicular to the thickness direction Dt (the right-right direction in Figure 3). In other words, the first fixing member 33 according to one embodiment may have an L-shaped or T-shaped cross-section when viewed from the extending direction of the first fixing member 33, as shown in Figure 3.
[0019] In the first fixing member 33 according to one embodiment, the first portion 331 is provided with alternating connecting portions 333, to which the first fixing member 33 (first portion 331) is connected to the outer wall member 21, and non-connecting portions 334, to which the first fixing member 33 (first portion 331) is not connected to the outer wall member 21, along the extending direction of the first fixing member 33 (the direction perpendicular to the thickness direction Dt along the plane of the paper in Figure 2, and the depth direction along the plane of the paper in Figure 3). In one embodiment, the first fixing member 33 is fixed at the connecting portion 333 to one side surface 21a of the outer wall member 21 in the thickness direction Dt, for example, by welding.
[0020] In the first fixing member 33 according to one embodiment, the connecting portion 333 is provided on the first fixing member 33 (first portion 331) at intervals along the extending direction of the first fixing member 33 (the direction perpendicular to the thickness direction Dt along the plane of the paper in Figure 2, and the depth direction of the paper in Figure 3), and is a plurality of protrusions 335 projecting toward the other side in the thickness direction Dt. The arrangement pitch of the connecting portions 333 along the extending direction of the first fixing member 33 may be uniform or uneven. Furthermore, the dimensions of the connecting portions 333 along the extending direction of the first fixing member 33 may be the same or different for each connecting portion 333. Furthermore, the dimensions of the protrusion 335, i.e., the connecting portion 333, and the first portion 331 located on one side of the connecting portion 333 in the thickness direction Dt, as shown in Figure 2 (the left-right direction of the paper in Figure 3), may be the same, or the connecting portion 333 may be smaller than the first portion 331 located on one side of the connecting portion 333 in the thickness direction Dt.
[0021] (First sound-absorbing material 31) In the soundproofing device 30 according to one embodiment, the first sound-absorbing material 31 is positioned on one side of the outer wall member 21 in the thickness direction Dt, as described above, and is fixed by the first fixing member 33. 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 33, and its movement in the thickness direction Dt is restricted by the first plate-shaped member 34 fixed to the first fixing member 33 and the outer wall member 21, as will be described later. 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 smaller 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.
[0022] (First plate-shaped member 34) In the soundproofing device 30 according to one embodiment, the first plate-shaped member 34 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. As is clearly shown in Figure 3, the first plate-shaped member 34 covers the first sound-absorbing material 31 from one side in the thickness direction Dt, as described above. The peripheral edge of the first plate-shaped member 34 is fixed to the second part 332 of the first fixing member 33, for example, by welding.
[0023] (Second sound-absorbing material 32) In the soundproofing device 30 according to one embodiment, the second sound-absorbing material 32 is positioned on the other side of the outer wall member 21 in the thickness direction Dt, as described above. The movement of the second sound-absorbing material 32 in the thickness direction Dt is restricted by the second plate-shaped member 35 (described later) and the outer wall member 21. Furthermore, the movement of the second sound-absorbing material 32 in a direction perpendicular to the thickness direction Dt is restricted by the reinforcing member 25 and the axial member 41 (described later).
[0024] (Second plate-shaped member 35) In the soundproofing device 30 according to one embodiment, the second plate-shaped member 35 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. As described above, the second plate-shaped member 35 covers the second sound-absorbing material 32 from the other side in the thickness direction Dt. The second plate-shaped member 35 is directly fixed to the exterior wall member 21 via the shaft-shaped member 41. Furthermore, the second plate-shaped member 35 is directly fixed to the exterior wall member 21 via the shaft-shaped member 41 and the reinforcing member 25.
[0025] Specifically, as shown in the right-hand region of Figure 2, for example, one end of the axial member 41, which is a 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 42 fixed by welding to the other end face 21b of the exterior wall member 21 in the thickness direction Dt, and another nut 43. Also, as shown in the left-hand region of Figure 2, for example, one end of the axial member 41, which is a 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 42 fixed by welding to the other end of the reinforcing member 25 in the thickness direction Dt, and another nut 43.
[0026] The second plate-shaped member 35 is fixed to the shaft-shaped member 41 via an elastic member by a nut 45 on the other side in the thickness direction Dt of the shaft-shaped member 41, which is directly or indirectly fixed to the outer wall member 21 as described above, on one side 35a in the thickness direction Dt and the other side 35b in the thickness direction Dt. Specifically, the second plate-shaped member 35 is sandwiched between a washer 44 made of an elastic member such as rubber that can absorb vibrations, on one side 35a in the thickness direction Dt and the other side 35b in the thickness direction Dt. The second plate-shaped member 35 is further sandwiched between a nut 45 positioned on one side in the thickness direction Dt relative to the washer 44 on one side in the thickness direction Dt, and a nut 45 positioned on the other side in the thickness direction Dt relative to the washer 44 on the other side in the thickness direction Dt, thereby being fixed to the shaft-shaped member 41 via an elastic member. Furthermore, it is preferable to place a metal washer 46 between the washer 44, which is made of an elastic material, and the nut 45.
[0027] The shaft-shaped member 41 may be a bolt with a head, rather than a stud bolt 41A as described above. If the shaft-shaped member 41 is a bolt with a head, it is preferable that the head of the bolt be fixed to the other end face 21b of the outer wall member 21 in the thickness direction Dt, for example, by welding.
[0028] In the soundproofing device 30 according to this embodiment, noise and vibration (hereinafter simply referred to as vibration, etc.) traveling from one side in the thickness direction Dt to the other is first transmitted to the first plate-shaped member 34 from the region on one side in the thickness direction Dt than the first plate-shaped member 34. If the soundproofing device 30 according to this embodiment is a soundproofing device 30 for an intake duct 15, vibration, etc. traveling from one side in the thickness direction Dt to the other is first transmitted to the first plate-shaped member 34 from the air passage 16.
[0029] Vibrations transmitted to the first plate-shaped member 34 are attenuated by the first sound-absorbing material 31 and then transmitted to the outer wall member 21. Furthermore, vibrations transmitted to the first plate-shaped member 34 are transmitted to the outer wall member 21 via the first fixing member 33. At that time, vibrations transmitted from the first fixing member 33 to the outer wall member 21 are transmitted to the outer wall member 21 from the connection portion 333 at the first portion 331 of the first fixing member 33. In the soundproofing device 30 according to one embodiment, since the connection portion 333 and the non-connection portion 334 are alternately provided at the first portion 331 of the first fixing member 33 along the extending direction of the first fixing member 33, the transmission of vibrations between the first fixing member 33 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.
[0030] In the soundproofing device 30 according to one embodiment, as described above, the connection portion 333 of the first fixing member 33 is provided on the first fixing member 33 (first portion 331) at intervals along the extending direction of the first fixing member 33, and consists of a plurality of protrusions 335 that project toward the other side in the thickness direction Dt. As a result, the transmission of vibrations and the like between the first fixing member 33 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 first fixing member 33 is fixed to the outer wall member 21 by a plurality of connecting parts 333 which are a plurality of protrusions 335 projecting toward the other side in the thickness direction Dt, so the possibility of the first fixing member 33 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 first fixing member 33 were to detach from the outer wall member 21, the first fixing member 33, the first plate-shaped member 34, the first sound-absorbing material 31, 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 first fixing member 33 detaching from the outer wall member 21 can be effectively reduced, thereby reducing the possibility of damage to the compressor 11.
[0031] In one embodiment of the soundproofing device 30, a reinforcing member 25 is provided that 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, thereby effectively reinforcing the outer wall member 21. For example, if the soundproofing device 30 according to one embodiment is a soundproofing device 30 for an intake duct 15, the intake duct 15 can be effectively reinforced by providing the reinforcing member 25. Furthermore, in one embodiment, when the soundproofing device 30 is a soundproofing device 30 for the intake duct 15, the reinforcing member 25 is attached to the other side of the outer wall member 21 in the thickness direction Dt, that is, to the outside in the radial direction Dr of the intake duct 15. Therefore, compared to the case where it is attached to the inside in the radial direction Dr of the intake duct 15, it becomes easier to secure the cross-sectional area of the air passage 16, and thus the impact on the intake volume can be reduced.
[0032] In the soundproofing device 30 according to one embodiment, the dimension of the first sound-absorbing material 31 in the thickness direction Dt (thickness t1) is smaller than the dimension of the second sound-absorbing material 32 in the thickness direction Dt (thickness t2), so the dimension from the outer wall member 21 to one side in the thickness direction Dt can be reduced. 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.
[0033] In one embodiment of the soundproofing device 30, the axial member 41 is preferably a bolt that penetrates the second plate-shaped member 35 in the thickness direction Dt. This bolt may be a stud bolt 41A as described above, or it may be a bolt with a head. The second plate-shaped member 35 is preferably fixed to the axial member 41 by a nut 45 via an elastic member on one side surface 35a and the other side surface 35b in the thickness direction Dt. This reduces vibrations and other signals transmitted from the outer wall member 21 to the second plate-shaped member 35 via the axial member 41.
[0034] As described above, according to the soundproofing device 30 of one embodiment, by providing a first sound-absorbing material 31 and a second sound-absorbing material 32 arranged on either side of the exterior wall member 21, noise and vibration transmitted in the thickness direction Dt of the exterior wall member 21 can be effectively reduced. Furthermore, according to the soundproofing device 30 of one embodiment, since the connecting portion 333 and the non-connecting portion 334 are alternately provided along the extending direction of the first fixing member 33, as described above, the transmission of vibrations, etc. between the first fixing member 33 and the outer wall member 21 is reduced, and vibrations, etc. transmitted in the thickness direction Dt of the outer wall member 21 can be effectively reduced.
[0035] 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-described embodiment such that one side surface 34a of the first plate-shaped member 34 in the thickness direction Dt becomes the inner surface of the intake duct 15 in the radial direction Dr. This effectively reduces the transmission of intake noise generated by the compressor 11 to the outside.
[0036] 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, although an example has been described in which the soundproofing device 30 according to the above embodiment is applied to the intake duct 15 of the compressor 11 of the gas turbine 10, the soundproofing device 30 according to the above embodiment may be applied to a location other than the intake duct 15 of the compressor 11 of the gas turbine 10. For example, the soundproofing device 30 according to the above embodiment may be applied to the exhaust duct of the turbine 13 of the gas turbine 10. Also, the soundproofing device 30 according to the above embodiment may be applied to an air conditioning duct, for example.
[0037] 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 disposed on one side of the outer wall member 21 of the duct (intake duct 15) in the thickness direction Dt; a second sound-absorbing material 32 disposed on the other side of the outer wall member 21 in the thickness direction Dt; a first fixing member 33 extending in a direction perpendicular to the thickness direction Dt for fixing the first sound-absorbing material 31 to the outer wall member 21; a first plate-shaped member 34 covering the first sound-absorbing material 31 from the one side and fixed to the first fixing member 33; and a second plate-shaped member 35 covering the second sound-absorbing material 32 from the other side and fixed to the outer wall member 21 via an axial member 41. The first fixing member 33 has connecting portions 333 to which the first fixing member 33 and the outer wall member 21 are connected, and non-connecting portions 334 to which the first fixing member 33 and the outer wall member 21 are not connected, which are alternately provided along the extending direction of the first fixing member 33.
[0038] According to the configuration of (1) above, by providing the first sound-absorbing material 31 and the second sound-absorbing material 32 arranged on either side of the exterior wall member 21, noise and vibration transmitted in the thickness direction Dt of the exterior wall member 21 can be effectively reduced. Furthermore, according to the configuration of (1) above, since the connecting portion 333 and the non-connecting portion 334 are alternately provided along the extending direction of the first fixing member 33, the transmission of noise and vibration between the first fixing member 33 and the exterior wall member 21 is reduced, thereby effectively reducing noise and vibration transmitted in the thickness direction Dt of the exterior wall member 21.
[0039] (2) In some embodiments, in the configuration of (1) above, the connecting portion 333 may be a plurality of protrusions 335 provided on the first fixing member 33 at intervals along the extending direction and projecting toward the other side.
[0040] According to the configuration described in (2) above, the transmission of noise and vibration between the first fixing member 33 and the outer wall member 21 is reduced by a relatively simple configuration, thereby effectively reducing the noise and vibration transmitted in the thickness direction Dt of the outer wall member 21.
[0041] (3) In some embodiments, the configuration of (1) or (2) above may include a reinforcing member 25 attached to the other side of the outer wall member 21 and extending in the direction perpendicular to the outer wall member 21.
[0042] According to the configuration described in (3) above, the exterior wall member 21 can be effectively reinforced.
[0043] (4) In some embodiments, in any of the configurations (1) to (3) above, the dimension of the first sound-absorbing material 31 in the thickness direction Dt (thickness t1) is smaller than the dimension of the second sound-absorbing material 32 in the thickness direction Dt (thickness t2).
[0044] According to the configuration of (4) above, the dimension from the outer wall member 21 to the one side can be reduced. Also, when the soundproofing device 30 of the configuration of (4) above has one side facing the inside of the duct, it becomes easier to secure the cross-sectional area of the fluid flow path inside the duct, thus reducing the impact on the flow rate of the fluid flowing inside the duct.
[0045] (5) In some embodiments, in any of the configurations (1) to (4) above, the shaft-shaped member 41 may be a bolt (stud bolt 41A) that penetrates the second plate-shaped member 35 in the thickness direction Dt. The second plate-shaped member 35 may be fixed to the shaft-shaped member 41 by a nut 45 via an elastic member (washer 44) on one side surface 35a and the other side surface 35b.
[0046] According to the configuration described in (5) above, noise and vibration transmitted from the exterior wall member 21 to the second plate-shaped member 35 via bolts (stud bolts 41A) can be reduced.
[0047] (6) 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 duct soundproofing device 30 having any of the configurations (1) to (5) above such that the surface 34a on one side of the first plate-shaped member 34 is the inner surface of the intake duct 15.
[0048] According to the configuration described in (6) above, the transmission of intake noise generated by the compressor 11 to the outside can be effectively reduced. [Explanation of symbols]
[0049] 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 First fixing member 34 First plate-shaped member 35 Second plate-shaped member 41 Axial member 44 Washers 333 Connection part 334 Disconnected section 335 Protrusion
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 second sound-absorbing material is disposed on the other side in the thickness direction relative to the outer wall member, A first fixing member extending in a direction perpendicular to the thickness direction for fixing the first sound-absorbing material to the outer wall member, The first sound-absorbing material is covered from one side by a first plate-shaped member fixed to the first fixing member, A second plate-shaped member covers the second sound-absorbing material from the other side and is fixed to the outer wall member via a shaft-shaped member, Equipped with, The first fixing member is provided with alternating connecting portions along its extending direction, where the first fixing member and the outer wall member are connected, and non-connecting portions where the first fixing member and the outer wall member are not connected. Soundproofing device for ducts.
2. The connecting portion is a plurality of protrusions provided on the first fixing member at intervals along the extending direction and projecting toward the other side. The soundproofing device for a duct according to claim 1.
3. A reinforcing member attached to the other side of the outer wall member and extending in the direction perpendicular to the said direction, Equipped with A soundproofing device for a duct according to claim 1 or 2.
4. The dimension of the first sound-absorbing material in the thickness direction is smaller than the dimension of the second sound-absorbing material in the thickness direction. A soundproofing device for a duct according to claim 1 or 2.
5. The axial member is a bolt that penetrates the second plate-shaped member in the thickness direction, The second plate-shaped member is fixed to the shaft-shaped member by nuts via elastic members on one side and the other side. A soundproofing device for a duct according to claim 1 or 2.
6. This is an intake duct for a gas turbine compressor, A duct formed by arranging the duct soundproofing device according to claim 1 or 2 such that the one side surface of the first plate-shaped member becomes the inner surface of the intake duct, Equipped with Intake duct for a gas turbine compressor.