JP6685833B2 - Filters, intake ducts and gas turbines - Google Patents

Filters, intake ducts and gas turbines Download PDF

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JP6685833B2
JP6685833B2 JP2016101607A JP2016101607A JP6685833B2 JP 6685833 B2 JP6685833 B2 JP 6685833B2 JP 2016101607 A JP2016101607 A JP 2016101607A JP 2016101607 A JP2016101607 A JP 2016101607A JP 6685833 B2 JP6685833 B2 JP 6685833B2
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cord
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filter
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duct
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JP2017205735A (en
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貴也 甲田
貴也 甲田
敬介 松山
敬介 松山
智浩 後藤
智浩 後藤
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Mitsubishi Power Ltd
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Mitsubishi Hitachi Power Systems Ltd
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Description

本発明は、ダクト内に設けられるフィルタ、吸気ダクト及びガスタービンに関するものである。   The present invention relates to a filter provided in a duct, an intake duct, and a gas turbine.

従来、ガスタービンの空気圧縮機へ送気する空気通路に設置され、空気圧縮機に異物が混入することを防止するためのトラッシュスクリーンが知られている（例えば、特許文献１参照）。このトラッシュスクリーンは、金網等を用いて製作されている。   BACKGROUND ART Conventionally, there is known a trash screen that is installed in an air passage that supplies air to an air compressor of a gas turbine and that prevents foreign matter from entering the air compressor (see, for example, Patent Document 1). This trash screen is manufactured using a wire mesh or the like.

特開平８−２９６４５４号公報JP, 8-296454, A

ここで、空気通路等のダクト内に設けられるトラッシュスクリーン等のフィルタにおいて金網が用いられる場合、金網の縦方向の素線と横方向の素線とが交差する部分は、溶接により固定される場合がある。ダクト内に設けられるフィルタは、ダクト内を流通する流体が渦流を形成することにより、振動する場合がある。フィルタが振動すると、金網の交差部分における溶接部が疲労し易いものとなる。   Here, in the case where a wire mesh is used in a filter such as a trash screen provided in a duct such as an air passage, a portion where the vertical wire and the horizontal wire of the wire mesh intersect is fixed by welding. There is. The filter provided in the duct may vibrate due to the fluid flowing in the duct forming a vortex. When the filter vibrates, the welded portion at the intersecting portions of the wire mesh easily becomes fatigued.

そこで、本発明は、振動による負荷を抑制することができるフィルタ、吸気ダクト及びガスタービンを提供することを課題とする。   Therefore, an object of the present invention is to provide a filter, an intake duct, and a gas turbine that can suppress the load due to vibration.

本発明のフィルタは、ダクト内に設けられるフィルタにおいて、一方向に沿って延在して設けられると共に、複数並べて設けられる第１索状部材と、他方向に沿って延在して設けられると共に、複数並べて設けられ、前記第１索状部材に交差して設けられる第２索状部材と、を備え、前記第１索状部材が延在する一方向に直交する面で切った第１断面形状、及び前記第２索状部材が延在する他方向に直交する面で切った第２断面形状の少なくとも一方は、流線型形状であることを特徴とする。   The filter of the present invention is provided in a filter provided in a duct, extending along one direction, and provided with a plurality of first cord-shaped members arranged side by side and extending along another direction. A plurality of second cord-shaped members that are provided side by side and that intersect with the first cord-shaped member, the first cross section being cut along a plane orthogonal to one direction in which the first cord-shaped member extends. At least one of the shape and the second cross-sectional shape taken along a plane orthogonal to the other direction in which the second cord-like member extends is a streamlined shape.

この構成によれば、第１索状部材及び第２索状部材の少なくとも一方が、流線型形状となっているため、ダクト内を流通する流体に対して、第１索状部材及び第２索状部材の抗力を小さいものとすることができる。このため、流体による渦流の形成が抑制され、振動が低減されることにより、振動による負荷を抑制することができる。また、第１索状部材及び第２索状部材の抗力を小さくすることにより圧損を低減できることから、フィルタの下流側に圧縮機が設けられる場合には、圧縮機効率の向上を図ることができる。さらに、流線型形状となる各索状部材の流れ方向における長さが長くなることにより、流線型形状となる各索状部材の剛性が向上するため、異物がフィルタに衝突しても、損傷し難いものとなる。なお、複数の第１索状部材が延在する一方向と、複数の第２索状部材が延在する他方向とを、直交して設けることで、格子状に形成してもよい。   According to this configuration, since at least one of the first cord-shaped member and the second cord-shaped member has a streamlined shape, the first cord-shaped member and the second cord-shaped member are applied to the fluid flowing in the duct. The drag force of the member can be small. Therefore, the formation of the vortex flow by the fluid is suppressed and the vibration is reduced, so that the load due to the vibration can be suppressed. Further, since the pressure loss can be reduced by reducing the drag force of the first cord-shaped member and the second cord-shaped member, it is possible to improve the efficiency of the compressor when the compressor is provided on the downstream side of the filter. . Further, since the length of each streamlined cord-shaped member in the flow direction is increased, the rigidity of each streamlined cord-shaped member is improved, so that even if foreign matter collides with the filter, it is less likely to be damaged. Becomes Alternatively, one direction in which the plurality of first cord-shaped members extend and the other direction in which the plurality of second cord-shaped members extend may be orthogonal to each other to form a lattice shape.

また、前記第１断面形状が円形状であり、前記第２断面形状が流線型形状であることが好ましい。   Further, it is preferable that the first cross-sectional shape is circular and the second cross-sectional shape is streamlined.

この構成によれば、断面が流線型形状となる第２索状部材に対して、断面が円形状となる第１索状部材を容易に交差させて配置することができるため、製造コストの抑制を図ることができる。なお、第２索状部材は、ダクト内の流れ方向に対して、抗力が最も小さくなるように配置されることがよい。また、第２断面形状のダクト内の流れ方向に直交する方向を厚さ方向とすると、第１断面形状の直径と、第２断面形状の厚さ方向における厚さとは、同じ長さに形成してもよい。   According to this configuration, the first cord-shaped member having a circular cross-section can be easily arranged so as to intersect with the second cord-shaped member having a streamlined cross-section, thereby suppressing manufacturing cost. Can be planned. The second cord-shaped member is preferably arranged so that the drag force becomes the smallest with respect to the flow direction in the duct. When the direction orthogonal to the flow direction in the duct having the second cross-sectional shape is the thickness direction, the diameter of the first cross-sectional shape and the thickness of the second cross-sectional shape in the thickness direction are formed to have the same length. May be.

また、前記第１索状部材は、前記ダクト内の流れ方向において、前記第２索状部材の上流側に配置され、前記第１索状部材と前記第２索状部材との交差部分に形成される溶接部を、さらに備えることが好ましい。   Further, the first cord-shaped member is arranged on the upstream side of the second cord-shaped member in the flow direction in the duct, and is formed at the intersection of the first cord-shaped member and the second cord-shaped member. It is preferable to further include a welded part.

この構成によれば、第１索状部材と第２索状部材との交差部分を溶接により固定することができる。このとき、第２索状部材に比して抗力が大きい第１索状部材を上流側に配置することで、第１索状部材が第２索状部材側（下流側）に押し当てられ、これにより、第２索状部材により第１索状部材を支持することができる。   According to this configuration, the intersection of the first cord-shaped member and the second cord-shaped member can be fixed by welding. At this time, by arranging the first cord-shaped member having a larger drag force than the second cord-shaped member on the upstream side, the first cord-shaped member is pressed against the second cord-shaped member side (downstream side), Thereby, the first cord-shaped member can be supported by the second cord-shaped member.

また、前記第２断面形状の前記ダクト内の流れ方向に直交する方向を厚さ方向とすると、前記第２索状部材は、厚さ方向に貫通形成される貫通孔を有し、前記第１索状部材は、前記第２索状部材の前記貫通孔に挿通して設けられていることが好ましい。   Further, when a direction orthogonal to a flow direction in the duct having the second cross-sectional shape is a thickness direction, the second cord-shaped member has a through hole formed to penetrate in the thickness direction, The cord-shaped member is preferably provided by being inserted into the through hole of the second cord-shaped member.

この構成によれば、第２索状部材の貫通孔に第１索状部材を挿通して設けることで、第１索状部材と第２索状部材との交差部分を固定することができる。また、第１索状部材と第２索状部材とが振動する場合であっても、第１索状部材が貫通孔の内面に摺接することで、第１索状部材及び第２索状部材の振動を減衰させることができる。   According to this structure, the intersection of the first cord-shaped member and the second cord-shaped member can be fixed by inserting and providing the first cord-shaped member in the through hole of the second cord-shaped member. Even when the first cord-shaped member and the second cord-shaped member vibrate, the first cord-shaped member and the second cord-shaped member are brought into sliding contact with the inner surface of the through hole. The vibration of can be dampened.

また、前記貫通孔は、前記第２索状部材の厚さ方向において、最も厚くなる部位に形成されていることが好ましい。   Further, it is preferable that the through hole is formed at a portion that becomes thickest in the thickness direction of the second cord-shaped member.

この構成によれば、貫通孔の内面を大きくすることができ、第１索状部材と貫通孔との接触面積を大きくすることができるため、第１索状部材及び第２索状部材の振動を、より好適に減衰させることができる。   According to this configuration, the inner surface of the through hole can be increased, and the contact area between the first cord-shaped member and the through hole can be increased. Therefore, the vibration of the first cord-shaped member and the second cord-shaped member can be increased. Can be attenuated more preferably.

また、前記第１索状部材は、撚り線であることが好ましい。   Further, it is preferable that the first cord-shaped member is a stranded wire.

この構成によれば、第１索状部材が振動する場合、撚り線を構成する複数の素線間が摺接することで、第１索状部材の振動を減衰させることができる。   According to this configuration, when the first cord-shaped member vibrates, the vibrations of the first cord-shaped member can be damped by the sliding contact between the plurality of strands of the stranded wire.

本発明の吸気ダクトは、上記のフィルタを備えることを特徴とする。   An air intake duct of the present invention is characterized by including the above filter.

この構成によれば、フィルタの圧損を低減できることから、吸気ダクトの下流側に圧縮機が設けられる場合には、効率よく吸気を行うことができるため、圧縮機効率の向上を図ることができる。   According to this configuration, since the pressure loss of the filter can be reduced, when the compressor is provided on the downstream side of the intake duct, the intake can be efficiently performed, so that the efficiency of the compressor can be improved.

本発明のガスタービンは、上記の吸気ダクトを備えることを特徴とする。   A gas turbine according to the present invention is characterized by including the above-mentioned intake duct.

この構成によれば、吸気ダクトにおける吸気の効率がよくなるため、ガスタービンに設けられる圧縮機の圧縮機効率の向上を図ることができる。   According to this configuration, since the efficiency of intake air in the intake duct is improved, the compressor efficiency of the compressor provided in the gas turbine can be improved.

図１は、実施形態１に係るフィルタが設けられるダクトを模式的に示す断面図である。FIG. 1 is a cross-sectional view schematically showing a duct provided with a filter according to the first embodiment. 図２は、ダクト内の流れ方向から見たときのフィルタを模式的に示す正面図である。FIG. 2 is a front view schematically showing the filter as viewed from the flow direction in the duct. 図３は、図２のＡ−Ａ断面図である。FIG. 3 is a sectional view taken along line AA of FIG. 図４は、実施形態２に係るフィルタの断面図である。FIG. 4 is a cross-sectional view of the filter according to the second embodiment. 図５は、図４のＢ−Ｂ断面図である。FIG. 5 is a sectional view taken along line BB of FIG. 図６は、実施形態２のフィルタの第１索状部材の一例を示す説明図である。FIG. 6 is an explanatory diagram showing an example of the first cord-shaped member of the filter of the second embodiment. 図７は、実施形態３のフィルタの第１索状部材の一例を示す説明図である。FIG. 7 is an explanatory diagram showing an example of the first cord-shaped member of the filter of the third embodiment.

以下に、本発明に係る実施形態を図面に基づいて詳細に説明する。なお、この実施形態によりこの発明が限定されるものではない。また、下記実施形態における構成要素には、当業者が置換可能かつ容易なもの、あるいは実質的に同一のものが含まれる。さらに、以下に記載した構成要素は適宜組み合わせることが可能であり、また、実施形態が複数ある場合には、各実施形態を組み合わせることも可能である。   Embodiments according to the present invention will be described below in detail with reference to the drawings. The present invention is not limited to this embodiment. In addition, constituent elements in the following embodiments include elements that can be easily replaced by those skilled in the art, or substantially the same elements. Furthermore, the constituent elements described below can be combined as appropriate, and when there are a plurality of embodiments, the respective embodiments can be combined.

［実施形態１］
図１は、実施形態１に係るフィルタが設けられるダクトを模式的に示す断面図である。図２は、ダクト内の流れ方向から見たときのフィルタを模式的に示す正面図である。図３は、図２のＡ−Ａ断面図である。 [Embodiment 1]
FIG. 1 is a cross-sectional view schematically showing a duct provided with a filter according to the first embodiment. FIG. 2 is a front view schematically showing the filter as viewed from the flow direction in the duct. FIG. 3 is a sectional view taken along line AA of FIG.

本実施形態に係るフィルタ１０は、ダクト１内に設けられるフィルタであって、ダクト１としては、例えば、ガスタービンの圧縮機の吸込み口に接続される吸気ダクトである。このダクト１に設けられるフィルタ１０は、外部からの異物がガスタービンの内部に入り込まないように異物を捕集する、いわゆるラストチャンスフィルタ（ＬＣＦ：Last Chance Filter）となっている。   The filter 10 according to the present embodiment is a filter provided in the duct 1, and the duct 1 is, for example, an intake duct connected to a suction port of a compressor of a gas turbine. The filter 10 provided in the duct 1 is a so-called Last Chance Filter (LCF) that collects foreign matter so that the foreign matter does not enter the inside of the gas turbine.

図１に示すように、ダクト１は、その上流側の部位が水平方向に延在して設けられ、その下流側の部位が水平方向に対して下方側に向かって傾斜して設けられている。また、ダクト１は、下流側の部位の流路面積が、下流側に向かうにつれて小さくなっている。このダクト１は、その内部において空気が流通し、空気の流れ方向に直交する面で切った断面が矩形状となっている。   As shown in FIG. 1, the duct 1 is provided such that its upstream side portion extends horizontally and its downstream side portion is inclined downward with respect to the horizontal direction. . Further, in the duct 1, the flow passage area of the downstream side portion becomes smaller toward the downstream side. The duct 1 has air flowing therein, and has a rectangular cross section taken along a plane orthogonal to the air flow direction.

図１及び図２に示すように、フィルタ１０は、矩形状に形成されており、ダクト１の下流側の部位に設けられている。このフィルタ１０は、水平方向に対して斜めとなるダクト１に対して、鉛直方向に延在して設けられている。   As shown in FIGS. 1 and 2, the filter 10 is formed in a rectangular shape, and is provided at a site on the downstream side of the duct 1. The filter 10 is provided so as to extend in the vertical direction with respect to the duct 1 that is inclined with respect to the horizontal direction.

フィルタ１０は、水平方向及び鉛直方向に複数並べて一体に設けられることで、ダクト１内を覆う所定の大きさに形成されている。図２及び図３に示すように、各フィルタ１０は、方形枠状のフレーム１１と、フレーム１１の枠内において一方向に沿って延在して設けられる第１索状部材１２と、フレーム１１の枠内において他方向に沿って延在して設けられる第２索状部材１３と、を備えている。   The filter 10 is formed in a predetermined size so as to cover the inside of the duct 1 by arranging a plurality of filters in the horizontal direction and the vertical direction so as to be integrally provided. As shown in FIGS. 2 and 3, each filter 10 includes a frame 11 having a rectangular frame shape, a first cord-shaped member 12 extending in one direction in the frame 11 and the frame 11. And a second cord-shaped member 13 extending along the other direction in the frame.

フレーム１１は、鉄材を用いて形成され、水平方向に沿って平行に設けられる一対の上下辺と、鉛直方向に沿って平行に設けられる一対の左右辺とにより、方形の枠状に形成されている。   The frame 11 is formed of an iron material, and is formed in a rectangular frame shape by a pair of upper and lower sides provided in parallel along the horizontal direction and a pair of left and right sides provided in parallel along the vertical direction. There is.

第１索状部材１２は、水平方向に沿って設けられており、所定の間隔を空けて鉛直方向に複数並べて設けられている。第１索状部材１２は、例えば、ステンレス鋼を用いて形成され、水平方向に直交する面で切った断面形状（第１断面形状）が、円形状となっている。つまり、第１索状部材１２は、断面円形となる鋼線である。第１索状部材１２は、その両端部が、フレーム１１の一対の左右辺にそれぞれ接続されている。   The first cord-shaped members 12 are provided along the horizontal direction, and a plurality of the first cord-shaped members 12 are provided side by side in the vertical direction at a predetermined interval. The first cord-shaped member 12 is formed of, for example, stainless steel, and has a circular sectional shape (first sectional shape) taken along a plane orthogonal to the horizontal direction. That is, the first cord-shaped member 12 is a steel wire having a circular cross section. Both ends of the first cord-shaped member 12 are connected to the pair of left and right sides of the frame 11, respectively.

第２索状部材１３は、鉛直方向に沿って設けられており、所定の間隔を空けて水平方向に複数並べて設けられている。第２索状部材１３は、例えば、ステンレス鋼を用いて形成され、第１索状部材１２と同じ材料を用いて構成されている。図３に示すように、第２索状部材１３は、鉛直方向に直交する面で切った断面形状（第２断面形状）が、流線型形状となっている。具体的に、第２索状部材１３の断面形状は、翼型形状となっており、空気の流れ方向の上流側が前縁側となり、下流側が後縁側となっている。つまり、第２索状部材１３は、ダクト１内の空気の流れ方向に対して、抗力が最も小さくなるように配置されている。第２索状部材１３は、その両端部が、フレーム１１の一対の上下辺にそれぞれ接続されている。   The second cord-shaped members 13 are provided along the vertical direction, and a plurality of the second cord-shaped members 13 are arranged side by side in the horizontal direction at a predetermined interval. The second cord-shaped member 13 is made of, for example, stainless steel, and is made of the same material as the first cord-shaped member 12. As shown in FIG. 3, the second cord-shaped member 13 has a streamlined cross-sectional shape (second cross-sectional shape) taken along a plane orthogonal to the vertical direction. Specifically, the cross-sectional shape of the second cord-shaped member 13 is a wing shape, and the upstream side in the air flow direction is the leading edge side and the downstream side is the trailing edge side. That is, the second cord-shaped member 13 is arranged so that the drag force becomes the smallest with respect to the flow direction of the air in the duct 1. Both ends of the second cord-shaped member 13 are connected to a pair of upper and lower sides of the frame 11, respectively.

また、第１索状部材１２が水平方向に延在し、第２索状部材１３が鉛直方向に延在することから、第１索状部材１２と第２索状部材１３とは、直交して設けられることで格子状に形成されている。第１索状部材１２は、ダクト１内の空気の流れ方向において、第２索状部材１３の上流側に配置されている。そして、第１索状部材１２と第２索状部材１３とが交差する交差部分が溶接されることで溶接部が形成され、溶接部は、第１索状部材１２と第２索状部材１３とを固定している。   Since the first cord-shaped member 12 extends in the horizontal direction and the second cord-shaped member 13 extends in the vertical direction, the first cord-shaped member 12 and the second cord-shaped member 13 are orthogonal to each other. Are provided in a grid shape. The first cord-shaped member 12 is arranged on the upstream side of the second cord-shaped member 13 in the flow direction of air in the duct 1. Then, a welded portion is formed by welding an intersecting portion where the first cord-shaped member 12 and the second cord-shaped member 13 intersect, and the welded portion includes the first cord-shaped member 12 and the second cord-shaped member 13. And are fixed.

第２索状部材１３は、図３に示す断面において、空気の流れ方向に直交する方向を厚さ方向とすると、円形となる第１索状部材１２の断面形状における直径ｄ１と、翼型となる第２索状部材１３の断面形状における厚さｄ２とは、同じ長さに形成されている。また、直径ｄ１と厚さｄ２とを同じ長さとすると、第２索状部材１３は、空気の流れ方向における長さＬが、直径ｄ１よりも長くなる。   In the cross section shown in FIG. 3, the second cord-like member 13 has a diameter d1 in the cross-sectional shape of the first cord-like member 12 and a wing shape, where the thickness direction is the direction orthogonal to the air flow direction. The second cord-shaped member 13 is formed to have the same length as the thickness d2 in the cross-sectional shape. If the diameter d1 and the thickness d2 are the same, the length L of the second cord-shaped member 13 in the air flow direction is longer than the diameter d1.

以上のように、実施形態１によれば、第２索状部材１３が流線型形状となっているため、ダクト１内を流通する空気に対して、第２索状部材１３の抗力を小さいものとすることができる。このため、空気による渦流の形成が抑制され、第２索状部材１３の振動が低減されることにより、振動によるフィルタ１０への負荷を抑制することができる。また、第２索状部材１３の抗力を小さくすることにより圧損を低減できることから、フィルタ１０の下流側に圧縮機が設けられる場合には、圧縮機効率の向上を図ることができる。さらに、流線型形状となる第２索状部材１３の流れ方向における長さＬが、第１索状部材１２の直径ｄ１よりも長くなることにより、第１索状部材１２の剛性が向上するため、異物がフィルタ１０に衝突しても、損傷し難いものとなる。   As described above, according to the first embodiment, since the second cord-shaped member 13 has a streamlined shape, the drag force of the second cord-shaped member 13 against air flowing in the duct 1 is small. can do. Therefore, the formation of a vortex flow due to air is suppressed, and the vibration of the second cord-shaped member 13 is reduced, so that the load on the filter 10 due to the vibration can be suppressed. Further, since the pressure loss can be reduced by reducing the drag force of the second cord-shaped member 13, it is possible to improve the compressor efficiency when the compressor is provided on the downstream side of the filter 10. Furthermore, since the length L of the streamlined second cord-shaped member 13 in the flow direction is longer than the diameter d1 of the first cord-shaped member 12, the rigidity of the first cord-shaped member 12 is improved, Even if a foreign matter collides with the filter 10, it is less likely to be damaged.

また、実施形態１によれば、第１索状部材１２の断面形状を円形状とし、第２索状部材１３の断面形状を流線型形状とすることで、第２索状部材１３に対して、第１索状部材１２を容易に交差させて配置することができるため、フィルタ１０の製造コストの抑制を図ることができる。   Further, according to the first embodiment, by making the cross-sectional shape of the first cord-shaped member 12 circular and the cross-sectional shape of the second cord-shaped member 13 streamlined, with respect to the second cord-shaped member 13, Since the first cord-shaped members 12 can be easily arranged so as to cross each other, the manufacturing cost of the filter 10 can be suppressed.

また、実施形態１によれば、第１索状部材１２と第２索状部材１３との交差部分を溶接により固定することができる。このとき、第２索状部材１３に比して抗力が大きい第１索状部材１２を上流側に配置することで、第１索状部材１２が第２索状部材１３に押し当てられることから、第２索状部材１３により第１索状部材１２を流れ方向において支持することができる。   Further, according to the first embodiment, the intersection of the first cord-shaped member 12 and the second cord-shaped member 13 can be fixed by welding. At this time, the first cord-shaped member 12 is pressed against the second cord-shaped member 13 by disposing the first cord-shaped member 12 having a larger drag force than the second cord-shaped member 13 on the upstream side. The second cord-shaped member 13 can support the first cord-shaped member 12 in the flow direction.

なお、実施形態１では、第１索状部材１２の断面形状を円形状とし、第２索状部材１３の断面形状を流線型形状としたが、少なくとも一方の索状部材１２，１３の断面形状を流線型形状とすればよい。つまり、第１索状部材１２の断面形状を流線型形状とし、第２索状部材１３の断面形状を流線型形状としてもよいし、第１索状部材１２及び第２索状部材１３の断面形状を流線型形状としてもよい。   In the first embodiment, the cross-sectional shape of the first cord-shaped member 12 is circular and the cross-sectional shape of the second cord-shaped member 13 is streamlined, but at least one of the cord-shaped members 12 and 13 has a cross-sectional shape. It may have a streamlined shape. That is, the cross-sectional shape of the first cord-shaped member 12 may be streamlined and the cross-sectional shape of the second cord-shaped member 13 may be streamlined, or the cross-sectional shapes of the first cord-shaped member 12 and the second cord-shaped member 13 may be changed. It may have a streamlined shape.

［実施形態２］
次に、図４から図６を参照して、実施形態２に係るフィルタ２０について説明する。図４は、実施形態２に係るフィルタの断面図である。図５は、図４のＢ−Ｂ断面図である。図６は、実施形態２のフィルタの第１索状部材の一例を示す説明図である。なお、実施形態２では、実施形態１と重複した記載を避けるべく、異なる部分についてのみ説明し、同一の構成については、同一の符号を付して説明する。 [Embodiment 2]
Next, the filter 20 according to the second embodiment will be described with reference to FIGS. 4 to 6. FIG. 4 is a cross-sectional view of the filter according to the second embodiment. FIG. 5 is a sectional view taken along line BB of FIG. FIG. 6 is an explanatory diagram showing an example of the first cord-shaped member of the filter of the second embodiment. In addition, in the second embodiment, in order to avoid the duplicated description of the first embodiment, only different portions will be described, and the same configurations will be denoted by the same reference numerals.

実施形態２のフィルタ２０は、実施形態１と同様に、フレーム１１と、第１索状部材１２と、第２索状部材１３とを備えている。実施形態２において、第２索状部材１３は、厚さ方向に貫通形成される貫通孔２１を有し、第１索状部材１２は、第２索状部材１３の貫通孔２１に挿通して設けられている。   The filter 20 of the second embodiment includes a frame 11, a first cord-shaped member 12 and a second cord-shaped member 13, as in the first embodiment. In the second embodiment, the second cord-shaped member 13 has a through hole 21 penetratingly formed in the thickness direction, and the first cord-shaped member 12 is inserted into the through hole 21 of the second cord-shaped member 13. It is provided.

具体的に、第１索状部材１２は、実施形態１と同様に形成され、図６に示すように、断面形状が円形状となる鋼線を用いて構成されている。第２索状部材１３の貫通孔２１は、所定の間隔を空けて鉛直方向に複数並べて貫通形成されている。貫通孔２１は、中空の円柱形状に形成され、その内径が、第１索状部材１２の直径ｄ１よりも大きく形成されている。また、貫通孔２１は、第２索状部材１３の厚さが最も厚くなる部位に形成されている。このため、貫通孔２１の内面は、表面積が大きなものとなる。第２索状部材１３の貫通孔２１に挿通して設けられる第１索状部材１２は、その外周面が、貫通孔２１の内周面と接触可能となっている。このため、第１索状部材１２及び第２索状部材１３が振動する場合、第１索状部材１２の外周面と貫通孔２１の内周面とが摺接することで振動が減衰される。   Specifically, the first cord-shaped member 12 is formed in the same manner as in the first embodiment and, as shown in FIG. 6, is formed by using a steel wire having a circular cross-sectional shape. The through-holes 21 of the second cord-shaped member 13 are formed so as to be aligned in the vertical direction with a predetermined space therebetween. The through hole 21 is formed in a hollow columnar shape, and the inner diameter thereof is formed larger than the diameter d1 of the first cord-shaped member 12. Further, the through hole 21 is formed at a portion where the second cord-shaped member 13 has the largest thickness. Therefore, the inner surface of the through hole 21 has a large surface area. The outer peripheral surface of the first cord-shaped member 12 that is provided by being inserted into the through hole 21 of the second cord-shaped member 13 is capable of contacting the inner peripheral surface of the through hole 21. Therefore, when the first cord-shaped member 12 and the second cord-shaped member 13 vibrate, the vibration is attenuated by the sliding contact between the outer peripheral surface of the first cord-shaped member 12 and the inner peripheral surface of the through hole 21.

以上のように、実施形態２によれば、第２索状部材１３の貫通孔２１に第１索状部材１２を挿通して設けることで、第１索状部材１２と第２索状部材１３との交差部分を固定することができる。また、第１索状部材１２と第２索状部材１３とが振動する場合であっても、第１索状部材１２が貫通孔２１の内周面に摺接することで、第１索状部材１２及び第２索状部材１３の振動を減衰させることができる。   As described above, according to the second embodiment, the first cord-shaped member 12 and the second cord-shaped member 13 are provided by inserting the first cord-shaped member 12 into the through hole 21 of the second cord-shaped member 13. The intersection with and can be fixed. Further, even when the first cord-shaped member 12 and the second cord-shaped member 13 vibrate, the first cord-shaped member 12 slides into contact with the inner peripheral surface of the through-hole 21 to allow the first cord-shaped member 12 to slide. The vibrations of 12 and the second cord-shaped member 13 can be damped.

また、実施形態２によれば、第２索状部材１３の厚さが最も厚くなる部位に貫通孔２１を形成することで、貫通孔２１の内周面を大きくすることができ、第１索状部材１２と貫通孔２１との接触面積を大きくすることができることから、第１索状部材１２及び第２索状部材１３の振動を、より好適に減衰させることができる。   Further, according to the second embodiment, by forming the through hole 21 at the portion where the thickness of the second cord-shaped member 13 is the thickest, the inner peripheral surface of the through hole 21 can be increased, and the first cord can be formed. Since the contact area between the linear member 12 and the through hole 21 can be increased, the vibrations of the first cord-shaped member 12 and the second cord-shaped member 13 can be damped more preferably.

［実施形態３］
次に、図７を参照して、実施形態３に係るフィルタ３０について説明する。図７は、実施形態３のフィルタの第１索状部材の一例を示す説明図である。なお、実施形態３でも、実施形態１及び実施形態２と重複した記載を避けるべく、異なる部分についてのみ説明し、同一の構成については、同一の符号を付して説明する。 [Third Embodiment]
Next, the filter 30 according to the third embodiment will be described with reference to FIG. 7. FIG. 7 is an explanatory diagram showing an example of the first cord-shaped member of the filter of the third embodiment. In addition, also in the third embodiment, in order to avoid duplicated description of the first and second embodiments, only different parts will be described, and the same configurations will be denoted by the same reference numerals.

実施形態３のフィルタ３０は、実施形態２の鋼線となる第１索状部材１２を、撚り線となる第１索状部材３１に代えたものとなっている。図７に示すように、第１索状部材３１は、複数の素線３５を撚って形成されており、撚り線となる第１索状部材３１が、第２索状部材１３の貫通孔２１に挿通して設けられている。   In the filter 30 of the third embodiment, the first cord-shaped member 12 that is the steel wire of the second embodiment is replaced with a first cord-shaped member 31 that is a stranded wire. As shown in FIG. 7, the first cord-shaped member 31 is formed by twisting a plurality of strands 35, and the first cord-shaped member 31 serving as a stranded wire is a through hole of the second cord-shaped member 13. It is provided by being inserted into 21.

以上のように、実施形態３によれば、第１索状部材３１が振動する場合、撚り線を構成する複数の素線３５間が摺接することで、第１索状部材３１の振動を減衰させることができる。   As described above, according to the third embodiment, when the first cord-shaped member 31 vibrates, the vibration of the first cord-shaped member 31 is damped by the sliding contact between the plurality of strands 35 forming the stranded wire. Can be made.

なお、実施形態１から３において、流線型形状の第２索状部材１３の表面に、さび止めのコーティング膜を形成してもよい。また、実施形態２及び３において、貫通孔２１の内周面に摩耗を抑制するコーティング膜を形成してもよい。   In the first to third embodiments, a rust preventive coating film may be formed on the surface of the streamlined second cord-shaped member 13. Further, in Embodiments 2 and 3, a coating film that suppresses wear may be formed on the inner peripheral surface of the through hole 21.

１ ダクト
１０ フィルタ
１１ フレーム
１２ 第１索状部材
１３ 第２索状部材
２０ フィルタ（実施形態２）
２１ 貫通孔（実施形態２）
３０ フィルタ（実施形態３）
３１ 第１索状部材（実施形態３）
３５ 素線
ｄ１ 直径
ｄ２ 厚さ
Ｌ 長さ DESCRIPTION OF SYMBOLS 1 Duct 10 Filter 11 Frame 12 First cord-shaped member 13 Second cord-shaped member 20 Filter (Embodiment 2)
21 Through Hole (Embodiment 2)
30 filter (Embodiment 3)
31 1st cord-shaped member (Embodiment 3)
35 strand d1 diameter d2 thickness L length

Claims (5)

吸気ダクト内に設けられるフィルタにおいて、
一方向に沿って延在して設けられると共に、複数並べて設けられる第１索状部材と、
他方向に沿って延在して設けられると共に、複数並べて設けられ、前記第１索状部材に交差して設けられる第２索状部材と、を備え、
前記第１索状部材が延在する一方向に直交する面で切った第１断面形状は、円形状であり、
前記第２索状部材が延在する他方向に直交する面で切った第２断面形状は、流線型形状であり、
前記第１索状部材は、前記吸気ダクト内の流れ方向において、前記第２索状部材の上流側に配置されていることを特徴とするフィルタ。 In the filter provided in the intake duct,
A first cord-shaped member that is provided to extend along one direction and that is provided in a line.
A second cord-shaped member that is provided to extend along the other direction, is provided in a line, and that is provided to intersect with the first cord-shaped member,
The first cross-sectional shape cut by a plane orthogonal to one direction in which the first cord-shaped member extends is circular,
The second cross-sectional shape of the second cord-like member is cut along a plane perpendicular to the other direction extending the Ri streamlined shape der,
The filter, wherein the first cord-shaped member is arranged on the upstream side of the second cord-shaped member in the flow direction in the intake duct . 前記第１索状部材と前記第２索状部材との交差部分に形成される溶接部を、さらに備えることを特徴とする請求項１に記載のフィルタ。 The filter of claim 1, wherein the weld is formed at the intersection between the second cord-like member and the first cord-like member, further comprising. 前記第１索状部材は、撚り線であることを特徴とする請求項１または２に記載のフィルタ。 It said first cord-like member A filter according to claim 1 or 2, characterized in that a stranded wire. 請求項１から３のいずれか１項に記載のフィルタを備えることを特徴とする吸気ダクト。 An intake duct comprising the filter according to any one of claims 1 to 3 . 請求項４に記載の吸気ダクトを備えることを特徴とするガスタービン。 A gas turbine comprising the intake duct according to claim 4 .
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