JPH01310398A - Sintered metal sound absorber and its manufacture, and heat-resisting silencer - Google Patents
Sintered metal sound absorber and its manufacture, and heat-resisting silencerInfo
- Publication number
- JPH01310398A JPH01310398A JP63140536A JP14053688A JPH01310398A JP H01310398 A JPH01310398 A JP H01310398A JP 63140536 A JP63140536 A JP 63140536A JP 14053688 A JP14053688 A JP 14053688A JP H01310398 A JPH01310398 A JP H01310398A
- Authority
- JP
- Japan
- Prior art keywords
- sintered metal
- sound
- heat
- sintered
- silencer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 32
- 239000002184 metal Substances 0.000 title claims abstract description 32
- 230000003584 silencer Effects 0.000 title claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 239000006096 absorbing agent Substances 0.000 title abstract description 10
- 239000002245 particle Substances 0.000 claims abstract description 16
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 9
- 239000010935 stainless steel Substances 0.000 claims abstract description 8
- 239000011358 absorbing material Substances 0.000 claims description 24
- 239000012210 heat-resistant fiber Substances 0.000 claims description 9
- 229910001256 stainless steel alloy Inorganic materials 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 230000001590 oxidative effect Effects 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 15
- 238000010521 absorption reaction Methods 0.000 abstract description 10
- 239000000835 fiber Substances 0.000 abstract description 5
- 238000005245 sintering Methods 0.000 abstract description 5
- 229910045601 alloy Inorganic materials 0.000 abstract description 3
- 239000000956 alloy Substances 0.000 abstract description 3
- 239000011148 porous material Substances 0.000 abstract description 2
- 230000002265 prevention Effects 0.000 abstract 1
- 239000000919 ceramic Substances 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 239000004744 fabric Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000011490 mineral wool Substances 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Powder Metallurgy (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は焼結金属吸音材及びその製法と、該吸音材を使
用し九ｆｌｔｔｔｓサイレンサに関し、特にガスタービ
ン、ジェットエンジンの排気サイレンサ、蒸気タービン
用すイレンサ、ファン用（ボイフ用吸気ファン及び押込
みファン）サイレンサ、道路、トンネルを含めた防音壁
及び建築物の壁材として有利に適用しうる吸音材に関す
るものである。Detailed Description of the Invention [Industrial Field of Application] The present invention relates to a sintered metal sound absorbing material, a method for manufacturing the same, and a nine flttts silencer using the sound absorbing material, particularly for use in gas turbines, exhaust silencers for jet engines, and steam turbines. The present invention relates to a sound absorbing material that can be advantageously applied as a silencer for use in a fan, a silencer for a fan (boof intake fan and a push-in fan), a soundproof wall including roads and tunnels, and a wall material of buildings.
従来、ガスタービンの排気サイレンサは、高周波数の音
の吸音性に優れた吸音材であるグラスラー〃を、第４図
（ａ）に示すようなボックス１の中に納めたものである
。この場合、第４図（ａ）の断面図である第４図６）に
示すような構成のものは、ボックス１中のグツスラー／
Ｌ／２が飛散しないように１ボツクス１の壁材に多孔板
３を設け、その内側に細かなステンレス鋼の金網あるい
は発泡金ＩＡ４を設置し、更にその内側にｋ１４０゜や
Ｓｉｎ、を主体とするセラミック７、裂クロス５でグツ
スラ−１ｖ（材質はセラミック製クロスと概ね同一）２
を包み込むようにしている。BACKGROUND ART Conventionally, an exhaust silencer for a gas turbine has a sound-absorbing material called Glasslar, which is excellent in absorbing high-frequency sounds, and is housed in a box 1 as shown in FIG. 4(a). In this case, the configuration shown in FIG. 4(6), which is a cross-sectional view of FIG. 4(a), is
To prevent L/2 from scattering, a perforated plate 3 is installed on the wall material of 1 box 1, and a fine stainless steel wire mesh or foamed metal IA4 is installed inside the perforated plate 3, and inside of the perforated plate 3, a material mainly made of K140° or Sin is installed. Ceramic 7, split cloth 5 and Gutsusura-1v (the material is almost the same as ceramic cloth) 2
I try to embrace it.
しかしながら、上記のような構成では、セラミック製ク
ロス５は硬くて脆いため、セラミック製クロス５とステ
ンレス鋼製金網または発泡金属４と擦り合ってセラミッ
ク製クロス５が容易に破れ、中のグラスラー／Ｌ／２が
ヌテンレス製金網または発泡金属４の中を通過して外部
に流出し吸音特性が…なわれる。また、ステンレス製金
網や発泡金属４は吸音特性がないので、グツスラー／Ｉ
／２のみでは十分に吸音できない約１０００ Ｈｚ以下
の音を吸音することができないという問題がある。However, in the above configuration, the ceramic cloth 5 is hard and brittle, so the ceramic cloth 5 rubs against the stainless steel wire mesh or the foamed metal 4, and the ceramic cloth 5 is easily torn. /2 passes through the nutless wire mesh or foamed metal 4 and flows out to the outside, changing its sound absorption properties. In addition, since stainless steel wire mesh and foam metal 4 do not have sound absorption properties, Gutslar/I
There is a problem that sound of approximately 1000 Hz or less cannot be absorbed sufficiently with only /2.
また、第４図（ａ）の他の態様の断面図である第４図（
Ｃ）に示すような構成のものは、ボックス１の壁材に吸
音性のあるアルミニウム粉末の焼結吸音材６を用いてい
るが、この焼結吸音材６（特公紹５６〜１１３７５号公
報参照）は耐熱性がなく、ガスタービン用排気すイレン
サのように５００〜６００°Ｃの高温になる領域では長
期間使用不可能であるという問題がある。なお第４図（
Ｃ）中、７はアルミニウム粉末焼結吸音材６の支持枠を
示す。Also, FIG. 4(a) is a sectional view of another embodiment of FIG. 4(a).
In the structure shown in C), a sintered sound absorbing material 6 made of aluminum powder with sound absorbing properties is used for the wall material of the box 1. ) has a problem that it does not have heat resistance and cannot be used for a long period of time in areas where the temperature reaches 500 to 600°C, such as in exhaust silencers for gas turbines. In addition, Figure 4 (
In C), 7 indicates a support frame for the aluminum powder sintered sound absorbing material 6.
更に、第４図（Ｃ）に示すような構成の壁材に、ムフイ
トやシャモットのようなセラミックス吸音材を用いた場
合には、セラミックスは硬くて脆く、またポック７１の
支持枠７の金属（低合金鋼またはステンレスｖＡ）との
熱膨張差が大きいため、（金属の熱膨張係数：１２〜１
８×１ｏ−’／’ｃ、セラミックヌの熱膨張係数＝４〜
５×１０−’／”Ｃ）高温で使用するには支持構造の設
計に工夫を要し取扱いが難かしいという問題がある。Furthermore, if a ceramic sound-absorbing material such as mufit or chamotte is used for the wall material of the structure shown in FIG. 4(C), the ceramic is hard and brittle, and the metal ( Due to the large difference in thermal expansion with low alloy steel or stainless steel vA), (coefficient of thermal expansion of metal: 12 to 1
8×1o-'/'c, coefficient of thermal expansion of ceramic material = 4~
5×10-'/''C) When used at high temperatures, there is a problem in that the design of the support structure must be devised and handling is difficult.
そこで、約１０００ Ｈｚ以上の高周波数の音はグラス
ウールなどの耐熱繊維で吸音し、約１０００ Ｈｚ以下
の低周波数の音は壁材で吸音し、かつ壁材内部に充填さ
れる耐熱繊維が飛散しないサイレンを得るためには、５
００〜６００°Ｃのような高温下でも壁材として作用し
、かつ低周波数の音の吸音特性に優れ、耐熱繊維が透過
飛散しないような多孔質の吸音材を開発する必要があっ
た。Therefore, high-frequency sounds of about 1000 Hz or more are absorbed by heat-resistant fibers such as glass wool, and low-frequency sounds of about 1000 Hz or less are absorbed by wall materials, and the heat-resistant fibers filled inside the wall materials do not scatter. To get the siren, 5
It was necessary to develop a porous sound-absorbing material that can function as a wall material even at high temperatures of 00 to 600°C, has excellent sound-absorbing properties for low-frequency sounds, and does not allow heat-resistant fibers to pass through and scatter.
吸音材においては、立体的には粉末粒子間に透過孔が形
成されなければならない。吸音材の中で無数に連続して
存在して連結して存在する孔が不規則となってその通路
が畏く、表面から入る音がそのま＼直進することもなく
、立体的に連結している透過孔を通って音二ネノＶギが
熱エネルギに変化し、音の波動エネルギが減衰しなけれ
ばならない。特にガスタービン用排気すイレンサでは低
周波数の音が問題となるため、低周波数の音を吸収する
特注に優れたものとする必要があるが、音の吸収は透過
孔の側壁よシも、その中に存在する空気の粘性によって
音の波動エネルギが熱エネルギに変換される。そのため
には最適な粒度の粉末状として粒子間を調整する必要が
ある。In sound-absorbing materials, three-dimensional transmission holes must be formed between powder particles. The countless number of consecutive and connected holes in the sound-absorbing material are irregular and the passageway is scary, and the sound that enters from the surface does not travel straight, but is connected three-dimensionally. The sound wave energy must be attenuated as the sound passes through the permeable holes and changes into thermal energy. In particular, low-frequency sounds are a problem with exhaust silencers for gas turbines, so they must be specially made to be excellent at absorbing low-frequency sounds. The viscosity of the air inside converts sound wave energy into thermal energy. For this purpose, it is necessary to adjust the spacing between particles to form a powder with an optimal particle size.
更に、高周波数の音は、焼結金属では吸収することか回
速であるため、ロックウールのような耐熱繊維を用いる
必要があυ、内部の１耐＠繊維が透過しない大きさの透
過孔としなければならない。ロックウールなどの耐熱繊
維は元来、長い繊維状で使用されるものであるが、使用
中に振動や摩擦のため短かく破損し、数μｍからａ十μ
ｍになるため、吸音材の壁材の透過孔が大きいと、この
孔を透過して外部に飛散、消滅し、サイレンサとしての
高周波数の音が吸収されなくなるおそれがある。そのた
め、吸音材の壁は破損した耐熱繊維が透過して消失しな
１ハような大きさの透過孔にしなければならない。Furthermore, since high-frequency sounds are absorbed by sintered metals or rotate at high speeds, it is necessary to use heat-resistant fibers such as rock wool, and the internal permeable holes are large enough to prevent the fibers from passing through. Must be. Heat-resistant fibers such as rock wool are originally used in the form of long fibers, but during use they break into short pieces due to vibration and friction, resulting in fibers ranging from several μm to a dozen μm.
Therefore, if the permeation holes in the wall material of the sound absorbing material are large, the high frequency sound transmitted by the sound absorbing material may be transmitted through the holes and scattered to the outside and disappear, and the high frequency sound as a silencer may not be absorbed. Therefore, the wall of the sound-absorbing material must have a perforation hole of a size of 1 cm so that the damaged heat-resistant fibers cannot pass through and disappear.
本発明は上記の要唱に応じ、高温耐食性及び吸音性に優
れた吸音材を堤供しうる技術を虎供しようとするもので
ある。In response to the above requirements, the present invention attempts to provide a technology that can provide a sound absorbing material with excellent high temperature corrosion resistance and sound absorbing properties.
〔課題を解決するための手段〕
本発明者らは吸音材の壁材の粒度が余り細かくても必し
も吸音性に優れぬことを確認し、更に研究の結果、２５
０〜１２メツシユの範囲の粒度の焼結金属を用いた壁材
が吸音性に優れ、かつ耐熱Ｍ＆維も飛散消失させない気
孔であることを見出し、更に金属粒としてはステンレス
鋼粒がＣｒを１０％以上含んでいるため高温耐食性があ
って好まし原斜であることを見出した。[Means for Solving the Problems] The present inventors confirmed that even if the particle size of the sound absorbing material wall material is too fine, it does not necessarily have excellent sound absorbing properties, and as a result of further research, 25
It was discovered that a wall material made of sintered metal with a grain size in the range of 0 to 12 mesh has excellent sound absorption properties and has pores that do not scatter and eliminate heat-resistant M&fibres. % or more, it has been found that it has high temperature corrosion resistance and is preferable for original slope.
本発明は上記知見に基いて完成されたものであって、
（１）焼結密度が５ｓａｔ７ｅｓ；ｍ以下、焼結金属の
平均粒径が５０〜５００ μｍで流れ抵抗が１０６Ｍ
’Ｋ Ｓ −ｒａｙｌｓ ／ ｍ以下のステンレス鋼か
らなることを特徴とする焼結金属吸音材
［２）２５０〜１２メツシユの範囲Ｋ ｌ、１合したス
テンレス鋼の合金粉末を所望形状に成形し、該成形物を
非酸化性環境下で焼結することを％徴とする多孔質焼結
金属吸音材の製法及び（３） 少なくとも１面が開口
した鋼製の箱体と、該箱体の開口面を覆設する焼結密度
が五３０ｆ／−以下、焼結金属の平均粒径が５０〜ｓｏ
ｎ１１ｍで流れ抵抗が１０６Ｍ Ｋ Ｂ −ｒａｌｙｓ
／ ｍ以下のステンレス鋼からなる焼結金属吸音板と
、該箱体の内部に充填された耐熱繊維とを具備してなる
ことを特徴とする耐熱サイレンサである。The present invention has been completed based on the above findings, and includes: (1) a sintered density of 5sat7es;
Sintered metal sound-absorbing material characterized by being made of stainless steel of 'K S -rayls/m or less [2] A stainless steel alloy powder in the range of 250 to 12 mesh Kl is formed into a desired shape, A method for producing a porous sintered metal sound absorbing material comprising sintering the molded product in a non-oxidizing environment, and (3) a steel box with an opening on at least one side, and an opening in the box. The sintering density covering the surface is 530f/- or less, and the average grain size of the sintered metal is 50~so
Flow resistance at n11m is 106M K B -ralys
This is a heat-resistant silencer characterized by comprising a sintered metal sound-absorbing plate made of stainless steel with a diameter of less than / m, and heat-resistant fibers filled inside the box.
本発明における焼結金属吸音材の焼結密度を五３０ｖ／
−以下とし、焼結金属の平均粒径を５０〜５００ μｍ
とし、かつ流れ抵抗を１０６ＭＫ Ｓ −ｒａｙ：Ｌａ
／ ｍ以下にしたのは、その理論的根拠は不明である
が多くの実験の結果確認されたものである。The sintered density of the sintered metal sound absorbing material in the present invention is 530v/
- or less, and the average particle size of the sintered metal is 50 to 500 μm
and the flow resistance is 106MK S-ray: La
/ m or less, although the theoretical basis for this is unclear, but it has been confirmed as a result of many experiments.
また本発明の焼結金属吸音材を製造する際に使用するス
テンレス鋼の合金粉末の粒度範囲を２５０メツシユ（６
５μＷ＠）〜１２メツシュ（１４１０μｍ）としたのは
、この粒度範囲のものを使用した結果、焼結金属吸音材
の焼結金属の平均粒径が５０〜５００μｍとなるからで
ある。また、焼結時には特に加圧力を加える必要はない
が、僅かな圧力、例えば（Ｌ ５ ｋｇ ／ｌｓ；”以
下の圧力を加えることも妨げない。In addition, the particle size range of the stainless steel alloy powder used in manufacturing the sintered metal sound absorbing material of the present invention is set to 250 mesh (6
The reason for setting the particle size to 5 μW@) to 12 meshes (1410 μm) is that as a result of using particles in this particle size range, the average particle size of the sintered metal of the sintered metal sound absorbing material will be 50 to 500 μm. Furthermore, although it is not necessary to apply particular pressure during sintering, it is possible to apply a slight pressure, for example, a pressure of (L 5 kg /ls) or less.
〔実施例１〕
表１に示した化学組成の１２％Ｃｒステンレス鋼を用い
、表２に示した粒度←）の合金粉末■〜■を製造した。[Example 1] Using 12% Cr stainless steel having the chemical composition shown in Table 1, alloy powders (1) to (2) having the particle size (←) shown in Table 2 were produced.
これらの粉末を僅かに圧力（５００ｗｍ Ｘ Ｓ ＯＯ
ｖｍで約１ ｋｇ加圧）をかけて、約１．２ Ｇ Ｏ”
Ｑで還元性雰囲気で焼結し、第１図の模式図（５０倍の
顕１１＆鏡写真をスケッチしたもの）に示すような組織
の厚さ約４燗の多孔質体の焼結吸音体を製造した。その
焼結吸音体■〜■の焼結密度及び気孔率は表２０ω）
、 （ｃ）に示した通りである。Pour these powders under slight pressure (500wm
Approximately 1.2 G O”
Sintered in a reducing atmosphere with Q to produce a porous sintered sound absorber with a structure approximately 4 mm thick as shown in the schematic diagram in Figure 1 (sketched from a 50x magnification and mirror photograph). Manufactured. The sintered density and porosity of the sintered sound absorbers ■～■ are shown in Table 20ω)
, as shown in (c).
これらの焼結吸音体について、後方に１００■厚さのロ
ックウールを入れて、（＋）ＪＩＳ人１４０５−１９６
３に従って垂直入射吸音率を測定した結果を第２図に、
又（ｉｉ）Ａｓ’ｒＭＣ−５２２−７３によシ流れ抵抗
を測定した結果を表２の（ａ） Ｋ示す。For these sintered sound absorbers, put 100cm thick rock wool in the back and (+) JIS person 1405-196.
Figure 2 shows the results of measuring the normal incidence sound absorption coefficient according to 3.
(ii) The results of measuring the flow resistance using As'rMC-522-73 are shown in (a) K of Table 2.
第２図から明らかなように、Ｚオクターブバンド中心周
波数Ｏ〜１０００Ｈｚの範囲におけ゛る垂直入射吸音率
は、粒度を２５０メツシユよシラ２メツシユにした時に
優れ、またＺオクターブバンド中心周波数０〜７Ｘ１０
”Ｈｚ範囲における垂直入射吸音率特性は粒度１４５メ
ツシユ（１０５μｍ）よシラ２メツシユで優れているこ
とが明らかとなった。As is clear from Fig. 2, the normal incidence sound absorption coefficient in the Z octave band center frequency range of 0 to 1000 Hz is excellent when the particle size is changed from 250 mesh to 2 mesh, and also in the Z octave band center frequency range of 0 to 1000 Hz. 7X10
``It has become clear that the normal incidence sound absorption coefficient characteristics in the Hz range are superior for particle sizes of 145 mesh (105 μm) and 2 mesh.
また、この時の流れ抵抗はｌｌＬ３Ｘ１０４ＭＫ８−
ｒａｙｌｓ ／ ｍであシ、１０６ Ｍ Ｋ Ｓ −ｒ
ａｙｌｓ ／ ｍオーダ以下において優れた吸音特性を
示すことが判る。Also, the flow resistance at this time is llL3X104MK8-
rayls/m Ash, 106 M K S -r
It can be seen that excellent sound absorption characteristics are exhibited below the ayls/m order.
焼結密度は五３２り７国３では吸音特性が不良で、Ａ
３０ ｆ／ｅｓ”以下で優れていることが判る。The sintered density was 532 and 7 countries 3 had poor sound absorption properties, and A
30 f/es'' or less is found to be excellent.
〔実施例２〕
上記実施例１で製造した焼結吸音体を用い、第３図に示
すような排気サイレンサの模擬試験体を製作した。これ
を燃焼試験装置に組込み、ロツクウー〜の飛散状況を調
べた。[Example 2] Using the sintered sound absorber manufactured in Example 1 above, a simulated test body of an exhaust silencer as shown in FIG. 3 was manufactured. This was installed in a combustion test device, and the scattering status of Rockwu was investigated.
この時の試験条件は次の通シである。The test conditions at this time were as follows.
ガス温度：５５０〜６００℃
ガス流速：５０〜６０ ｍ ／ ｓ
試験時間二３００時間
ロツクウー／Ｉ／：■ニチアス社製、 ８０１Ｋｇ／ｍ
”この結果、表２の（ｅ）に示したように、いずれの焼
結吸音体ともロツクウーμの飛散は全く認められなかっ
た。また高温で試験を行ったのにも拘らず、腐食は全く
認められず高温耐食性は良好であった。Gas temperature: 550 to 600°C Gas flow rate: 50 to 60 m/s Test time 2,300 hours Rotsu/I/: ■Manufactured by Nichias, 801Kg/m
``As a result, as shown in (e) of Table 2, no scattering of rock-woo μ was observed in any of the sintered sound absorbers.Also, even though the test was conducted at high temperatures, there was no corrosion at all. No corrosion was observed, indicating good high-temperature corrosion resistance.
なお合金粉末の粒度を１２メツシユよシ粗粒のものを用
いた場合、焼結が十分に行うことができず、焼結吸音体
として使用するに足るものは製作することができなかっ
た。In addition, when using a coarse alloy powder with a particle size of 12 mesh or more, sintering could not be carried out sufficiently, and it was not possible to manufacture a material suitable for use as a sintered sound absorber.
本発明によシ吸音特性、耐熱性に優れ、かつ耐熱繊維の
ノ１１散もない焼結金属吸音材及びその製法が提供され
る。このため、ガスタービン粗排気サイレンサだけでカ
＜、蒸完タービン用、ファン用すイレンサその他の防音
壁にも有利に本発明は適用しうる。The present invention provides a sintered metal sound-absorbing material that has excellent sound-absorbing properties and heat resistance, and does not contain heat-resistant fibers, and a method for producing the same. Therefore, the present invention can be advantageously applied to soundproof walls such as silencers for gas turbine crude exhaust silencers, silencers for steam turbines, and fans.
第１図は本発明の一実施例の焼結金属吸音材の組織の模
式図、第２図は本発明の一実施例の垂直入射吸音率特性
の実測値を示す図表、第３図は本発明の一実施例の耐熱
サイレンサの概略図、第４図は従来の排気サイレンサの
概略図である。FIG. 1 is a schematic diagram of the structure of a sintered metal sound absorbing material according to an embodiment of the present invention, FIG. FIG. 4 is a schematic diagram of a heat-resistant silencer according to an embodiment of the invention, and FIG. 4 is a schematic diagram of a conventional exhaust silencer.
Claims (3)
の平均粒径が５０〜５００μｍで流れ抵抗が１０＾６Ｍ
ＫＳ−ｒａｙｌｓ／ｍ以下のステンレス鋼からなること
を特徴とする焼結金属吸音材。(1) The sintered density is 3.30g/cm^3 or less, the average particle size of the sintered metal is 50 to 500μm, and the flow resistance is 10^6M.
A sintered metal sound absorbing material characterized by being made of stainless steel of KS-rayls/m or less.
ス鋼の合金粉末を所望形状に成形し、該成形物を非酸化
性環境下で焼結することを特徴とする多孔質焼結金属吸
音材の製法。(2) A porous sintered metal sound absorbing material characterized in that stainless steel alloy powder mixed in a range of 250 to 12 mesh is molded into a desired shape and the molded product is sintered in a non-oxidizing environment. Manufacturing method.
の開口面を覆設する焼結密度が３．３０ｇ／ｃｍ＾３以
下、焼結金属の平均粒径が５０〜５００μｍで流れ抵抗
が１０＾６ＭＫＳ−ｒａｌｙｓ／ｍ以下のステンレス鋼
からなる焼結金属吸音板と、該箱体の内部に充填された
耐熱繊維とを具備してなることを特徴とする耐熱サイレ
ンサ。(3) A steel box with at least one side open, and a sintered metal covering the open surface of the box with a density of 3.30 g/cm^3 or less and an average grain size of sintered metal of 50 to 500 μm. A heat-resistant silencer comprising: a sintered metal sound-absorbing plate made of stainless steel having a flow resistance of 10^6 MKS-ralys/m or less; and heat-resistant fibers filled inside the box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63140536A JP2601877B2 (en) | 1988-06-09 | 1988-06-09 | Heat resistant silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63140536A JP2601877B2 (en) | 1988-06-09 | 1988-06-09 | Heat resistant silencer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01310398A true JPH01310398A (en) | 1989-12-14 |
| JP2601877B2 JP2601877B2 (en) | 1997-04-16 |
Family
ID=15270953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63140536A Expired - Lifetime JP2601877B2 (en) | 1988-06-09 | 1988-06-09 | Heat resistant silencer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2601877B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0827769A1 (en) * | 1996-09-10 | 1998-03-11 | PLANSEE Aktiengesellschaft | Filter element |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5091505A (en) * | 1973-12-14 | 1975-07-22 | ||
| JPS5611375A (en) * | 1979-07-10 | 1981-02-04 | Toshiba Corp | Waveform display unit |
-
1988
- 1988-06-09 JP JP63140536A patent/JP2601877B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5091505A (en) * | 1973-12-14 | 1975-07-22 | ||
| JPS5611375A (en) * | 1979-07-10 | 1981-02-04 | Toshiba Corp | Waveform display unit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0827769A1 (en) * | 1996-09-10 | 1998-03-11 | PLANSEE Aktiengesellschaft | Filter element |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2601877B2 (en) | 1997-04-16 |
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