JPH0357866A - Brazing method of air preheater for combustor - Google Patents
Brazing method of air preheater for combustorInfo
- Publication number
- JPH0357866A JPH0357866A JP19353389A JP19353389A JPH0357866A JP H0357866 A JPH0357866 A JP H0357866A JP 19353389 A JP19353389 A JP 19353389A JP 19353389 A JP19353389 A JP 19353389A JP H0357866 A JPH0357866 A JP H0357866A
- Authority
- JP
- Japan
- Prior art keywords
- brazing
- heat exchange
- exchange element
- filler metal
- brazing material
- 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
- 238000005219 brazing Methods 0.000 title claims abstract description 85
- 238000000034 method Methods 0.000 title claims description 7
- 239000002184 metal Substances 0.000 claims abstract description 44
- 239000000463 material Substances 0.000 claims abstract description 23
- 238000002485 combustion reaction Methods 0.000 claims abstract description 18
- 239000000945 filler Substances 0.000 claims description 34
- 238000005192 partition Methods 0.000 claims description 23
- 239000000843 powder Substances 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 2
- 229910000679 solder Inorganic materials 0.000 abstract description 8
- 238000000638 solvent extraction Methods 0.000 abstract 4
- 239000000428 dust Substances 0.000 abstract 2
- 239000007789 gas Substances 0.000 description 17
- 238000003466 welding Methods 0.000 description 11
- 239000011230 binding agent Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 235000009508 confectionery Nutrition 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は、たとえばスターリングエンジン用空気予熱
器などの熱ガス機関の高温側熱交換器に熱を供給するよ
うに用いられる燃焼器用空気予熱器のろう付け方法に関
するもので、詳しくは、波板状の熱交換エレメントの端
面を仕切り板にろう付けする方法に関するものである。Detailed Description of the Invention [Field of Industrial Application] The present invention relates to an air preheater for a combustor used to supply heat to a high temperature side heat exchanger of a hot gas engine, such as an air preheater for a Stirling engine. The present invention relates to a brazing method, and specifically relates to a method of brazing an end face of a corrugated heat exchange element to a partition plate.
［従来の技術］
第５図はたとえば実開昭６０−１４５２５７号公報に示
された従来の燃焼器用空気予熱器の縦断面図であり、同
図において、（ｌ）は波板状の熱交換エレメント、（２
）燃焼空間、（３）は燃焼排気ガスの流路を連通させる
多数のスリット（３ａ）が設けられた防護板、（４）は
燃焼空気（＾）が流入する入口管、（５）は排気ガス（
Ｆ）が流出する出口管である．
第６図は第５図の■一■線に沿って切断した一部拡大断
面図であり、同図において、（６）は排気ガスが流れる
ガス側流路、（７）は燃焼用空気が流れる空気側流路で
ある．（８）は上記熱交換エレメント（１）の一端面に
溶接もしくはろう付けにより接合され、排気ガスと燃焼
用空気が混ざらないように気密化されている仕切りフラ
ンジ、（９）は上記熱交換エレメント（１）の他端に溶
接もしくはろう付けにより接合され気密化された仕切り
フランジである。（ｌ２）は空気側流路（７）を構成さ
せる側板、（１１）はガスｆｆｌｌＪ流路（８）を構成
させるｆｌｌｌＪ板、（ｌ３）は燃料（Ｇ）の供給ノズ
ルである。[Prior Art] Fig. 5 is a vertical cross-sectional view of a conventional air preheater for a combustor disclosed in, for example, Japanese Utility Model Application Publication No. 60-145257, in which (l) is a corrugated heat exchanger. Element, (2
) Combustion space, (3) is a protection plate provided with many slits (3a) that communicate the flow paths of combustion exhaust gas, (4) is an inlet pipe where combustion air (^) flows in, (5) is exhaust gas(
F) is the outlet pipe from which it flows out. Figure 6 is a partially enlarged sectional view taken along line 1 and 2 in Figure 5. In the figure, (6) is the gas side flow path through which exhaust gas flows, and (7) is where the combustion air flows. This is the flow path on the air side. (8) is a partition flange that is joined to one end surface of the heat exchange element (1) by welding or brazing and is made airtight so that the exhaust gas and combustion air do not mix; (9) is the heat exchange element (1) A partition flange that is joined to the other end by welding or brazing to make it airtight. (l2) is a side plate that forms the air side flow path (7), (11) is a flllJ plate that forms the gas ffllJ flow path (8), and (l3) is a fuel (G) supply nozzle.
つぎに、上記構戒の燃焼器用空気予熱器の動作について
説明する。Next, the operation of the above-mentioned combustor air preheater will be explained.
燃焼空間（２）で発生した燃焼排気ガス（Ｆ）はスリッ
ト（３ａ）を通ってガス側流路（６）を流れ、出口管（
５）から大気に流出す１る。一方、人口管（４）にブロ
ワ（図示せず゜）によって送られてきた燃焼用空気（Ａ
）は空気側流路（７）を流れ、その間に対向して流れる
燃焼排ガス（Ｆ）と熱交換されて加熱昇温され、燃Ｉｔ
（Ｇ）と混合されて燃焼空間（２）に供給され燃焼す
るとともに、燃焼排ガス（Ｆ）は逆に熱を奪われて降温
され大気に流出ざれる。The combustion exhaust gas (F) generated in the combustion space (2) passes through the slit (3a), flows through the gas side flow path (6), and flows through the outlet pipe (
5) flows into the atmosphere. On the other hand, combustion air (A
) flows through the air-side flow path (7), where it exchanges heat with the combustion exhaust gas (F) flowing oppositely therebetween, is heated and heated, and the combustion
(G) and is supplied to the combustion space (2) where it is combusted, while the combustion exhaust gas (F) is conversely deprived of heat, cooled down and discharged into the atmosphere.
このようｔｚ空気予熱器に要求される性能としては、熱
交換性能が高く、両流体の流動にともなう圧力損失が小
さいことである。この要求性能を達成するうえで、両流
体が混ざらないように熱交換エレメント（１）の両端面
のシールを確実におこなわなければならない。The performance required of such a tz air preheater is that it has high heat exchange performance and that pressure loss accompanying the flow of both fluids is small. In order to achieve this required performance, both end faces of the heat exchange element (1) must be reliably sealed to prevent the two fluids from mixing.
ところで、上記構成の従来の燃焼器用空気予熱器におい
ては、波板状の熱交換エレメント（１）の両端面とそれ
ぞれに対応した仕切りフランジ（８），（９）とを、第
７図に示すように、Ｔｉｇ ｍ接もしくは旧ｇ溶接（１
４）を介して接合していた。By the way, in the conventional combustor air preheater having the above configuration, both end surfaces of the corrugated heat exchange element (1) and the corresponding partition flanges (8) and (9) are shown in FIG. Tig m welding or old g welding (1
4).
また、溶接に代わって、第８図のように、熱交換エレメ
ント（１）の両端面を鏡板状の仕切り板（ｌＯ）にろう
材（２０）により接合することも従来から知られていた
。Furthermore, instead of welding, it has been known in the past to join both end surfaces of the heat exchange element (1) to a mirror-like partition plate (lO) using a brazing filler metal (20), as shown in FIG.
［発明が解決しようとする課題コ
従来の燃焼器用空気予熱器は以上のように、波板状の熱
交換エレメント（１）の瑞面を仕切りフランジ（ａ）
． （９）や仕切り板（１０）に対して溶接（１４）も
しくはろう付け（２０）により接合していたので、Ｔｉ
ｇ溶接やＭｉｇ溶接による接合の場合は、仕切りフラン
ジ（８） ． （９）の加工コストが高くつき、また溶
接時間もかかり、さらに、確実に溶接するためには熱交
換エレメント（１）の波部のピッチを均一に揃える必要
があって、エレメント自体の加工も困難で、一層のコス
トアップをまねくなどの問題があった。[Problems to be Solved by the Invention] As described above, the conventional air preheater for a combustor has a flange (a) that partitions the first surface of the corrugated heat exchange element (1).
．． (9) and the partition plate (10) by welding (14) or brazing (20).
In the case of joining by g welding or MIG welding, the partition flange (8). The processing cost of (9) is high, and the welding time is also long.Furthermore, in order to ensure reliable welding, the pitch of the corrugations of the heat exchange element (1) must be made uniform, and the processing of the element itself is required. There were problems such as difficulty and further increase in costs.
また、熱交換エレメント（１）を鏡板状の仕切り板（１
０）にろう付けする場合は、ろう材（２０）の一部が毛
細管現象により第７図のように、熱交換エレメントのガ
ス側流路や空気側流路に引き込まれて、流路をつめ、そ
の結果、流路抵抗が増大して圧力損失を大きくするばか
りでなく、ろう材（２０）が流路側に流出して、熱交換
エレメント（１）の端面を接合するためのろう材が不足
し、十分な気密および接合がおこなえないなどの問題が
あった。In addition, the heat exchange element (1) is connected to a mirror plate-like partition plate (1).
0), a part of the brazing filler metal (20) is drawn into the gas-side flow path or air-side flow path of the heat exchange element due to capillary action as shown in Figure 7, closing the flow path. As a result, not only does flow path resistance increase and pressure loss increase, but also the brazing filler metal (20) flows out to the flow path side, resulting in a shortage of brazing filler metal for joining the end faces of the heat exchange element (1). However, there were problems such as insufficient airtightness and insufficient bonding.
この発明は上記のような問題点を解消するためになされ
たもので、ガス側流路や空気側流路側へのろう材の流出
にともなう圧力損失の増大や気密性の低下をまねくこと
なく、確実にろう付けすることができ、またろう付け加
工時間を削減することができる燃焼器用空気予熱飴のろ
う付け方法を提供することを目的とする。This invention was made to solve the above-mentioned problems, and does not increase pressure loss or reduce airtightness due to the flow of brazing filler metal into the gas side flow path or air side flow path. An object of the present invention is to provide a method for brazing air preheating candy for a combustor, which enables reliable brazing and reduces brazing processing time.
［課題を解決するための手段］
この発明に係る燃焼器用空気予熱器のろう付け方法は、
波板状の熱交換エレメントの両端面を仕切り板にろう付
けするろう材としてＮｉろうを用い、このＮｉろうにそ
れの重量に対して１％〜３０％の金属粉末を混合したも
のを使用し、このようなろう材を仕切り板に盛り付け、
このろう材盛り付け面に熱交換エレメントの端面を当接
させてろう材のろう付け温度でろう付けすることを特徴
とする．
［作用］
この発明によれば、金属粉末を混合したＮｉろう材を使
用することにより、このろう材のぬれ性を阻害して仕切
り板に盛り付けたろう材の保持力を増大させることが可
能となる．これにより、盛り付けたろう材が毛細管現象
によって熱交換エレメントの流路に引き込まれることが
なくなり、熱交換エレメントの１４面を接合するろう材
の不足をなくして、確実な気密性のもとで強力に接合す
ることができる。[Means for Solving the Problems] A method for brazing an air preheater for a combustor according to the present invention includes:
Ni solder is used as the brazing material to braze both end faces of the corrugated heat exchange element to the partition plate, and this Ni solder is mixed with 1% to 30% metal powder based on the weight of the Ni solder. , Arrange this type of brazing filler metal on the partition plate,
The feature is that the end face of the heat exchange element is brought into contact with this brazing metal mounting surface and brazing is performed at the brazing temperature of the brazing metal. [Function] According to the present invention, by using the Ni brazing filler metal mixed with metal powder, it is possible to inhibit the wettability of the brazing filler metal and increase the holding power of the brazing filler metal placed on the partition plate. ．． This prevents the loaded brazing filler metal from being drawn into the flow path of the heat exchange element due to capillary action, eliminating the need for insufficient brazing filler metal to join the 14 sides of the heat exchange element, and ensuring strong airtightness. Can be joined.
［発明の実施例］
以下、この発明の一実施例を図面にもとづいて説明する
。[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described based on the drawings.
第１図はこの発明の一実施例による燃焼器用空気予熱器
縦断面図あり、同図において、（１）は波板状に形成さ
れた熱交換エレメント、（２）は燃焼空間、（４）は燃
焼空気（Ａ）が流入する人口管、（５）は排気ガス（Ｆ
）が流出する出口管である。FIG. 1 is a longitudinal sectional view of an air preheater for a combustor according to an embodiment of the present invention, in which (1) is a heat exchange element formed in the shape of a corrugated plate, (2) is a combustion space, and (4) is a heat exchange element formed in the shape of a corrugated plate. is the artificial pipe into which the combustion air (A) flows, and (5) is the exhaust gas (F
) is the outlet pipe.
第２図は第１図のＩＩ − ＩＩ線に沿って切断した一
部拡大断面図であり、同図において、（６）は排気ガス
（Ｆ）が流れるガス側琉路、（７）は燃焼用空気（＾）
が流れる空気側流路である．（１０）は上記熱交換エレ
メント（１）の両端面をろう付けにより接合する鏡板状
の仕切り板、（１１）は燃焼ガス側流路（６）を構成さ
せる側板、（ｌ２）は空気側流路（７）を構成させる側
板、（ｌ３）は燃料（Ｇ）の供給ノズル、（ｌ５）は断
熱材である。Figure 2 is a partially enlarged sectional view taken along line II-II in Figure 1, in which (6) is the gas side route through which the exhaust gas (F) flows, and (7) is the combustion route. Air (＾)
This is the air side flow path through which the air flows. (10) is a mirror plate-like partition plate that joins both end surfaces of the heat exchange element (1) by brazing, (11) is a side plate that constitutes the combustion gas side flow path (6), and (l2) is an air side flow path. The side plate forming the passage (7), (l3) is a fuel (G) supply nozzle, and (l5) is a heat insulating material.
第３図はろう付け個所の要部の．拡大断面斜視図であり
、同図において、（２０）はＢ−Ｃｒ系のＮｉろう（Ｃ
ｒ：ｉｓ， Ｂ：３．５， Ｎｉ：ＢａＬ ）に１００
〜２００メッシュ（平均粒径４０μｍ）のＮｉ粉末を
５％の重量比で混入し、これらをろう付け時に消失する
アルコールなどのバインダーで混合して作威したろう材
である。このろう材（２０）を上記仕切り板（ｌＯ）に
盛り付けるとともに、そのろう材盛り付け面に熱交換エ
レメント（１）の端面を当接させてＮｉろう材のろう付
け温度（１０７０℃）でろう付けしたものである．
上記のように、熱交換エレメント（１）の端面と仕切り
板（１０）とのろう付け用のろう材として、Ｂ−Ｃｒ系
のＮｌろうに重量比で５％のＮｉ粉末をバインダーを介
して混合したろう材を使用することにより、混入したＮ
ｉ粉末がろう材（２０）の流れ性を表面張力により阻害
し、またＮｉ粉末にＮｌろう材（２０）のＣｒとＢが拡
散することにより、ろう材（２０）が流出せず、盛り付
け面上での保持力が増すことＣなる。したがって、熱交
換エレメント（１）のガス側流路（６）や空気側流路（
７）にろう材（２０）が毛細管現象により引き込まれる
ことがなくなり、ろう材（２０）が流路（６） ， （
７）をつめてしまったり、ろう材（２０）が流路（６）
． （７）側に流出することにともなって、熱交換エ
レメント（１）の端面を接合するろう材が不足するよう
なことも起こらなくなり、気密性およびろう付けの信頼
性が向上する。Figure 3 shows the main parts of the brazing points. It is an enlarged cross-sectional perspective view, and in the same figure, (20) is a B-Cr based Ni wax (C
r:is, B:3.5, Ni:BaL) to 100
It is a brazing material made by mixing Ni powder of ~200 mesh (average particle size 40 μm) at a weight ratio of 5%, and mixing these with a binder such as alcohol that disappears during brazing. This brazing filler metal (20) is placed on the partition plate (lO), and the end surface of the heat exchange element (1) is brought into contact with the filler metal placement surface, and brazed at the brazing temperature of Ni brazing filler metal (1070°C). This is what I did. As mentioned above, as a brazing material for brazing the end face of the heat exchange element (1) and the partition plate (10), 5% by weight Ni powder is added to B-Cr based Nl solder via a binder. By using mixed brazing filler metal, mixed N
The i powder inhibits the flowability of the brazing filler metal (20) due to its surface tension, and the Cr and B of the Nl brazing filler metal (20) diffuse into the Ni powder, preventing the brazing filler metal (20) from flowing out and forming a flat surface on the mounting surface. This means that the holding force at the top increases. Therefore, the gas side flow path (6) and the air side flow path (
7) The brazing filler metal (20) is no longer drawn into the flow path (6), (
7) may become clogged, or the brazing filler metal (20) may become stuck in the flow path (6).
．． (7) As a result, there is no shortage of brazing material for joining the end faces of the heat exchange element (1), and the airtightness and brazing reliability are improved.
つぎに、ＮＬ粉末の量について説明する。Next, the amount of NL powder will be explained.
Ｎｉ粉末のろう材中に占める割合が多くなればなるほど
、ろう材の流れ性は悪くなるけれども、その量が多すぎ
ると焼結金属のようになり、所定の気密接合をおこなえ
なくなる。実験によると、Ｎｉ粉末がＮｉ゛ろうの重量
に対して１％〜５％のとき、気密が確実であるとともに
、流路（６） ， （７）にろう材が流出することのな
い最適な量である．一方、Ｎｉ粉末の量が３０％以上に
なると、気密がほとんどできなくなり、また、その接合
強度も低下するため、接合部の信頼性がいちじるしく低
下することにｔｚる．それゆえに、Ｎｉ粉末の混合量は
Ｎｉろう材の重量に対し１〜３０％未溝、好ましくは１
〜５％の範囲が望ましい．なお、上記実施例では、Ｂ−
Ｃｒ系のＮｉろうに重量比で１〜５％のＮｉ粉末をバイ
ンダーを介して混合したろう材を使用したが、Ｂ−Ｃｒ
系のＮｉろうに重量比が５〜１０％で、１５０メッシュ
のステンレス粉末をバインダーを介して混合したろう材
を使用しても、上記実施例と同様の効果を奏する．ここ
で、ステンレス粉末が重量比で３０％以上になると、気
密を維持できなくなるので、最大でもステンレスの割合
を３０％以下の重量比におさえる必要がある。The greater the proportion of Ni powder in the brazing filler metal, the worse the flowability of the filler metal, but if the amount is too large, it becomes like sintered metal, making it impossible to achieve a desired airtight joint. According to experiments, when the Ni powder is 1% to 5% based on the weight of the Ni solder, the airtightness is ensured and the optimum result is that the solder metal does not flow into the channels (6) and (7). It is quantity. On the other hand, when the amount of Ni powder exceeds 30%, airtightness is hardly achieved and the joint strength also decreases, so it is surprising that the reliability of the joint decreases significantly. Therefore, the amount of Ni powder to be mixed is 1 to 30% of the weight of the Ni brazing filler metal, preferably 1 to 30%.
A range of ~5% is desirable. In addition, in the above embodiment, B-
A brazing filler metal in which 1 to 5% by weight Ni powder was mixed with a Cr-based Ni filler via a binder was used, but B-Cr
Even if a brazing filler metal made by mixing 150-mesh stainless steel powder with a binder at a weight ratio of 5 to 10% to Ni brazing material, the same effects as in the above embodiments can be obtained. Here, if the stainless steel powder exceeds 30% by weight, airtightness cannot be maintained, so it is necessary to keep the proportion of stainless steel to a maximum weight ratio of 30% or less.
また、バインダーを用いずにろう材と金属粉末を粉状の
まま混合しても、ろう材を塗布または盛りつけるときに
少し不便であるけれども、同様の効果を奏する．
さらに、第４図に示すように、仕切り板（１０）にろう
材ため用の溝（２１）を形成し、このろうため溝（２１
）に上記ろう材（２０）を埋め込み、そこに熱交換エレ
メント（１）を差し込んで、ろう付けするようにすれば
、ろう付け加工時間をより削減できる効果を有している
。Also, mixing the brazing filler metal and metal powder in powder form without using a binder produces the same effect, although it is a little inconvenient when applying or piling up the brazing filler metal. Furthermore, as shown in FIG. 4, a groove (21) for the brazing material is formed in the partition plate (10).
), the heat exchange element (1) is inserted therein, and brazing is performed. This has the effect of further reducing the brazing processing time.
［発明の効果］
以上のように、この発明によれば、波板状の熱交換エレ
メントの端面と仕切り板とのろう付けに使用するろう材
として、Ｎｉろうにそれの重量に対し１％〜３０％未満
の金属粉末を混合したろう材を用い、このろう材を仕切
り板に盛り付け、その盛り付け面にエレメントの端面を
当接させてろう材のろう付け温度でろう付けしたので、
ろう材のぬれ性を阻害して、ろう材の位置保持力を増大
することができ、熱交換エレメントの流路にろう材が毛
細管現象により引き込まれることを防止できる。したが
って、熱交換エレメントの端面を接合するためのろう材
の不足をなくして、気密性の高い確実な接合を達成させ
ることができる。[Effects of the Invention] As described above, according to the present invention, as a brazing material used for brazing the end face of a corrugated heat exchange element and a partition plate, 1% to 1% of the weight of the Ni brazing material is added. Using a brazing filler metal mixed with less than 30% metal powder, this brazing filler metal was placed on a partition plate, and the end surface of the element was brought into contact with the placed surface and brazed at the brazing temperature of the filler metal.
By inhibiting the wettability of the brazing material, the positioning force of the brazing material can be increased, and it is possible to prevent the brazing material from being drawn into the flow path of the heat exchange element by capillary action. Therefore, there is no shortage of brazing material for joining the end faces of the heat exchange elements, and reliable joining with high airtightness can be achieved.
また、ろう材による流路抵抗および圧力損失の増大もな
く、性能のよい空気予熱器を得ることができる。Furthermore, an air preheater with good performance can be obtained without increasing flow path resistance and pressure loss due to the brazing material.
第１図はこの発明の一実施例による燃焼器用空気予熱器
の縦断面側面図、第２図は第１図ＩＩ − ＩＩ線に沿
って切断した一部拡大断面図、第３図はろう付け個所の
拡大断面斜視図、第４図はこの発明の他の実施例を示す
要部の拡大断面斜視図、第５図は従来の燃焼器用空気予
熱器の縦断面図、第６図は第５図のＶｌ − Ｖｌ線に
沿って切断した一部拡大断面図、第７図は溶接により仕
切り板を気密接合した状態を示す要部の拡大断面斜視図
、第８図は従来のろう付け方法により接合した状態を示
す要部の拡大断面斜視図である。
（１）・・・熱交換エレメント、（６）・・・ガス側流
路、（７）・・・空気側流路、（ｌＯ）・・・仕切り板
、（２０）・・・ろう材。
なお、図中の同一符号は同一または相当部分を示す。FIG. 1 is a vertical cross-sectional side view of an air preheater for a combustor according to an embodiment of the present invention, FIG. 2 is a partially enlarged cross-sectional view taken along line II-II in FIG. FIG. 4 is an enlarged sectional perspective view of main parts showing another embodiment of the present invention, FIG. 5 is a vertical sectional view of a conventional air preheater for a combustor, and FIG. A partially enlarged sectional view taken along the line Vl-Vl in the figure, Fig. 7 is an enlarged sectional perspective view of the main part showing the state in which the partition plates are hermetically joined by welding, and Fig. 8 is a partially enlarged sectional view taken along the line Vl - Vl in the figure. FIG. 3 is an enlarged cross-sectional perspective view of main parts showing a joined state. (1)...Heat exchange element, (6)...Gas side channel, (7)...Air side channel, (lO)...Partition plate, (20)...Brazing material. Note that the same reference numerals in the figures indicate the same or corresponding parts.
Claims (1)
もに他方の面に沿つて燃焼用空気を流すように波板状に
成形された熱交換エレメントの両端面を仕切り板にろう
付けする方法であつて、ろう材を仕切り板に盛り付ける
工程と、熱交換エレメントの端面を仕切り板のろう材盛
り付け面に当接させてろう材のろう付け温度でろう付け
する工程とからなり、上記ろう材として、Ｎｉろうにそ
れの重量に対し１〜３０％未満の金属粉末を混合したも
のを使用することを特徴とする燃焼器用空気予熱器のろ
う付け方法。(1) Both end surfaces of a heat exchange element formed into a corrugated plate shape are brazed to the partition plate so that combustion exhaust gas flows along one of the inner and outer surfaces and combustion air flows along the other surface. The method comprises the steps of placing the brazing filler metal on the partition plate, and brazing the end face of the heat exchange element against the brazing filler metal mounting surface of the partition plate at the brazing temperature of the filler metal. A method for brazing an air preheater for a combustor, characterized in that a mixture of Ni brazing material and metal powder in an amount of 1 to less than 30% based on the weight of the brazing material is used as a brazing material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1193533A JP2629967B2 (en) | 1989-07-25 | 1989-07-25 | Brazing method of air preheater for combustor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1193533A JP2629967B2 (en) | 1989-07-25 | 1989-07-25 | Brazing method of air preheater for combustor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0357866A true JPH0357866A (en) | 1991-03-13 |
| JP2629967B2 JP2629967B2 (en) | 1997-07-16 |
Family
ID=16309660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1193533A Expired - Fee Related JP2629967B2 (en) | 1989-07-25 | 1989-07-25 | Brazing method of air preheater for combustor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2629967B2 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60106691A (en) * | 1983-11-15 | 1985-06-12 | Hitachi Metals Ltd | Alloy for brazing |
| JPS6357793A (en) * | 1986-08-28 | 1988-03-12 | Otsuka Kogyo:Kk | Cathode plate for electrolytic smelting |
| JPS6453796A (en) * | 1987-08-21 | 1989-03-01 | Fukuda Metal Foil Powder | Ni-base heat resistant brazing filler metal having excellent oxidation resistance |
| JPS6470647A (en) * | 1987-09-10 | 1989-03-16 | Mitsubishi Electric Corp | Air preheater |
-
1989
- 1989-07-25 JP JP1193533A patent/JP2629967B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60106691A (en) * | 1983-11-15 | 1985-06-12 | Hitachi Metals Ltd | Alloy for brazing |
| JPS6357793A (en) * | 1986-08-28 | 1988-03-12 | Otsuka Kogyo:Kk | Cathode plate for electrolytic smelting |
| JPS6453796A (en) * | 1987-08-21 | 1989-03-01 | Fukuda Metal Foil Powder | Ni-base heat resistant brazing filler metal having excellent oxidation resistance |
| JPS6470647A (en) * | 1987-09-10 | 1989-03-16 | Mitsubishi Electric Corp | Air preheater |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2629967B2 (en) | 1997-07-16 |
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