JPH0723266B2 - Refractory coating method - Google Patents
Refractory coating methodInfo
- Publication number
- JPH0723266B2 JPH0723266B2 JP60009878A JP987885A JPH0723266B2 JP H0723266 B2 JPH0723266 B2 JP H0723266B2 JP 60009878 A JP60009878 A JP 60009878A JP 987885 A JP987885 A JP 987885A JP H0723266 B2 JPH0723266 B2 JP H0723266B2
- Authority
- JP
- Japan
- Prior art keywords
- refractory
- receiving side
- side member
- metal base
- heat receiving
- 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.)
- Expired - Lifetime
Links
- 229910052751 metal Inorganic materials 0.000 claims description 40
- 239000002184 metal Substances 0.000 claims description 40
- 238000000576 coating method Methods 0.000 claims description 15
- 239000000919 ceramic Substances 0.000 claims description 12
- 230000002093 peripheral effect Effects 0.000 claims description 12
- 238000005219 brazing Methods 0.000 claims description 9
- 238000002844 melting Methods 0.000 claims description 8
- 230000008018 melting Effects 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 239000011819 refractory material Substances 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 4
- 229910000679 solder Inorganic materials 0.000 claims description 3
- 230000004927 fusion Effects 0.000 claims description 2
- 238000001816 cooling Methods 0.000 description 17
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 14
- 239000000843 powder Substances 0.000 description 14
- 229910052709 silver Inorganic materials 0.000 description 14
- 239000004332 silver Substances 0.000 description 14
- 239000007789 gas Substances 0.000 description 12
- 239000012809 cooling fluid Substances 0.000 description 10
- 238000002485 combustion reaction Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000005855 radiation Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 239000000112 cooling gas Substances 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000007943 implant Substances 0.000 description 2
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000010285 flame spraying Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- -1 steam Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Turbine Rotor Nozzle Sealing (AREA)
- Laminated Bodies (AREA)
- Ceramic Products (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、高温ガス乃至高温腐食性ガス環境に曝される
金属製ベース（ポペット弁，タービン翼等）上に、保護
と断熱のためにセラミックの耐火物を被覆するようにし
た耐火物構造において、特に、金属製ベースに耐火物を
脱落なく固着できるようにした耐火物被覆方法に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention provides for protection and thermal insulation on a metal base (poppet valve, turbine blade, etc.) exposed to a hot gas or hot corrosive gas environment. The present invention relates to a refractory structure in which a ceramic refractory is coated, and more particularly to a refractory coating method capable of fixing the refractory to a metal base without dropping.
［従来の技術］ 一般に、ポペット弁，タービン翼等においては、高温ガ
ス又は高温腐食性ガスから表面を隔離して保護するため
にまたはこれらのガスからの入熱をできるだけ制限でき
るようにするために、その受熱側の表面にセラミックの
耐火物を被覆するという対策が施されている。この耐火
物の被覆方法には、従来、炎溶射，プラズマジェットと
いった方法や、セラミックの耐火物をライニングすると
いった方法が用いられている。[Prior Art] Generally, in poppet valves, turbine blades, etc., in order to isolate and protect the surface from high temperature gas or high temperature corrosive gas, or to limit heat input from these gases as much as possible. A measure is taken to coat the surface of the heat receiving side with a ceramic refractory. As a method of coating the refractory, a method such as flame spraying or plasma jet, or a method of lining a ceramic refractory has been conventionally used.
［発明が解決しようとする問題点］ しかしながら、セラミックは熱衝撃に弱く、したがっ
て、コーティングやライニング後に、熱応力，熱衝撃が
加えられると耐火物にクラックが入りやすく、またクラ
ック発生後に、さらに振動を受けると、クラックが成長
して脱落してしまうという問題があった。[Problems to be Solved by the Invention] However, ceramics are vulnerable to thermal shock. Therefore, when thermal stress or thermal shock is applied to the refractory after coating or lining, the refractories are easily cracked, and after cracking, further vibration occurs. When receiving the crack, there was a problem that the crack grew and fell off.
このため、従来は、定期的な検査を実施してその信頼性
を確保せざるを得なかった。For this reason, conventionally, the reliability must be ensured by carrying out a periodical inspection.
本発明は上記問題点を有効に解決すべく創案されたもの
で、その目的は、金属製ベース上に、セラミックの耐火
物を健全に取り付けることができるようにした耐火物被
覆方法を提供することにある。The present invention has been devised to effectively solve the above problems, and an object thereof is to provide a refractory coating method capable of soundly attaching a ceramic refractory onto a metal base. It is in.
［課題を解決するための手段］ 本発明は上記目的を達成すべく、高温ガス乃至高温腐食
性ガスに曝される金属製ベースをセラミックの耐火物で
被覆するに際して、予め耐火物を複数に分割しておくと
共にそれら分割片の被着面にこれより突出させて柱状に
フィンを設けておく一方、金属製ベースにその受熱側と
放熱側との間に冷却乃至断熱のための間隙を形成してお
くと共に金属製ベースにその受熱側に各分割片のフィン
を間隙内に挿入させて各分割片の被着面を金属製ベース
の受熱側面に着座させるための係合孔を設けておき、各
分割片のフィンを各係合孔に夫々係合した後に、各分割
片のフィンの外周面と各係合孔の内周面との間を銀ロウ
等の低融点のロー材で融接して金属製ベースをセラミッ
クの耐火物で被覆するようにしたものである。[Means for Solving the Problems] In order to achieve the above object, the present invention divides a refractory material into a plurality of pieces in advance when coating a metal base exposed to a high temperature gas or a high temperature corrosive gas with a ceramic refractory material. At the same time, the fins are provided in a columnar shape so as to protrude from the adhered surface of the divided pieces, and a gap for cooling or heat insulation is formed between the heat receiving side and the heat radiating side of the metal base. In addition to that, the metal base is provided with an engagement hole for inserting the fin of each divided piece into the gap on the heat receiving side and seating the surface to which each divided piece is attached on the heat receiving side of the metal base. After the fins of each divided piece are engaged in the respective engagement holes, the outer peripheral surface of the fin of each divided piece and the inner peripheral surface of each engagement hole are fusion-welded with a low melting point brazing material such as silver solder. The metal base is coated with a ceramic refractory. It
［作用］ 耐火物を複数の分割片に分割し、銀ロウ等の低融点のロ
ー材によって各分割片のフィンを金属製ベースの係合孔
に融接するという方法は、耐火物全体に熱衝撃を及ぼす
ことがない。また、銀ロウ等のロー材は、融接後、セラ
ミックの分割片によって断熱され、かつ冷却乃至断熱の
ための間隙によって適度に冷却されるため、実際の使用
状態において、再溶融することはない。したがって分割
片は金属製ベースから脱落することなく、金属製ベース
を高温ガス乃至高温腐食性ガス環境から保護する。[Function] The refractory is divided into multiple pieces, and the fins of each piece are fused and welded to the engagement holes of the metal base with a low-melting brazing material such as silver wax. Will not be affected. Further, a brazing material such as a silver brazing material is not thermally remelted in the actual use state because it is thermally insulated by the divided pieces of ceramics after fusion welding and appropriately cooled by the gap for cooling or heat insulation. . Therefore, the divided pieces protect the metal base from a hot gas or hot corrosive gas environment without falling off from the metal base.
［実施例］ 以下に、本発明の耐火物被覆方法の好適実施例を添付図
面に基づいて説明する。[Examples] Preferred examples of the refractory coating method of the present invention will be described below with reference to the accompanying drawings.
第１図において、１は、受熱側部材1aと放熱側部材1bと
から成る金属ベースである。放熱側部材1bは、その表
面、すなわち受熱側部材1a側の面に、所定間隔を隔てて
柱状のフィン1cを多数有している。これらフィン1cは、
その長さは、フィン1cの先端面が受熱側部材1aの裏面に
突き当てられ固着されたときに、受熱側部材1aの裏面と
放熱側部材1bの表面との間に、冷却空間乃至断熱空間と
なる間隙14を形成し得るように定められている。また、
受熱側部材1aは、そのフィン1cが接続される部位を除い
た他の部位に、所定間隔を隔てて係合孔３が設けられて
いる。２は、上記受熱側部材1aの表面を覆うセラミック
の耐火物であり、予め矩形状に分割された多数の耐火物
片2aによって構成されている。各耐火物片2aには、その
裏面の係合孔３と向き合わせられる部分に、係合孔３に
挿通するフィン５を一体に有している。このフィン５
は、その先端面が放熱側部材1bの表面1dと当接されたと
きに、耐火物片2aの裏面４を受熱側部材1aの表面に当接
させるようにその長さが定められている。また、フィン
５には、フィン５の先端面が放熱側部材1bの表面1dと当
接した状態において、耐火物片2aと受熱側部材1aとの一
体化を可能にするために、その係合孔３の内周面と向き
合う部分がその円周方向に沿って窪ませられている。つ
まり、この溝部６に銀ロウ等の低融点の金属粉末（ロウ
材）を充填し、これを溶融、冷却することにより、耐火
物片2aを受熱側部材1aに一体化するようになっている。In FIG. 1, 1 is a metal base composed of a heat receiving side member 1a and a heat radiating side member 1b. The heat dissipation side member 1b has a large number of columnar fins 1c at predetermined intervals on its surface, that is, the surface on the heat receiving side member 1a side. These fins 1c are
The length is such that when the tip end surface of the fin 1c is abutted and fixed to the back surface of the heat receiving side member 1a, a cooling space or a heat insulating space is provided between the back surface of the heat receiving side member 1a and the surface of the heat radiating side member 1b. It is set so that the gap 14 can be formed. Also,
The heat receiving side member 1a is provided with engagement holes 3 at predetermined intervals apart from the site other than the site to which the fin 1c is connected. Reference numeral 2 denotes a ceramic refractory that covers the surface of the heat receiving side member 1a, and is composed of a large number of refractory pieces 2a that are divided into rectangular shapes in advance. Each refractory piece 2a is integrally provided with a fin 5 which is inserted into the engagement hole 3 at a portion of the back surface thereof facing the engagement hole 3. This fin 5
Has a length such that the back surface 4 of the refractory piece 2a is brought into contact with the surface of the heat receiving side member 1a when the tip end surface thereof is brought into contact with the surface 1d of the heat radiating side member 1b. Further, the fins 5 are engaged with each other in order to enable the refractory piece 2a and the heat receiving side member 1a to be integrated in a state where the tip end surface of the fin 5 is in contact with the surface 1d of the heat radiating side member 1b. A portion of the hole 3 facing the inner peripheral surface is recessed along the circumferential direction. That is, the groove 6 is filled with a low melting point metal powder (a brazing material) such as silver wax, and the refractory piece 2a is integrated with the heat receiving side member 1a by melting and cooling the metal powder. .
次に耐火物片2aで金属製ベース１を被覆する方法につい
て詳述する。まず第１図及び第２図に示す如く、受熱側
部材1aの係合孔３に、耐火物片2aのフィン５を挿通し、
フィン５の先端面が放熱側部材1bの表面に突き当たった
ら、銀ロウ等の金属粉末を吹き込んでこれを溝部６内に
供給する。遠心力や加振によって係合孔３の内周面と溝
部６との間に、強制的に金属粉末を充填する。高温炉等
により金属粉末を加熱溶融し、その後、冷却して耐火物
片2aを受熱側部材1aに固着する。Next, a method of coating the metal base 1 with the refractory piece 2a will be described in detail. First, as shown in FIGS. 1 and 2, the fin 5 of the refractory piece 2a is inserted into the engaging hole 3 of the heat receiving side member 1a,
When the tip surface of the fin 5 hits the surface of the heat radiation side member 1b, a metal powder such as silver wax is blown into the groove 6 and supplied. The metallic powder is forcibly filled between the inner peripheral surface of the engagement hole 3 and the groove 6 by centrifugal force or vibration. The metal powder is heated and melted in a high temperature furnace or the like, and then cooled to fix the refractory piece 2a to the heat receiving side member 1a.
このように耐火物２を多数の耐火物片2aから形成し、銀
ロウ等の金属粉末によって耐火物片2aを受熱側部材1aに
固着するという方法によれば、熱衝撃の熱歪が耐火物全
体に影響することがない。このため、クラック、欠損と
いった従来の問題は解消されることになる。また、溝部
６に充填された銀ロウは、耐火物片2aによって断熱さ
れ、間隙14によって適度に冷却されるため、実際の使用
状態において、再溶融することはない。したがって再溶
融による耐火物片2aの脱落もない。なお、上記フィン５
を固着したのと同様にフィン1cの先端を銀ロウ等で融接
するようにしても構わない。In this way, the refractory 2 is formed from a large number of refractory pieces 2a, and the refractory pieces 2a are fixed to the heat receiving side member 1a with a metal powder such as silver wax. It does not affect the whole. Therefore, the conventional problems such as cracks and defects are solved. Further, the silver wax filled in the groove portion 6 is thermally insulated by the refractory piece 2a and appropriately cooled by the gap 14, so that it is not remelted in the actual use state. Therefore, the refractory piece 2a does not fall off due to remelting. In addition, the fin 5
The tip of the fin 1c may be fusion-welded with silver solder or the like as in the case of fixing the.
第３図は本発明に係る耐火物被覆方法を円筒状の金属製
ベース（内燃機関のシリンダ，高温ガスダクト，燃焼器
等）に適用した例を示している。FIG. 3 shows an example in which the refractory coating method according to the present invention is applied to a cylindrical metal base (a cylinder of an internal combustion engine, a high temperature gas duct, a combustor, etc.).
円筒状の放熱側部材1bの外周部には、周方向に所定間隔
を隔てて雌ねじ部９が形成され、その雌ねじ部９に植え
込みボルト（上記実施例で説明したフィン1cに相当す
る）10が螺合されている。このとき各植え込みボルト10
の先端面の位置は、円周方向において揃えられる。受熱
側部材1aを放熱側部材1bに嵌合し、受熱側部材1aを放熱
側部材1bの軸芯に位置決めする。位置決めを終えた後
は、植え込みボルト10のねじ推力を微調節し植え込みボ
ルト10にロックナット11を螺合して放熱側部材1bと受熱
側部材1aとを一体化する。次に、受熱側部材1aの内周面
（受熱面）を耐火物片2aで被覆する。この場合、耐火物
片2aは、受熱側部材1aの内周面に密着して着座し得るよ
うに予め湾曲させて形成され、また受熱側部材1aには、
係合孔３が設けられている。したがって上記実施例と同
様に各係合孔３に各耐火物片2aのフィン５を係合させた
後、係合孔３とフィン５の溝部６との間に銀ロウ等の金
属粉末を吹き込みんでこれを溶融し冷却すれば、耐火物
片2aは受熱側部材1aに一体に固着される。なお、放熱側
部材1bに、冷却口を設け、間隙14に、空気または蒸気化
された冷却流体を供給し循環させれば、金属ベース１及
び耐火物片2aをさらに好適に冷却することができる。A female screw portion 9 is formed on the outer peripheral portion of the cylindrical heat radiating side member 1b at predetermined intervals in the circumferential direction. It is screwed. At this time, each stud bolt 10
The positions of the tip surfaces of the are aligned in the circumferential direction. The heat receiving side member 1a is fitted to the heat radiating side member 1b, and the heat receiving side member 1a is positioned on the axis of the heat radiating side member 1b. After the positioning is completed, the screw thrust of the implant bolt 10 is finely adjusted and the lock nut 11 is screwed into the implant bolt 10 to integrate the heat radiation side member 1b and the heat receiving side member 1a. Next, the inner peripheral surface (heat receiving surface) of the heat receiving side member 1a is covered with the refractory piece 2a. In this case, the refractory piece 2a is formed by being curved in advance so that it can be seated in close contact with the inner peripheral surface of the heat receiving side member 1a, and the heat receiving side member 1a,
An engagement hole 3 is provided. Therefore, after engaging the fins 5 of the refractory pieces 2a in the engagement holes 3 as in the above-described embodiment, a metal powder such as silver wax is blown between the engagement holes 3 and the groove portions 6 of the fins 5. Then, when this is melted and cooled, the refractory piece 2a is integrally fixed to the heat receiving side member 1a. If the cooling port is provided in the heat radiation side member 1b and air or vaporized cooling fluid is supplied to the gap 14 and circulated, the metal base 1 and the refractory piece 2a can be cooled more suitably. .
第４図は、高温ガスダクト内面を耐火物片2aで被覆した
例を示している。耐火物片2aの取り付けは、第３図の場
合と同じである。FIG. 4 shows an example in which the inner surface of the high temperature gas duct is covered with the refractory piece 2a. The attachment of the refractory piece 2a is the same as in the case of FIG.
なお、上記放熱側部材1bの外周面には、第３図に示すよ
うにロックナット11を着座させるために平坦に座面が形
成されているが、ロックナットの座面に座グリ部をテー
パー状に形成してこれに座面がテーパー状のロックナッ
トを嵌合させるようにしても構わない。また、受熱側部
材1aの位置決めを容易なものとするために、受熱側部材
1aの外周部に植え込みボルト10の先端部を嵌合させる得
るように窪みを設けることも可能である。A seat surface is formed flat on the outer peripheral surface of the heat radiation side member 1b for seating the lock nut 11, as shown in FIG. 3, but a counterbore portion is tapered on the seat surface of the lock nut. Alternatively, a lock nut having a seat surface with a tapered shape may be fitted into this. Further, in order to facilitate the positioning of the heat receiving side member 1a, the heat receiving side member
It is also possible to provide a recess in the outer periphery of 1a so that the tip of the stud 10 can be fitted therein.
第５図，第６図は、内燃機関等のピストンに適用した例
を示している。5 and 6 show an example applied to a piston of an internal combustion engine or the like.
円筒状の耐火物２は、予め頂面1dの周方向において扇形
に分割されており、ピストン15は、その頂面部に耐火物
２を嵌め込むためのインロー部16を有している。そして
ピストン15の頂面1dには、これより突出させて柱状にフ
ィン1cが設けられている。The cylindrical refractory 2 is divided in advance into a fan shape in the circumferential direction of the top surface 1d, and the piston 15 has a spigot portion 16 into which the refractory 2 is fitted. The top surface 1d of the piston 15 is provided with a fin 1c in a columnar shape so as to project from the top surface 1d.
まずフィン1cの先端面に、円盤状の受熱側部材1aを載置
し固着する。その後、耐火物片2aのフィン５を受熱側部
材ａの係合孔３に嵌合させる。その後、フィン５の溝部
６と係合孔３との間に銀ロー等の金属粉末を充填し溶融
し冷却してピストン15の頂部1dに耐火物片2aを固着す
る。First, the disk-shaped heat receiving side member 1a is placed and fixed on the tip surface of the fin 1c. Then, the fins 5 of the refractory piece 2a are fitted into the engagement holes 3 of the heat receiving side member a. After that, metal powder such as silver brazing is filled between the groove 6 of the fin 5 and the engagement hole 3, melted and cooled to fix the refractory piece 2a to the top 1d of the piston 15.
なお、ピストン15と金属ベース１との固着にあっては、
第５図，第７図に示す如く、特定のフィン1cが受熱側部
材1aを貫通してその先端面が耐火物片2aの内面に当接し
得る長さに設定され、そしてそのフィン1cの先端に開先
を施して、開先と耐火物片2aの内面との間に、銀ロー等
の金属粉末を充填し溶融し冷却することにより、耐火物
片2aを頂部1dに固着するようになっている。また、ピス
トン15の頂面1dと上記受熱側部材1aとの間の間隙14に冷
却流体を供給し、間隙14で熱交換した冷却流体を排出さ
せることができるようにするために供給ポート17と排出
ポート18とが設けられている。When the piston 15 and the metal base 1 are fixed,
As shown in FIG. 5 and FIG. 7, the specific fin 1c penetrates the heat receiving side member 1a and its tip surface is set to a length such that it can abut the inner surface of the refractory piece 2a, and the tip of the fin 1c. A groove is provided on the refractory piece 2a, and the refractory piece 2a is fixed to the top 1d by filling and melting and cooling a metal powder such as silver braze between the groove and the inner surface of the refractory piece 2a. ing. In addition, a cooling fluid is supplied to the gap 14 between the top surface 1d of the piston 15 and the heat receiving side member 1a, and a cooling fluid that has exchanged heat in the gap 14 can be discharged so that the cooling fluid can be discharged. A discharge port 18 is provided.
第８図乃至第10図は、内燃機関のポペット弁に適用した
例が示されている。8 to 10 show an example applied to a poppet valve of an internal combustion engine.
従来はポペット弁を中空としてポペット弁内に冷却室を
形成し、冷却室にバナジウム等の冷却流体を封入して蒸
発・凝縮を繰り返させ、弁傘部を冷却するという方法が
採られていたが、この冷却方法は、ポペット弁を過冷却
してしまうといった問題や、低温腐食が生じてしまうと
いった問題があった。Conventionally, a method has been adopted in which a poppet valve is made hollow and a cooling chamber is formed in the poppet valve, and a cooling fluid such as vanadium is enclosed in the cooling chamber to repeat evaporation and condensation to cool the valve umbrella portion. However, this cooling method has problems that the poppet valve is overcooled and that low-temperature corrosion occurs.
そこで、ポペット弁を良好な状態に保つためには、上記
の実施例と同様に、ポペット弁の弁傘部への入熱量を耐
火物で断熱するという方法が有効となる。Therefore, in order to keep the poppet valve in a good state, it is effective to insulate the heat input to the valve head portion of the poppet valve with a refractory material, as in the above embodiment.
第８図に示す例では、ポペット弁25は、予め弁傘部26に
おいてポペット弁25の軸方向に弁棒27側の上部本体28
と、弁傘部26側の下部本体29とに２つに分割されてい
る。すなわち、この実施例にあっては、下部本体29が、
上記実施例の受熱側部材1aに対応し、上部本体28が上記
実施例の放熱側部材1bに対応する。In the example shown in FIG. 8, the poppet valve 25 has an upper main body 28 on the valve rod 27 side in the axial direction of the poppet valve 25 in the valve head portion 26 in advance.
And the lower main body 29 on the valve head portion 26 side is divided into two parts. That is, in this embodiment, the lower body 29 is
The upper body 28 corresponds to the heat receiving side member 1a of the above embodiment, and the upper body 28 corresponds to the heat radiating side member 1b of the above embodiment.
上部本体28には、その弁棒27の軸芯に沿って通路30が形
成され、通路30は弁傘部26内の上方に拡径して形成され
た冷却室31と連通している。また、上部本体28の分割面
にはその軸芯部に、これより開口されて冷却室31と連通
する連絡ポート32が形成され、連絡ポート32の上部は拡
径されて嵌合部33となっており、これに管状部材36を嵌
合させて設けることによって、管状部材36内に冷却ガス
を循環させるための第１冷却通路34が形成され、管状部
材36の外側に冷却ガスを循環させるための第２冷却通路
35が形成されるようになっている。A passage 30 is formed in the upper main body 28 along the axis of the valve rod 27, and the passage 30 communicates with a cooling chamber 31 formed in the valve umbrella portion 26 so as to have an enlarged diameter. Further, on the split surface of the upper main body 28, a communication port 32 that is opened from this and communicates with the cooling chamber 31 is formed in the axial core portion, and the upper portion of the communication port 32 is expanded to become the fitting portion 33. By fitting the tubular member 36 into the tubular member 36, the first cooling passage 34 for circulating the cooling gas is formed in the tubular member 36, and the cooling gas is circulated outside the tubular member 36. Second cooling passage
35 are to be formed.
上部本体28には、その分割面の周側部に、これより開口
され冷却室31に連通するポート37が設けられている。ポ
ート37は、周方向に間隔を隔てて放射状に設けられてい
る。The upper main body 28 is provided with a port 37, which is opened from this and communicates with the cooling chamber 31, on the peripheral side of the divided surface. The ports 37 are radially provided at intervals in the circumferential direction.
上部本体28は、その分割面にフィン1cが設けられてい
る。The upper body 28 is provided with fins 1c on its dividing surface.
下部本体29は、そのバルブフェイス部38の外周縁より内
方の部分が耐火物２を収容すべく全体として円筒状に窪
ませられている。そして下部本体29には、円周及び半径
方向に間隔を隔てて係合孔３が設けられている。The lower main body 29 is hollowed out in a cylindrical shape as a whole so as to accommodate the refractory 2 at a portion inside the outer peripheral edge of the valve face portion 38. The lower body 29 is provided with engagement holes 3 at intervals in the circumferential and radial directions.
耐火物２は、第８図乃至第10図に示す如く、上部本体28
の軸芯部に設けられた係合孔３に、フィン５が挿通され
る円盤状の耐火物片2eと、他の係合孔３に嵌合するフィ
ン５をそれぞれ一体に有し耐火物片2eを中心にして上記
円筒状の窪みに放射状に配列される扇形の耐火物片2aと
から成り、各耐火物片2e,2aのフィン５は、その長さ
が、耐火物片2a,2eの裏面が下部本体28の表面に当接さ
れたときに、フィン５の先端面が上部本体28の表面と当
接するようになっている。もちろんフィン５には、上記
と同様に溝部６が設けられている。耐火物２の被覆は、
まず、各耐火物片2a,2eの各フィン５が、上記各係合孔
３に挿通された後、上記実施例と同様に耐火物片2a,2e
の被着面1dと下部本体29との間に銀ロウ等の金属粉末が
吹き込まれ、その後に、回転，振動等がポペット弁25に
加えられて金属粉末が充填され、その後に加熱炉等によ
り金属粉末が溶融され、冷却されることによりなされ
る。The refractory 2 has an upper body 28 as shown in FIGS.
The disc-shaped refractory piece 2e into which the fins 5 are inserted and the fins 5 fitted into the other engagement holes 3 are integrally formed in the engagement holes 3 provided in the shaft core of the refractory piece. 2e is composed of a fan-shaped refractory piece 2a radially arranged in the cylindrical recess, and the fins 5 of each refractory piece 2e, 2a have a length equal to that of the refractory pieces 2a, 2e. When the back surface contacts the surface of the lower body 28, the tip surfaces of the fins 5 contact the surface of the upper body 28. Of course, the fin 5 is provided with the groove portion 6 similarly to the above. Refractory 2 coating is
First, after the fins 5 of the refractory pieces 2a, 2e are inserted into the engagement holes 3, the refractory pieces 2a, 2e are inserted in the same manner as in the above embodiment.
A metal powder such as silver wax is blown between the adhered surface 1d of the lower body 29 and the lower body 29, and thereafter, rotation, vibration and the like are added to the poppet valve 25 to fill the metal powder, and then by a heating furnace or the like. This is done by melting the metal powder and cooling it.
第11図は、リターンフロー式のタービン翼に適用した例
を示している。FIG. 11 shows an example applied to a return flow type turbine blade.
図において、2aはフィン５を有する耐火物片、1aは受熱
側部材、1bは放熱側部材、1cはフィンである。In the figure, 2a is a refractory piece having fins 5, 1a is a heat receiving side member, 1b is a heat radiating side member, and 1c is a fin.
図示される如く、放熱側部材1bの両側面には、フィン1c
を介して受熱側部材1aが一体的に接合され、その受熱側
部材1aの各係合孔３に耐火物片2aのフィン５が挿通され
ている。耐火物片2aのフィン５の溝部６と係合孔３との
間に、上述の如く銀ロウ等の金属粉末が充填され、その
後後、金属粉末を溶融し冷却してフィン５を放熱側部材
1bに固着する。この例にあっても、被着面部1dと受熱側
部材1aとの間には、上述の実施例と同様に間隙14が形成
されている。耐火物片2aには、その表面側（タービン翼
の回転方向）に間隙14と連通させて冷却流体吹き出し口
41が複数形成されている。As shown in the figure, the fins 1c are provided on both side surfaces of the heat dissipation side member 1b.
The heat receiving side member 1a is integrally joined via the heat receiving side member 1a, and the fins 5 of the refractory piece 2a are inserted into the respective engagement holes 3 of the heat receiving side member 1a. Between the groove portion 6 of the fin 5 of the refractory piece 2a and the engagement hole 3, the metal powder such as silver wax is filled as described above, and thereafter, the metal powder is melted and cooled to make the fin 5 a heat radiating side member.
Stick to 1b. Also in this example, a gap 14 is formed between the adherend surface portion 1d and the heat receiving side member 1a, as in the above-described embodiment. The refractory piece 2a communicates with the gap 14 on the surface side (rotational direction of the turbine blade) of the refractory piece 2a so that a cooling fluid outlet is formed.
A plurality of 41 are formed.
流体供給ポート（図示せず）から供給された冷却流体
は、タービン翼40の背面側の冷却空間を流れて翼先端を
回り表面側の間隙14に送給される。吹き出し口41から吹
き出された冷却流体はタービン翼40の表面側に沿って流
れ、耐火物片2aに対して冷却フィルム42を形成しタービ
ン翼40を良好に冷却する。The cooling fluid supplied from the fluid supply port (not shown) flows through the cooling space on the back surface side of the turbine blade 40, goes around the tip of the blade, and is fed to the gap 14 on the surface side. The cooling fluid blown out from the outlet 41 flows along the surface side of the turbine blade 40, forms a cooling film 42 on the refractory piece 2a, and cools the turbine blade 40 well.
なお、フィン５の形状，フィン1cの形状は、柱状に限定
されたものではく、間隙14を流れる冷却流体を流れ易く
するような形状に形成されるものであるが、強度を優先
する必要があるときは、異形断面としても構わない。も
ちろんこの場合にあっても係合孔３はフィン1cの形状に
あわせたものとなる。It should be noted that the shape of the fins 5 and the shape of the fins 1c are not limited to columnar shapes, and are formed to facilitate the flow of the cooling fluid flowing through the gaps 14, but it is necessary to give priority to strength. In some cases, a modified cross section may be used. Of course, even in this case, the engagement hole 3 is adapted to the shape of the fin 1c.
なお、上記各実施例で述べた耐火物片2aは、熱膨張しに
くいセラミック、例えばSiC,Si3N4から形成されてい
る。また銀ロウ等の低溶融金属によるロウ付けの際に、
耐火物片2aの接合部、実施例においては溝部６に表面処
理を施すことによって良好な溶着を得ることもできる。The refractory piece 2a described in each of the above embodiments is formed of a ceramic that does not easily expand thermally, such as SiC or Si 3 N 4 . Also, when brazing with a low melting metal such as silver wax,
Good welding can also be obtained by subjecting the joint portion of the refractory piece 2a, in the embodiment, the groove portion 6 to a surface treatment.
以上説明したことから明らかなように上述の実施例によ
れば次の如き優れた効果が得られる。As is apparent from the above description, according to the above-described embodiment, the following excellent effects can be obtained.
金属ベース上の被着面に、金属ベースの大小にかか
わらず耐火物を容易に被覆できる。The refractory can be easily coated on the adherend surface on the metal base regardless of the size of the metal base.
フィン５の先端面を金属ベース１に当接させて、外
力を受けるようにしたので、接合部（溶着部）に加えら
れる荷重を少なくし脱落防止を図ることができる。Since the tip surfaces of the fins 5 are brought into contact with the metal base 1 to receive an external force, it is possible to reduce the load applied to the joint portion (welded portion) and prevent falling.
銀ロウ等の再溶融を防いで耐火物片の脱落を防止す
ることができる。It is possible to prevent remelting of silver wax and the like and prevent the refractory pieces from falling off.
冷却流体を任意に水，空気，蒸気，油及びその他の
冷媒に変更可能であるため、広範な用途に適用すること
ができる。Since the cooling fluid can be arbitrarily changed to water, air, steam, oil and other refrigerants, it can be applied to a wide range of applications.
銀ロウ等の溶着による被覆方法は製作費が安く作業
を省力化することができる。The coating method by welding silver brazing or the like is low in manufacturing cost and can save labor.
［発明の効果］ 以上詳述したように本発明によれば次の如き優れた効果
を発揮する。[Effects of the Invention] As described in detail above, according to the present invention, the following excellent effects are exhibited.
（１）熱衝撃による耐火物片のクラックを防ぐことがで
き、耐火物片を脱落なく金属ベースに固着しておくこと
ができる。(1) It is possible to prevent cracks of the refractory piece due to thermal shock, and the refractory piece can be fixed to the metal base without falling off.
（２）製作費が安くかつ簡単に製作することができる。(2) The production cost is low and the production is easy.
第１図は本発明の耐火物被覆方法の好適一実施例を示す
概略断面図、第２図は第１図のII−II線断面矢視図、第
３図は内燃機関のシリンダ，高温ガスダクト及び燃焼器
等に本発明の耐火物被覆方法を適用した例を示す図、第
４図は第３図のIV−IV線断面矢視図、第５図は内燃機関
のピストンに適用した例を示す図、第６図は第５図のVI
−VI線断面矢視図、第７図は第５図の要部詳細図、第８
図は本発明の耐火物被覆方法を内燃機関のポペット弁に
適用した例を示す図、第９図は第８図のIX−IX線断面矢
視図、第10図は第８図のＸ−Ｘ線矢視図、第11図はター
ビン翼に適用した例を示す図である。 図中１は金属ベース、２は耐火物、2aは耐火物片、３は
係合孔、５はフィン、14は間隙である。FIG. 1 is a schematic sectional view showing a preferred embodiment of the refractory coating method of the present invention, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, and FIG. 3 is a cylinder of an internal combustion engine, a high temperature gas duct. And a diagram showing an example in which the refractory coating method of the present invention is applied to a combustor, etc., FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3, and FIG. 5 is an example applied to a piston of an internal combustion engine. Figure, Figure 6 is VI of Figure 5
-VI line cross-sectional arrow view, FIG. 7 is a detailed view of an essential part of FIG. 5, and FIG.
FIG. 9 is a diagram showing an example in which the refractory coating method of the present invention is applied to a poppet valve of an internal combustion engine, FIG. 9 is a sectional view taken along line IX-IX of FIG. 8, and FIG. 10 is X- of FIG. X-ray arrow view, FIG. 11 is a diagram showing an example applied to a turbine blade. In the figure, 1 is a metal base, 2 is a refractory, 2a is a refractory piece, 3 is an engagement hole, 5 is a fin, and 14 is a gap.
Claims (1)
属製ベースをセラミックの耐火物で被覆するに際して、
予め耐火物を複数に分割しておくと共にそれら分割片の
被着面にこれより突出させて柱状にフィンを設けておく
一方、金属製ベースにその受熱側と放熱側との間に冷却
乃至断熱のための間隙を形成しておくと共に金属製ベー
スにその受熱側に各分割片のフィンを間隙内に挿入させ
て各分割片の被着面を金属製ベースの受熱側面に着座さ
せるための係合孔を設けておき、各分割片のフィンを各
係合孔に夫々係合した後に、各分割片のフィンの外周面
と各係合孔の内周面との間を銀ロウ等の低融点のロー材
で融接して金属製ベースをセラミックの耐火物で被覆す
るようにしたことを特徴とする耐火物被覆方法。1. When coating a metal base exposed to a high temperature gas or a high temperature corrosive gas with a ceramic refractory material,
The refractory is divided into a plurality of pieces in advance and fins are provided in a columnar shape so as to project from the divided surface of the divided pieces, while the metal base is cooled or insulated between the heat receiving side and the heat radiating side. For inserting the fins of the divided pieces into the gap on the heat receiving side of the metal base so that the adhered surface of each divided piece is seated on the heat receiving side surface of the metal base. A fitting hole is provided, and after the fins of each divided piece are engaged with the respective engagement holes, a low level of silver solder or the like is provided between the outer peripheral surface of the fin of each divided piece and the inner peripheral surface of each engagement hole. A refractory coating method, characterized in that a metal base is coated with a ceramic refractory by fusion welding with a brazing material having a melting point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60009878A JPH0723266B2 (en) | 1985-01-24 | 1985-01-24 | Refractory coating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60009878A JPH0723266B2 (en) | 1985-01-24 | 1985-01-24 | Refractory coating method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61174176A JPS61174176A (en) | 1986-08-05 |
| JPH0723266B2 true JPH0723266B2 (en) | 1995-03-15 |
Family
ID=11732410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60009878A Expired - Lifetime JPH0723266B2 (en) | 1985-01-24 | 1985-01-24 | Refractory coating method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0723266B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58151240A (en) * | 1982-03-02 | 1983-09-08 | 日本通商株式会社 | Method of lining construction of abrasion resistance material |
| JPS5997410A (en) * | 1982-11-29 | 1984-06-05 | Babcock Hitachi Kk | Burner impeller |
-
1985
- 1985-01-24 JP JP60009878A patent/JPH0723266B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61174176A (en) | 1986-08-05 |
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