JPS60114614A - Abrasion resistant burner tip - Google Patents

Abstract

PURPOSE:To form the burner tip having excellent abrasion resistance by a method wherein a ceramic pipe is inserted into a penetrating hole of the burner tip, and a low melting waxy material is inserted in the recessed part formed at the outer periphery side of the ceramic pipe, then the waxy material is coagulated after fusing by heating. CONSTITUTION:Each ceramic pipe 4 is respectively inserted into a penetrating hole 3 of a burner tip main body 1, a waxy material 6 is inserted in the recessed part 5 of the penetrating hole. By heating the whole structure under side condition, the waxy material 6 is fused by heating, then the waxy material is adhered on both the burner tip main body 1 and the ceramic pipe 4. Subsequently, by cooling the whole structure, the waxy material 6 is coagulated, the ceramic pipe 4 is fixed to the burner tip main body. Thus, an injecting hole 7 made of ceramic is formed. By the coagulation of the waxy material 6, the ceramic pipe 4 is secured to the burner tip main body 1, accordingly, the injecting hole having excellent abrasion resistance can be formed.

Description

【発明の詳細な説明】 （発明の利用分野） 本発明は、ボイラ等に用いられるバーナチップに係シ、
特に耐摩性に優れる１Ｍ雄性バーナチップに関する。Detailed Description of the Invention (Field of Application of the Invention) The present invention relates to a burner chip used in a boiler, etc.
In particular, it relates to a 1M male burner tip with excellent wear resistance.

（発明の背景） ポイン等に用いられるバーナチップは、燃料の噴出する
複数個の噴孔と、噴出された燃料を空気と混合する燃料
混合室等とよシ形成される。従来、重油焚きボイラでは
、バーナチップの摩耗による噴孔の拡大は、極めて＠微
のため、バーナチップは高速度鋼等からなるバーナチッ
プ本体に直接噴孔を形成する一体構造のものが一般に採
用式れていた〇 しかし１近年になって、粗悪油や、石炭と重油の混合燃
料および石炭と水の混合燃料等が使用される動向にあシ
、上記噴孔の拡大が問題視されている。この解決案とし
て、燃料が高速度で噴出する噴孔をセラミック管で構成
するバー）チップが採用されているが、余滴材料からな
るバーナチップ本体とセラミック管との物性の相異と、
セラミックが難切削性のため複雑形状の加工ができない
こと等によシ、両者を固接する適当な手段がなく、問題
となってい六〇 （発明の目的） 本発明は、上記の問題点を解決するもので、バーナチッ
プ本体とセラミック管とを確笑に同定し耐摩耗性に優れ
た噴孔を形成すると共に、安価に製作し得る耐摩耗バー
ナチップを提供することにある。(Background of the Invention) A burner chip used in a burner or the like is formed with a plurality of nozzle holes through which fuel is jetted, and a fuel mixing chamber where the jetted fuel is mixed with air. Conventionally, in heavy oil-fired boilers, the enlargement of the nozzle hole due to wear of the burner tip is extremely small, so the burner tip is generally made of an integral structure in which the nozzle hole is formed directly in the burner tip body made of high-speed steel, etc. However, in recent years, with the trend toward the use of inferior oil, mixed fuels of coal and heavy oil, and mixed fuels of coal and water, the expansion of the nozzle holes has become a problem. . As a solution to this problem, a bar tip has been adopted in which the nozzle hole through which fuel is ejected at high speed is made of a ceramic tube, but there are differences in physical properties between the burner tip body made of residual material and the ceramic tube.
Due to the fact that ceramics are difficult to cut and cannot be processed into complex shapes, there is no suitable means for firmly bonding the two, which is a problem.60 (Object of the Invention) The present invention solves the above problems. The object of the present invention is to provide a wear-resistant burner tip that can reliably identify the burner tip body and the ceramic tube, form a nozzle hole with excellent wear resistance, and that can be manufactured at low cost.

（発明の概要） 本発明は、上記目的を達成するために、燃料混合室に連
通ずる貫通穴を有するバーナチップ本体の上記貫通穴内
に噴孔を形成するセラミック管を嵌挿すると共に、該セ
ラミック管の外周側に形成される凹部内に、金属材料か
らなる上記バーナチップ本体よシも低融点のろう材を挿
入し、該ろう材を加熱溶融後凝固せしめて上記セラミッ
ク管全バーナチップ本体に固定するようにしｆｃ劇摩耗
バーナチップを特徴としたものである。(Summary of the Invention) In order to achieve the above object, the present invention includes a burner tip body having a through hole that communicates with a fuel mixing chamber, a ceramic tube that forms a nozzle hole inserted into the through hole, and a ceramic tube that forms a nozzle hole. A brazing material having a low melting point on the burner tip body made of a metal material is inserted into the recess formed on the outer circumferential side of the tube, and the brazing material is heated to melt and solidify to form the entire burner tip body of the ceramic tube. It features a fixed fc high wear burner tip.

（発明の実施例） 以下、本発明の実施例を図面に基づき説明する。(Example of the invention) Embodiments of the present invention will be described below based on the drawings.

第１図に示す如く、金属材料から形成されるバーナチッ
プ本体（１）は、中央部に燃料混合室（２）を凹設する
と共に、燃料混合室（２）の周囲には、これに連通ずる
複数個の貫通穴（３）が形成されている◇この貫通穴（
３）はテーパ状に形成され、本実施例では、燃料混合室
（２）側に向って拡大するテーパに形成される。As shown in Fig. 1, a burner tip body (1) made of a metal material has a fuel mixing chamber (2) recessed in the center, and a portion around the fuel mixing chamber (2) connected to the fuel mixing chamber (2). Multiple through holes (3) are formed that communicate with each other ◇This through hole (
3) is formed in a tapered shape, and in this embodiment, it is formed in a taper that expands toward the fuel mixing chamber (2) side.

第２図に示す如く、管状のセラミック管（４）は、セラ
ミック材から形成され、内径側には噴孔（力が形成され
ると共に、外周側は上記バーナチップ本体（１）の貫通
穴（３）のテーパ形状に見合うテーパ状に形成きれる。As shown in FIG. 2, the tubular ceramic tube (4) is made of a ceramic material, and has a nozzle hole (force) formed on the inner diameter side and a through hole (force) of the burner tip body (1) on the outer circumference side. It can be formed into a tapered shape that matches the taper shape of 3).

又、外周には、第５図に詳細に示す如く、凹部（５）が
形成される。凹部（５）はセラミック管（４）の円周方
向に連続又はル１続的に設けられ、その形状は成形又は
加工し易く、かつ応力呆中の生じにくい、例えば円弧状
の溝形状に形成される。Furthermore, a recess (5) is formed on the outer periphery, as shown in detail in FIG. The recess (5) is provided continuously or continuously in the circumferential direction of the ceramic tube (4), and its shape is formed into an arcuate groove shape that is easy to mold or process and is less susceptible to stress cracking. be done.

凹部（５）内に挿入されるろう材（６）　（ｉ　４図に
示す）は、装着強度向上の面から粉末が望ましく、ベー
スト状（ろう材粉末と粘結剤を混合したもの）に形成さ
れる。又、材質は、バーナチップ本体（１）の金塊材料
よシも低融点のもので、かつ、バーナチップの使用温度
によシ溶融しないものが用いられ、バーナチップの使用
温度が６００℃ないし４００℃以下の場合には、市販の
銀ろう又戦類似のものでよ＜％５００℃を超える場合に
は、９００℃以上の融点を有するニッケルろうの如きも
のが採用される。The brazing filler metal (6) (shown in Figure i 4) inserted into the recess (5) is preferably powder from the viewpoint of improving mounting strength, and is formed in the form of a base (a mixture of brazing filler metal powder and binder). be done. In addition, the material used is one that has a low melting point as well as the gold bullion material of the burner tip body (1) and does not melt depending on the operating temperature of the burner tip. If the temperature is below 500°C, a commercially available silver solder or similar solder is used; if the temperature exceeds 500°C, a nickel solder having a melting point of 900°C or higher is used.

第４図は、本実施例のバーナチップを示すもので１バ一
ナチツプ本体（１）の貫通穴（３）には、それぞれセラ
ミック管（４）が″嵌挿され、その四部（５）には、上
記のろう材（６）が挿入される。この状態で、全体を加
熱すると、ろう材（６）が加熱されて溶融し、バーナチ
ップ本体（１）とセラミック管（４）との双方に付着す
る。次に、全体を冷却すると、ろう材（６）が凝固し、
セラミック管（４）はバーナチップ本体に固定される。Fig. 4 shows the burner chip of this embodiment. Ceramic tubes (4) are fitted into the through holes (3) of the burner chip main body (1), respectively, and the four parts (5) The above-mentioned brazing material (6) is inserted. When the whole is heated in this state, the brazing material (6) is heated and melted, and both the burner tip body (1) and the ceramic tube (4) are heated. Next, when the whole is cooled, the brazing filler metal (6) solidifies,
The ceramic tube (4) is fixed to the burner tip body.

以上によシ、セラミックからなる噴孔（７）が形成ちれ
る。Through the above steps, a nozzle hole (7) made of ceramic is formed.

一方、バーナチップ本体（１）の硬度もある程度以上に
高いことが望ましいが、上記の高融点のニッケルろう材
を用いる場合には、バーナチップ本体（１）の焼入処理
を併用することも可能で、工程が短縮される。On the other hand, it is desirable that the hardness of the burner tip body (1) is also higher than a certain level, but when using the above-mentioned high melting point nickel brazing filler metal, it is also possible to use quenching treatment of the burner tip body (1). This shortens the process.

第５図はバーナチップ本体（１）の焼入、焼戻処理を併
う上記ろう材（６）の温度サイクルを示し、横軸に経過
時間ｔ、縦軸に温度Ｔ＝ｉ示す。まず、第１領域Ｉはろ
う材（６）の加熱、溶融とバーナチップ本体（１）の焼
入処理を行うもので、温度Ｔｌにてろう材（６）を加熱
し、溶融せしめた後、更に温度Ｔ２まで加熱し、バーナ
チップ本体（１）の焼入れ加熱を行う。FIG. 5 shows the temperature cycle of the brazing filler metal (6) along with the quenching and tempering treatment of the burner chip body (1), with the elapsed time t on the horizontal axis and the temperature T=i on the vertical axis. First, the first region I is for heating and melting the brazing filler metal (6) and quenching the burner chip body (1). After heating the brazing filler metal (6) at a temperature Tl and melting it, The burner chip body (1) is further heated to a temperature T2 to perform quenching heating.

次に、温度Ｔ３まで急冷し、ろう材（６）を凝固すると
共に、バーナチップ本体（１）全焼入れする。次に、第
２領域■で、温度Ｔ４に加熱し、その後徐冷し、パ・−
ナナｌツブ本体（１）の焼戻しを行う。温度Ｔ３と温度
Ｔ４は大差ないため凝固したろう材（６）が再び溶融し
ない。Next, it is rapidly cooled to a temperature T3 to solidify the brazing filler metal (6), and the burner tip body (1) is completely quenched. Next, in the second region (2), it is heated to a temperature T4, and then slowly cooled, and then heated to a temperature of T4.
Tempering the Nana L tube body (1). Since there is not much difference between the temperatures T3 and T4, the solidified brazing filler metal (6) does not melt again.

セラミック管（４）を上記形状に形成することは特に困
難でなく・一体内に、かつ高精度に成形することも可能
で、安価に製作することができる。又、バーナチップ本
体（１）の熱処理も併用できるので、製作工程を低減す
ることができる・又、ろう箱°Ｌ６１の凝固によシ、セ
ラミック管（４）がバーナチップ本体（１）に確実に固
設され、耐摩性に優れる噴孔が形成される。It is not particularly difficult to form the ceramic tube (4) into the above-mentioned shape, and it is possible to form the ceramic tube (4) in one piece with high precision, and it can be manufactured at low cost. In addition, since heat treatment of the burner tip body (1) can also be used, the manufacturing process can be reduced.In addition, the ceramic tube (4) is securely attached to the burner tip body (1) due to the solidification of the wax box °L61. A nozzle hole with excellent wear resistance is formed.

本実施例で、凹部（５）を円周上１箇所に形成したが、
勿論これに限定するものでない。又、上記の如く、凹部
（５）は円弧状に限定するものでない。又テーパも図示
のものと逆方向であっても構わ々い。In this example, the recess (5) was formed at one location on the circumference, but
Of course, it is not limited to this. Further, as described above, the recess (5) is not limited to an arc shape. Further, the taper may also be in the opposite direction to that shown.

（発明の効果） 以上の説明によって明らかの如く、本発明によれば、酬
摩粍性を向上し、安価に、かつ高精度に製作し得る効果
が上げられる。(Effects of the Invention) As is clear from the above description, according to the present invention, it is possible to improve resistance to damage and manufacture the device at low cost and with high precision.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明了実施例のバーナチップ本体の断面図、
第２図は本実施例のセラミック管の断面図、第６図は第
２図のＡ部の拡大図、第４図は本実施例の全体構成図、
第５図はバーナチップ本体の熱処理を併用する本実施例
のろう材の処理工程を示す線−図である。 １・・・バーナチップ本体、２・・・燃料混合室、６・
・・貫通穴、４・・・セラミック管、５・・・凹部、６
・・・ろう材、７・・・噴孔。 第　１　図 第２図　第３図 第４図　第５図 第１頁の続き ０発　明　者　馬　場　寿　次　長崎重砲の浦町内FIG. 1 is a sectional view of the burner tip body according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of the ceramic tube of this example, FIG. 6 is an enlarged view of section A in FIG. 2, and FIG. 4 is an overall configuration diagram of this example.
FIG. 5 is a line diagram showing the process of processing the brazing filler metal of this embodiment, which also uses heat treatment of the burner chip body. 1...Burner chip body, 2...Fuel mixing chamber, 6.
...Through hole, 4...Ceramic tube, 5...Recess, 6
... Brazing metal, 7... Nozzle hole. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Continued from page 1 0 Inventor Hisatsugu Baba Nagasaki Heavy Artillery Noura Town

Claims (1)

【特許請求の範囲】[Claims] 燃料混合室を形成すると共に、該燃料混合室に連通ずる
貫通穴を有する金属部材からなるバーナチップ本体と、
上記貫通穴に嵌挿され、内径側に噴孔を形成する管体で
ありて、該管体の外周側に四部を形成するセラミック管
と、上記凹部に挿入され、加熱、溶融後凝固して、上記
バーナチップ本体とセラミック管とを接合する上記バー
ナチップ本体よシも低融点のろう材とを有することを特
徴とする耐摩耗バーナチップ。a burner tip body formed of a metal member forming a fuel mixing chamber and having a through hole communicating with the fuel mixing chamber;
A tubular body that is inserted into the through hole and forms a nozzle hole on the inner diameter side, and a ceramic tube that forms four parts on the outer circumferential side of the tubular body, and a ceramic tube that is inserted into the recessed part, heated, melted, and solidified. . A wear-resistant burner tip, characterized in that the burner tip body and the ceramic tube are joined together by a brazing material having a low melting point.