JPH0672691B2 - Injection nozzle for underwater vehicle engine and method of manufacturing the same - Google Patents
Injection nozzle for underwater vehicle engine and method of manufacturing the sameInfo
- Publication number
- JPH0672691B2 JPH0672691B2 JP3271589A JP3271589A JPH0672691B2 JP H0672691 B2 JPH0672691 B2 JP H0672691B2 JP 3271589 A JP3271589 A JP 3271589A JP 3271589 A JP3271589 A JP 3271589A JP H0672691 B2 JPH0672691 B2 JP H0672691B2
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- injection hole
- injection
- metal
- vehicle engine
- 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
Landscapes
- Fuel-Injection Apparatus (AREA)
- Gas Burners (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は，水中航走体のエンジンを構成する特殊ボイラ
に適用されるSF6（六弗化硫黄）ガスの噴射ノズルに関
するものである。The present invention relates to an SF 6 (sulfur hexafluoride) gas injection nozzle applied to a special boiler constituting an underwater vehicle engine.
水中航走体のエンジン部分を構成する特殊ボイラで，燃
料に液体リチウムを用い，その中に酸化剤としてSF6ガ
スを噴射するものがある。そのような特殊ボイラに適用
される従来の噴射ノズルは，第５図に示されるように，
ノズル先端部材（02）にタングステンなどの耐熱性高融
点材料を配し，その後端に溶接可能な金属材料のノズル
本体（03）を取付けた構造であった。したがって，使用
中脆いタングステンに割れが発生し，この割れに浸透し
たSF6ガスが加熱分解して割れを起点としてタングステ
ンを腐食させ，その結果噴射孔（02a）が拡大してノズ
ルとしての機能を低下させる心配があった。There is a special boiler that constitutes the engine part of an underwater vehicle, which uses liquid lithium as fuel and injects SF 6 gas as an oxidizer into it. A conventional injection nozzle applied to such a special boiler is, as shown in FIG.
The nozzle tip member (02) had a structure in which a heat-resistant high-melting-point material such as tungsten was placed, and the nozzle body (03) of a weldable metal material was attached to the rear end. Therefore, a brittle tungsten is cracked during use, and the SF 6 gas that has penetrated into this crack is thermally decomposed to corrode the tungsten starting from the crack, and as a result, the injection hole (02a) expands and functions as a nozzle. I was worried about lowering it.
前記のように特殊ボイラに適用される従来の噴射ノズル
は，使用中の加熱に起因する熱応力などによって，内部
の噴射孔から割れが発生し，この割れが原因で噴射孔周
りの腐食が進展して噴射孔が拡大し，ノズルとしての機
能が低下する。As described above, the conventional injection nozzle applied to the special boiler causes cracks from the internal injection hole due to thermal stress caused by heating during use, and this crack causes corrosion around the injection hole to progress. As a result, the injection hole expands and the function as a nozzle deteriorates.
すなわち，噴射されるSF6ガスは，極めて安定なガスで
あるが，高温（約600℃以上）ではSF5＋F,SF4＋F2など
に分解し，腐食性を示すようになる。使用中（燃焼中）
の噴射ノズル先端部は，約1000℃の高温ガスに囲まれて
いるので，ノズル先端部を構成するタングステンも外周
はほぼ1000℃に加熱され，SF6ガスが通過する内部（噴
射孔）と外周の温度差に伴う熱応力によって，脆いタン
グステンには噴射孔側（内側）から割れが発生しやす
い。この割れにSF6ガスが浸透すると，浸透したガスは
流れがよどむから，周囲の加熱されたタングステンから
受熱し，高温（約600℃以上）になって熱分解し，腐食
性の激しいガスとなって割れた部分を選択的に腐食し，
さらに噴射孔全体を腐食，拡大してゆく。腐食が進展し
かつ噴射孔が拡大すると，SF6ガスの流速が小さくなっ
てSF6ガスの加熱分解がますます促進され，噴射孔の拡
大が加速されてついにはノズル先端部が破壊するに至
る。That is, the injected SF 6 gas is an extremely stable gas, but it decomposes into SF 5 + F, SF 4 + F 2, etc. at high temperatures (about 600 ° C or higher) and becomes corrosive. In use (burning)
Since the tip of the injection nozzle is surrounded by high-temperature gas of about 1000 ° C, the tungsten that forms the tip of the nozzle is also heated to about 1000 ° C, and SF 6 gas passes through the inside (injection hole) and the outside. Due to the thermal stress associated with the temperature difference, the brittle tungsten tends to crack from the injection hole side (inside). When SF 6 gas permeates into these cracks, the permeated gas stagnates and the heat is received from the surrounding heated tungsten, causing a high temperature (over 600 ° C or higher) to thermally decompose and become a highly corrosive gas. Selectively corrodes the cracked part,
Furthermore, the entire injection hole corrodes and expands. As the corrosion progresses and the injection hole expands, the flow velocity of SF 6 gas decreases and the thermal decomposition of SF 6 gas is further accelerated, and the expansion of the injection hole is accelerated until the tip of the nozzle is destroyed. .
これを防ぐためには，噴射孔に生ずるタングステンの割
れを防止する必要があるが，タングステン棒の強度は極
めて弱く，また高強度のタングステンを製造することは
現状技術では不可能であり，技術開発を行なうにしても
多くの開発費と期間を要するものと思われる。一方，熱
応力などに強いいわゆる高強度の材料をタングステンの
代りに用いることも種々検討され，タングステン合金，
モリブデン合金などにより製作されたノズル先端部のテ
ストも行なわれたが，いずれも耐熱性，耐食性が十分で
なく，耐久性に問題があった。In order to prevent this, it is necessary to prevent the cracking of tungsten that occurs in the injection hole, but the strength of the tungsten rod is extremely weak, and it is impossible to manufacture high-strength tungsten with the current technology. Even if it is done, it seems that a lot of development cost and a long period are required. On the other hand, various studies have been conducted on the use of so-called high-strength materials, which are resistant to thermal stress, in place of tungsten.
A nozzle tip made of molybdenum alloy was also tested, but all had insufficient heat resistance and corrosion resistance, and there was a problem with durability.
本発明は，叙上の状況に鑑み，タングステンに割れが発
生しても，これが直接的に噴孔拡大を誘発しない構造の
水中航走体用エンジンの噴射ノズルとその製造方法を提
供することを目的とする。In view of the above circumstances, the present invention provides an injection nozzle for an underwater vehicle engine having a structure in which even if a crack occurs in tungsten, it does not directly induce the expansion of the injection hole, and a manufacturing method thereof. To aim.
本発明は，前記目的を達成する手段として，軟質金属で
作られ長手方向に沿って貫通孔を有する噴射孔部材と，
耐熱性高融点金属で作られ上記噴射孔部材の外周に接触
してこれを囲むノズル先端部材と，溶接可能な金属で作
られ上記ノズル先端部材の後部に取付けられたノズル本
体とを備えたことを特徴とする水中航走体用エンジンの
噴射ノズル，ならびに軟質金属で作られ長手方向に沿っ
て貫通孔を有する噴射孔材と，耐熱性高融点金属で作ら
れ上記噴射孔材の前部の外周に接触してこれを囲むノズ
ル先端材と，溶接可能な金属で作られ上記噴射孔材の後
部の外周および上記ノズル先端材の外周に接触してこれ
らを囲むノズル本体材とを互いに真空シールした後同時
拡散接合により一体化し，さらに所定形状に機械加工す
ることを特徴とする水中航走体用エンジンの噴射ノズル
の製造方法を提案するものである。The present invention, as a means for achieving the above object, is an injection hole member made of a soft metal and having a through hole along the longitudinal direction,
A nozzle tip member made of a heat-resistant high-melting-point metal that contacts and surrounds the outer periphery of the injection hole member; and a nozzle body made of a weldable metal and attached to the rear portion of the nozzle tip member. An injection nozzle for an underwater vehicle engine, and an injection hole material made of a soft metal and having a through hole along the longitudinal direction, and a front part of the injection hole material made of a heat-resistant refractory metal. A vacuum seal is provided between the nozzle tip material that contacts and surrounds the outer circumference, and the nozzle body material that is made of a weldable metal and that contacts the outer circumference of the rear portion of the injection hole material and the outer circumference of the nozzle tip material that surrounds them. We propose a method for manufacturing an injection nozzle for an underwater vehicle engine, which is characterized by integrating them by simultaneous diffusion bonding and then machining them into a prescribed shape.
本発明の水中航走体用エンジンの噴射ノズルは，前記の
ように噴射孔部が割れの生じにくい軟質金属で構成さ
れ，強度の弱い耐熱性高融点金属にはSF6ガスが直接触
れない構造となっているので，使用中の熱応力によって
ノズル先端部の耐熱性高融点金属に割れが発生しても，
その割れは噴射孔部にまでは進展しない。The injection nozzle of the underwater vehicle engine of the present invention has a structure in which the injection hole portion is made of a soft metal that is unlikely to cause cracks as described above, and SF 6 gas does not directly contact a heat-resistant refractory metal having weak strength. Therefore, even if the heat-resistant refractory metal at the tip of the nozzle cracks due to thermal stress during use,
The crack does not extend to the injection hole portion.
したがって，SF6ガスのよどみはなく，噴射孔内でSF6ガ
スの分解，反応は起らないから，腐食の生成，すなわち
噴射孔の拡大が防止できる。一方，外部に対する耐熱性
は，タングステンのような耐熱性高融点金属により従来
同様維持できる。Therefore, there is no stagnation of SF 6 gas, the decomposition of SF 6 gas in the injection hole, because the reaction does not occur, generation of corrosion, i.e., enlargement of the injection hole can be prevented. On the other hand, the heat resistance to the outside can be maintained as before by using a heat resistant refractory metal such as tungsten.
本発明の実施例を図面を用いて説明する。 Embodiments of the present invention will be described with reference to the drawings.
第１図は本発明の水中航走体用エンジンの噴射ノズルの
一実施例の縦断面図，第２図は同じく取付状態を示す図
である。FIG. 1 is a vertical sectional view of an embodiment of an injection nozzle of an underwater vehicle engine according to the present invention, and FIG. 2 is a view showing the same mounting state.
まず第１図において，（１）は噴射孔部材であって，ニ
ッケル，純鉄等の軟質金属で作られ，長手方向に貫通孔
（噴射孔）（1a）があけられている。（２）はノズル先
端部材であって，タングステンのような耐熱性高融点金
属で作られ，上記噴射孔部材（１）の外周に接触してこ
れを囲むように設けられる。（３）はノズル本体であっ
て,SUS304や軟鋼等の溶接可能な通常の金属で作られ，
上記ノズル先端部材（２）の後部に取付けられている。First, in FIG. 1, (1) is an injection hole member, which is made of a soft metal such as nickel or pure iron and has a through hole (injection hole) (1a) formed in the longitudinal direction. A nozzle tip member (2) is made of a heat-resistant high melting point metal such as tungsten, and is provided so as to contact and surround the outer periphery of the injection hole member (1). (3) is the nozzle body, which is made of weldable normal metal such as SUS304 or mild steel,
It is attached to the rear of the nozzle tip member (2).
次に第２図において，（４）はノズルホルダ，（５）は
導管であって，それぞれａ部,b部において上記ノズル本
体（３）にシール溶接されている。SF6ガスは導管
（５）により供給され，噴射孔（1a）を通ってノズル先
端から燃焼室（図示せず）内に噴射される。Next, in FIG. 2, (4) is a nozzle holder, and (5) is a conduit, which is seal-welded to the nozzle body (3) at the portions a and b, respectively. The SF 6 gas is supplied by the conduit (5) and is injected from the tip of the nozzle into the combustion chamber (not shown) through the injection hole (1a).
次に第３図は，上記第１図に示される噴射ノズルを製造
するための各部材を示す図，第４図はこれら各部材を組
合せた状態を示す図である。Next, FIG. 3 is a view showing each member for manufacturing the injection nozzle shown in FIG. 1, and FIG. 4 is a view showing a state where these members are combined.
まず第３図において，（11）は噴射孔材であって，ニッ
ケル，純鉄等の軟質金属で作られ，長手方向に貫通孔
（11a）が設けられている。（12）はタングステンのよ
うな耐熱性高融点金属で作られたノズル先端材，（13）
はSUS304や軟鋼等の溶接可能な通常の金属で作られたノ
ズル本体材である。First, in FIG. 3, (11) is an injection hole material, which is made of a soft metal such as nickel or pure iron and has a through hole (11a) provided in the longitudinal direction. (12) is a nozzle tip material made of heat-resistant refractory metal such as tungsten, (13)
Is a nozzle body material made of ordinary metal that can be welded such as SUS304 and mild steel.
組立てに際しては，まずノズル先端材（12）をノズル本
体材（13）に挿入し，次に噴射孔材（11）をノズル先端
材（12）とノズル本体材（13）の中心孔に挿入する。そ
うすると第４図に示されるように，ノズル先端材（12）
は噴射孔材（11）の前部の外周に接触してこれを囲む状
態となり，ノズル本体材（13）は噴射孔材（11）の後部
の外周およびノズル先端材（12）の外周に接触してこれ
らを囲む状態となる。At the time of assembly, first, the nozzle tip material (12) is inserted into the nozzle body material (13), and then the injection hole material (11) is inserted into the center holes of the nozzle tip material (12) and the nozzle body material (13). . Then, as shown in Fig. 4, the nozzle tip material (12)
Comes into contact with and surrounds the outer periphery of the front of the injection hole material (11), and the nozzle body material (13) contacts the outer periphery of the rear part of the injection hole material (11) and the outer periphery of the nozzle tip material (12). Then, it becomes a state of surrounding these.
次に噴射孔材（11）とノズル本体材（13）との両端の合
わせ部c,dを電子ビーム溶接によってシール溶接する。
電子ビーム溶接は１×10-5Torr程度の高真空中で行われ
るから，シール溶接後の各部材の合せ部分の小さいすき
間は真空に保持される。その後HIP（Hot Isostatic Pre
ssure）処理装置に入れて高温，高圧を負荷し，所定の
時間保持して同時に各部材を拡散接合する。このHIP処
理条件の一例を述べると，温度1100℃，圧力1000kgf/cm
2，保持時間0.5Hrである。このように,3個の部材は同時
拡散接合により一体化されたのち，機械加工によって第
１図に示されるような噴射ノズルの形状に仕上げられ
る。Next, the joining portions c and d at both ends of the injection hole material (11) and the nozzle body material (13) are seal-welded by electron beam welding.
Since electron beam welding is performed in a high vacuum of about 1 × 10 -5 Torr, the small gaps at the joints of each member after seal welding are maintained in vacuum. After that, HIP (Hot Isostatic Pre
ssure) Put it in a processing device, apply high temperature and high pressure, hold for a predetermined time, and simultaneously perform diffusion bonding of each member. An example of this HIP processing condition is temperature 1100 ℃, pressure 1000kgf / cm.
2 , holding time 0.5Hr. In this way, the three members are integrated by simultaneous diffusion bonding and then machined into the shape of the injection nozzle as shown in FIG.
本実施例の噴射ノズルにおいては，噴射孔部材が純鉄な
どの軟質金属で構成され，かつ，この噴射孔部とタング
ステン等のノズル先端部材とは拡散接合で一体化されて
いるので，タングステンの割れが抑止され，また万一割
れが発生してもSF6ガスがこの割れに浸透することがな
いので，SF6ガスが熱分解し噴射孔部の腐食が進展して
ノズル先端材が破壊するという，従来の噴射ノズルの問
題点が解消する。In the injection nozzle of the present embodiment, the injection hole member is made of a soft metal such as pure iron, and the injection hole portion and the nozzle tip member such as tungsten are integrated by diffusion bonding. cracking is suppressed, also SF 6 gas even chance cracks occurred since no penetrate into the cracks, the nozzle tip material SF 6 gas is progressed corrosion pyrolysis injecting hole is broken That is, the problem of the conventional injection nozzle is solved.
本発明の水中航走体用エンジンの噴射ノズルにおいて
は，使用中のノズル先端部の噴射孔内面の割れ発生が防
止されるとともに，SF6の加熱分解による腐食も防止さ
れ，ノズル先端部の耐久性が向上し，品質が安定化す
る。In the injection nozzle of the underwater vehicle engine of the present invention, cracking of the inner surface of the injection hole at the tip of the nozzle during use is prevented and corrosion due to thermal decomposition of SF 6 is also prevented, resulting in durability of the nozzle tip. Quality is improved and quality is stabilized.
また本発明の製造方法によれば，上記のような噴射ノズ
ルを確実，容易に製造することができる。Further, according to the manufacturing method of the present invention, the above-mentioned injection nozzle can be manufactured reliably and easily.
第１図は本発明の水中航走体用エンジンの噴射ノズルの
一実施例を示す縦断面図，第２図は同じく取付状態を示
す図，第３図は，第１図に示される水中航走体用エンジ
ンの噴射ノズルを製造するための各部材を示す図，第４
図はこれら各部材を組合せた状態を示す図である。第５
図は従来の噴射ノズルの一例を示す縦断面図である。 （１）……噴射孔部材；（1a）……貫通孔（噴射孔）； （02），（２）……ノズル先端部材； （02a）……噴射孔；（03），（３）……ノズル本体； （４）……ノズルホルダ；（５）……導管； （11）……噴射孔材；（11a）……貫通孔； （12）……ノズル先端材； （13）……ノズル本体材； a,b,c,d……シール溶接部。FIG. 1 is a longitudinal sectional view showing an embodiment of an injection nozzle of an underwater vehicle engine of the present invention, FIG. 2 is a view showing the same mounting state, and FIG. 3 is an underwater navigation shown in FIG. FIG. 4 is a diagram showing each member for manufacturing the injection nozzle of the running vehicle engine, FIG.
The figure is a view showing a state in which these respective members are combined. Fifth
The drawing is a vertical sectional view showing an example of a conventional injection nozzle. (1) ...... Injection hole member; (1a) ...... Through hole (injection hole); (02), (2) ...... Nozzle tip member; (02a) ...... Injection hole; (03), (3) ... … Nozzle body; (4) …… Nozzle holder; (5) …… Conduit; (11) …… Injection hole material; (11a) …… Through hole; (12) …… Nozzle tip material; (13) …… Nozzle body material; a, b, c, d ... Seal weld.
Claims (2)
を有する噴射孔部材と，耐熱性高融点金属で作られ上記
噴射孔部材の外周に接触してこれを囲むノズル先端部材
と，溶接可能な金属で作られ上記ノズル先端部材の後部
に取付けられたノズル本体とを備えたことを特徴とする
水中航走体用エンジンの噴射ノズル。1. An injection hole member made of a soft metal and having a through hole along the longitudinal direction, and a nozzle tip member made of a heat-resistant high-melting-point metal and contacting and surrounding the outer periphery of the injection hole member, An injection nozzle for an underwater vehicle engine, comprising a nozzle body made of a weldable metal and attached to a rear portion of the nozzle tip member.
を有する噴射孔材と，耐熱性高融点金属で作られ上記噴
射孔材の前部の外周に接触してこれを囲むノズル先端材
と，溶接可能な金属で作られ上記噴射孔材の後部の外周
および上記ノズル先端材の外周に接触してこれらを囲む
ノズル本体材とを互いに真空シールした後同時拡散接合
により一体化し，さらに所定形状に機械加工することを
特徴とする水中航走体用エンジンの噴射ノズルの製造方
法。2. An injection hole material made of a soft metal and having a through hole along its longitudinal direction, and a nozzle tip made of a heat-resistant refractory metal and in contact with and enclosing the outer periphery of the front part of the injection hole material. Material and the nozzle body material made of weldable metal and contacting the outer periphery of the rear portion of the injection hole material and the outer periphery of the nozzle tip material and surrounding them are vacuum-sealed together and then integrated by simultaneous diffusion bonding. A method of manufacturing an injection nozzle for an underwater vehicle engine, which comprises machining into a predetermined shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3271589A JPH0672691B2 (en) | 1989-02-14 | 1989-02-14 | Injection nozzle for underwater vehicle engine and method of manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3271589A JPH0672691B2 (en) | 1989-02-14 | 1989-02-14 | Injection nozzle for underwater vehicle engine and method of manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02215968A JPH02215968A (en) | 1990-08-28 |
| JPH0672691B2 true JPH0672691B2 (en) | 1994-09-14 |
Family
ID=12366533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3271589A Expired - Lifetime JPH0672691B2 (en) | 1989-02-14 | 1989-02-14 | Injection nozzle for underwater vehicle engine and method of manufacturing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0672691B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19741637A1 (en) * | 1997-09-22 | 1999-03-25 | Asea Brown Boveri | Process for welding hardenable nickel-based alloys |
-
1989
- 1989-02-14 JP JP3271589A patent/JPH0672691B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02215968A (en) | 1990-08-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2158666C2 (en) | Method of manufacturing welded-soldered structure | |
| EP0899449B1 (en) | Rocket engine having a transition attachment between a combustion chamber and an injector | |
| JPH08288095A (en) | Electrode for plasma arc torch | |
| US20230246425A1 (en) | Method for manufacturing an assembly for a spark plug and spark plug | |
| US4348041A (en) | Butt welded tubular structure of austenite stainless steel | |
| JP3023348B2 (en) | Method of manufacturing rocket engine having transition structure between combustion chamber and injector | |
| JP2008304449A (en) | Gas sensor and manufacturing method thereof | |
| JPH0672691B2 (en) | Injection nozzle for underwater vehicle engine and method of manufacturing the same | |
| CN108581139A (en) | A kind of welding method of oil and gas transmission bimetal compound pipeline | |
| US5155326A (en) | Porous materials brazing | |
| RU2220313C2 (en) | Rocket engine chamber housing | |
| US5838094A (en) | Seals and igniters | |
| US6285008B1 (en) | Ignition plug and method of manufacture | |
| JPH08103872A (en) | Method for welding wear resistant composite tube | |
| KR100896560B1 (en) | Stainless steel pipe and flange fixing process | |
| JP2017089948A (en) | Ceramic glow plug | |
| CN117532131B (en) | Rocket engine combustion chamber and manufacturing method thereof | |
| JP2004092449A (en) | Thruster of ballistic vehicle | |
| JPH08129090A (en) | End plug of fuel rod and welding method thereof | |
| JPH0345856A (en) | Manufacture of metallic burner | |
| JPS6396420A (en) | Manufacture of glow plug for diesel engine | |
| JPS5870985A (en) | Joining method for different metals | |
| JPS5820A (en) | Welding of glow tube to fixture for sheath type glow plug | |
| JP3767077B2 (en) | Reactor pressure vessel water supply nozzle safe end replacement method and replacement structure | |
| US3510157A (en) | Seal for hydrogen diffusion apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| EXPY | Cancellation because of completion of term |