JPS5979010A - Manufacture of hollow nozzle blade for turbine diaphragm - Google Patents
Manufacture of hollow nozzle blade for turbine diaphragmInfo
- Publication number
- JPS5979010A JPS5979010A JP18756082A JP18756082A JPS5979010A JP S5979010 A JPS5979010 A JP S5979010A JP 18756082 A JP18756082 A JP 18756082A JP 18756082 A JP18756082 A JP 18756082A JP S5979010 A JPS5979010 A JP S5979010A
- Authority
- JP
- Japan
- Prior art keywords
- back plate
- nozzle blade
- welding
- hollow nozzle
- plate
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D9/00—Stators
- F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明はタービンダイヤフラム用の中空ノズル翼を溶接
作業によって製作する方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a method for manufacturing a hollow nozzle blade for a turbine diaphragm by a welding operation.
従来、蒸気タービンダイヤフラムの最終段近傍に設置さ
れるノズル翼は一般に精密鋳造によって製作されている
が、原価低減及び軽量化を図る為、最近、第１図に示す
ような板金溶接構成の中空ノズル翼が考えられている。Conventionally, the nozzle blades installed near the final stage of the steam turbine diaphragm have generally been manufactured by precision casting, but in order to reduce costs and weight, recently hollow nozzles with a sheet metal welded structure as shown in Figure 1 have been developed. Wings are considered.
このノズル真の形状はタービン効率を上げるため３次元
的に捩れた形状のものが多く用いられている。第１図に
示したＡ−Ａ断面図を第２図に示し、第２図のＢ部の拡
大詳細を第３図に示す。The true shape of this nozzle is often a three-dimensionally twisted shape in order to increase turbine efficiency. FIG. 2 shows a sectional view taken along the line AA shown in FIG. 1, and FIG. 3 shows an enlarged detail of section B in FIG.
このような中空ノズル翼は、従来一般に、予め絞り成形
した腹板１と、背板２とを用い、数枚のリプ３を用いて
溶接構成される。その組立は第２図に示すように背板２
の内側にリプ３を溶接４ａで取り付けた後、上記のリプ
３を腹板１で覆って溶接４を施す。この溶接部４はノズ
ルの蒸気出口側に当たる個所である。そして蒸気入口側
に溶接５を施す。Conventionally, such a hollow nozzle blade is generally constructed using a belly plate 1 and a back plate 2 which are drawn in advance and welded together using several lips 3. Its assembly is as shown in Figure 2.
After attaching the lip 3 to the inside of the rib 3 by welding 4a, the lip 3 is covered with the belly plate 1 and welding 4 is applied. This welded portion 4 is located on the steam outlet side of the nozzle. Then, welding 5 is performed on the steam inlet side.
第４図は前記の腹板４の絞シ成形加工状態を示す。冷却
水人口１０と冷却水出口１１とをそれぞれ備えた上型６
と下型８とによって型水冷式熱間加工によって腹板１が
成形される。７および９はそれぞれ上型６および下型８
の水冷溝、７ａ。FIG. 4 shows the condition of the above-mentioned belly plate 4 being drawn and formed. Upper mold 6 each provided with a cooling water population 10 and a cooling water outlet 11
The belly plate 1 is formed by mold water-cooled hot working using the lower mold 8 and the lower mold 8. 7 and 9 are upper mold 6 and lower mold 8, respectively.
water cooling groove, 7a.
９ａは水冷溝連結口である。9a is a water cooling groove connection port.
第５図は背板２の絞シ成形加工状態を示す。FIG. 5 shows the drawing process of the back plate 2.
１２は上型、１４は下型であシ、１３．１５は水冷溝１
５ａｉｄ水冷連結口である。12 is the upper mold, 14 is the lower mold, 13.15 is the water cooling groove 1
5aid water cooling connection port.
このように絞シ成形した腹板１と背板２とを溶接する際
、第２図に示した蒸気出口側溶接部Ｂの拡大図を＠３図
に示す。この図に示したように、背板１の溶接部の紗に
機械加工で斜の接触面１ａを形成してすみ肉溶接を行な
う。このため、この蒸気出口側の溶接は非常に困難で、
特に背板２と腹板１との位置決めが難かしく、その上、
溶接量も多いので残留応力や残留歪を生じ易く、プロフ
ァイル精度を低下させる。従って、溶接後の歪取シ整形
などに多大の労力と時間とを費し、生産性が阻害される
。When the belly plate 1 and the back plate 2 which have been drawn and formed in this way are welded, an enlarged view of the steam outlet side welding part B shown in FIG. 2 is shown in FIG. 3. As shown in this figure, an oblique contact surface 1a is formed by machining on the gauze of the welded portion of the back plate 1, and fillet welding is performed. For this reason, welding on this steam outlet side is extremely difficult.
In particular, it is difficult to position the back plate 2 and the belly plate 1, and
Since the amount of welding is large, residual stress and strain are likely to occur, reducing profile accuracy. Therefore, a great deal of labor and time is expended on strain relief and shaping after welding, which impedes productivity.
蒸気入口側の溶接部５はギヤツブθ陣の工開先で行なわ
れる。The welding part 5 on the steam inlet side is performed at the opening of the gear tooth θ group.
本発明は上述の事情に鑑みて為され、容易に、高精度で
中空ノズル翼を溶接構成し得るタービンダイヤスラム用
中空ノズル翼の製作方法を提供することを目的とする。The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a method for manufacturing a hollow nozzle blade for a turbine diaphragm, which allows the hollow nozzle blade to be easily and precisely welded.
上記の目的を達成するため、本発明の中空ノズル翼製作
方法は、蒸気出口側の溶接個所の背板側にＶ字状の溝を
形成し、このＶ字状溝に腹板の端縁を当接させて溶接を
施し、溶着金机の節減並びに溶接歪の軽減を可能ならし
めたことを特徴とする。In order to achieve the above object, the hollow nozzle blade manufacturing method of the present invention forms a V-shaped groove on the back plate side of the welded part on the steam outlet side, and inserts the edge of the belly plate into this V-shaped groove. The feature is that welding is carried out in contact with each other, thereby reducing the need for welding metal and reducing welding distortion.
次に本発明の１実施例を第６図乃至第９図について説明
する。Next, one embodiment of the present invention will be described with reference to FIGS. 6 to 9.
第６図は本発明に用いる背板１７にＶ字状の溝を形成す
る方法を示し、従来式の方法における第５図に対応する
図である。従来方法に比して異なるところは、上型１２
に背板のＶ字状溝数シ用の駒１６を取シつけることであ
る。この駒１６付近Ｃ部の拡大図を第７図に示す。FIG. 6 shows a method of forming V-shaped grooves in the back plate 17 used in the present invention, and corresponds to FIG. 5 in the conventional method. The difference from the conventional method is that the upper mold 12
The first step is to attach a piece 16 for the V-shaped groove on the back plate. An enlarged view of section C near this piece 16 is shown in FIG.
このようにして、背板絞シ加工用の上型１２に駒１６を
装着して、背板１７の熱間絞シと同時に該背板１７の端
縁近くにＶ字状の溝１７ａを成形する。In this way, the piece 16 is attached to the upper die 12 for back plate drawing processing, and at the same time as the back plate 17 is hot drawn, a V-shaped groove 17a is formed near the edge of the back plate 17. do.
本実施例においては、上記の絞シ加工を高精度で行うた
め、予め第８図に示すような平駒１８を上型１２に取シ
付けて初回絞シ加工を施し、次いで上記の平駒１８をＶ
溝付絞り用駒１６と交換して仕上絞シ加工を施す。In this embodiment, in order to perform the above-mentioned drawing process with high precision, a flat piece 18 as shown in FIG. 18 to V
Replace it with the grooved drawing piece 16 and perform the finishing drawing process.
このようにして背板１７の、腹板を溶接すべき個所にＶ
字状の溝１７ａを成形し、このＶ字状の溝１７ａに腹板
１の端縁を当接させて溶接を行う。In this way, the V
A groove 17a in the shape of a letter is formed, and the edge of the belly plate 1 is brought into contact with this groove 17a in the shape of a V, and welding is performed.
第９図は上述のようにしてＶ字状の溝を成形した背板１
７を用いて溶接構成した中空ノズル翼の断面を示し、同
図Ｂ部の拡大詳細を第１０図に示す。Figure 9 shows the back plate 1 with V-shaped grooves formed as described above.
Fig. 10 shows a cross section of a hollow nozzle blade constructed by welding using No. 7, and an enlarged detail of section B in the figure is shown in Fig.
従来技術における第３図と本発明の実施例における第１
０図とを対比して容易に理解できるように、本実施例に
おいては腹板１の端縁が７字状溝１７ａで位置決めされ
ているので溶接の精度を出し易い。その上、溶着金属の
所要量が少ないので残留応力や残留歪みを低減させるこ
とができる。Figure 3 in the prior art and Figure 1 in the embodiment of the present invention
As can be easily understood by comparing with Figure 0, in this embodiment, the edge of the belly plate 1 is positioned by the figure-7 groove 17a, making it easy to achieve high welding accuracy. Moreover, since the required amount of weld metal is small, residual stress and residual strain can be reduced.
また、腹板１が背板゛１７の７字状溝１７ａにインロウ
状に嵌合しているので溶接の溶込み不良を発生しに＜＜
、溶接欠陥の発生率を低下させることができる。In addition, since the belly plate 1 fits into the 7-shaped groove 17a of the back plate 17 in a spigot-like manner, poor penetration of welding is prevented.
, the incidence of welding defects can be reduced.
以上説明したように、本発明のタービンダイヤフラム用
中空ノズル翼の製作方法は、背板と腹板との蒸気出口側
の溶接個所の背板側にＶ字状の溝を形成し、このＶ字状
の溝に腹板の端縁を当接せしめて溶接することによシ、
溶着金属を節減して溶接歪および溶接残留応力を軽減す
ることができ、容易に高精度の中空ノズル翼を溶接構成
し得るという優れた実用的効果を奏する。As explained above, in the method of manufacturing a hollow nozzle blade for a turbine diaphragm according to the present invention, a V-shaped groove is formed on the back plate side at the welding point on the steam outlet side between the back plate and the belly plate, and the V-shaped groove is By bringing the edge of the belly plate into contact with the groove and welding,
It is possible to reduce welding distortion and welding residual stress by saving deposited metal, and it is possible to easily construct a high-precision hollow nozzle blade by welding, which is an excellent practical effect.
第１図は中空ノズル翼の斜視図、第２図は従来形の中空
ノズル翼を第１図のＡ−Ａ面で切断した断面図、第３図
は第２図のＢ部を拡大した断面図である。第４図は従来
形の中空ノズル翼を構成する腹板の絞シ加工の説明図、
第５図は同じく背板の絞シ加工の説明図である。第６図
は本発明の中空ノズル翼製作方法の一実施例における背
板の絞シ加工の説明図、第７図は第６図の０部の拡大図
、第８図は初回絞り用の駒の説明用の断面図、第９図は
本発明の一実施例における中空ノズル翼の断面図、第１
０図は第９図のＤ部の拡大図である。
１・・・腹板、２・・・背板、３・・・リプ、４・・・
蒸気出口側の溶接部、訃・・蒸気入口側の溶接部、６・
・・腹板絞シ加工用の上型、７，９，１３．１５・・・
水冷溝、７ ａ、９ａ、１５ａ・・・水冷溝連結口、８
・・・腹板絞シ加工用の下型、１０・・・冷却水入口、
１１・・・冷却水出口、１２・・・背板絞り加工用の上
型、１４・・・背板絞り加工用の下型、１６・・・背板
のＶ字状溝成形用の駒、１７・・・背板、１７ａ・・・
Ｖ字状溝、１８・・・著７Ｂ
Ｄ
般／ｌ） ｆ／Figure 1 is a perspective view of a hollow nozzle blade, Figure 2 is a sectional view of a conventional hollow nozzle blade taken along plane A-A in Figure 1, and Figure 3 is an enlarged cross-section of section B in Figure 2. It is a diagram. Figure 4 is an explanatory diagram of the drawing process of the belly plate that constitutes the conventional hollow nozzle blade;
FIG. 5 is also an explanatory view of the drawing process of the back plate. Fig. 6 is an explanatory diagram of the drawing process of the back plate in one embodiment of the hollow nozzle blade manufacturing method of the present invention, Fig. 7 is an enlarged view of part 0 in Fig. 6, and Fig. 8 is an illustration of the first drawing piece. An explanatory cross-sectional view, FIG. 9 is a cross-sectional view of a hollow nozzle blade in an embodiment of the present invention, and FIG.
Figure 0 is an enlarged view of section D in Figure 9. 1...Abdominal plate, 2...Back plate, 3...Rip, 4...
Welded part on the steam outlet side, butt... Welded part on the steam inlet side, 6.
・・Upper die for processing the belly plate, 7, 9, 13.15...
Water cooling groove, 7a, 9a, 15a... Water cooling groove connection port, 8
...Lower die for belly plate drawing processing, 10...Cooling water inlet,
11... Cooling water outlet, 12... Upper mold for drawing the back plate, 14... Lower die for drawing the back plate, 16... Piece for forming a V-shaped groove on the back plate, 17... Back plate, 17a...
V-shaped groove, 18...7B D general/l) f/
Claims (1)
方法において、上記双方の部材の蒸気出口側の溶接個所
の背板側にＶ字状の溝を形成し、このＶ字状の溝に腹板
の端縁を当接させて溶接して、溶着金属の節減並びに溶
接歪の軽減を可能ならしめたことを特徴とするタービン
・ダイヤフラム用中空ノズル翼の製作方法。1. In a method for manufacturing a hollow nozzle blade consisting of a combination of a back plate and a belly plate, a V-shaped groove is formed on the back plate side at the welded location on the steam outlet side of both members, and this V-shaped groove A method for manufacturing a hollow nozzle blade for a turbine diaphragm, characterized in that the edge of the belly plate is brought into contact with and welded to reduce the amount of welded metal and the welding distortion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18756082A JPS5979010A (en) | 1982-10-27 | 1982-10-27 | Manufacture of hollow nozzle blade for turbine diaphragm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18756082A JPS5979010A (en) | 1982-10-27 | 1982-10-27 | Manufacture of hollow nozzle blade for turbine diaphragm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5979010A true JPS5979010A (en) | 1984-05-08 |
Family
ID=16208215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18756082A Pending JPS5979010A (en) | 1982-10-27 | 1982-10-27 | Manufacture of hollow nozzle blade for turbine diaphragm |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5979010A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04103804A (en) * | 1990-08-23 | 1992-04-06 | Fuji Electric Co Ltd | Pressworking method for back side plate of steam turbine stationary blade |
| KR20040100685A (en) * | 2003-05-23 | 2004-12-02 | 두산중공업 주식회사 | Diaphram Partion for Turbine of Generator and Manufacturing Method Thereof |
-
1982
- 1982-10-27 JP JP18756082A patent/JPS5979010A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04103804A (en) * | 1990-08-23 | 1992-04-06 | Fuji Electric Co Ltd | Pressworking method for back side plate of steam turbine stationary blade |
| KR20040100685A (en) * | 2003-05-23 | 2004-12-02 | 두산중공업 주식회사 | Diaphram Partion for Turbine of Generator and Manufacturing Method Thereof |
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