JPS62165513A - Turbine blade - Google Patents
Turbine bladeInfo
- Publication number
- JPS62165513A JPS62165513A JP775886A JP775886A JPS62165513A JP S62165513 A JPS62165513 A JP S62165513A JP 775886 A JP775886 A JP 775886A JP 775886 A JP775886 A JP 775886A JP S62165513 A JPS62165513 A JP S62165513A
- Authority
- JP
- Japan
- Prior art keywords
- turbine blade
- stellite
- turbine
- steam inlet
- erosion
- 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
- 229910001347 Stellite Inorganic materials 0.000 claims abstract description 19
- AHICWQREWHDHHF-UHFFFAOYSA-N chromium;cobalt;iron;manganese;methane;molybdenum;nickel;silicon;tungsten Chemical compound C.[Si].[Cr].[Mn].[Fe].[Co].[Ni].[Mo].[W] AHICWQREWHDHHF-UHFFFAOYSA-N 0.000 claims abstract description 19
- 230000003628 erosive effect Effects 0.000 claims abstract description 10
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000010936 titanium Substances 0.000 claims abstract description 9
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 9
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 8
- 239000010955 niobium Substances 0.000 claims abstract description 8
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052715 tantalum Inorganic materials 0.000 claims abstract description 8
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 7
- 239000000956 alloy Substances 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 239000010941 cobalt Substances 0.000 abstract description 2
- 229910017052 cobalt Inorganic materials 0.000 abstract description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 abstract description 2
- 150000001875 compounds Chemical class 0.000 abstract 1
- 238000007740 vapor deposition Methods 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 3
- 229910001069 Ti alloy Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 229910000765 intermetallic Inorganic materials 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 241001057981 Puto Species 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910001026 inconel Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
Landscapes
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は蒸気タービンにおけるタービン翼に係り、特に
低圧タービン最終段翼に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a turbine blade in a steam turbine, and particularly to a low pressure turbine final stage blade.
〔発明の技術的背景およびその問題点〕一般に、蒸気タ
ービンプラントにおける低圧タービン側では、高圧ター
ビン側の蒸気条ｆｔに比べて、圧力、温度の低下に伴い
、蒸気湿り度が高まり蒸気中に水滴が存在づる状態にな
る。[Technical background of the invention and its problems] Generally, on the low-pressure turbine side of a steam turbine plant, compared to the steam strip on the high-pressure turbine side, as the pressure and temperature decrease, the steam humidity increases and water droplets are formed in the steam. comes into existence.
しｌ〔がって、このような然気が衝突する低圧最終段羽
根の蒸気入口側では水滴エロージョンが発生し易い。そ
こで、この現象に対処するため、従来低圧タービンの最
終段翼においては、１２Ｏｒ鋼からなる羽根材より耐エ
ロージョン性に優れたＣｏ１１合金のステライト板をス
テライトもしくはインコネル溶接によって最終段翼に装
着することが行なわれている。Therefore, water droplet erosion is likely to occur on the steam inlet side of the low-pressure final stage blade where such natural air collides with the vane. Therefore, in order to deal with this phenomenon, conventionally, in the final stage blade of a low-pressure turbine, a Stellite plate made of Co11 alloy, which has better erosion resistance than the blade material made of 12Or steel, is attached to the last stage blade by Stellite or Inconel welding. is being carried out.
ところで、最終段翼を長尺化することによってタービン
の発電効率は向上するが、翼自身と翼■との間に働らく
遠心力が増すため自ずから１２Ｃｒ鋼では長尺化の限界
がある。最終段翼にＴｉ−６Δ１−４Ｖなどのチタン合
金を使用すると、その比重は１２Ｃｒｍの約６割である
ことから、１２Ｃｒ鋼の限界を越えた長尺化が可能とな
る。Incidentally, by making the final stage blade longer, the power generation efficiency of the turbine is improved, but since the centrifugal force acting between the blade itself and the blade (2) increases, there is a limit to how long the blade can be made longer with 12Cr steel. If a titanium alloy such as Ti-6Δ1-4V is used for the final stage blade, its specific gravity is about 60% of 12Cr, so it becomes possible to make the blade longer than the limit of 12Cr steel.
しかし、チタン合金翼は１２Ｃ１１より優れた耐より一
ジョン性を有するけれども、ステライ１〜に比べるとか
なり劣るため、その速用に当ってはＣｏＭ合金であるス
テライトの取り付けを必要とする。しかしながら、チタ
ン合金とステライトを直接溶接接合したものにおいては
、衝撃力が加わつた場合に境界部から簡単に破断してし
まうため、実用化できない笠の問題がある。However, although the titanium alloy blade has better twisting resistance than 12C11, it is considerably inferior to Stellite 1~, so it is necessary to attach Stellite, which is a CoM alloy, for its rapid use. However, a structure in which titanium alloy and stellite are directly welded has the problem of a cap that cannot be put to practical use because it easily breaks at the boundary when an impact force is applied.
本発明はこのような点に鑑み、接合強度を確保した接合
法によってステライト板を取付けたチタン系合金からな
るタービン翼を得ることを目的どする。In view of these points, it is an object of the present invention to obtain a turbine blade made of a titanium-based alloy to which a stellite plate is attached using a bonding method that ensures bonding strength.
本発明は、チタン系合金からなるタービン翼の少なくと
も蒸気入口側先端縁ｎ１に、耐エロージョン性に優れた
ステライト板をニオブまたはタンタルの中間材を介して
接合したことを特徴とするものであって、チタンおよび
ステライト中のコバルトとの画質との間に脆い金属間化
合物を生成しないニオブまたはタンタルを中間材として
介装することによって、延性のある接合部を右するよう
にしたものである。The present invention is characterized in that a stellite plate with excellent erosion resistance is joined to at least the tip edge n1 on the steam inlet side of a turbine blade made of a titanium-based alloy via an intermediate material of niobium or tantalum. A ductile joint is created by interposing niobium or tantalum, which does not form a brittle intermetallic compound between titanium and cobalt in stellite, as an intermediate material.
（発明の実施例）
以下、添付図面を参照して本発明の一実施例についで説
明する。(Embodiment of the Invention) Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.
第１図において、符９１は熱気タービンにおける最終段
のタービン翼であって、そのタービン翼１の蒸気入口側
先端縁部には、ニオブまたはタンタルの中間材２を介し
てステライ１へ板３がＪＲ合されている。In FIG. 1, reference numeral 91 indicates a turbine blade at the final stage of a hot air turbine, and a plate 3 is connected to the stellite 1 through an intermediate material 2 of niobium or tantalum at the tip edge of the turbine blade 1 on the steam inlet side. JR is combined.
すなわち、タービン翼１の蒸気入口側先端縁部に装着さ
れたステライ１〜板３とニオブまたはタンタルの中間材
２および中間材２とタービン翼１とはそれぞれ第２図に
示すように、エレクトロビーム溶接またはタングステン
イプートガス溶接に」：つて溶着され、一体化されてい
る。That is, as shown in FIG. 2, the Stellite 1 to the plate 3 attached to the tip edge of the turbine blade 1 on the steam inlet side, the intermediate material 2 of niobium or tantalum, and the intermediate material 2 and the turbine blade 1 are connected to each other as shown in FIG. welded or tungsten puto gas welded: welded and integrated.
しかして、ニオブまたはタンタルの中間材を介してステ
ライトとチタンを溶接することにより、ニオブまたはタ
ンタルはステライ］−の主成分であるコバル１〜ともチ
タンとも脆い金属間化合物を生成けず、タービン翼とし
て必要なり１械的性質を有する接合部が１７られる。However, by welding stellite and titanium through an intermediate material of niobium or tantalum, niobium or tantalum does not form brittle intermetallic compounds with cobal 1, which is the main component of stellite, or titanium, and can be used as a turbine blade. If necessary, a joint 17 with mechanical properties is created.
本発明は上述のように１を成したので、チタン系合金製
タービン翼の水滴エロージョン防止のため従来不可能と
されていた耐エロージョン性に優れたステライト板を、
タービン翼の蒸気入口側先端縁部に取付けることができ
、タービン翼の水滴エロージョンに対する耐久性を向上
させることができる。Since the present invention has achieved the above-mentioned features, a stellite plate with excellent erosion resistance, which was previously considered impossible, can be used to prevent water droplet erosion of titanium-based alloy turbine blades.
It can be attached to the tip edge of the turbine blade on the steam inlet side, and can improve the durability of the turbine blade against water droplet erosion.
第１図は本発明のタービン翼の部分側面図、第２図は上
記タービン翼の横断面図である。
１・・・タービン翼、２・・・中間材、３・・・ステラ
イト板。FIG. 1 is a partial side view of a turbine blade of the present invention, and FIG. 2 is a cross-sectional view of the turbine blade. 1...Turbine blade, 2...Intermediate material, 3...Stellite plate.
Claims (1)
側先端縁部に、耐エロージョン性に優れたステライト板
をニオブまたはタンタルの中間材を介して接合したこと
を特徴とするタービン翼。A turbine blade characterized in that a stellite plate with excellent erosion resistance is joined to at least the tip edge on the steam inlet side of a turbine blade made of a titanium-based alloy via an intermediate material of niobium or tantalum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP775886A JPS62165513A (en) | 1986-01-17 | 1986-01-17 | Turbine blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP775886A JPS62165513A (en) | 1986-01-17 | 1986-01-17 | Turbine blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62165513A true JPS62165513A (en) | 1987-07-22 |
Family
ID=11674590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP775886A Pending JPS62165513A (en) | 1986-01-17 | 1986-01-17 | Turbine blade |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62165513A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103061825A (en) * | 2011-10-20 | 2013-04-24 | 株式会社日立制作所 | Turbine blade, turbine rotor using thereof and steam turbine |
-
1986
- 1986-01-17 JP JP775886A patent/JPS62165513A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103061825A (en) * | 2011-10-20 | 2013-04-24 | 株式会社日立制作所 | Turbine blade, turbine rotor using thereof and steam turbine |
| EP2584149A3 (en) * | 2011-10-20 | 2016-07-27 | Mitsubishi Hitachi Power Systems, Ltd. | Turbine blade with erosion shield plate |
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