JPS61108803A - Long blade of steam turbine - Google Patents
Long blade of steam turbineInfo
- Publication number
- JPS61108803A JPS61108803A JP23037384A JP23037384A JPS61108803A JP S61108803 A JPS61108803 A JP S61108803A JP 23037384 A JP23037384 A JP 23037384A JP 23037384 A JP23037384 A JP 23037384A JP S61108803 A JPS61108803 A JP S61108803A
- Authority
- JP
- Japan
- Prior art keywords
- hard material
- long blade
- steam
- blade
- water film
- 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
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
この発明は、特に低圧段における蒸気タービン長翼に関
する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to steam turbine long blades, particularly in the low pressure stage.
従来の技術
蒸気タービン長翼は、特に低圧段において、蒸気が湿シ
蒸気条件にあるので、周速の高い低圧最終翼の翼頂近傍
でドレンが蒸気入口部背面側に衝突して該部分にエロー
ジョンを生起させるから、従来は第５ａおよび５ｂ図に
示すようにクリスマスツリ形翼根１に突設させた長翼の
蒸気入口側の翼先端側を部分的に削除した長翼母材２の
該削除部分３に蒸気ドレンに強いステライト等の硬質材
４を銀ろう付け、あるいは肉盛り溶接等の方法で貼付さ
せることによって（第５ｂ図）、耐エロージヨン性を保
持させている。Conventional technology In long blades of steam turbines, especially in the low-pressure stage, the steam is in a wet steam condition, so condensate collides with the back side of the steam inlet near the blade top of the low-pressure final blade, which has a high circumferential speed, and is damaged by this part. To prevent erosion, conventionally, as shown in FIGS. 5a and 5b, the long blade base material 2 was constructed by partially removing the blade tip side on the steam inlet side of the long blade protruding from the Christmas tree-shaped blade root 1. Erosion resistance is maintained by attaching a hard material 4 such as Stellite, which is resistant to steam drainage, to the removed portion 3 by silver brazing or overlay welding (Fig. 5b).
しかるに、前述した対策を施した従来タービン長翼を定
期検査等の際に点検すると、損傷が顕著に生じていて前
述対策が必ずしも有効でない場合が多い。すなわち、現
在程度の貼付硬質材によっては、蒸気ドレンによる二ロ
ーションが防止されていない。However, when the conventional turbine long blades to which the above-mentioned measures have been taken are inspected during periodic inspections, it is often the case that damage has occurred significantly and the above-mentioned measures are not necessarily effective. That is, the current level of hard adhesive materials do not prevent second lotion from being caused by steam drainage.
発明が解決しようとする問題点
この発明は、蒸気入口側の翼先端部分に硬質材を貼付さ
せた蒸気タービン長翼の耐エロージヨン性を増大させる
ことにある。Problems to be Solved by the Invention The present invention is directed to increasing the erosion resistance of a steam turbine long blade in which a hard material is attached to the tip of the blade on the steam inlet side.
問題点を解決するだめの手段
この発明は、貼付硬質材の表面に適当な大きさの凹凸を
配設させてなるものである。Means for Solving the Problems According to the present invention, irregularities of appropriate size are provided on the surface of the hard material to be applied.
作用
したがって、この発明の構成によれば、貼付硬質材の凹
溝内に蒸気ドレン中に含まれる水滴が貯留して水膜が前
記貼付硬質材の表面に形成され、該水膜に蒸気ドレンが
衝突するので、直接に前記硬質材には激突せずに二ロー
ションの発生、および進展を阻止する。Therefore, according to the configuration of the present invention, water droplets contained in the steam drain are accumulated in the grooves of the hard material to be pasted, and a water film is formed on the surface of the hard material to be pasted, and the water film is filled with steam drain. Since it collides with the hard material, it does not directly collide with the hard material and prevents the generation and progress of the two lotions.
実施例
つぎに、この発明の実施例を図面によって説明すると、
第１図において、貼付硬質材として多数の窪み溝５をも
つハニカム材６を使用するものであり、他の実施例は、
第２図において、貼付硬質材として表面に点形窪み溝７
を多数配設させた点形窪み溝付硬質材８を貼付させるも
のであり、またさらに他の実施例を示す第３図において
は、表面に線状溝９を多条並列した線状溝付硬質材１゜
を貼付使用し、なおさらに他の実施例においては、第４
図に示すように、交叉線状溝１１を表面に布設させた交
叉線状溝付硬質材１２を貼付させてなるものである。Embodiments Next, embodiments of the present invention will be explained with reference to the drawings.
In FIG. 1, a honeycomb material 6 having a large number of grooves 5 is used as the hard material to be attached, and other embodiments are as follows.
In Fig. 2, dotted grooves 7 are formed on the surface as a hard material to be attached.
In FIG. 3 showing another embodiment, a linear grooved hard material 8 with many linear grooves 9 arranged in parallel on the surface is attached. 1° of hard material is applied, and in yet another embodiment, the fourth
As shown in the figure, a hard material 12 with intersecting linear grooves 11 on its surface is pasted thereon.
発明の効果
上述したように、この発明は、ハニカム材６の窪み溝５
、あるいは各硬質材８．１０．１２の夫々の表面の点形
窪み溝７、線状溝９、交叉線状溝１１等凹溝内に水滴が
貯留されて前記各貼付材表面に水膜が形成するために、
蒸気ドレンによる衝突が該水膜を介して行なわれること
になり、各貼付材の耐エロージヨン性が格段に向上させ
られるから、その産業上の利用価値が極めて大きい。Effects of the Invention As described above, the present invention provides the hollow grooves 5 of the honeycomb material 6.
Alternatively, water droplets may be accumulated in concave grooves such as dotted grooves 7, linear grooves 9, and cross-linear grooves 11 on the surface of each hard material 8, 10, and 12, and a water film may be formed on the surface of each adhesive material. In order to form
Collision by steam drainage occurs through the water film, and the erosion resistance of each adhesive material is greatly improved, so its industrial utility value is extremely large.
第１．２．３および４図は、夫々この発明の実施例の各
側を示す斜視図、第５ａ図は、従来の二ローション対策
を施した蒸気タービン長翼の分解してあられした斜視図
、第５ｂ図は、同じく組付は後の斜視図である。
１・・クリスマスツリ形翼根、２・・長翼母材、３・・
蒸気入口側の翼先端削除部分、４・・従来硬質材、５・
・窪み溝、６・・・・ニカム材、７・・点形窪み溝、８
・・回付硬質材、９・・線状溝、１０・・回付硬質材、
１１・・交叉線状溝、１２・・回付硬質材。
復代理人 木 村 正 龜′
（ほか／名゛）
８１ 図 第 ２ 図第３図
第４図
第５α図1.2.3 and 4 are perspective views showing each side of an embodiment of the present invention, and FIG. 5a is an exploded perspective view of a steam turbine long blade with conventional two-lotion measures. , FIG. 5b is a perspective view after assembly. 1. Christmas tree-shaped wing root, 2. Long wing base material, 3.
Removed blade tip on steam inlet side, 4. Conventional hard material, 5.
・Concave groove, 6... Nicum material, 7... Point-shaped concave groove, 8
... Revolving hard material, 9... Linear groove, 10... Revolving hard material,
11... Cross linear groove, 12... Turning hard material. Sub-Agent Tadashi Kimura (other/name) 81 Figure 2 Figure 3 Figure 4 Figure 5α
Claims (1)
イト材の如く凹凸表面を有する部材を貼付した蒸気ター
ビン長翼。A steam turbine long blade in which a member having an uneven surface such as honeycomb material or recessed stellite material is attached to the long blade steam inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23037384A JPS61108803A (en) | 1984-11-02 | 1984-11-02 | Long blade of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23037384A JPS61108803A (en) | 1984-11-02 | 1984-11-02 | Long blade of steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61108803A true JPS61108803A (en) | 1986-05-27 |
Family
ID=16906843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23037384A Pending JPS61108803A (en) | 1984-11-02 | 1984-11-02 | Long blade of steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61108803A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001232444A (en) * | 2000-01-10 | 2001-08-28 | General Electric Co <Ge> | Casting having high heat transfer surface, and mold and pattern for forming the same |
| JP2009052728A (en) * | 2007-08-29 | 2009-03-12 | Denso Corp | Hose for pressure sensor |
-
1984
- 1984-11-02 JP JP23037384A patent/JPS61108803A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001232444A (en) * | 2000-01-10 | 2001-08-28 | General Electric Co <Ge> | Casting having high heat transfer surface, and mold and pattern for forming the same |
| JP2009052728A (en) * | 2007-08-29 | 2009-03-12 | Denso Corp | Hose for pressure sensor |
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