JPH08128302A - Geothermal turbine rotor - Google Patents
Geothermal turbine rotorInfo
- Publication number
- JPH08128302A JPH08128302A JP26859794A JP26859794A JPH08128302A JP H08128302 A JPH08128302 A JP H08128302A JP 26859794 A JP26859794 A JP 26859794A JP 26859794 A JP26859794 A JP 26859794A JP H08128302 A JPH08128302 A JP H08128302A
- Authority
- JP
- Japan
- Prior art keywords
- turbine rotor
- geothermal turbine
- rotor
- corrosion
- geothermal
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Landscapes
- Turbine Rotor Nozzle Sealing (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はディスクタイプの地熱タ
ービン・ロータの全面防食を図ることができる地熱ター
ビン・ロータに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a geothermal turbine rotor capable of completely protecting a disk type geothermal turbine rotor from corrosion.
【０００２】[0002]
【従来の技術】従来の一般的なディスクタイプの地熱タ
ービン・ロータの構造について図３を参照して説明す
る。図において、ディスクタイプの地熱タービン・ロー
タ１には複数のディスク２が削設されており、同ディス
ク２の外周面には図示していないが、タービン動翼３を
嵌合固設させるための翼溝が周方向或いは、ロータ軸方
向に削成されている。前記ディスク２の厚さや長さ或い
は外径は、同ディスク２の外周側に嵌合固設される動翼
３の大きさによって異なるが、一般的には蒸気の流れに
従って動翼３の形状が大きくなるにしたがってディスク
も厚く形成される。またディスク２のロータ１軸心側付
根のＲコーナ４部は、前記ディスク２間の間隔によりＲ
の大きさも変化して形成される。2. Description of the Related Art The structure of a conventional general disk type geothermal turbine rotor will be described with reference to FIG. In the figure, a disk type geothermal turbine rotor 1 is provided with a plurality of disks 2 cut, and although not shown on the outer peripheral surface of the disk 2, a turbine rotor blade 3 for fitting and fixing is provided. The blade groove is cut in the circumferential direction or in the rotor axial direction. The thickness, length, or outer diameter of the disk 2 varies depending on the size of the moving blade 3 that is fitted and fixed on the outer peripheral side of the disk 2, but generally, the shape of the moving blade 3 is changed according to the flow of steam. The larger the disc, the thicker the disc. Further, the R corner 4 portion at the root of the disc 2 on the axial center side of the rotor 2 is rounded by the space between the discs 2.
The size of is also changed and formed.
【０００３】[0003]
【発明が解決しようとする課題】前記の構成からなる複
数のディスク２を削設した地熱タービン・ロータは地熱
で発生する蒸気を介して回転運動を行い発電機を駆動さ
せるが、地熱で発生する蒸気中にはＳを主にＮａ，Ｃｌ
等の腐食生成元素が含まれており、タービンの起動停止
の繰り返しで、残留蒸気がドレン化し蒸発することによ
ってこれらの成分が濃縮する。このため、タービン・ロ
ータ全面がこれらの濃縮成分により腐食される恐れがあ
った。そこで、本発明はタービン・ロータの腐食が未然
に防止される地熱タービン・ロータの防食構造を提供す
ることにより前記従来の課題を解決しようとするもので
ある。A geothermal turbine rotor having a plurality of disks 2 having the above-mentioned configuration cuts a rotary motion through steam generated by geothermal heat to drive a generator, which is generated by geothermal heat. S is mainly Na and Cl in the steam
Corrosion-producing elements such as the above are included, and these components are concentrated by draining and evaporating the residual steam by repeating start and stop of the turbine. Therefore, the entire surface of the turbine rotor may be corroded by these concentrated components. Therefore, the present invention is intended to solve the above-mentioned conventional problems by providing a corrosion preventing structure for a geothermal turbine rotor in which corrosion of the turbine rotor is prevented in advance.
【０００４】[0004]
【課題を解決するための手段】このため本発明は、外周
側に刻設した翼溝に複数の動翼を嵌合固設するディスク
を複数段設けた地熱タービン・ロータの全面にブラスト
処理を施すと共に、同ブラスト処理た表面にフッ素樹脂
の皮膜を成形し、耐食性能を向上させてなるもので、こ
れを課題解決のための手段とするものである。Therefore, according to the present invention, a blast treatment is performed on the entire surface of a geothermal turbine rotor in which a plurality of stages of disks for fitting and fixing a plurality of moving blades in a blade groove engraved on the outer peripheral side are provided. In addition to being applied, a fluorinated resin film is formed on the blasted surface to improve the corrosion resistance, and this is used as a means for solving the problem.
【０００５】[0005]
【作用】前記の手段によれば、ブラスト処理を施すこと
によりロータ外表面に圧縮応力が残り腐食が進行しやす
い結晶粒界の防食に寄与できる。更にブラスト処理後の
粗い表面にフッ素樹脂を焼成成形させると、ロータ表面
とフッ素樹脂皮膜との界面密着性が良好となる。またフ
ッ素樹脂は腐食生成成分に対して耐久力が極めて強く、
３２５℃の高温でも安定である（地熱の蒸気温度域は２
００℃前後）。このように、本発明の地熱タービン・ロ
ータはブラスト処理による効果と防食皮膜とで二重の腐
食防止が図られ、き裂発生を未然に防止することができ
る。According to the above-mentioned means, it is possible to contribute to the corrosion prevention of the crystal grain boundaries where compressive stress remains on the outer surface of the rotor and corrosion is likely to proceed by performing the blast treatment. Further, when the fluororesin is fired and molded on the rough surface after the blast treatment, the interfacial adhesion between the rotor surface and the fluororesin film becomes good. In addition, fluororesin has extremely strong durability against corrosion-producing components,
Stable even at a high temperature of 325 ℃ (geothermal steam temperature range is 2
(Around 00 ° C). As described above, the geothermal turbine rotor of the present invention has a double effect of the blasting treatment and the anticorrosion coating, so that the corrosion can be prevented from occurring in advance.
【０００６】[0006]
【実施例】以下本発明の実施例を図面について説明する
と、図１は複数段設けられているロータディスクの代表
例の縦断面図であり、図２は図１中のＡ−Ａ矢視断面図
である。図において、地熱タービン・ロータ１には複数
のディスク２が形成されており、更にこのディスク２の
外周にはタービン動翼３が固定されている。そして前記
のような地熱タービン・ロータ１の基本構成は従来例と
同じとなっている。前記のロータ１に削成された複数の
ディスク２を含むタービン・ロータ全面にはブラスト処
理が施され、さらにブラスト加工面５にはフッ素樹脂皮
膜４が焼成成形法で成形される。なお、フッ素樹脂皮膜
成形時にブラスト加工面は図２に示す如く、粗い面とな
るので、この面に成形されたフッ素樹脂は密着性が向上
し、耐久性が良好となる。このように本発明ではタービ
ン・ロータ全面に防食処理が施されるため、タービン・
ロータの腐食を確実に防ぐことができる。Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a vertical cross-sectional view of a typical example of a rotor disk having a plurality of stages, and FIG. 2 is a cross-sectional view taken along the line AA in FIG. It is a figure. In the figure, a geothermal turbine rotor 1 is formed with a plurality of disks 2, and turbine blades 3 are fixed to the outer circumference of the disks 2. The basic configuration of the geothermal turbine rotor 1 as described above is the same as the conventional example. The entire surface of the turbine rotor including the plurality of disks 2 abraded on the rotor 1 is blasted, and the blasted surface 5 is further coated with a fluororesin film 4 by a firing molding method. Since the blasted surface becomes a rough surface during molding of the fluororesin film as shown in FIG. 2, the fluororesin molded on this surface has improved adhesion and good durability. As described above, in the present invention, since the entire surface of the turbine rotor is subjected to the anticorrosion treatment,
Corrosion of the rotor can be reliably prevented.
【０００７】[0007]
【発明の効果】以上詳細に述べた如く本発明によれば、
タービン・ロータ全面にブラスト処理を施すことによ
り、ロータ外表面に圧縮応力が残るので、腐食に伴うき
裂発生を防止できる。フッ素樹脂は摩擦抵抗が小さい
が、ブラスト処理後の粗い表面に成形するので境界み密
着性は向上する。フッ素樹脂の皮膜は腐食生成成分に対
する耐久性が良いので、タービン・ロータは全面腐食環
境から遮断され腐食発生等の問題は生じない。等の優れ
た効果を奏することができる。As described in detail above, according to the present invention,
By blasting the entire surface of the turbine / rotor, compressive stress remains on the outer surface of the rotor, which prevents the occurrence of cracks due to corrosion. Although the fluororesin has a small frictional resistance, since it is molded on the rough surface after the blast treatment, the adhesion at the boundary is improved. Since the fluororesin film has good durability against corrosion-generating components, the turbine rotor is shielded from the general corrosive environment, and problems such as corrosion do not occur. And so on.
【図１】本発明の実施例に係るタービン・ロータの縦断
面図である。FIG. 1 is a vertical cross-sectional view of a turbine rotor according to an embodiment of the present invention.
【図２】第１図Ａ−Ａ矢視断面図である。FIG. 2 is a sectional view taken along the line AA in FIG.
【図３】従来構造を示す縦断面図である。FIG. 3 is a vertical sectional view showing a conventional structure.
１ 地熱タービン・ロータ ２ ディスク ３ 動翼 ４ フッ素樹脂皮膜 ５ ブラスト加工面 1 Geothermal turbine / rotor 2 Disc 3 Blade 4 Fluororesin coating 5 Blasting surface
Claims (1)
合固設するディスクを複数段設けた地熱タービン・ロー
タの全面にブラスト処理を施すと共に、同ブラスト処理
した表面にフッ素樹脂の皮膜を成形し、耐食性能を向上
させたことを特徴とする地熱タービン・ロータ。1. A blast treatment is applied to the entire surface of a geothermal turbine rotor having a plurality of stages of disks in which a plurality of moving blades are fitted and fixed in a blade groove engraved on the outer peripheral side, and fluorine is applied to the surface subjected to the blast treatment. A geothermal turbine rotor characterized by molding a resin film to improve corrosion resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26859794A JPH08128302A (en) | 1994-11-01 | 1994-11-01 | Geothermal turbine rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26859794A JPH08128302A (en) | 1994-11-01 | 1994-11-01 | Geothermal turbine rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08128302A true JPH08128302A (en) | 1996-05-21 |
Family
ID=17460749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26859794A Pending JPH08128302A (en) | 1994-11-01 | 1994-11-01 | Geothermal turbine rotor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08128302A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1331362A2 (en) * | 2002-01-28 | 2003-07-30 | Kabushiki Kaisha Toshiba | Geothermal steam turbine |
| EP1808576A1 (en) * | 2006-01-11 | 2007-07-18 | Siemens Aktiengesellschaft | Turbine shaft for a flow machine |
-
1994
- 1994-11-01 JP JP26859794A patent/JPH08128302A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1331362A2 (en) * | 2002-01-28 | 2003-07-30 | Kabushiki Kaisha Toshiba | Geothermal steam turbine |
| EP1331362A3 (en) * | 2002-01-28 | 2003-12-17 | Kabushiki Kaisha Toshiba | Geothermal steam turbine |
| EP1803898A2 (en) * | 2002-01-28 | 2007-07-04 | Kabushiki Kaisha Toshiba | Geothermal turbine |
| EP1803898A3 (en) * | 2002-01-28 | 2012-01-04 | Kabushiki Kaisha Toshiba | Geothermal turbine |
| EP1808576A1 (en) * | 2006-01-11 | 2007-07-18 | Siemens Aktiengesellschaft | Turbine shaft for a flow machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20010327 |