JPS5936641Y2 - Rotating machine blades - Google Patents
Rotating machine bladesInfo
- Publication number
- JPS5936641Y2 JPS5936641Y2 JP70980U JP70980U JPS5936641Y2 JP S5936641 Y2 JPS5936641 Y2 JP S5936641Y2 JP 70980 U JP70980 U JP 70980U JP 70980 U JP70980 U JP 70980U JP S5936641 Y2 JPS5936641 Y2 JP S5936641Y2
- Authority
- JP
- Japan
- Prior art keywords
- erosion
- blade
- rotating machine
- dovetail groove
- rotor blade
- 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
Links
Description
【考案の詳細な説明】
本考案は回転機械の動翼の改良、ことにアッシュエロー
ジョン防止型の動翼に関する。[Detailed Description of the Invention] The present invention relates to an improved rotor blade for a rotating machine, and particularly to an ash erosion prevention type rotor blade.
重油焚ボイラに替わり、石炭焚ボイラの使用が、近年再
考されて来た。The use of coal-fired boilers instead of heavy oil-fired boilers has been reconsidered in recent years.
その主要補機としての誘引通風機の動翼はアッシュエロ
ージョンを受け、性能低下が著しかった６その対策とし
て、従来穴のような方法が採用されていた。The rotor blades of the induced draft fan, which is the main auxiliary equipment, suffered from ash erosion, resulting in a significant drop in performance.6 As a countermeasure, conventional methods such as holes were adopted.
（イ）ステライトの肉盛
（ロ）メトコ（ＭＥＴＣＯ）等自溶性合金の溶射、溶融
（ハ）Ｎｂ−Ｃのプラズマアークの溶接
しかし、このような従来法では、肉盛溶接や溶融時に割
れを発生するため予熱や徐冷が必要であった。(b) Overlay of Stellite (b) Thermal spraying of self-fluxing alloys such as METCO, and (c) Welding of Nb-C with plasma arc. Because of this, preheating and slow cooling were necessary.
また肉盛溶接や溶融時に歪みを生じ、翼性能や翼の遠心
強度の低下を誘起する欠点があった。In addition, distortion occurs during overlay welding or melting, resulting in a reduction in blade performance and blade centrifugal strength.
さらにアッシュ・エロージョンを受けた箇所の部分的補
修は、割れを生ずるため困難で、動翼の全体的補修或い
は、動翼の取替えが必要であった。Furthermore, partial repair of areas affected by ash erosion is difficult because cracks occur, requiring either complete repair of the rotor blade or replacement of the rotor blade.
また耐エロージヨン材の施工厚さに限度があり、翼の寿
命を長くする事が不可能であった。Furthermore, there is a limit to the thickness of the erosion-resistant material, making it impossible to extend the life of the blade.
本考案はこのような諸欠点のない、簡便にして廉価なア
ッシュエロージョン防止型動翼を提供することを目的と
する。The object of the present invention is to provide a simple and inexpensive ash erosion-preventing rotor blade that does not have these drawbacks.
すなわち本考案は、翼前縁部を、複数に分割された耐エ
ロージヨン片をありとあり溝との係合により取付けるこ
とにより形成し、このありとあり溝の形状を、回転によ
り翼に作用する遠心力および空気力によって前記耐エロ
ージヨン片が一層喰込むようにこれらの合力方向に先細
としたことを特徴とする、回転機械の動翼に−ある。In other words, in the present invention, the leading edge of the blade is formed by attaching a plurality of divided erosion-resistant pieces by engagement with the dovetail groove, and the shape of the dovetail groove is applied to the blade by rotation. The rotor blade of a rotating machine is characterized in that the erosion-resistant piece is tapered in the direction of the resultant force so that the erosion-resistant piece is further bitten by centrifugal force and aerodynamic force.
以下本考案を添付図面に例示したその静的な実施例につ
いて詳述する。BRIEF DESCRIPTION OF THE DRAWINGS The present invention will now be described in detail with reference to static embodiments illustrated in the accompanying drawings.
第１図に示すように、本考案の実施例においては動翼１
の前縁部を複数の分割着脱式耐エロージヨン片２． ３
． ４． ５で形成せしめである。As shown in FIG. 1, in the embodiment of the present invention, the rotor blade 1
2. The front edge of the is divided into a plurality of removable erosion-resistant pieces. 3
．． 4. 5.
動翼１にはあり溝７を形成し、これに耐エロージヨン片
のあり６を係合せしめて戊るものである。A dovetail groove 7 is formed in the rotor blade 1, and the dovetail groove 7 is engaged with the dovetail groove 7 to form a dovetail groove 7.
第２ａ図および第２ｂ図に詳細に示すように、耐エロー
ジヨン片（たとえば３）のあり６の形状は遠心力の方向
をＸ（第１図）、空気力の方向をＹとするとき、定常運
転時に於けるこれら合力方向である２方向に先細の形状
としである。As shown in detail in Figures 2a and 2b, the shape of the dovetail 6 of the erosion-resistant piece (for example 3) is steady when the direction of centrifugal force is X (Figure 1) and the direction of aerodynamic force is Y. It has a tapered shape in two directions, which are the directions of the resultant force during operation.
すなわち、底面ａｂｄｃは方向Ｙに進むにつれありの深
さが減少する向きに傾斜させである。That is, the bottom surface abdc is inclined such that the depth of the dovetail decreases as it advances in the Y direction.
また面ｂｆｈｄは面ａｅｇｃよりも小面積で、長さｂｄ
は長さａＣよりも小、長さｆｈは長さｅｇよりも小とし
である。Also, the surface bfhd has a smaller area than the surface aegc, and has a length bd
is smaller than the length aC, and the length fh is smaller than the length eg.
また翼１のあり溝７はこのありの形状に対応する形状と
しである。Further, the dovetail groove 7 of the blade 1 has a shape corresponding to this dovetail shape.
この形状のため、運転中に耐エロージヨン片に作用する
遠心力や腹面側より作用する空気力は耐エロージヨン片
を脱落させない方向に有効に作用する。Due to this shape, centrifugal force acting on the erosion-resistant piece during operation and aerodynamic force acting from the ventral side effectively act in a direction to prevent the erosion-resistant piece from falling off.
また、これらの耐エロージヨン片と母体の腹面側に、メ
トコ等のハードコーティングを施工することにより、ス
ライディング摩耗対策を計ると共に、耐エロージヨン片
の脱落防止の２重の安全機構とすることもできる。Furthermore, by applying a hard coating such as Metco to the ventral surface of these erosion-resistant pieces and the base body, it is possible to provide a double safety mechanism that prevents sliding wear and prevents the erosion-resistant pieces from falling off.
第１図は本考案を実施した動翼の斜視図、第２ａ図はひ
とつのエロージョン片の側面図、第２ｂ図はその底面図
、
１・・・・・・翼、２． ３． ４． ５・・・・・・
耐エロージヨン片、６・・・・・・あり。Fig. 1 is a perspective view of a rotor blade implementing the present invention, Fig. 2a is a side view of one erosion piece, and Fig. 2b is a bottom view thereof. 3. 4. 5...
Erosion resistant piece, 6... Yes.
Claims (1)
とあり溝との係合により取付けることにより形成し、こ
のありとあり溝の形状を、回転により翼に作用する遠心
力および空気力によって前記耐エロージヨン片が一層喰
込むようにこれらの合力方向に先細としたことを特徴と
する、回転機械の動翼。The leading edge of the blade is formed by attaching a plurality of divided anti-erosion pieces by engagement with a dovetail groove, and the shape of the dovetail groove is controlled by the centrifugal force and aerodynamic force that act on the blade due to rotation. A rotor blade for a rotating machine, characterized in that the erosion-resistant piece is tapered in the direction of the resultant force so that the erosion-resistant piece bites further.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP70980U JPS5936641Y2 (en) | 1980-01-10 | 1980-01-10 | Rotating machine blades |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP70980U JPS5936641Y2 (en) | 1980-01-10 | 1980-01-10 | Rotating machine blades |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56103604U JPS56103604U (en) | 1981-08-13 |
| JPS5936641Y2 true JPS5936641Y2 (en) | 1984-10-09 |
Family
ID=29597562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP70980U Expired JPS5936641Y2 (en) | 1980-01-10 | 1980-01-10 | Rotating machine blades |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5936641Y2 (en) |
-
1980
- 1980-01-10 JP JP70980U patent/JPS5936641Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56103604U (en) | 1981-08-13 |
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