JPH048773U - - Google Patents
Info
- Publication number
- JPH048773U JPH048773U JP1990048566U JP4856690U JPH048773U JP H048773 U JPH048773 U JP H048773U JP 1990048566 U JP1990048566 U JP 1990048566U JP 4856690 U JP4856690 U JP 4856690U JP H048773 U JPH048773 U JP H048773U
- Authority
- JP
- Japan
- Prior art keywords
- water turbine
- turbine runner
- natural frequency
- crown surface
- groove
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
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
- Y02E10/20—Hydro energy
Landscapes
- Hydraulic Turbines (AREA)
Description
第１図は本考案による水車ランナの一例を示す
断面図、第２図は第１図の−線矢視図、第３
図は本考案にしたがつて水車ランナのクラウン面
の最外周部に溝を形成することにより固有振動数
の調整を行う作用を説明するためのランナの固有
振動数と振動振幅の関係を示す図、第４図のａ及
びｂは水車ランナのクラウン面の最外周部に前述
した溝が無い場合（従来例）及び有る場合（本考
案）におけるクラウン面と上カバーとの間の狭あ
い部に生じる流体の振動による圧力分布の比較を
示す図、第５図は前述した溝の幅と固有振動数の
関係を示す図、第６図は従来例による水車ランナ
の固有振動数調整方法を示す図である。
１……ランナ、２……クラウン面、３……バン
ド面、４……ランナベーン、５……溝、６……上
カバー。
Figure 1 is a sectional view showing an example of a water turbine runner according to the present invention, Figure 2 is a view taken along the - line in Figure 1, and Figure 3 is a cross-sectional view showing an example of a water turbine runner according to the present invention.
The figure shows the relationship between the natural frequency of the runner and the vibration amplitude to explain the effect of adjusting the natural frequency by forming grooves on the outermost periphery of the crown surface of the water turbine runner according to the present invention. , a and b in Fig. 4 show the narrow gap between the crown surface and the upper cover when the above-mentioned groove is not provided on the outermost periphery of the crown surface of the water turbine runner (conventional example) and when it is present (this invention). Figure 5 is a diagram showing a comparison of pressure distribution due to generated fluid vibrations, Figure 5 is a diagram showing the relationship between the width of the groove and the natural frequency, and Figure 6 is a diagram showing a conventional method for adjusting the natural frequency of a water turbine runner. It is. 1...Runner, 2...Crown surface, 3...Band surface, 4...Runner vane, 5...Groove, 6...Top cover.
Claims (1)
中固有振動数調整用の溝を円周方向に沿つて形成
したことを特徴とする水車ランナ。 A water turbine runner characterized in that a groove for adjusting an underwater natural frequency is formed along the circumferential direction on the outermost periphery of a crown surface of the water turbine runner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990048566U JPH048773U (en) | 1990-05-11 | 1990-05-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990048566U JPH048773U (en) | 1990-05-11 | 1990-05-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH048773U true JPH048773U (en) | 1992-01-27 |
Family
ID=31565490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990048566U Pending JPH048773U (en) | 1990-05-11 | 1990-05-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH048773U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2022158619A (en) * | 2021-04-02 | 2022-10-17 | 株式会社東芝 | Runner of hydraulic machine and hydraulic machine |
-
1990
- 1990-05-11 JP JP1990048566U patent/JPH048773U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2022158619A (en) * | 2021-04-02 | 2022-10-17 | 株式会社東芝 | Runner of hydraulic machine and hydraulic machine |
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