JPH0429087Y2 - - Google Patents
Info
- Publication number
- JPH0429087Y2 JPH0429087Y2 JP1986057226U JP5722686U JPH0429087Y2 JP H0429087 Y2 JPH0429087 Y2 JP H0429087Y2 JP 1986057226 U JP1986057226 U JP 1986057226U JP 5722686 U JP5722686 U JP 5722686U JP H0429087 Y2 JPH0429087 Y2 JP H0429087Y2
- Authority
- JP
- Japan
- Prior art keywords
- air supply
- runner
- casing
- water
- air
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- 238000011144 upstream manufacturing Methods 0.000 claims description 9
- 238000007664 blowing Methods 0.000 claims description 2
- 230000007423 decrease Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010959 steel 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
この考案は吸出管内水位調整のために水車の下
流側コーナーケーシング上部に給気弁を取付け、
この給気弁より吸出管水位面に向けて空気を吹込
んで水位を調整する貫流水車における水車効率の
低減防止および振動防止に役立つ給気構造に関す
る。
This idea installed an air supply valve on the upper part of the corner casing on the downstream side of the water turbine to adjust the water level in the suction pipe.
The present invention relates to an air supply structure useful for preventing reduction in turbine efficiency and vibration in a once-through water turbine that adjusts the water level by blowing air toward the water level of the suction pipe from this air supply valve.
この種の貫流水車の断面図を第２図に示す。１
は水圧管で、これに水車の上流側ケーシング２お
よび下流側コーナーケーシング３が接続され、さ
らにこれに吸出管４が接続されている。水車のラ
ンナ５は上流側ケーシング２の中に収められ水圧
管１よりの流水により矢印Ｐ方向に回転する。こ
の際下流側コーナーケーシング内部は負圧とな
り、それがため吸出管４の水位は上昇しランナ５
の回転を防げる。これを防ぐため下流側コーナー
ケーシング３の上部に給気弁７を設け、その給気
弁７より空気を吹込む。その際給気弁の開度を調
整し、給気量を調整することによつて吸出管４内
の水位がランナ５の回転を防げないようにかつで
きるだけランナに近い位置に保たれる。そこでラ
ンナ５の中心位置から放水面までの標高差を水車
に働く有効落差の一部として最大限に有効にする
ためランナ５の下端に水面が接触するぎりぎり一
杯まで吸出管５内水位を上昇させた場合、ランナ
回転による影響で水面が攪拌され破線Ｐで示すよ
うな状態となる。その結果ランナ５上流側下部と
ノズル側壁６とで囲まれた空間に水が充満してし
まい、これがため水車効率が低下し、振動が増大
するという欠点があつた。
A cross-sectional view of this type of once-through turbine is shown in Figure 2. 1
is a hydraulic penstock, to which an upstream casing 2 and a downstream corner casing 3 of the water turbine are connected, and to which a suction pipe 4 is further connected. The runner 5 of the water wheel is housed in the upstream casing 2 and rotates in the direction of arrow P by flowing water from the penstock 1. At this time, the inside of the downstream corner casing becomes negative pressure, which causes the water level in the suction pipe 4 to rise and the runner 5
prevents rotation. In order to prevent this, an air supply valve 7 is provided at the upper part of the downstream corner casing 3, and air is blown into the air supply valve 7. At this time, by adjusting the opening degree of the air supply valve and the amount of air supply, the water level in the suction pipe 4 is maintained at a position as close to the runner as possible without preventing rotation of the runner 5. Therefore, in order to maximize the elevation difference from the center position of the runner 5 to the water discharge surface as a part of the effective head acting on the water turbine, the water level in the suction pipe 5 is raised to the limit where the water surface contacts the lower end of the runner 5. In this case, the water surface is agitated due to the influence of the runner rotation, resulting in a state as shown by the broken line P. As a result, the space surrounded by the lower part of the upstream side of the runner 5 and the nozzle side wall 6 is filled with water, resulting in a disadvantage that the efficiency of the water turbine decreases and vibration increases.
この考案は上述した欠点に鑑み、ランナ上流側
下部とノズル側面とで囲まれた空間に水が充満し
ないような構造に改良することを目的とする。
In view of the above-mentioned drawbacks, this invention aims to improve the structure so that the space surrounded by the lower upstream side of the runner and the side surface of the nozzle is not filled with water.
この考案の要点としては、上述した目的を達成
するために上流側ケーシング下部に配置されたノ
ズルから前記空間に空気を吹き込むように構成す
るものである。
The main point of this invention is that air is blown into the space from a nozzle arranged at the lower part of the upstream casing in order to achieve the above-mentioned purpose.
第１図はこの考案の実施例を示すもので、第２
図の場合と同じ構成の部分には同一の符号を付し
説明を省略する。この場合、ノズル６を鋼板溶接
構造とし内部を中空にしてこれを給気室６ａとし
た。ランナ５に面する給気室６ａの側板に複数個
の給気孔６ｂを設け、ノズル６とランナ５に囲ま
れた空間に空気を吹き込むようにした。このノズ
ル６の給気室６ａへは外気に通じる給気配管８を
連通し、空気の取り入れ口には図示しない給気弁
を取り付け、給気量が調整できるようにする。
Figure 1 shows an embodiment of this invention.
Components having the same configuration as those in the figures are given the same reference numerals and explanations will be omitted. In this case, the nozzle 6 had a welded steel plate structure and was hollow inside to serve as the air supply chamber 6a. A plurality of air supply holes 6b are provided in the side plate of the air supply chamber 6a facing the runner 5, so that air is blown into the space surrounded by the nozzle 6 and the runner 5. An air supply pipe 8 communicating with the outside air is connected to the air supply chamber 6a of the nozzle 6, and an air supply valve (not shown) is attached to the air intake port so that the amount of air supply can be adjusted.
この考案によればノズルの給気室の側板に給気
孔を設け、ランナとノズルで囲まれた空間に空気
を吹き込むようにしたので、吸出管内の水位をラ
ンナ下端に接触するまで上昇させた場合でも前記
空間に水が充満することがないので水車効率の低
下および振動を防止することができる。
According to this idea, an air supply hole is provided in the side plate of the air supply chamber of the nozzle, and air is blown into the space surrounded by the runner and nozzle, so that when the water level in the suction pipe rises until it touches the lower end of the runner. However, since the space is not filled with water, a decrease in water turbine efficiency and vibration can be prevented.
第１図はこの考案の実施例を示す貫流水車の断
面図、第２図は従来構造の貫流水車の断面図であ
る。
２……上流側ケーシング、３……下流側コーナ
ーケーシング、４……吸出管、５……ランナ、６
……ノズル、６ａ……給気室、６ｂ……給気孔、
７……給気弁、８……給気配管。
FIG. 1 is a cross-sectional view of a once-through water turbine showing an embodiment of this invention, and FIG. 2 is a cross-sectional view of a once-through water turbine having a conventional structure. 2...Upstream casing, 3...Downstream corner casing, 4...Suction pipe, 5...Runner, 6
... Nozzle, 6a ... Air supply chamber, 6b ... Air supply hole,
7...Air supply valve, 8...Air supply piping.
Claims (1)
グおよび下流側ケーシングを備え、前記下流側ケ
ーシングに連結された吸出管内水位調整のために
前記下流側ケーシング上部に給気弁を取付け、前
記給気弁より下流側ケーシング内に空気を吹き込
んで前記吸出管内の水位を調整するようにした貫
流水車において、前記上流側ケーシングの下部に
前記ランナと対向して設けられたノズル内に給気
室を設け、この吸気室の前記ランナと対向する面
に上流側ケーシング内に通じる給気孔を設けると
ともに前記給気室に外気に通じる給気管を連結し
たことを特徴とする貫流水車の給気構造。 An upstream casing and a downstream casing each housing a once-through runner therein are provided, and an air supply valve is attached to the upper part of the downstream casing for adjusting the water level in the suction pipe connected to the downstream casing, and In a once-through water turbine in which the water level in the suction pipe is adjusted by blowing air into the downstream casing, an air supply chamber is provided in a nozzle provided in a lower part of the upstream casing facing the runner; An air supply structure for a once-through water turbine, characterized in that an air supply hole communicating with the upstream side casing is provided on a surface of the intake chamber facing the runner, and an air supply pipe communicating with outside air is connected to the air supply chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986057226U JPH0429087Y2 (en) | 1986-04-16 | 1986-04-16 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986057226U JPH0429087Y2 (en) | 1986-04-16 | 1986-04-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62169265U JPS62169265U (en) | 1987-10-27 |
| JPH0429087Y2 true JPH0429087Y2 (en) | 1992-07-15 |
Family
ID=30886739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986057226U Expired JPH0429087Y2 (en) | 1986-04-16 | 1986-04-16 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0429087Y2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0723583Y2 (en) * | 1988-03-15 | 1995-05-31 | 株式会社明電舎 | Intake device for once-through turbine |
| JPH0732941Y2 (en) * | 1988-10-12 | 1995-07-31 | 株式会社明電舎 | Intake device for once-through turbine |
| JP2558315Y2 (en) * | 1989-02-20 | 1997-12-24 | 株式会社明電舎 | Once-through water wheel |
| JPH0732942Y2 (en) * | 1989-03-20 | 1995-07-31 | 株式会社明電舎 | Once-through turbine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58186173U (en) * | 1982-06-04 | 1983-12-10 | 株式会社日立製作所 | once-through water turbine |
-
1986
- 1986-04-16 JP JP1986057226U patent/JPH0429087Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62169265U (en) | 1987-10-27 |
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