JPS5932679B2 - Suction channel of a centrifugal pump - Google Patents
Suction channel of a centrifugal pumpInfo
- Publication number
- JPS5932679B2 JPS5932679B2 JP10988877A JP10988877A JPS5932679B2 JP S5932679 B2 JPS5932679 B2 JP S5932679B2 JP 10988877 A JP10988877 A JP 10988877A JP 10988877 A JP10988877 A JP 10988877A JP S5932679 B2 JPS5932679 B2 JP S5932679B2
- Authority
- JP
- Japan
- Prior art keywords
- baffle
- flow
- centrifugal pump
- suction channel
- suction
- 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
【発明の詳細な説明】
この発明は両吸込うず巻ポンプの吸込流路に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a suction channel for a double suction centrifugal pump.
従来、両吸込うず巻ポンプの吸込流路は第１図〜第３図
に示す如く、ボリュート状に形成されている。Conventionally, the suction flow path of a double suction centrifugal pump is formed in a volute shape, as shown in FIGS. 1 to 3.
このボリュート状の吸込流路１は車軸２に取付けられた
羽根車３に流入する流れに予旋回を与え、羽根車３０入
口（目玉部）４に向かって流れを矢印の如く周方向に一
様にする。This volute-shaped suction flow path 1 gives a pre-swirl to the flow flowing into the impeller 3 attached to the axle 2, and makes the flow uniform in the circumferential direction toward the impeller 30 inlet (center part) 4 as shown by the arrow. Make it.
しかし、予旋回が過大になると、羽根車入口（目玉部）
４における流速および周方向の速度成分が増大するため
に、キャビテーション性能や全揚程が低下する。However, if the pre-swing becomes excessive, the impeller inlet (center part)
4, the flow velocity and the velocity component in the circumferential direction increase, resulting in a decrease in cavitation performance and total head.
これを防止するために、ボリュート状吸込流路１０巻き
終り端には予旋回量を適度に制御するバッフル５が設け
られている。In order to prevent this, a baffle 5 is provided at the end of the winding of the volute-shaped suction channel 10 to appropriately control the amount of pre-swirling.
上記バッフル５は旋回しようとする流れを塞止める機能
を有しているから、第４図（第１図のバッフル付近の拡
大図）に示す如く、バッフル５の腹面ａと背面すとの間
に圧力差を生ずる。Since the baffle 5 has the function of blocking the flow that tries to turn, as shown in FIG. 4 (an enlarged view of the vicinity of the baffle in FIG. 1), there is a Creates a pressure difference.
通常、腹面ａ側の方が背面す側より圧力が高くなり、バ
ッフル５の背後には腹面ａ側の流れが、背面す側に回り
込み両者の流れが合流して流れる。Normally, the pressure on the ventral surface a side is higher than that on the back side, and behind the baffle 5, the flow on the ventral surface a side wraps around to the back surface side and the two flows merge.
ところが、第２図に示す如く、腹面ａ側の流れの速度ベ
クトルｖａ と背面す側の速度ベクトルｖｂは異なる
ため、バッフル５背後の流れには第４図、第５図に示す
如く、局所的に低圧部が存在する非常に乱れた流れ６を
生ずる。However, as shown in FIG. 2, since the velocity vector va of the flow on the ventral surface a side and the velocity vector vb of the flow on the back side are different, the flow behind the baffle 5 has a local flow as shown in FIGS. This results in a highly turbulent flow 6 in which there are low pressure areas.
このように非常に乱れた流れ６０発生はポンプに振動、
騒音およびキャビテーションの発生をもたらす問題があ
った。This generation of highly turbulent flow 60 causes vibrations in the pump,
There were problems resulting in noise and cavitation.
この発明は羽根車に流入する流れを一様に、かつ乱れの
少ない流れにし、振動、騒音およびキャビテーションの
発生を軽減させることを目的とするもので、バッフルの
表面に案内羽根あるいは案内溝を設けて、バッフルの腹
面と背面を流通する流れの方向を合致させるようになし
たものである。The purpose of this invention is to make the flow flowing into the impeller uniform and with little turbulence, and to reduce the occurrence of vibration, noise, and cavitation. Guide vanes or guide grooves are provided on the surface of the baffle. The direction of the flow flowing through the ventral surface and the back surface of the baffle is made to match.
以下、この発明の実施例を第６図〜第８図について説明
する。Embodiments of the present invention will be described below with reference to FIGS. 6 to 8.
第６図、第１図において、バッフル５の背面す側には流
れの速度ベクトルｖｂが腹面ａ側の速度ベクトルｖａと
合致するように複数の案内羽根Ｉが傾斜して取付けられ
ている。In FIGS. 6 and 1, a plurality of guide vanes I are installed at an angle on the back side of the baffle 5 so that the velocity vector vb of the flow matches the velocity vector va on the ventral side a.
第８図はこの発明の他の実施例を示すもので、上記案内
羽根７０代りに案内溝８をバッフル５の背面す側に設け
たものである。FIG. 8 shows another embodiment of the present invention, in which a guide groove 8 is provided on the back side of the baffle 5 instead of the guide blade 70 described above.
この発明は上記の如く構成されているから、バッフル５
の背面に沿って羽根車入口（目玉部）４に流入する流れ
の速度ベクトルｖｂとボリュート状流路を一巡してバッ
フル５の腹面により塞止められ羽根車人口４に流入する
流れの速度ベクトルｖａの方向は合致する。Since this invention is constructed as described above, the baffle 5
The velocity vector vb of the flow flowing into the impeller inlet (center part) 4 along the back surface of the volute, and the velocity vector va of the flow flowing around the volute-shaped channel, blocked by the ventral surface of the baffle 5, and flowing into the impeller population 4. The directions of match.
したがって、速度ベクトルｖａ°とｖｂの不一致によっ
て生ずるバッフル５背後の乱れた流れを皆無にすること
ができる。Therefore, the turbulent flow behind the baffle 5 caused by the mismatch between the velocity vectors va° and vb can be completely eliminated.
以上説明したように、この発明によればバッフル表面に
案内羽根あるいは案内溝を設けて、パツフルの腹面と背
面を流通する流れの方向を合致させるようにしたから、
バッフル背後で生ずる非常に乱れた流れを排除でき、一
様、かつ適度な予旋回の流体の流れを羽根車に与えるこ
とができる。As explained above, according to the present invention, guide vanes or guide grooves are provided on the baffle surface to match the direction of the flow flowing between the ventral surface and the back surface of the baffle.
The highly turbulent flow that occurs behind the baffle can be eliminated, and a uniform and moderately pre-swirled fluid flow can be provided to the impeller.
また、キャビテーション性能の向上およびポンプの振動
、騒音の低減をはかることができる。Furthermore, it is possible to improve cavitation performance and reduce pump vibration and noise.
第１図は従来のうず巻ポンプにおける吸込流路を説明す
る断面正面図、第２図は第１図のｌ−Ｉ線に沿う断面図
、第３図は第１図の■−■線に沿う断面図、第４図、第
５図は第１図のバッフル付近の詳細図、第６図〜第８図
はこの発明のうず巻ポンプの吸込流路を説明する図で、
第６図、第７図はバッフルに案内羽根を取付けた場合を
説明する図、第８図はバッフルに案内溝を設けた場合を
説明する図である。
１・・・吸込流路、３・・・羽根車、４・・・羽根車入
口（目玉部）、５・・・バッフル、６・・・乱れた流れ
、７・・・案内羽根、８・・・案内溝。Figure 1 is a cross-sectional front view illustrating the suction flow path in a conventional centrifugal pump, Figure 2 is a cross-sectional view taken along the l-I line in Figure 1, and Figure 3 is a cross-sectional view taken along the line ■-■ in Figure 1. 4 and 5 are detailed views of the vicinity of the baffle in FIG. 1, and FIGS. 6 to 8 are diagrams illustrating the suction flow path of the centrifugal pump of the present invention,
FIGS. 6 and 7 are diagrams for explaining the case in which guide vanes are attached to the baffle, and FIG. 8 is a diagram for explaining the case in which guide grooves are provided in the baffle. DESCRIPTION OF SYMBOLS 1... Suction channel, 3... Impeller, 4... Impeller inlet (center part), 5... Baffle, 6... Turbulent flow, 7... Guide vane, 8...・Guide groove.
Claims (1)
フルを設けたうず巻ポンプにおいて、前記バッフルの表
面に案内羽根あるいは案内溝を設けて、前記バッフルの
腹面と背面を流通する流れの方向を合致させるようにな
したことを特徴とするうず巻ポンプの吸込流路。1. In a centrifugal pump in which a baffle is provided at the end of a suction channel formed in a volute shape, guide vanes or guide grooves are provided on the surface of the baffle to direct the direction of flow flowing between the ventral surface and the back surface of the baffle. A suction flow path of a centrifugal pump, characterized in that the suction flow path is made to match.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10988877A JPS5932679B2 (en) | 1977-09-14 | 1977-09-14 | Suction channel of a centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10988877A JPS5932679B2 (en) | 1977-09-14 | 1977-09-14 | Suction channel of a centrifugal pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5444204A JPS5444204A (en) | 1979-04-07 |
| JPS5932679B2 true JPS5932679B2 (en) | 1984-08-10 |
Family
ID=14521694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10988877A Expired JPS5932679B2 (en) | 1977-09-14 | 1977-09-14 | Suction channel of a centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5932679B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0561497U (en) * | 1992-01-31 | 1993-08-13 | 三菱マテリアル株式会社 | Fluid booster with sleeve |
-
1977
- 1977-09-14 JP JP10988877A patent/JPS5932679B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5444204A (en) | 1979-04-07 |
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