JPS58593B2 - Fluid machine suction channel - Google Patents
Fluid machine suction channelInfo
- Publication number
- JPS58593B2 JPS58593B2 JP52085053A JP8505377A JPS58593B2 JP S58593 B2 JPS58593 B2 JP S58593B2 JP 52085053 A JP52085053 A JP 52085053A JP 8505377 A JP8505377 A JP 8505377A JP S58593 B2 JPS58593 B2 JP S58593B2
- Authority
- JP
- Japan
- Prior art keywords
- suction
- guide plate
- impeller
- suction pipe
- fluid machine
- 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
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
【発明の詳細な説明】
この発明はうず巻ポンプ、ディフューザポンプ、ファン
などの吸込流れが軸に対して直角方向から流入する流体
機械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 flow path of a fluid machine such as a centrifugal pump, a diffuser pump, or a fan in which the suction flow enters from a direction perpendicular to the axis.
従来、この種の吸込流路ば第１図に示すようにボリュー
ト状ケーシング１とこのケーシング１に接続する吸込管
３により形成され、前記ケーシング１のボリュート巻終
り部に案内板２が設けられている。Conventionally, this type of suction flow path is formed by a volute-shaped casing 1 and a suction pipe 3 connected to the casing 1, as shown in FIG. 1, and a guide plate 2 is provided at the end of the volute winding of the casing 1. There is.
このような吸込流路６によれば、羽根車軸４に取付けら
れた羽根車５へ流入する流体の流れに予旋回を与え、そ
の流体流れを一様にする効果があることは周知である。It is well known that such a suction flow path 6 has the effect of imparting a pre-swirl to the flow of fluid flowing into the impeller 5 attached to the impeller shaft 4, thereby making the fluid flow uniform.
上記案内板２は第２図に示すように、軸４方向に対しほ
ぼ平行に設けられているため、流体流れは案内板２に衝
突してかく乱され、案内板２の後方に渦が発生する。As shown in FIG. 2, the guide plate 2 is provided almost parallel to the axis 4 direction, so the fluid flow collides with the guide plate 2 and is disturbed, generating a vortex behind the guide plate 2. .
第１図に示すように吸込管３から直ちに羽根車５に流入
する流体流れａと羽根車軸４を一周した流体流れｂは速
度ベクトルに差異があるので、両流体流れａ 、 ｂに
より前記渦は発生して強い渦となり騒音を発生する。As shown in FIG. 1, there is a difference in velocity vector between the fluid flow a that immediately flows into the impeller 5 from the suction pipe 3 and the fluid flow b that has gone around the impeller shaft 4, so the vortex is created by both fluid flows a and b. This generates strong vortices and generates noise.
さらに、羽根車５の羽根が前記渦を通過する際に騒音を
発生するばかりでなく、特にポンプでは渦の中心にキャ
ビテーションを生じ羽根車を腐食させる恐れがある。Furthermore, when the blades of the impeller 5 pass through the vortex, not only noise is generated, but also cavitation may occur at the center of the vortex, particularly in pumps, which may corrode the impeller.
この発明の目的とするところは吸込流路、すなわち吸込
管から直ちに羽根車に流入する流れと羽根車軸を一周し
た流れの速度ベクトル差を小さくし、渦の生起を抑制し
、騒音およびキャビテーションの発生を防止することに
ある。The purpose of this invention is to reduce the velocity vector difference between the flow that immediately flows into the impeller from the suction flow path, that is, the suction pipe, and the flow that has gone around the impeller shaft, suppressing the generation of vortices, and reducing the generation of noise and cavitation. The goal is to prevent
この発明の特徴とするところは羽根車の吸入口部に吸込
管より延びる案内板の、一端を羽根車軸の吸込管側に近
接させ、該一端より前記吸入口部を横切りかつ吸込管を
横切る方向に延在させて吸込流れに対する前記案内板の
後縁を形成したことにある。The feature of this invention is that one end of a guide plate extending from the suction pipe to the suction port of the impeller is placed close to the suction pipe side of the impeller axle, and the guide plate extends from the one end in a direction across the suction port and across the suction pipe. This is because the guide plate extends to form a trailing edge of the guide plate for the suction flow.
以下、この発明の実施例を図面を参照して説明する。Embodiments of the present invention will be described below with reference to the drawings.
第３図はこの発明の吸込流路の一実施例を示す第６図の
ＩＶ−ｆＶ矢視の断面図、第４図は第３図の■−■線に
沿う断面図、第５図は第３図の案内板、部分の拡大図、
第６図はこの発明の吸込流路の一実施例を示す一部断面
斜視図である。3 is a sectional view taken along the line IV-fV in FIG. 6 showing an embodiment of the suction flow path of the present invention, FIG. 4 is a sectional view taken along the line ■-■ in FIG. 3, and FIG. Information board in Figure 3, enlarged view of part,
FIG. 6 is a partially sectional perspective view showing an embodiment of the suction flow path of the present invention.
図において、１はボリュート状に形成されたケーシング
、３は吸込管、４は羽根車軸、５は羽根車、５ａは羽根
車の吸入口部、６はケーシング１および吸込管３により
形成される吸込流路である。In the figure, 1 is a volute-shaped casing, 3 is a suction pipe, 4 is an impeller shaft, 5 is an impeller, 5a is a suction port of the impeller, and 6 is a suction formed by the casing 1 and the suction pipe 3. It is a flow path.
上記ケーシング１のボリュート巻終り部には案内板２が
形成されており、この案内板２は吸込管３より吸入口部
５ａに延び、前記案内板２の一端Ａを羽根車軸４の吸込
管３側に近接させ、この一端Ａより吸入口部５ａを横切
り、かつ吸入管３を横切る方向にボリュート状ケーシン
グ１まで延ばして後縁Ｂを形成している。A guide plate 2 is formed at the end of the volute winding of the casing 1, and this guide plate 2 extends from the suction pipe 3 to the suction port 5a. The rear edge B is formed by extending from one end A to the volute-shaped casing 1 in a direction across the suction port 5a and across the suction pipe 3.
この発明は上記のように構成したので、案内板２の後縁
Ｂでは吸込管３からの流体流れａと、軸４を一周した流
体流れｂの速度ベクトル差を小さくすることができる。Since this invention is configured as described above, the difference in velocity vector between the fluid flow a from the suction pipe 3 and the fluid flow b that goes around the shaft 4 at the trailing edge B of the guide plate 2 can be reduced.
以上説明したように、この発明によればボリュート巻終
り部における吸込管からの流体流れと軸を一周−した流
体流れの方向差を小さくすることができるので、ボリュ
ート巻終り部の後方における流体流れの乱れおよび渦の
生成を抑制し、騒音およびキャビテーション腐食の発生
を防止することができる。As explained above, according to the present invention, it is possible to reduce the difference in direction between the fluid flow from the suction pipe at the end of the volute winding and the fluid flow around the axis, so that the fluid flow behind the end of the volute winding can be reduced. It is possible to suppress the generation of turbulence and vortices, and prevent the occurrence of noise and cavitation corrosion.
第１図は従来の吸込流路を示す断面図、第２図は第１図
の■−■線に沿う断面図、第３図はこの発明の吸込流路
の一実施例を示す第６図のＩＶ−ＩＶ矢視の断面図、第
４図は第３図の■−■線に沿う断面図、第５図は第３図
の案内板部分の拡大図、第６図はこの発明の吸込流路の
一実施例を示す一部断面斜視図である。
１・・・・・・ケーシング、Ｂ・・・・・・案内板後縁
、２・・・・・・案内板、３・・・・・・吸込管、６・
・・・・・吸込流路。Fig. 1 is a sectional view showing a conventional suction flow path, Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 is Fig. 6 showing an embodiment of the suction flow path of the present invention. FIG. 4 is a sectional view along the line ■-■ in FIG. 3, FIG. 5 is an enlarged view of the guide plate portion in FIG. 3, and FIG. FIG. 2 is a partially cross-sectional perspective view showing an example of a flow path. 1... Casing, B... Rear edge of guide plate, 2... Guide plate, 3... Suction pipe, 6...
...Suction flow path.
Claims (1)
込流れに対する案内板となっている流体機械において、
羽根車５の吸入口部に吸込管３より延びる前記案内板２
の一端Ａを羽根車軸４の吸込管３側に近接させ、該一端
Ａより前記吸入口部５ａを横切り、かつ吸込管３を横切
る方向に延在させて吸込流れに対する前記案内板の後縁
を形成したことを特徴とする流体機械の吸込流路。1. In a fluid machine in which the winding end of a volute-shaped suction flow path serves as a guide plate for the suction flow,
The guide plate 2 extends from the suction pipe 3 to the suction port of the impeller 5.
One end A is brought close to the suction pipe 3 side of the impeller shaft 4, and the trailing edge of the guide plate for the suction flow is made to extend from the one end A in a direction across the suction port 5a and across the suction pipe 3. A suction channel for a fluid machine, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52085053A JPS58593B2 (en) | 1977-07-18 | 1977-07-18 | Fluid machine suction channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52085053A JPS58593B2 (en) | 1977-07-18 | 1977-07-18 | Fluid machine suction channel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5420408A JPS5420408A (en) | 1979-02-15 |
| JPS58593B2 true JPS58593B2 (en) | 1983-01-07 |
Family
ID=13847904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP52085053A Expired JPS58593B2 (en) | 1977-07-18 | 1977-07-18 | Fluid machine suction channel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58593B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63199510U (en) * | 1987-06-15 | 1988-12-22 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58592B2 (en) * | 1975-04-25 | 1983-01-07 | 株式会社日立製作所 | Uzumaki Pumpnos Ikomi Yuro |
-
1977
- 1977-07-18 JP JP52085053A patent/JPS58593B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5420408A (en) | 1979-02-15 |
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