JPS603500A - Rectifier in volute shape intake passage - Google Patents
Rectifier in volute shape intake passageInfo
- Publication number
- JPS603500A JPS603500A JP11153383A JP11153383A JPS603500A JP S603500 A JPS603500 A JP S603500A JP 11153383 A JP11153383 A JP 11153383A JP 11153383 A JP11153383 A JP 11153383A JP S603500 A JPS603500 A JP S603500A
- Authority
- JP
- Japan
- Prior art keywords
- impeller
- water
- rectifier plate
- uniformly
- prewhirl
- 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
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
【発明の詳細な説明】
／
本発明は羽根車入口部の全周にわたって均一に流水が流
入するようにしたボリュート伏吸込流路の整流装置に関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rectifying device for a volute sub-suction channel that allows flowing water to flow uniformly over the entire circumference of an impeller inlet.
従来、渦巻ポンプのケーシングに形成されているボリュ
ート伏吸込流路では羽根車に流入する流水の制御は吸込
流路の巻始め部分に形成されている舌部の形状を調整し
て行なうのが一般的であった。このため、従来のもので
は吸込口に面した羽根車の前面側に流入する水量が羽根
車の背面側よりも多くなり、羽根車の曲面側でキャビテ
ーションが発生し易くなるという不具合があった。Conventionally, in the volute submerged suction passage formed in the casing of a centrifugal pump, the flow of water flowing into the impeller is generally controlled by adjusting the shape of the tongue formed at the beginning of the suction passage. It was a target. For this reason, in the conventional type, the amount of water flowing into the front side of the impeller facing the suction port is larger than the back side of the impeller, and cavitation tends to occur on the curved side of the impeller.
この不具合は羽根車の一部分に水流が集中するために発
生するのである。This problem occurs because the water flow concentrates on one part of the impeller.
本発明が解決すべき技術的課題は羽根車の全周にわたっ
て均一に水流を案内する点にある。The technical problem to be solved by the present invention is to guide water flow uniformly over the entire circumference of the impeller.
この技術的課題を解決するために講じる技術的手段は、
羽根車に水を流入させるボリュート伏吸込流路を流水の
流入方向に−Ｇって複数部分に分割する整流板を設け、
この整流板の上流側縁部を吸込流路内の予旋回のない一
様流れの位置に配置し、整流板の下流側縁部を羽根車の
入口全周にわたって流水を一様な予旋回をして均一に羽
根車に流入させる曲線伏に形成したものである。The technical measures taken to solve this technical problem are:
A rectifier plate is provided that divides the volute submerged suction channel that causes water to flow into the impeller into a plurality of parts with -G in the flow direction of the flowing water,
The upstream edge of this baffle plate is placed at a position in the suction flow path where the flow is uniform without pre-swirling, and the downstream edge of the baffle plate is positioned to uniformly pre-swirl the flowing water around the entire circumference of the impeller inlet. It is formed into a curved shape that allows the flow to flow uniformly into the impeller.
、・この技術的手段において、整流板は流水の流入方向
に清ってボリュート伏吸込流路を複数部分に分割し、整
流板の下流側縁部は羽根車の入口全周にわたって流水を
一様な予旋回をして均一に羽根車に流入、させる曲線状
に形成したので、羽根車の全周にわたって均一に流水が
流入することになシ、羽根車の一部分の流入量が過大と
なることがなく、キャビテーションが発生することを防
止するのである。,・In this technical means, the baffle plate clears the flowing water in the inflow direction and divides the volute sub-suction channel into multiple parts, and the downstream edge of the baffle plate uniformly distributes the water over the entire circumference of the impeller inlet. Since it is formed in a curved shape that allows water to flow uniformly into the impeller with a pre-swirl, the flow of water does not flow uniformly over the entire circumference of the impeller, and the amount of water flowing into a part of the impeller becomes excessive. This prevents cavitation from occurring.
したがって、前記技術的課題は解決され、羽根車の全周
にわたって均一に水を案内することができる。Therefore, the above technical problem is solved, and water can be guided uniformly over the entire circumference of the impeller.
本発明では整流板の上流側縁部は水流が予旋回をおこさ
ない一様流れである範囲に設けられているので、流量が
変動して過小あるいは過大流量となっても整流板の上流
側縁部からキャビテーションが発生することを防止でき
る。In the present invention, the upstream edge of the current plate is provided in a range where the water flow is a uniform flow without pre-swirling, so even if the flow rate fluctuates and becomes too small or too large, the upstream edge of the current plate It is possible to prevent cavitation from occurring in the area.
以下、第１図を参照して本発明の詳細な説明する。図中
ｌは渦巻ポンプの羽根車であって、この羽根車１は軸２
によって回転自在に軸支されている。この羽根車１はケ
ーシング３内に収容されており、ケーシング３には吸込
口４がら流水を羽根車１に案内するボリュート伏吸込流
路５が形成されている。この吸込流路５の巻始め部分に
は舌部６が形成されており、この舌部６で羽根車ｌに流
入する水流を制御するようになっている。Hereinafter, the present invention will be explained in detail with reference to FIG. In the figure, l is the impeller of the centrifugal pump, and this impeller 1 is connected to the shaft 2.
It is rotatably supported by. The impeller 1 is housed in a casing 3, and the casing 3 has a volute suction passage 5 for guiding flowing water from the suction port 4 to the impeller 1. A tongue portion 6 is formed at the beginning of winding of the suction channel 5, and this tongue portion 6 controls the water flow flowing into the impeller l.
このような吸込流路５を２等分して流水を羽根車ＩＫ案
内する整流板７がケ−ンング３に突設されており、この
整流板７の上流側縁部８は流水が予旋回のない一様流れ
である範囲内に配置されている。また、整流板７の下流
側縁部９は前記舌部６と軸２を中心としてほぼ２１称位
置に、羽根車ｌの全周にわたって流水を均一に流入させ
るような曲線状をなして形成されている。A rectifier plate 7 that divides the suction flow path 5 into two and guides the flowing water to the impeller IK is provided protruding from the caning 3, and the upstream edge 8 of this rectifier plate 7 is designed to prevent the flowing water from pre-circulating. It is located within a range where there is a uniform flow with no turbulence. Further, the downstream edge 9 of the baffle plate 7 is formed in a curved shape approximately at a 21st position with the tongue portion 6 and the shaft 2 as centers, so that the flowing water flows uniformly over the entire circumference of the impeller l. ing.
以上の構成のものでは、吸込口４がら流入した水は整流
板７で２等分され、一方は羽根車１の前面側に流入し他
方は羽根車１の背面側に流入する。このとき、整流板７
の上流側縁部８は □予旋回を発生す閂ｌ囲１りも上流
側“配置銹ておシ、いかなる水量においても上流側縁部
８でキャビテーションが発生することはない。また下流
側縁部９は前述の曲線状に形成されているので前記舌部
６と相まって羽根車ｌの全周にわたって均一に流水を案
内する。In the above configuration, the water flowing in through the suction port 4 is divided into two equal parts by the rectifier plate 7, one of which flows into the front side of the impeller 1 and the other water which flows into the back side of the impeller 1. At this time, the current plate 7
The upstream edge 8 of Since the portion 9 is formed in the aforementioned curved shape, in combination with the tongue portion 6, it guides the flowing water uniformly over the entire circumference of the impeller l.
なお、本発明は以上の実施例に限定されるものではなく
、たとえば第２図に示すように舌部１０、下流側縁部１
１を羽根車１の中心部まで延出させてもよい。また、整
流板は吸込流路を２等分するものに限らず３等分、４等
分等、多等分するものであってもよく、これによって整
流効果を向上させることができる。Note that the present invention is not limited to the above embodiments, and for example, as shown in FIG.
1 may extend to the center of the impeller 1. Further, the current plate is not limited to one that divides the suction flow path into two equal parts, but may be one that divides the suction flow path into multiple equal parts, such as three equal parts, four equal parts, etc., and thereby the rectification effect can be improved.
第１図は本２発明の実施例を示す図で渦巻ポンプの縦断
面図、第２図は本発明の他の実施例を示す縦断面図であ
る。
１・・・羽根車、４・・・吸込口、５・・・ボリュート
伏吸込流路、７・・・整流板、８・・・上流側１陳部、
９・・・下流側縁部。
特許出願人 久保田鉄工株式会社
代理人 鈴江孝−
゛第１ 図
第２図FIG. 1 is a longitudinal cross-sectional view of a centrifugal pump showing a second embodiment of the present invention, and FIG. 2 is a longitudinal cross-sectional view showing another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Impeller, 4... Suction port, 5... Volute submerged suction channel, 7... Straightening plate, 8... Upstream side 1 section,
9...Downstream edge. Patent applicant Takashi Suzue, representative of Kubota Iron Works Co., Ltd. Figure 1 Figure 2
Claims (1)
の流入方向にｉ′酋って複数部分に分割する整流板を設
け、このｋ ｒｌ：ｆｆｉ板の上流側縁部を吸込流路内
の予旋回のない一様流れの位置に配置し、整流板の下流
側縁部を羽根ｒｉの入口全１判にわたって流水を一様な
予旋回をして均一に羽根車に流入させる曲線伏に形成し
たことを特徴とするボリュート伏吸込流路の整流装置。A volute that allows water to flow into the impeller is provided with a rectifying plate that divides the inlet flow path into a plurality of parts by adjusting it in the inflow direction of the flowing water, and the upstream edge of this krl:ffi plate is connected to the suction flow path. The downstream edge of the baffle plate is placed in a position where the flow is uniform without pre-swirling, and the downstream edge of the baffle plate is curved to uniformly pre-swirl the flowing water over the entire length of the inlet of the impeller ri so that it flows uniformly into the impeller. A rectifying device for a volute submerged suction flow path, characterized in that it is formed as follows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11153383A JPS603500A (en) | 1983-06-20 | 1983-06-20 | Rectifier in volute shape intake passage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11153383A JPS603500A (en) | 1983-06-20 | 1983-06-20 | Rectifier in volute shape intake passage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS603500A true JPS603500A (en) | 1985-01-09 |
Family
ID=14563753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11153383A Pending JPS603500A (en) | 1983-06-20 | 1983-06-20 | Rectifier in volute shape intake passage |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS603500A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5083899A (en) * | 1990-04-12 | 1992-01-28 | Geph Enterprises, Inc. | Energy machine |
| JP2005320869A (en) * | 2004-05-06 | 2005-11-17 | Hitachi Industries Co Ltd | Suction casing, suction passage structure and fluid machine |
| US7574862B2 (en) * | 2004-09-22 | 2009-08-18 | Volvo Lastvagnar Ab | Turbo charger unit comprising double entry turbine |
| US20120036849A1 (en) * | 2009-04-20 | 2012-02-16 | Borgwarner Inc. | Simplified variable geometry turbocharger with variable flow volumes |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51142101A (en) * | 1975-06-02 | 1976-12-07 | Hitachi Ltd | Suction casing of centrifugal pump |
-
1983
- 1983-06-20 JP JP11153383A patent/JPS603500A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51142101A (en) * | 1975-06-02 | 1976-12-07 | Hitachi Ltd | Suction casing of centrifugal pump |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5083899A (en) * | 1990-04-12 | 1992-01-28 | Geph Enterprises, Inc. | Energy machine |
| JP2005320869A (en) * | 2004-05-06 | 2005-11-17 | Hitachi Industries Co Ltd | Suction casing, suction passage structure and fluid machine |
| JP4573020B2 (en) * | 2004-05-06 | 2010-11-04 | 株式会社日立プラントテクノロジー | Suction casing, suction flow path structure and fluid machine |
| US7574862B2 (en) * | 2004-09-22 | 2009-08-18 | Volvo Lastvagnar Ab | Turbo charger unit comprising double entry turbine |
| US20120036849A1 (en) * | 2009-04-20 | 2012-02-16 | Borgwarner Inc. | Simplified variable geometry turbocharger with variable flow volumes |
| US8984879B2 (en) * | 2009-04-20 | 2015-03-24 | Borgwarner Inc. | Simplified variable geometry turbocharger with variable flow volumes |
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