JP3169176B2 - Resin diffuser - Google Patents
Resin diffuserInfo
- Publication number
- JP3169176B2 JP3169176B2 JP28438497A JP28438497A JP3169176B2 JP 3169176 B2 JP3169176 B2 JP 3169176B2 JP 28438497 A JP28438497 A JP 28438497A JP 28438497 A JP28438497 A JP 28438497A JP 3169176 B2 JP3169176 B2 JP 3169176B2
- Authority
- JP
- Japan
- Prior art keywords
- diffuser
- side plate
- resin
- flow path
- tenon
- 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 - Fee Related
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、多段ポンプ等に使
用されて、羽根車で昇圧された流体を効率良く回収する
流路を形成する樹脂製ディフューザに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin diffuser which is used in a multi-stage pump or the like and forms a flow path for efficiently recovering a fluid pressurized by an impeller.
【０００２】[0002]
【従来の技術】多段ポンプにあっては、羽根車で昇圧さ
れた流体を効率良く回収するため、羽根車の周囲をディ
フューザで囲繞し、このディフューザで流体の流路を形
成することが広く行われている。2. Description of the Related Art In a multi-stage pump, in order to efficiently recover fluid pressurized by an impeller, it is widely practiced to surround the periphery of the impeller with a diffuser and form a fluid flow path with the diffuser. Have been
【０００３】従来、複雑な流路を形成するディフューザ
にあっては、図５に示すように、樹脂製のディフューザ
本体１とプレス成形された金属製の側板２とを組み合わ
せてディフューザ３を構成することが広く行われてい
た。即ち、所定の形状にプレス成形した金属製側板２を
ポンプケーシング内に配置された中間ケーシング４に溶
接して接続した後、この金属製側板２内に所定の形状に
樹脂で一体成形したディフューザ本体１を挟み込んで固
定することが広く行われていた。Conventionally, in a diffuser which forms a complicated flow path, as shown in FIG. 5, a diffuser 3 is formed by combining a resin diffuser main body 1 and a press-formed metal side plate 2. That was widely done. That is, a metal side plate 2 press-formed into a predetermined shape is welded and connected to an intermediate casing 4 disposed in a pump casing, and then a diffuser body integrally formed with a resin into the metal side plate 2 into a predetermined shape. It has been widely practiced to hold and fix 1.
【０００４】このように、樹脂製のディフューザ本体１
と金属製の側板２とを組み合わせて複雑な流路のディフ
ューザ３を構成しているのは、複雑な流路を有するディ
フューザを樹脂により一体成形しようとすると、単純な
樹脂成形を行うことができず、いわゆる中子に相当する
部分を低溶融点金属で製作する必要があり、製品単価が
かえって高価になってしまうからである。As described above, the diffuser body 1 made of resin is used.
And the metal side plate 2 are combined to form the diffuser 3 having a complicated flow path. When the diffuser having the complicated flow path is to be integrally molded with resin, simple resin molding can be performed. In other words, it is necessary to manufacture a portion corresponding to a so-called core with a low melting point metal, and the product unit price is rather expensive.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上記従
来例のように、ディフューザ流路形成側面を有しプレス
成形で製作した金属製の側板を樹脂製のディフューザ本
体と別体に備え、この側板を中間ケーシングに溶接によ
り接続すると、この溶接作業がかなり面倒であるばかり
でなく、ディフューザ自体がかなり高価なものとなって
しまうという問題があった。However, as in the above-described conventional example, a metal side plate having a diffuser channel forming side surface and manufactured by press molding is provided separately from a resin diffuser body, and this side plate is provided. When connected to the intermediate casing by welding, there is a problem that not only is the welding operation considerably troublesome, but also the diffuser itself becomes considerably expensive.
【０００６】なお、共に樹脂製のディフューザ本体と側
板とを互いに接着剤等で接合させて複雑な流路を有する
ディフューザを構成することも考えられるが、樹脂材料
として、分子結合、即ち対薬品性に優れた材料を使用す
ると、接着による結合が困難で信頼性に欠けてしまう。Incidentally, it is conceivable to form a diffuser having a complicated flow path by bonding a diffuser body and a side plate, both made of resin, to each other with an adhesive or the like. When a material excellent in quality is used, bonding by bonding is difficult and lacks reliability.
【０００７】本発明は上記事情に鑑みて為されたもの
で、より低価格で信頼性の高い流路を形成できるように
した樹脂製ディフューザを提供することを目的とする。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a resin diffuser which can form a highly reliable flow path at a lower cost.
【０００８】[0008]
【課題を解決するための手段】本発明の樹脂製ディフュ
ーザは、共に樹脂製のディフューザ本体と側板とからな
り、前記ディフューザ本体の流路形成部以外の部分でデ
ィフューザ基礎円と同じ中心を持つ円周上に該円周方向
に沿って該ディフューザの内部を延びる嵌着部を有する
ほぞ穴を設けるとともに、前記側板の流路形成部で該側
板の円周と同じ中心を持つ円周上に該円周方向に沿って
延びる楔状部を有するほぞを前記ほぞ穴に嵌合自在に設
けたことを特徴とする。The resin diffuser of the present invention comprises a resin diffuser body and a side plate, both of which are made of resin, and have a circle having the same center as the diffuser base circle in a portion other than the flow path forming portion of the diffuser body. A mortise having a fitting portion extending inside the diffuser along the circumferential direction is provided on the circumference, and the mortise is formed on the circumference having the same center as the circumference of the side plate in the flow path forming portion of the side plate. A tenon having a wedge-shaped portion extending along the circumferential direction is provided so as to be fitted into the tenon.
【０００９】これにより、ディフューザ本体と側板を共
に単純な樹脂材料で成形し両者を組み合わせることで複
雑な流路を有するディフューザを構成するとともに、デ
ィフューザ本体に設けたほぞ穴内に側板に設けたほぞを
嵌め込み、側板を円周方向に回転させてほぞの楔状部を
ほぞ穴の嵌着部に食い込ませて、接着剤を使用すること
なく、側板をディフューザ本体に確実に固定し、締め付
けが完了することができる。Thus, the diffuser body and the side plate are both formed of a simple resin material, and the two are combined to form a diffuser having a complicated flow path, and the tenon provided on the side plate in the mortise hole provided in the diffuser body. Inserting, rotating the side plate in the circumferential direction to make the mortise wedge-shaped part bite into the mortise hole fitting part, securely fixing the side plate to the diffuser body without using adhesive, and completing the tightening Can be.
【００１０】[0010]
【発明の実施の形態】以下、本発明の実施の形態を図１
乃至図４を参照して説明する。この実施の形態のディフ
ューザ１０は、共に対薬品性に優れた樹脂製のディフュ
ーザ本体１１と略円板状の側板１２とに分割され、両者
１１，１２を組み合わせることによって構成されてい
る。即ち、ディフューザ本体１１及び側板１２は、共に
樹脂成形が比較的容易な形状の樹脂成形品で構成され、
このように２つの樹脂成形品（ディフューザ本体１１及
び側板１２）を組み合わせて、一体成形が難しい流路形
状を有するディフューザ１０を構成するようになってい
る。FIG. 1 is a block diagram showing an embodiment of the present invention.
This will be described with reference to FIGS. The diffuser 10 of this embodiment is divided into a resin diffuser body 11 and a substantially disk-shaped side plate 12 both of which are excellent in chemical resistance, and is configured by combining the two. That is, the diffuser body 11 and the side plate 12 are both formed of a resin molded product having a relatively easy resin molding shape,
In this way, by combining the two resin molded products (the diffuser body 11 and the side plate 12), the diffuser 10 having a flow path shape that is difficult to integrally mold is configured.
【００１１】前記ディフューザ本体１１には、この流路
形成部以外の端面のディフューザ基礎円と同じ中心をも
つ円周上に位置して、該端面側に開口する開口部１３ａ
とディフューザ本体１１の内部を前記円周方向に沿って
延びる嵌着部１３ｂとを有するＬ字状のほぞ穴１３が設
けられている。The diffuser main body 11 has an opening 13a which is located on a circumference having the same center as the diffuser base circle on the end face other than the flow path forming portion, and which opens to the end face side.
An L-shaped mortise 13 having a fitting portion 13b extending along the circumferential direction inside the diffuser body 11 is provided.
【００１２】一方、前記略円板状の側板１２には、この
流路形成部の端面の該側板１２の円周と同じ中心を持つ
円周上に位置して、該端面から突出する立上り部１４ａ
とこの立上り部１４ａの先端から前記円周方向に沿って
延びる楔状部１４ｂを有するＬ字状のほぞ１４が設けら
れている。On the other hand, the substantially disk-shaped side plate 12 is provided with a rising portion which is located on an end face of the flow path forming portion on a circumference having the same center as the circumference of the side plate 12, and protrudes from the end face. 14a
And an L-shaped tenon 14 having a wedge-shaped portion 14b extending in the circumferential direction from the tip of the rising portion 14a.
【００１３】ここに、前記ほぞ穴１３及びほぞ１４は、
前記両円周の径が等しく設定されて、互いに対向する位
置に設けられているとともに、このほぞ穴１３の開口部
１３ａは、ほぞ１４の外形より僅かに大きく形成されて
いる。そして、前記ほぞ１４の楔状部１４ｂは、ほぞ穴
１３の嵌着部１３ｂ内に位置した時、この嵌着部１３ｂ
に食い込んでその脱出が防止されるようになっている。Here, the mortise 13 and tenon 14 are
The diameters of the two circumferences are set to be equal to each other and provided at positions facing each other, and the opening 13 a of the mortise 13 is formed slightly larger than the outer shape of the tenon 14. When the wedge-shaped portion 14b of the tenon 14 is located within the fitting portion 13b of the tenon hole 13, the fitting portion 13b
The escape is prevented by digging into.
【００１４】つまり、前記嵌着部１３ｂには、円周方向
に沿って肉厚内方に傾斜するテーパ面１３ｃが、楔状部
１４ｂには、円周方向に沿って徐々に薄肉となるテーパ
面１４ｃがそれぞれ設けられ、ほぞ１４の楔状部１４ｂ
がほぞ穴１３の嵌着部１３ｂ内に位置した時、両テーパ
面１３ｃ，１４ｃが互いに接触し固定するように構成さ
れている。That is, the fitting portion 13b has a tapered surface 13c which is thick in the circumferential direction and is inclined inwardly, and the wedge-shaped portion 14b has a tapered surface which gradually becomes thinner in the circumferential direction. 14c are provided, and the wedge-shaped portion 14b of the tenon 14 is provided.
When it is located in the fitting portion 13b of the mortise 13, the two tapered surfaces 13c and 14c are configured to contact and fix each other.
【００１５】これにより、先ず図２に示すように、ディ
フューザ本体１１に設けたほぞ穴１３内に側板１２に設
けたほぞ１４を嵌め込み、しかる後、図３に示すよう
に、側板１２を円周方向に回転させてほぞ１４の楔状部
１４ｂをほぞ穴１３の嵌着部１３ｂに食い込ませ、これ
によって、接着剤を使用することなく、側板１２をディ
フューザ本体１１に確実に固定してディフューザ１０を
構成することができるようになっている。As a result, first, as shown in FIG. 2, the tenon 14 provided on the side plate 12 is fitted into a tenon hole 13 provided in the diffuser main body 11, and thereafter, as shown in FIG. And the wedge-shaped portion 14b of the tenon 14 bites into the fitting portion 13b of the mortise hole 13, whereby the side plate 12 is securely fixed to the diffuser body 11 without using an adhesive, thereby fixing the diffuser 10. It can be configured.
【００１６】次に、前記ディフューザ１０を２段ポンプ
に使用した時の例を図４を参照して説明する。Next, an example in which the diffuser 10 is used for a two-stage pump will be described with reference to FIG.
【００１７】同図に示すように、主軸２０に固着した各
羽根車２１の周囲を囲繞するようにして、ポンプケーシ
ング２２の内部に配置された中間ケーシング２３で前記
ディフューザ本体１１と側板１２とを一体化したディフ
ューザ１０を狭持して固定するのであり、これにより、
吸込み口２４から吸い込まれ各羽根車２１によって昇圧
された液体を該ディフューザ１０の流路によって効率良
く回収して、吐出し口２５から吐き出すことができる。As shown in FIG. 1, the diffuser body 11 and the side plate 12 are surrounded by an intermediate casing 23 disposed inside a pump casing 22 so as to surround the impeller 21 fixed to the main shaft 20. The integrated diffuser 10 is clamped and fixed.
The liquid sucked from the suction port 24 and pressurized by the respective impellers 21 can be efficiently collected by the flow path of the diffuser 10 and discharged from the discharge port 25.
【００１８】[0018]
【発明の効果】以上に説明したように、本発明によれ
ば、一体成形の難しい流路形状を持つディフューザを、
個別に樹脂成形したディフューザ本体と側板を組み合わ
せて構成することにより、生産性の向上と、ディフュー
ザ自体のコストダウンを図ることができる。しかも、接
着剤を使用することなく、ディフューザ本体と側板とを
一体化することができ、これによって、対薬品性に優れ
た樹脂材料でディフューザを構成することができる。更
に、ディフューザを取付けた時の主軸とディフューザの
同芯度の寸法精度を保持することができる。As described above, according to the present invention, a diffuser having a flow path shape which is difficult to integrally mold is provided.
By combining the diffuser main body and the side plate individually molded with resin, it is possible to improve productivity and reduce the cost of the diffuser itself. In addition, the diffuser body and the side plate can be integrated without using an adhesive, whereby the diffuser can be made of a resin material having excellent chemical resistance. Further, the dimensional accuracy of concentricity between the main shaft and the diffuser when the diffuser is attached can be maintained.
【図１】本発明の実施の形態を示す断面図。FIG. 1 is a cross-sectional view illustrating an embodiment of the present invention.
【図２】同じく、ディフューザ本体と側板とを一体化す
る前の状態を示す要部拡大断面図。FIG. 2 is an enlarged sectional view of a main part showing a state before the diffuser main body and the side plate are integrated.
【図３】同じく、ディフューザ本体と側板とを一体化し
た後の状態を示す要部拡大断面図。FIG. 3 is an enlarged sectional view of a main part showing a state after the diffuser main body and the side plate are integrated.
【図４】本発明の実施の形態を２段ポンプに使用した適
用した状態を示す断面図。FIG. 4 is a sectional view showing a state where the embodiment of the present invention is applied to a two-stage pump.
【図５】従来例を示す断面図。FIG. 5 is a sectional view showing a conventional example.
１０ ディフューザ １１ ディフューザ本体 １２ 側板 １３ ほぞ穴 １３ｂ 同嵌着部 １４ ほぞ １４ｂ 同楔状部 DESCRIPTION OF SYMBOLS 10 Diffuser 11 Diffuser main body 12 Side plate 13 Mortise hole 13b Same fitting portion 14 Mortice 14b Same wedge-shaped portion
───────────────────────────────────────────────────── フロントページの続き (72)発明者 照山 廣之 大阪府大阪市旭区大宮４丁目23番７号 スターライト工業 株式会社内 (72)発明者 大田原 敏晃 大阪府大阪市旭区大宮４丁目23番７号 スターライト工業 株式会社内 (56)参考文献 特開 平７−243400（ＪＰ，Ａ) 特開 昭53−140602（ＪＰ，Ａ) 特開 平７−286593（ＪＰ，Ａ) 特開 平８−159093（ＪＰ，Ａ) 実公 昭63−37518（ＪＰ，Ｙ２) 実公 平７−24635（ＪＰ，Ｙ２) (58)調査した分野(Int.Cl.7，ＤＢ名) F04D 29/40 - 29/56 F04D 29/60 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroyuki Teruyama 4-23-7 Omiya, Asahi-ku, Osaka-shi, Osaka Starlight Industry Co., Ltd. (72) Inventor Toshiaki Otara 4-chome, Omiya, Asahi-ku, Osaka-shi, Osaka No. 23-7 Starlight Industry Co., Ltd. (56) Reference JP-A-7-243400 (JP, A) JP-A-53-140602 (JP, A) JP-A-7-286593 (JP, A) Hei 8-1559093 (JP, A) Jikken 63-37518 (JP, Y2) Jiko 7-24635 (JP, Y2) (58) Fields investigated (Int. Cl. 7 , DB name) F04D 29 / 40-29/56 F04D 29/60
Claims (1)
からなり、前記ディフューザ本体の流路形成部以外でデ
ィフューザ基礎円と同じ中心を持つ円周上に該円周方向
に沿って該ディフューザ本体の内部を延びる嵌着部を有
するほぞ穴を設けるとともに、前記側板の流路形成部で
該側板の円周と同じ中心を持つ円周上に該円周方向に沿
って延びる楔状部を有するほぞを前記ほぞ穴に嵌合自在
に設けたことを特徴とする樹脂製ディフューザ。1. A diffuser body and a side plate, both of which are made of resin, and are arranged along a circumferential direction on a circumference having the same center as a diffuser base circle other than a flow path forming portion of the diffuser body. A tenon having a fitting portion extending inside is provided, and a tenon having a wedge-shaped portion extending along the circumferential direction on a circumference having the same center as the circumference of the side plate in the flow path forming portion of the side plate. A resin diffuser, which is provided so as to be freely fitted in the mortise.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28438497A JP3169176B2 (en) | 1997-09-30 | 1997-09-30 | Resin diffuser |
| AU92804/98A AU9280498A (en) | 1997-09-30 | 1998-09-30 | A turbo type fluid machinery and a diffuser therefor |
| PCT/JP1998/004407 WO1999017025A1 (en) | 1997-09-30 | 1998-09-30 | A turbo type fluid machinery and a diffuser therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28438497A JP3169176B2 (en) | 1997-09-30 | 1997-09-30 | Resin diffuser |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11107991A JPH11107991A (en) | 1999-04-20 |
| JP3169176B2 true JP3169176B2 (en) | 2001-05-21 |
Family
ID=17677895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28438497A Expired - Fee Related JP3169176B2 (en) | 1997-09-30 | 1997-09-30 | Resin diffuser |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3169176B2 (en) |
| AU (1) | AU9280498A (en) |
| WO (1) | WO1999017025A1 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58165298U (en) * | 1982-04-30 | 1983-11-02 | 株式会社ボッシュオートモーティブ システム | Air conditioning blower |
| JPH0455277Y2 (en) * | 1988-03-03 | 1992-12-25 | ||
| US4859144A (en) * | 1988-03-07 | 1989-08-22 | The Hoover Company | Fan stage configuration |
-
1997
- 1997-09-30 JP JP28438497A patent/JP3169176B2/en not_active Expired - Fee Related
-
1998
- 1998-09-30 WO PCT/JP1998/004407 patent/WO1999017025A1/en active Application Filing
- 1998-09-30 AU AU92804/98A patent/AU9280498A/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11107991A (en) | 1999-04-20 |
| WO1999017025A1 (en) | 1999-04-08 |
| AU9280498A (en) | 1999-04-23 |
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