JPS58167895A - Barrel type multistage pump - Google Patents

Barrel type multistage pump

Info

Publication number
JPS58167895A
JPS58167895A JP4909082A JP4909082A JPS58167895A JP S58167895 A JPS58167895 A JP S58167895A JP 4909082 A JP4909082 A JP 4909082A JP 4909082 A JP4909082 A JP 4909082A JP S58167895 A JPS58167895 A JP S58167895A
Authority
JP
Japan
Prior art keywords
stage
barrel
pump
thermal expansion
peripheral surface
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
Application number
JP4909082A
Other languages
Japanese (ja)
Inventor
Minoru Iino
飯野 稔
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP4909082A priority Critical patent/JPS58167895A/en
Publication of JPS58167895A publication Critical patent/JPS58167895A/en
Pending legal-status Critical Current

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  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

PURPOSE:To easily assemble and disassemble a barrel type multistage pump by manufacturing a stage and a barrel with materials differing in their coefficients of thermal expansion and properly providing a gap between the stage and the barrel. CONSTITUTION:When a pump is operated under a cryogenic remperature, the internal diameter of a barrel 5 is shrunk compared with the external one of a stage 4, and the external peripheral surface of each stage 4 and the internal peripheral surface of the barrel 5 are joined with each other and sealed. On the contrary, in a pump operated under a higher temperature, if the stage 4 is manufactured with a material having a larger coefficient of thermal expansion than that of the barrel 5, the stage 4 and the barrel 5 are joined with each other and sealed since the stage 4 is still more thermally expanded than the barrel 5, so that it is possible to previously prevent a high pressure fluid to leak out.

Description

【発明の詳細な説明】 本発明はバーレル型多段ポンプ、例えば室軸液中モータ
ポンプに関するものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a barrel-type multi-stage pump, such as a chamber-shaft submersible motor pump.

従来のこの種多段ポンプは第1図に示すように、ポンプ
軸1に取付けられた羽根車2およびこの羽根車2の吐出
側に設けた輪切形ディフューザ3を、円筒状パーシル5
内に装てんされた外筒部4 ’aを有する輪切形ステー
ジ4′と一緒に前記パーシル5内に収納し、このバーレ
ル5の一端にボルト8を介してサクションケーシング6
k、他端にボルト9を介してモータケーシング7をそれ
ぞれ取付けて構成されている。
As shown in FIG. 1, a conventional multi-stage pump of this type has an impeller 2 attached to a pump shaft 1 and a ring-shaped diffuser 3 provided on the discharge side of the impeller 2.
It is housed in the persil 5 together with a ring-shaped stage 4' having an outer cylinder part 4'a loaded therein, and a suction casing 6 is connected to one end of this barrel 5 via a bolt 8.
k, and a motor casing 7 is attached to the other end via bolts 9, respectively.

上記のような構成からなるポンプの組立時には、酌記各
ステージ4′間のインローを合せて軸心が合致するよう
に組立を行った後に、ボルト8.9を締付けてステージ
4′間を金属接触させることによりシールする。この場
合、ステージ4′の外径とバーレル5の内径との間には
空間が形成されているため、ポンプの外径が大きくなる
ばがシでなく、バーレル5の外径も大であるからボルト
8゜9の本数も多数となる。また高圧のポンプを製作す
る際には、パー7ル5はもちろんステージ3の肉厚を厚
くしなければならないなどの欠点がある。
When assembling a pump with the above configuration, after aligning the spigot between each stage 4' and aligning the axes, tighten the bolts 8 and 9 to connect the metal between the stages 4'. Seal by contact. In this case, since a space is formed between the outer diameter of the stage 4' and the inner diameter of the barrel 5, the outer diameter of the pump is not necessarily large, but the outer diameter of the barrel 5 is also large. The number of bolts 8°9 is also large. In addition, when manufacturing a high-pressure pump, there are drawbacks such as the need to increase the wall thickness of not only the pearl 7 but also the stage 3.

一方、ポンプを小型化するためには、バーレル5の直径
を小さくする必要があるので、ステージ3の外筒部を排
除して各段のステージ外周面とバーレル内周面とを接合
させてシールする手段が考慮されるが、そのシールKO
リングを使用すると、組立時に01Jングが摺動するか
ら傷付き易い。またパーレル内径に段差を設けると共に
、各段ごとにステージ外径を変化させても、組立順序が
煩雑で、かつ部品を統一することが困難である不都合を
生ずる欠点がある。
On the other hand, in order to downsize the pump, it is necessary to reduce the diameter of the barrel 5, so the outer cylindrical part of the stage 3 is removed and the outer circumferential surface of each stage and the inner circumferential surface of the barrel are joined to form a seal. Means to do so are considered, but the seal KO
If you use a ring, the 01J ring will slide during assembly and will easily get damaged. Further, even if a step is provided on the inner diameter of the parrel and the outer diameter of the stage is changed for each stage, there are disadvantages in that the assembly order is complicated and it is difficult to unify the parts.

本発明は上記従来の諸欠点を解消し、小型で、かつ分解
、組立の容易なバーレル型多段ポンプを提供することを
目的とするもので、円筒状バーレルに内蔵されるステー
ジの外筒部を廃止し、このステージと前記バーレルを熱
膨張率の相異なる材料により製作すると共に、前記ステ
ージとバーレルを適宜間隙を有するように組合せたこと
を特徴とするものである。
The present invention aims to eliminate the above-mentioned conventional drawbacks and provide a barrel-type multistage pump that is compact and easy to disassemble and assemble. The present invention is characterized in that the stage and the barrel are made of materials having different coefficients of thermal expansion, and the stage and the barrel are combined with an appropriate gap.

以下本発明の一実施例を図面について説明する。An embodiment of the present invention will be described below with reference to the drawings.

第2図に示す符号のうち一1図に示す符号と同一のもの
は同一または該当する部分を示すものとする。
Among the symbols shown in FIG. 2, the same symbols as those shown in FIG. 1 indicate the same or corresponding parts.

第2図において、3は各段の羽根車2の吐出側にそれぞ
れ設けられた同一形状の輪切型ディフューザ、4は常温
時に円筒状バーレル5と適宜間隙を有するように、その
バーシル5内に装てんされ、かつ各段とも同一形状に形
成された輪切型ステージで、これらのステージ4は第1
図に示す従来のステージ4′の外筒部4aを廃止した形
状と同一に形成されている。
In FIG. 2, numeral 3 is a ring-shaped diffuser of the same shape provided on the discharge side of the impeller 2 of each stage, and numeral 4 is a ring-shaped diffuser installed in the bar sill 5 so as to have an appropriate gap with the cylindrical barrel 5 at room temperature. These stage 4 are round-shaped stages that are loaded and each stage has the same shape.
It is formed in the same shape as the conventional stage 4' shown in the figure, with the outer cylindrical portion 4a eliminated.

上記ディフューザ3お工びステージ4とバーレル5はそ
れぞれ熱膨張率の相異なる材料で製作されている。例え
ば極低温のもとで使用されるポンプでは、ディフューザ
3おLびステージ4はオーステナイト鋼ステンレスによ
り、バーレル5はアルミ合金によシそれぞれ製作されて
いる。
The diffuser 3, the manufacturing stage 4, and the barrel 5 are each made of materials having different coefficients of thermal expansion. For example, in a pump used at extremely low temperatures, the diffuser 3 L and stage 4 are made of austenitic stainless steel, and the barrel 5 is made of aluminum alloy.

最終段のステージ4nの外周面とバーレル5の内周面と
の間にはガスケット10が挿入され、ま九各段のディフ
ューザ3およびステージ4がパーレル5から脱出するの
を防止するために、最終段のステージ4nに係合するよ
うに、パーレル5の開口側端部5aにボルトを介してス
トッパ11が取付けられている。その他の構造は第1図
に示す従来例と同一であるから説明を省略する。
A gasket 10 is inserted between the outer peripheral surface of the final stage 4n and the inner peripheral surface of the barrel 5, and a gasket 10 is inserted between the outer peripheral surface of the final stage 4n and the inner peripheral surface of the barrel 5. A stopper 11 is attached to the open end 5a of the parrel 5 via a bolt so as to engage with the stage 4n. The rest of the structure is the same as the conventional example shown in FIG. 1, so the explanation will be omitted.

本実施例は上記のような構成からなり、ポンプが極低温
のもとで運転される場合、ノ(−レル5の内径を500
■とすると、約−160Cにおけるパーレル5の内径は
ステージ4の外径に比べて0.6−収縮する。この収縮
により各段のステージ4(DM周mとバーレル5の内周
面は互に接合してシールするから、高圧流体が漏洩する
のを防止することができる。同時にバーレル5は軸方向
にも収縮するが、この収縮はガスケット10により吸収
される。
This embodiment has the above-mentioned configuration, and when the pump is operated at extremely low temperatures, the inner diameter of the nozzle 5 is set to 500 mm.
Assuming (2), the inner diameter of the parrel 5 at about -160C shrinks by 0.6 compared to the outer diameter of the stage 4. Due to this contraction, the stage 4 (DM circumference m) of each stage and the inner circumferential surface of the barrel 5 are joined and sealed together, so that high pressure fluid can be prevented from leaking.At the same time, the barrel 5 can also be moved in the axial direction. However, this shrinkage is absorbed by the gasket 10.

逆に高温のもとで運転されるポンプでは、ステージ4を
バーレル5よシ熱膨張率の大きい材料で製作すれば、ス
テージ4はバーレル5よりも、より一層に熱膨張するか
らステージ4とバーレル5は互に接合してシールするの
で、高圧流体が漏洩するのを未然に防止することができ
る。
Conversely, in a pump operated at high temperatures, if stage 4 is made of a material with a higher coefficient of thermal expansion than barrel 5, stage 4 will thermally expand even more than barrel 5, so stage 4 and barrel Since the parts 5 are joined together and sealed, it is possible to prevent the high-pressure fluid from leaking.

以上説明したように本発明は、ステージの外筒部を廃止
してバーレルの外径を小さくしたので、ポンプを小型化
することができる。またステージとパーレルを熱膨張率
の相異なる材料でそれぞれ製作すると共に1ステージと
バーレルを常温時に適宜間隙を保持するように組合せた
ので、組立および分解を容易に行うことが可能である。
As explained above, the present invention eliminates the outer cylindrical portion of the stage and reduces the outer diameter of the barrel, thereby making it possible to downsize the pump. Furthermore, since the stage and the barrel are made of materials with different coefficients of thermal expansion, and the stage and barrel are combined so as to maintain an appropriate gap at room temperature, assembly and disassembly can be easily performed.

さらにバーレルの開口側端部にストッパを着脱可能に取
付けたので、ステージおよびディフューザがパーレル内
から脱出するのを防止することができる。
Further, since the stopper is removably attached to the open end of the barrel, it is possible to prevent the stage and diffuser from escaping from the inside of the barrel.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は従来のバーレル型多段ポンプの縦断面図、第2
図は本発明のバーレル型多段ポンプの一実施例を示す縦
断面図である。 2・・・羽根車、3・・・ディフューザ、4・・・ステ
ージ、5・・・バーレル、5a・・・バーレル開口iL
  11・・・ストッパ。 代理人 弁理士 薄田利幸 (・′] 7′、−
Figure 1 is a vertical cross-sectional view of a conventional barrel-type multistage pump;
The figure is a longitudinal sectional view showing an embodiment of the barrel type multistage pump of the present invention. 2... Impeller, 3... Diffuser, 4... Stage, 5... Barrel, 5a... Barrel opening iL
11...stopper. Agent Patent attorney Toshiyuki Usuda (・'] 7', -

Claims (1)

【特許請求の範囲】 1、外筒部を有する輪切形ステージ、輪切形ディフュー
ザおよび羽根車を円筒状バーレル内に多段状に収納して
なるパーレル型多段ポンプにおいて、前記ステージの外
筒部を廃止し、このステージと前記バーレルを熱膨張率
の相異なる材料によりそれぞれ製作すると共に、前記ス
テ」ジとパー7ルを適宜間隙を有するように組合せたこ
とを特徴とするバーレル臘多段ポンプ。 2 ステージの脱出を防ぐためのストッパをパー7ルの
開口端部に着脱可能に取付けたことを特徴とする特許請
求の範凹第1項記載のバーレ型多段ポンプ。
[Scope of Claims] 1. In a parrel type multi-stage pump comprising a ring-shaped stage having an outer cylindrical part, a ring-shaped diffuser, and an impeller housed in multiple stages in a cylindrical barrel, the outer cylindrical part of the stage A multi-stage barrel pump, characterized in that the stage and the barrel are made of materials having different coefficients of thermal expansion, and the stage and the barrel are combined with an appropriate gap. 2. The barre type multi-stage pump according to claim 1, characterized in that a stopper for preventing the stage from escaping is removably attached to the open end of the pearl.
JP4909082A 1982-03-29 1982-03-29 Barrel type multistage pump Pending JPS58167895A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4909082A JPS58167895A (en) 1982-03-29 1982-03-29 Barrel type multistage pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4909082A JPS58167895A (en) 1982-03-29 1982-03-29 Barrel type multistage pump

Publications (1)

Publication Number Publication Date
JPS58167895A true JPS58167895A (en) 1983-10-04

Family

ID=12821396

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4909082A Pending JPS58167895A (en) 1982-03-29 1982-03-29 Barrel type multistage pump

Country Status (1)

Country Link
JP (1) JPS58167895A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6287198U (en) * 1985-11-20 1987-06-03
US4909705A (en) * 1987-12-18 1990-03-20 Hitachi, Ltd. Multi-stage diffuse-type centrifugal pump

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6287198U (en) * 1985-11-20 1987-06-03
US4909705A (en) * 1987-12-18 1990-03-20 Hitachi, Ltd. Multi-stage diffuse-type centrifugal pump

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