JPS5929800A - Pump - Google Patents

Abstract

PURPOSE:To make it possible to raise liquid pressure to a prescribed value by allowing the outer peripheral edge of an intermediate shroud provided between a shroud and a hub, and a wall for partitioning a spiral chamber provided on a casing inner wall to make slidable contact with each other in a liquidtight manner, and separating flowing substance of gas-liquid mixture into bubbles and liquid. CONSTITUTION:The outer peripheral end of a partition 51 is secured to the inner wall of a casing 50, and its inner peripheral end makes slidable contact with the outer peripheral end of an intermediate shroud 14 located between a shroud 12 and a hub 13 through a packing 52, while forming liquidtightness between them. Hereby, in case the flowing substance of gas-liquid mixture flows into a pump through a suction inlet 30, the liquid contained in the flowing substance leaving an inducer 20 runs through a passage constructed by a blade 11-A, the shroud 12, and an intermediate shroud 14, being sequentially raised in its pressure, and is forcedly sent to a discharge port (not illustrated). On the other hand, the bubbles pass through a passage constructed by a blade 11-13, the intermediate shroud 14, and the hub 13, being raised in its pressure, and is discharged from another discharge port (not illustrated) different from the liquid discharge port. Accordingly, it is possible to separate the flowing substance of gas- liquid mixture into bubbles and liquid, and raise liquid pressure to a prescribed value.

Description

【発明の詳細な説明】 本発明はポンプ、こと終ボイラ胎水ポンプ、水中航行体
エンジン用給水ポンプ等に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pump, particularly a final boiler water pump, a water supply pump for an underwater vehicle engine, and the like.

従来めこの種のポンプにおいては第１図に示すように、
羽根車１０は、羽根１１とそれが固設されているシュラ
ウド１２およびハフェ３がら構成される。また、インデ
ューサ２ｏは、らせん状のインデューサ羽根２１とそれ
が固設されているインテユーサシュラウド２２から構成
され、同インデューサシュラウド２２の出口端が前記シ
ュラウド１２の入口端に固設されている。As shown in Fig. 1, conventional pumps of this type have:
The impeller 10 includes blades 11, a shroud 12 to which the blades are fixed, and a hafe 3. Further, the inducer 2o is composed of a spiral inducer blade 21 and an inducer shroud 22 to which it is fixed, and the outlet end of the inducer shroud 22 is fixed to the inlet end of the shroud 12. There is.

ケーシング５０は、羽根車１０を囲むと同時に、渦冨４
０を形成する。The casing 50 surrounds the impeller 10 and at the same time surrounds the vortex 4
form 0.

３０は吸込口、６０は吐出口である。30 is a suction port, and 60 is a discharge port.

羽根車１０か電動機またはタービン（いずれも図示せず
）によって回転させられると、吸込口３０かも液体が流
入し、インチユーブ２０および羽根車１０を通る間に昇
圧され、渦室４０にυＩＣれ込んでから動圧を回収して
さらに昇圧され、吐出０６０から吐出される。When the impeller 10 is rotated by an electric motor or a turbine (none of which are shown), liquid also flows into the suction port 30, is pressurized as it passes through the inch tube 20 and the impeller 10, and flows υIC into the vortex chamber 40. Dynamic pressure is recovered from the pump, the pressure is further increased, and the pressure is discharged from the discharge port 060.

この時、吸込口３０の圧力が低いと、インデュ工 一す２０において気泡が発辺する。インデューサ羽根２
１の回転による遠心力の作用によって、軽い気心は羽根
のない中心部に集まる。インデューサ２０の出口におい
ては、圧力が上昇するので、気心は消滅する。したがっ
て、インチユーブ２０のない場合よりも低い吸込口３０
の圧力まで、羽根車１０で気泡が発生しない。すなわち
、吸込性能が向上する。At this time, if the pressure at the suction port 30 is low, air bubbles will form in the inductor 20. Inducer blade 2
Due to the centrifugal force caused by the rotation of 1, the light air core gathers in the bladeless center. At the outlet of the inducer 20, the pressure increases so that the air core disappears. Therefore, the suction port 30 is lower than without the inch tube 20.
No bubbles are generated in the impeller 10 up to a pressure of . That is, suction performance is improved.

然し、これにも次の欠点がある。すなわち、非凝縮気体
と液体の混合流体を吸込む場合、インデューサ２０の出
口においても気泡は消滅しないで、羽根車１０に流入す
るのて、所要の圧力に昇圧できない。However, this also has the following drawbacks. That is, when a mixed fluid of non-condensable gas and liquid is sucked, bubbles do not disappear at the outlet of the inducer 20 and flow into the impeller 10, so that the pressure cannot be increased to the required pressure.

本発明は上記の欠点を排除し、気液混合流体の吸込みの
一合に、気泡と流体とを分離し、液体の圧力を所要の値
に昇圧できるポンプを提供することを目的としている。The object of the present invention is to eliminate the above-mentioned drawbacks and to provide a pump that can separate air bubbles and fluid during suction of a gas-liquid mixed fluid and increase the pressure of the fluid to a desired value.

以下第２図により本発明の実施例について欣明する。An embodiment of the present invention will be explained below with reference to FIG.

羽根車ＪＯはンユ之ウド１２とバブ１３との間に中間シ
ュラウド１４を設けられていてこの中間シュラウド１４
により羽根部分は２つに分けられて羽根１１−Ａおよび
１１−Ｂが摘取されている。The impeller JO is provided with an intermediate shroud 14 between the windshield 12 and the bubble 13.
The blade portion is divided into two parts, and blades 11-A and 11-B are removed.

ケーシング５０は、羽根車１０を囲むと同時に、渦室４
０−Ａおよび４０−Ｂを形成する。隔Ｖ　５１は、その
外周端がＡｉＪ記ケ−７ング５０の内壁に固設され、内
周端はシール用パツキン５２を介して前記中間シュラウ
ド１４の外周端と泥体密に摺動するようになっている。The casing 50 surrounds the impeller 10 and at the same time the vortex chamber 4
Form 0-A and 40-B. The outer circumferential end of the gap V 51 is fixed to the inner wall of the AiJ casing 50, and the inner circumferential end is so arranged that it slides tightly against the outer circumferential end of the intermediate shroud 14 via a sealing gasket 52. It has become.

その他は従来のものに同じである。The rest is the same as the conventional one.

れると、吸込口３０かも気液混合流体が流入し、インデ
ューサ２０を通る間に昇圧されると同時に、気泡と液体
に分離し、気泡はインデューサ２０の中心部に、液体は
インデューサ羽根２１とインデューサシュラウド２２で
形成される通路に集まって流れる。インデューサ２０を
出た流体の内、液体（若干の気泡を含むこともある）は
、羽根１１−Ａ、　シュラウド１２および中間シュラウ
ド１４で形成される通路を通って昇圧され、渦ｇ４ｏ−
Ａでさらに昇圧されて吐出口（図示せず）から吐出され
る。他方、気泡（若干の液体を含むこともある）は、羽
根１１−Ｂ、中間シュラウド１４および・・ブ１３で形
成される通路を通って昇圧され、渦室４０−Ｂでさらに
昇圧されて、液吐出口とは異なる吐出口（図示せず）か
ら吐出される。When the gas-liquid mixture flows into the suction port 30, the pressure is increased while passing through the inducer 20, and at the same time it separates into bubbles and liquid, with the bubbles flowing into the center of the inducer 20 and the liquid flowing into the inducer blade. 21 and the inducer shroud 22. The liquid (which may contain some air bubbles) out of the inducer 20 is pressurized through the passage formed by the vane 11-A, the shroud 12, and the intermediate shroud 14, and the vortex g4o-
It is further pressurized at A and is discharged from a discharge port (not shown). On the other hand, the air bubbles (which may contain some liquid) are pressurized through the passage formed by the vanes 11-B, the intermediate shroud 14, and the bubbles 13, and are further pressurized in the vortex chamber 40-B. The liquid is ejected from an ejection port (not shown) different from the liquid ejection port.

この結果通常のポンプでは、所要の圧力上昇が得られな
い気液混合流体の吸込みの場合に、同流体を気泡と液体
に分離し、液体の圧力を所要の圧力に昇圧することがて
きる。As a result, when a gas-liquid mixed fluid is being sucked in, where a normal pump cannot achieve the required pressure increase, the fluid can be separated into bubbles and liquid, and the pressure of the liquid can be increased to the required pressure.

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

第１図は従来の気液混合流体吸込可能なポンプの断面部
および第２図は本発明の実施例を示す断面図である。 １０・・羽根車、１１，１１−Ａ、１１−８・・羽根、
１２・・シュラウド、１３・・ハブ、１４・・中間シュ
ラウド、２０・・インデューサ、２１・・インデューサ
羽根、２２・・インデューサシュラウド、３０・・吸込
口、４０，４０−Ａ、４０−Ｂ・・渦室、５０・・ケー
シング、５１・・隔壁、５２・・シール用パツキン、６
０・・吐出口。 第１図 第Ｚ図FIG. 1 is a sectional view of a conventional pump capable of sucking a gas-liquid mixed fluid, and FIG. 2 is a sectional view showing an embodiment of the present invention. 10... impeller, 11, 11-A, 11-8... impeller,
12... Shroud, 13... Hub, 14... Intermediate shroud, 20... Inducer, 21... Inducer blade, 22... Inducer shroud, 30... Suction port, 40, 40-A, 40- B... Vortex chamber, 50... Casing, 51... Partition wall, 52... Seal packing, 6
0...Discharge port. Figure 1 Figure Z

Claims (1)

【特許請求の範囲】[Claims] 羽根車の上流にインデューサを有するポンプにおいて、
同羽根車のシュラウドとハブとの間に中間シュラウドを
設け、この中間シュラウドの外周端縁と、羽根車を囲む
ケーシングの内壁に設けた渦室を区画する隔壁とを流体
密に摺接せしめたことを特徴とするポンプ。In a pump having an inducer upstream of the impeller,
An intermediate shroud is provided between the shroud and the hub of the impeller, and the outer peripheral edge of the intermediate shroud and a partition wall that partitions a vortex chamber provided on the inner wall of a casing surrounding the impeller are brought into fluid-tight sliding contact. A pump characterized by: