JPH10206285A - Ejector device - Google Patents
Ejector deviceInfo
- Publication number
- JPH10206285A JPH10206285A JP756897A JP756897A JPH10206285A JP H10206285 A JPH10206285 A JP H10206285A JP 756897 A JP756897 A JP 756897A JP 756897 A JP756897 A JP 756897A JP H10206285 A JPH10206285 A JP H10206285A
- Authority
- JP
- Japan
- Prior art keywords
- primary fluid
- ejector
- plug
- ejection hole
- pressure
- 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.)
- Granted
Links
Landscapes
- Testing Of Engines (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、低圧室を実現する
ための排気装置等に用いられるエジェクタ装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ejector device used for an exhaust device for realizing a low-pressure chamber.
【０００２】[0002]
【従来の技術】ロケットエンジンやジェットエンジンの
高空模擬試験を行う試験設備では、試験室を低圧にする
必要があり、このような場合に排気装置としてエジェク
タ装置が使用される。2. Description of the Related Art In a test facility for performing a high altitude simulation test of a rocket engine or a jet engine, it is necessary to reduce the pressure in a test room. In such a case, an ejector device is used as an exhaust device.
【０００３】図３に従来のエジェクタ装置の構造を示し
てある。図３において、１はエジェクタ本体で、圧力室
４を有し、圧力室４には一次流体供給ライン６、スロー
ト部９、及びノズルスカート１１が設けられている。FIG. 3 shows the structure of a conventional ejector device. In FIG. 3, reference numeral 1 denotes an ejector main body, which has a pressure chamber 4, and the pressure chamber 4 is provided with a primary fluid supply line 6, a throat portion 9, and a nozzle skirt 11.
【０００４】図３に示すように、従来のエジェクタ装置
では、そのスロート部９の有効断面積は固定されてお
り、通過する一次流体の流速は圧力室４の圧力に比例し
たものとなる。なお、図３において、２−１はディフュ
ーザ入口（二次流入口）、２−２はディフューザスロー
ト部、２−３はディフューザ出口を示している。As shown in FIG. 3, in the conventional ejector device, the effective cross-sectional area of the throat portion 9 is fixed, and the flow rate of the primary fluid passing therethrough is proportional to the pressure in the pressure chamber 4. In FIG. 3, 2-1 indicates a diffuser inlet (secondary inlet), 2-2 indicates a diffuser throat portion, and 2-3 indicates a diffuser outlet.
【０００５】[0005]
【発明が解決しようとする課題】図３に示したように、
従来のエジェクタ装置では、その作動範囲を制御するの
に一次流体供給圧力を変えるしかない。一次流体の流量
と圧力の関係は１つの固定された曲線しかなく、エジェ
クタ装置の作動範囲は極めて限られていた。As shown in FIG. 3,
In conventional ejector devices, the only way to control its operating range is to change the primary fluid supply pressure. The relationship between the flow rate and pressure of the primary fluid was only one fixed curve, and the operating range of the ejector device was extremely limited.
【０００６】特に、二次流体の流量を大幅に変えること
なく二次流体圧を下げるためには、一次流体の流量を減
らす必要があるが、このためには一次流体供給圧力を下
げるしか方法がない。In particular, in order to lower the secondary fluid pressure without greatly changing the flow rate of the secondary fluid, it is necessary to reduce the flow rate of the primary fluid, but the only way to do this is to lower the primary fluid supply pressure. Absent.
【０００７】ところが超音速エジェクタ装置の場合、一
次流体は、（ノズル開口面積）／（スロート面積）以下
での膨張比を取れないのでエジェクタ装置の性能を変え
るのに自ずと制限があり、超音速ディフューザとして作
動しなくなる、いわゆるブレイク現象が発生し、逆に二
次流体圧は上がってしまう。However, in the case of a supersonic ejector device, the primary fluid cannot take an expansion ratio of (nozzle opening area) / (throat area) or less, so that there is naturally a limitation in changing the performance of the ejector device, and a supersonic diffuser is required. As a result, a so-called break phenomenon occurs, and conversely, the secondary fluid pressure increases.
【０００８】また、二次流体圧を或る範囲内にして二次
流体の流量を上げる時、従来方式では一次流体の供給圧
力を上げることしかできず、この方法だと二次流体圧も
上がって了うという問題がある。Further, when the secondary fluid pressure is set within a certain range to increase the flow rate of the secondary fluid, the conventional method can only increase the supply pressure of the primary fluid, and this method also increases the secondary fluid pressure. There is a problem of ending.
【０００９】本発明は、二次流体の流量を大幅に変える
ことなく二次流体圧を下げたり、二次流体圧を上昇させ
ることなく二次流体の流量を増やすなど作動範囲を拡大
したエジェクタ装置を提供することを課題としている。The present invention provides an ejector device having an extended operating range, such as lowering the secondary fluid pressure without significantly changing the flow rate of the secondary fluid, or increasing the flow rate of the secondary fluid without increasing the secondary fluid pressure. The challenge is to provide
【００１０】[0010]
【課題を解決するための手段】本発明は、前記課題を解
決するため、一次流体の供給圧力だけでなく、一次流体
に対するスロート面積（スロート径）の可変をパラメー
タとして加えられる構造のエジェクタ装置を提供する。In order to solve the above-mentioned problems, the present invention provides an ejector device having a structure in which not only the supply pressure of the primary fluid but also a variable throat area (throat diameter) for the primary fluid is added as a parameter. provide.
【００１１】すなわち、本発明は、ディフューザ及び同
ディフューザ内に同軸に配設され一次流体噴出孔を具え
たエジェクタ本体を有するエジェクタ装置において、先
端が尖った円錐形で前記一次流体噴出孔に対し内部から
進退され同一次流体噴出孔との間に環状のスロート部を
形成するプラグを設ける。更に、そのプラグを前記した
一次流体噴出孔に向け進退させるプラグ駆動装置を設け
た構造のエジェクタ装置とする。That is, the present invention relates to an ejector device having a diffuser and an ejector body provided coaxially in the diffuser and having a primary fluid ejection hole, wherein the tip of the primary fluid ejection hole is formed in a conical shape with a sharp point. A plug is provided which moves forward and backward to form an annular throat portion between itself and the same fluid ejection hole. Further, the ejector device has a structure provided with a plug drive device for moving the plug toward the primary fluid ejection hole.
【００１２】本発明によるエジェクタ装置は前記した構
成を有していて、第一次流体噴出孔とプラグとの間の環
状のスロート部のスロート面積がプラグの進退動により
変化される。これにより一次流体の流量と圧力の関係
は、一曲線上に限定されることなく、幅のある曲線上に
広げられることとなり、エジェクタの作動範囲は拡大す
る。The ejector device according to the present invention has the above-described configuration, and the throat area of the annular throat portion between the primary fluid ejection hole and the plug is changed by the advance and retreat of the plug. As a result, the relationship between the flow rate and the pressure of the primary fluid is not limited to one curve, but is expanded on a wide curve, and the operating range of the ejector is expanded.
【００１３】具体的には、本発明によるエジェクタ装置
では、スロート面積を絞り一次流体を高圧で供給すれば
従来の装置で発生していたプレイク現象を生ずることが
ない。More specifically, in the ejector device according to the present invention, if the throat area is reduced and the primary fluid is supplied at a high pressure, the break phenomenon that occurs in the conventional device does not occur.
【００１４】また、或る二次流体圧の範囲内で二次流体
の流量を上げるとき、従来のエジェクタ装置では一次流
体供給圧力を上げることしかできず、この方式だと二次
流体圧も上がる。しかしながら、本発明によるエジェク
タ装置では、一次流体供給圧力は一定でスロート径を大
きくして一次流体流量を増やせば、二次流体圧力を上昇
させることなく二次流体流量を増やすことができる。Further, when increasing the flow rate of the secondary fluid within a certain range of the secondary fluid pressure, the conventional ejector device can only increase the primary fluid supply pressure, and this system also increases the secondary fluid pressure. . However, in the ejector device according to the present invention, if the primary fluid supply pressure is constant and the throat diameter is increased to increase the primary fluid flow rate, the secondary fluid flow rate can be increased without increasing the secondary fluid pressure.
【００１５】[0015]
【発明の実施の形態】以下、本発明によるエジェクタ装
置について図１に示した実施の一形態に基づいて具体的
に説明する。なお、以下の実施の形態において、図３に
示した従来の装置と同じ構成の部分には説明を簡単にす
るため同じ符号を付してあり、それらについての重複す
る説明は省略する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an ejector device according to the present invention will be specifically described based on one embodiment shown in FIG. In the following embodiments, the same components as those of the conventional device shown in FIG. 3 are denoted by the same reference numerals for simplification of description, and redundant description thereof will be omitted.
【００１６】エジェクタ本体１は、プラグ３、圧力室
４、プラグ駆動装置５から構成される。また、圧力差４
にはエジェクタの作動流体となる一次流体供給ライン６
が接続されている。The ejector body 1 comprises a plug 3, a pressure chamber 4, and a plug driving device 5. In addition, pressure difference 4
Has a primary fluid supply line 6 serving as a working fluid of the ejector.
Is connected.
【００１７】プラグ３は、先端が尖った円錐形で、一次
流体噴出孔に対し内部から進退され、その一次流体噴出
孔との間に環状のスロート部９を形成するように構成さ
れている。The plug 3 has a conical shape with a sharp point, and is configured to advance and retreat from the inside with respect to the primary fluid ejection hole, and to form an annular throat portion 9 with the primary fluid ejection hole.
【００１８】プラグ３はプラグ駆動装置５により一次流
体噴出孔に向け前後に移動され、これによってスロート
部９の有効面積を変化させて、一次流体の流れる流量を
変化させることができる。The plug 3 is moved back and forth toward the primary fluid ejection hole by the plug drive device 5, whereby the effective area of the throat portion 9 can be changed and the flow rate of the primary fluid can be changed.
【００１９】一次流体供給ライン６により供給される気
体は、圧力室４に入り、スロート部９を通過して音速以
上の速度となり、さらにプラグ３の斜面で滑らかに膨張
加速する。これにより従来のエジェクタ装置より１０〜
２０％程度多い流量を流すことができエジェクタ性能を
向上させる。なお、プラグ駆動装置５は、ギヤを利用し
た手動駆動や、油圧を利用した油圧アクチュエータ駆
動、電動モータ駆動等、種々の構成のものであってよ
い。The gas supplied by the primary fluid supply line 6 enters the pressure chamber 4, passes through the throat 9, has a speed higher than the speed of sound, and further smoothly expands and accelerates on the slope of the plug 3. This makes the conventional ejector device 10-
The flow rate can be increased by about 20% to improve the ejector performance. The plug driving device 5 may have various configurations such as manual driving using gears, hydraulic actuator driving using hydraulic pressure, and electric motor driving.
【００２０】以上、本発明を図示した実施の一形態に基
づいて具体的に説明したが、本発明がこれらの実施形態
に限定されず特許請求の範囲に示す本発明の範囲内で、
その具体的構造、構成に種々の変更を加えてよいことは
いうまでもない。As described above, the present invention has been specifically described based on one embodiment shown in the drawings. However, the present invention is not limited to these embodiments, and within the scope of the present invention shown in the claims,
It goes without saying that various changes may be made to the specific structure and configuration.
【００２１】例えば、上記実施形態では図１のＡに示す
ようにエジェクタ本体１を１個だけ設けているが、図１
のＢ部に適宜の個数を直列に配置してもよい。For example, in the above embodiment, only one ejector main body 1 is provided as shown in FIG.
A suitable number may be arranged in series in section B.
【００２２】[0022]
【発明の効果】以上説明したように、本発明は、ディフ
ューザ及び同ディフューザ内に同軸に配設され一次流体
噴出孔を具えたエジェクタ本体を有するエジェクタ装置
において、先端が尖った円錐形で前記一次流体噴出孔に
対し内部から進退され同一次流体噴出孔との間に環状の
スロート部を形成するプラグと、同プラグを前記一次流
体噴出孔に向け進退させるプラグ駆動装置を有する構成
のエジェクタ装置を提供する。As described above, the present invention relates to an ejector apparatus having a diffuser and an ejector body provided coaxially in the diffuser and having a primary fluid ejection hole. An ejector device having a plug that moves forward and backward from the fluid ejection hole to form an annular throat between itself and the same fluid ejection hole, and a plug drive device that moves the plug toward and away from the primary fluid ejection hole. provide.
【００２３】このエジェクタ装置においては、そのプラ
グをプラグ駆動装置によって進退させることにより第一
次流体噴出孔とプラグの間の環状のスロート部のスロー
ト面積が変化され一次流体の流量と圧力の関係は一曲線
上に限定されることなく幅のある曲線上に広げられエジ
ェクタの作動範囲は拡大する。In this ejector device, by moving the plug forward and backward by the plug driving device, the throat area of the annular throat portion between the primary fluid ejection hole and the plug is changed, and the relationship between the flow rate and pressure of the primary fluid is changed. The operating range of the ejector is expanded not only on one curve but on a wide curve.
【００２４】また、本発明によるエジェクタ装置では円
錐形のプラグを用い、そのプラグと一次流体噴出孔との
間に環状のスロート部を形成させているので、一次流体
の流れに対しスロート以降も流路形状が滑らかに変化す
るので、従来のエジェクタ装置のように一次流体の流路
がスロート部の出口から急拡大して剥離を起こすような
ことがなくエジェクタとしての性能が向上する。In the ejector device according to the present invention, a conical plug is used, and an annular throat portion is formed between the plug and the primary fluid ejection hole. Since the path shape changes smoothly, the performance of the ejector can be improved without causing the primary fluid flow path to suddenly expand from the outlet of the throat portion and causing separation as in the conventional ejector device.
【図１】本発明の実施の一形態によるエジェクタ装置の
構造を示す説明図。FIG. 1 is an explanatory diagram showing a structure of an ejector device according to an embodiment of the present invention.
【図２】図１におけるＣ部の拡大図。FIG. 2 is an enlarged view of a portion C in FIG.
【図３】従来のエジェクタ装置の構造を示す説明図。FIG. 3 is an explanatory view showing the structure of a conventional ejector device.
１ エジェクタ本体 ２ ディフューザ ３ プラグ ４ 圧力室 ５ プラグ駆動装置 ６ 一次流体供給ライン ９ スロート部 ２−１ ディフューザ入口 ２−２ ディフューザスロート部 ２−３ ディフューザ出口 １１ ノズルスカート DESCRIPTION OF SYMBOLS 1 Ejector main body 2 Diffuser 3 Plug 4 Pressure chamber 5 Plug drive device 6 Primary fluid supply line 9 Throat part 2-1 Diffuser inlet 2-2 Diffuser throat part 2-3 Diffuser outlet 11 Nozzle skirt
Claims (1)
軸に配設され一次流体噴出孔を具えたエジェクタ本体を
有するエジェクタ装置において、先端が尖った円錐形で
前記一次流体噴出孔に対し内部から進退され同一次流体
噴出孔との間に環状のスロート部を形成するプラグと、
同プラグを前記一次流体噴出孔に向け進退させるプラグ
駆動装置を有することを特徴とするエジェクタ装置。1. An ejector device having a diffuser and an ejector main body provided coaxially in the diffuser and having a primary fluid ejection hole, wherein the ejector body has a pointed conical shape and moves forward and backward with respect to the primary fluid ejection hole. A plug that forms an annular throat between the next fluid ejection hole,
An ejector device comprising a plug driving device for moving the plug toward and away from the primary fluid ejection hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00756897A JP3382803B2 (en) | 1997-01-20 | 1997-01-20 | Ejector device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00756897A JP3382803B2 (en) | 1997-01-20 | 1997-01-20 | Ejector device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10206285A true JPH10206285A (en) | 1998-08-07 |
| JP3382803B2 JP3382803B2 (en) | 2003-03-04 |
Family
ID=11669422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP00756897A Expired - Lifetime JP3382803B2 (en) | 1997-01-20 | 1997-01-20 | Ejector device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3382803B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002081687A (en) * | 2000-08-03 | 2002-03-22 | Ming Shu Huang | Ventilator of air conditioner |
| JP2007154897A (en) * | 2005-12-07 | 2007-06-21 | General Electric Co <Ge> | Turbine system including variable power nozzle ejector and method for utilizing bleed air of compressor to the maximum extent |
-
1997
- 1997-01-20 JP JP00756897A patent/JP3382803B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002081687A (en) * | 2000-08-03 | 2002-03-22 | Ming Shu Huang | Ventilator of air conditioner |
| JP2007154897A (en) * | 2005-12-07 | 2007-06-21 | General Electric Co <Ge> | Turbine system including variable power nozzle ejector and method for utilizing bleed air of compressor to the maximum extent |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3382803B2 (en) | 2003-03-04 |
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