JPH07253100A - Ejector vacuum pump - Google Patents
Ejector vacuum pumpInfo
- Publication number
- JPH07253100A JPH07253100A JP7140294A JP7140294A JPH07253100A JP H07253100 A JPH07253100 A JP H07253100A JP 7140294 A JP7140294 A JP 7140294A JP 7140294 A JP7140294 A JP 7140294A JP H07253100 A JPH07253100 A JP H07253100A
- Authority
- JP
- Japan
- Prior art keywords
- ejector
- pressure
- suction
- valve
- vacuum pump
- 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
- Jet Pumps And Other Pumps (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、エゼクタとポンプ手段
を組み合わせたエゼクタ真空ポンプに関し、特に、流体
循環時の騒音を防止した真空ポンプに関する。エゼクタ
真空ポンプは、ポンプ手段で流体をエゼクタ内に循環さ
せ、エゼクタ部で真空吸引力を生じるものであり、蒸気
暖房装置や低圧蒸気使用装置からの復水吸引排出装置と
して従来から用いられている。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ejector vacuum pump in which an ejector and pump means are combined, and more particularly to a vacuum pump which prevents noise during fluid circulation. The ejector vacuum pump circulates a fluid in the ejector by a pump means to generate a vacuum suction force in the ejector portion, and has been conventionally used as a condensate suction / discharge device from a steam heating device or a low-pressure steam using device. .
【0002】[0002]
【従来の技術】従来のエゼクタ真空ポンプは例えば特公
昭57−32240号公報に示されている。これは、エ
ゼクタと渦巻きポンプとタンクとを組み合わせて、タン
クへ冷却水を供給する冷却水供給通路を設け、この通路
に制御弁を取り付けると共に、制御弁とエゼクタを循環
する水温を検出する温度検出手段とを接続したもので、
エゼクタの循環水温を制御してエゼクタ部で所望の吸引
力を得るものである。2. Description of the Related Art A conventional ejector vacuum pump is disclosed in, for example, Japanese Patent Publication No. 57-32240. This is a temperature detection that combines an ejector, a centrifugal pump, and a tank to provide a cooling water supply passage for supplying cooling water to the tank, attach a control valve to this passage, and detect the water temperature circulating through the control valve and the ejector. Connected to the means,
By controlling the circulating water temperature of the ejector, a desired suction force is obtained at the ejector section.
【0003】[0003]
【発明が解決しようとする課題】上記従来のものでは、
エゼクタ部への吸引時に、吸引流体により著しい騒音を
生じる問題があった。エゼクタの吸込み室にはエゼクタ
を循環している流体の温度に対する飽和圧力にほぼ等し
い真空吸引力が生じているのであるが、外部からのエゼ
クタへの吸引流体の飽和温度が上記飽和圧力に対する値
よりも高い場合に、吸引流体が再蒸発し更にその再蒸発
蒸気の崩壊による所謂キャビテ―ション現象により、著
しい騒音を生じるものである。SUMMARY OF THE INVENTION In the above conventional one,
There has been a problem that when suctioning to the ejector section, the suction fluid causes a significant noise. In the suction chamber of the ejector, a vacuum suction force is generated which is almost equal to the saturation pressure with respect to the temperature of the fluid circulating in the ejector.However, the saturation temperature of the suction fluid from the outside to the ejector is higher than the value for the saturation pressure. When the value is high, the suction fluid re-evaporates, and further, the so-called cavitation phenomenon due to the collapse of the re-evaporated vapor causes remarkable noise.
【0004】この騒音は、周辺への騒音となるばかりで
なく、機器への振動を伴い劣化や損傷の要因となるので
ある。This noise not only becomes noise to the surroundings but also causes deterioration and damage accompanied by vibration to the equipment.
【0005】従って本発明の技術的課題は、キャビテ―
ション現象を防止して騒音を生じることのないエゼクタ
真空ポンプを得ることである。Therefore, the technical problem of the present invention is that the cavitation
It is to obtain an ejector vacuum pump that prevents the noise phenomenon and does not generate noise.
【0006】[0006]
【課題を解決するための手段】上記の技術的課題を解決
するために講じた本発明の技術的手段は、エゼクタの入
口側を液体圧送ポンプ手段を介してタンクと接続したも
のにおいて、エゼクタの吸込み室の近傍に、エゼクタの
吸引力と圧力設定手段とのバランスにより開閉弁する圧
力調整弁を取り付けて、該圧力調整弁の出口側を上記エ
ゼクタの吸込み室と連通し入口側を大気と連通したもの
である。Means for Solving the Problems The technical means of the present invention taken to solve the above-mentioned technical problem is one in which the inlet side of an ejector is connected to a tank through a liquid pressure pump means, A pressure control valve that opens and closes by a balance between the suction force of the ejector and the pressure setting means is installed near the suction chamber, and the outlet side of the pressure control valve communicates with the suction chamber of the ejector and the inlet side communicates with the atmosphere. It was done.
【0007】[0007]
【作用】上記の技術的手段の作用は下記の通りである。
エゼクタの真空吸引力と圧力設定手段とのバランスによ
り開閉する圧力調整弁を取り付けたことにより、エゼク
タの真空吸引力が圧力設定手段の設定圧力よりも高まる
と圧力調整弁が開弁してその入出口を介して大気をエゼ
クタ部へ供給することにより、エゼクタの真空吸引力は
低下する。The operation of the above technical means is as follows.
By installing a pressure adjustment valve that opens and closes depending on the balance between the vacuum suction force of the ejector and the pressure setting means, when the vacuum suction force of the ejector becomes higher than the set pressure of the pressure setting means, the pressure adjustment valve opens and turns on. By supplying the atmosphere to the ejector section through the outlet, the vacuum suction force of the ejector is reduced.
【0008】圧力調整弁の設定圧力を吸引流体の温度に
対する飽和圧力よりも所定値だけ低い値とすることによ
り、エゼクタの真空吸引力は吸引流体の飽和圧力よりも
所定値だけ低いものとなり、この所定圧力値が小さけれ
ば小さいほど流体の吸引力は低下するがキャビテ―ショ
ン現象も生じにくくなり、従って、著しい騒音を防止す
ることができる。By setting the set pressure of the pressure regulating valve to a value lower than the saturation pressure with respect to the temperature of the suction fluid by a predetermined value, the vacuum suction force of the ejector becomes lower than the saturation pressure of the suction fluid by a predetermined value. The smaller the predetermined pressure value is, the lower the suction force of the fluid is, but the cavitation phenomenon is less likely to occur, so that the significant noise can be prevented.
【0009】[0009]
【実施例】上記の技術的手段の具体例を示す実施例を説
明する。図1において、エゼクタ1とタンク2と液体圧
送ポンプ手段としての渦巻きポンプ3と圧力調整弁4と
でエゼクタ真空ポンプを構成する。エゼクタ1の吸込み
室5に吸引通路30を接続すると共に、圧力調整弁4を
通路31を介して接続する。EXAMPLES Examples showing specific examples of the above technical means will be described. In FIG. 1, an ejector 1, a tank 2, a centrifugal pump 3 as a liquid pressure pumping means, and a pressure adjusting valve 4 constitute an ejector vacuum pump. The suction passage 30 is connected to the suction chamber 5 of the ejector 1, and the pressure regulating valve 4 is connected via the passage 31.
【0010】エゼクタ1は、内部にノズル部を有した吸
込み室5とディフュ―ザ6とを接続して構成する。タン
ク2にはオ―バ―フロ―管7を取り付けると共に、弁8
を介して冷却液供給管9を接続する。渦巻きポンプ3の
吸引口10をタンク2の下部に接続し、吐出口11をエ
ゼクタ1と接続する。タンク2の液体を渦巻きポンプ3
でエゼクタ1内に供給循環して吸込み室5で真空吸引力
を得るものである。吸込み室5で生じる真空吸引力は、
エゼクタ1内を通過する液体の温度に対する飽和圧力と
ほぼ等しくなり、従って、タンク2内の液温を調節する
ことにより吸込み室5での真空吸引力を調節することが
できるものである。The ejector 1 is constituted by connecting a suction chamber 5 having a nozzle portion inside and a diffuser 6. An overflow pipe 7 is attached to the tank 2 and a valve 8 is attached.
The cooling liquid supply pipe 9 is connected via. The suction port 10 of the centrifugal pump 3 is connected to the lower part of the tank 2, and the discharge port 11 is connected to the ejector 1. Volute pump 3 for liquid in tank 2
In order to obtain a vacuum suction force in the suction chamber 5 by supplying and circulating it in the ejector 1. The vacuum suction force generated in the suction chamber 5 is
The saturated pressure with respect to the temperature of the liquid passing through the ejector 1 becomes almost equal, and therefore the vacuum suction force in the suction chamber 5 can be adjusted by adjusting the liquid temperature in the tank 2.
【0011】圧力調整弁4は図2に概略図を示すよう
に、入口12と弁口13と出口14を有し、弁口13の
下方に弁体15を配置し、弁体15とダイヤフラム16
を弁棒17で接続したものである。ダイヤフラム16の
下部室18を貫通孔19を介して出口14と連通し、ダ
イヤフラム16の上部に引張状態のコイルバネ20を配
置して、このコイルバネ20の引張力を調節ねじ21に
より外部から調節することによりダイヤフラム16を上
方へ引き上げる荷重を調節することができ、設定圧力を
調節するものである。図1における通路31を出口14
と接続し、入口12は大気と連通する。As shown in the schematic view of FIG. 2, the pressure regulating valve 4 has an inlet 12, a valve opening 13 and an outlet 14, a valve element 15 is arranged below the valve opening 13, a valve element 15 and a diaphragm 16 are provided.
Are connected by the valve rod 17. The lower chamber 18 of the diaphragm 16 is communicated with the outlet 14 through the through hole 19, the coil spring 20 in a tensioned state is arranged above the diaphragm 16, and the tension force of the coil spring 20 is externally adjusted by the adjusting screw 21. The load for pulling the diaphragm 16 upward can be adjusted by adjusting the set pressure. The passage 31 in FIG.
And the inlet 12 communicates with the atmosphere.
【0012】次に作用を説明する。圧力調整弁4の調節
ねじ21を回転してコイルバネ20の引張力を調節する
ことにより、圧力調整弁4の設定圧力を所望値に設定す
る。この所望値とは例えば通路30を介しての吸引流体
の温度に対する飽和圧力が200ト―ル程度である場合
には180ト―ル程度として僅かに低い値とする。渦巻
きポンプ3の駆動によりエゼクタ1に流体が循環して吸
込み室5に真空吸引力が生じ、この真空吸引力が200
ト―ルあるいは180ト―ルよりも更に低い場合は、圧
力調整弁4がなければ通路30からの吸引流体はエゼク
タ1部においてキャビテ―ション現象を生じて著しい騒
音を生じるが、圧力調整弁4を取り付けたことによりエ
ゼクタ1部は大気を吸入して180ト―ルに維持され、
吸引力が確保されると共に再蒸発蒸気の崩壊も少なくな
り著しい騒音を生じることがなくなる。Next, the operation will be described. By rotating the adjusting screw 21 of the pressure adjusting valve 4 to adjust the tensile force of the coil spring 20, the set pressure of the pressure adjusting valve 4 is set to a desired value. The desired value is, for example, about 180 tons and a slightly low value when the saturation pressure with respect to the temperature of the suction fluid through the passage 30 is about 200 torr. The fluid is circulated through the ejector 1 by driving the centrifugal pump 3 to generate a vacuum suction force in the suction chamber 5, and the vacuum suction force is 200
If the pressure is lower than the toor or 180 torr, the suction fluid from the passage 30 causes a cavitation phenomenon in the ejector 1 portion and causes a remarkable noise if the pressure regulating valve 4 is not provided. By attaching the, the ejector 1 part inhales the atmosphere and is maintained at 180 torr,
The suction force is secured and the re-evaporated vapor is less likely to collapse, so that no significant noise is generated.
【0013】[0013]
【発明の効果】上記のように本発明によれば、エゼクタ
の真空吸引力を圧力調整弁から大気を供給することによ
り、吸引流体の飽和圧力より所定値だけ低いものとする
ことにより、キャビテ―ション現象を防止して著しい騒
音を生じることのないエゼクタ真空ポンプを得ることが
できる。As described above, according to the present invention, the vacuum suction force of the ejector is made lower than the saturation pressure of the suction fluid by a predetermined value by supplying the atmosphere from the pressure adjusting valve to the cavity. It is possible to obtain an ejector vacuum pump that prevents the vibration phenomenon and does not generate significant noise.
【図1】本発明のエゼクタ真空ポンプの実施例の構成図
である。FIG. 1 is a configuration diagram of an embodiment of an ejector vacuum pump of the present invention.
【図2】本発明のエゼクタ真空ポンプに用いた圧力調整
弁の概略図である。FIG. 2 is a schematic view of a pressure control valve used in the ejector vacuum pump of the present invention.
1 エゼクタ 2 タンク 3 渦巻きポンプ 4 圧力調整弁 5 吸込み室 12 入口 14 出口 16 ダイヤフラム 20 コイルバネ 21 調節ねじ 1 Ejector 2 Tank 3 Volute Pump 4 Pressure Control Valve 5 Suction Chamber 12 Inlet 14 Outlet 16 Diaphragm 20 Coil Spring 21 Adjusting Screw
Claims (1)
を介してタンクと接続したものにおいて、エゼクタの吸
込み室の近傍に、エゼクタの吸引力と圧力設定手段との
バランスにより開閉弁する圧力調整弁を取り付けて、該
圧力調整弁の出口側を上記エゼクタの吸込み室と連通し
入口側を大気と連通したことを特徴とするエゼクタ真空
ポンプ。1. A pressure control valve, wherein an inlet side of an ejector is connected to a tank via a liquid pressure pump means, the valve being opened and closed near a suction chamber of the ejector by a balance between the suction force of the ejector and the pressure setting means. The ejector vacuum pump, wherein an outlet side of the pressure regulating valve is connected to the suction chamber of the ejector and an inlet side is connected to the atmosphere.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP07140294A JP3620870B2 (en) | 1994-03-15 | 1994-03-15 | Ejector vacuum pump |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP07140294A JP3620870B2 (en) | 1994-03-15 | 1994-03-15 | Ejector vacuum pump |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH07253100A true JPH07253100A (en) | 1995-10-03 |
JP3620870B2 JP3620870B2 (en) | 2005-02-16 |
Family
ID=13459493
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP07140294A Expired - Fee Related JP3620870B2 (en) | 1994-03-15 | 1994-03-15 | Ejector vacuum pump |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3620870B2 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005226562A (en) * | 2004-02-13 | 2005-08-25 | Tlv Co Ltd | Vacuum pump device |
JP2005226563A (en) * | 2004-02-13 | 2005-08-25 | Tlv Co Ltd | Vacuum pump device |
JP2008169798A (en) * | 2007-01-15 | 2008-07-24 | Tlv Co Ltd | Ejector type vacuum pump |
JP2010249027A (en) * | 2009-04-15 | 2010-11-04 | Tlv Co Ltd | Ejector vacuum pump |
JP2010249026A (en) * | 2009-04-15 | 2010-11-04 | Tlv Co Ltd | Ejector vacuum pump |
CN103244468A (en) * | 2013-04-17 | 2013-08-14 | 武汉大学 | Ejecting-type jet flow cavitation generator and cavitation cell disruption device |
-
1994
- 1994-03-15 JP JP07140294A patent/JP3620870B2/en not_active Expired - Fee Related
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005226562A (en) * | 2004-02-13 | 2005-08-25 | Tlv Co Ltd | Vacuum pump device |
JP2005226563A (en) * | 2004-02-13 | 2005-08-25 | Tlv Co Ltd | Vacuum pump device |
JP4550444B2 (en) * | 2004-02-13 | 2010-09-22 | 株式会社テイエルブイ | Vacuum pump device |
JP4550443B2 (en) * | 2004-02-13 | 2010-09-22 | 株式会社テイエルブイ | Vacuum pump device |
JP2008169798A (en) * | 2007-01-15 | 2008-07-24 | Tlv Co Ltd | Ejector type vacuum pump |
JP2010249027A (en) * | 2009-04-15 | 2010-11-04 | Tlv Co Ltd | Ejector vacuum pump |
JP2010249026A (en) * | 2009-04-15 | 2010-11-04 | Tlv Co Ltd | Ejector vacuum pump |
CN103244468A (en) * | 2013-04-17 | 2013-08-14 | 武汉大学 | Ejecting-type jet flow cavitation generator and cavitation cell disruption device |
Also Published As
Publication number | Publication date |
---|---|
JP3620870B2 (en) | 2005-02-16 |
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