JPH11295333A - Particle feed apparatus - Google Patents

Particle feed apparatus

Info

Publication number
JPH11295333A
JPH11295333A JP10098673A JP9867398A JPH11295333A JP H11295333 A JPH11295333 A JP H11295333A JP 10098673 A JP10098673 A JP 10098673A JP 9867398 A JP9867398 A JP 9867398A JP H11295333 A JPH11295333 A JP H11295333A
Authority
JP
Japan
Prior art keywords
particles
charging belt
particle
air
charging
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
JP10098673A
Other languages
Japanese (ja)
Inventor
Hiromichi Matsui
浩路 松井
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.)
IHI Corp
Original Assignee
IHI Corp
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 IHI Corp filed Critical IHI Corp
Priority to JP10098673A priority Critical patent/JPH11295333A/en
Publication of JPH11295333A publication Critical patent/JPH11295333A/en
Pending legal-status Critical Current

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  • Measuring Volume Flow (AREA)
  • Belt Conveyors (AREA)

Abstract

PROBLEM TO BE SOLVED: To obtain a particle feed apparatus by which tracer particles used to reflect laser light can be fed at a uniform density up to a high density from a low density by sorting only fine particles and in which their density can be adjusted easily. SOLUTION: A particle container 12 in which tracer particles as fine particles are held and whose upper part is opened is provided. A mesh-shaped charging belt 14 which is turned endlessly between the inside of the particle container 12 and a space (a separating space 13) in its upper part is provided. A charging device 16 which applies a voltage across the particle container 12 and the charging belt 14 and which charges one to be positive and which charges the other to be negative is provided. An air nozzle 18 which jets air to the charging belt 14 in the separating space 13 is provided. Then, the particles are stuck to the charging belt 14 due to static electricity, and the particles are separated from the charging belt 14 by the jetted air.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、レーザを用いた流
体計測等に適用する粒子供給装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a particle supply apparatus applied to fluid measurement using a laser.

【0002】[0002]

【従来の技術】レーザ・ドップラ・ベロシメータ(LD
V)と呼ばれるレーザ速度計測装置を用い、コンプレッ
サやタービンの翼まわりの流速分布等を計測することが
従来から行われている。この計測手段では、図2に模式
的に示すように、対象物1(例えば、タービン翼)のま
わりに空気2を流し、その流れ内にトレーサ粒子3を含
んだ空気(トレーサ流4)を混入させ、LDV5でレー
ザ光を計測箇所に照射しかつその反射光を受光して、ド
ップラ効果を利用して計測箇所の流速分布を計測するよ
うになっている。
2. Description of the Related Art Laser Doppler Velocimeter (LD)
2. Description of the Related Art Conventionally, a laser velocity measuring device called V) is used to measure a flow velocity distribution around a compressor or a turbine blade. In this measuring means, as schematically shown in FIG. 2, air 2 flows around an object 1 (for example, a turbine blade), and air containing tracer particles 3 (tracer flow 4) is mixed into the flow. Then, the LDV 5 irradiates a laser beam to the measurement location and receives the reflected light, and measures the flow velocity distribution at the measurement location using the Doppler effect.

【0003】かかるトレーサ粒子3には、例えば、ホワ
イト・カーボンと呼ばれるシリコン系の微粒子が用いら
れる。また、気流中にトレーサ粒子3を含ませるために
は、図2に例示するローラ型粒子供給装置6やスクリュ
ー型粒子供給装置が従来から用いられている。
As the tracer particles 3, for example, silicon-based fine particles called white carbon are used. Further, in order to include the tracer particles 3 in the airflow, a roller-type particle supply device 6 and a screw-type particle supply device illustrated in FIG. 2 are conventionally used.

【0004】[0004]

【発明が解決しようとする課題】ローラ型粒子供給装置
6は、1対のローラ6aを内向きに回転させ、その間隙
からトレーサ粒子3を重力落下させて空気流4に混入さ
せるものである。しかし、この装置では、粒子の供給量
は、ローラ6aの間隔、回転速度、空気供給圧(又はそ
の流量)で制御されるため、微粒子(トレーサ粒子3)
を高濃度で供給しようとした場合、以下の問題点があっ
た。 ローラ間隔を拡げるとトレーサ粒子3の塊が混入して
しまい、均一供給が困難になる。 ローラ回転速度を上げても、ローラに引き込まれる粒
子量はあまり増加せず、高濃度での供給ができない。 空気供給圧を上げるとトレーサ流4の流量が増して、
計測箇所の流速分布に影響を及ぼすおそれがあり、かつ
全体の流量が増えるだけでトレーサ粒子3の濃度は濃く
ならない。
The roller-type particle supply device 6 rotates a pair of rollers 6a inward and causes the tracer particles 3 to fall by gravity from the gap therebetween to be mixed into the air flow 4. However, in this device, the supply amount of the particles is controlled by the interval between the rollers 6a, the rotation speed, and the air supply pressure (or the flow rate thereof).
However, when attempting to supply high concentration, there were the following problems. If the distance between the rollers is increased, the lump of the tracer particles 3 is mixed, and it becomes difficult to uniformly supply the particles. Even if the rotation speed of the roller is increased, the amount of particles drawn into the roller does not increase so much, and supply at a high concentration cannot be performed. When the air supply pressure is increased, the flow rate of the tracer flow 4 increases,
There is a risk that the flow velocity distribution at the measurement location may be affected, and the concentration of the tracer particles 3 does not increase just because the overall flow rate increases.

【0005】一方、スクリュー型粒子供給装置の場合に
は、粒子供給用のスクリューの回転速度により粒子の供
給量を増減させることができるが、塊の混入が生じやす
く、均一供給が困難であり、かつ濃度調整が困難である
問題点があった。
On the other hand, in the case of a screw-type particle supply device, the supply amount of particles can be increased or decreased by the rotation speed of a screw for supplying particles. In addition, there is a problem that the density adjustment is difficult.

【0006】本発明はかかる問題点を解決するために創
案されたものである。すなわち、本発明の目的は、レー
ザ光を反射させるトレーサ粒子を、微粒子のみを選別し
て低濃度から高濃度まで均一濃度で供給することがで
き、かつ濃度調整が容易にできる粒子供給装置を提供す
ることにある。
The present invention has been made to solve such a problem. That is, an object of the present invention is to provide a particle supply apparatus which can supply tracer particles reflecting laser light at a uniform concentration from a low concentration to a high concentration by selecting only fine particles, and can easily adjust the concentration. Is to do.

【0007】[0007]

【課題を解決するための手段】本発明によれば、微粒の
トレーサ粒子を保有し上方が開口した粒子容器(12)
と、該粒子容器内とその上方の空間(13)との間でエ
ンドレスに回転する網目状の帯電ベルト(14)と、粒
子容器と帯電ベルト間に電圧を印加し一方をプラス、他
方をマイナスに帯電させる帯電装置(16)と、前記空
間に位置する帯電ベルトに空気を噴射する空気ノズル
(18)と、を備え、静電気により帯電ベルトに粒子を
付着させ、噴射空気により粒子を帯電ベルトから離脱さ
せる、ことを特徴とする粒子供給装置が提供される。
According to the present invention, a particle container (12) holding fine tracer particles and having an open top is provided.
A mesh-like charging belt (14) that rotates endlessly between the inside of the particle container and the space (13) above it; a voltage applied between the particle container and the charging belt by applying a voltage between the particle container and the charging belt; And an air nozzle (18) for injecting air onto the charging belt located in the space, causing particles to adhere to the charging belt by static electricity, and ejecting the particles from the charging belt by the jet air. A particle supply device for detaching is provided.

【0008】本発明は、原理的には、微粒化された粒子
ほど、静電化された物体に吸着されやすいことを利用し
ており、微粒化されたものを選別して供給することが可
能となる。すなわち、上記本発明の構成によれば、網
目状の帯電ベルトがトレーサ粒子を攪拌するので、塊の
発生を防ぎ、その微粒化を促進でき、かつ上方に帯電
ベルトが移動する過程で、大きな粒子は落下し、微粒化
された粒子のみが運ばれる。
The present invention utilizes the fact that, in principle, finer particles are more likely to be adsorbed to an electrostatically charged object, and it is possible to selectively supply finer particles. Become. That is, according to the configuration of the present invention, since the mesh-shaped charging belt stirs the tracer particles, the generation of lumps can be prevented, the atomization thereof can be promoted, and large particles are generated in the process of moving the charging belt upward. Falls and only the atomized particles are carried.

【0009】また、微粒化された粒子が静電気により
帯電ベルトに付着するので、網目状の帯電ベルトに高密
度で粒子を付着させることができ、かつ、網目状の帯
電ベルトは表面積が大きいため、より多くの粒子を運ぶ
ことができる。従って、微粒子かつ高密度の大量の粒子
を、噴射空気により帯電ベルトから離脱させることによ
り、高濃度かつ均一なトレーサ粒子を容易に供給でき
る。更に、帯電ベルトの移動速度、帯電装置の電圧、空
気供給圧力、流量を調整することにより、粒子濃度、供
給圧、流量を容易に制御することができる。
Further, since the finely divided particles adhere to the charging belt due to static electricity, the particles can be adhered to the mesh-shaped charging belt at a high density. Further, since the mesh-shaped charging belt has a large surface area, Can carry more particles. Therefore, by separating a large amount of fine particles and high-density particles from the charging belt by the blast air, high-concentration and uniform tracer particles can be easily supplied. Further, by adjusting the moving speed of the charging belt, the voltage of the charging device, the air supply pressure, and the flow rate, the particle concentration, the supply pressure, and the flow rate can be easily controlled.

【0010】[0010]

【発明の実施の形態】以下本発明の好ましい実施形態を
図面を参照して説明する。なお、各図において共通する
部分には同一の符号を付し、重複した説明を省略する。
図1は、本発明による粒子供給装置の全体構成図であ
る。この図において、本発明の粒子供給装置10は、粒
子容器12、網目状の帯電ベルト14、帯電装置16、
及び空気ノズル18からなる。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. In addition, the same reference numerals are given to the common parts in the respective drawings, and the duplicate description will be omitted.
FIG. 1 is an overall configuration diagram of a particle supply device according to the present invention. In this figure, a particle supply device 10 of the present invention includes a particle container 12, a mesh-shaped charging belt 14, a charging device 16,
And an air nozzle 18.

【0011】粒子容器12は、上方が開口した導電性の
容器であり、その内部に微粒のトレーサ粒子3を保有す
る。網目状の帯電ベルト14は、粒子容器12内に設置
された下部プーリ15aとその上方の空間13(分離空
間)に設置された上部プーリ15bとの間で、図示しな
い駆動装置によりエンドレスに回転する。この帯電ベル
ト14は、例えば、金属製のメッシュを多層にしたもの
であり、内部に連通した開口部を有し、静電気で付着し
た粒子をその間に容易に保持できるようになっている。
The particle container 12 is a conductive container having an open upper part, and holds fine tracer particles 3 therein. The mesh-shaped charging belt 14 rotates endlessly by a driving device (not shown) between a lower pulley 15a installed in the particle container 12 and an upper pulley 15b installed in a space 13 (separation space) above the lower pulley 15a. . The charging belt 14 is, for example, a multi-layered metal mesh, has an opening communicating with the inside thereof, and can easily hold particles adhered by static electricity therebetween.

【0012】帯電装置16は、例えば直流電源であり、
粒子容器12と帯電ベルト14の間に電圧(例えば一定
電圧)を印加し一方をプラス、他方をマイナスに帯電さ
せるようになっている。この実施形態では、下部プーリ
15aを介して帯電ベルト14がプラスに帯電され、粒
子容器12を介してトレーサ粒子3がマイナスに帯電す
る。なお、逆に電圧を印加し、帯電ベルト14をマイナ
スに、トレーサ粒子3をプラスに帯電させてもよい。こ
れにより、マイナス(又はプラス)に帯電したトレーサ
粒子3が逆に帯電した帯電ベルト14に付着して帯電ベ
ルト14の回転と共に上方に持ち上げられる。
The charging device 16 is, for example, a DC power supply,
A voltage (for example, a constant voltage) is applied between the particle container 12 and the charging belt 14 so that one is positively charged and the other is negatively charged. In this embodiment, the charging belt 14 is positively charged via the lower pulley 15a, and the tracer particles 3 are negatively charged via the particle container 12. Conversely, a voltage may be applied to charge the charging belt 14 negatively and the tracer particles 3 positively. As a result, the tracer particles 3 charged negatively (or positively) adhere to the oppositely charged charging belt 14 and are lifted upward with the rotation of the charging belt 14.

【0013】空気ノズル18は、上方の空間13(分離
空間)に位置する帯電ベルト14に空気を噴射するよう
になっている。この空気ノズル18は、好ましくは、帯
電ベルト14の最上部に向けて圧縮空気を噴射するのが
よいが、必要により、中間位置の帯電ベルト14に向け
てもよい。この構成により、静電気により帯電ベルト1
4に付着してトレータ粒子3を、噴射空気により帯電ベ
ルトから離脱させて、トレーサ流4として供給すること
ができる。
The air nozzle 18 injects air to the charging belt 14 located in the upper space 13 (separation space). The air nozzle 18 preferably injects compressed air toward the uppermost portion of the charging belt 14, but may also direct the compressed air to the charging belt 14 at an intermediate position if necessary. With this configuration, the charging belt 1 is charged by static electricity.
4 and can be supplied as a tracer stream 4 after being separated from the charging belt by the blast air.

【0014】上述した本発明の構成によれば、網目状
の帯電ベルト14がトレーサ粒子3を攪拌するので、塊
の発生を防ぎ、その微粒化を促進でき、かつ上方に帯
電ベルト14が移動する過程で、大きな粒子は落下し、
微粒化された粒子のみが運ばれる。
According to the configuration of the present invention described above, since the mesh-shaped charging belt 14 stirs the tracer particles 3, it is possible to prevent the formation of lumps, promote the atomization thereof, and move the charging belt 14 upward. In the process, large particles fall,
Only atomized particles are carried.

【0015】また、微粒化された粒子3が静電気によ
り帯電ベルト14に付着するので、網目状の帯電ベルト
に高密度で粒子を付着させることができ、かつ、網目
状の帯電ベルト14は表面積が大きいため、より多くの
粒子を運ぶことができる。従って、微粒子かつ高密度の
大量の粒子を、噴射空気により帯電ベルト14から離脱
させることにより、高濃度かつ均一なトレーサ粒子を容
易に供給できる。更に、帯電ベルトの移動速度、帯電装
置の電圧、空気供給圧力、流量を調整することにより、
粒子濃度、供給圧、流量を容易に制御することができ
る。
Further, since the atomized particles 3 adhere to the charging belt 14 due to static electricity, the particles can be adhered to the mesh-shaped charging belt at a high density, and the mesh-shaped charging belt 14 has a surface area. Larger, can carry more particles. Therefore, by separating a large amount of fine particles and high-density particles from the charging belt 14 by the blast air, high-concentration and uniform tracer particles can be easily supplied. Furthermore, by adjusting the moving speed of the charging belt, the voltage of the charging device, the air supply pressure, and the flow rate,
Particle concentration, supply pressure, and flow rate can be easily controlled.

【0016】なお、本発明は上述した実施形態に限定さ
れるものではなく、発明の要旨を逸脱しない範囲で種々
の変更が可能である。
It should be noted that the present invention is not limited to the above-described embodiment, and various changes can be made without departing from the gist of the invention.

【0017】[0017]

【発明の効果】上述したように、本発明の粒子供給装置
は、レーザ光を反射させるトレーサ粒子を、微粒子のみ
を選別して低濃度から高濃度まで均一濃度で供給するこ
とができ、かつ濃度調整が容易にできる、等の優れた効
果を有する。
As described above, the particle supply apparatus of the present invention can supply tracer particles reflecting laser light at a uniform concentration from a low concentration to a high concentration by selecting only fine particles. It has excellent effects such as easy adjustment.

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

【図1】本発明による粒子供給装置の全体構成図であ
る。
FIG. 1 is an overall configuration diagram of a particle supply device according to the present invention.

【図2】従来の粒子供給装置を用いたレーザ速度計測の
模式図である。
FIG. 2 is a schematic diagram of laser speed measurement using a conventional particle supply device.

【符号の説明】[Explanation of symbols]

1 対象物(タービン翼) 2 空気流 3 トレーサ粒子 4 トレーサ流 5 LDV(レーザ速度計測装置) 6 ロータ型粒子供給装置 6a ローラ 10 粒子供給装置 12 粒子容器 13 空間(分離空間) 14 網目状帯電ベルト 15a,15b プーリー 16 帯電装置 18 空気ノズル DESCRIPTION OF SYMBOLS 1 Object (turbine blade) 2 Air flow 3 Tracer particle 4 Tracer flow 5 LDV (laser velocity measuring device) 6 Rotor type particle supply device 6a Roller 10 Particle supply device 12 Particle container 13 Space (separation space) 14 Reticulated charging belt 15a, 15b Pulley 16 Charging device 18 Air nozzle

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 微粒のトレーサ粒子を保有し上方が開口
した粒子容器(12)と、該粒子容器内とその上方の空
間(13)との間でエンドレスに回転する網目状の帯電
ベルト(14)と、粒子容器と帯電ベルト間に電圧を印
加し一方をプラス、他方をマイナスに帯電させる帯電装
置(16)と、前記空間に位置する帯電ベルトに空気を
噴射する空気ノズル(18)と、を備え、静電気により
帯電ベルトに粒子を付着させ、噴射空気により粒子を帯
電ベルトから離脱させる、ことを特徴とする粒子供給装
置。
1. A reticulated charging belt (14) that rotates endlessly between a particle container (12) holding fine tracer particles and having an open top and a space (13) above and inside the particle container. ), A charging device (16) for applying a voltage between the particle container and the charging belt to charge one side positively and the other side negatively, and an air nozzle (18) for jetting air to the charging belt located in the space. Wherein the particles are attached to the charging belt by static electricity, and the particles are separated from the charging belt by jet air.
JP10098673A 1998-04-10 1998-04-10 Particle feed apparatus Pending JPH11295333A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10098673A JPH11295333A (en) 1998-04-10 1998-04-10 Particle feed apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10098673A JPH11295333A (en) 1998-04-10 1998-04-10 Particle feed apparatus

Publications (1)

Publication Number Publication Date
JPH11295333A true JPH11295333A (en) 1999-10-29

Family

ID=14226044

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10098673A Pending JPH11295333A (en) 1998-04-10 1998-04-10 Particle feed apparatus

Country Status (1)

Country Link
JP (1) JPH11295333A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005265486A (en) * 2004-03-16 2005-09-29 Univ Nihon Measuring process for combustion propagation analysis of fuel and flame spreading, and test method of flame propagation mode of fuel using device
JP2019164012A (en) * 2018-03-19 2019-09-26 京セラ株式会社 Fluid measuring device, fluid measuring method, and program
CN111141928A (en) * 2020-01-21 2020-05-12 中国矿业大学 Tracer agent feeding device and using method thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005265486A (en) * 2004-03-16 2005-09-29 Univ Nihon Measuring process for combustion propagation analysis of fuel and flame spreading, and test method of flame propagation mode of fuel using device
JP2019164012A (en) * 2018-03-19 2019-09-26 京セラ株式会社 Fluid measuring device, fluid measuring method, and program
CN111141928A (en) * 2020-01-21 2020-05-12 中国矿业大学 Tracer agent feeding device and using method thereof
CN111141928B (en) * 2020-01-21 2021-09-21 中国矿业大学 Tracer agent feeding device and using method thereof

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