JPH0820288B2 - Vortex flowmeter - Google Patents

Vortex flowmeter

Info

Publication number
JPH0820288B2
JPH0820288B2 JP1129334A JP12933489A JPH0820288B2 JP H0820288 B2 JPH0820288 B2 JP H0820288B2 JP 1129334 A JP1129334 A JP 1129334A JP 12933489 A JP12933489 A JP 12933489A JP H0820288 B2 JPH0820288 B2 JP H0820288B2
Authority
JP
Japan
Prior art keywords
vortex
conduit
generator
rectifier
turbulent flow
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.)
Expired - Lifetime
Application number
JP1129334A
Other languages
Japanese (ja)
Other versions
JPH02307015A (en
Inventor
嘉彦 谷村
久人 石黒
靖夫 多田
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.)
Mitsubishi Electric Corp
Mitsubishi Motors Corp
Original Assignee
Mitsubishi Electric Corp
Mitsubishi Motors 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 Mitsubishi Electric Corp, Mitsubishi Motors Corp filed Critical Mitsubishi Electric Corp
Priority to JP1129334A priority Critical patent/JPH0820288B2/en
Priority to AU55825/90A priority patent/AU621755B2/en
Priority to SU904743989A priority patent/RU2022961C1/en
Priority to US07/527,506 priority patent/US5052229A/en
Priority to DE4016673A priority patent/DE4016673A1/en
Publication of JPH02307015A publication Critical patent/JPH02307015A/en
Priority to KR2019930025563U priority patent/KR940000704Y1/en
Publication of JPH0820288B2 publication Critical patent/JPH0820288B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は車両等の内燃機関に用いられ、特に流れの
乱れの大きい流体を測定するための渦流量計に関するも
のである。Description: TECHNICAL FIELD The present invention relates to an eddy flow meter used for an internal combustion engine such as a vehicle, and particularly for measuring a fluid having a large flow turbulence.

〔従来の技術〕[Conventional technology]

車両等の内燃機関に渦流量計が用いられる場合は、例
えば特開昭58−21517号公報や特公昭62−26686号公報に
開示されているように、必ず機関のエアクリーナの下流
側に取付けられる。このような構成においては、流体の
流れの安定性が低いため低流量から高流量まで精度よく
計測できないという問題があった。このため、例えば特
開昭61−134620号公報までは渦発生柱の上流側に流体の
一部に乱れを発生させる乱流発生体を配置し、渦の発生
の安定性向上を計ることが提案されている。When an vortex flowmeter is used in an internal combustion engine of a vehicle or the like, it is always installed on the downstream side of the air cleaner of the engine, as disclosed in, for example, JP-A-58-21517 and JP-B-62-26686. . In such a configuration, there is a problem in that it is not possible to accurately measure from a low flow rate to a high flow rate because the stability of the fluid flow is low. Therefore, for example, in JP-A-61-134620, it has been proposed to arrange a turbulent flow generator that generates turbulence in a part of the fluid upstream of the vortex generation column to improve the stability of vortex generation. Has been done.

〔発明が解決しようとする課題〕[Problems to be Solved by the Invention]

しかしながら、上記のよる方法では例えば特開昭57−
67863号公報に記述してあるように乱流発生体は渦発生
柱によって決まるべき渦周波数、すなわち流量特性を補
正できるほどの強い影響を有しているため、乱流発生体
が発生する渦が柱状でかつ、周期的ないわゆるカルマン
渦になりやすい場合、渦発生体で流量特性に与える影響
が大きいので、乱流発生体の形状寸法や配置精度を厳し
く要求されていた。However, in the method according to the above, for example, JP-A-57-
As described in Japanese Patent No. 67863, the turbulent flow generator has a strong influence enough to correct the vortex frequency that should be determined by the vortex generation column, that is, the flow rate characteristic. When a columnar and periodic so-called Karman vortex is likely to occur, the vortex generator has a great influence on the flow rate characteristics, so that the dimensional and arrangement accuracy of the turbulence generator are strictly required.

この発明は上記のような課題を解消するためになされ
たもので、安定した渦発生が得られると共に、安価で高
精度な渦流量計を得ることを目的とする。The present invention has been made to solve the above problems, and an object thereof is to obtain a stable vortex generation and to obtain an inexpensive and highly accurate vortex flowmeter.

〔課題を解決するための手段〕[Means for solving the problem]

この発明に係る渦流量計は、被測定流体の流れる主導
管および副導管を有し、主導管内にカルマン渦を発生さ
せる渦発生柱と、上記主導管の入口側にハニカム状ある
いは網目状の整流器と、上記副導管の入口側にその通路
断面積を規制する調整部材をと、上記整流器を上記主導
管の入口開口部に支持する固定部材とを備えた渦流量計
において、上記整流器の入口面側に上記渦発生柱の中心
軸線上で、かつこれと平行に被測定流体の流れを阻害す
る乱流発生体を配置し、この乱流発生体と上記調整部材
とを上記固定部材に一体に成形したことを特徴とする。A vortex flowmeter according to the present invention has a main conduit and a sub conduit through which a fluid to be measured flows, a vortex generating column for generating a Karman vortex in the main conduit, and a honeycomb or mesh rectifier at an inlet side of the main conduit. In the vortex flowmeter comprising: an adjusting member for restricting a passage cross-sectional area on the inlet side of the sub-conduit; and a fixing member for supporting the rectifier at the inlet opening of the main conduit, an inlet surface of the rectifier. A turbulence generator that obstructs the flow of the fluid to be measured is arranged on the side of the central axis of the vortex generating column and in parallel with the vortex generator, and the turbulence generator and the adjusting member are integrated with the fixing member. It is characterized by being molded.

〔作 用〕[Work]

この発明においては、渦発生柱の上流側に乱流発生体
を設けたことで、流体の一部に乱流を発生させ、これに
よって渦発生柱の下流に生じるカルマン渦を安定化し、
揺らぎの少ない渦を得ることができる。In the present invention, by providing the turbulent flow generator on the upstream side of the vortex generating column, turbulent flow is generated in a part of the fluid, thereby stabilizing the Karman vortex generated downstream of the vortex generating column,
You can get a vortex with less fluctuation.

〔実施例〕〔Example〕

以下、この発明の一実施例を図について説明する。第
１図はこの発明による渦流量計の横断平面図、第２図は
第１図のII−II線断面図、第３図は渦流量計を流体入口
側より見た正面図、第４図は第１図のIV−IV線断面図を
示し、各図において、渦流量計は主導管１と副導管２と
からなる。３は主導管１内に配置した渦発生柱で、上流
側渦発生柱31と下流側渦発生柱32から構成されている。
４は上記主導管１の流体入口側の開口部に取付けたハニ
カム形状の整流器、７は副導管２の流体入口側の開口部
に取付けた同じくハニカム形状の整流器で、これら整流
器4,7は固定部材5bおよびリベット６によって支持され
ている。5aは上記整流器４の入口面側で、上記渦発生柱
３の中心と一致した位置にあり、かつこれと平行に設け
た乱流発生体、5cは上記固定部材5bおよび乱流発生体5a
と一体的に設けられ、上記副導管７の通路断面積を規制
する調整部材である。An embodiment of the present invention will be described below with reference to the drawings. 1 is a cross-sectional plan view of the vortex flowmeter according to the present invention, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, and FIG. 3 is a front view of the vortex flowmeter viewed from the fluid inlet side, FIG. Shows a sectional view taken along the line IV-IV in FIG. 1, and in each drawing, the vortex flowmeter comprises a main conduit 1 and a subsidiary conduit 2. Reference numeral 3 denotes a vortex generating column disposed in the main conduit 1, which is composed of an upstream vortex generating column 31 and a downstream vortex generating column 32.
4 is a honeycomb rectifier attached to the fluid inlet side opening of the main conduit 1, 7 is a honeycomb rectifier attached to the fluid inlet side opening of the auxiliary conduit 2, and these rectifiers 4 and 7 are fixed. It is supported by the member 5b and the rivet 6. 5a is a turbulent flow generator provided on the inlet face side of the rectifier 4 at a position coinciding with the center of the vortex generating column 3 and in parallel with it, and 5c is the fixing member 5b and the turbulent flow generator 5a.
Is an adjusting member that is provided integrally with the above and regulates the cross-sectional area of the passage of the sub-conduit 7.

次に動作について説明する。第１図において、流体が
F1〜F3が示す流れを有していると、主導管１内の渦発生
柱３の直上流の流体はf1,f21,f22,f3に示す流れとな
り、渦発生柱３の後流にカルマン渦ｖが発生する。ここ
で、乱流発生体5aがない場合は破線で示す流体f2が流体
f1,f3と平行に生じることになるが、乱流発生体5aが存
在すると流体F2は乱流発生体5aの直後より乱れが発生す
る。そして、流体f21,f22で囲まれる領域Ｅは乱流域で
ある。Next, the operation will be described. In FIG. 1, the fluid is
When the flow indicated by F 1 to F 3 is present, the fluid immediately upstream of the vortex generating column 3 in the main conduit 1 becomes the flow indicated by f 1 , f 21 , f 22 , and f 3 , and the vortex generating column 3 A Karman vortex v is generated in the wake of. Here, if there is no turbulent flow generator 5a, the fluid f 2 indicated by the broken line is
Although it occurs in parallel with f 1 and f 3 , when the turbulent flow generator 5a is present, the fluid F 2 is turbulent immediately after the turbulent flow generator 5a. A region E surrounded by the fluids f 21 and f 22 is a turbulent flow region.

渦発生柱３に衝突する流体に乱れがあるとカルマン渦
が発生しやすいことは周知のことである。ここで、上記
した乱流域Ｅの乱流状態を説明する。乱流発生体5aの後
流の渦は流れに対して直角断面では渦柱状となる。また
渦はいわゆるカルマン渦である。しかし、乱流発生体5a
の直後の整流器４によって直角断面方向に流れが分断さ
れるため、第４図に示すvf2に示す流速分布にて明らか
なように渦柱はくずされる。したがって乱流域Ｅ内は流
れに平行面および直角面のいずれの方向にも乱れること
になる。このため、乱流発生体5aの発生する乱流が渦発
生柱３のカルマン渦発生のトリガ的要素となるのみで、
渦発生柱３のカルマン渦発生周期に大きく拘わることが
ない。したがって、乱流発生体5aの幅寸法ｄが多少変化
しても渦発生柱３によって決定されるカルマン渦発生周
期を乱すことがないため、乱流発生体5aの寸法精度を高
める必要はなくなる。It is well known that Karman vortices are easily generated when the fluid colliding with the vortex generating column 3 is disturbed. Here, the turbulent flow state of the turbulent flow region E will be described. The vortex of the wake of the turbulent flow generator 5a becomes a vortex column in a cross section perpendicular to the flow. The vortex is the so-called Karman vortex. However, turbulence generator 5a
Since the flow is divided in the direction of the right-angled cross section by the rectifier 4 immediately after, the vortex column is broken as apparent from the flow velocity distribution indicated by v f2 shown in FIG. Therefore, the inside of the turbulent flow region E is disturbed in both directions parallel to and perpendicular to the flow. Therefore, the turbulent flow generated by the turbulent flow generator 5a is only a trigger element for the Karman vortex generation of the vortex generation column 3,
The Karman vortex generation period of the vortex generation column 3 is not largely concerned. Therefore, even if the width dimension d of the turbulent flow generator 5a is slightly changed, the Karman vortex generation cycle determined by the vortex generation column 3 is not disturbed, and it is not necessary to improve the dimensional accuracy of the turbulent flow generator 5a.

ここで、第５図に乱流発生体5aの寸法ｄと渦発生柱３
の寸法Ｄによるカルマン渦の発生周期の安定性すなわ
ち、渦の揺らぎ率を示す。この図から実線はこの発明に
よるd/Dと揺らぎ率変化を示し、破線は従来装置による
揺らぎ率を示す。Here, the dimension d of the turbulent flow generator 5a and the vortex generating column 3 are shown in FIG.
The stability of the generation period of the Karman vortex according to the dimension D of, that is, the fluctuation rate of the vortex is shown. From this figure, the solid line shows d / D and fluctuation rate according to the present invention, and the broken line shows fluctuation rate according to the conventional device.

また、第２図および第３図で明らかなように乱流発生
体5aは渦流量計の副導管２通路断面積を規制する調整部
材5cと一体に作られている。この調整部材5cは渦流量計
の流量特性を略平行的に移行させる機能を有し、一般的
に用いられるものであり、第３図に示すように幅ｈが調
整寸法となる。したがって上記乱流発生体5aが調整部材
5cと一体的に成形されれば、乱流発生体5aの支持部材は
不要となり、また、乱流発生体5aとして特別な部材を用
意することもない。さらに、上記乱流発生体5aおよび調
整部材5cと整流器4,7を固定する固定部材5bとを一体成
形すれば、部品点数を大幅に削減でき、この結果、渦流
量計の製作および組立てが容易となる。Further, as is clear from FIGS. 2 and 3, the turbulent flow generator 5a is formed integrally with the adjusting member 5c for restricting the cross sectional area of the passage of the auxiliary conduit 2 of the vortex flowmeter. The adjusting member 5c has a function of shifting the flow rate characteristics of the vortex flowmeter substantially in parallel and is generally used, and the width h is an adjustment dimension as shown in FIG. Therefore, the turbulent flow generator 5a is an adjusting member.
If it is formed integrally with 5c, the support member for the turbulent flow generator 5a becomes unnecessary, and no special member is prepared as the turbulent flow generator 5a. Furthermore, if the turbulent flow generator 5a and the adjusting member 5c and the fixing member 5b that fixes the rectifiers 4 and 7 are integrally formed, the number of parts can be significantly reduced, and as a result, the vortex flowmeter can be easily manufactured and assembled. Becomes

なお、本実施例では整流器4,7はハニカム形状のもの
を使用した例について説明したが、その他、網目状の整
流器であても上記同様の作用が得られる。In the present embodiment, an example in which the rectifiers 4 and 7 have a honeycomb shape has been described, but the same effect as above can be obtained with a mesh rectifier.

〔発明の効果〕〔The invention's effect〕

以上説明したようにこの発明によれば、主導管内に配
置した渦発生柱の上流で整流器の入口面側に乱流発生体
を配置し、この乱流発生体と副導管の通路断面積を規制
する調整部材とを整流器を主導管に支持する固定部材に
一体に成形したので、流量特性がら流流発生体の寸法精
度によって大きく影響を受けることなく、しかも、渦発
生柱の上流の流れに乱れがあっても渦の揺らぎの少ない
高精度で安価な渦流量計となる。また、乱流発生体と調
整部材とを一体成形したことで、部品点数が削減し製作
および組立ての手数を軽減できる。As described above, according to the present invention, the turbulence generator is arranged on the inlet face side of the rectifier upstream of the vortex generating column arranged in the main conduit, and the passage cross-sectional area of the turbulence generator and the auxiliary conduit is regulated. Since the adjusting member and the fixing member that supports the rectifier to the main conduit are integrally formed, the flow characteristics are not greatly affected by the dimensional accuracy of the flow generator, and the flow is disturbed by the flow upstream of the vortex generating column. Even if there is, it becomes a highly accurate and inexpensive vortex flowmeter with little vortex fluctuation. Further, since the turbulent flow generator and the adjusting member are integrally formed, the number of parts can be reduced and the number of manufacturing and assembling steps can be reduced.

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

第１図はこの発明の一実施例による渦流量計の横断平面
図、第２図は第１図のII−II線断面図、第３図は渦流量
計を入口側から見た正面図、第４図は第１図のIV−IV線
断面図、第５図は渦の揺らぎ率の特性図である。 ２……主導管、２……副導管、３……渦発生柱、4,7…
…整流器、5a……乱流発生体、5c……調整部材。 なお、図中同一符号は同一又は相当部分を示す。1 is a cross-sectional plan view of a vortex flowmeter according to an embodiment of the present invention, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, and FIG. 3 is a front view of the vortex flowmeter as viewed from the inlet side. FIG. 4 is a sectional view taken along the line IV-IV in FIG. 1, and FIG. 5 is a characteristic diagram of the fluctuation rate of the vortex. 2 ... Main conduit, 2 ... Sub conduit, 3 ... Vortex generating column, 4,7 ...
… Rectifier, 5a… Turbulence generator, 5c… Adjusting member. The same reference numerals in the drawings indicate the same or corresponding parts.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 多田 靖夫 兵庫県姫路市千代田町840番地 三菱電機 株式会社姫路製作所内 (56)参考文献 特開 昭63−180819（ＪＰ，Ａ) 特開 昭51−81154（ＪＰ，Ａ) 特開 昭61−10718（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuo Tada 840 Chiyoda-cho, Himeji City, Hyogo Prefecture Mitsubishi Electric Corporation Himeji Manufacturing (56) References JP 63-180819 (JP, A) JP 51- 81154 (JP, A) JP-A-61-1718 (JP, A)

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】被測定流体の流れる主導管および副導管を
有し、主導管内にカルマン渦を発生させる渦発生柱と、
上記主導管の入口側にハニカム状あるいは網目状の整流
器と、上記副導管の入口側にその通路断面積を規制する
調整部材と、上記整流器を上記主導管の入口開口部に支
持する固定部材とを備えた渦流量計において、上記整流
器の入口面側に上記渦発生柱の中心軸線上で、かつこれ
と平行に被測定流体の流れを阻害する乱流発生体を配置
し、この乱流発生体と上記調整部材とを上記固定部材に
一体に成形したことを特徴とする渦流量計。1. A vortex generating column having a main conduit and a sub conduit through which a fluid to be measured flows, and generating a Karman vortex in the main conduit,
A honeycomb or mesh rectifier on the inlet side of the main conduit, an adjusting member for regulating the passage cross-sectional area on the inlet side of the auxiliary conduit, and a fixing member for supporting the rectifier at the inlet opening of the main conduit. In the vortex flowmeter equipped with, a turbulence generator that obstructs the flow of the fluid to be measured is arranged on the inlet side of the rectifier on the central axis of the vortex generator column and parallel to this, and the turbulence generation is performed. A vortex flowmeter, wherein the body and the adjusting member are integrally formed with the fixing member.
JP1129334A 1989-05-23 1989-05-23 Vortex flowmeter Expired - Lifetime JPH0820288B2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP1129334A JPH0820288B2 (en) 1989-05-23 1989-05-23 Vortex flowmeter
AU55825/90A AU621755B2 (en) 1989-05-23 1990-05-22 Vortex flowmeter
SU904743989A RU2022961C1 (en) 1989-05-23 1990-05-22 Method of synthesis of phenol derivatives or their pharmacologically acceptable acid-additive salts
US07/527,506 US5052229A (en) 1989-05-23 1990-05-23 Vortex flowmeter
DE4016673A DE4016673A1 (en) 1989-05-23 1990-05-23 Vortex flow measuring device
KR2019930025563U KR940000704Y1 (en) 1989-05-23 1993-11-30 Turbulence flow meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1129334A JPH0820288B2 (en) 1989-05-23 1989-05-23 Vortex flowmeter

Publications (2)

Publication Number Publication Date
JPH02307015A JPH02307015A (en) 1990-12-20
JPH0820288B2 true JPH0820288B2 (en) 1996-03-04

Family

ID=15007037

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1129334A Expired - Lifetime JPH0820288B2 (en) 1989-05-23 1989-05-23 Vortex flowmeter

Country Status (1)

Country Link
JP (1) JPH0820288B2 (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5181154A (en) * 1975-01-10 1976-07-15 Yokogawa Electric Works Ltd RYUSOKUSOKUTEISOCHI
JPH0711438B2 (en) * 1987-01-22 1995-02-08 日本電装株式会社 Air flowmeter with rectifying grid

Also Published As

Publication number Publication date
JPH02307015A (en) 1990-12-20

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