JPS634974Y2 - - Google Patents

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Publication number
JPS634974Y2
JPS634974Y2 JP9140582U JP9140582U JPS634974Y2 JP S634974 Y2 JPS634974 Y2 JP S634974Y2 JP 9140582 U JP9140582 U JP 9140582U JP 9140582 U JP9140582 U JP 9140582U JP S634974 Y2 JPS634974 Y2 JP S634974Y2
Authority
JP
Japan
Prior art keywords
synthetic resin
resin body
magnet
rotors
bearing
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
Application number
JP9140582U
Other languages
Japanese (ja)
Other versions
JPS58193221U (en
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 filed Critical
Priority to JP9140582U priority Critical patent/JPS58193221U/en
Publication of JPS58193221U publication Critical patent/JPS58193221U/en
Application granted granted Critical
Publication of JPS634974Y2 publication Critical patent/JPS634974Y2/ja
Granted legal-status Critical Current

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  • Measuring Volume Flow (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Description

【考案の詳細な説明】 本考案は、回転子の回転を磁気接手を介して計
数部に伝達するようにした容積型流量計に関する
ものである。
[Detailed Description of the Invention] The present invention relates to a positive displacement flowmeter in which the rotation of a rotor is transmitted to a counting section via a magnetic coupling.

従来、この種の流量計として第1図に示すもの
が知られている。即ち、図中1はケーシングで、
該ケーシング1はケーシング本体1Aとボルト2
により該ケーシング本体1Aに施蓋される蓋体1
Bとからなる。ケーシング1には第1図中紙面上
下方向に被測流体の流入口、流出口(いずれも図
示せず)が形成され、ケーシング1内には計量室
3が設けられている。前記計量室3内には一対の
楕円歯車型回転子4,5が噛合するように設けら
れ、該各回転子4,5の中心孔4A,5Aにはカ
ーボン材を用いた軸受6,7が圧入、打込み等
(以下、圧入という)の手段で固着して設けられ
る。そして、一方の軸受6には該軸受6と中心孔
4Aとの間に位置するようにフエライト、アルニ
コ(商品名)、またはサマリウムコバルト等から
なる主動マグネツト8が該軸受6の外周面と同一
面となるように埋設され、中心孔4Aに対して軸
受6と共に圧入される。9,10は回転子4,5
を回転可能に支持するための支持軸を示し、該各
支持軸9,10はケーシング本体1A、蓋体1B
間に液密に固着されている。前記支持軸9,10
の外周面には軸受6,7の内周面がわずかな間隙
をもつて回転可能に挿通され回転子4,5を軸支
している。ここで、一方の支持軸9は有底状の中
空軸として構成され、該支持軸9内には中空室1
1が形成されている。また、12は回転伝達軸を
示し、該回転伝達軸12の一端は中空室11内に
配設され、その他端には積算カウンタ、パルス発
信器等の計数部(図示せず)が設けられ、かつ回
転軸12の途中は軸受部材13により支承されて
いる。さらに、中空室11内において回転伝達軸
12には主動マグネツト8と対応する位置に従動
マグネツト14が固着され、各マグネツト8,1
4によつて磁気接手を構成している。
Conventionally, as this type of flowmeter, the one shown in FIG. 1 is known. That is, 1 in the figure is the casing,
The casing 1 includes a casing body 1A and a bolt 2.
A lid body 1 that is placed on the casing body 1A by
It consists of B. The casing 1 is formed with an inlet and an outlet (both not shown) for the fluid to be measured in the vertical direction in the plane of the paper in FIG. 1, and a measuring chamber 3 is provided within the casing 1. A pair of oval gear type rotors 4 and 5 are provided in the measuring chamber 3 so as to mesh with each other, and bearings 6 and 7 made of carbon material are provided in the center holes 4A and 5A of each of the rotors 4 and 5. It is fixedly provided by means of press-fitting, driving, etc. (hereinafter referred to as press-fitting). In one bearing 6, a driving magnet 8 made of ferrite, alnico (trade name), samarium cobalt, etc. is located between the bearing 6 and the center hole 4A and is flush with the outer peripheral surface of the bearing 6. It is buried so that it becomes, and is press-fitted into the center hole 4A together with the bearing 6. 9 and 10 are rotors 4 and 5
The support shafts 9 and 10 are for rotatably supporting the casing body 1A and the lid body 1B.
They are fixed liquid-tightly in between. The support shafts 9, 10
The inner circumferential surfaces of bearings 6 and 7 are rotatably inserted through the outer circumferential surfaces of the rotors 4 and 5 with a slight gap, thereby supporting the rotors 4 and 5. Here, one of the support shafts 9 is configured as a hollow shaft with a bottom, and a hollow chamber 1 is provided in the support shaft 9.
1 is formed. Further, 12 indicates a rotation transmission shaft, one end of the rotation transmission shaft 12 is disposed within the hollow chamber 11, and the other end is provided with a counting section (not shown) such as an integration counter and a pulse transmitter. Further, the rotating shaft 12 is supported by a bearing member 13 midway. Further, within the hollow chamber 11, a driven magnet 14 is fixed to the rotation transmission shaft 12 at a position corresponding to the main driving magnet 8, and each magnet 8, 1
4 constitutes a magnetic joint.

このように構成される容積型流量計において、
ケーシング1の流入口から流出口に向けて被測流
体を流すと、回転子4,5は流体圧力により回転
する。この際、回転子4,5と軸受6,7は支持
軸9,10の外周面を摺動しつつ回転する。一
方、従動マグネツト14は主動マグネツトに吸引
され、回転伝達軸12と共に回転子4,5の回転
に対して位相差なく回転し、計数部に対して回転
を伝達する。
In the positive displacement flowmeter configured in this way,
When the fluid to be measured flows from the inlet to the outlet of the casing 1, the rotors 4 and 5 are rotated by the fluid pressure. At this time, the rotors 4 and 5 and the bearings 6 and 7 rotate while sliding on the outer peripheral surfaces of the support shafts 9 and 10. On the other hand, the driven magnet 14 is attracted to the driving magnet, rotates together with the rotation transmission shaft 12 without a phase difference with respect to the rotation of the rotors 4 and 5, and transmits the rotation to the counter.

しかし、前記従来技術によるものにおいては、
カーボン材からなる軸受6には該軸受6の外周面
と同一面となるようにフエライト等脆弱な材料か
ならる主動マグネツト8が埋設されているため、
回転子4の中心孔4Aに軸受6を圧入するとき、
主動マグネツト8に応力ひずみ、衝撃が加わり、
該主動マグネツト8が破損しやすいという欠点が
ある。このため、作業に長時間要したり、不良を
生じやすい原因となつていた。また、化学液や食
品流体等の腐食性流体を計測する流量計において
は、中心孔4Aと軸受6との間に隙間があると、
当該隙間から腐食性流体が浸入し、主動マグネツ
ト8自体を腐食させてしまうという欠点があつ
た。
However, in the prior art,
A driving magnet 8 made of a fragile material such as ferrite is buried in the bearing 6 made of carbon material so as to be flush with the outer peripheral surface of the bearing 6.
When press-fitting the bearing 6 into the center hole 4A of the rotor 4,
Stress strain and impact are applied to the driving magnet 8,
There is a drawback that the main drive magnet 8 is easily damaged. For this reason, the work takes a long time and is likely to cause defects. In addition, in a flow meter that measures corrosive fluids such as chemical liquids and food fluids, if there is a gap between the center hole 4A and the bearing 6,
There was a drawback that corrosive fluid entered through the gap and corroded the main drive magnet 8 itself.

本考案は、上記従来技術による欠点を改良する
ことを目的とするもので、その特徴とするところ
は一対の回転子のうち一方の回転子の中心孔には
主動マグネツトの全周をモールドしてなる円環状
の合成樹脂体を固着すると共に該合成樹脂体を挟
んで一対の軸受を固着し、また前記2本の支持軸
のうち少くとも一方の支持軸を中空軸により形成
し、該中空軸に前記合成樹脂体および軸受を挿通
して一方の回転子を回転可能に支持し、該中空軸
内に配設された回転伝達軸には前記合成樹脂体内
に埋設された主動マグネツトの回転に従つて回転
する従動マグネツトを設ける構成とすることによ
り、中心孔に対して合成樹脂体と軸受とを別個に
圧入することができ、また主動マグネツトの全周
を合成樹脂でモールドすることにより腐食を防止
しうるようにした容積型流量計を提供するもので
ある。
The present invention aims to improve the drawbacks of the above-mentioned prior art, and its feature is that the entire circumference of the driving magnet is molded into the center hole of one of the pair of rotors. A ring-shaped synthetic resin body is fixed thereto, and a pair of bearings are fixed on both sides of the synthetic resin body, and at least one of the two support shafts is formed by a hollow shaft, and the hollow shaft One of the rotors is rotatably supported by inserting the synthetic resin body and a bearing into the hollow shaft, and a rotation transmission shaft disposed in the hollow shaft has a rotation transmitting shaft that follows the rotation of a driving magnet embedded in the synthetic resin body. By providing a driven magnet that rotates with the main drive magnet, the synthetic resin body and bearing can be press-fitted into the center hole separately, and corrosion is prevented by molding the entire circumference of the main drive magnet with synthetic resin. The present invention provides a positive displacement flowmeter that can perform

以下、本考案について第2図乃至第4図に示す
実施例と共に説明するに、第1図に示す従来技術
と同一構成要素には同一符号を付し、その説明を
省略する。
Hereinafter, the present invention will be described together with the embodiments shown in FIGS. 2 to 4. Constituent elements that are the same as those of the prior art shown in FIG.

21は回転子4の中心孔4Aに圧入手段で固着
される円環状の合成樹脂体で、該合成樹脂体21
の外周側には全周にわたつて溝21A,21A,
…が形成され、その内周側は支持軸9の外径より
も若干大径となつた支持軸挿通穴21Bとなつて
いる。ここで、合成樹脂体21は例えばフエノー
ル系樹脂、ポリプロピレン系樹脂、塩化ビニール
系樹脂等が使用される。22は前記合成樹脂体2
1内に全周が覆われるようにモールドされる主動
マグネツトで、該マグネツト22は合成樹脂体2
1を樹脂成型するとき同時にモールドされる。2
3,24は回転子4の中心孔4Aに圧入手段で固
着される円環状の軸受で、該各軸受23,24は
前記合成樹脂体21を挟んでその両側に固着さ
れ、しかも該各軸受23,24の支持軸挿通孔2
3A,23Bには支持軸9が挿通され、該支持軸
9に対して回転子4を回転可能に支持する。
Reference numeral 21 denotes an annular synthetic resin body fixed to the center hole 4A of the rotor 4 by press-fitting means, and the synthetic resin body 21
Grooves 21A, 21A,
... is formed, and the inner peripheral side thereof forms a support shaft insertion hole 21B having a slightly larger diameter than the outer diameter of the support shaft 9. Here, the synthetic resin body 21 is made of, for example, phenol resin, polypropylene resin, vinyl chloride resin, or the like. 22 is the synthetic resin body 2
The magnet 22 is a main drive magnet that is molded so that its entire circumference is covered within the synthetic resin body 2.
1 is molded at the same time as resin molding. 2
Reference numerals 3 and 24 denote annular bearings fixed in the center hole 4A of the rotor 4 by press-fitting means. , 24 support shaft insertion hole 2
A support shaft 9 is inserted through 3A and 23B, and the rotor 4 is rotatably supported with respect to the support shaft 9.

本考案はこのように構成されるが、中心孔4A
に対して軸受23、合成樹脂体21、軸受24の
順序で圧入してこれらを固着すればよい。逆に、
最初に合成樹脂体21を圧入し、次にその両側か
ら軸受23,24を圧入してもよい。この際、合
成樹脂体21には主動マグネツト22がモールド
されているが、該マグネツト22は全周が覆わ
れ、かつ軸受23,24とは別個に圧入作業を行
なうことができるから、軽い外力で圧入でき、従
つて圧入時の衝撃、応力ひずみ等による破損を防
止できる。特に、合成樹脂体21の外周には全周
にわたつて溝21Aが形成されているから、圧入
作業時に各溝21間の突部が該各溝21に向けて
変形し、圧入作業を軽い外力で行なうことがで
き、主動マグネツト22の破損を確実に防止しう
ると共に、前記突部が押し潰された状態で中心孔
4Aと密着して合成樹脂体21のガタ発生も防止
しうる。さらに、主動マグネツト22は腐食性流
体に耐えうる樹脂で全周が覆われているから、腐
食の恐れもない。
Although the present invention is configured as described above, the center hole 4A
The bearing 23, the synthetic resin body 21, and the bearing 24 may be press-fitted in this order and fixed. vice versa,
The synthetic resin body 21 may be press-fitted first, and then the bearings 23 and 24 may be press-fitted from both sides thereof. At this time, a driving magnet 22 is molded into the synthetic resin body 21, and since the entire circumference of the magnet 22 is covered and can be press-fitted separately from the bearings 23 and 24, a light external force is required. It can be press-fitted, and therefore damage caused by impact, stress strain, etc. during press-fitting can be prevented. In particular, since grooves 21A are formed all around the outer periphery of the synthetic resin body 21, the protrusions between the grooves 21 deform toward the respective grooves 21 during the press-fitting operation, and the press-fitting operation can be carried out with a light external force. This can reliably prevent damage to the driving magnet 22, and also prevent the synthetic resin body 21 from rattling as the protrusion is in close contact with the center hole 4A in the crushed state. Furthermore, since the main drive magnet 22 is entirely covered with resin that can withstand corrosive fluids, there is no fear of corrosion.

なお、前述の実施例においては回転子4,5と
して楕円歯車型回転子を用いるものとして述べた
が、ルーツ型回転子を用いてもよいものである。
また、支持軸9,10のうち一方の支持軸9のみ
を有底状の中空軸とするものとして述べたが、蓋
体1B側から外部に開口した円筒体としてもよ
く、この場合には中空室11内が外気に連通する
から、冷却効果を高めることができる。さらに、
他方の支持軸10も中空軸としたり、蓋体1B側
から外部に開口した円筒体としてもよいことは勿
論である。
In the above embodiment, elliptical gear type rotors are used as the rotors 4 and 5, but roots type rotors may also be used.
Further, although it has been described that only one of the support shafts 9 and 10 is a bottomed hollow shaft, it may be a cylindrical body that opens to the outside from the lid body 1B side. Since the inside of the chamber 11 communicates with the outside air, the cooling effect can be enhanced. moreover,
Of course, the other support shaft 10 may also be a hollow shaft or may be a cylindrical body opened to the outside from the lid 1B side.

本考案に係る容積型流量計は以上詳細に述べた
如く、主動マグネツトを合成樹脂体内にモールド
する構成とし、回転子の中心孔に対し該合成樹脂
体を挟んでその両側に軸受を設けるようにしたか
ら、下記各項の効果を奏する。
As described in detail above, the positive displacement flowmeter according to the present invention has a structure in which the active magnet is molded in a synthetic resin body, and bearings are provided on both sides of the synthetic resin body with respect to the center hole of the rotor. Therefore, the following effects can be achieved.

主動マグネツトは合成樹脂体内に全周が覆わ
れ、しかも中心孔に対して合成樹脂体を軸受と
は別個に圧入できるから、軽い外力で圧入作業
を行なうことができ、主動マグネツトの破損を
防止しうる。
The main drive magnet is covered all around in a synthetic resin body, and the synthetic resin body can be press-fitted into the center hole separately from the bearing, so press-fitting can be done with a light external force, preventing damage to the main drive magnet. sell.

主動マグネツトは全周をモールドしているか
ら腐食の恐れがない。
The active magnet is molded all around, so there is no risk of corrosion.

前記項の結果、生産性が向上すると共に不
良率を低下させ、歩留りを高めることができ
る。
As a result of the above, productivity can be improved, the defect rate can be reduced, and the yield can be increased.

合成樹脂体の外周面に溝を形成することによ
り、圧入作業時に各溝間の突部が変形しやす
く、より軽い力で圧入でき、しかも突部が押し
潰された状態で中心孔と密着し、主動マグネツ
トのガタ発生を確実に防止しうる。
By forming grooves on the outer circumferential surface of the synthetic resin body, the protrusions between each groove are easily deformed during press-fitting, allowing for press-fitting with less force, and the protrusions are crushed and tightly contact the center hole. , it is possible to reliably prevent the occurrence of backlash in the active magnet.

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

第1図は従来技術による容積型流量計を示す縦
断面図、第2図乃至第4図は本考案に係る容積型
流量計を示し、第2図は一方の回転子の縦断面
図、第3図は第2図の−矢示方向断面図、第
4図は合成樹脂体と軸受の斜視図である。 1……ケーシング、3……計量室、4,5……
回転子、4A,5A……中心孔、9,10……支
持軸、12……回転伝達軸、14……従動マグネ
ツト、21……合成樹脂体、21A……溝、22
……主動マグネツト、23,24……軸受。
FIG. 1 is a longitudinal sectional view showing a positive displacement flowmeter according to the prior art, FIGS. 2 to 4 show a positive displacement flowmeter according to the present invention, and FIG. 3 is a sectional view taken in the direction of the - arrow in FIG. 2, and FIG. 4 is a perspective view of the synthetic resin body and the bearing. 1... Casing, 3... Measuring chamber, 4, 5...
Rotor, 4A, 5A...center hole, 9, 10...support shaft, 12...rotation transmission shaft, 14...driven magnet, 21...synthetic resin body, 21A...groove, 22
...Driver magnet, 23, 24...Bearing.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 流入口と流出口との間に計量室を有するケーシ
ングと、該計量室内に設けられ被測流体の流量に
比例して回転する一対の回転子と、該各回転子の
中心孔に挿通され該各回転子を回転可能に支持す
べく前記ケーシングに設けられた2本の支持軸と
からなる容積型流量計において、前記一対の回転
子のうち一方の回転子の中心孔には主動マグネツ
トの全周をモールドしてなる円環状の合成樹脂体
を固着すると共に該合成樹脂体を挟んで一対の軸
受を固着し、また前記2本の支持軸のうち少くと
も一方の支持軸を中空軸により形成し、該中空軸
に前記合成樹脂体および軸受を挿通して一方の回
転子を回転可能に支持し、該中空軸内に配設され
た回転伝達軸には前記合成樹脂体内に埋設された
主動マグネツトの回転に従つて回転する従動マグ
ネツトを設けてなる容積型流量計。
A casing having a metering chamber between an inlet and an outlet; a pair of rotors provided in the metering chamber and rotating in proportion to the flow rate of the fluid to be measured; In a positive displacement flowmeter consisting of two support shafts provided in the casing to rotatably support each rotor, the center hole of one of the pair of rotors has the entire drive magnet. A ring-shaped synthetic resin body having a molded circumference is fixed, and a pair of bearings are fixed across the synthetic resin body, and at least one of the two support shafts is formed by a hollow shaft. The synthetic resin body and the bearing are inserted into the hollow shaft to rotatably support one rotor, and the rotation transmission shaft disposed within the hollow shaft has a main drive embedded in the synthetic resin body. A positive displacement flowmeter equipped with a driven magnet that rotates as the magnet rotates.
JP9140582U 1982-06-18 1982-06-18 Positive displacement flowmeter Granted JPS58193221U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9140582U JPS58193221U (en) 1982-06-18 1982-06-18 Positive displacement flowmeter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9140582U JPS58193221U (en) 1982-06-18 1982-06-18 Positive displacement flowmeter

Publications (2)

Publication Number Publication Date
JPS58193221U JPS58193221U (en) 1983-12-22
JPS634974Y2 true JPS634974Y2 (en) 1988-02-10

Family

ID=30099787

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9140582U Granted JPS58193221U (en) 1982-06-18 1982-06-18 Positive displacement flowmeter

Country Status (1)

Country Link
JP (1) JPS58193221U (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004027386A1 (en) * 2004-06-04 2006-01-05 Vse Volumentechnik Gmbh Flow rate sensors

Also Published As

Publication number Publication date
JPS58193221U (en) 1983-12-22

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