JPH0448500Y2 - - Google Patents
Info
- Publication number
- JPH0448500Y2 JPH0448500Y2 JP1984066454U JP6645484U JPH0448500Y2 JP H0448500 Y2 JPH0448500 Y2 JP H0448500Y2 JP 1984066454 U JP1984066454 U JP 1984066454U JP 6645484 U JP6645484 U JP 6645484U JP H0448500 Y2 JPH0448500 Y2 JP H0448500Y2
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- rotor
- flowmeter
- oval
- spiral groove
- 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
Links
- 239000007788 liquid Substances 0.000 claims description 12
- 238000005461 lubrication Methods 0.000 description 4
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 3
- 238000009835 boiling Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 238000013021 overheating Methods 0.000 description 3
- 239000003575 carbonaceous material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Landscapes
- Measuring Volume Flow (AREA)
- Details Of Flowmeters (AREA)
Description
【考案の詳細な説明】 〔技術分野〕 本考案はオーバル流量計に関する。[Detailed explanation of the idea] 〔Technical field〕 The present invention relates to an oval flowmeter.
オーバル流量計は相互にかみ合つた２つの楕円
歯車型の回転子の長軸端をケースの内壁に接しな
がら液体流通の差圧により回転させ、回転子とケ
ース内壁とにはさまれて出来る一定の空間に相当
する体積の液体を回転子の回転によつて送り出す
構造の容積式流量計であり、比較的簡単な構造で
ありながら精度が良く液体の温度、圧力、条件や
脈動に対して安定で圧損も小さいため工業的に広
く用いられている。
An oval flowmeter consists of two intermeshed elliptical gear-shaped rotors that are rotated by the differential pressure of liquid flow while touching the inner wall of the case. This positive displacement flowmeter has a structure that sends out a volume of liquid equivalent to the space of It is widely used industrially because of its low pressure loss.
このオーバル流量計において、回転子軸受部分
はケース内に於て流通する液体に回転子同様接し
ており、その潤滑及び摩擦熱の冷却は流通液自体
による自己潤滑及び自己冷却によつている。 In this oval flowmeter, the rotor bearing portion is in contact with the liquid flowing in the case, as is the rotor, and its lubrication and cooling of frictional heat are achieved by self-lubrication and self-cooling by the flowing liquid itself.
しかしながら、軸受と軸のクリアランスはオー
バル流量計の回転精度を左右する最も重要な因子
の一つでありその値は通常50〜100μm程度に調整
されている。かくの如き精密な軸受部において、
取扱う流通液体の粘度が1cp以下の低粘性である
場合（たとえば塩化ビニルモノマー粘度は約
0.2cp（20℃）である）、潤滑不充分となり易くこ
のため軸受部が高温となるうえに沸点が室温以下
の低沸液である場合軸受部の摩擦熱により容易に
気化し、軸受部は無潤滑状態となり、更に過熱し
軸の熱膨張により軸受部のランニングクリアラン
スはなくなり回転不能となるトラブルが屡々発生
しており、特に３吋以上の大口径のオーバル流量
計においてはこの傾向が大であつた。 However, the clearance between the bearing and the shaft is one of the most important factors that affects the rotation accuracy of an oval flowmeter, and its value is usually adjusted to about 50 to 100 μm. In such a precision bearing part,
When the viscosity of the circulating liquid handled is low, 1 cp or less (for example, the viscosity of vinyl chloride monomer is approx.
0.2 cp (at 20°C)), lubrication is likely to be insufficient.As a result, the bearing part becomes hot, and if it is a low-boiling liquid with a boiling point below room temperature, it will easily vaporize due to the frictional heat of the bearing part, and the bearing part will become hot. Troubles often occur where the bearing becomes unlubricated, overheats, and due to thermal expansion of the shaft, the bearing loses its running clearance and becomes unable to rotate.This tendency is particularly severe in oval flowmeters with large diameters of 3 inches or more. It was hot.
本考案者は、この様な問題点に対して鋭意検討
を重ねた結果、軸受け部のクリアランスを従来通
りに保ちながらも流通液体を軸受け部に充分導入
出来る方法により、問題を解決し、本考案を完成
した。
The inventor of the present invention has conducted intensive studies on these problems, and has solved the problem with a method that allows sufficient flow of fluid to be introduced into the bearing while maintaining the clearance of the bearing as before, and has developed the present invention. completed.
即ち、本考案は回転子軸受けの内面に螺旋溝を
設けたことを特徴とするオーバル流量計である。
本考案によれば、オーバル流量計で取扱う液体す
べてについて軸受け部における潤滑性を高めるこ
とに有効であるが、特に先に記した低粘性、低沸
点の液体に対して最も簡単で効果的な構造であり
軸受け部に流通液体を充分導入することが出来、
従来の過熱によるトラブルを完全に防止すること
が出来る。 That is, the present invention is an oval flowmeter characterized in that a spiral groove is provided on the inner surface of the rotor bearing.
According to the present invention, it is effective in increasing the lubricity of the bearing part for all liquids handled by the oval flowmeter, but it is the simplest and most effective structure especially for the low viscosity and low boiling point liquids mentioned above. This allows sufficient flow of liquid to be introduced into the bearing part.
The conventional troubles caused by overheating can be completely prevented.
以下に本考案を図によつて詳細に説明する。 The present invention will be explained in detail below using figures.
第１図に示す如くブツシユ形の軸受け部５の内
面に螺旋溝７が設けられている。この螺旋溝の断
面形状は半円、方形、Ｖ形、台形、等様々な形状
が考えられるが螺旋のピツチと共に取扱液体の物
性及び軸受の材質及び口径を考慮して工作が容易
で有効な形状、ピツチを実験的に定める。 As shown in FIG. 1, a helical groove 7 is provided on the inner surface of the bush-shaped bearing portion 5. The cross-sectional shape of this spiral groove can be various shapes such as semicircle, square, V-shape, trapezoid, etc., but it is easy to work and effective shape considering the pitch of the spiral, the physical properties of the liquid to be handled, and the material and diameter of the bearing. , the pitch is determined experimentally.
第２図に於て、螺旋溝７を設けた軸受５は回転
子６の中心穴に両側面より嵌入し更にスラストリ
ング４により押え、これに軸３を通す。この構造
において、流通液はスラストリング４と軸３の間
から軸受部に到り回転子６の回転に伴つて螺旋溝
７により軸受部に容易に流通、浸潤し潤滑及び冷
却が充分行われる。 In FIG. 2, the bearing 5 provided with the spiral groove 7 is fitted into the center hole of the rotor 6 from both sides, and is further held down by the thrust ring 4, through which the shaft 3 is passed. In this structure, the circulating fluid reaches the bearing section from between the thrust ring 4 and the shaft 3, and as the rotor 6 rotates, the fluid flows through and infiltrates the bearing section easily through the spiral groove 7, thereby providing sufficient lubrication and cooling.
次に実施例により更に説明する。 Next, it will be further explained by examples.
実施例
塩ビモノマー製造工程において、液化塩ビモノ
マーの移液ラインにオーバル流量計を設置し計量
を行つている。Example In the process of manufacturing vinyl chloride monomer, an oval flowmeter is installed in the liquid transfer line for liquefied vinyl chloride monomer to perform measurement.
このオーバル流量計は配管径に合せて口径６
吋、最大流量レンジ270m3／Hrのものを使用して
いるが60m3／Hrの連続使用に於て２日間程度で
軸受部の過熱トラブルが頻発するため同じ流量計
を常に並列設置して使用していた。 This oval flowmeter has a diameter of 6 to match the pipe diameter.
2. I am using a model with a maximum flow rate of 270m 3 /Hr, but when using it continuously at 60m 3 /Hr, overheating problems occur frequently in the bearing part after about 2 days, so I always use the same flowmeter installed in parallel. Was.
尚、軸は直径45mmφのステンレス材で軸受はカ
ーボン材を使用し、クリアランスは90μmである。 The shaft is made of stainless steel with a diameter of 45 mm, the bearing is made of carbon material, and the clearance is 90 μm.
このカーボン材の軸受にピツチ10mmのＶ形螺旋
溝を設け使用したところ180m3／Hrと従来の３倍
の流量による３ケ月間の連続使用において軸受部
過熱によるトラブルは皆無で極めて順調で精度の
良い計量が行われた。 When using this carbon material bearing with a V-shaped spiral groove with a pitch of 10 mm, it was used continuously for 3 months at a flow rate of 180 m 3 /Hr, three times the conventional rate, and there were no troubles due to overheating of the bearing, and the operation was very smooth and accurate. A good weigh-in was made.
第１図は、本発明による軸受に螺旋溝を設けた
１例を示す断面図である。第２図は、第１図の軸
受を嵌入した回転子の１例を示す断面図である。
第３図は、オーバル流量計の回転子関係の主要部
の構造の１例を示す分解斜視図である。（尚、計
数部及び計数部への回転伝達機構は省略し、図示
していない。）図において
１……外筒、２……内筒、３……軸、４……ス
ラストリング、５……軸受、６……回転子、７…
…螺旋溝。
FIG. 1 is a sectional view showing an example of a bearing according to the present invention provided with a spiral groove. FIG. 2 is a sectional view showing an example of a rotor in which the bearing shown in FIG. 1 is fitted.
FIG. 3 is an exploded perspective view showing an example of the structure of the main parts related to the rotor of the oval flowmeter. (Note that the counter and the rotation transmission mechanism to the counter are omitted and not shown.) In the figure: 1...outer cylinder, 2...inner cylinder, 3...shaft, 4...thrust ring, 5... ...Bearing, 6...Rotor, 7...
...Spiral groove.
Claims (1)
の被計量液の一部を呼び込み流通せしめる螺旋溝
を設けたことを特徴とするオーバル流量計。 An oval flowmeter characterized by having a spiral groove on the inner surface of a bearing that rotates together with the rotor to draw in and circulate a portion of a low-viscosity liquid to be measured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6645484U JPS60179925U (en) | 1984-05-09 | 1984-05-09 | oval flow meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6645484U JPS60179925U (en) | 1984-05-09 | 1984-05-09 | oval flow meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60179925U JPS60179925U (en) | 1985-11-29 |
| JPH0448500Y2 true JPH0448500Y2 (en) | 1992-11-16 |
Family
ID=30599369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6645484U Granted JPS60179925U (en) | 1984-05-09 | 1984-05-09 | oval flow meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60179925U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5644488A (en) * | 1979-09-20 | 1981-04-23 | Tokico Ltd | Two-shaft positive displacement rotary machine |
-
1984
- 1984-05-09 JP JP6645484U patent/JPS60179925U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5644488A (en) * | 1979-09-20 | 1981-04-23 | Tokico Ltd | Two-shaft positive displacement rotary machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60179925U (en) | 1985-11-29 |
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