JPS58127124A - Positive-displacement rotary fluid apparatus - Google Patents
Positive-displacement rotary fluid apparatusInfo
- Publication number
- JPS58127124A JPS58127124A JP900482A JP900482A JPS58127124A JP S58127124 A JPS58127124 A JP S58127124A JP 900482 A JP900482 A JP 900482A JP 900482 A JP900482 A JP 900482A JP S58127124 A JPS58127124 A JP S58127124A
- Authority
- JP
- Japan
- Prior art keywords
- teeth
- rotors
- tooth
- pair
- casing
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F3/00—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow
- G01F3/02—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with measuring chambers which expand or contract during measurement
- G01F3/04—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with measuring chambers which expand or contract during measurement having rigid movable walls
- G01F3/06—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with measuring chambers which expand or contract during measurement having rigid movable walls comprising members rotating in a fluid-tight or substantially fluid-tight manner in a housing
- G01F3/10—Geared or lobed impeller meters
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は例えば流量計、計測ポンプあるいはポンプ等に
使用する容積式回転流体装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a positive displacement rotary fluid device used, for example, in a flow meter, a measuring pump, or a pump.
特に、断面が連続的に接触する歯形形状であり、かつね
じれを有する容積式回転流体装置の改良に関するもので
ある。In particular, the present invention relates to an improvement in a positive displacement rotary fluid device having a tooth-shaped cross section that continuously contacts each other and having a twist.
周知の如り、サイン歯形、サイコロイド歯形、トロコイ
ド歯形等で形成されたものは、歯形の金歯面が連続的に
全面噛み合い作用をする歯形であり、一方の歯の頂部と
他方の歯の溝部の噛み合いの際に、この部分に干渉の起
こらないように設計されている歯形である。理論的に干
渉の起こうイにいように段目されたこの種の歯車におい
では、理論］具で理論通りの加工がなされ、理輪軸間距
−（で支承駆動されるとずれば、とじ込みおよび空洞現
象は発生しない。しかしながら現実の問題としては、ｈ
ロエ丁具による歯形の誤差、加工誤差、多角形誤差ある
いは軸、軸受の公差等々により理論値の軸間距離を取る
ことは不可能であり、また実際には摩耗や損耗によって
誤差が生ずる。したが−）で連続的に接触する歯車とさ
れている歯形でも実際上は軸間距離が理論値より大きく
なるため、歯の頂部と歯の溝部との間に隙間ができ、そ
のために歯形形状が歯頂部と両名底部とが密合状態とな
るものであっても、異なった半径の円弧を採用していた
ものであっても、実際上はどじ込み現象が生ずる。As is well known, the sine tooth profile, psychoroid tooth profile, trochoid tooth profile, etc. are tooth profiles in which the gold tooth surfaces of the tooth profile continuously engage with each other on the entire surface, and the top of one tooth and the groove of the other tooth. The tooth profile is designed so that there will be no interference in this part during meshing. In this type of gear, which is arranged in such a way that theoretically interference would occur, it is possible to machine the gear according to theory using the theoretical tool, and if it is supported and driven with the gear wheel center distance, it will cause lock-in and Cavity phenomenon does not occur.However, as a real problem, h
It is impossible to obtain the theoretical value of the distance between the shafts due to errors in the tooth profile caused by the Loe knife, processing errors, polygon errors, tolerances of the shafts and bearings, etc., and in reality errors occur due to wear and tear. However, even with a tooth profile that is considered to be a gear in continuous contact (-), the distance between the axes is actually larger than the theoretical value, so a gap is created between the top of the tooth and the groove of the tooth, which causes the tooth profile to change. Even if the top and bottom of the tooth are in a tight state, or if arcs with different radii are used, the phenomenon of stagnation actually occurs.
第１図はこのとじ込み現象が生ずる理由を図解したもの
で、一対のロータ１，２が勾いに噛み合いながら回転し
ており、その一方のＩＩ−タ１の歯の頂部１ａが他方の
ロータ２の溝部２ａどの間に瞬間的なとじ込みＡが生ず
る。FIG. 1 illustrates the reason why this binding phenomenon occurs. A pair of rotors 1 and 2 are rotating while meshing with each other at an angle, and the tops 1a of the teeth of one II-tor 1 are on the other rotor 2. An instantaneous entrapment A occurs between the groove portions 2a.
一般的に連続的に接触する歯車では、どじ込み部の容積
は一定不変で、しかもそのとじ込み状態が瞬間的に現わ
れるだけなので、とじ込み現象が発生したどしても、そ
れによる機器等ｌ＼の障害は全く生じないものとされて
きた。しかしながら、流量削や計測ポンプのような流体
機器は極小さなとじ込みも許されないものであり、また
蒸気圧の高い液体用のポンプ等の場合では性能上キトピ
テーションが発生する等の問題が生じる。In general, with gears that are in continuous contact, the volume of the entrapment part remains constant, and the entrapment state only appears momentarily, so even if a entrapment phenomenon occurs, the damage caused by the entrapment of equipment, etc. It was assumed that no obstacles would arise. However, fluid devices such as flow reduction and measuring pumps cannot tolerate even the smallest amount of confinement, and in the case of pumps for liquids with high vapor pressure, problems such as kitopitation occur in terms of performance.
したがって本発明の目的はどじ込みが生じない連続的に
接触する歯形を使用した容積式回転流体装置を提供する
にある。SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a positive displacement rotary fluid device using continuous contact tooth profiles that do not cause stagnation.
本発明によれば、連続的に接触する歯を有し、かつねじ
れを有する一対のロータを実質的に平行に設り、それぞ
れの歯の頂部においてその歯のねじれ番こ冶って小溝を
形成するようにし、以てこの小満が歯頂部と歯溝底部と
の接触部分では逃し溝どして瞬間的などじ込みを防止し
、かつケーシングと歯頂部との接触部分においてはラビ
リンス効果をもたけることにＪ：って漏洩量を少くする
にうにしである。According to the present invention, a pair of rotors having teeth in continuous contact and having a twist are provided substantially parallel to each other, and a small groove is formed by twisting the teeth at the top of each tooth. By doing so, this small hole forms a relief groove at the contact area between the tooth top and the tooth groove bottom to prevent instantaneous entrapment, and also creates a labyrinth effect at the contact area between the casing and the tooth top. In particular, J: is a sea urchin that reduces the amount of leakage.
以１・本発明の実施例を第２図ないし第４図を参照して
さらに訂細に説明する。Embodiments of the present invention will now be described in more detail with reference to FIGS. 2 to 4.
第２図および第３図に示したものは本発明をロータ型の
流量ｔ１に適用した例である。同一の形状で同一の歯数
の連続的に接触づる歯１ｏを有した一対のロータ１．２
はケーシング５内に形成されたローター室１４内に相互
に噛み合って実質的に平行に設（）られている。ケーシ
ング５の側面に（ま流入口３と流出［−１４が形成され
ている。ケーシング５の開放両端部は前後の端板６．７
ににって密閉され、Ｓｆｌ記各［１−夕１．２の輔８．
１６の一方は端板７に形成された軸受穴１１．１２内に
回転自在に支承されている。そして【」−ター１．２の
軸８．１Ｇの他方には、タイミングギヤ７１７、′１８
を段【）、ローターがスムーズに回転ηるようにしいて
る。また一方のロータ１の軸８の一方は出力軸として端
板６を越えて突出し、流量表示泪９の表示釦を駆動する
ため回転力を出力するようになっている。各Ｉ］−夕１
．２の連続的に接触づる歯１０は同一のねじれ角を与え
られており、その頂部にはそのねじれに沿って小ｒＩ１
１１３が形成されている。What is shown in FIGS. 2 and 3 is an example in which the present invention is applied to a rotor type flow rate t1. A pair of rotors 1.2 having continuously contacting teeth 1o of the same shape and the same number of teeth.
are disposed substantially parallel to each other in a rotor chamber 14 formed in the casing 5 in mesh with each other. An inlet 3 and an outlet [-14] are formed on the side surface of the casing 5. Both open ends of the casing 5 are connected to front and rear end plates 6.7.
It was sealed and sealed, and each Sfl. 1.
16 is rotatably supported in a bearing bore 11.12 formed in the end plate 7. And on the other side of the shaft 8.1G of the [''-tar 1.2, there is a timing gear 717, '18.
The stage [) ensures that the rotor rotates smoothly. Further, one of the shafts 8 of one rotor 1 projects beyond the end plate 6 as an output shaft, and outputs rotational force to drive the display button of the flow rate display button 9. Each I] - Evening 1
．． The two continuously contacting teeth 10 are given the same helix angle and have a small rI1 at the top along the helix.
113 is formed.
次に本発明の実施例の作用および効果を説明１−る。Next, the functions and effects of the embodiments of the present invention will be explained.
流入口３から流量を測定サベき液体が流入されると、子
の液体によって噛み合った一対の口〜り１．２が回転さ
せられる。この一対の【］−タタ、２はケーシング５０
ローウー室１４内において軸受穴１１．１２とタイミン
グギヤ１７．１８により距離法めされ、かつ回転自在に
支承されており、この回転力は一方のロータ１の軸８を
介して流量表示計９に伝達される。この一対のロータ１
．２はローター室１４内にａ３いて余分な間隔を設けず
に回転自在に支承されているので、出ツノ軸８の回転数
は流入口３から流入される液体の間に比例する。このよ
うにしてロータ１．２を回転さけた液体は流出口４から
流量ｎｌ外に流出する。When the flow rate of the liquid is inflowed from the inlet 3, the pair of meshed openings 1.2 are rotated by the secondary liquid. This pair of []-tata, 2 is casing 50
It is rotatably supported in a rotor chamber 14 by a bearing hole 11.12 and a timing gear 17.18, and this rotational force is transmitted to a flow rate indicator 9 via a shaft 8 of one rotor 1. communicated. This pair of rotors 1
．． 2 is rotatably supported within the rotor chamber 14 with no extra spacing, so the number of revolutions of the output horn shaft 8 is proportional to the amount of liquid flowing in from the inlet 3. The liquid that has thus avoided rotation of the rotor 1.2 flows out through the outlet 4 to the outside of the flow rate nl.
今、噛み合った連続的に接触する歯形１０のね５− じれの先行部分でどじ込み現象が発生したと仮定する。The teeth 5- of the tooth profile 10 that are now engaged and in continuous contact It is assumed that the stagnation phenomenon occurs in the preceding part of the sag.
この場合、同一の歯１０のねじれの後行部分は対になる
べき［１−夕の歯溝部とまだ噛み合い接触をしていない
状態にある。そして、その歯形の頂部には小溝１３が形
成されているので、歯形のねじれの先行部分で発生しよ
うとするとじ込み現象は小溝１３を通ってねじれの後行
部分に逃げてしまう。したがってとじ込み現象は発生し
ない。In this case, the trailing portion of the twist of the same tooth 10 is not yet in meshing contact with the groove portion of the second tooth to be paired. Since the small groove 13 is formed at the top of the tooth profile, the binding phenomenon that is about to occur in the leading part of the tooth profile torsion escapes through the small groove 13 to the trailing part of the twist. Therefore, no binding phenomenon occurs.
さら（こ、ケーシングのローター室内面と歯形の頂部ど
の接触部でのラビリンス効果について、第４図を参照し
て説明する。この接触面の右側近傍の圧力をＰｌどし、
左側近傍の圧力をＰ３とし、Ｐｉ ＞Ｐ３とする。この
場合、小溝１３内の圧力１〕２はＰｌ ＞、 Ｐ２ ＞
１〕３となり、圧力Ｐ１と圧力Ｐ３との間に中間圧力
Ｐ２の緩衝帯が形成されることになる。このようなラビ
リンス効果によ−）て、小満１３が形成されない場合の
圧力差Ｐ１−Ｐ３よりも、小嵩１３を形成した場合の段
階的な圧力差Ｐ１−Ｐ２あるいはＰ：）−Ｐ３の方が小
さいので、圧力差による液体の漏洩が少くなる。Furthermore, the labyrinth effect at the contact point between the rotor chamber surface of the casing and the top of the tooth profile will be explained with reference to FIG. 4.The pressure near the right side of this contact surface is set to Pl,
Let the pressure near the left side be P3, and Pi > P3. In this case, the pressure 1]2 in the small groove 13 is Pl>, P2>
1]3, and a buffer zone of intermediate pressure P2 is formed between pressure P1 and pressure P3. Due to such a labyrinth effect, the gradual pressure difference P1-P2 or P:)-P3 when the small volume 13 is formed is higher than the pressure difference P1-P3 when the small volume 13 is not formed. is small, so there is less liquid leakage due to pressure difference.
−〇−−〇−
Claims (1)
ータを実質的に平行に設け、それぞれの歯を頂部におい
てその頂部に沿う小溝を形成したことを特徴とする容積
式回転流体装置。1. A positive displacement rotary fluid device, characterized in that a pair of rotors having teeth in continuous contact and having a twist are provided substantially parallel to each other, and each tooth has a small groove formed at the top thereof along the top thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP900482A JPS58127124A (en) | 1982-01-25 | 1982-01-25 | Positive-displacement rotary fluid apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP900482A JPS58127124A (en) | 1982-01-25 | 1982-01-25 | Positive-displacement rotary fluid apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58127124A true JPS58127124A (en) | 1983-07-28 |
| JPS636808B2 JPS636808B2 (en) | 1988-02-12 |
Family
ID=11708510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP900482A Granted JPS58127124A (en) | 1982-01-25 | 1982-01-25 | Positive-displacement rotary fluid apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58127124A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03109341U (en) * | 1990-02-23 | 1991-11-11 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4427586Y1 (en) * | 1965-08-17 | 1969-11-17 |
-
1982
- 1982-01-25 JP JP900482A patent/JPS58127124A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4427586Y1 (en) * | 1965-08-17 | 1969-11-17 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS636808B2 (en) | 1988-02-12 |
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