JPH0421036Y2 - - Google Patents
Info
- Publication number
- JPH0421036Y2 JPH0421036Y2 JP16068886U JP16068886U JPH0421036Y2 JP H0421036 Y2 JPH0421036 Y2 JP H0421036Y2 JP 16068886 U JP16068886 U JP 16068886U JP 16068886 U JP16068886 U JP 16068886U JP H0421036 Y2 JPH0421036 Y2 JP H0421036Y2
- Authority
- JP
- Japan
- Prior art keywords
- axis
- impeller
- casing
- curve
- points
- 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 17
- 230000001617 migratory effect Effects 0.000 claims description 3
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は液封式ポンプに関し、さらに詳しくは
気体を吸引、圧縮する１回転２作動型の液封式真
空ポンプ、及び圧縮ポンプのケーシングの形状に
関するものである。[Detailed description of the invention] (Field of industrial application) The present invention relates to a liquid ring pump, and more specifically, a liquid ring vacuum pump of the one-turn, two-action type that sucks and compresses gas, and a casing of the compression pump. It's about shape.
（従来技術）
回転軸に取り付けられた羽根車がまゆ型のケー
シング内に組み込まれ、ケーシング内に水又は液
を封入して気体を吸入、圧縮する１回転２作動型
の液封式ポンプは定速度で回転する羽根車を１個
もつだけの単純な構造で運転、保守が容易なため
広く使用されている。(Prior art) A one-rotation, two-action type liquid ring pump has an impeller attached to a rotating shaft built into a cocoon-shaped casing, and seals water or liquid in the casing to suck in and compress gas. It is widely used because it has a simple structure with only one impeller that rotates at high speed and is easy to operate and maintain.
第３〜５図は従来の１回転２作動型液封式ポン
プのケーシングの形状を説明するための図面で、
１はケーシング、２は羽根車、３はエアーパツセ
イジ（ポートコーン）、４はサイドカバー、５は
吸入口、６は吐出口を示し、７は図示しない電動
機と連結する羽根車の回転軸である。 Figures 3 to 5 are drawings for explaining the shape of the casing of a conventional one-rotation, two-acting liquid ring pump.
1 is a casing, 2 is an impeller, 3 is an air passage (port cone), 4 is a side cover, 5 is an intake port, 6 is a discharge port, and 7 is a rotating shaft of the impeller connected to an electric motor (not shown). be.
このような従来の１回転２作動型液封式ポンプ
のケーシングの内壁８ａを形成する曲線は、吐出
域を形成する、羽根車の回転軸の軸心Ｏをとおる
垂直軸（Ｘ軸）上の点a1，a2を基点とする曲線a1
b1，a2b2と、渡り域を形成する曲線b1c1，b2c2と、
吸入域を形成する曲線c1a2，c2，a1とにより形成
される。 The curve forming the inner wall 8a of the casing of such a conventional one-rotation, two-action type liquid ring pump is on the vertical axis (X-axis) passing through the axis O of the rotation axis of the impeller, which forms the discharge area. Curve a 1 with points a 1 and a 2 as base points
b 1 , a 2 b 2 and the curves b 1 c 1 , b 2 c 2 forming the migratory area,
It is formed by the curves c 1 a 2 , c 2 , and a 1 that form the suction region.
尚、曲線c1a2b2，c2a1b1は、Ｘ軸上に中心を有
し羽根車の半径Ｒよりやや大きな半径r1の円弧で
形成され、曲線b1c1，b2c2は羽根車の回転軸と同
心で羽根車の半径Ｒよりやや大きな半径r2の円弧
で形成されると共に、Ｘ軸、及び軸心Ｏをとおる
水平軸（Ｙ軸）に対して対称である。 Note that the curves c 1 a 2 b 2 , c 2 a 1 b 1 are formed by circular arcs having a center on the X axis and a radius r 1 slightly larger than the radius R of the impeller, and the curves b 1 c 1 , b 2 c 2 is formed by an arc with a radius r 2 that is concentric with the rotation axis of the impeller and slightly larger than the radius R of the impeller, and is symmetrical about the X axis and the horizontal axis (Y axis) passing through the axis O. It is.
以上、片側のみで吸排気を行う片吸込式の、内
気口型液封式ポンプを例示して従来の１回転２作
動型液封式ポンプのケーシングの内壁の形状を説
明したが、両吸込式、及び羽根車の側部に仕切板
を設けた側気口型のものにおいてもケーシングの
内壁の形状は同様である。 Above, we have explained the shape of the inner wall of the casing of a conventional one-rotation, two-acting liquid ring pump by exemplifying a single suction type internal air port type liquid ring pump that performs intake and exhaust on only one side. The shape of the inner wall of the casing is the same in the case of , and the side vent type in which a partition plate is provided on the side of the impeller.
（考案が解決しようとする問題点）
上記のような形状のケーシングを有する従来の
液封式ポンプにおいては、点a1，a2からはじまる
吐出域において気体を徐々に圧縮し点b1，b2付近
で圧力は最大になり、次いで点b1〜c1、及び点b2
〜c2間の渡り域においては羽根車とケーシングは
同心のため気体に対して圧縮仕事はなく、従つて
この間の圧力は点b1，c1と点b2，c2との圧力に影
響され直線的に低下する。(Problem to be solved by the invention) In a conventional liquid ring pump having a casing shaped as described above, gas is gradually compressed in the discharge area starting from points a 1 and a 2 and then reaching points b 1 and b. The pressure is maximum near 2 , then points b 1 to c 1 and point b 2
In the transition area between ~ c2 , the impeller and casing are concentric, so there is no compressive work on the gas, so the pressure between them affects the pressure between points b1 , c1 and points b2 , c2. and decreases linearly.
これに加え、点c1，c2からは吸入域であり圧力
が低下するのは当然であるが、曲線b1c1，b2c2と
曲線c1a2，c2a1との接続点c1，c2が内側に突出し
ているため、c1，c2で液リング流れの急激な方向
転換がおこり、このため局部的に急激な体積膨張
をおこし、急激な圧力低下が発生する。 In addition to this, it is natural that the pressure decreases from points c 1 and c 2 as they are in the suction region, but the difference between curves b 1 c 1 , b 2 c 2 and curves c 1 a 2 , c 2 a 1 Since the connection points c 1 and c 2 protrude inward, a sudden change in direction of the liquid ring flow occurs at c 1 and c 2 , which causes a local rapid volume expansion and a sudden pressure drop. do.
このような圧力低下に起因してキヤビテーシヨ
ンが発生し羽根車、ケーシングに損傷を与えると
共に、ポンプの効率も低下するという問題点があ
る。 Cavitation occurs due to such a pressure drop, which damages the impeller and casing, and also reduces the efficiency of the pump.
（問題点を解決するための手段）
本考案は、このような問題点を解決することを
目的とするもので、本考案においてはケーシング
の内壁を形成する曲線の内、渡り域を形成する曲
線と吸入域を形成する曲線との接続点c1，c2にお
ける突出部を滑らかな曲線とすることにより局部
的な体積膨張をおさえ、急激な圧力低下を防止す
ることに成功した。(Means for solving the problem) The purpose of the present invention is to solve such problems.In the present invention, among the curves forming the inner wall of the casing, the curve forming the transition area By creating smooth curves for the protrusions at the connection points c 1 and c 2 between the curve and the curve forming the suction area, we succeeded in suppressing local volume expansion and preventing a sudden pressure drop.
以下、本考案を実施例につき図面に基づいて説
明する。 DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments and drawings.
第１図は本考案のケーシングの内壁８を形成す
る曲線を示す図面あつて、曲線A1B1，A2B2は吐
出域を形成する曲線で、羽根車の回転軸の軸心Ｏ
をとおる垂直軸（Ｘ軸）上の点A1，A2からそれ
ぞれ点B1B2にわたる、Ｘ軸上に中心を有する、
羽根車の半径Ｒよりやや大きな半径R1の円弧で、
これと連結する渡り域は、点B1，B2からそれぞ
れ、羽根車の回転軸の軸心Ｏをとおる水平軸（Ｙ
軸）上の点C1，C2にわたる、羽根車と同心で羽
根車の半径Ｒよりやや大きな半径R2の円弧B1C1，
B2C2により形成される。 FIG. 1 is a drawing showing the curves forming the inner wall 8 of the casing of the present invention, where the curves A 1 B 1 and A 2 B 2 are curves forming the discharge area, and the axis O of the rotation axis of the impeller.
extending from points A 1 and A 2 on the vertical axis (X axis) passing through the point B 1 B 2 respectively, having a center on the X axis,
An arc with a radius R 1 that is slightly larger than the radius R of the impeller,
The transition areas connected to this are from points B 1 and B 2 to the horizontal axis (Y
An arc B 1 C 1 , concentric with the impeller and having a radius R 2 slightly larger than the radius R of the impeller, spanning points C 1 and C 2 on the axis)
Formed by B 2 C 2 .
曲線C1A2，C2A1は、点C1，C2からそれぞれ点
A2A1にわたる、A1A2を長軸としC1C2を短軸とす
る楕円の弧に近接した曲線で、吸入域を形成し、
曲線B1C1A2B2、及び曲線B2C2A1B1は点C1，C2
において、それぞれ円弧B1，C1，B2，C2を形成
する円と接線P1，P2を共有し、点A2，A1におい
てそれぞれ円弧A2B2A1B1を形成する円と接線
Q2，Q1を共有する。 Curves C 1 A 2 and C 2 A 1 are connected from points C 1 and C 2 , respectively.
A curve close to the arc of an ellipse spanning A 2 A 1 with A 1 A 2 as the major axis and C 1 C 2 as the minor axis, forming an inhalation area,
Curve B 1 C 1 A 2 B 2 and curve B 2 C 2 A 1 B 1 are at points C 1 and C 2
, share tangents P 1 and P 2 with the circles forming arcs B 1 , C 1 , B 2 , and C 2 , respectively, and form arcs A 2 B 2 A 1 B 1 at points A 2 and A 1 , respectively. circle and tangent
Share Q 2 and Q 1 .
本考案のケーシングの内壁の形状は、上記のよ
うに形成されているため、渡り域から吸入域にわ
たる液リングの流れは円滑になり、このため局部
的な体積膨張は阻止され、従つて急激な圧力低下
は発生しない。 Since the shape of the inner wall of the casing of the present invention is formed as described above, the flow of the liquid ring from the transfer area to the suction area is smooth, thereby preventing local volume expansion and thus preventing rapid No pressure drop occurs.
次にその試験結果を例示する。 Next, the test results will be illustrated.
第２図はガスを大気圧から6.0Kg／CM2Ｇに圧
縮する、本考案のケーシングを備えた液封式圧縮
ポンプと従来のケーシングを備えた液封式圧縮ポ
ンプとの回転角θ°におけるケーシング内壁圧力を
比較する線図（羽根車回転数 2900RPM）であ
つて、本考案のケーシングを備えた液封式圧縮ポ
ンプは従来のものと異なり吸入域における急激な
圧力低下は認められない。 Figure 2 shows the rotation angle θ° of a liquid ring compression pump equipped with the casing of the present invention and a liquid ring compression pump equipped with a conventional casing, which compresses gas from atmospheric pressure to 6.0Kg/CM 2 G. This is a diagram comparing the inner wall pressure of the casing (impeller rotation speed 2900 RPM). Unlike conventional pumps, the liquid ring compression pump equipped with the casing of the present invention does not exhibit a sudden pressure drop in the suction region.
（効果）
以上の説明で明らかなように、本考案によれば
従来のものと異なり、渡り域を形成する曲線と吸
入域を形成する曲線とを滑らかに接続したため、
渡り域から吸入域にかけて局部的な体積膨張がな
く、従つて急激な圧力低下を阻止できるためキヤ
ビテーシヨンによる羽根車、ケーシングの損傷を
防止できると共に、ポンプの効率を向上させるこ
とが出来る。(Effects) As is clear from the above explanation, according to the present invention, unlike the conventional one, the curve forming the migratory area and the curve forming the suction area are smoothly connected.
There is no local volumetric expansion from the transition area to the suction area, and therefore a sudden drop in pressure can be prevented, so damage to the impeller and casing due to cavitation can be prevented, and the efficiency of the pump can be improved.
第１図は本考案の実施例に於けるケーシング内
壁を形成する曲線を示す図面、第２図は本考案の
試験結果を例示する線図、第３〜５図は従来の１
回転２作動型液封式ポンプのケーシングの形状を
説明するための図面で、第３図は従来の１回転２
作動型液封式ポンプの縦断面図、第４図は第３図
の−線における断面図、第５図はそのケーシ
ングの内壁を形成する曲線を示す図面である。
１……ケーシング、２……羽根車、７……羽根
車の回転軸、８，８ａ……内壁。
Fig. 1 is a diagram showing the curve forming the inner wall of the casing in the embodiment of the present invention, Fig. 2 is a diagram illustrating the test results of the present invention, and Figs.
This is a drawing for explaining the shape of the casing of a two-rotation type liquid ring pump.
FIG. 4 is a longitudinal cross-sectional view of the actuated liquid ring pump, FIG. 4 is a cross-sectional view taken along the - line in FIG. 3, and FIG. 5 is a drawing showing a curve forming the inner wall of the casing. 1... Casing, 2... Impeller, 7... Rotating shaft of impeller, 8, 8a... Inner wall.
Claims (1)
共に、曲線B1C1A2B2、及び曲線B2C2A1B1、は
点C1，C2においてそれぞれ円弧B1C1B2C2を形成
する円と接線を共有し、点A2，A1においてそれ
ぞれ円弧A2B2A1B1を形成する円と接線を共有す
るよう形成したことを特徴とする１回転２作動型
液封式ポンプのケーシング。 (イ) 吐出域を形成する曲線であつて、羽根車の回
転軸の軸心Ｏをとおる垂直軸（Ｘ軸）上の点
A1，A2からそれぞれB1，B2にわたる、Ｘ軸上
に中心を有し、かつ羽根車の半径Ｒよりやや大
きな半径R1の円弧A1B1、及び円弧A2，B2。 (ロ) 渡り域を形成する曲線であつて、前記の点
B1，B2からそれぞれ、羽根車の回転軸の軸心
Ｏをとおる水平軸（Ｙ軸）上の点C1，C2にわ
たる、羽根車と同心で羽根車の半径Ｒよりやや
大きな半径R2の円弧B1C1、及び円弧B2C2。 (ハ) 吸入域を形成する曲線であつて、前記の点
C1，C2からそれぞれA2，A1にわたる、A1A2を
長軸としC1C2を短軸とする楕円に近接した曲
線C1A2、及び曲線C2A1。[Claims for Utility Model Registration] The inner wall is formed by the following curves (a), (b), and (c), and the curves B 1 C 1 A 2 B 2 and B 2 C 2 A 1 B 1 , share a tangent with a circle forming arc B 1 C 1 B 2 C 2 at points C 1 and C 2 , respectively, and a circle forming arc A 2 B 2 A 1 B 1 at points A 2 and A 1, respectively. A casing for a one-rotation, two-acting liquid ring pump, characterized in that the casing is formed so as to share a tangent line. (b) A point on the vertical axis (X-axis) that is a curve that forms the discharge area and passes through the axis O of the impeller's rotation axis
An arc A 1 B 1 having a center on the X axis and having a radius R 1 slightly larger than the radius R of the impeller, and arcs A 2 and B 2 extending from A 1 and A 2 to B 1 and B 2 respectively. (b) A curve forming the migratory area, at the point mentioned above.
A radius R that is concentric with the impeller and slightly larger than the radius R of the impeller, extending from B 1 and B 2 to points C 1 and C 2 on the horizontal axis (Y axis) passing through the axis O of the rotation axis of the impeller, respectively. 2 arc B 1 C 1 , and arc B 2 C 2 . (c) A curve forming the inhalation area, and the point mentioned above
A curve C 1 A 2 and a curve C 2 A 1 which extend from C 1 and C 2 to A 2 and A 1 respectively, and are close to an ellipse with A 1 A 2 as a major axis and C 1 C 2 as a minor axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16068886U JPH0421036Y2 (en) | 1986-10-20 | 1986-10-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16068886U JPH0421036Y2 (en) | 1986-10-20 | 1986-10-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6365886U JPS6365886U (en) | 1988-04-30 |
| JPH0421036Y2 true JPH0421036Y2 (en) | 1992-05-13 |
Family
ID=31086300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16068886U Expired JPH0421036Y2 (en) | 1986-10-20 | 1986-10-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0421036Y2 (en) |
-
1986
- 1986-10-20 JP JP16068886U patent/JPH0421036Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6365886U (en) | 1988-04-30 |
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