JPH07124589A - Screw for aeration agitator - Google Patents
Screw for aeration agitatorInfo
- Publication number
- JPH07124589A JPH07124589A JP5297519A JP29751993A JPH07124589A JP H07124589 A JPH07124589 A JP H07124589A JP 5297519 A JP5297519 A JP 5297519A JP 29751993 A JP29751993 A JP 29751993A JP H07124589 A JPH07124589 A JP H07124589A
- Authority
- JP
- Japan
- Prior art keywords
- screw
- aeration
- power
- blade
- tip
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はスクリュー型自給式曝気
撹拌機に於いて、特に通気量を絞り込んだときに動力増
大を抑制できる形状とした省電力型の曝気撹拌機用スク
リューに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw type self-contained aeration agitator, and more particularly to a screw for a power saving aeration agitator having a shape capable of suppressing an increase in power when a ventilation amount is narrowed. .
【０００２】[0002]
【従来の技術】従来曝気装置に用いられる自給式曝気機
の曝気撹拌機用スクリューはスクリュー軸の先端に螺旋
羽根を取り付け、さらに必要に応じて螺旋羽根の先端に
遠心羽根を組み合わせたものが提案されている。2. Description of the Related Art A screw for aeration agitator of a self-contained aerator conventionally used in an aerator is proposed by attaching a spiral blade to the tip of the screw shaft and further combining a centrifugal blade to the tip of the spiral blade if necessary. Has been done.
【０００３】[0003]
【発明が解決しようとする課題】しかし、従来の曝気撹
拌用スクリューは、その回転により中央部に負圧が発生
し、通気時には負圧により空気が吸引され中央部は多量
に空気を含んだ水となるが、嫌気撹拌のために通気量を
絞り込んだとき、空気の減った分だけ前方の水を中央部
に引き込む流れが生じ、中央部の回転する羽根に当たる
ため動力が増大する。この動力が大幅に増大することに
より、電動機容量のアップを強いられ、設備費やランニ
ングコストが割高になる欠点を有していた。However, in the conventional aeration stirring screw, a negative pressure is generated in the central portion due to its rotation, and the air is sucked by the negative pressure during aeration, and the central portion contains water containing a large amount of air. However, when the air flow rate is narrowed down for anaerobic stirring, a flow that draws the water in front to the central portion due to the decrease in the air is generated and hits the rotating blades in the central portion to increase the power. Due to the large increase in power, the capacity of the electric motor must be increased, and the equipment cost and running cost are high.
【０００４】本発明は曝気時の通気量を確保し、かつ特
に嫌気撹拌時の動力が曝気時に対し増大する割合を抑制
することの可能なスクリューにより、省電力のスクリュ
ー式曝気撹拌機を提供することを目的とする。The present invention provides a power-saving screw-type aeration stirrer with a screw capable of ensuring a ventilation rate during aeration and suppressing the rate of increase in power during anaerobic agitation compared with aeration. The purpose is to
【０００５】[0005]
【課題を解決するための手段】本発明は上記目的を達成
するためになしたもので、スクリュー軸の先端に、数条
の螺旋羽根を一体に設けると共にこの螺旋羽根の先端に
形成される遠心羽根にて曝気撹拌用スクリューを構成さ
れ、さらにこの曝気撹拌用スクリューの先端にスクリュ
ー軸の軸心と直交する方向に円板を配したことを要旨と
する。SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and is provided with several spiral blades integrally at the tip of a screw shaft and a centrifugal formed at the tip of the spiral blade. The gist of the invention is that a blade constitutes an aeration stirring screw, and a disk is arranged at the tip of the aeration stirring screw in a direction orthogonal to the axis of the screw shaft.
【０００６】[0006]
【作用】従来のスクリューでは、その回転により中央部
に負圧が発生し、通気時には負圧により空気が吸引され
中央部は多量に空気を含んだ水となるが、通気を絞ると
空気の減った分だけ前方の水を中央部に引き込む流れが
生じ、中央部の回転する羽根に当たるため動力が増大す
る。これを阻止するため本発明では数条の螺旋羽根と、
この螺旋羽根の先端に形成される遠心羽根にて構成され
る曝気撹拌用スクリューの先端にスクリュー軸の軸心と
直交する方向に円板を設けると共に、遠心羽根の寸法
を、螺旋羽根との合流点直径以内に抑えるようにする。
これにより円板を設けることで前方の水が中央部に引き
込まれる流れは殆ど阻止される。なお一部の水は遠心羽
根外周先端から内側に流れ込もうとするが、遠心力で外
周へはじき出される。さらに本発明では最大通気量を保
持し得る遠心羽根の寸法を、螺旋羽根との合流点直径以
内に抑えるようにしたため、通気時の通気量は変化な
く、通気時さらには通気を２％以下に絞り込んだときに
も、上述の抵抗が軽減され動力を低下できるようになっ
た。[Function] With a conventional screw, a negative pressure is generated in the central portion due to its rotation, and air is sucked by the negative pressure during aeration to become water containing a large amount of air in the central portion. A flow that draws water in the front part to the center part is generated, and the power increases because it hits the rotating blades in the center part. In order to prevent this, in the present invention, several spiral blades,
A disk is provided at the tip of the aeration stirring screw formed by the centrifugal blade formed at the tip of the spiral blade in the direction orthogonal to the axis of the screw shaft, and the size of the centrifugal blade is adjusted to meet the spiral blade. Try to keep it within the point diameter.
Thus, by providing the disc, the flow of water in the front drawn into the central portion is almost blocked. A portion of the water tries to flow inward from the outer peripheral tip of the centrifugal blade, but is repelled to the outer periphery by centrifugal force. Further, in the present invention, since the size of the centrifugal blade capable of holding the maximum air flow rate is kept within the diameter of the confluence point with the spiral blade, the air flow rate during air flow does not change, and the air flow during air flow is further reduced to 2% or less. Even when the aperture is narrowed down, the above resistance is reduced and the power can be reduced.
【０００７】[0007]
【実施例】以下本発明曝気撹拌機用スクリュー、を図示
の実施例にもとづいて説明する。図において１は、自給
式の曝気撹拌機用スクリューの中空状のスクリュー軸
で、このスクリュー軸の先端に数条の螺旋羽根２を所定
間隔とピッチで螺旋状にして一体に設けると共に、この
螺旋羽根２の先端に遠心羽根３が一体に形成される。EXAMPLE A screw for an aeration stirrer of the present invention will be described below with reference to the illustrated example. In the figure, 1 is a hollow screw shaft of a self-contained screw for aeration stirrer, and several spiral blades 2 are integrally provided in a spiral shape at a predetermined interval and a pitch at the tip of this screw shaft. The centrifugal blade 3 is integrally formed at the tip of the blade 2.
【０００８】このようにして螺旋羽根２の先端に遠心羽
根３を一体に設けて曝気撹拌用スクリューを構成すると
共に、この曝気撹拌用スクリューの先端にスクリュー軸
１の軸心と直交する方向に円板４を配して一体とする。Thus, the centrifugal blade 3 is integrally provided at the tip of the spiral blade 2 to form a screw for aeration and stirring, and the tip of the screw for aeration and stirring is circular in a direction orthogonal to the axis of the screw shaft 1. The plate 4 is arranged and integrated.
【０００９】さらに螺旋羽根２の先端に遠心羽根３を一
体に設ける場合、遠心羽根部を螺旋羽根２との合流点直
径以内に抑えるようにする。この遠心羽根３は図示のよ
うに螺旋羽根と個別に形成し、これを溶着等にて一体と
するか、あるいは螺旋羽根の先端部を屈曲して形成する
ことも可能である。Further, when the centrifugal blade 3 is integrally provided at the tip of the spiral blade 2, the centrifugal blade portion is kept within the confluence diameter with the spiral blade 2. The centrifugal blade 3 can be formed separately from the spiral blade as shown in the figure, and can be integrated by welding or the like, or can be formed by bending the tip of the spiral blade.
【００１０】次に本発明の曝気撹拌用スクリューを用い
た実験により効果を測定した結果の一例をあげて説明す
る。実験に使用したスクリューは、通気時の動力が７．
５ｋｗ程度のもので、先端に羽根最大外径の７０％程度
の円板４を取り付けた。その結果、通気時の通気量及び
動力は変化なく、通気を２％以下に絞り込んだときの動
力は約８％（０．８１ｋｗ）低下した。Next, an example of the result of measuring the effect by an experiment using the screw for aeration and stirring of the present invention will be described. The screw used in the experiment has a power of 7.
A disk 4 having a diameter of about 5 kW and about 70% of the maximum outer diameter of the blade was attached to the tip. As a result, there was no change in the ventilation amount and power during ventilation, and the power when the ventilation was reduced to 2% or less decreased by about 8% (0.81 kw).
【００１１】さらに円板４を取り付けたスクリューで、
螺旋羽根２と遠心羽根３の縁の合流点５の径まで軸芯に
平行に遠心羽根３の突出を削り落とした結果、通気時の
通気量には殆ど影響なく、動力が通気時で約６％（０．
４４ｋｗ）、通気を絞り込んだときで約１８％（１．７
６ｋｗ）低下した。Further, with a screw to which the disc 4 is attached,
As a result of scraping off the protrusion of the centrifugal blade 3 parallel to the axis to the diameter of the confluence point 5 of the edges of the spiral blade 2 and the centrifugal blade 3, there is almost no effect on the ventilation amount during ventilation, and the power is about 6 during ventilation. % (0.
44 kW), about 18% (1.7 when narrowed down ventilation)
6 kW).
【００１２】以上の如き実験結果により、従来のスクリ
ューに対し円板４を取り付け遠心羽根最大直径を螺旋羽
根２と遠心羽根３の縁の合流点５の直径とすることで、
通気量に影響なく通気を絞り込んだときの動力、さらに
は通気時の動力を低下せしめることが可能となり省電力
化が図れる。From the above experimental results, the disk 4 is attached to the conventional screw and the maximum diameter of the centrifugal blade is set to the diameter of the confluence 5 of the edges of the spiral blade 2 and the centrifugal blade 3,
It is possible to reduce the power when the ventilation is narrowed down without affecting the ventilation amount, and further it is possible to reduce the power consumption when the ventilation is performed.
【００１３】[0013]
【発明の効果】本発明曝気撹拌機用スクリューは、スク
リュー軸の先端に、数条の螺旋羽根を一体に設けると共
にこの螺旋羽根の先端に形成される遠心羽根にて曝気撹
拌用スクリューを構成され、さらにこの曝気撹拌用スク
リューの先端にスクリュー軸の軸心と直交する方向に円
板を配しているため、通気量に影響なく通気を絞り込ん
だときの動力、さらには通気時の動力を低下せしめるこ
とができ、これにより省電力化が図れる等の利点を有す
る。EFFECTS OF THE INVENTION The screw for aeration and agitation of the present invention comprises several spiral blades integrally provided at the tip of the screw shaft, and the centrifugal blade formed at the tip of the spiral blade constitutes the aeration and agitation screw. In addition, since a disk is placed at the tip of this aeration stirring screw in a direction orthogonal to the axis of the screw shaft, the power when the ventilation is narrowed down without affecting the ventilation volume, and further the power during ventilation is reduced. Therefore, there is an advantage that power can be saved.
【図１】本発明曝気撹拌機用スクリューの一実施例を示
す正面図である。FIG. 1 is a front view showing an embodiment of a screw for an aeration stirrer of the present invention.
【図２】従来形の曝気撹拌機用スクリューを示す正面図
である。FIG. 2 is a front view showing a conventional screw for an aeration stirrer.
【図３】本発明曝気撹拌機用スクリューの無通気時と通
気時の水及び空気の流れを示す説明図である。FIG. 3 is an explanatory diagram showing the flow of water and air when the screw for aeration agitator of the present invention is aerated and when aerated.
【図４】従来形の曝気撹拌機用スクリューの無通気時と
通気時の水及び空気の流れを示す説明図である。FIG. 4 is an explanatory view showing the flow of water and air when the conventional screw for aeration agitator is not aerated and when aerated.
【図５】スクリュー軸の動力と動力低下との関係を示す
グラフ図である。FIG. 5 is a graph showing a relationship between power of a screw shaft and power reduction.
１ スクリュー軸 ２ 螺旋羽根 ３ 遠心羽根 ４ 円板 ５ 螺旋羽根と遠心羽根の縁の合流点 1 Screw shaft 2 Spiral blade 3 Centrifugal blade 4 Disc 5 Confluence point of spiral blade and edge of centrifugal blade
Claims (1)
を一体に設けると共にこの螺旋羽根の先端に形成される
遠心羽根にて曝気撹拌用スクリューを構成され、さらに
この曝気撹拌用スクリューの先端にスクリュー軸の軸心
と直交する方向に円板を配したことを特徴とする曝気撹
拌機用スクリュー。1. A screw shaft for aeration and agitation is formed by integrally providing several spiral blades at the tip of the screw shaft, and a centrifugal blade formed at the tip of the spiral blade constitutes the aeration and agitation screw. A screw for an aeration stirrer, wherein a disk is arranged in a direction orthogonal to the axis of the screw shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5297519A JP2967020B2 (en) | 1993-11-02 | 1993-11-02 | Screw for aeration stirrer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5297519A JP2967020B2 (en) | 1993-11-02 | 1993-11-02 | Screw for aeration stirrer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07124589A true JPH07124589A (en) | 1995-05-16 |
| JP2967020B2 JP2967020B2 (en) | 1999-10-25 |
Family
ID=17847577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5297519A Expired - Fee Related JP2967020B2 (en) | 1993-11-02 | 1993-11-02 | Screw for aeration stirrer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2967020B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102661282A (en) * | 2012-04-16 | 2012-09-12 | 杭州萧山美特轻工机械有限公司 | Open type spiral paper pulp pump |
-
1993
- 1993-11-02 JP JP5297519A patent/JP2967020B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102661282A (en) * | 2012-04-16 | 2012-09-12 | 杭州萧山美特轻工机械有限公司 | Open type spiral paper pulp pump |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2967020B2 (en) | 1999-10-25 |
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