JP3742478B2 - Bladeless impeller for submersible pump - Google Patents

Bladeless impeller for submersible pump Download PDF

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Publication number
JP3742478B2
JP3742478B2 JP06255397A JP6255397A JP3742478B2 JP 3742478 B2 JP3742478 B2 JP 3742478B2 JP 06255397 A JP06255397 A JP 06255397A JP 6255397 A JP6255397 A JP 6255397A JP 3742478 B2 JP3742478 B2 JP 3742478B2
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JP
Japan
Prior art keywords
impeller
bladeless
submersible pump
circumferential direction
annular shroud
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 - Lifetime
Application number
JP06255397A
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Japanese (ja)
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JPH10238494A (en
Inventor
一夫 飯坂
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tsurumi Manufacturing Co Ltd
Original Assignee
Tsurumi Manufacturing Co Ltd
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 by Tsurumi Manufacturing Co Ltd filed Critical Tsurumi Manufacturing Co Ltd
Priority to JP06255397A priority Critical patent/JP3742478B2/en
Publication of JPH10238494A publication Critical patent/JPH10238494A/en
Application granted granted Critical
Publication of JP3742478B2 publication Critical patent/JP3742478B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Description

【0001】
【発明の技術分野】
本発明は、水中ポンプ用ブレードレス形羽根車に関するものである。
【0002】
【従来技術とその問題点】
ブレードレス形羽根車においては周知のように、シュラウド裏面の要所要所にドリルで浅く穿孔を施すなどして個々の羽根車の重量バランスの修正を行っている。
【0003】
しかしその穿孔加減は専ら作業者の勘に頼るものであり、正確なバランス修正を施すためには多大の時間と手数を要し、きわめて非能率な作業であって、これが製品コストを押し上げる要因にもなっている。
【0004】
【発明の目的】
本発明の目的は、従来のようなドリルによる穿孔作業を不要とし、簡単な操作で迅速・適正な重量バランスの修正が施し得る、水中ポンプ用ブレードレス形羽根車を提供することにある。
【0005】
【発明の構成】
本発明に係る水中ポンプ用ブレードレス形羽根車では、吸込口の上方部周辺から外周方向へ漸次大径となるよう円弧状に曲成された羽根板の上下にそれぞれフランジを張設し中央の羽根入口より側方の羽根出口へ至る通水路を有する羽根車本体の上下フランジにそれぞれ環状のシュラウドを添合させてなる水中ポンプ用ブレードレス形羽根車において、上下フランジの盤面に円周方向へ配列された多数のネジ孔を有し、環状シュラウドの盤面には前記ネジ孔と対向するよう円周方向へ複数のボルト孔を配設すると共に円周方向の一定境域をバランスウエイトに形成し、バランスウエイトの形成境域と円弧状羽根板の小径部とが合致する位置において環状シュラウドと羽根車本体とをボルト締めにより一体状に定着させるよう構成した。
【0006】
【実施例】
以下実施例の図面により説明をする。
【0007】
1は羽根車本体であって、吸込口2の上方部周辺から外周方向へ漸次大径となるよう円弧状に曲成された羽根板3の上下にフランジ4,4を張設し、中央の羽根入口より側方の羽根出口へ至る通水路5を有し、かつ、上下フランジ4,4の盤面には円周方向へ等開度に多数のネジ孔6‥‥6が配設されている。7,7は羽根車本体1の上下フランジ4,4に添合される環状のシュラウドであって、そのほぼ半周部を平面扇形で鞘状の液体容入室8に形成し、残りのほぼ半周部は肉厚の増大された平面扇形のバランスウエイト9に形成し、かつ、前記ネジ孔6‥‥6に対向する複数のボルト孔10‥‥10が盤面の円周方向へ等開度に配設されるが、これらボルト孔10‥‥10は、六角穴付ボルト11の頭部が陥没するよう段付孔に形成されている。液体容入室8には容入用の窓12が設けられているが、この窓12は液体容入後に閉塞される構造であってもよく、また、常時開放されていてポンプを水中に沈めたとき窓12から液体容入室8内に水が入るという構造でもよく、後者の場合、羽根車の回転方向に向かって液体容入室8の先端部近くの周壁に設けられていることが望ましい。更にまた、水中での回転時にその回転方向から液体容入室8内へ水を流入させるという方式であってもよいが、この場合には液体容入室8内の空気を排出させるための排気路(図示せず)を併設することが必要となる。
【0008】
組立時には、バランスウエイト9の形成境域と円弧状羽根板3の小径部3bとが合致するよう円周方向に位置合わせをし、ボルト孔10‥‥10を通じて六角穴付ボルト11‥‥11のネジ部をネジ孔6‥‥6に螺合させることで、環状シュラウド7と羽根車本体1とが一体状に結合される。例えば、上下フランジ4,4のネジ孔6‥‥6の配設数が12孔であれば、上下シュラウド7,7はそれぞれ円数方向へ30゜ずつ位置をずらして取り付けることができるので重量バランスの微調整が可能となる。また、上下シュラウド7,7の一方を逆方向へ30゜ずらして取り付ければ、更に微細なバランス調整が得られるのである。なお、上下シュラウド7,7に穿設されるボルト孔10‥‥10は、それぞれ3孔または4孔が適切であり、それぞれ3本または4本のボルト11‥‥11により取り付けられることが望ましい。
【0009】
上述のようにして組み立てられたとき、液体容入室8の形成境域は円弧状羽根板3の大径部3aと合致することになる。そして水中でのポンプ運転中は液体容入室8内の液体に遠心力が働き、水力学的アンバランスに対する付加質量となる。つまり、水中での羽根車の回転時に円弧状羽根板3の大径部3aの外側から羽根車軸13に加わる側圧が、液体容入室8の外周壁内面14を遠心力で押圧する容入液体の作用によって減殺されるのである。
【0010】
【発明の効果】
本発明水中ポンプ用ブレードレス形羽根車によれば、従来のようなドリルによる穿孔作業を不要とし、簡単な操作で迅速・適正な重量バランスの修正を施し得るという利点がある。
【図面の簡単な説明】
【図1】本発明に係る水中ポンプ用ブレードレス形羽根車の縦断側面図である。
【図2】本発明に係る水中ポンプ用ブレードレス形羽根車における羽根車本体の平面図である。
【図3】図2のA−A線における縦断側面図である。
【図4】本発明に係る水中ポンプ用ブレードレス形羽根車における羽根車本体の底面図である。
【図5】本発明に係る水中ポンプ用ブレードレス形羽根車における羽根車本体の上面から定着されるシュラウドの底面図である。
【図6】図5のB−B線における縦断側面図である。
【図7】本発明に係る水中ポンプ用ブレードレス形羽根車における羽根車本体の下面から定着されるシュラウドの平面図である。
【図8】図7のC−C線における縦断側面図である。
【符号の説明】
1 羽根車本体
2 吸込口
3 羽根板
3b 羽根板の小径部
4 フランジ
5 通水路
6 ネジ孔
7 シュラウド
9 バランスウエイト
10 ボルト孔
11 ボルト
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a bladeless impeller for a submersible pump.
[0002]
[Prior art and its problems]
As is well known in the bladeless type impeller, the weight balance of each impeller is corrected by shallowly drilling a necessary portion on the back surface of the shroud with a drill.
[0003]
However, the perforation adjustment depends solely on the intuition of the operator, and it takes a lot of time and effort to correct the balance correctly, which is a very inefficient work, and this increases the product cost. It has also become.
[0004]
OBJECT OF THE INVENTION
An object of the present invention is to provide a bladeless impeller for a submersible pump, which does not require a conventional drilling operation by a drill and can be corrected quickly and appropriately by a simple operation.
[0005]
[Structure of the invention]
In the bladeless type impeller for submersible pumps according to the present invention, flanges are respectively stretched on the upper and lower sides of the blades curved in an arc shape so as to gradually increase in diameter from the periphery of the upper portion of the suction port toward the outer periphery. In submersible bladeless impellers for submersible pumps, in which annular shrouds are joined to the upper and lower flanges of the impeller body having a water passage from the blade inlet to the side blade outlet, in the circumferential direction on the surface of the upper and lower flanges A plurality of screw holes arranged, a plurality of bolt holes are arranged in the circumferential direction so as to face the screw holes on the disk surface of the annular shroud, and a constant boundary region in the circumferential direction is formed in a balance weight, The annular shroud and the impeller body are integrally fixed by bolting at a position where the balance weight forming boundary and the small-diameter portion of the arcuate blade plate coincide.
[0006]
【Example】
Hereinafter, description will be made with reference to the drawings of the embodiments.
[0007]
1 is an impeller body, and flanges 4 and 4 are stretched on the upper and lower sides of a vane plate 3 that is bent in an arc shape so as to gradually increase in diameter from the periphery of the upper portion of the suction port 2 toward the outer periphery. There is a water passage 5 from the blade inlet to the blade outlet on the side, and a number of screw holes 6... 6 are arranged at equal openings in the circumferential direction on the surface of the upper and lower flanges 4, 4. . 7 and 7 are annular shrouds joined to the upper and lower flanges 4 and 4 of the impeller body 1, and a substantially half-circumferential portion thereof is formed in a flat fan-shaped sheath-like liquid storage chamber 8, and the remaining substantially half-circumferential portion Is formed in a flat fan-shaped balance weight 9 having an increased thickness, and a plurality of bolt holes 10... 10 facing the screw holes 6. However, these bolt holes 10... 10 are formed in stepped holes so that the heads of the hexagon socket head cap bolts 11 are depressed. The liquid containing chamber 8 is provided with a window 12 for filling. However, the window 12 may be closed after the liquid is filled, and is always open and the pump is submerged in water. Sometimes, the structure may be such that water enters the liquid containing chamber 8 from the window 12, and in the latter case, it is desirable to be provided on the peripheral wall near the tip of the liquid containing chamber 8 in the rotational direction of the impeller. Furthermore, a method may be used in which water flows into the liquid storage chamber 8 from the direction of rotation when rotating in water, but in this case, an exhaust path for discharging air in the liquid storage chamber 8 ( (Not shown) is required.
[0008]
At the time of assembling, the positions of the balance weight 9 and the small-diameter portion 3b of the arcuate blade 3 are aligned in the circumferential direction, and the hexagon socket head cap screws 11... 11 are screwed through the bolt holes 10. The annular shroud 7 and the impeller body 1 are integrally coupled by screwing the portions into the screw holes 6. For example, if the number of the screw holes 6... 6 of the upper and lower flanges 4 and 4 is 12, the upper and lower shrouds 7 and 7 can be mounted by shifting their positions by 30 degrees in the direction of the number of circles. Can be finely adjusted. Further, if one of the upper and lower shrouds 7 and 7 is attached while being shifted by 30 ° in the opposite direction, a finer balance adjustment can be obtained. The bolt holes 10... 10 drilled in the upper and lower shrouds 7 and 7 are suitably 3 holes or 4 holes, respectively, and are preferably attached by 3 or 4 bolts 11.
[0009]
When assembled as described above, the formation boundary region of the liquid containing chamber 8 coincides with the large diameter portion 3 a of the arcuate blade 3. During the pump operation in water, centrifugal force acts on the liquid in the liquid storage chamber 8 and becomes an additional mass with respect to the hydraulic imbalance. That is, the side pressure applied to the impeller shaft 13 from the outside of the large-diameter portion 3a of the arc-shaped impeller 3 during rotation of the impeller in water presses the outer peripheral wall inner surface 14 of the liquid containing chamber 8 with centrifugal force. It is diminished by the action.
[0010]
【The invention's effect】
According to the bladeless impeller for a submersible pump of the present invention, there is an advantage that a conventional drilling operation by a drill is not required, and quick and proper weight balance correction can be performed with a simple operation.
[Brief description of the drawings]
FIG. 1 is a longitudinal side view of a bladeless impeller for a submersible pump according to the present invention.
FIG. 2 is a plan view of an impeller body in a bladeless impeller for a submersible pump according to the present invention.
FIG. 3 is a longitudinal side view taken along line AA in FIG. 2;
FIG. 4 is a bottom view of an impeller body in a bladeless impeller for a submersible pump according to the present invention.
FIG. 5 is a bottom view of the shroud fixed from the upper surface of the impeller body in the bladeless impeller for submersible pump according to the present invention.
6 is a longitudinal side view taken along line BB in FIG. 5;
FIG. 7 is a plan view of a shroud fixed from the lower surface of the impeller body in the bladeless impeller for submersible pump according to the present invention.
8 is a longitudinal side view taken along the line CC of FIG. 7;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Impeller body 2 Suction port 3 Blade plate 3b Small diameter part 4 of a blade plate 5 Flange 5 Water passage 6 Screw hole 7 Shroud 9 Balance weight 10 Bolt hole 11 Bolt

Claims (1)

吸込口の上方部周辺から外周方向へ漸次大径となるよう円弧状に曲成された羽根板の上下にそれぞれフランジを張設し中央の羽根入口より側方の羽根出口へ至る通水路を有する羽根車本体の上下フランジにそれぞれ環状のシュラウドを添合させてなる水中ポンプ用ブレードレス形羽根車において、上下フランジの盤面に円周方向へ配列された多数のネジ孔を有し、環状シュラウドの盤面には前記ネジ孔と対向するよう円周方向へ複数のボルト孔を配設すると共に円周方向の一定境域をバランスウエイトに形成し、バランスウエイトの形成境域と円弧状羽根板の小径部とが合致する位置において環状シュラウドと羽根車本体とをボルト締めにより一体状に定着させるよう構成したことを特徴とする、水中ポンプ用ブレードレス形羽根車。From the upper part of the suction port to the outer periphery, the flanges are stretched on the top and bottom of the blades that are curved in an arc shape so as to gradually increase in diameter, and there is a water passage from the central blade inlet to the side blade outlet. The bladeless impeller for submersible pumps, in which an annular shroud is joined to the upper and lower flanges of the impeller body, has a number of screw holes arranged in the circumferential direction on the surface of the upper and lower flanges, and the annular shroud A plurality of bolt holes are arranged in the circumferential direction so as to face the screw holes on the board surface, and a constant boundary region in the circumferential direction is formed in the balance weight. A bladeless impeller for a submersible pump, characterized in that the annular shroud and the impeller body are fixed integrally by bolting at a position where they match.
JP06255397A 1997-02-27 1997-02-27 Bladeless impeller for submersible pump Expired - Lifetime JP3742478B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP06255397A JP3742478B2 (en) 1997-02-27 1997-02-27 Bladeless impeller for submersible pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP06255397A JP3742478B2 (en) 1997-02-27 1997-02-27 Bladeless impeller for submersible pump

Publications (2)

Publication Number Publication Date
JPH10238494A JPH10238494A (en) 1998-09-08
JP3742478B2 true JP3742478B2 (en) 2006-02-01

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Family Applications (1)

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JP06255397A Expired - Lifetime JP3742478B2 (en) 1997-02-27 1997-02-27 Bladeless impeller for submersible pump

Country Status (1)

Country Link
JP (1) JP3742478B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1746290A1 (en) * 2005-07-20 2007-01-24 Rietschle Thomas Schopfheim GmbH Centrifugal compressor

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JPH10238494A (en) 1998-09-08

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