JP2584408Y2 - pump - Google Patents
pumpInfo
- Publication number
- JP2584408Y2 JP2584408Y2 JP3647993U JP3647993U JP2584408Y2 JP 2584408 Y2 JP2584408 Y2 JP 2584408Y2 JP 3647993 U JP3647993 U JP 3647993U JP 3647993 U JP3647993 U JP 3647993U JP 2584408 Y2 JP2584408 Y2 JP 2584408Y2
- Authority
- JP
- Japan
- Prior art keywords
- impeller
- impeller hub
- hub
- main shaft
- 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.)
- Expired - Lifetime
Links
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本考案は、羽根車が羽根車ハブを
介して主軸の先端部に同時回転可能に取付けられている
ポンプに係り、羽根車ハブに対する羽根車の取付け安定
性を向上させるとともに、羽根車ボス部への異物のから
み付き度を低くする技術に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pump in which an impeller is mounted on a tip end of a main shaft via an impeller hub so as to be rotatable at the same time, and improves the mounting stability of the impeller with respect to the impeller hub. In addition, the present invention relates to a technique for reducing the degree of sticking of foreign matter to the impeller boss.
【０００２】[0002]
【従来の技術】たとえば、汚水ポンプのように、羽根車
が羽根車ハブを介して主軸の先端部に同時回転可能に取
付けられている従来のポンプは、一般に、図２に示すよ
うに構成されている。2. Description of the Related Art A conventional pump, such as a sewage pump, in which an impeller is attached to the tip of a main shaft via an impeller hub so as to be able to rotate simultaneously is generally constructed as shown in FIG. ing.
【０００３】すなわち、グランドパッキン方式やメカニ
カルシール方式などの軸封構造１によって、回転自在に
軸封された主軸２の先端部２Ａをケーシング３内に臨ま
せ、この先端部２Ａに羽根車ハブ４を嵌合し、キー５に
より羽根車ハブ４を主軸２に同時回転可能に結合し、主
軸２の先端雄ねじ部２Ｂに羽根車ハブ固定ナット６を螺
合して、羽根車ハブ４を主軸２に固定するとともに、羽
根車ハブ４の後端に形成したフランジ部４Ａに羽根車７
の後端部を嵌合し、羽根車ハブ４と羽根車７の両者にト
ルク伝達ピン８を介在させて、羽根車７を羽根車ハブ４
に同時回転可能に結合している。また、羽根車７のボス
部７Ａを貫通して、羽根車固定ボルト９の軸部９Ａを主
軸２の先端部２Ａに形成した雌ねじ部２Ｃに螺合するこ
とにより、羽根車固定ボルト９の頭部９Ｂの背面を羽根
車７のボス部７Ａに形成しボルト座７ａに押付け、羽根
車固定ボルト９を介して羽根車７のボス部７Ａを主軸２
に取付けた構造になっている。[0003] More specifically, a tip end portion 2A of a main shaft 2 rotatably sealed by a shaft sealing structure 1 such as a gland packing system or a mechanical seal system faces the inside of a casing 3, and an impeller hub 4 is attached to the front end portion 2A. The impeller hub 4 is connected to the main shaft 2 by a key 5 so as to be rotatable at the same time, and an impeller hub fixing nut 6 is screwed into the male screw portion 2B at the tip end of the main shaft 2 so that the impeller hub 4 is connected to the main shaft 2. And a flange 4A formed at the rear end of the impeller hub 4
And the torque transmission pin 8 is interposed between both the impeller hub 4 and the impeller 7 to connect the impeller 7 to the impeller hub 4.
To be rotatable simultaneously. Further, the shaft 9A of the impeller fixing bolt 9 is screwed into the female screw 2C formed on the tip 2A of the main shaft 2 through the boss 7A of the impeller 7, thereby forming the head of the impeller fixing bolt 9. The back surface of the portion 9B is formed on the boss 7A of the impeller 7 and pressed against the bolt seat 7a, and the boss 7A of the impeller 7 is connected to the main shaft 2 via the impeller fixing bolt 9.
It is attached to the structure.
【０００４】つまり、羽根車７の後端部を羽根車ハブ４
の後端フランジ部４Ａに嵌合することで、羽根車７の回
転時における半径方向の振れを防止し、主軸２の雌ねじ
部２Ｃに螺合した羽根車固定ボルト９の頭部９Ｂの背面
を羽根車７のボルト座７ａに押付けることにより、羽根
車７の軸方向の移動（羽根車７の抜け）を防止するよう
に構成されている。このような構成であれば、主軸２の
回転はキー５を介して羽根車ハブ４に伝達され、羽根車
ハブ４の回転はトルク伝達ピン８を介して羽根車７に伝
達されて羽根車７を回転させる。That is, the rear end of the impeller 7 is
By fitting into the rear end flange portion 4A, the radial runout of the impeller 7 during rotation is prevented, and the back surface of the head 9B of the impeller fixing bolt 9 screwed into the female screw portion 2C of the main shaft 2 is fixed. By being pressed against the bolt seat 7a of the impeller 7, the axial movement of the impeller 7 (the detachment of the impeller 7) is prevented. With such a configuration, the rotation of the main shaft 2 is transmitted to the impeller hub 4 via the key 5, and the rotation of the impeller hub 4 is transmitted to the impeller 7 via the torque transmission pin 8, and To rotate.
【０００５】しかし、前記従来のポンプでは、羽根車ハ
ブ４に対する羽根車７の取付けが、後端フランジ部４Ａ
を羽根車７の後端部に嵌合した１箇所の嵌合構造のみに
よってなされている。つまり、羽根車７の軸方向寸法が
比較的大きいのにもかかわらず、羽根車ハブ４に対して
羽根車７がオーバーハング構造によって取付けられてい
る。したがって、羽根車ハブ４に対する羽根車７の取付
け安定性に劣る欠点がある。[0005] However, in the conventional pump, the impeller 7 is attached to the impeller hub 4 by the rear end flange 4A.
Is fitted to the rear end of the impeller 7 only at a single fitting structure. That is, the impeller 7 is attached to the impeller hub 4 by the overhang structure, despite the relatively large axial dimension of the impeller 7. Therefore, there is a disadvantage that the mounting stability of the impeller 7 to the impeller hub 4 is poor.
【０００６】また、主軸２の雌ねじ部２Ｃに螺合した羽
根車固定ボルト９の頭部９Ｂの背面で、羽根車７のボル
ト座７ａを押付けるように構成してあるために、羽根車
７のボス部７Ａの先端部にボルト座７ａを形成しなけら
ばならない。したがって、ボス部７Ａの先端部の外径寸
法Ｄ１が大きくなる。このように、先端部の外径寸法Ｄ
１が大きくなると、吸込みカバー１０の吸込口１０Ａか
らケーシング３内に吸込まれた汚水に混入している異物
がボス部７Ａの先端部にからみ付き易くなり、異物のか
らみ付きによってポンプ性能を低下させることになる。Further, since the bolt seat 7a of the impeller 7 is configured to be pressed against the back surface of the head 9B of the impeller fixing bolt 9 screwed into the female screw portion 2C of the main shaft 2, the impeller 7 A bolt seat 7a must be formed at the tip of the boss 7A. Therefore, the outer diameter dimension D1 of the tip portion of the boss 7A increases. Thus, the outer diameter D of the tip
When 1 is large, foreign matter mixed in the sewage sucked into the casing 3 from the suction port 10A of the suction cover 10 easily sticks to the tip end of the boss 7A, and the foreign matter sticks to lower the pump performance. Will be.
【０００７】[0007]
【考案が解決しようとする課題】解決しようとする問題
点は、羽根車ハブに対して羽根車がオーバーハング構造
によって取付けられているので、羽根車ハブに対する羽
根車の取付け安定性に劣る点と、羽根車ボス部における
先端部の外径寸法が大きいために、先端部に対する異物
のからみ付き度が高く、異物のからみ付きによりポンプ
性能を低下させる点である。The problem to be solved is that, since the impeller is mounted on the impeller hub by an overhang structure, the mounting stability of the impeller to the impeller hub is poor. In addition, since the outer diameter of the tip of the impeller boss is large, the degree of sticking of foreign matter to the tip is high, and the pump performance is reduced due to the sticking of foreign matter.
【０００８】[0008]
【課題を解決するための手段】本考案は、羽根車が羽根
車ハブを介して主軸の先端部に同時回転可能に取付けら
れたポンプにおいて、前記羽根車ハブが主軸の先端部に
嵌合して羽根車ハブ固定ボルトにより主軸に取付けら
れ、前記羽根車が羽根車ハブの後端部外周と軸方向前方
に変位する部位の外周の少なくとも２箇所の嵌合部を有
して羽根車ハブに嵌合されるとともに、羽根車固定ボル
トにより羽根車ハブに一体に結合されていることを特徴
とし、羽根車ハブに対する羽根車の取付け安定性を向上
させるとともに、羽根車のボス部の先端部に異物がから
み付かないようにして、ポンプ性能の低下を回避する目
的を達成した。According to the present invention, there is provided a pump in which an impeller is rotatably mounted on a tip portion of a main shaft via an impeller hub, wherein the impeller hub is fitted on the tip portion of the main shaft. The impeller is attached to the main shaft by an impeller hub fixing bolt, and the impeller has at least two fitting portions at an outer periphery of a rear end portion of the impeller hub and an outer periphery of a portion displaced axially forward. It is fitted and is integrally connected to the impeller hub by an impeller fixing bolt, improving the mounting stability of the impeller with respect to the impeller hub and at the tip of the boss of the impeller. The object of avoiding a decrease in pump performance was achieved by preventing foreign matter from being entangled.
【０００９】[0009]
【作用】本考案によれば、比較的大きい軸方向寸法をも
つ羽根車が羽根車ハブの後端部外周と軸方向前方に変位
する部位の外周の少なくとも２箇所の嵌合部を有して羽
根車ハブに嵌合して取付けられるので、オーバーハング
構造の取付けが解消される。また、羽根車のボス部の先
端部にボルト座を形成する必要がないので、ボス部先端
部の外径寸法を小さくして尖らせることができる。According to the present invention, an impeller having a relatively large axial dimension has at least two fitting portions at the outer periphery of the rear end portion of the impeller hub and at the outer periphery of a portion displaced axially forward. Since it is fitted and mounted on the impeller hub, the mounting of the overhang structure is eliminated. Further, since there is no need to form a bolt seat at the tip of the boss of the impeller, the outer diameter of the tip of the boss can be reduced and sharpened.
【００１０】[0010]
【実施例】以下、本考案の実施例を図面に基づいて説明
する。図１は本考案の一実施例を示す縦断側面図であ
り、前記図２の従来例と同一もしくは相当部分には同一
符号を付して説明する。図１において、グランドパッキ
ン方式やメカニカルシール方式などの軸封構造１によっ
て、回転自在に軸封された主軸２の先端部２Ａをケーシ
ング３内に臨ませ、この先端部２Ａに羽根車ハブ４を嵌
合し、たとえば、羽根車ハブ４の先端にボルト１１によ
って取付けられている環状の座金１２を貫通して、羽根
車ハブ固定ボルト１３の軸部１３Ａを主軸２の先端部２
Ａに形成した雌ねじ部２Ｃに螺合するとともに、羽根車
ハブ４と主軸２の間にキー５を介在させることにより、
羽根車ハブ４を主軸２に同時回転可能に取付けている。
なお、環状の座金１２は必ずしもボルト１１によって取
付けなくともよく、また、環状の座金１２の使用を省略
した構成であってもよい。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional side view showing an embodiment of the present invention. The same or corresponding parts as those of the conventional example of FIG. In FIG. 1, a tip end 2A of a main shaft 2 rotatably sealed by a shaft sealing structure 1 such as a gland packing system or a mechanical seal system faces a casing 3, and an impeller hub 4 is attached to the front end 2A. For example, the shaft portion 13A of the impeller hub fixing bolt 13 is fitted through the annular washer 12 attached to the tip end of the impeller hub 4 by a bolt 11, and
A is screwed into the female screw portion 2C formed in A, and the key 5 is interposed between the impeller hub 4 and the main shaft 2,
An impeller hub 4 is attached to the main shaft 2 so as to be able to rotate simultaneously.
Note that the annular washer 12 does not necessarily have to be attached by the bolt 11, and a configuration in which the use of the annular washer 12 may be omitted.
【００１１】羽根車ハブ４は、その後端部に半径方向外
周に張出すフランジ部４Ａが形成され、先端部に小径部
４Ｂを形成した段状になっている。一方、羽根車７のボ
ス部７Ａには、羽根車ハブ固定ボルト１３の角孔１３Ｃ
に嵌合されるレンチなどの工具を挿通し得る大きさの工
具挿通孔７Ｂと、羽根車ハブ４の小径部４Ｂに嵌合され
る第１嵌合部７Ｃおよび羽根車ハブ４のフランジ部４Ａ
に嵌合される第２嵌合部７Ｄが前から順に軸方向に変位
して形成され、第１嵌合部７Ｃを小径部４Ｂに嵌合し、
第２嵌合部７Ｄをフランジ部４Ａに嵌合するとともに、
フランジ部４Ａを貫通して複数の羽根車固定ボルト９
（ただし、図面には１つの羽根車固定ボルト９のみを示
している）の軸部をボス部７Ａの背面に形成した雌ねじ
部に螺合することにより、羽根車７を羽根車ハブ４に一
体に結合している。さらに、複数の羽根車固定ボルト９
の他に、羽根車ハブ４と羽根車７の両者に従来例で示し
たトルク伝達ピン８を介在させてもよい。The impeller hub 4 is formed in a stepped shape with a flange portion 4A projecting radially outward at the rear end portion and a small diameter portion 4B formed at the front end portion. On the other hand, the boss 7A of the impeller 7 has a square hole 13C of the impeller hub fixing bolt 13.
A tool insertion hole 7B large enough to allow a tool such as a wrench to be fitted to the first fitting portion, a first fitting portion 7C fitted to the small diameter portion 4B of the impeller hub 4, and a flange portion 4A of the impeller hub 4.
The second fitting portion 7D fitted to the first fitting portion 7D is formed by being sequentially displaced in the axial direction from the front, and the first fitting portion 7C is fitted to the small diameter portion 4B,
While fitting the second fitting portion 7D to the flange portion 4A,
A plurality of impeller fixing bolts 9 penetrating through the flange portion 4A
By screwing a shaft portion (only one impeller fixing bolt 9 is shown in the drawing) to a female screw portion formed on the back surface of the boss portion 7A, the impeller 7 is integrated with the impeller hub 4. Is bound to. Further, a plurality of impeller fixing bolts 9
Alternatively, the torque transmission pin 8 shown in the conventional example may be interposed in both the impeller hub 4 and the impeller 7.
【００１２】このような構成であれば、主軸２の回転は
キー５を介して羽根車ハブ４に伝達され、羽根車ハブ４
の回転は複数の羽根車固定ボルト９を介して羽根車７に
伝達されて羽根車７を回転させる。羽根車７の回転時に
おける半径方向の振れは、羽根車７のボス部７Ａに形成
した第１嵌合部７Ｃが羽根車ハブ４の小径部４Ｂに嵌合
し、第２嵌合部７Ｄが羽根車ハブ４のフランジ部４Ａに
嵌合していることによって防止され、羽根車７の軸方向
の移動、すなわち羽根車７の抜けは、羽根車ハブ固定ボ
ルト１３の軸部１３Ａを主軸２の先端部２Ａに形成した
雌ねじ部２Ｃに螺合することによって防止される。な
お、メンテナンスなどに際する羽根車７と羽根車ハブ４
の分解作業は、羽根車７のボス部７Ａに形成した工具挿
通孔７Ｂからレンチなどの工具（図示省略）を挿通し
て、その先端角型部を羽根車ハブ固定ボルト１３の角孔
１３Ｃに嵌合し、工具を回転させて固定ボルト１３と主
軸２の雌ねじ部２Ｃとの螺合を解き、羽根車７の背面外
周部とライナー部１４の間の隙間に引抜き工具（図示省
略）の係止爪を入れて引抜くことによって行うことがで
きる。With such a configuration, the rotation of the main shaft 2 is transmitted to the impeller hub 4 via the key 5, and the impeller hub 4
Is transmitted to the impeller 7 via a plurality of impeller fixing bolts 9 to rotate the impeller 7. When the impeller 7 rotates in the radial direction, the first fitting portion 7C formed on the boss 7A of the impeller 7 fits into the small-diameter portion 4B of the impeller hub 4, and the second fitting portion 7D The axial movement of the impeller 7, that is, the disengagement of the impeller 7, is prevented by the fitting to the flange portion 4 </ b> A of the impeller hub 4, and the shaft portion 13 </ b> A of the impeller hub fixing bolt 13 is It is prevented by screwing into the female screw 2C formed on the tip 2A. The impeller 7 and the impeller hub 4 for maintenance and the like are used.
The disassembly work is performed by inserting a tool (not shown) such as a wrench from a tool insertion hole 7B formed in the boss 7A of the impeller 7 and inserting the tip square portion into the square hole 13C of the impeller hub fixing bolt 13. The tool is rotated, the tool is rotated, and the screw between the fixing bolt 13 and the female screw portion 2C of the main shaft 2 is unfastened. This can be done by inserting the pawl and pulling it out.
【００１３】このように、比較的大きい軸方向寸法をも
つ羽根車７が第１嵌合部７Ｃと第２嵌合部７Ｄの２箇所
の嵌合部を有して羽根車ハブ４に嵌合して取付けられて
いるので、従来例のようなオーバーハング構造による取
付けが解消され、羽根車ハブ４に対する羽根車７の取付
け安定性が向上する。また、羽根車７のボス部７Ａの先
端部の外径寸法Ｄ２の大きさは、工具挿通孔７Ｂのみを
形成できる大きさでよい、つまり、従来例のようにボル
ト座７ａ（図２参照）を形成する必要がないので、先端
部の外径寸法Ｄ２を従来例の先端部の外径寸法Ｄ１より
も小さくして、ボス部７Ａの先端部を尖らせることがで
きる。そのために、吸込みカバー１０の吸込口１０Ａか
らケーシング３内に吸込まれた汚水に混入している異物
がボス部７Ａの先端部に対してからみ付き難くなり、異
物がからみ付くことによって生じるポンプ性能の低下を
回避することができる。As described above, the impeller 7 having a relatively large axial dimension has the first fitting portion 7C and the second fitting portion 7D and is fitted to the impeller hub 4. The mounting by the overhang structure as in the conventional example is eliminated, and the mounting stability of the impeller 7 to the impeller hub 4 is improved. The outer diameter D2 of the tip of the boss portion 7A of the impeller 7 may be such that only the tool insertion hole 7B can be formed, that is, the bolt seat 7a as in the conventional example (see FIG. 2). Is not required, the outer diameter D2 of the distal end can be made smaller than the outer diameter D1 of the distal end of the conventional example, and the distal end of the boss 7A can be sharpened. For this reason, foreign matter mixed in the sewage sucked into the casing 3 from the suction port 10A of the suction cover 10 becomes difficult to stick to the tip of the boss portion 7A, and the pump performance caused by the foreign matter sticking is reduced. Drops can be avoided.
【００１４】なお、前記実施例では、本考案を汚水ポン
プに適用して説明しているが、汚水ポンプのみに限らず
他のポンプにも適用可能である。In the above embodiment, the present invention is described as applied to a sewage pump. However, the present invention is not limited to a sewage pump but can be applied to other pumps.
【００１５】[0015]
【考案の効果】以上説明したように、本考案は、少なく
とも２箇所の嵌合部を有して羽根車を羽根車ハブに嵌合
して取付けているので、オーバーハング構造による取付
けが解消され、羽根車ハブに対する羽根車の取付け安定
性が向上する。また、羽根車のボス部の先端部にボルト
座を形成する必要がないので、ボス部の先端部の外径寸
法を小さくして、ボス部の先端部を尖らせることができ
る。そのために、ボス部の先端部に対する異物のからみ
付き度が低くなり、異物がからみ付くことによって生じ
るポンプ性能の低下を回避することができる。As described above, according to the present invention, since the impeller is fitted to the impeller hub with at least two fitting portions, the mounting by the overhang structure is eliminated. In addition, the mounting stability of the impeller with respect to the impeller hub is improved. Further, since there is no need to form a bolt seat at the tip of the boss of the impeller, the outer diameter of the tip of the boss can be reduced, and the tip of the boss can be sharpened. For this reason, the degree of sticking of foreign matter to the tip of the boss portion is reduced, and a decrease in pump performance caused by the foreign matter being found can be avoided.
【図１】本考案の一実施例を示す縦断側面図である。FIG. 1 is a longitudinal sectional side view showing one embodiment of the present invention.
【図２】従来例の縦断側面図である。FIG. 2 is a longitudinal sectional side view of a conventional example.
２ 主軸 ２Ａ 主軸の先端部 ４ 羽根車ハブ ４Ａ 羽根車ハブの後端フランジ部 ４Ｂ 羽根車ハブの先端小径部 ７ 羽根車 ７Ｃ 第１嵌合部 ７Ｄ 第２嵌合部 ９ 羽根車固定ボルト １３ 羽根車ハブ固定ボルト Reference Signs List 2 Main shaft 2A Main shaft tip 4 Impeller hub 4A Impeller hub rear end flange portion 4B Impeller hub tip small diameter portion 7 Impeller 7C First fitting portion 7D Second fitting portion 9 Impeller fixing bolt 13 Blade Car hub fixing bolt
Claims (1)
部に同時回転可能に取付けられたポンプにおいて、前記
羽根車ハブが主軸の先端部に嵌合して羽根車ハブ固定ボ
ルトにより主軸に取付けられ、前記羽根車が羽根車ハブ
の後端部外周と軸方向前方に変位する部位の外周の少な
くとも２箇所の嵌合部を有して羽根車ハブに嵌合される
とともに、羽根車固定ボルトにより羽根車ハブに一体に
結合されていることを特徴とするポンプ。1. A pump in which an impeller is rotatably mounted on a tip portion of a main shaft via an impeller hub, wherein the impeller hub is fitted on the tip portion of the main shaft, and the main shaft is fixed by an impeller hub fixing bolt. And the impeller is fitted to the impeller hub with at least two fitting portions on an outer periphery of a rear end portion of the impeller hub and an outer periphery of a portion displaced axially forward. A pump which is integrally connected to an impeller hub by a fixing bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3647993U JP2584408Y2 (en) | 1993-07-02 | 1993-07-02 | pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3647993U JP2584408Y2 (en) | 1993-07-02 | 1993-07-02 | pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH078587U JPH078587U (en) | 1995-02-07 |
| JP2584408Y2 true JP2584408Y2 (en) | 1998-11-05 |
Family
ID=12470958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3647993U Expired - Lifetime JP2584408Y2 (en) | 1993-07-02 | 1993-07-02 | pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2584408Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5286281U (en) * | 1975-12-23 | 1977-06-28 |
-
1993
- 1993-07-02 JP JP3647993U patent/JP2584408Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH078587U (en) | 1995-02-07 |
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| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |