JPS59108897A - Bearing device of submergible pump - Google Patents
Bearing device of submergible pumpInfo
- Publication number
- JPS59108897A JPS59108897A JP21681682A JP21681682A JPS59108897A JP S59108897 A JPS59108897 A JP S59108897A JP 21681682 A JP21681682 A JP 21681682A JP 21681682 A JP21681682 A JP 21681682A JP S59108897 A JPS59108897 A JP S59108897A
- Authority
- JP
- Japan
- Prior art keywords
- cooling water
- bearing
- motor
- radial bearing
- impeller
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明はサブマージプルポンプ、特ニサブ？ −ジプル
モータのモータ室の上部に、そのモータ軸を支持するラ
ジアル軸受を設けたサブマージプルポンプの軸受装置に
関するものである。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a submerged pull pump, a submerged pull pump, and a submerged pull pump. - This invention relates to a bearing device for a submerged pull pump in which a radial bearing for supporting the motor shaft of the jipple motor is provided in the upper part of the motor chamber of the jipple motor.
従来のサブマージプルポンプは第１図に示すように、主
インペラ部Ａとサブマージプルモータ部Ｂとからなυ、
前者の主インペラ部Ａは、ポンプ軸３ａに取付けられた
主インペラ１および案内羽根２により構成されている。As shown in Figure 1, a conventional submerged pull pump consists of a main impeller part A and a submerged pull motor part B.
The former main impeller section A is composed of a main impeller 1 and guide vanes 2 attached to a pump shaft 3a.
後者のサブマージプルモータ部Ｂは、ポンプ軸３ａの下
部にはめ込んで一体に結合したモータ軸３ｂに取付けら
れた回転子４と、モータケーシング６の内側に取付けら
れた固定子５と、前記モータ軸３ｂの下端に一体に形成
された冷却水循環用補助インペラを兼用するスラストデ
ィスク７とにょシ構成されている。The latter submerged pull motor section B includes a rotor 4 attached to a motor shaft 3b that is fitted into the lower part of the pump shaft 3a and coupled together, a stator 5 attached to the inside of the motor casing 6, and the motor shaft 3a. A thrust disk 7, which also serves as an auxiliary impeller for circulating cooling water, is integrally formed at the lower end of the impeller 3b.
上記スラストディスク７は上、下部スラスト軸受６ａ、
６ｂによ多回転自在に支持されると共に、そのスラスト
ディスク７には上向方向の通路７ａが複数個設けられて
いる。また前記モータ軸３ｂの上、下部は内モータケー
ジング６ａの上、下部内側にそれぞれ取付けられた上、
下部ラジアル軸受９ａ、９ｂによ多回転自在に支持され
ている。The thrust disk 7 has upper and lower thrust bearings 6a,
The thrust disk 7 is rotatably supported by the thrust disk 6b, and the thrust disk 7 is provided with a plurality of upward passages 7a. Further, the upper and lower parts of the motor shaft 3b are respectively attached to the upper and lower inner sides of the inner motor casing 6a.
It is rotatably supported by lower radial bearings 9a and 9b.
上記のように構成された従来のカブマージプルポンプで
は、ポンプ軸３ａの回転に伴って補助インペラ７が回転
すると、モータ室底部ｌｏｂ内のモータ冷却水はスラス
トディスク７の通路７ａを上昇し、上部スラスト軸受８
ａおよび下部ラジアル軸受９ｂを流通した後にモータ回
転子４およびモータ固定子５の間を流通し、ついで上部
ラジアル軸受９ａを流通してモータ室上部１０ａ内に流
入する。この室上部１０ａに流入した冷却水はさらに配
ｆｌ １８％熱交換器１２および配管１１ｂを経てモー
タ室底部１０ｂに圧入され、以降は前記と同様に循環し
てモータ室内を冷却する。In the conventional cub merge pull pump configured as described above, when the auxiliary impeller 7 rotates with the rotation of the pump shaft 3a, the motor cooling water in the motor chamber bottom lob rises through the passage 7a of the thrust disk 7. Upper thrust bearing 8
a and the lower radial bearing 9b, then flows between the motor rotor 4 and the motor stator 5, and then flows through the upper radial bearing 9a and flows into the motor chamber upper part 10a. The cooling water flowing into the upper part 10a of the chamber is further forced into the bottom part 10b of the motor chamber via the 18% heat exchanger 12 and piping 11b, and thereafter circulates in the same manner as described above to cool the inside of the motor chamber.
上記のように冷却水をモータ室底部ｉｏｂより揚水し、
モータ室上部１０ａの方向へ流して循環させる方法では
、モータ軸３ｂおよびポンプ軸３ａを支持する上部ラジ
アル軸受９ａは静圧軸受の機能を発揮しない欠点がある
。またサブマージプルポンプは軸系振動の加振力となる
主インペラ部Ａを上部に設置する構造であるため、上部
ラジアル軸受９ａに作用する荷重が大であるから、その
軸受９ａが著しく摩耗するばかりでなく、サブマージプ
ルポンプ軸系の固有振動数も低下する欠点がある。As mentioned above, the cooling water is pumped up from the bottom iob of the motor room,
The method of circulating the fluid in the direction of the upper part 10a of the motor chamber has the disadvantage that the upper radial bearing 9a that supports the motor shaft 3b and the pump shaft 3a does not function as a hydrostatic bearing. In addition, since the submerged pull pump has a structure in which the main impeller part A, which generates the excitation force for shaft system vibration, is installed at the top, the load acting on the upper radial bearing 9a is large, which causes significant wear on the bearing 9a. Moreover, the natural frequency of the submerged pull pump shaft system also decreases.
本発明は上記にかんがみモータ室上部に設けた上部ラジ
アル軸受に静圧軸受の機能を持たせ、その上部ラジアル
軸受の摩耗を防止すると共に、サブマージプルポンプ軸
系の固有龜動数を高度に維持することを目的とするもの
である。In consideration of the above, the present invention provides the upper radial bearing provided in the upper part of the motor chamber with the function of a static pressure bearing, thereby preventing wear of the upper radial bearing and maintaining a high degree of inherent rotational frequency of the submerged pull pump shaft system. The purpose is to
本発明は上記目的を達成するために、モータ室の上部に
、ポンプ軸と一体に結合されたモータ軸の上部を回転自
在に支持する上部ラジアル軸受を設けると共に、そのモ
ータ軸の下部に取付けた冷却水循環用補助インペラ兼用
するスラストディスクを前記モータ室の底部に設けてな
るサブマージプルポンプにおいて、前記補助インペラ兼
用スラストディスク７に下向き方向の冷却水通路を設け
、その補助インペラにより冷却水を前記冷却水通路およ
び外部の熱交換器を経てモータ室上部に流入させて前記
ラジアル軸受に圧太し、このラジアル軸受に静圧軸゛受
の機能を持たせたものである。In order to achieve the above object, the present invention provides an upper radial bearing in the upper part of the motor chamber to rotatably support the upper part of the motor shaft that is integrally connected to the pump shaft, and an upper radial bearing that is attached to the lower part of the motor shaft. In a submerged pull pump in which a thrust disk that also serves as an auxiliary impeller for cooling water circulation is provided at the bottom of the motor chamber, a downward cooling water passage is provided in the thrust disk 7 that also serves as an auxiliary impeller, and the auxiliary impeller circulates the cooling water. The water flows into the upper part of the motor chamber through a water passage and an external heat exchanger and is compressed into the radial bearing, giving the radial bearing the function of a hydrostatic bearing.
以下本発明の一実施例を図面について説明する。 An embodiment of the present invention will be described below with reference to the drawings.
第２図ないし第４図に示す符号のうち、第１図の符号と
同一のものは同一または該当する部分を示すものとする
。Among the symbols shown in FIGS. 2 to 4, the same symbols as those in FIG. 1 indicate the same or corresponding parts.
第２図において、６ａ、６ｂは内モータケーシングおよ
び外モータケーシング、７はポンプ軸、３ ａにはめ込
まれて一体に結合されたモータ軸３ｂの下端に一体に形
成された冷却水循環用補助インペラ兼用スラストディス
クで、このスラストディスク７には、第４図に示すよう
に下向き方向の通路７ａが複数個設けられている。９ａ
はモータ軸受９ａはモータ軸３ｂの部を回転自在に支持
するラジアル軸受で、この軸受９ａは内モータクーシン
グ６ａの上端に一体に形成された軸受ブラケット６ａＩ
に取付けられている。In Fig. 2, 6a and 6b are an inner motor casing and an outer motor casing, 7 is a pump shaft, and is also used as an auxiliary impeller for cooling water circulation, which is integrally formed at the lower end of the motor shaft 3b that is fitted into 3a and coupled together. The thrust disk 7 is provided with a plurality of downward passages 7a as shown in FIG. 9a
The motor bearing 9a is a radial bearing that rotatably supports the motor shaft 3b.
installed on.
上記軸受ブラケット６ａ１には、第３図に示すようにパ
ツキン１４が埋設されると共に、外モータケーシング６
ｂの上部に設けた冷却水通路１３に連通ずる冷却水路１
５が設けられている。１６は前記軸受プラタン）６ａ、
の内周部とラジアル軸受９ａとにより形成された静圧室
、１７は前記軸受プラタン）６ａ、に、軸方向に、かつ
前記冷却水通路１５と交差しないように任意数設けられ
た冷却水通路である。その他の構造は第１図に示す従来
例と同一であるから説明を省略する。A packing 14 is embedded in the bearing bracket 6a1 as shown in FIG. 3, and the outer motor casing 6
A cooling water passage 1 communicating with a cooling water passage 13 provided at the upper part of b.
5 is provided. 16 is the bearing platen) 6a,
An arbitrary number of cooling water passages are provided in the static pressure chamber 17 formed by the inner peripheral portion of the bearing platen 6a and the radial bearing 9a in the axial direction so as not to intersect with the cooling water passage 15. It is. The rest of the structure is the same as the conventional example shown in FIG. 1, so the explanation will be omitted.
次に上記のような構造からなる本実施例の作用について
説明する。Next, the operation of this embodiment having the above structure will be explained.
ポンプ（主インペラ１）が稼動しているとき、ポンプ軸
３ｂの下端に取付けられた補助インペラ兼用スラストデ
ィスク７も回転するため、冷却水はスラストディスク７
に設けられた冷却水通路７ａを流通し、かつ昇圧されて
モータ室底部１０ｂに流入する。この昇圧された冷却水
はさらに配管１１ｂ１熱交換器１２、配管１１ａ１外モ
ータケーシング６ｂの冷却水通路１３および軸受ブラケ
ット６ａ１の冷却水通路１５を経てラジアル軸受９ａの
静圧室１６に圧入される。When the pump (main impeller 1) is operating, the thrust disk 7 that also serves as an auxiliary impeller attached to the lower end of the pump shaft 3b also rotates, so the cooling water flows through the thrust disk 7.
The cooling water flows through a cooling water passage 7a provided in the cooling water passage 7a, is pressurized, and flows into the motor chamber bottom 10b. This pressurized cooling water is further press-fitted into the static pressure chamber 16 of the radial bearing 9a through the heat exchanger 12 of the piping 11b1, the cooling water passage 13 of the motor casing 6b outside the piping 11a1, and the cooling water passage 15 of the bearing bracket 6a1.
上記静圧室１６内に圧入された冷却水は、モータ軸３ｂ
に沿って上、下方向に分流し、この下方向に分流された
冷却水は、モータ回転子４とモータ固定子５を冷却した
後に、下部ラジアル軸受９ｂおよびスラストディスク７
０通路７ａを流通してモータ室底部１０ｂに戻入さｎ１
以降は前記と同様に循環作用を繰返す。一方、前記モー
タ軸３ｂに沿って上方向に分流された冷却水は、軸受プ
ラタン）６ａｔに設けた通路１７を流通して下降し、前
記の下方向に分流された冷却水と分流する。The cooling water press-filled into the static pressure chamber 16 is supplied to the motor shaft 3b.
After cooling the motor rotor 4 and the motor stator 5, the cooling water divided downward cools the motor rotor 4 and the motor stator 5, and then cools the lower radial bearing 9b and the thrust disk 7.
0 flows through the passage 7a and returns to the motor chamber bottom 10b n1
Thereafter, the circulation action is repeated in the same manner as above. On the other hand, the cooling water diverted upward along the motor shaft 3b flows down through a passage 17 provided in the bearing platen 6at, and separates from the cooling water diverted downward.
前記熱交換器１２の流路抵抗は、その他の冷却水循環の
流路抵抗に比べてはるかに小さいため、静圧室１６で発
生する静圧は十分であるので、ラジアル軸受９ａが摩耗
するのを防止することができる。Since the flow resistance of the heat exchanger 12 is much smaller than that of other cooling water circulation, the static pressure generated in the static pressure chamber 16 is sufficient to prevent the radial bearing 9a from wearing out. It can be prevented.
以上説明したように本発明によれば、補助インペラによ
シ昇圧された冷却水によシ、モータ室上部に設けた上部
ラジアル軸受に静圧軸受の機能を持たせることができる
ので、前記上部ラジアル軸受の摩耗を防止して寿命を延
長させるはかシでなく、サブマージプルポンプ軸系の固
有振動数を高度に維持して信頼性を向上させることがで
きる。As explained above, according to the present invention, the upper radial bearing provided in the upper part of the motor chamber can have the function of a static pressure bearing by using the cooling water pressurized by the auxiliary impeller. In addition to preventing the wear of the radial bearing and extending its life, it is also possible to maintain the natural frequency of the submerged pull pump shaft system at a high level and improve reliability.
第１図は従来のサブマージプルポンプの縦Ｆ！ｆｒ面図
、第２図は本発明の軸受装置の一実施例を適用したサブ
マージプルポンプの縦断面図、第３図および第４図はそ
れぞれ第２図のＣ，ＤｆＪの拡大詳細図である。
３ａ・・・ポンプ軸、３ｂ・・・モータ軸、６ａ、６ｂ
・・・内・外モータケーシング、６ａ、・・・軸受ブラ
ケット、７・・・補助インペラ兼用スラストディスク、
７ａ、１３．１５・・・冷却水通路、９ａ・・・上部ラ
ジアル軸受、１０ａ・・・モータ室上部、１ｏｂ・・・
モータ室底部。
第 ； 図
第３図
６α
第４図Figure 1 shows the vertical F! of a conventional submerged pull pump! 2 is a vertical sectional view of a submerged pull pump to which an embodiment of the bearing device of the present invention is applied, and FIGS. 3 and 4 are enlarged detailed views of C and DfJ in FIG. 2, respectively. . 3a...Pump shaft, 3b...Motor shaft, 6a, 6b
... Inner/outer motor casing, 6a, ... Bearing bracket, 7... Thrust disk that also serves as auxiliary impeller,
7a, 13.15...Cooling water passage, 9a...Upper radial bearing, 10a...Motor chamber upper part, 1ob...
Bottom of motor chamber. Figure 3 Figure 6α Figure 4
Claims (1)
ータ軸の上部を回転自在に支持する上部ラジアル軸受を
設け、そのモータ軸の下端に取付けた冷却水循環用補助
インペラ兼スラストディスクをモータ室底部に設けてな
るサブマージプルポンプにおいて、前記補助インベラ兼
スラストディスクに下向き方向の冷却水通路を設け、そ
の補助インペラによシ冷却水を前記冷却水通路および熱
交換器を経てモータ室上部に流入させて前記上部ラジア
ル軸受に圧入し、この上部ラジアル軸受に静圧軸受の機
能を持たせたことを特徴とするサブマージプルポンプの
軸受装置。 ２ 内モータケーシングの上部に設けた軸受ブラケット
に取付けられた上部ラジアル軸受の中間部に環状静圧室
を設け、この静圧室を前記軸受ブラケットおよび外モー
タケーシングにそれぞれ設けた冷却水通路および熱交換
器を介してモータ室底部に連通させたことを特徴とする
特許請求の範囲第１項記載のサブマージプルポンプの軸
受装置。[Claims] 1. An upper radial bearing is provided in the upper part of the motor chamber to rotatably support the upper part of the motor shaft which is integrally connected to the pump shaft, and an auxiliary cooling water circulation is attached to the lower end of the motor shaft. In a submerged pull pump having an impeller/thrust disk provided at the bottom of the motor chamber, the auxiliary impeller/thrust disk is provided with a downward cooling water passage, and the auxiliary impeller supplies cooling water to the cooling water passage and the heat exchanger. 1. A bearing device for a submerged pull pump, characterized in that the flow is caused to flow into an upper part of a motor chamber through the above, and is press-fitted into the upper radial bearing, so that the upper radial bearing has a function of a static pressure bearing. 2. An annular static pressure chamber is provided in the middle of the upper radial bearing attached to the bearing bracket provided at the upper part of the inner motor casing, and this static pressure chamber is connected to the cooling water passage and heat supply provided in the bearing bracket and the outer motor casing, respectively. The bearing device for a submerged pull pump according to claim 1, characterized in that the bearing device is connected to the bottom of the motor chamber via an exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21681682A JPS59108897A (en) | 1982-12-13 | 1982-12-13 | Bearing device of submergible pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21681682A JPS59108897A (en) | 1982-12-13 | 1982-12-13 | Bearing device of submergible pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59108897A true JPS59108897A (en) | 1984-06-23 |
| JPS6346279B2 JPS6346279B2 (en) | 1988-09-14 |
Family
ID=16694333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21681682A Granted JPS59108897A (en) | 1982-12-13 | 1982-12-13 | Bearing device of submergible pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59108897A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02137599U (en) * | 1989-04-21 | 1990-11-16 | ||
| US7785082B2 (en) | 2004-09-15 | 2010-08-31 | Mitsubishi Heavy Industries, Ltd | Sealless pump |
| JP2017089721A (en) * | 2015-11-06 | 2017-05-25 | トヨタ自動車株式会社 | Support structure of rotating shaft |
-
1982
- 1982-12-13 JP JP21681682A patent/JPS59108897A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02137599U (en) * | 1989-04-21 | 1990-11-16 | ||
| US7785082B2 (en) | 2004-09-15 | 2010-08-31 | Mitsubishi Heavy Industries, Ltd | Sealless pump |
| JP2017089721A (en) * | 2015-11-06 | 2017-05-25 | トヨタ自動車株式会社 | Support structure of rotating shaft |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6346279B2 (en) | 1988-09-14 |
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