JPH0533753Y2 - - Google Patents
Info
- Publication number
- JPH0533753Y2 JPH0533753Y2 JP1986172180U JP17218086U JPH0533753Y2 JP H0533753 Y2 JPH0533753 Y2 JP H0533753Y2 JP 1986172180 U JP1986172180 U JP 1986172180U JP 17218086 U JP17218086 U JP 17218086U JP H0533753 Y2 JPH0533753 Y2 JP H0533753Y2
- Authority
- JP
- Japan
- Prior art keywords
- fluid
- motor
- filter
- flow path
- fluid flow
- 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
- 239000012530 fluid Substances 0.000 claims description 53
- 230000035515 penetration Effects 0.000 claims description 3
- 238000001816 cooling Methods 0.000 description 11
- 238000005461 lubrication Methods 0.000 description 8
- 230000001050 lubricating effect Effects 0.000 description 5
- 230000003068 static effect Effects 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 239000000463 material Substances 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]
この考案は、流体を圧送するとともに、圧送す
る流体の一部を電動機側に導いて電動機の冷却お
よび軸受の潤滑を行なう電動ポンプ、特に電動機
の冷却および軸受の潤滑を行なう構造の改良に関
するものである。[Detailed description of the invention] [Industrial application field] This invention is applicable to an electric pump that pumps fluid and guides a part of the pumped fluid to the motor side to cool the motor and lubricate the bearings, especially for electric motors. This invention relates to improvements in the structure for cooling the bearings and lubricating the bearings.
[従来の技術]
第2図は従来の電動ポンプを示す断面図であ
り、図において1は内部にポンプ室2と電動機室
3と流体の流路4とを設けた電動ポンプのハウジ
ング、5はステータ6とロータ7とから成る電動
機によつて回転駆動されるほぼ垂直なるシヤフト
で、その先端は上記ポンプ室2内に突出してい
る。8および9は上記シヤフト5の径方向を支持
するスリーブベアリングで、それぞれ軸方向に溝
部10および11を有している。12および13
は上記シヤフト5の軸方向を支持するスラストベ
アリングで、それぞれ径方向に溝部14および1
5を有している。16はスラストワツシヤで、上
記スラストベアリング13により支持されてい
る。17は複数枚の螺旋状の羽根18を有するイ
ンペラである。19はキー、20はナツトで、上
記インペラ17は、キー19およびナツト20で
上記シヤフト5の下垂端に固定され、シヤフト5
と一体となつて回転する。21は上記スリーブベ
アリング8を保持するブラケツトで、流体の通路
22を有し、この通路22とスリーブベアリング
8上部の空間部23とを連通する貫通孔24を有
している。25は配管(図示せず)に連結する吐
出口26を有するフイツテイングで、上記ブラケ
ツト21と共に上記ハウジング1にスクリユウ2
7により固定されている。28は上記ステータ6
とロータ7との空隙部である。29は上記ハウジ
ング1の空洞部で、上記インペラ17の背面部3
0と連通している。31は上記ハウジング1の連
通穴で、上記空洞部29とタンク32内とを連通
している。33は上記タンク32内の流体であ
る。[Prior Art] Fig. 2 is a cross-sectional view showing a conventional electric pump. In the figure, 1 is a housing of the electric pump, which has a pump chamber 2, a motor chamber 3, and a fluid passage 4 inside, and 5 is a housing of the electric pump. It is a substantially vertical shaft rotatably driven by an electric motor consisting of a stator 6 and a rotor 7, and its tip protrudes into the pump chamber 2. Sleeve bearings 8 and 9 support the shaft 5 in the radial direction, and have grooves 10 and 11 in the axial direction, respectively. 12 and 13
is a thrust bearing that supports the shaft 5 in the axial direction, and has grooves 14 and 1 in the radial direction, respectively.
5. A thrust washer 16 is supported by the thrust bearing 13 mentioned above. 17 is an impeller having a plurality of spiral blades 18. 19 is a key, 20 is a nut, the impeller 17 is fixed to the hanging end of the shaft 5 with the key 19 and the nut 20;
It rotates as one. A bracket 21 holds the sleeve bearing 8, and has a fluid passage 22 and a through hole 24 communicating the passage 22 with a space 23 above the sleeve bearing 8. Reference numeral 25 denotes a fitting having a discharge port 26 connected to a pipe (not shown), which is attached to the housing 1 with the screw 2 together with the bracket 21.
It is fixed by 7. 28 is the stator 6
This is the gap between the rotor 7 and the rotor 7. 29 is a hollow part of the housing 1, and a rear part 3 of the impeller 17.
It communicates with 0. Reference numeral 31 denotes a communication hole in the housing 1, which communicates the cavity 29 with the inside of the tank 32. 33 is the fluid in the tank 32.
従来の電動ポンプは上記のように構成され、外
部電源入力により電動機室3内の電動機が駆動さ
れると、スリーブベアリング8および9とスラス
トベアリング12および13とによつて支持され
たシヤフト5と共にインペラ17が所定方向に高
速で回転する。このインペラ17の回転によりタ
ンク32内の流体33が太線の矢印で示す如く、
ポンプ室2、ハウジング1内の流路4、更にはブ
ラケツト21の通路22を通り、フイツテイング
25の吐出口26から配管(図示せず)へ向けて
圧送される。この時、流体33の一部が細線の矢
印で示す如く、ブラケツト21の貫通穴24、空
間部23、スリーブベアリング8の溝部10を通
り、更にはステータ6とロータ7との空隙部2
8、そしてスラストベアリング12の溝部14、
スリーブベアリング9の溝部11、スラストベア
リング13の溝部15を通つてインペラ17の背
面部30に至る。こうしてインペラ17の背面部
30に至つた流体33はハウジング1の空洞部2
9および連通穴31からタンク32内へ戻る。こ
のように流体33の一部が上記経路を循環するこ
とによつて軸受部の潤滑並びに電動機の冷却を行
なう。 The conventional electric pump is configured as described above, and when the electric motor in the motor chamber 3 is driven by an external power input, the impeller is moved together with the shaft 5 supported by the sleeve bearings 8 and 9 and the thrust bearings 12 and 13. 17 rotates at high speed in a predetermined direction. Due to the rotation of the impeller 17, the fluid 33 in the tank 32 flows as shown by the thick arrow.
It passes through the pump chamber 2, the channel 4 in the housing 1, and further through the passage 22 of the bracket 21, and is pumped out from the outlet 26 of the fitting 25 toward a pipe (not shown). At this time, a part of the fluid 33 passes through the through hole 24 of the bracket 21, the space 23, and the groove 10 of the sleeve bearing 8, as shown by the thin arrow, and further passes through the gap 2 between the stator 6 and rotor 7.
8, and the groove portion 14 of the thrust bearing 12,
It passes through the groove 11 of the sleeve bearing 9 and the groove 15 of the thrust bearing 13 to reach the back surface 30 of the impeller 17. The fluid 33 that has reached the back surface 30 of the impeller 17 in this way is transferred to the cavity 2 of the housing 1.
9 and the communication hole 31 to return into the tank 32. By thus circulating a portion of the fluid 33 through the above-mentioned path, the bearing portion is lubricated and the electric motor is cooled.
[考案が解決しようとする問題点]
従来の電動ポンプは以上のように構成されてい
るので、流量が多くなり流体の静圧が低くなると
ブラケツトの貫通孔から入り込む流体も少なくな
り潤滑並びに冷却の能力が低下してしまい、また
流体中のゴミ等の異物がブラケツトの貫通孔に詰
まつて流体が循環しなくなつたりして、軸受部の
潤滑不良や電動機の過熱が起こるなどの問題点が
あつた。[Problems that the invention aims to solve] Conventional electric pumps are constructed as described above, so when the flow rate increases and the static pressure of the fluid decreases, the amount of fluid that enters through the through holes of the bracket decreases, which improves lubrication and cooling. In addition, foreign matter such as dirt in the fluid may clog the through hole of the bracket, making it impossible for the fluid to circulate, causing problems such as poor lubrication of the bearings and overheating of the motor. It was hot.
そこで、この考案は、流量が変化した場合で
も、潤滑及び冷却の能力を十分に維持できるとと
もに、喩え、流体中のゴミ等の異物が吸込まれた
場合でも、目詰まりを起こし難い潤滑及び冷却経
路を保持できる電動ポンプの提供を課題とするも
のである。 Therefore, this idea was designed to maintain sufficient lubrication and cooling ability even when the flow rate changes, and to prevent clogging of the lubrication and cooling paths even if foreign matter such as dust is sucked into the fluid. The objective is to provide an electric pump that can maintain the
[問題点を解決するための手段]
この考案に係る電動ポンプは、電動機および電
動機で駆動されるインペラを内蔵するポンプ本体
に、流体の吸込口から吐出口に至る流体流路を設
け、前記インペラの回転により流体流路を通して
流体を圧送するとともに、前記流体流路を流れる
流体の一部を電動機側に導いて電動機の冷却およ
び軸受の潤滑を行なう電動ポンプにおいて、前記
電動機の冷却および軸受の潤滑を行なう流体の導
入は、前記流体流路の通路に対して、内部が通路
に連通し外周面に多数の貫通部を有し、周面に多
数の小孔が穿設され、かつ、流体の流れ方向に対
しほぼ直角に中空状のフイルタを配設したもので
ある。[Means for Solving the Problems] The electric pump according to the present invention includes a pump body that includes an electric motor and an impeller driven by the electric motor, and is provided with a fluid flow path from a fluid suction port to a discharge port, and the impeller In an electric pump that pumps fluid through a fluid channel by rotation of the motor and guides a part of the fluid flowing through the fluid channel to the motor side to cool the motor and lubricate the bearing, the motor is cooled and the bearing is lubricated. In order to introduce the fluid to the passage of the fluid flow path, the inside thereof communicates with the passage, the outer circumferential surface has a large number of penetration parts, and the circumferential surface has a large number of small holes. A hollow filter is arranged approximately perpendicular to the flow direction.
[作用]
この考案においては、電動機の冷却および軸受
の潤滑を行なう流体の導入は、流体流路の通路に
対して、内部が通路に連通し外周面に多数の貫通
部を有し、円筒材の周面に多数の小孔が穿設さ
れ、かつ流体の流れ方向に対しほぼ直角に中空状
のフイルタを配設したものであるから、フイルタ
に穿設された多数の小孔から動圧を導入し、電動
機の冷却および軸受の潤滑を行なう流体として使
用できる。[Function] In this invention, the fluid for cooling the electric motor and lubricating the bearings is introduced through a cylindrical material whose inside is connected to the passage and has a large number of penetrations on the outer circumferential surface. Many small holes are drilled on the circumferential surface of the filter, and a hollow filter is arranged almost perpendicularly to the direction of fluid flow. It can be used as a fluid to cool motors and lubricate bearings.
[実施例]
第1図はこの考案の一実施例を示す電動ポンプ
の断面図であり、図中、第2図と同一符号は同一
又は相当部分を示す。34はブラケツト21の通
路22を貫通し、流路に対してほぼ直角に対向し
てブラケツト21に挿着された中空円筒状のフイ
ルタで、径方向に多数の貫通部、例えばこの実施
例では貫通孔35を有している。36は上記フイ
ルタ34の中空部で、この中空部36は、ブラケ
ツト21の貫通孔24と連通している。[Embodiment] FIG. 1 is a sectional view of an electric pump showing an embodiment of this invention, and in the figure, the same reference numerals as in FIG. 2 indicate the same or corresponding parts. Reference numeral 34 denotes a hollow cylindrical filter that passes through the passage 22 of the bracket 21 and is inserted into the bracket 21 so as to face the flow path at a substantially right angle. It has a hole 35. 36 is a hollow portion of the filter 34, and this hollow portion 36 communicates with the through hole 24 of the bracket 21.
上記のように構成された電動ポンプにおいて
は、外部電源入力により電動機室3内の電動機が
駆動されると、スリーブベアリング8および9と
スラストベアリング12および13とによつて支
持されたシヤフト5と共にインペラ17が所定方
向に高速で回転する。このインペラ17の回転に
より、タンク32内の流体33が太線の矢印で示
す如く、ポンプ室2、ハウジング1内の流路4、
更にはブラケツト21の通路22を通りフイツテ
イング25の吐出口26から配管(図示せず)へ
向けて圧送される。流体33がブラケツト21の
通路22を通過する時、フイルタ34がこの通路
22を貫通し、流れの方向に対してほぼ直角に対
向してブラケツト21に装着されているため、フ
イルタ34には、流体33の静圧に加えて動圧が
作用することになる。このことにより、流量が多
くなり流体の静圧が低下した場合でも、その分、
動圧が増加するので、高圧の流体33がフイルタ
34の円周方向に多数設けられた貫通孔35から
フイルタの中空部36に流入し、その後流体33
が細線の矢印で示す如く、ブラケツト21の貫通
孔24→空間部23→スリーブベアリング8の溝
部10→ステータ6とロータ7との空隙部28→
スラストベアリング12の溝部14→スリーブベ
アリング13の溝部15→インペラ17の背面部
30→ハウジング1の空隙部29→連通穴31を
通り、タンク32内へ戻るため軸受部の潤滑並び
に電動機の冷却が確実にできる。 In the electric pump configured as described above, when the electric motor in the motor chamber 3 is driven by an external power input, the impeller is moved together with the shaft 5 supported by the sleeve bearings 8 and 9 and the thrust bearings 12 and 13. 17 rotates at high speed in a predetermined direction. Due to this rotation of the impeller 17, the fluid 33 in the tank 32 flows through the pump chamber 2, the flow path 4 in the housing 1, and
Furthermore, it passes through the passage 22 of the bracket 21 and is fed under pressure from the outlet 26 of the fitting 25 toward a pipe (not shown). When the fluid 33 passes through the passage 22 of the bracket 21, the filter 34 passes through the passage 22 and is mounted on the bracket 21 facing substantially perpendicular to the direction of flow. In addition to the static pressure of 33, dynamic pressure will act. As a result, even if the flow rate increases and the static pressure of the fluid decreases, the
As the dynamic pressure increases, the high-pressure fluid 33 flows into the hollow part 36 of the filter through the through holes 35 provided in a large number in the circumferential direction of the filter 34, and then the fluid 33 flows into the hollow part 36 of the filter.
As shown by the thin arrow, the through hole 24 of the bracket 21 → the space 23 → the groove 10 of the sleeve bearing 8 → the gap 28 between the stator 6 and the rotor 7 →
The groove 14 of the thrust bearing 12 → the groove 15 of the sleeve bearing 13 → the back surface 30 of the impeller 17 → the cavity 29 of the housing 1 → it passes through the communication hole 31 and returns to the tank 32, ensuring lubrication of the bearing and cooling of the motor. Can be done.
また、流体中のゴミ等の異物が吸込まれた場合
にもフイルタ34に多数の貫通孔35が設けてあ
るため、この貫通孔35の一部に目詰まりの可能
性があつても全部が目詰まりする可能性はほとん
どないので高圧の流体33がフイルタ34の中空
部36に流入し、その後、上述の如くの経路にて
流体33が循環することにより軸受部の潤滑並び
に電動機の冷却効果が損なわれることがない。 Furthermore, even if foreign matter such as dust is sucked into the fluid, the filter 34 is provided with a large number of through holes 35, so even if some of the through holes 35 may be clogged, all of them will be clogged. Since there is almost no possibility of clogging, the high-pressure fluid 33 flows into the hollow part 36 of the filter 34, and thereafter, the fluid 33 circulates through the above-mentioned path, thereby impairing the lubrication of the bearing and the cooling effect of the motor. It never happens.
なお、上記実施例では、タンク中に浸漬された
電動ポンプについて説明したが、配管の途中に取
り付けられる各種のポンプ装置であつてもよく、
上記実施例と同様の効果を奏する。 In addition, in the above embodiment, an electric pump immersed in a tank was described, but various pump devices installed in the middle of piping may be used.
The same effects as in the above embodiment are achieved.
また上記実施例では、フイルタ34が、周面に
多数の貫通孔35を有する円筒状をなしており、
しかも流路に対しほぼ直角に配されている場合を
示したが、多角形等の他の筒状をなしているフイ
ルタでも、また球形等の他の中空状をなしている
フイルタでもよい。また、フイルタを流体の流れ
方向に対しほぼ直角に配設しているから、流体流
量の多少の減少があつても、フイルタに穿設され
た多数の小孔から直接動圧を導入し、電動機の冷
却および軸受の潤滑を行なう流体として使用で
き、かつ、流体中のゴミによつてフイルタに穿設
された小孔の一部が目詰りしても、その分だけ、
フイルタの上流の静圧が高くなり、結果的に、電
動機の冷却および軸受の潤滑を行なう流体量を減
少させることがない。 Further, in the above embodiment, the filter 34 has a cylindrical shape with a large number of through holes 35 on the circumferential surface,
Moreover, although the case where the filter is disposed approximately perpendicular to the flow path is shown, the filter may have another cylindrical shape such as a polygon, or may have another hollow shape such as a spherical shape. In addition, since the filter is arranged almost perpendicular to the fluid flow direction, even if the fluid flow rate decreases to some extent, dynamic pressure can be directly introduced through the many small holes drilled in the filter, and the electric motor It can be used as a fluid for cooling the bearings and lubricating the bearings, and even if some of the small holes in the filter become clogged with dirt in the fluid,
The static pressure upstream of the filter is increased and, as a result, the amount of fluid for cooling the motor and lubricating the bearings is not reduced.
[考案の効果]
以上説明したとおり、この考案の電動ポンプ
は、電動機の冷却および軸受の潤滑を行なう流体
の導入を、流体流路の通路に対して、内部が通路
に連通し外周面に多数の貫通部を有し、周面に多
数の小孔が穿設され、かつ流体の流れ方向に対し
ほぼ直角に中空状のフイルタを配設して行なつて
おり、フイルタに穿設された多数の小孔から動圧
を導入し、電動機の冷却および軸受の潤滑を行な
う流体として使用できる。また、流体中のゴミに
よつてフイルタに穿設された小孔の一部が目詰り
しても、その分だけ、フイルタの上流の静圧が高
くなり、結果的に、電動機の冷却および軸受の潤
滑を行なう流体量を減少させることがない。この
ため、軸受部の潤滑不良や電動機の過熱を確実に
防止できる。[Effects of the invention] As explained above, the electric pump of this invention introduces the fluid for cooling the motor and lubricating the bearings. This is achieved by having a hollow filter with a large number of small holes perforated on its circumferential surface, and arranged almost perpendicularly to the direction of fluid flow. Dynamic pressure is introduced through the small holes in the fluid and can be used as a fluid to cool the motor and lubricate the bearings. Furthermore, even if some of the small holes drilled in the filter become clogged with dirt in the fluid, the static pressure upstream of the filter increases by that amount, resulting in cooling of the motor and bearings. without reducing the amount of fluid used for lubrication. Therefore, poor lubrication of the bearing and overheating of the electric motor can be reliably prevented.
第1図はこの考案の一実施例を示す電動ポンプ
の断面図、第2図は従来の電動ポンプを示す第1
図相当図である。
図において、1はハウジング、3は電動機室、
4は流路、8,9はスリーブベアリング、12,
13はスラストベアリング、17はインペラ、2
1はブラケツト、22は通路、24,35は貫通
孔、26は吐出口、32はタンク、34はフイル
タ、36は中空部。なお、各図中同一符号は同一
または相当部分を示す。
Figure 1 is a sectional view of an electric pump showing an embodiment of this invention, and Figure 2 is a cross-sectional view of a conventional electric pump.
It is a figure equivalent figure. In the figure, 1 is a housing, 3 is a motor room,
4 is a flow path, 8 and 9 are sleeve bearings, 12,
13 is a thrust bearing, 17 is an impeller, 2
1 is a bracket, 22 is a passage, 24 and 35 are through holes, 26 is a discharge port, 32 is a tank, 34 is a filter, and 36 is a hollow portion. Note that the same reference numerals in each figure indicate the same or corresponding parts.
Claims (1)
を内蔵するポンプ本体に、流体の吸込口から吐出
口に至る流体流路を設け、前記インペラの回転に
より流体流路を通して流体を圧送するとともに、
前記流体流路を流れる流体の一部を電動機側に導
いて電動機の冷却および軸受の潤滑を行なう電動
ポンプにおいて、 前記電動機の冷却および軸受の潤滑を行なう流
体の導入は、前記流体流路の通路に対して、内部
が通路に連通し外周面に多数の貫通部を有し、周
面に多数の小孔が穿設され、かつ、流体の流れ方
向に対しほぼ直角に中空状のフイルタを配設して
なることを特徴とする電動ポンプ。[Claims for Utility Model Registration] A pump body incorporating an electric motor and an impeller driven by the electric motor is provided with a fluid flow path from a fluid suction port to a discharge port, and fluid is pumped through the fluid flow path by rotation of the impeller. Along with pressure-feeding,
In an electric pump that cools the motor and lubricates the bearing by guiding a part of the fluid flowing through the fluid flow path to the motor side, the fluid that cools the motor and lubricates the bearing is introduced through the passage of the fluid flow path. On the other hand, the inside of the filter communicates with the passage, has a large number of penetration parts on the outer circumferential surface, has a large number of small holes in the circumferential surface, and has a hollow filter arranged almost perpendicular to the fluid flow direction. An electric pump characterized by:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1986172180U JPH0533753Y2 (en) | 1986-11-10 | 1986-11-10 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1986172180U JPH0533753Y2 (en) | 1986-11-10 | 1986-11-10 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6378187U JPS6378187U (en) | 1988-05-24 |
JPH0533753Y2 true JPH0533753Y2 (en) | 1993-08-26 |
Family
ID=31108489
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1986172180U Expired - Lifetime JPH0533753Y2 (en) | 1986-11-10 | 1986-11-10 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0533753Y2 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4947201U (en) * | 1972-07-26 | 1974-04-25 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5745420Y2 (en) * | 1974-10-24 | 1982-10-06 |
-
1986
- 1986-11-10 JP JP1986172180U patent/JPH0533753Y2/ja not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4947201U (en) * | 1972-07-26 | 1974-04-25 |
Also Published As
Publication number | Publication date |
---|---|
JPS6378187U (en) | 1988-05-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6863493B2 (en) | Lubricating systems for regenerative vacuum pumps | |
SE9703054L (en) | Oil-free screw rotor machine, the bearings of which are lubricated with an aqueous liquid | |
EP0573063A1 (en) | Bearing lubricating structure for rotary machinery | |
JP3471071B2 (en) | Bearing lubrication system for rotating machinery | |
US5150769A (en) | Controlled-flow lubricating system | |
US5051007A (en) | Lubrication of a centrifugal pump bearing | |
EP0121053A1 (en) | Axial thrust reducing device for pumps | |
EP0835400B1 (en) | Seal/bearing apparatus | |
JPH0533753Y2 (en) | ||
CN1022504C (en) | Integrated centrifugal pump and motor | |
JPH056037B2 (en) | ||
EP1267083A3 (en) | Lubrification system for rotating machines and pumps | |
US6854955B2 (en) | Internal lubrication screw pump for hollow shaft | |
GB1071266A (en) | Liquid-moving unit comprising a centrifugal pump and an electric driving motor therefor | |
JPH11294358A (en) | Double shaft vacuum pump | |
US2957423A (en) | Pumps | |
JP2002303297A (en) | Horizontal shaft type pump | |
EP0796410B1 (en) | Vertical bearing assembly lubrication | |
JPS6339797B2 (en) | ||
CN218542954U (en) | Bearing cooling device of high-speed motor and high-speed motor | |
RU2755500C1 (en) | Turbocharger | |
KR102581492B1 (en) | hydrostatic bearing spindle | |
JPH0467045B2 (en) | ||
JPH0749038Y2 (en) | Canned motor pump | |
JPH064074Y2 (en) | Foreign motor resistant motor pump |