JP2738814B2 - Liquid cooling device for rotor of rotating electric machine - Google Patents
Liquid cooling device for rotor of rotating electric machineInfo
- Publication number
- JP2738814B2 JP2738814B2 JP5341928A JP34192893A JP2738814B2 JP 2738814 B2 JP2738814 B2 JP 2738814B2 JP 5341928 A JP5341928 A JP 5341928A JP 34192893 A JP34192893 A JP 34192893A JP 2738814 B2 JP2738814 B2 JP 2738814B2
- Authority
- JP
- Japan
- Prior art keywords
- coolant
- outer cover
- hollow shaft
- liquid
- box
- 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
- Motor Or Generator Cooling System (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、液体冷却方式の全閉形
回転電機における回転子の液冷却装置に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid cooling device for a rotor in a liquid-cooled fully-closed rotary electric machine.
【０００２】[0002]
【従来の技術】図３は従来の液体冷却方式の全閉形回転
電機における回転子の液冷却装置の部分拡大図であり、
図３において、１は軸受、２は軸受ハウジング、３は外
カバー、３ｃは軸受１の潤滑グリースの漏れを防止する
ために設けられた油切り溝部、９は冷却液蓋である。従
来の液冷却装置による回転子４の冷却方法は、冷却液蓋
内に冷却液を流入させ、回転子を装着してなる中空軸内
部に吐出させ、冷却液蓋９と外カバー３の内部空間Ｄに
排出された冷却液を外カバー３の下側に設けられた排液
口３ａから排出させていた。 2. Description of the Related Art FIG. 3 is a partially enlarged view of a liquid cooling device for a rotor in a conventional liquid-cooled fully-closed rotary electric machine.
3, 1 bearing, 2 bearing housing 3 is an outer cover, 3c are oil thrower groove provided to prevent leakage of lubricating grease of the bearing 1, 9 Ru coolant lid der. The cooling method of the rotor 4 by the conventional liquid cooling device includes a cooling liquid lid.
Coolant flows into the inside of the hollow shaft with the rotor mounted
To the cooling liquid lid 9 and the inner space D of the outer cover 3.
The discharged coolant is drained on the lower side of the outer cover 3.
It was discharged from the mouth 3a.
【０００３】１０は中空軸５の外周に設けられたオイル
シールで、このオイルシールは回転子４を冷却した液体
が軸受１やさらに回転電機の内部Ｃに漏れて浸入するの
を防ぐために複数個軸方向に設けられている。１１はオ
イルシール１０の取付金具、１２はオイルシール１０の
押え板で、オイルシール１０が飛び出さないように、取
付金具１１を介して外カバー３に取着されている。[0003] Reference numeral 10 denotes an oil seal provided on the outer periphery of the hollow shaft 5. It is provided in the axial direction. Reference numeral 11 denotes a mounting bracket for the oil seal 10, and reference numeral 12 denotes a holding plate for the oil seal 10, which is attached to the outer cover 3 via the mounting bracket 11 so that the oil seal 10 does not protrude.
【０００４】[0004]
【発明が解決しようとする課題】上記構成の液体冷却方
式の全閉形回転電機において、図３に示すように冷却液
蓋９に入液パイプ９ａを装着して中空回転軸内に挿入
し、入液口９ａから冷却液を流入させて回転子４を装着
した中空軸５の中心部分に設けられた所定長さの穴に吐
出させ、中空軸の内周と入液パイプ９ａの外周との間隙
を逆流した冷却液を冷却液蓋９と外カバー３の内部空間
Ｄを介して外カバー３の下側に設けられた排液口３ａか
ら排出させることにより、回転子４の冷却を行うことが
試みられた。 このような構成において、回転電機のパワ
ーアップ化を図ろうとすると、回転電機のロス分も増大
し、このため回転子および固定子の温度上昇が高くな
る。このような温度上昇を高くせずに適正に抑え込むに
は、回転電機のパワーアップ化に伴って回転子と固定子
の冷却液の流量を増大させる必要がある。回転子の冷却
液量を増大させると、この冷却液がオイルシールのシー
ル部分から漏れて外カバーの油切り溝部や軸受やさらに
は回転電機内部にまで浸入し、さまざまな不都合を発生
させてしまう。SUMMARY OF THE INVENTION A liquid cooling method of the above construction
In the fully-closed rotary electric machine of the formula, as shown in FIG.
Attach the liquid inlet pipe 9a to the lid 9 and insert it into the hollow rotary shaft
Then, the cooling liquid flows in from the liquid inlet 9a and the rotor 4 is mounted.
Into a hole of a predetermined length provided in the center of the hollow shaft 5
And the gap between the inner circumference of the hollow shaft and the outer circumference of the liquid inlet pipe 9a.
The cooling liquid flowing backward is cooled by the cooling liquid lid 9 and the inner space of the outer cover 3.
D is a drain port 3a provided on the lower side of the outer cover 3 via D
To cool the rotor 4
Attempted. In such a configuration, when it is intended to power-up of the rotating electric machine, also it increases loss in the rotary electric machine, and thus the temperature rise of the rotor your good beauty stator increases. In order to appropriately suppress such a temperature rise without increasing the temperature, it is necessary to increase the flow rate of the cooling liquid for the rotor and the stator with the power-up of the rotating electric machine. When the amount of cooling liquid of the rotor is increased, the cooling liquid leaks from the sealing portion of the oil seal and penetrates into the oil cut groove of the outer cover, the bearing, and even the inside of the rotating electric machine, causing various inconveniences. .
【０００５】また、回転電機の高速化を図ろうとする
と、回転子を装着している中空軸の周速が大きくなり、
このため有機高分子材料から形成されているオイルシー
ルのシール部の磨耗量が大きくなり、オイルシールの短
寿命化につながる。本発明は上述した点に鑑みて創案さ
れたもので、その目的とするところは、パワーアップ化
や高速化しても、冷却液の漏れが軸受や回転電機の内部
に浸入することのない長寿命の回転子の液冷却装置を提
供することにある。In order to increase the speed of the rotating electric machine, the peripheral speed of the hollow shaft on which the rotor is mounted increases.
For this reason, the amount of wear of the seal portion of the oil seal formed of the organic polymer material increases, which leads to shortening of the life of the oil seal. SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has as its object the long service life in which the leakage of the coolant does not enter the inside of the bearing or the rotating electric machine even if the power is increased or the speed is increased. And a liquid cooling device for the rotor.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するた
め、本発明においては、回転電機の反伝動側の軸受ハウ
ジングの外カバーよりさらに外側の位置に冷却液箱を設
け、該冷却液箱の一端面を上記外カバーの外側端面と係
合させて密閉化し、上記冷却液箱に、冷却液を排出する
ための排液口を設けるとともに、回転子を装着した中空
軸の穴の中に挿入される所定長さの入液パイプを取り付
ける。 そして、上記入液パイプの一端から流入した冷却
液を、上記入液パイプを介して上記中空軸内に流入さ
せ、中空軸内周と上記入液パイプ外周間の間隙を介して
冷却液箱に戻し、戻ってきた冷却液を上記冷却液箱に設
けられた排液口から排出させることにより、回転子を冷
却する。Means for Solving the Problems To achieve the above object,
Therefore, in the present invention, the bearing
Install a coolant box further outside the jing outer cover.
And one end face of the coolant box is connected to the outer end face of the outer cover.
And drain the coolant into the coolant box above
And a hollow with a rotor attached
Attach a specified length of liquid inlet pipe to be inserted into the shaft hole
I can. And the cooling that has flowed in from one end of the liquid inlet pipe
The liquid is introduced into the hollow shaft through the liquid inlet pipe.
Through the gap between the inner circumference of the hollow shaft and the outer circumference of the liquid inlet pipe.
Return the coolant to the coolant box and place the returned coolant in the coolant box.
The rotor is cooled by draining through the drain
Reject .
【０００７】また、上記外カバーの外側端面に取り付け
られた取付金具にメカニカルシール・ユニットのスラス
ト方向摺動リングを装着し、また、上記中空軸を冷却液
箱内の所定位置まで延伸し、該延伸された中空軸に取り
付けられた取付金具にメカニカルシールユニットの回転
リングを装着し、上記メカニカルシール・ユニットによ
り、冷却液箱内の冷却液が回転電機内部に浸入するのを
防止するとともに、上記外カバーに漏液溜め部を設け、
上記メカニカルシール・ユニットから漏れ、中空軸の外
周と外カバーの間を通って回転電機内部に浸入しようと
する冷却液を溜めて外部に排出させる。 The outer cover is attached to the outer end face of the outer cover.
The thrust of the mechanical seal unit is attached to the mounting bracket
A sliding ring in the direction of
It is stretched to a predetermined position in the box, and set on the stretched hollow shaft.
Rotation of the mechanical seal unit on the attached mounting bracket
Attach the ring and use the mechanical seal unit
To prevent the coolant in the coolant box from entering the rotating electrical machine.
In addition to providing a leak reservoir on the outer cover,
Leakage from the mechanical seal unit, outside the hollow shaft
Trying to penetrate into the rotating electrical machine through between the circumference and the outer cover
The cooling liquid to be collected is discharged to the outside.
【０００８】[0008]
【作用】その作用は、次に述べる実施例で併せて説明す
る。以下、本発明の一実施例を図面に基づいて詳述す
る。The operation will be described in the following embodiments. Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
【０００９】[0009]
【実施例】図１は本発明の一実施例を示す液体冷却方式
の全閉形回転電機の一部切断の断面図、図２は図１の回
転子の液冷却装置の部分拡大断面図である。図１及び図
２において、１は軸受、２は軸受ハウジング、３は外カ
バー、３ｃは軸受１の潤滑グリースの漏れを防止するた
めに設けられた油切り溝部、６は冷却液箱で、この冷却
液箱６には所定長さの入液パイプ６ａと排液口６ｂが取
着されている。1 is a cross-sectional view of a liquid-cooled fully-closed rotary electric machine according to an embodiment of the present invention, partially cut away, and FIG. 2 is a partially enlarged cross-sectional view of a liquid cooling device for a rotor of FIG. . 1 and 2, 1 is a bearing, 2 is a bearing housing, 3 is an outer cover, 3c is an oil cut groove provided to prevent leakage of lubricating grease of the bearing 1, and 6 is a coolant box. The cooling liquid box 6 is provided with a liquid inlet pipe 6a and a liquid discharge port 6b of a predetermined length.
【００１０】[0010]
【実施例】本発明の液冷却装置による回転子４の冷却方
法は、まず冷却液箱６に取着された入液パイプ６ａの入
液口６ｃから冷却液を流入し、回転子４を装着して成る
中空軸５の中心部分に設けられた所定長さの穴５ａに吐
出させる。この穴５ａに吐出された冷却液は、穴の端面
５ｂではね返って中空軸の穴５ａと入液パイプ６ａの外
周と隙間５ｃを逆流し、穴の開口部５ｄから冷却液箱６
の内部空間Ａに排出される。この内部空間Ａに排出され
た冷却液は、冷却液箱６に設けられた排液口６ｂから流
出される。上記のような冷却液の循環により、回転子４
の冷却を行う。７はメカニカルシール・ユニットで、こ
のユニットのスラスト方向摺動リング７ｂは取付金具７
ａに装着され、この取付金具７ａは外カバー３の外側端
面３ｄに取着されている。一方メカニカルシール・ユニ
ット７の回転リング７ｃは取付金具７ｄに装着され、こ
の取付金具７ｄは冷却液箱６の内部空間Ａの所定位置ま
で伸延した中空軸５の外周に取着され、上記スラスト方
向摺動リング７ｂと回転リング７ｃの接触シール面Ｂで
冷却液のシールを行い、冷却液の漏れを防止する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the method of cooling a rotor 4 by a liquid cooling apparatus according to the present invention, first, a cooling liquid flows into a liquid inlet 6c of a liquid inlet pipe 6a attached to a cooling liquid box 6, and the rotor 4 is mounted. The liquid is discharged into a hole 5a of a predetermined length provided in the center portion of the hollow shaft 5 thus formed. The coolant discharged into the hole 5a rebounds at the end face 5b of the hole, flows backward through the hole 5a of the hollow shaft and the outer periphery of the liquid inlet pipe 6a and the gap 5c, and flows from the opening 5d of the hole into the coolant box 6c.
Is discharged to the internal space A. The coolant discharged into the internal space A flows out from a drain port 6b provided in the coolant box 6. Due to the circulation of the cooling liquid as described above, the rotor 4
To cool down. Reference numeral 7 denotes a mechanical seal unit, and a thrust-direction sliding ring 7b of this unit includes a mounting bracket 7
The mounting bracket 7a is attached to the outer end face 3d of the outer cover 3. On the other hand, the rotating ring 7c of the mechanical seal unit 7 is mounted on a mounting bracket 7d, which is mounted on the outer periphery of the hollow shaft 5 extending to a predetermined position in the internal space A of the cooling liquid box 6 and in the thrust direction. The coolant is sealed at the contact seal surface B between the sliding ring 7b and the rotating ring 7c to prevent the coolant from leaking.
【００１１】また、上記接触シール面Ｂから漏れたわず
かな冷却液に対しては、外カバー３の所定位置に漏液溜
め部３ａを設け、この漏液溜め部３ａと導通するドレン
穴３ｂから排液させる。かような構成においては、接触
シール面Ｂから漏れた冷却液は、外カバー３の油切り溝
部３ｃや軸受１やさらには回転電機の内部Ｃにまで浸入
することが全く無くなる。さらに、上記のメカニカルシ
ール・ユニット７のスラスト方向摺動リング７ｂと回転
リング７ｃの材料は耐磨耗性の優れた無機材料を使用し
ているため磨耗量が極めて少なく、長寿命化が可能とな
る。なお、メカニカルシール・ユニットには種々の種類
があり、如何ような構成のメカニカルシール・ユニット
であってもよい。For a small amount of coolant leaking from the contact seal surface B, a leak reservoir 3a is provided at a predetermined position of the outer cover 3, and a drain hole 3b communicating with the leak reservoir 3a is provided. Drain. In such a configuration, the coolant leaked from the contact seal surface B never enters the oil cut groove portion 3c of the outer cover 3, the bearing 1, or even the inside C of the rotating electric machine. Further, since the thrust-direction sliding ring 7b and the rotating ring 7c of the mechanical seal unit 7 are made of an inorganic material having excellent wear resistance, the amount of wear is extremely small, and it is possible to extend the life. Become. Note that there are various types of mechanical seal units, and the mechanical seal unit may have any configuration.
【００１２】[0012]
【発明の効果】以上説明したように本発明によれば、回
転電機の反伝動側の軸受ハウジングの外カバーよりさら
に外側の位置に冷却液箱を設け、該冷却液箱の一端面を
上記外カバーの外側端面と係合させて密閉化し、上記冷
却液箱に、冷却液を排出するための排液口を設けるとと
もに、回転子を装着した中空軸の穴の中に挿入される所
定長さの入液パイプを取り付け、上記外カバーの外側端
面に取り付けられた取付金具にメカニカルシール・ユニ
ットのスラスト方向摺動リングを装着し、また、上記中
空軸を冷却液箱内の所定位置まで延伸し、該延伸された
中空軸に取り付けられた取付金具にメカニカルシールユ
ニットの回転リングを装着し、上記メカニカルシール・
ユニットにより、冷却液箱内の冷却液が回転電機内部に
浸入するのを防止するとともに、上記外カバーに、上記
メカニカルシール・ユニットから漏れ、中空軸の外周と
外カバーの間を通って回転電機内部に浸入しようとする
冷却液を溜めて外部に排出させるための漏液溜め部を設
け、上記入液パイプの一端から流入した冷却液を、上記
入液パイプを介して上記中空軸内に流入させ、中空軸内
周と上記入液パイプ外周間の間隙を介して冷却液箱に戻
し、戻ってきた冷却液を上記冷却液箱に設けられた排液
口から排出させるように構成したので、回転電機のパワ
ーアップ化・高速化を図ることができる。また、メカニ
カルシール・ユニットから漏れた冷却液が外カバーの油
切り溝部や軸受けやさらには回転電機内部にまで浸入す
ることが全く無くなる。さらに、メカニカルシール・ユ
ニットのスラスト方向摺動リングと回転リングの材料と
して耐磨耗性の優れた無機材料を使用することにより磨
耗量が極めて少なくなり、長寿命化が可能となる。As described above, according to the present invention, a coolant box is provided at a position further outside the outer cover of the bearing housing on the counter-transmission side of the rotating electric machine , and one end face of the coolant box is provided.
Engage with the outer end surface of the outer cover to make it tight,
If a drain port for draining the cooling liquid is provided in the
Where the rotor is inserted into the hole of the hollow shaft
Attach a fixed length liquid inlet pipe and the outer end of the outer cover
A mechanical seal unit is attached to the mounting bracket attached to the surface.
Attach the slide ring in the thrust direction of the
The hollow shaft is stretched to a predetermined position in the coolant box, and the stretched
A mechanical seal is attached to the mounting bracket attached to the hollow shaft.
Attach the rotating ring of the knit, and install the mechanical seal
The unit allows the coolant in the coolant box to enter the rotating electrical machine.
In addition to preventing intrusion, the outer cover
Leakage from the mechanical seal unit,
Attempts to penetrate into the rotating electrical machine through the space between the outer covers
A leak reservoir is provided to store the coolant and discharge it to the outside.
The coolant flowing from one end of the liquid inlet pipe is
Flow into the hollow shaft through the liquid inlet pipe, and
Return to the cooling liquid box through the gap between
And returns the returned coolant to the drainage provided in the coolant box.
It is configured to discharge from the mouth,
Speedup and speedup. Also, mechanic
The coolant leaked from the cull seal unit is completely prevented from entering the oil cut groove portion of the outer cover, the bearing, and further into the rotating electric machine. Further, by using an inorganic material having excellent wear resistance as a material of the sliding ring and the rotating ring in the thrust direction of the mechanical seal unit, the amount of wear is extremely reduced, and the service life can be extended.
【図１】本発明の一実施例を示す一部断面図である。FIG. 1 is a partial sectional view showing one embodiment of the present invention.
【図２】図１の部分拡大断面図である。FIG. 2 is a partially enlarged sectional view of FIG.
【図３】従来の一例を示す部分拡大断面図である。FIG. 3 is a partially enlarged cross-sectional view showing an example of the related art.
１ 軸受 ２ 軸受ハウジング ３ 外カバー ３ａ 漏液溜め部 ３ｂ ドレン穴 ３ｃ 油切り溝部 ３ｄ 外側端面 ４ 回転子 ５ 中空軸 ５ａ 穴 ５ｂ 穴の端面 ５ｃ 隙間 ５ｄ 穴の開口部 ６ 冷却液箱 ６ａ 入液パイプ ６ｂ 排液口 ６ｃ 入液口 ７ メカニカルシール・ユニット ７ａ 取付金具 ７ｂ スラスト方向摺動リング ７ｃ 回転リング ７ｄ 取付金具 Ａ 内部空間 Ｂ 接触シール面 Ｃ 回転電機の内部 ８ 固定子 ３ｅ 排液口 ９ 冷却液蓋 ９ａ 入液パイプ ９ｃ 入液口 10 オイルシール 11 取付金具 12 押え板 Ｄ 内部空間 DESCRIPTION OF SYMBOLS 1 Bearing 2 Bearing housing 3 Outer cover 3a Leakage reservoir 3b Drain hole 3c Oil drain groove 3d Outer end face 4 Rotor 5 Hollow shaft 5a Hole 5b Hole end face 5c Gap 5d Hole opening 6 Cooling liquid box 6a Liquid inlet pipe 6b Drain port 6c Liquid inlet 7 Mechanical seal unit 7a Mounting bracket 7b Thrust direction sliding ring 7c Rotating ring 7d Mounting bracket A Internal space B Contact seal surface C Inside of rotary electric machine 8 Stator 3e Drain port 9 Coolant Lid 9a Liquid inlet pipe 9c Liquid inlet 10 Oil seal 11 Mounting bracket 12 Holding plate D Internal space
Claims (1)
りさらに外側の位置に冷却液箱を設け、該冷却液箱の一
端面を上記外カバーの外側端面と係合させて密閉化し、 上記冷却液箱に、冷却液を排出するための排液口を設け
るとともに、回転子を装着した中空軸の穴の中に挿入さ
れる所定長さの入液パイプを取り付け、 上記外カバーの外側端面に取り付けられた取付金具にメ
カニカルシール・ユニットのスラスト方向摺動リングを
装着し、また、上記中空軸を冷却液箱内の所定位置まで
延伸し、該延伸された中空軸に取り付けられた取付金具
にメカニカルシールユニットの回転リングを装着し、 上記メカニカルシール・ユニットにより、冷却液箱内の
冷却液が回転電機内部に浸入するのを防止するととも
に、上記外カバーに、上記メカニカルシール・ユニット
から漏れ、中空軸の外周と外カバーの間を通って回転電
機内部に浸入しようとする冷却液を溜めて外部に排出さ
せるための漏液溜め部を設け、 上記入液パイプの一端から流入した冷却液を、上記入液
パイプを介して上記中空軸内に流入させ、中空軸内周と
上記入液パイプ外周間の間隙を介して冷却液箱に戻し、
戻ってきた冷却液を上記冷却液箱に設けられた排液口か
ら排出させる ことを特徴とした回転電機の回転子の液冷
却装置。1. A cooling liquid box is provided at a position further outward than an outer cover of a bearing housing on a counter power transmission side .
The end face is engaged with the outer end face of the outer cover to be sealed, and the coolant box is provided with a drain port for discharging the coolant.
And insert it into the hole of the hollow shaft
Attach the specified length of liquid inlet pipe to the outer cover and attach it to the mounting bracket attached to the outer end surface of the outer cover.
Slide the sliding ring of the canal seal unit in the thrust direction.
Attach the above hollow shaft to a predetermined position in the coolant box.
Stretched, mounting bracket attached to the stretched hollow shaft
Attach the rotating ring of the mechanical seal unit to the
Prevents coolant from entering the rotating electrical machine
And the above-mentioned mechanical seal unit on the above-mentioned outer cover.
From the outer periphery of the hollow shaft and the outer cover.
Coolant that is trying to enter the inside of the machine is collected and discharged to the outside.
And a cooling liquid flowing from one end of the liquid inlet pipe.
Flow into the hollow shaft through a pipe,
Return to the cooling liquid box through the gap between the liquid inlet pipe outer circumference,
Return the returned coolant to the drain port provided in the coolant box.
A liquid cooling device for a rotor of a rotating electric machine, characterized in that the liquid is discharged from the rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5341928A JP2738814B2 (en) | 1993-12-13 | 1993-12-13 | Liquid cooling device for rotor of rotating electric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5341928A JP2738814B2 (en) | 1993-12-13 | 1993-12-13 | Liquid cooling device for rotor of rotating electric machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07170694A JPH07170694A (en) | 1995-07-04 |
| JP2738814B2 true JP2738814B2 (en) | 1998-04-08 |
Family
ID=18349844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5341928A Expired - Lifetime JP2738814B2 (en) | 1993-12-13 | 1993-12-13 | Liquid cooling device for rotor of rotating electric machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2738814B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008259326A (en) * | 2007-04-05 | 2008-10-23 | Toyo Electric Mfg Co Ltd | Motor |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11543033B2 (en) | 2016-12-29 | 2023-01-03 | Eagle Industry Co., Ltd. | Mechanical seal |
| DE102018218815A1 (en) * | 2018-11-05 | 2020-05-07 | Zf Friedrichshafen Ag | Electrical machine with a fluid cooling device |
| CN114370507A (en) * | 2021-12-23 | 2022-04-19 | 伊格尔密封研发(无锡)有限公司 | Mechanical sealing element |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50104303A (en) * | 1974-01-25 | 1975-08-18 |
-
1993
- 1993-12-13 JP JP5341928A patent/JP2738814B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008259326A (en) * | 2007-04-05 | 2008-10-23 | Toyo Electric Mfg Co Ltd | Motor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07170694A (en) | 1995-07-04 |
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