JPH05302676A - Shaft sealing device for vertical rotary machine - Google Patents
Shaft sealing device for vertical rotary machineInfo
- Publication number
- JPH05302676A JPH05302676A JP4107306A JP10730692A JPH05302676A JP H05302676 A JPH05302676 A JP H05302676A JP 4107306 A JP4107306 A JP 4107306A JP 10730692 A JP10730692 A JP 10730692A JP H05302676 A JPH05302676 A JP H05302676A
- Authority
- JP
- Japan
- Prior art keywords
- seal
- labyrinth seal
- magnetic fluid
- sealing device
- bearing
- 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
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/74—Sealings of sliding-contact bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/74—Sealings of sliding-contact bearings
- F16C33/741—Sealings of sliding-contact bearings by means of a fluid
- F16C33/743—Sealings of sliding-contact bearings by means of a fluid retained in the sealing gap
- F16C33/746—Sealings of sliding-contact bearings by means of a fluid retained in the sealing gap by a magnetic field
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
- Sealing Of Bearings (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は縦型回転機械の軸受部で
発生するオイルベーパがシール部から漏出するのを防止
するための軸封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 shaft seal device for preventing oil vapor generated in a bearing portion of a vertical rotary machine from leaking from a seal portion.
【0002】[0002]
【従来の技術】近年、各技術分野における環境汚染の取
締りが厳しくなる中で、各種回転機械の油潤滑軸受のオ
イルベーパの漏れ防止対策が必要となっおり、また原子
力発電所に設置される各種回転機械(例えば誘導電動機
など)では長期信頼性とメンテナンスフリーの要求が強
い。2. Description of the Related Art In recent years, as the control of environmental pollution in each technical field becomes severe, it is necessary to take measures to prevent leakage of oil vapor of oil-lubricated bearings of various rotary machines. Machines (such as induction motors) have strong demands for long-term reliability and maintenance-free.
【0003】前記軸受部からのオイルベーパの漏れは、
軸受ハウジング内の潤滑剤の油量減少による軸受性能を
低下させ、また機内へのオイルベーパの漏出はコイル被
覆等の絶縁物の劣化による絶縁破壊等を引き起こし、事
故発生の主原因となる恐れがある。次に、従来技術の代
表例を引用して、オイルベーパの漏れの現象について図
4乃至図7に従い詳細に説明する。The leakage of oil vapor from the bearing portion is
The bearing performance may be deteriorated due to the reduction of the amount of lubricant in the bearing housing, and the leakage of oil vapor into the machine may cause the dielectric breakdown due to the deterioration of the insulation such as the coil coating, which may be the main cause of the accident. .. Next, referring to typical examples of the prior art, the phenomenon of oil vapor leakage will be described in detail with reference to FIGS.
【0004】この従来技術は原子力発電所に設置される
誘導電動機を縦型回転機械の代表例として示したもの
で、回転軸1の下端軸部にスラストカラー2が嵌合固定
され、このスラストカラー2の下側に該カラーを回転可
能に支承する数セクターからなるスラストパッド軸受3
と、このスラストパッド軸受3をコイルスプリング等の
弾性体4を介して支持するパッド支持台5が配置され
る。This prior art shows an induction motor installed in a nuclear power plant as a typical example of a vertical rotary machine. A thrust collar 2 is fitted and fixed to a lower end shaft portion of a rotary shaft 1, and this thrust collar is used. Thrust pad bearing 3 consisting of several sectors rotatably supporting the collar underneath
Then, a pad support base 5 for supporting the thrust pad bearing 3 via an elastic body 4 such as a coil spring is arranged.
【0005】前記スラストカラー2の外周にはガイド軸
受6が配置され、このガイド軸受6は軸受ハウジング7
に固定されている。この軸受ハウジング7は回転軸1の
下端軸部を囲繞する環状内壁8を有し、前記ガイド軸受
6の上方に位置するハウジング上部にはラビリンスシー
ル9が設置されている。A guide bearing 6 is arranged on the outer circumference of the thrust collar 2, and the guide bearing 6 is a bearing housing 7.
It is fixed to. The bearing housing 7 has an annular inner wall 8 surrounding the lower end shaft portion of the rotary shaft 1, and a labyrinth seal 9 is installed above the guide bearing 6 at the upper part of the housing.
【0006】また、前記ハウジング7の内部には潤滑剤
11が封入され、この潤滑剤11を冷却させる冷却管1
0が前記ハウジング7の内部に配設される。そして、こ
の軸受ハウジング7は支持リブ12により基礎床13に
強固に固定されるが、このハウジング上部には気抜き管
18が接続され、この気抜き管18の管端部にはフィル
ター19が設けられている。A lubricant 11 is enclosed in the housing 7, and a cooling pipe 1 for cooling the lubricant 11 is provided.
0 is disposed inside the housing 7. The bearing housing 7 is firmly fixed to the foundation floor 13 by the support ribs 12. An air vent pipe 18 is connected to the upper part of the housing, and a filter 19 is provided at the end of the air vent pipe 18. Has been.
【0007】前記回転軸1にはロータ鉄心14aとロー
タコイル14bとからなる回転子14が嵌合固定され、
前記回転軸1を外囲するステータフレーム15には固定
子鉄心16aと固定子コイル16bとからなる固定子1
6が嵌合固定され、前記ステータフレーム15の下側外
周部には数個の冷却ファン17が取付けられている。次
に、前記のような構成での作用について説明する。A rotor 14 composed of a rotor core 14a and a rotor coil 14b is fitted and fixed to the rotary shaft 1,
A stator frame 15 surrounding the rotary shaft 1 has a stator 1 including a stator core 16a and a stator coil 16b.
6 are fitted and fixed, and several cooling fans 17 are attached to the lower outer peripheral portion of the stator frame 15. Next, the operation of the above configuration will be described.
【0008】前記回転軸1が回転すると、この回転軸1
に取付けられたスラストカラー2の底部摺動面2aによ
る潤滑剤11の粘性撹拌効果により、図4矢印イで示す
ような潤滑剤11の激しい循環流れが発生する。When the rotary shaft 1 rotates, the rotary shaft 1
Due to the viscous stirring effect of the lubricant 11 by the bottom sliding surface 2a of the thrust collar 2 attached to the, a vigorous circulating flow of the lubricant 11 as shown by arrow A in FIG. 4 is generated.
【0009】また、スラストカラー2に加工された自己
ポンプ孔2bでは、この孔の遠心ポンプ作用により潤滑
剤11はガイド軸受6に供給され、このガイド軸受6に
設けられた環状溝6aと数本の縦溝6b並びに軸受ハウ
ジング7の油路7aを介して図4矢印ロで示すように循
環される。特に、ガイド軸受6より放出される潤滑剤1
1は多量の空気を巻き込み、軸受ハウジング7内に還元
される。In the self-pump hole 2b formed in the thrust collar 2, the lubricant 11 is supplied to the guide bearing 6 by the centrifugal pump action of this hole, and the annular groove 6a provided in the guide bearing 6 and several holes. 4 is circulated through the vertical groove 6b and the oil passage 7a of the bearing housing 7 as shown by an arrow B in FIG. In particular, the lubricant 1 discharged from the guide bearing 6
1 entrains a large amount of air and is returned into the bearing housing 7.
【0010】このような潤滑剤11の循環流れでは、ス
ラストパッド軸受3とガイド軸受6の軸受損失及びスラ
ストカラー2による撹拌損失が大きくなるため、軸受ハ
ウジング7内部の潤滑剤11の温度が高くなる。この結
果、潤滑剤11からオイルベーパが発生すると共に、軸
受ハウジング7の内部圧力が高くなる。In such a circulating flow of the lubricant 11, since the bearing loss of the thrust pad bearing 3 and the guide bearing 6 and the agitation loss due to the thrust collar 2 become large, the temperature of the lubricant 11 inside the bearing housing 7 becomes high. .. As a result, oil vapor is generated from the lubricant 11 and the internal pressure of the bearing housing 7 increases.
【0011】前記オイルベーパは気抜き管18からフィ
ルター19を通して排出されるが、このフィルター19
は通過するオイルベーパを空気と潤滑剤11に分離し、
空気だけを外部に排出して分離潤滑剤11は回収するよ
うにされる。The oil vapor is discharged from the vent pipe 18 through a filter 19, which is
Separates the passing oil vapor into air and lubricant 11,
Only the air is discharged to the outside and the separated lubricant 11 is collected.
【0012】ただ、ここではメッシュの細かいフィルタ
ー19を適用すると圧力損失が大きくなり、軸受ハウジ
ング7の内部圧力が高くなる。逆に、メッシュの粗いフ
ィルター19では潤滑剤11の回収量が少なくなる。従
って、適度なメッシュ粗さのフィルター19が選定さ
れ、軸受ハウジング7の内部圧力は若干増加する(実測
値では数百mmaq程度)。However, if a filter 19 having a fine mesh is applied here, the pressure loss becomes large and the internal pressure of the bearing housing 7 becomes high. On the contrary, the filter 19 having a coarse mesh reduces the amount of the lubricant 11 collected. Therefore, the filter 19 having an appropriate mesh roughness is selected, and the internal pressure of the bearing housing 7 is slightly increased (actually, several hundred mmaq).
【0013】一方、機内には冷却ファン17により冷た
い空気が送り込まれ、機内の平均的な圧力はかなり高く
なる。ところが、ラビリンスシール9の上部空間には回
転軸1の軸端面1aの遠心ファン作用により、図4矢印
ハに示すような空気流れが発生するので、ラビリンスシ
ール9の上端部位置における圧力は負圧になる。On the other hand, cool air is sent into the machine by the cooling fan 17, and the average pressure in the machine becomes considerably high. However, in the upper space of the labyrinth seal 9, an air flow as shown by an arrow C in FIG. 4 is generated by the centrifugal fan action of the shaft end surface 1a of the rotary shaft 1, so that the pressure at the upper end position of the labyrinth seal 9 is a negative pressure. become.
【0014】また、縦型回転機械の場合、回転軸1の振
れ回りが前記ガイド軸受6の軸受隙間20程度になる場
合もあることから、ラビリンスシール9のシール隙間2
1は軸受隙間20より大きく取られる。更に、軸受隙間
20にはスラストカラー2の動的作用により潤滑膜が形
成され、図6および図7に示すような流体膜圧力が発生
する。すなわち、図6はスラストカラー2が振れ回った
時の円周方向の圧力分布図、図7は軸受幅方向の圧力分
布図(図6のB−B矢視図)である。このため、ガイド
軸受6の軸受幅端部より潤滑剤11がスラストカラー2
の表面に沿って飛びだし、容易にラビリンスシール9に
到達する。Further, in the case of a vertical rotary machine, the whirling of the rotary shaft 1 may be about the bearing clearance 20 of the guide bearing 6, so that the seal clearance 2 of the labyrinth seal 9 is provided.
1 is larger than the bearing gap 20. Further, a lubricating film is formed in the bearing gap 20 by the dynamic action of the thrust collar 2, and a fluid film pressure as shown in FIGS. 6 and 7 is generated. That is, FIG. 6 is a pressure distribution diagram in the circumferential direction when the thrust collar 2 swings around, and FIG. 7 is a pressure distribution diagram in the bearing width direction (a view taken along the line BB in FIG. 6). For this reason, the lubricant 11 is applied to the thrust collar 2 from the end of the bearing width of the guide bearing 6.
It jumps out along the surface of and reaches the labyrinth seal 9 easily.
【0015】[0015]
【発明が解決しようとする課題】前記従来例で述べたよ
うなラビリンスシール9による軸封装置では、油潤滑軸
受部で発生したオイルベーパがラビリンスシール9のシ
ール隙間21から軸受ハウジング7の外部(前記従来例
では機内)へ漏出し、軸受ハウジング7内の潤滑剤11
の油量減少による軸受性能を低下させる問題があり、ま
た前記オイルベーパの機外漏出による環境汚染の問題も
発生する。特に、前記軸封装置を前述した従来例の縦型
回転機械(誘導電動機)に適用した場合には、機内漏出
のオイルベーパがロータコイル14bや固定子コイル1
6bの絶縁物を劣化させ、絶縁破壊等の問題を引き起こ
すという問題があった。In the shaft sealing device with the labyrinth seal 9 as described in the above-mentioned conventional example, the oil vapor generated in the oil lubricated bearing portion is exposed from the seal gap 21 of the labyrinth seal 9 to the outside of the bearing housing 7 (the above-mentioned In the conventional example, it leaks to the machine and the lubricant 11 in the bearing housing 7
However, there is a problem that the bearing performance is deteriorated due to the decrease of the oil amount, and there is a problem of environmental pollution due to the leakage of the oil vapor out of the machine. In particular, when the shaft sealing device is applied to the above-described conventional vertical rotary machine (induction motor), the oil vapor leaking inside the machine causes the rotor coil 14b and the stator coil 1 to leak.
There is a problem that the insulator 6b is deteriorated and causes problems such as dielectric breakdown.
【0016】本発明は前記従来の問題を解消するために
なされたもので、その目的は油潤滑軸受部で発生したオ
イルベーパがラビリンスシールのシール隙間から軸受ハ
ウジングの外部へ漏出するのを完全に防止することがで
きる長期信頼性及びメンテナンスフリーの軸封装置を提
供することにある。The present invention has been made to solve the above-mentioned conventional problems, and its purpose is to completely prevent the oil vapor generated in the oil lubricated bearing portion from leaking out of the bearing housing through the seal gap of the labyrinth seal. (EN) Provided is a long-term reliable and maintenance-free shaft sealing device.
【0017】[0017]
【課題を解決するための手段】前記の目的を達成するた
めに、本発明の縦型回転機械における軸封装置は、上部
ラビリンスシールと下部ラビリンスシールの間に、磁路
テースと磁性流体と永久磁石とからなる磁性流体シール
装置を組込み、且つ各ラビリンスシールのチャンバー部
にパージガスを供給する手段と、磁路テースの背面を水
冷する手段とを設けたことを特徴とする。In order to achieve the above-mentioned object, a shaft sealing device in a vertical rotary machine of the present invention comprises a magnetic path tooth, a magnetic fluid and a permanent magnet between a top labyrinth seal and a bottom labyrinth seal. A magnetic fluid sealing device including a magnet is incorporated, and means for supplying a purge gas to the chamber portion of each labyrinth seal and means for cooling the back surface of the magnetic path teeth with water are provided.
【0018】[0018]
【作用】磁路テースと磁性流体及び永久磁石からなる磁
性流体シール装置では、永久磁石が作る磁気回路により
磁性流体が磁路テースに密着して、回転軸と磁路テース
との間の隙間を磁性流体でシールするので、シール性が
完璧となり、油潤滑軸受部で発生したオイルベーパが前
記隙間から軸受ハウジングの外部へ漏出するのを完全に
防止することができる。In the magnetic fluid seal device including the magnetic path teeth, the magnetic fluid, and the permanent magnet, the magnetic fluid is brought into close contact with the magnetic path teeth by the magnetic circuit formed by the permanent magnets, and the gap between the rotating shaft and the magnetic path teeth is formed. Since the sealing is performed with the magnetic fluid, the sealing property is perfect, and it is possible to completely prevent the oil vapor generated in the oil lubricated bearing portion from leaking to the outside of the bearing housing through the gap.
【0019】また、上部ラビリンスシール及び下部ラビ
リンスシールのチャンバー部にパージガスを供給するこ
とにより、磁性流体へのオイルベーパの混入による磁性
流体のシール性能の劣化防止を計り、且つ磁性流体シー
ル装置の上下部における差圧を出来るだけ小さくするこ
とができる。更に、磁路テースの背面を水冷することに
より、磁路テースの温度上昇を押さえ磁性流体の蒸発を
防止し、長期信頼性を向上させ得る。Further, by supplying a purge gas to the chamber portions of the upper labyrinth seal and the lower labyrinth seal, it is possible to prevent deterioration of the sealing performance of the magnetic fluid due to the mixing of the oil vapor with the magnetic fluid, and the upper and lower portions of the magnetic fluid sealing device. It is possible to minimize the differential pressure at. Further, by cooling the back surface of the magnetic path teeth with water, the temperature rise of the magnetic path teeth can be suppressed and evaporation of the magnetic fluid can be prevented, so that long-term reliability can be improved.
【0020】[0020]
【実施例】以下、本発明の一実施例を図1乃至図3に従
い具体的に説明する。なお、図4乃至図6で説明した従
来技術と同一の部分については、同一符号を付して説明
を省略する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to FIGS. The same parts as those of the conventional technique described with reference to FIGS. 4 to 6 are designated by the same reference numerals and the description thereof will be omitted.
【0021】図1のY部(図2)は、図4の従来技術で
示したX部(図5に示すラビリンスシール部分)に相当
し、この部分の構成即ち本発明の軸封装置の構成は、図
2及び図3に示すように、上部ラビリンスシール22と
磁性流体シール装置23と下部ラビリンスシール24と
からなり、これらは非磁性体からなるシールケーシング
25内に図2の如く配置固定される。The Y portion (FIG. 2) of FIG. 1 corresponds to the X portion (labyrinth seal portion shown in FIG. 5) shown in the prior art of FIG. 4, and the construction of this portion, that is, the construction of the shaft sealing device of the present invention. As shown in FIGS. 2 and 3, includes an upper labyrinth seal 22, a magnetic fluid sealing device 23, and a lower labyrinth seal 24, which are arranged and fixed in a seal casing 25 made of a non-magnetic material as shown in FIG. It
【0022】前記上部ラビリンスシール22は上側に位
置するラビリンス部22aと磁性流体シール装置23側
に位置するチャンバー部22bとを有し、下部ラビリン
スシール24は下側に位置するラビリンス部24aと磁
性流体シール装置23側に位置するチャンバー部24b
とを有する。The upper labyrinth seal 22 has a labyrinth portion 22a located on the upper side and a chamber portion 22b located on the magnetic fluid sealing device 23 side, and the lower labyrinth seal 24 has a labyrinth portion 24a located on the lower side and a magnetic fluid. Chamber part 24b located on the sealing device 23 side
Have and.
【0023】前記磁性流体シール装置23は上部ラビリ
ンスシール22と下部ラビリンスシール24の間に組込
まれており、その構成は円周上に配列された数個の永久
磁石26と、この永久磁石26を挟むように配設された
上下一対の磁路テース27,28と、この上下磁路テー
ス27,28の先端に密着し回転軸1と磁路テース2
7,28との間の隙間をシールする磁性流体29とから
なっている。The magnetic fluid sealing device 23 is incorporated between the upper labyrinth seal 22 and the lower labyrinth seal 24, and its construction is composed of several permanent magnets 26 arranged on the circumference and the permanent magnets 26. A pair of upper and lower magnetic path teeth 27 and 28 arranged so as to be sandwiched, and the rotary shaft 1 and the magnetic path teeth 2 are closely attached to the tips of the upper and lower magnetic path teeth 27 and 28.
And a magnetic fluid 29 that seals the gap between them and.
【0024】前記磁路テース27,28の外周面には、
水冷円周溝27a,28aとOリング溝27b,28b
が加工形成され、このOリング溝27b,28b内にO
リング30が設置されている。On the outer peripheral surfaces of the magnetic path teeth 27 and 28,
Water-cooled circumferential grooves 27a, 28a and O-ring grooves 27b, 28b
Are processed and formed, and O is formed in the O-ring grooves 27b and 28b.
The ring 30 is installed.
【0025】また、前記シールケーシング25には水冷
円周溝27a,28aに交差する給水溝25aと排水溝
25bが加工形成され、この給水溝25a及び排水溝2
5bには給水孔25cと排水溝25dが連通している。
そして、この給水孔25cには給水管31が冷却管10
の入口に流量調整バルブ32を介して接続され、前記排
水溝25dには図示しない配水管が接続される。A water supply groove 25a and a drain groove 25b intersecting with the water-cooled circumferential grooves 27a, 28a are formed in the seal casing 25. The water supply groove 25a and the drain groove 2 are formed.
A water supply hole 25c and a drain groove 25d communicate with 5b.
The water supply pipe 31 is provided in the water supply hole 25c.
Is connected via a flow rate adjusting valve 32, and a water distribution pipe (not shown) is connected to the drain groove 25d.
【0026】前記ラビリンスシール22,24及びシー
ルケーシング25には、上部ラビリンスシール22のチ
ャンバー部22bと下部ラビリンスシール24のチャン
バー部24bに連通開孔するパージガス導入孔22c,
24c,25eが設けられ、このシールケーシング25
のパージガス導入孔25eにはパージガス導入管33が
接続され、その先端は冷却ファン17の吐き出し口の近
傍に位置し、そこに集風装置34が設置されている。In the labyrinth seals 22 and 24 and the seal casing 25, there are purge gas introduction holes 22c which are open to communicate with the chamber portion 22b of the upper labyrinth seal 22 and the chamber portion 24b of the lower labyrinth seal 24.
24c and 25e are provided, and the seal casing 25
A purge gas introducing pipe 33 is connected to the purge gas introducing hole 25e, the tip of which is located in the vicinity of the outlet of the cooling fan 17, and the air collecting device 34 is installed therein.
【0027】次に、作用について説明する。磁路テース
27,28と磁性流体29及び永久磁石26からなる磁
性流体シール装置23では、永久磁石26により図2の
鎖線で示すような磁気回路35が発生する。Next, the operation will be described. In the magnetic fluid seal device 23 including the magnetic path teeth 27, 28, the magnetic fluid 29, and the permanent magnet 26, the permanent magnet 26 causes the magnetic circuit 35 as shown by the chain line in FIG.
【0028】このため、磁性流体29は永久磁石26が
作る磁気回路35により磁路テース27,28に密着
し、且つ回転軸1と磁路テース27,28との間に強靭
な磁性流体膜を形成して、完璧なシール機能を維持す
る。Therefore, the magnetic fluid 29 adheres to the magnetic path teeth 27 and 28 by the magnetic circuit 35 formed by the permanent magnet 26, and a strong magnetic fluid film is formed between the rotary shaft 1 and the magnetic path teeth 27 and 28. Form and maintain perfect sealing function.
【0029】前記磁性流体29は潤滑剤11等の異質の
媒体が混入すると、磁性流体29のシール機能が低下す
ることが知られている。そこで、本発明においては上部
ラビリンスシール22及び下部ラビリンスシール24の
チャンバー部22b,24bに、冷却ファン17の出口
に設けられた集風装置34より圧力の高い空気をパージ
ガス導入管33を介して供給する。この空気(パージガ
ス)の一部は、下部ラビリンスシール24のラビリンス
部24aを通り軸受ハウジング7内に供給されるので、
軸受ハウジング7で発生したオイルベーパは磁性流体2
9の位置に到達しない。It is known that when the magnetic fluid 29 is mixed with a different medium such as the lubricant 11, the sealing function of the magnetic fluid 29 is deteriorated. Therefore, in the present invention, the chambers 22b and 24b of the upper labyrinth seal 22 and the lower labyrinth seal 24 are supplied with air having a higher pressure than the air collecting device 34 provided at the outlet of the cooling fan 17 through the purge gas introducing pipe 33. To do. Part of this air (purge gas) is supplied into the bearing housing 7 through the labyrinth portion 24 a of the lower labyrinth seal 24.
The oil vapor generated in the bearing housing 7 is the magnetic fluid 2
Does not reach position 9.
【0030】一方、集風装置34より供給される空気
(パージガス)の一部は、上部ラビリンスシール22の
チャンバー部22bにも供給され、上部ラビリンスシー
ル22のラビリンス部22aを通り機内へと排出され
る。このため、磁性流体シール装置23の上下部の圧力
差は極めて小さく、磁性流体29の負担するシール機能
は非常に楽になり、且つパージガスの導入により磁性流
体シール装置23は冷却される。また、磁路テース2
7,28の背面を水冷することにより、磁路テース2
7,28及び磁性流体29の温度は低下し、磁性流体2
9の蒸発を防止することができ、長期信頼性に極めて効
果的となる。On the other hand, part of the air (purge gas) supplied from the air collecting device 34 is also supplied to the chamber portion 22b of the upper labyrinth seal 22, passes through the labyrinth portion 22a of the upper labyrinth seal 22, and is discharged into the machine. It Therefore, the pressure difference between the upper and lower portions of the magnetic fluid sealing device 23 is extremely small, the sealing function of the magnetic fluid 29 becomes very easy, and the introduction of the purge gas cools the magnetic fluid sealing device 23. In addition, magnetic path teeth 2
By cooling the back of 7, 28 with water,
The temperatures of 7, 28 and the magnetic fluid 29 are lowered,
9 can be prevented from evaporating, which is extremely effective for long-term reliability.
【0031】[0031]
【発明の効果】本発明の軸封装置によれば、油潤滑軸受
部で発生したオイルベーパを低速並びに高速領域の広い
範囲において完璧にシールすることができ、このことに
より軸受ハウジングの油面低下による軸受性能の悪化や
環境汚染の問題が改善され、長期信頼性に優れメンテナ
ンスフリーの軸受となり、高性能で長期信頼性に優れた
縦型回転機械を提供することができる。According to the shaft sealing device of the present invention, the oil vapor generated in the oil-lubricated bearing portion can be perfectly sealed in a wide range of low speed and high speed regions. It is possible to provide a vertical rotary machine that has improved long-term reliability and is maintenance-free, and that has high performance and long-term reliability because the problems of deterioration of bearing performance and environmental pollution are improved.
【図1】本発明の一実施例による縦型回転機械の軸封装
置を示す要部縦断面図。FIG. 1 is a longitudinal sectional view of an essential part showing a shaft sealing device for a vertical rotary machine according to an embodiment of the present invention.
【図2】図1のY部を拡大して示した主要部の詳細図。FIG. 2 is a detailed view of a main part showing an enlarged part Y of FIG.
【図3】図2のAーA線に沿う横断面図。3 is a cross-sectional view taken along the line AA of FIG.
【図4】従来の縦型回転機械における軸封装置を示す要
部縦断面図。FIG. 4 is a longitudinal sectional view of a main part showing a shaft sealing device in a conventional vertical rotary machine.
【図5】図4のX部を拡大して示した詳細図。5 is a detailed view showing an enlarged part X of FIG.
【図6】従来技術の問題点を説明するための原理図。FIG. 6 is a principle diagram for explaining a problem of the conventional technique.
【図7】図6のB−B矢視図FIG. 7 is a view on arrow BB in FIG.
1 回転軸 2 スラストカラー 3 スラストパッド軸受 5 パッド支持台 6 ガイド軸受 7 軸受ハウジング 11 潤滑剤 14 回転子 15 ステータフレーム 16 固定子 22 上部ラビリンスシール 23 磁性流体シール装置 24 下部ラビリンスシール 22a,24a 上下ラビリンスシールのラビリンス部 22b,24b チャンバー部 22c,24c パージガス導入孔 25 シールケーシング 25a 給水溝 25c 給水孔 25d 排水溝 25e パージガス導入孔 26 永久磁石 27,28 磁路テース 27a,28a 水冷円周溝 29 磁性流体 31 吸水管 33 パージガス導入管 34 集風装置 1 rotating shaft 2 thrust collar 3 thrust pad bearing 5 pad support 6 guide bearing 7 bearing housing 11 lubricant 14 rotor 15 stator frame 16 stator 22 upper labyrinth seal 23 magnetic fluid seal device 24 lower labyrinth seal 22a, 24a upper and lower labyrinth Seal labyrinth portion 22b, 24b Chamber portion 22c, 24c Purge gas introduction hole 25 Seal casing 25a Water supply groove 25c Water supply hole 25d Drain groove 25e Purge gas introduction hole 26 Permanent magnet 27, 28 Magnetic path teeth 27a, 28a Water-cooled circumferential groove 29 Magnetic fluid 31 Water absorption pipe 33 Purge gas introduction pipe 34 Air collecting device
Claims (1)
シールの間に、磁路テースと磁性流体と永久磁石とから
なる磁性流体シール装置を組込み、且つ各ラビリンスシ
ールのチャンバー部にパージガスを供給する手段と、磁
路テースの背面を水冷する手段とを設けたことを特徴と
する縦型回転機械の軸封装置。1. A means for incorporating a magnetic fluid seal device including a magnetic path tooth, a magnetic fluid and a permanent magnet between the upper labyrinth seal and the lower labyrinth seal, and means for supplying a purge gas to the chamber portion of each labyrinth seal, A shaft sealing device for a vertical rotating machine, characterized in that it is provided with means for cooling the back surface of the magnetic path texture with water.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4107306A JP2656422B2 (en) | 1992-04-27 | 1992-04-27 | Shaft sealing device for vertical rotating machines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4107306A JP2656422B2 (en) | 1992-04-27 | 1992-04-27 | Shaft sealing device for vertical rotating machines |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH05302676A true JPH05302676A (en) | 1993-11-16 |
JP2656422B2 JP2656422B2 (en) | 1997-09-24 |
Family
ID=14455748
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4107306A Expired - Lifetime JP2656422B2 (en) | 1992-04-27 | 1992-04-27 | Shaft sealing device for vertical rotating machines |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2656422B2 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08141533A (en) * | 1994-09-20 | 1996-06-04 | Dainippon Screen Mfg Co Ltd | Rotary substrate washing apparatus |
KR100973666B1 (en) * | 2003-06-17 | 2010-08-03 | 주성엔지니어링(주) | Gas valve assembly of atomic layer deposition apparatus |
KR101091549B1 (en) * | 2004-08-31 | 2011-12-14 | 주성엔지니어링(주) | Gas injector for semiconductor device and method of injecting gas |
CN104197024A (en) * | 2014-08-06 | 2014-12-10 | 北京交通大学 | Peristaltic pumping circulation cooling type magnetic liquid sealing device |
CN104455462A (en) * | 2014-09-29 | 2015-03-25 | 北京交通大学 | Magnetic liquid sealing device with labyrinth structure formed in pole shoes |
CN104864100A (en) * | 2015-05-14 | 2015-08-26 | 自贡兆强密封制品实业有限公司 | Combined sealing system of refrigerating compressor |
JPWO2019017250A1 (en) * | 2017-07-18 | 2020-06-25 | イーグル工業株式会社 | Shaft seal device |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105570466B (en) * | 2016-03-02 | 2017-11-21 | 广西科技大学 | A kind of symmetric form staged magnetic fluid seal device |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5115549U (en) * | 1974-07-20 | 1976-02-04 | ||
JPS5323906U (en) * | 1976-08-09 | 1978-02-28 | ||
JPS5425972U (en) * | 1977-07-25 | 1979-02-20 | ||
JPS58123967U (en) * | 1982-02-17 | 1983-08-23 | 株式会社富士電機総合研究所 | Magnetic fluid seal device |
-
1992
- 1992-04-27 JP JP4107306A patent/JP2656422B2/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5115549U (en) * | 1974-07-20 | 1976-02-04 | ||
JPS5323906U (en) * | 1976-08-09 | 1978-02-28 | ||
JPS5425972U (en) * | 1977-07-25 | 1979-02-20 | ||
JPS58123967U (en) * | 1982-02-17 | 1983-08-23 | 株式会社富士電機総合研究所 | Magnetic fluid seal device |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08141533A (en) * | 1994-09-20 | 1996-06-04 | Dainippon Screen Mfg Co Ltd | Rotary substrate washing apparatus |
KR100973666B1 (en) * | 2003-06-17 | 2010-08-03 | 주성엔지니어링(주) | Gas valve assembly of atomic layer deposition apparatus |
KR101091549B1 (en) * | 2004-08-31 | 2011-12-14 | 주성엔지니어링(주) | Gas injector for semiconductor device and method of injecting gas |
CN104197024A (en) * | 2014-08-06 | 2014-12-10 | 北京交通大学 | Peristaltic pumping circulation cooling type magnetic liquid sealing device |
CN104455462A (en) * | 2014-09-29 | 2015-03-25 | 北京交通大学 | Magnetic liquid sealing device with labyrinth structure formed in pole shoes |
CN104864100A (en) * | 2015-05-14 | 2015-08-26 | 自贡兆强密封制品实业有限公司 | Combined sealing system of refrigerating compressor |
CN104864100B (en) * | 2015-05-14 | 2016-09-21 | 自贡兆强密封制品实业有限公司 | Refrigerant condenser combination sealing system |
JPWO2019017250A1 (en) * | 2017-07-18 | 2020-06-25 | イーグル工業株式会社 | Shaft seal device |
Also Published As
Publication number | Publication date |
---|---|
JP2656422B2 (en) | 1997-09-24 |
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