JPS5884269A - Labyrinth seal structure - Google Patents
Labyrinth seal structureInfo
- Publication number
- JPS5884269A JPS5884269A JP18222581A JP18222581A JPS5884269A JP S5884269 A JPS5884269 A JP S5884269A JP 18222581 A JP18222581 A JP 18222581A JP 18222581 A JP18222581 A JP 18222581A JP S5884269 A JPS5884269 A JP S5884269A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- annular groove
- retainer
- labyrinth seal
- oil chamber
- 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.)
- Pending
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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/002—Sealings comprising at least two sealings in succession
- F16J15/004—Sealings comprising at least two sealings in succession forming of recuperation chamber for the leaking fluid
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は回転軸、特に高速で回転する回転軸のオイル
洩れ全防止するラビリンスシール構造に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a labyrinth seal structure that completely prevents oil leakage from a rotating shaft, particularly a rotating shaft rotating at high speed.
一般に、高速で回転する軸の軸シールとしては、ラビリ
ンスシールが広く用いられている。このラビリンスシー
ルは非接触シールであるため、装置内のオイル室内に存
在するオイル又はオイルミストが装置外に漏洩するのを
防止するため、ラビリンスシールの軸方向のほぼ中央に
シール用空気を供給してオイルを装置内に押し戻す方法
がとられている。In general, labyrinth seals are widely used as shaft seals for shafts that rotate at high speed. Since this labyrinth seal is a non-contact seal, sealing air is supplied to approximately the axial center of the labyrinth seal in order to prevent oil or oil mist existing in the oil chamber inside the device from leaking outside the device. The method used is to push the oil back into the equipment.
第１図は、そのような従来のラビリンスシール構造の、
−例を示すもので、高速で回転する回転軸１の外周部に
は円周に沿って複数の小突条２ｃ（以下「ラビリンス部
」と称する）を有するラビリンスシール２が一体的に固
設され、その外周部には僅かな隙間を有してリティナ６
が設けられている。リテイナ３には環状溝４と、この環
状溝４にシール用空気を供給する空気供給孔５を設けて
あり、装置内部のオイル室６と外部の空気室７とを仕切
る隔壁８はリテイナ３を保持する役をも兼ねている。Figure 1 shows such a conventional labyrinth seal structure.
- This is an example. A labyrinth seal 2 having a plurality of small protrusions 2c (hereinafter referred to as "labyrinth part") is integrally fixed on the outer periphery of a rotating shaft 1 that rotates at high speed. There is a slight gap around the outer periphery of the retina 6.
is provided. The retainer 3 is provided with an annular groove 4 and an air supply hole 5 for supplying sealing air to the annular groove 4. A partition wall 8 that partitions the oil chamber 6 inside the device and the air chamber 7 outside It also serves as a retainer.
しかしながら、このような従来のラビリンス構造にあっ
ては、環状溝４は空気供給孔５から供給されたシール用
空気金ラビリンスシール２の外周部に均一に供給するだ
けであるので、装置の運転を停止した場合や、運転中で
もオイル室６からラビリンスシールの内側部分２ａ及び
リティナ内周面の内側部分３ａｅ伝わってオイルが環状
溝４に充満すると、この充満したオイルがラビリンスク
ールの外側部分２ｂ及びリティナ内周面の外側部分３ｂ
會伝わって装置外の空気室７に漏洩する欠点があった。However, in such a conventional labyrinth structure, the annular groove 4 only uniformly supplies the sealing air supplied from the air supply hole 5 to the outer periphery of the gold labyrinth seal 2, making it difficult to operate the device. When the annular groove 4 is filled with oil transmitted from the oil chamber 6 to the inner portion 2a of the labyrinth seal and the inner circumferential surface 3ae of the inner circumferential surface of the retainer when the engine is stopped or during operation, this filled oil flows into the outer portion 2b of the labyrinth seal and the inner circumferential surface of the retainer. Outer portion 3b of inner peripheral surface
There was a drawback that the air leaked into the air chamber 7 outside the device through the air flow.
この発明は上記の点に鑑みてなされたもので、リテイナ
の環状溝底面にオイル室に連通ずるオイル通路を設ける
ことによフ、環状溝に溜ったオイルを、シール用空気の
圧力全利用してオイル室内へ押し戻すようにして従来の
問題点を解決しようとするものである。This invention has been made in view of the above points, and by providing an oil passage communicating with the oil chamber at the bottom of the annular groove of the retainer, the oil accumulated in the annular groove can be used to fully utilize the pressure of the sealing air. This is an attempt to solve the conventional problems by pushing the oil back into the oil chamber.
以下、添付図面の第２図及び第３図を参照してこの発明
の詳細な説明するが、第１図と同一の部分には同一の符
号全村してその部分の説Ｆ！Ａ′ｆ：省略する。Hereinafter, the present invention will be described in detail with reference to FIGS. 2 and 3 of the accompanying drawings. Parts that are the same as those in FIG. A′f: Omitted.
第２図はこの発明の１実施例を示すもので、リテイナ６
の環状溝４の底面とオイル室６との間にオイル通路９を
設けて、環状溝４．とオイル室６とを連通させ、オイル
通路９の断面積をラビリンスシール２とリティナ３で形
成されるわずかな環状間隙の断面積よシ小さくする。FIG. 2 shows one embodiment of the present invention, in which the retainer 6
An oil passage 9 is provided between the bottom surface of the annular groove 4 and the oil chamber 6, and the annular groove 4. and the oil chamber 6, and the cross-sectional area of the oil passage 9 is made smaller than the cross-sectional area of a slight annular gap formed by the labyrinth seal 2 and the retainer 3.
以上の構成で、装置の運転停止時又は運転中にオイル室
６内のオイル又はオイルミストがラビリンスシールの内
側部分２ａ及びリテイナ内周面の内側部分３ａＴｒ伝わ
って環状溝４に流入しても、空気供給孔５全通って環状
溝４に噴出するシール用空気の空気圧により、オイル通
路９を通ってオイル室６へ押じ戻され、外部に漏洩する
ことはない。With the above configuration, even when the oil or oil mist in the oil chamber 6 flows into the annular groove 4 through the inner part 2a of the labyrinth seal and the inner part 3aTr of the inner peripheral surface of the retainer when the device is stopped or in operation, The air pressure of the sealing air that passes through the entire air supply hole 5 and is ejected into the annular groove 4 pushes the sealing air back into the oil chamber 6 through the oil passage 9, and does not leak to the outside.
ここで、オイル通路９の断面積はラビリンスシール２と
リテイナ６の間に形成されるわずかな環状間隙部分の断
面積より小さくしであるので、環状溝４に噴出したシー
ル用空気の大部分はラビリンスシール部に作用してシー
ル効果に寄与し、残シの一部がオイル通路９に流れるだ
けであって、ラビリンスシール部の空気圧不足やオイル
室６内の空気圧上昇によってオイル洩れが発生するおそ
れはない。 ゛
次に、第３図は、上記実施例においてラビリンスシール
側に設けたラビリンス部をリティナ３側に設け、このラ
ビリンス部３ｃのほぼ中央に環状溝４及び空気供給孔５
を配したこの発明の他の実施例を示すもので、その他の
構成は第２図に示した前実施例と同じであり、その作用
効果についてもまた同様である。Here, since the cross-sectional area of the oil passage 9 is smaller than the cross-sectional area of the small annular gap formed between the labyrinth seal 2 and the retainer 6, most of the sealing air blown into the annular groove 4 is It acts on the labyrinth seal and contributes to the sealing effect, and only a portion of the remaining oil flows into the oil passage 9, which may cause oil leakage due to lack of air pressure in the labyrinth seal or increase in air pressure in the oil chamber 6. That's not it. Next, FIG. 3 shows that the labyrinth part provided on the labyrinth seal side in the above embodiment is provided on the retainer 3 side, and an annular groove 4 and an air supply hole 5 are provided approximately in the center of this labyrinth part 3c.
This shows another embodiment of the present invention, in which the other embodiments are the same as the previous embodiment shown in FIG. 2, and the effects are also the same.
以上述べたように、この発明によれば、高速で回転する
回転帯の外周面、又は回転軸を若干の環状間隙を設けて
保持するリティナの内周面にラビリンス部を設け、リテ
イナ内周面にシール用空気゛全供給する環状溝を設けて
この環状溝底面に、オイル室と連通する断面積の極めて
小さいオ、イル通路全設けたので、環状ｉに溜ったオイ
ルはシール用空気によってオイル通路を通ってオイル室
内に押し戻され、外部への漏洩を完全に防止し得る優れ
た効果を有する。As described above, according to the present invention, the labyrinth portion is provided on the outer circumferential surface of the rotating band rotating at high speed or on the inner circumferential surface of the retainer that holds the rotating shaft with a slight annular gap, and the labyrinth portion is provided on the inner circumferential surface of the retainer. An annular groove that completely supplies sealing air is provided in the annular groove, and an oil passage with an extremely small cross-sectional area that communicates with the oil chamber is provided at the bottom of this annular groove, so that the oil accumulated in the annular groove is removed by the sealing air. The oil is pushed back into the oil chamber through the passage, and has the excellent effect of completely preventing leakage to the outside.
第１図は、従来のラビリンスシール構造の一例を示す断
面図、
第２図は、この発明の実施例を示す第１図と同様々断面
図、
第３図は、この発明の他の実施例を示す第１図と同様な
断面図である。
１・・・回転＠ ２・・・ラビリンスシール３
・・・リティナ ４゛・・環状溝５・・・空気供
給孔 ６・・・オイル室７・・・空気室
９・・・オイル通路第１図
第２図FIG. 1 is a sectional view showing an example of a conventional labyrinth seal structure, FIG. 2 is a sectional view similar to FIG. 1 showing an embodiment of the present invention, and FIG. 3 is another embodiment of the present invention. FIG. 2 is a sectional view similar to FIG. 1... Rotation @ 2... Labyrinth seal 3
... Retina 4゛ ... Annular groove 5 ... Air supply hole 6 ... Oil chamber 7 ... Air chamber
9...Oil passage Figure 1 Figure 2
Claims (1)
するリテイナの内周回との間にラビリンスシールを設け
、前記リテイナ内周面の軸方向のほぼ中央に環状溝を設
けてこの環状溝にシール用空気を供給す−る空気供給孔
を設けると共に、前記環状溝の底面に、この環状溝とオ
イル室とを連通するオイル通路を設け、このオイル通路
の断面積を前記ラビリンスシールとリテイナの間に形成
される環状間隙の断面積より小さくしたことを特徴とす
るラビリンスシール構造。1. A labyrinth seal is provided between the outer circumferential surface of a rotating shaft that rotates at high speed and the inner circumference of a retainer that holds this rotating shaft, and an annular groove is provided approximately at the center of the inner circumferential surface of the retainer in the axial direction. An air supply hole is provided for supplying sealing air to the annular groove, and an oil passage is provided at the bottom of the annular groove to communicate the annular groove and the oil chamber, and the cross-sectional area of this oil passage is set to the area between the labyrinth seal and the retainer. A labyrinth seal structure characterized by having a cross-sectional area smaller than the annular gap formed between the labyrinth seals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18222581A JPS5884269A (en) | 1981-11-16 | 1981-11-16 | Labyrinth seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18222581A JPS5884269A (en) | 1981-11-16 | 1981-11-16 | Labyrinth seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5884269A true JPS5884269A (en) | 1983-05-20 |
Family
ID=16114523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18222581A Pending JPS5884269A (en) | 1981-11-16 | 1981-11-16 | Labyrinth seal structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5884269A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5161943A (en) * | 1991-03-11 | 1992-11-10 | Dresser-Rand Company, A General Partnership | Swirl control labyrinth seal |
| US5190440A (en) * | 1991-03-11 | 1993-03-02 | Dresser-Rand Company | Swirl control labyrinth seal |
| WO2005068339A1 (en) * | 2004-01-20 | 2005-07-28 | Kone Corporation | Device for sealing escalator or moving pavement drives |
| ES2294885A1 (en) * | 2005-04-15 | 2008-04-01 | GAMESA INNOVATION & TECHNOLOGY, S.L. | Watertight joint for a gearbox |
| JP2008255798A (en) * | 2007-03-30 | 2008-10-23 | Anest Iwata Corp | Method and device for sealing rotor shaft seal of oil-free rotary compressor |
| WO2010051959A1 (en) * | 2008-11-04 | 2010-05-14 | Voith Patent Gmbh | Device for sealing a bearing lubricated with a liquid lubricant |
| CN102062198A (en) * | 2009-11-13 | 2011-05-18 | 中国北车集团大同电力机车有限责任公司 | High-speed driven gearbox device of railway vehicle |
-
1981
- 1981-11-16 JP JP18222581A patent/JPS5884269A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5161943A (en) * | 1991-03-11 | 1992-11-10 | Dresser-Rand Company, A General Partnership | Swirl control labyrinth seal |
| US5190440A (en) * | 1991-03-11 | 1993-03-02 | Dresser-Rand Company | Swirl control labyrinth seal |
| WO2005068339A1 (en) * | 2004-01-20 | 2005-07-28 | Kone Corporation | Device for sealing escalator or moving pavement drives |
| US7992684B2 (en) | 2004-01-20 | 2011-08-09 | Kone Corporation | Device for sealing escalator or moving walkway drives |
| ES2294885A1 (en) * | 2005-04-15 | 2008-04-01 | GAMESA INNOVATION & TECHNOLOGY, S.L. | Watertight joint for a gearbox |
| JP2008255798A (en) * | 2007-03-30 | 2008-10-23 | Anest Iwata Corp | Method and device for sealing rotor shaft seal of oil-free rotary compressor |
| WO2010051959A1 (en) * | 2008-11-04 | 2010-05-14 | Voith Patent Gmbh | Device for sealing a bearing lubricated with a liquid lubricant |
| CN102203444A (en) * | 2008-11-04 | 2011-09-28 | 沃依特专利有限责任公司 | Device for sealing a bearing lubricated with a liquid lubricant |
| JP2012507668A (en) * | 2008-11-04 | 2012-03-29 | フォイト・パテント・ゲーエムベーハー | Device for sealing a lubricated bearing assembly using liquid lubricant |
| CN102062198A (en) * | 2009-11-13 | 2011-05-18 | 中国北车集团大同电力机车有限责任公司 | High-speed driven gearbox device of railway vehicle |
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