JPS6134580B2 - - Google Patents
Info
- Publication number
- JPS6134580B2 JPS6134580B2 JP53134532A JP13453278A JPS6134580B2 JP S6134580 B2 JPS6134580 B2 JP S6134580B2 JP 53134532 A JP53134532 A JP 53134532A JP 13453278 A JP13453278 A JP 13453278A JP S6134580 B2 JPS6134580 B2 JP S6134580B2
- Authority
- JP
- Japan
- Prior art keywords
- oil
- working chamber
- seal
- shaft sealing
- shaft
- 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
Links
- 238000007789 sealing Methods 0.000 claims description 19
- 239000012530 fluid Substances 0.000 claims description 12
- 238000005086 pumping Methods 0.000 claims description 3
- 239000003595 mist Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Compressor (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
- Sealing Of Bearings (AREA)
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は流体機械、特にドライタイプのスクリ
ユー圧縮機およびターボ圧縮機などのように、作
動室の圧力が大気圧以下になることがあるガス流
体機械の油切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 is applicable to fluid machines, particularly gas fluids where the pressure in the working chamber may be below atmospheric pressure, such as dry type screw compressors and turbo compressors. This relates to oil draining devices for machines.
実公昭52−21417号公報には、軸度を潤滑した
後の油が作動室に侵入しないようにするため、２
箇所に油切り装置を配置することが開示されてい
る。この油切り装置は、回転軸に対向するケーシ
ング内周面（油切り部）に、ねじシールまたはラ
ビリンスシールを設置したものである。
In Japanese Utility Model Publication No. 52-21417, in order to prevent oil from entering the working chamber after lubricating the axis, 2
It is disclosed that an oil draining device is arranged at the location. This oil draining device has a threaded seal or a labyrinth seal installed on the inner circumferential surface of the casing (oil draining portion) facing the rotating shaft.
ねじシールはらせん状のねじ溝を有するもの
で、回転軸の回転方向が定まれば、シール能力が
発揮されるのは、ガスが正方向に流れる（漏れ
る）場合だけであり、逆方向の流れの場合はシー
ル能力が発揮されないばかりでなく流れ（漏れ）
を助長することになる。また、ラビリンスシール
はラビリンスシールの両側の圧力差が同じであれ
ば、ガスが正方向に流れる（漏れる）場合および
逆方向に流れる場合の何れも同程度のシール能力
を発揮する。 A screw seal has a spiral thread groove, and once the direction of rotation of the rotating shaft is determined, the sealing ability is demonstrated only when gas flows (leak) in the forward direction, and when gas flows in the opposite direction. In the case of
This will encourage Furthermore, if the pressure difference on both sides of the labyrinth seal is the same, the labyrinth seal exhibits the same degree of sealing ability whether gas flows in the forward direction (leakage) or in the reverse direction.
ねじシール、ラビリンスシールは、前記のよう
な特性をもつている上、流体機械の作動室の圧力
は、圧縮運転時は大気圧より高く、吸い込み量を
絞つて風量調整を行なつたときは大気圧より低く
なり、ラビリンスシール内のガスの流れ（漏れ）
方向が正反対であるため、前記従来例のように２
箇所の油切り装置を、ともにねじシールで構成す
ると、風量調整を行なつたときのように作動室の
圧力が、大気圧より低くなつた場合シールができ
なくなり、油ミストを含んだガスが作動室に侵入
する。また、２箇所の油切り装置を、ともにラビ
リンスシールで構成すると、ガスの流れ方向が正
方向、逆方向の何れでもシール能力は発揮される
が、ラビリンスシールは、ガスが狭い隙間を通つ
て広い空間に流出したときの圧力降下を利用する
もので、ガスの流れすなわちガスの洩れを伴うも
のであるから２箇所の油切り装置間に、油ミスト
を含んだガスが充満することになり、前記のよう
に作動室の圧力が大気圧より低くなつた場合、油
ミストを含んだガスが作動室に侵入してしまう。 Screw seals and labyrinth seals have the above-mentioned characteristics, and the pressure in the working chamber of a fluid machine is higher than atmospheric pressure during compression operation, and when the air volume is adjusted by reducing the suction volume, the pressure in the working chamber of a fluid machine is higher than atmospheric pressure. Gas flow (leakage) within the labyrinth seal as the atmospheric pressure becomes lower
Since the directions are exactly opposite, 2
If the oil drain device in both locations is configured with screw seals, if the pressure in the operating chamber drops below atmospheric pressure, such as when adjusting the air volume, the seal will no longer be able to be applied, and gas containing oil mist will be activated. break into the room. In addition, if the two oil drainage devices are both configured with labyrinth seals, the sealing ability will be demonstrated regardless of whether the gas flow direction is in the forward or reverse direction. This method utilizes the pressure drop when it flows out into the space, and because it involves a gas flow, that is, a gas leak, the space between the two oil removal devices will be filled with gas containing oil mist. When the pressure in the working chamber becomes lower than atmospheric pressure, as in the case of , gas containing oil mist enters the working chamber.
本発明の目的は、簡単な構成によつて流体機械
の作動室に油分が侵入するのを阻止できる流体機
械の油切装置を提供することにある。
An object of the present invention is to provide an oil draining device for a fluid machine that can prevent oil from entering the working chamber of the fluid machine with a simple configuration.
本発明の特徴は、軸封装置を、ガスが作動室か
ら流れ出す場合および作動室に向かつて流れ込む
場合のシール能力が同程度となるシールで構成
し、油切り装置を、軸受装置に向かつてポンプ作
用を発揮するねじシールと、このねじシールと軸
受装置との間に配置されたじやま板とにより構成
し、前記軸封装置と油切り装置との間に排気孔を
有するものである。
A feature of the present invention is that the shaft seal device is configured with a seal that has the same sealing ability when gas flows out of the working chamber and when gas flows toward the working chamber, and the oil drain device is configured with a seal that has the same sealing ability when gas flows out from the working chamber and when gas flows toward the working chamber, It is composed of a threaded seal that exerts its action and a baffle plate that is disposed between the threaded seal and the bearing device, and has an exhaust hole between the shaft sealing device and the oil draining device.
上記の構成であるから、油切り装置は、常に軸
受装置に向かつてポンプ作用を発揮するので、油
ミストを含んだガスが軸封装置側に流出するのを
阻止し軸封装置と油切り装置との間に油ミストが
ない状態とするとともに、軸封装置は、ガスが作
動室から流れ出す場合および作動室に向かつて流
れ込む場合の何れでもシール能力が維持されるの
で、吸い込み量を絞つて風量調整を行なつたとき
のように作動室の圧力が大気圧より低くなつた場
合も油ミストを含んだガスの侵入を阻止できる。 With the above configuration, the oil draining device always exerts a pumping action toward the bearing device, thereby preventing gas containing oil mist from flowing toward the shaft sealing device. In addition to ensuring that there is no oil mist between Even when the pressure in the working chamber becomes lower than atmospheric pressure, such as during adjustment, it is possible to prevent gas containing oil mist from entering.
以下本発明の一実施例を図面により説明する。
図に示すように、作動室１内に収納されたスクリ
ユーロータ２の駆動により空気を圧縮する仕事を
行う。そのスクリユーロータ２の回転軸３は軸受
装置４により回転自在に支持されており、この軸
受装置４と作動室１の間に軸封装置５を設け、こ
れによつて作動室１から圧縮空気が漏洩するのを
防止している。
An embodiment of the present invention will be described below with reference to the drawings.
As shown in the figure, a screw rotor 2 housed in a working chamber 1 is driven to compress air. The rotating shaft 3 of the screw rotor 2 is rotatably supported by a bearing device 4, and a shaft sealing device 5 is provided between the bearing device 4 and the working chamber 1. is prevented from leaking.
上記作動室１に油が流入するのは許されず、か
つ回転軸３は高回転数であるため、軸封装置５と
しては通常、非接触形のラビリンスシール５ａが
用いられ、このラビリンスシール５ａは、該ラビ
リンスシール５ａの両側の圧力差が同じであれ
ば、ガスが正方向に流れる（漏れる）場合および
逆方向に流れる場合の何れでも同程度のシール能
力を発揮する。ラビリンスシール５ａから少量の
漏洩空気を逃がすために排気孔６が設けられてい
る。この排気孔６と軸受装置４の間には、油切装
置７が設置されている。 Since oil is not allowed to flow into the working chamber 1 and the rotational speed of the rotating shaft 3 is high, a non-contact type labyrinth seal 5a is normally used as the shaft sealing device 5. If the pressure difference on both sides of the labyrinth seal 5a is the same, the sealing ability will be the same whether the gas flows in the forward direction (leakage) or in the reverse direction. An exhaust hole 6 is provided to allow a small amount of leaked air to escape from the labyrinth seal 5a. An oil drain device 7 is installed between the exhaust hole 6 and the bearing device 4.
この油切装置７は、じやま板８、飛散板９、油
だめ室１１およびシヤフト３に設けられたねじシ
ール１３により構成されている。 The oil draining device 7 includes a stop plate 8, a scattering plate 9, an oil sump chamber 11, and a screw seal 13 provided on the shaft 3.
じやま板８は、軸封装置５と一体または別個に
製作され、飛散板９は回転軸３に嵌合固定されて
いる。また、飛散板９は、ねじシール１３寄りじ
やま板８は軸受装置４寄りの位置すなわちじやま
板８の奥の方に配置されている。 The jamming plate 8 is manufactured integrally with the shaft sealing device 5 or separately, and the scattering plate 9 is fitted and fixed to the rotating shaft 3. Further, the scattering plate 9 is disposed closer to the screw seal 13 and the deflection plate 8 is located closer to the bearing device 4, that is, at the back of the deflection plate 8.
本実施例は上記のような構造からなるので、シ
ヤフト３が実線矢印１５に示すように時計方向に
回転すると、ねじシール１３はポンプ作用を発揮
し、空気は破線矢印１６の方向に流れる。もし作
動室１の圧力が大気圧以下になると、排気孔６よ
り空気が吸込まれるが、油だめ室１１の圧力が大
気圧以上になるようにねじシール１３を設計すれ
ば、作動室１の圧力の如何にかかわらずねじシー
ル１３により空気を破線矢印１６の方向に流すこ
とができる。したがつて油だめ室１１内に浮遊し
ている油ミストを空気と共に排油孔１２から排出
することができる。そのため軸封装置と油切り装
置との間に形成されている排気孔６には、油ミス
トがない状態にしたうえ、さらに軸封装置によつ
て作動室への空気の侵入を押えているので、作動
室圧力が大気圧より低くなつても油ミストを含ん
だ空気が作動室に侵入するのを阻止できる。 Since this embodiment has the above-described structure, when the shaft 3 rotates clockwise as shown by the solid arrow 15, the screw seal 13 exerts a pumping action and air flows in the direction of the broken arrow 16. If the pressure in the working chamber 1 falls below atmospheric pressure, air will be sucked in through the exhaust hole 6, but if the screw seal 13 is designed so that the pressure in the oil sump chamber 11 is above atmospheric pressure, then the pressure in the working chamber 1 will be Regardless of the pressure, the threaded seal 13 allows air to flow in the direction of the dashed arrow 16. Therefore, the oil mist floating in the oil sump chamber 11 can be discharged from the oil drain hole 12 together with air. Therefore, the exhaust hole 6 formed between the shaft sealing device and the oil draining device is kept free of oil mist, and the shaft sealing device prevents air from entering the working chamber. Even if the working chamber pressure becomes lower than atmospheric pressure, air containing oil mist can be prevented from entering the working chamber.
また、給油ノズルから軸受装置４に供給された
油、油ミストは、ねじシール１３の方向に流れじ
やま板８に衝突して排油孔１２から排出される。 Further, the oil and oil mist supplied to the bearing device 4 from the oil supply nozzle flow in the direction of the screw seal 13 and collide with the baffle plate 8, and are discharged from the oil drain hole 12.
さらに、回転軸３に付着した油ミストか、飛散
板９にから遠心力によつて飛散され、油だめ室１
１にたまり、油だめ室１１から細孔（図示せず）
を経由して排油孔１２に流れる。 Furthermore, the oil mist adhering to the rotating shaft 3 is scattered by the centrifugal force from the scattering plate 9, and
1 and from the oil sump chamber 11 to the pores (not shown)
The oil flows to the drain hole 12 via the oil drain hole 12.
上記実施例では回転軸３側にねじシール１３を
設けたが、これに代り穴１４側にねじシールを設
けても同様な作用および効果を得ることができ
る。またドライタイプのスクリユー圧縮機に限定
されず、ターボ圧縮機およびその他のオイルフリ
ー回転形流体機械の油切装置にも適用可能であ
る。 In the above embodiment, the threaded seal 13 was provided on the rotating shaft 3 side, but the same operation and effect can be obtained by providing a threaded seal on the hole 14 side instead. Further, the present invention is not limited to dry type screw compressors, but can also be applied to oil drain devices for turbo compressors and other oil-free rotary fluid machines.
以上説明したように本発明によれば簡単な構成
によつて、作動室への油の侵入を阻止できる油切
装置を提供できる。
As explained above, according to the present invention, it is possible to provide an oil cutter that can prevent oil from entering the working chamber with a simple configuration.
図は本発明に係わる流体機械の油切装置の一実
施例を示す断面図である。
１……作動室、４……軸受装置、５……軸封装
置、６……排気孔、７……油切装置、８……じや
ま板、９……飛散板、１２……排油孔、１３……
ねじシール。
The figure is a sectional view showing an embodiment of an oil draining device for a fluid machine according to the present invention. 1... Working chamber, 4... Bearing device, 5... Shaft sealing device, 6... Exhaust hole, 7... Oil draining device, 8... Boundary plate, 9... Scattering plate, 12... Oil drain Hole, 13...
screw seal.
Claims (1)
する軸受装置との間に、作動室寄りの位置に軸封
装置、軸受装置寄りの位置に油切り装置が配置さ
れ、運転時、前記作動室の圧力が大気圧より高い
状態から低い状態の範囲で変化するものにおい
て、前記軸封装置は、ガスが作動室から流れ出す
場合およびガスが作動室に向かつて流れ込む場合
におけるシール能力が同程度のシールで構成さ
れ、前記油切り装置は、軸受装置に向かつてポン
プ作用を発揮するねじシールおよびこのねじシー
ルと軸受装置との間に配置されたじやま板で構成
されているとともに、前記軸封装置と前記油切り
装置との間に形成された排気孔を有することを特
徴とする流体機械の油切装置。 ２ 特許請求の範囲第１項において、回転軸に嵌
合された飛散板を有し、この飛散板は、前記油切
り装置のじやま板とねじシールとの間の位置に設
置されている流体機械の油切装置。[Claims] 1. Between the working chamber of the fluid machine and the bearing device that supports the rotating shaft of the fluid machine, a shaft sealing device is arranged at a position closer to the working chamber, and an oil draining device is arranged at a position closer to the bearing device. , when the pressure in the working chamber changes in a range from higher to lower than atmospheric pressure during operation, the shaft sealing device is configured to prevent gas from flowing out of the working chamber and when gas flowing toward the working chamber. The oil draining device is composed of seals having the same sealing capacity, and the oil draining device is composed of a threaded seal that exerts a pumping action toward the bearing device, and a shim plate that is arranged between the threaded seal and the bearing device. An oil cutting device for a fluid machine, characterized in that the shaft sealing device and the oil cutting device have an exhaust hole formed between the shaft sealing device and the oil cutting device. 2. In claim 1, there is provided a scattering plate fitted to the rotating shaft, and the scattering plate is arranged to displace the fluid at a position between the sill plate and the threaded seal of the oil draining device. Mechanical oil drain device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13453278A JPS5564172A (en) | 1978-11-02 | 1978-11-02 | Oil thrower for hydraulic machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13453278A JPS5564172A (en) | 1978-11-02 | 1978-11-02 | Oil thrower for hydraulic machinery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5564172A JPS5564172A (en) | 1980-05-14 |
| JPS6134580B2 true JPS6134580B2 (en) | 1986-08-08 |
Family
ID=15130514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13453278A Granted JPS5564172A (en) | 1978-11-02 | 1978-11-02 | Oil thrower for hydraulic machinery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5564172A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008194597A (en) * | 2007-02-09 | 2008-08-28 | Toyota Motor Corp | Rotary atomizing electrostatic coater |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5951190A (en) * | 1982-09-17 | 1984-03-24 | Hitachi Ltd | Oil thrower device of oil-free screw compressor |
| JPS6047794A (en) * | 1983-08-25 | 1985-03-15 | Sanshin Ind Co Ltd | Water intrusion preventing structure for vessel propulsion engine |
| JPH0234476Y2 (en) * | 1985-06-20 | 1990-09-17 | ||
| JPS62174592A (en) * | 1985-10-12 | 1987-07-31 | Kobe Steel Ltd | Screw type vacuum pump |
| JPS62261689A (en) * | 1986-05-09 | 1987-11-13 | Kobe Steel Ltd | Screw type vacuum pump |
| JPS63266193A (en) * | 1986-09-30 | 1988-11-02 | Jun Taga | Pump |
| JPH02124289U (en) * | 1989-03-24 | 1990-10-12 | ||
| JP4638582B2 (en) * | 2000-09-08 | 2011-02-23 | 北越工業株式会社 | Shaft seal structure of oil-free screw compressor |
| BE1013829A3 (en) * | 2000-11-09 | 2002-09-03 | Atlas Copco Airpower Nv | Method for sealing of an axle of a rotor of IN A COMPRESSOR ELEMENT AND SEAL used therein. |
| JP4747437B2 (en) * | 2001-05-08 | 2011-08-17 | 株式会社豊田自動織機 | Oil leakage prevention structure in vacuum pump |
| ITMO20010108A1 (en) * | 2001-05-29 | 2002-11-29 | Rossi Motoriduttori Spa | DYNAMIC SEALING DEVICE FOR REDUCER |
| GB2422880B (en) * | 2005-02-02 | 2009-11-25 | Schlumberger Holdings | Bearing arrangement |
| JP5348924B2 (en) * | 2008-04-09 | 2013-11-20 | 株式会社神戸製鋼所 | Screw fluid machine |
| CN101846171B (en) * | 2010-05-26 | 2012-08-22 | 中信大锰矿业有限责任公司 | Method for preventing oil leakage of worm gear reducer |
| ITCO20120019A1 (en) | 2012-04-27 | 2013-10-28 | Nuovo Pignone Srl | LABYRINTH HIGHLY DAMPENED SEALS WITH HELICOIDAL AND CYLINDRICAL-MIXED SHAPE |
| JP6751314B2 (en) * | 2016-06-24 | 2020-09-02 | 三菱重工サーマルシステムズ株式会社 | Open type compressor |
-
1978
- 1978-11-02 JP JP13453278A patent/JPS5564172A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008194597A (en) * | 2007-02-09 | 2008-08-28 | Toyota Motor Corp | Rotary atomizing electrostatic coater |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5564172A (en) | 1980-05-14 |
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