JPH0752478Y2 - Air / oil lubricator - Google Patents
Air / oil lubricatorInfo
- Publication number
- JPH0752478Y2 JPH0752478Y2 JP1989081999U JP8199989U JPH0752478Y2 JP H0752478 Y2 JPH0752478 Y2 JP H0752478Y2 JP 1989081999 U JP1989081999 U JP 1989081999U JP 8199989 U JP8199989 U JP 8199989U JP H0752478 Y2 JPH0752478 Y2 JP H0752478Y2
- Authority
- JP
- Japan
- Prior art keywords
- air
- oil
- lubricating oil
- bearing
- compressed air
- 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
- Auxiliary Devices For Machine Tools (AREA)
- Rolling Contact Bearings (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 この考案は、高速回転軸受の潤滑に使用されるエア・オ
イル潤滑装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an air / oil lubrication device used for lubrication of a high-speed rotary bearing.
工作機械の主軸スピンドルのように高速で回転する部分
に使用される軸受には、エア・オイル潤滑が採用される
ようになってきている。エア・オイル潤滑は微小油量潤
滑とも呼ばれ、実公昭63−14156号公報にその一例が記
載されている。Air-oil lubrication is being adopted for bearings used in parts that rotate at high speed, such as the main spindle of machine tools. Air-oil lubrication is also called minute oil amount lubrication, and an example thereof is described in Japanese Utility Model Publication No. 63-14156.
エア・オイル潤滑は必要最小限の潤滑油を軸受ごとに最
適間隔で正確に計量して送り出し、第２図に示すように
エアオイルラインを通じて圧縮空気で運び、ノズルから
連続的に圧送する。潤滑油を微量の液体の状態で軸受に
供給するから、グリース潤滑や、ジェット潤滑に比べ
て、摩擦損失や攪拌熱が少なく、軸受温度上昇を低く抑
えることが出来高速回転に適している。エアオイル潤滑
と同様に微小油量を供給するオイルミスト潤滑がある
が、この潤滑法は装置のまわりにミストが充満するた
め、環境汚染の問題がある。In air-oil lubrication, the minimum necessary lubricating oil is accurately measured and sent out at optimum intervals for each bearing, and is carried by compressed air through an air-oil line as shown in FIG. 2, and continuously pumped from a nozzle. Lubricating oil is supplied to the bearing in the form of a small amount of liquid, so it has less friction loss and agitation heat than grease lubrication and jet lubrication, and can keep bearing temperature rise low, making it suitable for high-speed rotation. Similar to air-oil lubrication, there is oil mist lubrication that supplies a small amount of oil, but this lubrication method has a problem of environmental pollution because mist is filled around the device.
工作機械の主軸スピンドルの場合、第２図に示すような
アンギュラ玉軸受がよく使用され、回転精度と剛性を確
保するため、軸受は予圧を与えた状態で使用される。In the case of the main spindle of a machine tool, an angular ball bearing as shown in Fig. 2 is often used, and the bearing is used in a preloaded state in order to ensure rotation accuracy and rigidity.
ところが、最近高速化の傾向が一段と高くなっており
の、そのため、高速機では過予圧の対策が必要である。
軸受に過予圧がかからないようにするため種々の予圧調
整機構が考えられているが、予圧調整機構を採用すると
軸受まわりの構造が複雑になるという欠点がある。However, recently, the tendency toward higher speed has become much higher, and therefore, it is necessary to take measures against excessive preload in high-speed machines.
Various preload adjusting mechanisms have been considered in order to prevent the bearing from being overloaded, but the use of the preload adjusting mechanism has a drawback in that the structure around the bearing becomes complicated.
高速域で過大予圧がかかる原因として回転に伴う発熱が
考えられることから、この考案は、軸受の温度上昇を抑
えるのに役立つエア・オイル潤滑装置を提供することを
目的とする。Since heat generation due to rotation is considered to be a cause of applying excessive preload in the high speed range, the present invention aims to provide an air-oil lubrication device that helps suppress the temperature rise of the bearing.
この考案は、圧縮空気で微量の潤滑油を運び、その潤滑
油を圧縮空気と共にノズルから軸受に向けて噴射するよ
うにしたエア・オイル潤滑装置のエアラインにボルテッ
クス・チューブを設け、冷却された圧縮空気と潤滑油か
らなるエア・オイルを外輪と保持器との間、および、内
輪に向けて噴出させるようにしたものである。This device is a vortex tube provided in the air line of an air / oil lubrication device in which a small amount of lubricating oil is carried by compressed air and the lubricating oil is jetted from the nozzle toward the bearing together with the compressed air. Air / oil consisting of compressed air and lubricating oil is ejected between the outer ring and the cage and toward the inner ring.
エア源からの圧縮空気を空気冷却器により冷却し、この
冷却された圧縮空気で潤滑油を運び、そのままノズルか
ら軸受に吹きつけて潤滑と同時に冷却作用を行わせる。Compressed air from an air source is cooled by an air cooler, and the cooled compressed air conveys lubricating oil and blows it directly from a nozzle onto a bearing to simultaneously perform lubrication and cooling.
従来のエア・オイル潤滑装置における圧縮空気の働きは
専ら潤滑油を運ぶことにあったが、この考案は、積極的
に冷媒作用を担わせたものである。The function of the compressed air in the conventional air-oil lubrication device has been to carry the lubricating oil exclusively, but this invention positively bears the refrigerant action.
空気冷却器としてボルテックス・チューブを利用するこ
とにより、一例として、給気温度15℃の空気が、2kgf/c
m2の給気圧力とき、５℃で取り出せる。なお、通常のエ
ア・オイル潤滑で使用される空気の場合、給気温度は常
温、つまり、10〜20℃、給気圧力は2kgf/cm2が標準であ
る。By using a vortex tube as an air cooler, as an example, the air with a supply temperature of 15 ° C is 2 kgf / c.
It can be taken out at 5 ° C when the supply pressure is m 2 . In the case of air used for normal air-oil lubrication, the standard air supply temperature is room temperature, that is, 10 to 20 ° C, and the air supply pressure is 2 kgf / cm 2 .
この考案の実施例を示す第１図に従って説明すると、エ
ア・オイル潤滑装置はオイルライン（８）と、エアライ
ン（14）と、エアオイルライン（16）とを含んでいる。Referring to FIG. 1 showing an embodiment of the present invention, an air / oil lubrication device includes an oil line (8), an air line (14) and an air oil line (16).
オイルライン（８）は、ポンプ（２）の作用でオイルタ
ンク（４）から取り出した潤滑油をミキシングバルブ
（６）へ導く。ポンプ（２）はプランジャポンプを採用
してそのストローク量で潤滑油の吐出量を決め、１回の
吐出量を例えば0.01ccから0.03ccまで無段階に設定でき
るようにする。オイルタンク（４）はレベルスイッチを
具備し、潤滑油の保有量が不足すると警報を発する。The oil line (8) guides the lubricating oil taken out from the oil tank (4) to the mixing valve (6) by the action of the pump (2). The pump (2) adopts a plunger pump, and determines the discharge amount of the lubricating oil by the stroke amount thereof, so that one discharge amount can be set steplessly from 0.01cc to 0.03cc. The oil tank (4) is equipped with a level switch and gives an alarm when the amount of lubricating oil held is insufficient.
エアライン（14）は、エア源（10）からエアフィルタ
（12）を介して供給される圧縮空気をミキシングバルブ
（６）へ導く。エアフィルタ（12）の下流側に空気冷却
器（22）を接続してある。エアライン（14）には、その
他、供給エア圧が何等かの理由で低下した場合に異常を
知らせるための圧力スイッチや、供給エアに混在してい
るミストを除去するためのミストセパレータなどを必要
に応じて設ける。The air line (14) guides the compressed air supplied from the air source (10) through the air filter (12) to the mixing valve (6). An air cooler (22) is connected to the downstream side of the air filter (12). In addition to the air line (14), a pressure switch is required to notify the abnormality when the supply air pressure drops for some reason, and a mist separator to remove mist mixed in the supply air. Set according to.
ポンプ（２）からオイルライン（８）を介して送られて
くる微量かつ定量ずつの潤滑油は、ミキシングバルブ
（６）にて、エアライン（14）からの空気流の中に供給
される。そうして、エアライン（16）中を空気流によっ
て潤滑油が運ばれ、エアオイルライン（16）の末端のノ
ズル（18）から軸受（20）に向かって噴射される（第２
図参照）。これにより、軸受（20）は、適量の潤滑油に
よる潤滑作用と、冷却空気による冷却作用とを同時に受
けることとなる。A small amount and a fixed amount of lubricating oil sent from the pump (2) through the oil line (8) are supplied into the air flow from the air line (14) by the mixing valve (6). Then, the lubricating oil is carried in the air line (16) by the air flow and is injected from the nozzle (18) at the end of the air oil line (16) toward the bearing (20) (second
See figure). As a result, the bearing (20) is simultaneously subjected to the lubricating action of the appropriate amount of lubricating oil and the cooling action of the cooling air.
ノズル（18）は、図示するように少なくとも２個所、す
なわち、外輪と保持器との間、および、内輪に向けて、
エアオイルを噴出させるように配置するのが好ましい。
これにより、冷却された圧縮空気を内輪に直接当てて内
・外輪の温度差を極小に保つことができ、併せて、高速
回転時の発熱および熱膨張を抑えて遠心力の作用が大き
くなるのを防止することができるので、単に軸受を冷却
する以上の効果が得られる。The nozzle (18) has at least two positions as shown in the drawing, that is, between the outer ring and the cage and toward the inner ring,
It is preferable to arrange so as to eject the air oil.
As a result, the cooled compressed air can be directly applied to the inner ring to keep the temperature difference between the inner and outer rings to a minimum, and at the same time, the heat generation and thermal expansion during high-speed rotation can be suppressed to increase the centrifugal force. Since it is possible to prevent the above, it is possible to obtain an effect more than simply cooling the bearing.
ボルテックス・チューブはボルテックスの原理を応用し
たもので、管の中央の供給口から給気するようにし、空
気の一端がオルフィス、もう一端がうず状にすきまのあ
る管内の外周部をうず状に回ると、管内中央部に超高速
のうず巻ができる。この回転は約50万rpmとなり、中央
部と外周部との間に大きな圧力差を生じ、中心へ向かっ
て空気の移動が行われ膨張により温度が下がり中央部に
発生した冷却空気はオルフィスより流れうず状になり吹
出口より放出される。発生した熱は他方の排熱口から排
出される。The vortex tube is an application of the vortex principle. Air is supplied from the supply port in the center of the tube, and one end of the air turns to Orphis and the other end vortexes around the outer circumference of the tube with a vortex gap. Then, a super-high speed spiral winding can be formed in the central part of the pipe. This rotation is about 500,000 rpm, a large pressure difference is generated between the central part and the outer peripheral part, the air is moved toward the center and the temperature drops due to expansion, and the cooling air generated in the central part flows from Orphis. It becomes a vortex and is discharged from the outlet. The generated heat is discharged from the other heat exhaust port.
以上説明したように、この考案によれば、エア・オイル
潤滑に不可欠の空気を冷却することによって、従来専ら
潤滑油を運ぶために使用されていたこの空気に、同時に
軸受の冷却作用をも行わせるようにしたから、特に高速
回転の軸受の場合に温度上昇を極力抑えて過大予圧によ
る不具合を未然に防止することができる。As described above, according to the present invention, by cooling the air that is indispensable for air / oil lubrication, the air that has been conventionally used exclusively for carrying lubricating oil also has a bearing cooling action. Therefore, particularly in the case of a high-speed rotating bearing, it is possible to suppress the temperature rise as much as possible and prevent problems due to excessive preload.
また、ボルテックス・チューブを採用することにより、
電気や冷媒等を一切用いることなく冷却空気が得られる
ので、他の冷却装置を使用するのに比べてランニングコ
ストが非常に少なくて済む。さらに、ボルテックス・チ
ューブは既存のエアラインに簡単に取り付けられるの
で、この考案は容易に実施することができるのみなら
ず、予圧調整機構を設ける場合のように徒らに構造を複
雑にするといった問題もない。Also, by adopting a vortex tube,
Since the cooling air can be obtained without using any electricity or refrigerant, the running cost can be very low as compared with the case of using other cooling devices. Furthermore, since the vortex tube can be easily attached to the existing airline, the present invention is not only easy to carry out, but also has the problem of complicating the structure such as when the preload adjusting mechanism is provided. Nor.
第１図はエア・オイル潤滑装置の系統図、 第２図は工作機械の主軸スピンドルの断面図である。 8:オイルライン 14:エアライン 16:エアオイルライン 22:空気冷却器。 FIG. 1 is a system diagram of an air-oil lubricator, and FIG. 2 is a sectional view of a spindle spindle of a machine tool. 8: Oil line 14: Air line 16: Air oil line 22: Air cooler.
Claims (1)
油を圧縮空気と共にノズルから軸受に向けて噴射するよ
うにしたものにおいて、圧縮空気を供給するエアライン
にボルテックス・チューブを設け、冷却された圧縮空気
と潤滑油からなるエア・オイルを外輪と保持器との間、
および、内輪に向けて噴出させるようにしたエア・オイ
ル潤滑装置。1. A compressed air carrying a small amount of lubricating oil and injecting the lubricating oil together with the compressed air from a nozzle toward a bearing, a vortex tube is provided in an air line for supplying the compressed air, Air oil consisting of cooled compressed air and lubricating oil is put between the outer ring and the cage,
Also, an air-oil lubrication device designed to eject toward the inner ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989081999U JPH0752478Y2 (en) | 1989-07-11 | 1989-07-11 | Air / oil lubricator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989081999U JPH0752478Y2 (en) | 1989-07-11 | 1989-07-11 | Air / oil lubricator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0320796U JPH0320796U (en) | 1991-02-28 |
| JPH0752478Y2 true JPH0752478Y2 (en) | 1995-11-29 |
Family
ID=31628426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989081999U Expired - Lifetime JPH0752478Y2 (en) | 1989-07-11 | 1989-07-11 | Air / oil lubricator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0752478Y2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53123608U (en) * | 1977-03-11 | 1978-10-02 |
-
1989
- 1989-07-11 JP JP1989081999U patent/JPH0752478Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0320796U (en) | 1991-02-28 |
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