JP2580020B2 - Lubrication method for air compressor - Google Patents
Lubrication method for air compressorInfo
- Publication number
- JP2580020B2 JP2580020B2 JP63305905A JP30590588A JP2580020B2 JP 2580020 B2 JP2580020 B2 JP 2580020B2 JP 63305905 A JP63305905 A JP 63305905A JP 30590588 A JP30590588 A JP 30590588A JP 2580020 B2 JP2580020 B2 JP 2580020B2
- Authority
- JP
- Japan
- Prior art keywords
- oil
- air
- lubricating oil
- oil mist
- mist
- 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
- Rotary Pumps (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は自動車エンジン用過給機の様な空気圧縮機の
軸受・軸シール等の潤滑方法に関するものである。Description: TECHNICAL FIELD The present invention relates to a method for lubricating bearings and shaft seals of an air compressor such as a supercharger for an automobile engine.
（従来技術） 第２図は公知の圧縮機を示し、１はケーシングで４つ
の分割部分1a,1b,1c,1dで構成されている。２はケーシ
ング１内に軸支されたメスロータ、３は同じくオスロー
タである。メスロータ２は図示しないエンジンよりプー
リー４を介し駆動される。オスロータ３はメスロータ軸
に取付けた歯車5aからオスロータ軸に取付けた歯車5bを
介し駆動される。(Prior Art) FIG. 2 shows a known compressor, in which 1 is a casing composed of four divided parts 1a, 1b, 1c, 1d. Reference numeral 2 denotes a female rotor supported in the casing 1, and reference numeral 3 denotes a male rotor. The female rotor 2 is driven by a not-shown engine via a pulley 4. The male rotor 3 is driven from a gear 5a attached to the female rotor shaft via a gear 5b attached to the male rotor shaft.
吸入チャンバ８に入った空気はメス・オス両ロータ2,
3によって圧縮される。歯車5a,5b及び軸受6a,6cは潤滑
油９によって潤滑される。又軸受6b,6dは吸入チャンバ
８内の空気によって冷却される。スクリュー式の場合で
オスロータは約20,000rpm以上の回転数で回転する。The air that has entered the suction chamber 8 has both female and male rotors 2,
Compressed by three. The gears 5a, 5b and the bearings 6a, 6c are lubricated by a lubricating oil 9. The bearings 6b and 6d are cooled by the air in the suction chamber 8. In the case of the screw type, the male rotor rotates at a rotation speed of about 20,000 rpm or more.
さて、被圧縮空気は吐出部でかなり発熱する（例えば
吸入温度約40〜50℃の場合約150℃位になることもあ
る）。潤滑油９は通常鉱油系潤滑油が用いられるが、吐
出側が約150℃を超えると油が炭化し始めるので、油温
をなるべく下げる必要がある。そのためには、各部の動
力損失を成可く小さくし、ケーシング部からの放熱を成
可く大きくする必要がある。The compressed air generates a considerable amount of heat at the discharge section (for example, when the suction temperature is about 40 to 50 ° C., it may be about 150 ° C.). The lubricating oil 9 is usually a mineral oil-based lubricating oil, but if the discharge side exceeds about 150 ° C., the oil starts to carbonize, so the oil temperature must be lowered as much as possible. For that purpose, it is necessary to minimize the power loss of each part and to increase the heat radiation from the casing part.
一方、高速回転するので、軸受6a,6c、軸シール7a,7c
は摩擦によって発熱し、歯車5a,5bにはかみあい部の動
力損失及び潤滑油や空気の拡はん損失などがあり、これ
らの動力損失によって潤滑油が発熱する。On the other hand, because of high-speed rotation, bearings 6a, 6c, shaft seals 7a, 7c
Generates heat due to friction, and the gears 5a and 5b have a power loss at the meshing portion and a spreading loss of lubricating oil and air, and the lubricating oil generates heat due to these power losses.
これらの損失熱はケーシング１からの放熱や、吐出空
気温度の低い場合には吐出空気によっても持ち去られ
る。しかし、吐出圧力が高くなる様に設計されたもの
や、或いは吸入空気温度が高くてその結果吐出空気温度
が高くなる様な場合には、冷却効果が無くなり、場合に
よっては反対に軸受6a,6cと、シール7a,7cが吐出空気に
よって加熱されることにもなる。These heat losses are removed by the heat radiation from the casing 1 or by the discharge air when the discharge air temperature is low. However, when the discharge pressure is designed to be high, or when the intake air temperature is high and the discharge air temperature is high, the cooling effect is lost, and in some cases, the bearings 6a, 6c Then, the seals 7a and 7c are also heated by the discharged air.
ところで、油浴はねかけ式の場合には、高速軸受には
潤滑油が浸入しにくいので、潤滑や冷却が不十分になら
ざるを得ない。更には圧縮機の構造上シール部まで十分
な潤滑油が浸入しないなどの欠点がある。その結果、軸
受6a,6c、シール7a,7cの使用条件は過酷となり、軸受や
シールの寿命、耐久性が問題となる。特に吐出空気によ
って加熱される様に場合にはその危険性が大である。By the way, when the oil bath is of the splash type, lubricating oil does not easily enter the high-speed bearing, so that lubrication and cooling must be insufficient. Further, there is a disadvantage that sufficient lubricating oil does not penetrate to the seal portion due to the structure of the compressor. As a result, the operating conditions of the bearings 6a and 6c and the seals 7a and 7c become severe, and the life and durability of the bearings and seals become problems. In particular, the danger is great when heated by the discharge air.
（発明により解決しようとする課題） 自動車エンジン用過給機のように、潤滑に油浴はねか
け式給油方式を採用する空気圧縮機の軸受、軸シール等
の潤滑性能を改善し、これらの耐久性と信頼性との向上
を図ろうとするものである。(Problems to be Solved by the Invention) Like a supercharger for an automobile engine, the lubrication performance of a bearing, a shaft seal, etc. of an air compressor adopting an oil bath splashing type lubrication system for lubrication is improved. It is intended to improve durability and reliability.
（発明による課題の解決手段） ケーシング内にメスロータとオスロータを収納した空
気圧縮機において、被圧縮空気の一部を取出し、該取出
された圧縮空気をオイルミスト発生器の絞り部に導き、
絞り部に発生した負圧により潤滑油を吸い上げてオイル
ミスト化し、該オイルミストを空気吐出側の軸受部・シ
ール部及び歯車噛合部に供給して潤滑し、潤滑後の排出
ミストをオイルミスト分離器にて分離し、油分を回収可
能にした。(Means for Solving the Problems According to the Invention) In an air compressor in which a female rotor and a male rotor are housed in a casing, a part of compressed air is extracted, and the extracted compressed air is guided to a throttle section of an oil mist generator.
The lubricating oil is sucked up by the negative pressure generated in the throttle portion to form an oil mist, and the oil mist is supplied to the bearing / seal portion and the gear meshing portion on the air discharge side for lubrication. Separated in a vessel to make oil recoverable.
（実施例） 以下第１図に基いて説明する。なお第２図と共通する
部分については省略する。(Example) Hereinafter, description will be given based on FIG. Parts common to those in FIG. 2 are omitted.
第１図で10はオイルミスト発生器である。この発生器
10は絞り部10aを内部に備え、絞り部の片側は空気圧縮
機に設けた空気取出口20に空気供給管13を介し連結され
ている。絞り部10aの他の側はオイルミスト供給管14を
介しケーシング１に設けたオイルミスト供給口21a,21b,
21cに通じている。又絞り部10aは潤滑油供給管15を介
し、潤滑油タンク12内の潤滑油に通じている。In FIG. 1, reference numeral 10 denotes an oil mist generator. This generator
Numeral 10 has a throttle portion 10a inside, and one side of the throttle portion is connected to an air outlet 20 provided in the air compressor via an air supply pipe 13. The other side of the throttle portion 10a is connected to oil mist supply ports 21a, 21b, 21b provided in the casing 1 through an oil mist supply pipe 14.
Leads to 21c. The throttle portion 10a communicates with the lubricating oil in the lubricating oil tank 12 via a lubricating oil supply pipe 15.
11はオイルミスト分離器である。これはオイルミスト
排出管16を介してケーシング１のオイルミスト排出口22
に、又潤滑油戻し管17と逆流防止器19を介し潤滑油タン
ク12に通じている。18も潤滑油戻し管で、ケーシング１
と潤滑油タンク12に逆流防止器19を介し通じている。11 is an oil mist separator. This is connected to the oil mist outlet 22 of the casing 1 via the oil mist outlet pipe 16.
In addition, it communicates with the lubricating oil tank 12 via a lubricating oil return pipe 17 and a backflow preventer 19. 18 is also a lubricating oil return pipe, casing 1
And the lubricating oil tank 12 through a backflow preventer 19.
なお第１図では潤滑油タンク12が別置型の場合を示し
ているが、ケーシング１内のスペースをタンクとして用
いても構わない。又管として、ケーシング１内に設けた
孔を用いても勿論さしつかえない。Although FIG. 1 shows a case where the lubricating oil tank 12 is a separate type, the space in the casing 1 may be used as a tank. Of course, a hole provided in the casing 1 may be used as the pipe.
（作用） 今、圧縮機が定常運転の場合についてのべる。例え
ば、吸入空気温度が約40〜50℃であっても、吐出空気温
度が約150℃にもなっている場合を想定する。第２図の
従来の潤滑方式では油浴はねかけ式であるので、軸受6
a,6c、軸シール7a,7cには潤滑油が不足気味、従ってこ
れらの部品はもともと高速度な上、潤滑不足、高温雰囲
気という過酷な条件にさらされる。従って、従来の場合
では軸受やシールの寿命が著しく低下する可能性が高
い。(Operation) Now, the case where the compressor is in a steady operation will be described. For example, assume that the intake air temperature is about 40-50 ° C., but the discharge air temperature is about 150 ° C. In the conventional lubrication system shown in FIG.
The lubricating oil tends to be insufficient for the shaft seals a and 6c and the shaft seals 7a and 7c. Therefore, these parts are originally exposed to severe conditions such as high speed, insufficient lubrication, and high temperature atmosphere. Therefore, in the conventional case, there is a high possibility that the life of the bearing and the seal is significantly reduced.
第１図に於て空気取出口20を通過した被圧縮空気の一
部は、管13によってオイルミスト発生器10に導かれる。
発生器10では、絞り部10aによるベンチュリー管作用に
よって潤滑油タンク12内の潤滑油が供給管15を通して絞
り部10aに吸い上げられ、空気と潤滑油とによるオイル
ミストが生成される。オイルミストは供給管14によって
オイルミスト供給口21a,21b,21cに導かれ、軸受、軸シ
ール、歯車などの潤滑と冷却に用いられる。In FIG. 1, a part of the compressed air that has passed through the air outlet 20 is guided to an oil mist generator 10 by a pipe 13.
In the generator 10, the lubricating oil in the lubricating oil tank 12 is sucked into the throttle unit 10a through the supply pipe 15 by the Venturi tube action of the throttle unit 10a, and an oil mist is generated by the air and the lubricating oil. The oil mist is guided to the oil mist supply ports 21a, 21b, 21c by the supply pipe 14, and is used for lubrication and cooling of bearings, shaft seals, gears, and the like.
軸受等を通過したミストは更に、上部の排出口22を通
ってケーシング外に導かれ、排出管16によってオイルミ
スト分離器11に送られる。分離器11では、ミスト内の油
が回収され、空気のみが大気中に放出される。かくして
各部の損失熱は最終的にはこの空気によって持ち去られ
る。回収した潤滑油は戻し管17によって、再び潤滑油タ
ンク12に戻される。The mist that has passed through the bearings and the like is further guided to the outside of the casing through the upper discharge port 22 and sent to the oil mist separator 11 by the discharge pipe 16. In the separator 11, oil in the mist is recovered, and only air is released into the atmosphere. Thus, the heat loss of each part is eventually carried away by this air. The collected lubricating oil is returned to the lubricating oil tank 12 again by the return pipe 17.
（効果） 被圧縮空気の一部をオイルミスト発生器に供給し、こ
ゝでベンチュリー作用で発生した負圧で吸上げられた潤
滑油をミスト化し、高温となる空気吐出側の軸受部や歯
車噛合部に送るようにしたので、１）油浴はねかけ式に
比べて軸受やシールの潤滑・冷却を確実に行えるように
なった。(Effect) A part of the compressed air is supplied to the oil mist generator, which converts the lubricating oil sucked up by the negative pressure generated by the venturi action into mist, and the high temperature of the air discharge side bearings and gears Since it is sent to the meshing portion, 1) the lubrication and cooling of the bearings and seals can be performed more reliably than in the case of the splashing type oil bath.
２）オイルミスト発生空気圧は大気圧よりも高いので、
ギヤケース内の空気圧が上がり、その結果シール部に負
荷する差圧が減少し、シールの圧力負担が軽減され、シ
ール寿命を改善することができる。2) Since the air pressure at which oil mist is generated is higher than the atmospheric pressure,
The air pressure in the gear case increases, and as a result, the differential pressure applied to the seal portion decreases, the pressure load on the seal is reduced, and the seal life can be improved.
３）ギヤケース内の潤滑油レベルを下げることができ、
その結果潤滑油の攪拌損失を少くすることができる。3) The lubricating oil level in the gear case can be reduced,
As a result, stirring loss of the lubricating oil can be reduced.
４）油浴はねかけ式に比し、軸受等の潤滑性能にすぐれ
ており、軸受の高速化（圧縮機の高速化）に対応可能と
なった。4) Compared to the splash type, the oil bath has excellent lubrication performance for bearings and the like, and can be used for high-speed bearings (high-speed compressors).
５）外部から空気を供給する必要がないので、構成の簡
素化が可能である。5) Since there is no need to supply air from the outside, the configuration can be simplified.
第１図は本発明に係る潤滑法を採用した空気圧縮機。 第２図は従来の油浴・はねかけ式給油方式を採用した空
気圧縮機。 図において； １……ケーシング、２……メスロータ ３……オスロータ、４……プーリ ５……歯車、６……軸受 ７……軸シール、８……吸入チャンバ ９……潤滑油 10……オイルミスト発生器 10a……絞り部 11……オイルミスト分離器 12……潤滑油タンク、13……空気供給管 14……オイルミスト供給管 15……潤滑油供給管 16……オイルミスト排出管 17……潤滑油戻し管、18……潤滑油戻し管 19……逆流防止器、20……空気取出口 21……オイルミスト供給口 22……オイルミスト排出口 23……潤滑油取出口FIG. 1 shows an air compressor employing a lubrication method according to the present invention. FIG. 2 shows an air compressor adopting a conventional oil bath / splash type refueling system. In the figure: 1 ... casing 2 ... female rotor 3 ... male rotor 4 ... pulley 5 ... gear, 6 ... bearing 7 ... shaft seal, 8 ... suction chamber 9 ... lubricating oil 10 ... oil Mist generator 10a… Throttle section 11… Oil mist separator 12… Lubricating oil tank, 13… Air supply pipe 14… Oil mist supply pipe 15… Lubricant oil supply pipe 16… Oil mist discharge pipe 17 ... lubricating oil return pipe, 18 ... lubricating oil return pipe 19 ... backflow preventer, 20 ... air outlet 21 ... oil mist supply port 22 ... oil mist outlet 23 ... lubricating oil outlet
Claims (1)
収納した空気圧縮機において、被圧縮空気の一部を取出
し、該取出された圧縮空気をオイルミスト発生器の絞り
部に導き、絞り部に発生した負圧により潤滑油を吸い上
げてオイルミスト化し、該オイルミストを空気吐出側の
軸受部・シール部及び歯車噛合部に供給して潤滑し、潤
滑後の排出ミストをオイルミスト分離器にて分離し、油
分を回収可能にしたことを特徴とする空気圧縮機の潤滑
方法。In an air compressor having a female rotor and a male rotor housed in a casing, a part of compressed air is taken out, and the taken out compressed air is guided to a throttle part of an oil mist generator, and is generated in the throttle part. The lubricating oil is sucked up by the negative pressure to form an oil mist, and the oil mist is supplied to a bearing portion, a seal portion, and a gear meshing portion on the air discharge side for lubrication, and the discharged mist after lubrication is separated by an oil mist separator. And a method for lubricating an air compressor, wherein oil can be recovered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63305905A JP2580020B2 (en) | 1988-12-05 | 1988-12-05 | Lubrication method for air compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63305905A JP2580020B2 (en) | 1988-12-05 | 1988-12-05 | Lubrication method for air compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02153293A JPH02153293A (en) | 1990-06-12 |
| JP2580020B2 true JP2580020B2 (en) | 1997-02-12 |
Family
ID=17950712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63305905A Expired - Lifetime JP2580020B2 (en) | 1988-12-05 | 1988-12-05 | Lubrication method for air compressor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2580020B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009151895A3 (en) * | 2008-05-21 | 2010-04-22 | Carrier Corporation | Methods and systems for injecting liquid into a screw compressor for noise suppression |
| JP2011149439A (en) * | 2011-03-28 | 2011-08-04 | Kobe Steel Ltd | Screw compressor |
| US8123493B2 (en) | 2008-01-24 | 2012-02-28 | Kobe Steel, Ltd. | Screw compressor |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030205059A1 (en) | 2002-05-02 | 2003-11-06 | Hussmann Corporation | Merchandisers having anti-fog coatings and methods for making the same |
| US20050202178A1 (en) | 2002-05-02 | 2005-09-15 | Hussmann Corporation | Merchandisers having anti-fog coatings and methods for making the same |
| KR101024475B1 (en) * | 2004-02-11 | 2011-03-23 | 엘지전자 주식회사 | Oil supply structure of compressor for air conditioner |
| CN103850941B (en) * | 2012-11-29 | 2017-06-06 | 珠海格力电器股份有限公司 | Compressor oil injection device, compressor lubricating system and refrigerating system |
| BE1025276B1 (en) * | 2017-05-04 | 2019-01-07 | Atlas Copco Airpower Naamloze Vennootschap | Transmission and compressor or vacuum pump provided with such transmission |
| JP7072350B2 (en) * | 2017-05-24 | 2022-05-20 | 株式会社神戸製鋼所 | Oil-cooled compressor |
-
1988
- 1988-12-05 JP JP63305905A patent/JP2580020B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8123493B2 (en) | 2008-01-24 | 2012-02-28 | Kobe Steel, Ltd. | Screw compressor |
| WO2009151895A3 (en) * | 2008-05-21 | 2010-04-22 | Carrier Corporation | Methods and systems for injecting liquid into a screw compressor for noise suppression |
| CN102037245A (en) * | 2008-05-21 | 2011-04-27 | 开利公司 | Methods and systems for injecting liquid into a screw compressor for noise suppression |
| CN102037245B (en) * | 2008-05-21 | 2013-12-25 | 开利公司 | Methods and systems for injecting liquid into screw compressor for noise suppression |
| JP2011149439A (en) * | 2011-03-28 | 2011-08-04 | Kobe Steel Ltd | Screw compressor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02153293A (en) | 1990-06-12 |
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