JPH0220853B2 - - Google Patents
Info
- Publication number
- JPH0220853B2 JPH0220853B2 JP61233705A JP23370586A JPH0220853B2 JP H0220853 B2 JPH0220853 B2 JP H0220853B2 JP 61233705 A JP61233705 A JP 61233705A JP 23370586 A JP23370586 A JP 23370586A JP H0220853 B2 JPH0220853 B2 JP H0220853B2
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- water
- sliding surface
- supplied
- steam
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 32
- 238000000034 method Methods 0.000 claims description 13
- 239000000919 ceramic Substances 0.000 claims description 10
- 238000009835 boiling Methods 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 230000007423 decrease Effects 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000010687 lubricating oil Substances 0.000 description 7
- 238000001816 cooling Methods 0.000 description 5
- 238000005461 lubrication Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 230000002706 hydrostatic effect Effects 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000011109 contamination Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
Landscapes
- Sliding-Contact Bearings (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は高温下で作動される排気ガスタービン
の滑り軸受の軸受方法に関し、更に詳しくは該排
気ガスタービンの軸受を蒸気によつて軸受する方
法に関する。Detailed Description of the Invention (Industrial Application Field) The present invention relates to a bearing method for a sliding bearing of an exhaust gas turbine operated under high temperature, and more specifically, a method for bearing a sliding bearing of an exhaust gas turbine operated by steam. Regarding the method.
（従来の技術）
一般に、滑り軸受には潤滑油を用いた動圧軸受
や、圧縮空気などを摺動接触面に送り込む静圧軸
受などがある。(Prior Art) In general, sliding bearings include dynamic pressure bearings that use lubricating oil and static pressure bearings that send compressed air or the like to sliding contact surfaces.
高温排気ガスタービンは高温の排気ガスによつ
て駆動されるものであるため、該排気ガスタービ
ンの軸受も高温となつている。このため、排気ガ
スタービンの軸受には大量の潤滑油が供給され、
該潤滑油によつて軸受の潤滑と同時に軸受の冷却
をも行なつているのが普通である。 Since the high-temperature exhaust gas turbine is driven by high-temperature exhaust gas, the bearings of the exhaust gas turbine are also at a high temperature. For this reason, a large amount of lubricating oil is supplied to the bearings of the exhaust gas turbine.
Normally, the lubricating oil not only lubricates the bearing but also cools the bearing.
（発明が解決しようとする課題）
ところが、上記従来公知の排気ガスタービンの
軸受方法によると、次のような問題点があつた。(Problems to be Solved by the Invention) However, the conventionally known exhaust gas turbine bearing method described above has the following problems.
排気ガスタービンの軸受は高温となつており、
該軸受を潤滑するには大量の潤滑油を供給して潤
滑と冷却とを行なう必要があるが、このような大
量の潤滑を行なうためには潤滑や冷却のための複
雑の構造を必要とし、かつ装置を大形化してしま
う。このため、装置製造コストや維持コストが高
コストとなつてしまう。 Exhaust gas turbine bearings are hot,
To lubricate the bearing, it is necessary to supply a large amount of lubricating oil for lubrication and cooling, but in order to provide such a large amount of lubrication, a complex structure for lubrication and cooling is required. In addition, the device becomes larger. This results in high device manufacturing costs and high maintenance costs.
上記欠点を解消するものとして、軸及び軸受を
耐熱性の高いセラミツクスで構成し、これによつ
て潤滑を省略した軸受も公知である。 In order to overcome the above-mentioned drawbacks, a bearing is known in which the shaft and the bearing are made of highly heat-resistant ceramics, thereby omitting lubrication.
ところが、セラミツクスで構成した軸受では軸
と軸受とが直接接触するので、摩耗が促進され、
場合によつては部分的な破壊も生じるおそれがあ
り、機器の耐久性や信頼性の面に問題があつた。
又、セラミツクスの軸受では潤滑油による潤滑が
ないので該軸受の周辺機器へ高温の熱が伝達さ
れ、周辺機器に熱の問題を生ぜしめる欠点もあつ
た。 However, with bearings made of ceramics, the shaft and bearing come into direct contact, which accelerates wear and tear.
In some cases, partial destruction may occur, which poses problems in the durability and reliability of the equipment.
Furthermore, since ceramic bearings are not lubricated by lubricating oil, high-temperature heat is transmitted to peripheral equipment of the bearing, causing heat problems in the peripheral equipment.
そこで、本発明の目的は、セラミツクス製の排
気ガスタービン軸受において、大きな冷却作用を
有し、かつ潤滑作用も有する潤滑方法を採用し、
以て軸受や周辺機器の耐久性や信頼性を向上させ
んとするにある。 Therefore, an object of the present invention is to adopt a lubrication method that has a large cooling effect and also has a lubricating effect in a ceramic exhaust gas turbine bearing,
The aim is to improve the durability and reliability of bearings and peripheral equipment.
（課題を解決するための手段）
本発明の特徴とするところは、次のような蒸気
軸受方法を提供することにある。(Means for Solving the Problems) The present invention is characterized by providing the following steam bearing method.
即ち、高温下で作動される排気ガスタービンの
軸受であつて、内周面が滑り面となつている軸受
本体がセラミツクスで構成され、回転軸がセラミ
ツクスあるいは耐熱性のステンレス鋼から構成さ
れ、軸受本体に放射状の貫通孔が複数本設けら
れ、該貫通孔は給水手段に連結され、前記軸受本
体の両端部分の回転軸との間には前記滑り面内部
に生ずる蒸気が排出される間隙が設けられ、前記
貫通孔を介して所定の圧力で水が供給されるよう
になつている軸受方法において、前記滑り面内で
の水の沸騰が膜沸騰となるように供給水の圧力を
定め、前記滑り面内で生じた蒸気が前記間隙から
逃げることによつて該滑り面内の蒸気圧が低下
し、該蒸気圧の低下によつて自動的に前記貫通孔
を介して水が滑り面内へ供給されることにより、
供給水量を自己制御することを特徴とする高温排
気ガスタービン軸受における蒸気軸受方法。 In other words, this is a bearing for an exhaust gas turbine that operates under high temperatures.The bearing body whose inner peripheral surface is a sliding surface is made of ceramics, and the rotating shaft is made of ceramics or heat-resistant stainless steel. A plurality of radial through holes are provided in the main body, the through holes are connected to a water supply means, and a gap is provided between the rotating shaft at both end portions of the bearing main body through which steam generated inside the sliding surface is discharged. and in which water is supplied at a predetermined pressure through the through hole, the pressure of the supplied water is determined so that boiling of the water within the sliding surface becomes film boiling; As the steam generated within the sliding surface escapes from the gap, the steam pressure within the sliding surface decreases, and this reduction in steam pressure automatically causes water to flow into the sliding surface through the through hole. By being supplied,
A steam bearing method for a high-temperature exhaust gas turbine bearing, characterized by self-controlling the amount of water supplied.
（実施例）
以下に、本発明の一実施例を示す方法を図を参
照しながら説明する。(Example) A method showing an example of the present invention will be described below with reference to the drawings.
滑り軸受１は自動車等に搭載されているターボ
チヤージヤの排気ガスタービンの軸受部分であ
り、軸受本体２はセラミツクスで構成され、回転
軸３はセラミツクスあるいは加工性の面から耐熱
ステンレス鋼からなつている。軸受本体２の内面
は滑り面４となつている。軸受本体２には放射状
の貫通孔５が複数本設けられ、該貫通孔５は一方
では軸受本体２の外周面に開口し、他方では滑り
面４側に開口している。該貫通孔５には図示しな
い給水ポンプ等の給水手段に連結され、所定の圧
力で水が供給されるようになつている。軸受本体
２の両端部分の回転軸３との間の間隙６は軸受部
分に生ずる蒸気の排出開口となつており、ここか
ら蒸気が逃げるものである。 The sliding bearing 1 is a bearing part of an exhaust gas turbine of a turbocharger mounted on an automobile, etc. The bearing body 2 is made of ceramics, and the rotating shaft 3 is made of ceramics or heat-resistant stainless steel from the viewpoint of workability. The inner surface of the bearing body 2 is a sliding surface 4. A plurality of radial through holes 5 are provided in the bearing body 2, and the through holes 5 open on the outer peripheral surface of the bearing body 2 on one side and on the sliding surface 4 side on the other side. The through hole 5 is connected to a water supply means such as a water supply pump (not shown), and water is supplied at a predetermined pressure. A gap 6 between the end portions of the bearing body 2 and the rotating shaft 3 serves as a discharge opening for steam generated in the bearing portion, from which the steam escapes.
以上のように構成された本発明の軸受方法につ
いて、その作用を説明する。 The operation of the bearing method of the present invention configured as described above will be explained.
軸受本体２及び回転軸３は自動車等に使用され
ている排気ガスタービンに使用されているもので
あるから、両者共に高温となつている。 Since the bearing body 2 and the rotating shaft 3 are used in exhaust gas turbines used in automobiles and the like, both of them are at high temperatures.
今、軸受本体２の貫通孔５から所定の圧力で水
を滑り面４側に供給すると、該水は軸受本体２及
び回転軸３から熱を受けて蒸発し、蒸気となる。
この蒸発熱によつて軸受本体２及び回転軸３の熱
を奪い、これらを冷却する。 Now, when water is supplied to the sliding surface 4 side at a predetermined pressure from the through hole 5 of the bearing body 2, the water receives heat from the bearing body 2 and the rotating shaft 3, evaporates, and becomes steam.
This heat of evaporation removes heat from the bearing body 2 and rotating shaft 3, thereby cooling them.
それと同時に、供給される水の量を適当に（比
較的少量に）設定すると、滑り面４内部での水の
沸騰が膜沸騰となる。この膜沸騰状態となると、
軸受本体２の滑り面４の内表面及び回転軸３の外
周面に蒸気の膜が生ずる。このため、膜沸騰状態
における蒸気によつて静止軸受作用が行なわれる
ものとなる。 At the same time, if the amount of water supplied is set appropriately (relatively small), the boiling of water inside the sliding surface 4 becomes film boiling. When this film boils,
A film of steam is formed on the inner surface of the sliding surface 4 of the bearing body 2 and on the outer peripheral surface of the rotating shaft 3. Therefore, the steam in the film boiling state performs a static bearing action.
滑り面４内で蒸発する蒸気は徐々にその量が増
し、両端の間隙６から逃げ出すので、その分だけ
水を供給しなければならないが、本発明では供給
される水の圧力を所定値に設定して置くだけで自
動的に水の供給がなされる。即ち、蒸気が両端の
間隙から逃げ出すと、その分だけ滑り面４内の圧
力が低下するが、供給水は所定の圧力にされてい
るので、圧力低下の分だけ自動的に供給される。 The amount of steam that evaporates within the sliding surface 4 gradually increases and escapes from the gaps 6 at both ends, so water must be supplied in proportion to that amount, but in the present invention, the pressure of the supplied water is set to a predetermined value. Just leave it on and water will be supplied automatically. That is, when steam escapes from the gaps at both ends, the pressure within the sliding surface 4 decreases by that amount, but since the supply water is at a predetermined pressure, it is automatically supplied by the amount corresponding to the pressure decrease.
尚、上記実施例に本発明は限定されるものでは
ない。 Note that the present invention is not limited to the above embodiments.
例えば、放水部、蒸気排出部の構造、位置、数
は上記実施例のものに限定されない。 For example, the structure, position, and number of the water discharge section and the steam discharge section are not limited to those of the above embodiment.
又、滑り軸受がジヤーナル軸受の他、スラスト
軸受でもよいことは勿論である。 Furthermore, it goes without saying that the sliding bearing may be a thrust bearing in addition to a journal bearing.
水蒸気は大気中に逃がす他に、例えばタービン
を回転したり、熱交換器に導いたりしてその熱エ
ネルギを回収するようにしてもよい。 In addition to letting the water vapor escape into the atmosphere, its thermal energy may be recovered by, for example, rotating a turbine or guiding it to a heat exchanger.
（発明の効果）
本発明の蒸気軸受方法によると、滑り面に水を
送る貫通孔と、水蒸気を逃がす間隙を備えて成
り、次に列挙する効果を奏する。(Effects of the Invention) The steam bearing method of the present invention includes a through hole for sending water to the sliding surface and a gap for releasing water vapor, and provides the following effects.
静圧軸受には本来コンプレツサ等の高価で場
所をとる付属設備を必要とするが、本発明の蒸
気軸受方法によると、作用的には静圧軸受とな
つているが、水を用いているので所定の圧力で
水を供給するだけで良いので、前記高価で場所
をとる静圧発生装置が不要である。 Hydrostatic bearings originally require expensive and space-consuming accessory equipment such as a compressor, but according to the steam bearing method of the present invention, although it is functionally a hydrostatic bearing, it uses water. Since water only needs to be supplied at a predetermined pressure, the expensive and space-consuming static pressure generating device described above is not required.
静圧発生装置がないので故障が少ないものと
なる。 Since there is no static pressure generator, there are fewer failures.
水が蒸気となる際に冷却作用があるので、高
速、高温下における軸受の焼付きを防止できる
ものとなる。 Since water has a cooling effect when it turns into steam, it is possible to prevent bearing seizing at high speeds and high temperatures.
水を利用しているので、潤滑油に比較し安価
であると同時に、潤滑油のような経年劣化がな
い。 Since it uses water, it is cheaper than lubricating oil and does not deteriorate over time like lubricating oil.
水を利用しているので、潤滑流体の漏れによ
る火災、汚れということが皆無である。 Since water is used, there is no risk of fire or contamination due to leakage of lubricating fluid.
給水量が自己規制されるので、制御の困難性
がないものとなつている。 Since the amount of water supplied is self-regulated, there is no difficulty in controlling it.
図は、本発明の一実施例を示す断面図である。
１：滑り軸受、２：軸受本体、３：回転軸、
４：滑り面、５：貫通孔、６：蒸気排出部。
The figure is a sectional view showing one embodiment of the present invention. 1: Slide bearing, 2: Bearing body, 3: Rotating shaft,
4: Sliding surface, 5: Through hole, 6: Steam exhaust part.
Claims (1)
であつて、内周面が滑り面となつている軸受本体
がセラミツクスで構成され、回転軸がセラミツク
スあるいは耐熱性のステンレス鋼から構成され、
軸受本体に放射状の貫通孔が複数本設けられ、該
貫通孔は給水手段に連結され、前記軸受本体の両
端部分の回転軸との間には前記滑り面内部に生ず
る蒸気が排出される間隙が設けられ、前記貫通孔
を介して所定の圧力で水が供給されるようになつ
ている軸受方法において、 前記滑り面内での水の沸騰が膜沸騰となるよう
に供給水の圧力を定め、前記滑り面内で生じた蒸
気が前記間隙から逃げることによつて該滑り面内
の蒸気圧が低下し、該蒸気圧の低下によつて自動
的に前記貫通孔を介して水が滑り面内へ供給され
ることにより、供給水量を自己制御することを特
徴とする高温排気ガスタービン軸受における蒸気
軸受方法。[Scope of Claims] 1. A bearing for an exhaust gas turbine that operates under high temperatures, in which the bearing body whose inner peripheral surface is a sliding surface is made of ceramics, and the rotating shaft is made of ceramics or heat-resistant stainless steel. It consists of
A plurality of radial through holes are provided in the bearing body, the through holes are connected to a water supply means, and a gap is provided between the rotating shaft at both ends of the bearing body through which steam generated inside the sliding surface is discharged. In the bearing method, in which water is supplied at a predetermined pressure through the through hole, the pressure of the supplied water is determined so that boiling of the water within the sliding surface becomes film boiling; As the steam generated within the sliding surface escapes from the gap, the steam pressure within the sliding surface decreases, and this decrease in vapor pressure automatically causes water to flow through the through hole into the sliding surface. A steam bearing method for a high-temperature exhaust gas turbine bearing, characterized in that the amount of water supplied is self-controlled by being supplied to the bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23370586A JPS6388319A (en) | 1986-10-01 | 1986-10-01 | Method and device for bearing in slide bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23370586A JPS6388319A (en) | 1986-10-01 | 1986-10-01 | Method and device for bearing in slide bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6388319A JPS6388319A (en) | 1988-04-19 |
| JPH0220853B2 true JPH0220853B2 (en) | 1990-05-10 |
Family
ID=16959255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23370586A Granted JPS6388319A (en) | 1986-10-01 | 1986-10-01 | Method and device for bearing in slide bearing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6388319A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0280218U (en) * | 1988-12-12 | 1990-06-20 | ||
| JP4996313B2 (en) * | 2007-04-10 | 2012-08-08 | 大阪瓦斯株式会社 | Gas seal mechanism and power system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6073123A (en) * | 1983-09-30 | 1985-04-25 | Ebara Corp | Combined sliding member |
-
1986
- 1986-10-01 JP JP23370586A patent/JPS6388319A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6073123A (en) * | 1983-09-30 | 1985-04-25 | Ebara Corp | Combined sliding member |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6388319A (en) | 1988-04-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |