JPH063158Y2 - Turbine shaft - Google Patents
Turbine shaftInfo
- Publication number
- JPH063158Y2 JPH063158Y2 JP1986189823U JP18982386U JPH063158Y2 JP H063158 Y2 JPH063158 Y2 JP H063158Y2 JP 1986189823 U JP1986189823 U JP 1986189823U JP 18982386 U JP18982386 U JP 18982386U JP H063158 Y2 JPH063158 Y2 JP H063158Y2
- Authority
- JP
- Japan
- Prior art keywords
- inner ring
- turbine shaft
- ball bearing
- journal
- turbine
- 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
- Supercharger (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は、自動車用、舶用、産業用の過給エンジンに使
用される過給機や燃料電池等の小規模のプラントに使用
される過給機、あるいはガスタービン等において、玉軸
受に支持されたタービン軸に関するものである。[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a supercharger used for a supercharged engine for automobiles, ships, and industry, and a supercharger used for a small-scale plant such as a fuel cell. The present invention relates to a turbine shaft supported by ball bearings in a feeder, a gas turbine, or the like.
従来、過給機等のタービン軸のジャーナル部表面は円筒
状の平面に形成されており、タービン軸を支持する玉軸
受の内輪と前記ジャーナル部とは僅かなすき間を保持し
て嵌合している。そして、タービン軸は高温ガスにさら
された翼車部分からの熱伝導で、運転中には数百度（゜
C）以上に加熱され、さらに、ヒートソーク時には、よ
り高温に加熱される。一方、玉軸受の内輪もジャーナル
部からの伝熱で、かなりの高温（数百度゜C）になるが、
ジャーナル部の方が内輪よりも温度が高いため熱膨張量
が内輪よりも大きく、ジャーナル部表面は内輪の内表面
とタイトに密着する。そして、それが長時間にわたり繰
り返されると、ジャーナル部と玉軸受間の潤滑油のカー
ボン化現象と相俟って、ジャーナル部表面と玉軸受内表
面が焼付きを起し、タービン軸が抜けなくなるという問
題があった。また、金属製の玉軸受の代わりにセラミッ
ク製の玉軸受を使用した場合には、内輪の熱膨張がより
小さいことから、内輪に過大な内圧および張力が生じ
て、割れ等の破損を起こし、事故に至るなどの問題があ
った。Conventionally, the surface of the journal portion of a turbine shaft of a supercharger or the like is formed into a cylindrical flat surface, and the inner ring of a ball bearing that supports the turbine shaft and the journal portion are fitted with each other while holding a slight gap. There is. And, the turbine shaft is a heat conduction from the impeller part exposed to the high temperature gas, and it is several hundred degrees (° C) during operation.
It is heated above C) and further heated to a higher temperature during heat soaking. On the other hand, the inner ring of the ball bearing also heats up considerably from the journal part, resulting in a fairly high temperature (several hundred degrees ° C).
Since the temperature of the journal portion is higher than that of the inner ring, the thermal expansion amount is larger than that of the inner ring, and the surface of the journal portion tightly adheres to the inner surface of the inner ring. If this is repeated for a long time, the surface of the journal and the inner surface of the ball bearing will seize due to the carbonization phenomenon of the lubricating oil between the journal and the ball bearing, and the turbine shaft will not come off. There was a problem. Further, when a ceramic ball bearing is used instead of a metal ball bearing, the inner ring has a smaller thermal expansion, so that excessive inner pressure and tension are generated in the inner ring, causing damage such as cracking, There were problems such as an accident.
本考案は、上記問題点を有効に解決するもので、タービ
ン翼車側の玉軸受が嵌合するジャーナル部表面に、所要
数の溝が軸方向に刻設され、かつ刻溝が軸受け位置決め
のための段部に延長して刻設されているタービン軸とし
たものである。The present invention effectively solves the above-mentioned problems, in which a required number of grooves are axially engraved on the surface of the journal portion to which the ball bearing on the turbine wheel side is fitted, and the engraved grooves are used for bearing positioning. It is a turbine shaft that is extended and engraved on the stepped portion.
ジャーナル部表面に溝を刻設したことにより、玉軸受内
輪との接触面積が小となるから、ジャーナル部が熱膨張
しても内輪に過大な内圧が作用することがなく、したが
って、密着力が低下することにより焼付きの可能性が減
少する。By engraving the groove on the surface of the journal part, the contact area with the inner ring of the ball bearing is small, so even if the journal part thermally expands, an excessive internal pressure does not act on the inner ring, and therefore the adhesion force The reduction reduces the likelihood of seizure.
また、焼き付いた場合でも、接触面積が小さいから、小
さな力で抜き出すことができ、あるいは刻設した溝を利
用して工具により内輪を引き出すこともできる。Further, even if it is seized, since the contact area is small, it can be pulled out with a small force, or the inner ring can be pulled out by a tool using a groove formed.
第１図ないし第３図は本考案の一実施例を示したもので
ある。図中、１は過給機等のタービン翼車、２はタービ
ン軸、３はジャーナル部、４および4′は玉軸受、4aは
玉軸受の内輪、５は溝である。1 to 3 show an embodiment of the present invention. In the figure, 1 is a turbine wheel such as a supercharger, 2 is a turbine shaft, 3 is a journal portion, 4 and 4'are ball bearings, 4a is an inner ring of the ball bearing, and 5 is a groove.
すなわち、タービン軸２はジャーナル部３で玉軸受4,
4′により支持されている。そしてタービン側玉軸受４
が嵌合するジャーナル部表面には所要数の溝５が軸方向
に刻設されている。前記溝５は内輪4aの幅よりも長め
に、そして、位置決めをするための段部2aにも刻設さ
れ、焼き付いた軸受を適当な工具により引き出せるよう
になっている。ここで、溝の形状、個数は軸の強度およ
び加工性等を考慮して決定される。That is, the turbine shaft 2 has the journal portion 3 and the ball bearings 4,
It is supported by 4 '. And the turbine side ball bearing 4
A required number of grooves 5 are formed in the axial direction on the surface of the journal portion into which is fitted. The groove 5 is made longer than the width of the inner ring 4a, and is also formed in the step portion 2a for positioning so that the seized bearing can be pulled out by an appropriate tool. Here, the shape and the number of grooves are determined in consideration of the strength of the shaft, the workability, and the like.
本考案は、上記のように、タービン側玉軸受のジャーナ
ル部表面に軸方向に所要数の溝を刻設したことにより、
ジャーナル部表面と玉軸受内輪との接触面積が小さくな
ると共に溝部でのフレキシビリティも期待できる。According to the present invention, as described above, by engraving the required number of grooves in the axial direction on the surface of the journal portion of the turbine side ball bearing,
The contact area between the surface of the journal and the inner ring of the ball bearing is reduced, and flexibility in the groove can be expected.
したがって、ジャーナル部と内輪の熱膨張差により、両
者が密着し内輪に内圧が作用しても従来に比して小さ
く、密着力が小さいことから焼付きの可能性が減少す
る。Therefore, due to the difference in thermal expansion between the journal portion and the inner ring, even if both are in close contact with each other and the inner pressure acts on the inner ring, the internal pressure is smaller than in the conventional case, and the adhesion force is small, so that the possibility of seizure is reduced.
また焼き付いた場合でも接触面積が小さいから、小さな
力で抜き出すことができ、溝を利用して適当な工具によ
り内輪を引き出すことができる。さらに、内輪に作用す
る張力が小さくなることから、内輪の材料としてセラミ
ック等の熱膨張率が小さく、引張強度も小さな材料を使
用した場合でも割れ等の破損が生じる可能性が少なくな
るなどの優れた効果を奏することができる。Further, even if it is seized, since the contact area is small, it can be pulled out with a small force, and the inner ring can be pulled out by an appropriate tool using the groove. Furthermore, since the tension acting on the inner ring is small, the coefficient of thermal expansion such as ceramics is small as the material of the inner ring, and even if a material with a small tensile strength is used, the possibility of damage such as cracking is reduced. It is possible to exert the effect.
第１図は本考案の一実施例を示す正面図、第２図は第１
図の溝部の拡大断面図、第３図は第２図の線Ａ−Ａ矢視
図である。 １……タービン翼車 ２……タービン軸 2a……段部 ３……ジャーナル部 4,4′……玉軸受 ５……溝FIG. 1 is a front view showing an embodiment of the present invention, and FIG. 2 is a first view.
FIG. 3 is an enlarged cross-sectional view of the groove portion in the figure, and FIG. 3 is a view taken along the line AA of FIG. 1 ... Turbine wheel 2 ... Turbine shaft 2a ... Step 3 ... Journal section 4,4 '... Ball bearing 5 ... Groove
Claims (1)
て、タービン翼車側の玉軸受が嵌合するジャーナル部表
面に所要数の溝が軸方向に刻設され、かつ該溝が軸受け
位置決めのための段部に延長して刻設されていることを
特徴とするタービン軸。1. In a turbine shaft supported by ball bearings, a required number of grooves are axially formed in the surface of a journal portion to which the ball bearings on the turbine wheel side are fitted, and the grooves are used for bearing positioning. A turbine shaft that is extended and engraved on a step portion for
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986189823U JPH063158Y2 (en) | 1986-12-11 | 1986-12-11 | Turbine shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986189823U JPH063158Y2 (en) | 1986-12-11 | 1986-12-11 | Turbine shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6396247U JPS6396247U (en) | 1988-06-21 |
| JPH063158Y2 true JPH063158Y2 (en) | 1994-01-26 |
Family
ID=31142466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986189823U Expired - Lifetime JPH063158Y2 (en) | 1986-12-11 | 1986-12-11 | Turbine shaft |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH063158Y2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60147971U (en) * | 1984-03-09 | 1985-10-01 | 株式会社富士通ゼネラル | Electric motor bearing fixing structure |
-
1986
- 1986-12-11 JP JP1986189823U patent/JPH063158Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6396247U (en) | 1988-06-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0415361B2 (en) | ||
| JPS5842149B2 (en) | A combination between a ceramic part and a metal part | |
| US4518315A (en) | Arrangement for connecting a ceramic rotor wheel, particularly a turbine rotor wheel of a turbomachine, such as a gas turbine engine, to a metallic shaft | |
| JPH063158Y2 (en) | Turbine shaft | |
| EP0472171B1 (en) | Ceramic rotor and metal shaft assembly | |
| JPS60129464A (en) | Cam piece and method of producing same | |
| JPH0360794B2 (en) | ||
| EP3470648B1 (en) | Turbocharger | |
| JP3077410B2 (en) | Turbocharger turbine housing | |
| JPH0352961Y2 (en) | ||
| CN1071407C (en) | Sealing sheet of cylinder cover | |
| JPS618410A (en) | Turbo-charger rotor | |
| JPH0417761Y2 (en) | ||
| JPS6143924Y2 (en) | ||
| JPH0345938Y2 (en) | ||
| JPH03154B2 (en) | ||
| JPH0642526A (en) | Connecting rod made of aluminum alloy of internal-combustion engine | |
| JPH041165B2 (en) | ||
| JPS5819324Y2 (en) | engine piston | |
| JP2508400Y2 (en) | Mounting structure for ceramic rolling bearings | |
| JPS623834A (en) | Joint body of ceramic member and metallic member and its production | |
| JP2501190Y2 (en) | Cylinder liner with ring | |
| JPH037368Y2 (en) | ||
| JPH1130103A (en) | Slip check plate of moving blade of gas turbine | |
| JPH01261519A (en) | Bearing fixing device |