JPS61152997A - Impeller structure - Google Patents
Impeller structureInfo
- Publication number
- JPS61152997A JPS61152997A JP27361684A JP27361684A JPS61152997A JP S61152997 A JPS61152997 A JP S61152997A JP 27361684 A JP27361684 A JP 27361684A JP 27361684 A JP27361684 A JP 27361684A JP S61152997 A JPS61152997 A JP S61152997A
- Authority
- JP
- Japan
- Prior art keywords
- impeller
- shaft
- ceramic
- spring ring
- metallic
- 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.)
- Pending
Links
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
【発明の詳細な説明】
（発明の技術分野）
本発明は、ターボチャージャ等に用いるインペラ構造体
に関する。DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to an impeller structure used in a turbocharger or the like.
（発明の技術的背景とその問題点）
たとえば、自動車エンジンに用いられるターボチャージ
ャは、高温でかつ高速回転が要求され、またレスポンス
の良いことが求められている。このような要望に対して
近時、ロータ等のセラミックス化が試みられている。窒
化けい素等のファインセラミックスは、耐熱強度が優れ
ており、金属に比べて軽量であることからロータ等に好
適である。しかしながら、セラミックスの熱膨張係数は
金属と合致せず、しかも脆性材であることから、これら
を適切に接合することは難しくセラミックス部品と金属
部品との締結には未だ解決すべき課題が残されている。(Technical Background of the Invention and Problems thereof) For example, turbochargers used in automobile engines are required to rotate at high temperatures and high speeds, and are also required to have good response. In response to such demands, attempts have recently been made to use ceramics for rotors and the like. Fine ceramics such as silicon nitride have excellent heat resistance and strength, and are lighter than metals, making them suitable for rotors and the like. However, the coefficient of thermal expansion of ceramics does not match that of metals, and since it is a brittle material, it is difficult to properly join them, and there are still issues to be solved in joining ceramic parts and metal parts. There is.
（発明の目的）
本発明は、セラミックスでなる軸と、Ａ１等で形成され
る金属インペラを適切に締結した構造体を提供するもの
である。(Objective of the Invention) The present invention provides a structure in which a shaft made of ceramics and a metal impeller made of A1 or the like are appropriately fastened together.
（発明の概要）
本発明の構造体は、セラミックス軸を押圧する環状体に
より金属インペラを保持する手段を具備してなることを
特徴とする。環状体とじては、弾性を有する、例えばバ
ネリング等が、インペラの保持状態を安定にしかつ振動
を吸収するうえで好ましい。この場合環状体とともに緩
衝材を用いればさらに効果がある。また環状体を形状記
憶合金で形成し、記憶させる形状を＾湿状態でより適切
な保持状態になるように調整しておくことにより好まし
い締結状態を得ることが出来る。形状記憶合金としては
、機械的強度の大きいＮｉ−７ｉ系合金が適用できる。(Summary of the Invention) The structure of the present invention is characterized by comprising means for holding a metal impeller by an annular body that presses a ceramic shaft. As the annular body, it is preferable to use an elastic material such as a spring ring in order to stabilize the holding state of the impeller and absorb vibrations. In this case, it is more effective to use a cushioning material together with the annular body. In addition, a preferable fastening state can be obtained by forming the annular body from a shape memory alloy and adjusting the memorized shape so that it can be held more appropriately in a wet state. As the shape memory alloy, a Ni-7i alloy with high mechanical strength can be used.
（発明の実施例） １、第１図に本発明構造体の一実施例を示す。(Example of the invention) 1. FIG. 1 shows an embodiment of the structure of the present invention.
この例では、セラミックス軸１にＡ１合金製のインペラ
を嵌着したのち、軟金属（例えばＣｕ等）でなる緩衝ワ
ッシャ３を介してバネリング４によりインペラ２を締結
したものである。軸１の断面はインペラ２の回転を防ぐ
ために非円形に形成しである。なおインペラ２の基部に
も緩衝材５を設けである。この構造によればインペラを
確実にかつ衝撃を受けることなく締結することができる
。In this example, an impeller made of A1 alloy is fitted onto a ceramic shaft 1, and then the impeller 2 is fastened with a spring ring 4 via a buffer washer 3 made of soft metal (for example, Cu). The shaft 1 has a non-circular cross section to prevent the impeller 2 from rotating. Note that a cushioning material 5 is also provided at the base of the impeller 2. According to this structure, the impeller can be fastened securely and without being subjected to impact.
２、前記１においてバネリング４として形状記憶合金（
５ＯＮｉ −丁１合金）を用いることができる予想され
る温度（例えば１００〜１５０℃）で膨張して締結状態
がより強固となるように形状を記憶させたものを用いる
。この構造によれば高温かつ高速回転での使用に耐え得
るものとなる。また、バネリング４に替えて、帯体を軸
に巻回したものを用いることもできる。帯体は、例えば
締付ボルト等により締付力を調整できるようにすれば適
切な締結状態を容易に得ることができる。2. In 1 above, the spring ring 4 is made of a shape memory alloy (
A material whose shape is memorized so that it expands at the expected temperature (for example, 100 to 150° C.) and makes the fastened state stronger is used. This structure can withstand use at high temperatures and high speed rotation. Further, instead of the spring ring 4, a belt wound around a shaft may be used. An appropriate fastening state can be easily obtained by adjusting the tightening force of the band using, for example, a tightening bolt.
また、バネリング４に替えて、輪１に金属リングを装着
し、このリングに押ネジを設は押ネジを軸に当接させて
押圧させる構造とすることもよい。この場合、金属リン
グをインペラと一体化することも可能である。Further, instead of the spring ring 4, a metal ring may be attached to the ring 1, and a set screw may be provided on this ring, so that the set screw is brought into contact with the shaft and pressed. In this case, it is also possible to integrate the metal ring with the impeller.
（発明の効果）
本発明によればセラミックス軸に金属インペラを適切に
締結することができる。(Effects of the Invention) According to the present invention, a metal impeller can be appropriately fastened to a ceramic shaft.
第１図は本発明の実施例を示す部分断面図である。 １・・・軸 ２・・・インペラ ３・・・緩衝ワッシャ ４・・・バネリング 代理人弁理士 則 近 憲 佑 （ほか１名） FIG. 1 is a partial sectional view showing an embodiment of the present invention. 1...axis 2... Impeller 3...Buffer washer 4... Spring ring Representative Patent Attorney Kensuke Chika (1 other person)
Claims (1)
あって、前記軸を押圧する環状体により前記インペラを
保持する手段を具備してなることを特徴とするインペラ
構造体。 ２、環状体を弾性体で形成したものである特許請求の範
囲１項に記載のインペラ構造体。 ３、環状体を形状記憶合金で形成したものである特許請
求の範囲第１項に記載のインペラ構造体。 ４、環状体は緩衝材とともに用いる特許請求の範囲第１
項に記載のインペラ構造体。[Scope of Claims] 1. An impeller structure comprising a metal impeller fastened to a ceramic shaft, and comprising means for holding the impeller by an annular body that presses the shaft. 2. The impeller structure according to claim 1, wherein the annular body is made of an elastic body. 3. The impeller structure according to claim 1, wherein the annular body is made of a shape memory alloy. 4. Claim 1 in which the annular body is used together with a cushioning material
The impeller structure described in Section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27361684A JPS61152997A (en) | 1984-12-27 | 1984-12-27 | Impeller structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27361684A JPS61152997A (en) | 1984-12-27 | 1984-12-27 | Impeller structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61152997A true JPS61152997A (en) | 1986-07-11 |
Family
ID=17530211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27361684A Pending JPS61152997A (en) | 1984-12-27 | 1984-12-27 | Impeller structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61152997A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2921408A1 (en) * | 2007-09-26 | 2009-03-27 | Snecma Sa | Annular sealing and vibration dampening ring for turbomachine rotor in e.g. automobile field, has square, rectangular or circular shaped section, where ring is made of super-elastic metal material such as shape memory alloy material |
| FR2931870A1 (en) * | 2008-05-29 | 2009-12-04 | Snecma | Rotating piece e.g. turbine shaft, for e.g. jet engine of aircraft, has balancing units comprising ring, where center of gravity of ring is remote from symmetry axle of its internal surface and positioned to compensate unbalance of piece |
-
1984
- 1984-12-27 JP JP27361684A patent/JPS61152997A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2921408A1 (en) * | 2007-09-26 | 2009-03-27 | Snecma Sa | Annular sealing and vibration dampening ring for turbomachine rotor in e.g. automobile field, has square, rectangular or circular shaped section, where ring is made of super-elastic metal material such as shape memory alloy material |
| FR2931870A1 (en) * | 2008-05-29 | 2009-12-04 | Snecma | Rotating piece e.g. turbine shaft, for e.g. jet engine of aircraft, has balancing units comprising ring, where center of gravity of ring is remote from symmetry axle of its internal surface and positioned to compensate unbalance of piece |
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