JPS58220901A - Installing structure of impeller onto ceramic shaft - Google Patents
Installing structure of impeller onto ceramic shaftInfo
- Publication number
- JPS58220901A JPS58220901A JP10130382A JP10130382A JPS58220901A JP S58220901 A JPS58220901 A JP S58220901A JP 10130382 A JP10130382 A JP 10130382A JP 10130382 A JP10130382 A JP 10130382A JP S58220901 A JPS58220901 A JP S58220901A
- Authority
- JP
- Japan
- Prior art keywords
- impeller
- ceramic shaft
- sleeve
- engaging
- metal sleeve
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/02—Blade-carrying members, e.g. rotors
- F01D5/025—Fixing blade carrying members on shafts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supercharger (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
【発明の詳細な説明】 本発明はインペラのセラミック軸取付は構造に関する。[Detailed description of the invention] The present invention relates to a ceramic shaft mounting structure for an impeller.
近年のガスタービンやターボチャージャにおいては、耐
熱材料として優れた特性を持つのみならず、その他の機
械的特性においても金属材料に比して適性のあるセラミ
ックスを高温部品に適用する研究が進められており、殊
にタービンロータとロータ軸とをセラミックスで一体に
成形すれば、効果的に重量軽減と慣性力の低減が図れる
のみならずコストダウンが図れるが、このような場合セ
ラミックスのロータ軸に例えば軽合金製の圧縮機インペ
ラを取付けねばならず、種々な問題点の解決が必要とさ
れる。In recent years, research has been underway to apply ceramics to high-temperature parts in gas turbines and turbochargers, which not only have excellent properties as a heat-resistant material but also have other mechanical properties that are more suitable than metal materials. In particular, if the turbine rotor and rotor shaft are integrally molded from ceramics, it is possible to effectively reduce weight and inertia as well as reduce costs. A compressor impeller made of light alloy must be installed, and various problems must be solved.
第１図は従来のこの種インペラのセラミック軸との取付
は構造の一例を示しく特願昭！ｌｌ −６１１３１３号
参照）、ここでｌはセラミックロータ軸（以下でセラミ
ック軸という）であり、その段付き部／Ａから先の小径
軸部／Ｂには圧縮機インペラコが嵌め合わされており、
インペラコを段付き部／Ａに当接させた状態となし、軸
部／Ｂの端部に螺刻されているねじ部／Ｃにナツト３を
締着してインペラコを固定している。グは軸ｌ用の軸受
部材を示す。Figure 1 shows an example of the structure of a conventional impeller of this type attached to a ceramic shaft. ll-611313), where l is a ceramic rotor shaft (hereinafter referred to as a ceramic shaft), and a compressor impeller is fitted in the small diameter shaft part /B beyond the stepped part /A,
The impeller is brought into contact with the stepped part /A, and the impeller is fixed by tightening a nut 3 to a threaded part /C threaded on the end of the shaft part /B. 3 indicates a bearing member for shaft l.
しかしながら、このような従来の圧縮機インペラのセラ
ミック軸との取付は構造においては、セラミック軸／の
軸端に刻設したねじ部ＩＣにナツト３を螺着することに
よりインペラ２を固定するようになっているので、セラ
ミック軸／のねじ加工にコストがかかるのみならず、こ
のねじ部ＩＣにかかるナツト３の締結力と、一般にはア
ルミニウム合金等で形成されている圧縮機インペラ２が
熱膨張するので、ナツト３を介してねじ部ＩＣに集中す
る引張り応力のためにねじ部／Ｃが破損し易い。However, in terms of structure, the structure of attaching such a conventional compressor impeller to a ceramic shaft is such that the impeller 2 is fixed by screwing a nut 3 into a threaded part IC cut into the shaft end of the ceramic shaft. Therefore, not only is the cost of threading the ceramic shaft expensive, but the tightening force of the nut 3 applied to this threaded portion IC and the compressor impeller 2, which is generally made of aluminum alloy, will thermally expand. Therefore, the threaded portion /C is likely to be damaged due to the tensile stress concentrated on the threaded portion IC via the nut 3.
本発明の目的は、上述した欠点を除去し、廉価で得られ
、しかも破損を生じる虞れのないインペラのセラミック
軸取付は構造を提供することにある。SUMMARY OF THE INVENTION The object of the present invention is to eliminate the above-mentioned drawbacks and to provide a structure for mounting an impeller on a ceramic shaft that is inexpensive and free from damage.
かかる目的を達成するために、本発明では、インペラを
嵌め合わすセラミック軸の端部とインペラの取付は孔と
の間に金属スリーブを介装するようになし、この金属ス
リーブの嵌め合わせる側の端部をインペラのディフュー
ザ側ハブの面よりタービン側に延在させて、延在させた
端部にセラミック軸の係止溝と係合する係合部を設ける
と共に他端部にねじ部を形成し、セラミック軸に嵌め合
わせた金属スリーブをインペラの数句は孔に嵌合してス
リーブのねじ部にナツトを螺締し、インペラをスリーブ
外周に設けた段付き部に圧接させるように構成する。In order to achieve this object, in the present invention, a metal sleeve is interposed between the end of the ceramic shaft into which the impeller is fitted and the impeller mounting hole, and the end of the metal sleeve on the fitting side A part extends from the surface of the diffuser side hub of the impeller toward the turbine side, and an engaging part that engages with a locking groove of the ceramic shaft is provided at the extended end, and a threaded part is formed at the other end. A metal sleeve fitted to the ceramic shaft is fitted into several holes of the impeller, and a nut is screwed into the threaded part of the sleeve, so that the impeller is brought into pressure contact with the stepped part provided on the outer periphery of the sleeve.
以下に、図面に基づいて本発明の詳細な説明する。The present invention will be described in detail below based on the drawings.
第２図は本発明の一実施例を示し、ここで／／はねじ部
／ノとスリーブ部／３とからなる金属製スリーブ部材で
あり、セラミック軸／の端部に嵌め合わせるスリーブ部
１３をインペラーから図で右方に延在させ、延在部／３
Ａの外径を数句は孔ＪＡとの嵌め合い部／３ Ｂの外
径より大きくなして、インペラーのディフューザ側ハブ
の端面、２Ａの位置で延在部／Ｊ Ａと嵌め合い部／３
Ｂとの境に段付き部／Ｊ Ｃを形成する。／３ Ｄは
延在部／３ Ａの端部内周面に沿って突設した保合部で
あり、更に／りは第３図に示すように延在部／３ Ａか
ら嵌め合い部／３ Ｂの途中ないし嵌め合い部／３ Ｂ
全体にかけて刻設した複数條からなる軸対称のスリット
である。しかしてスリーブ部／３に嵌め合わせるセラミ
ック軸／には、延在部／３ Ａに突設した係合部／３１
）と対応する位置に全周にわたる環状の係止溝７３を刻
設しておく。なお、ここで係合部／３ 、・Ｄはその突
出部の断面形状を滑らかな円弧形状に形成し、これに対
応する溝１５の断面形状もまた係合部／３ Ｄの形状に
合わせて形成しておく。FIG. 2 shows an embodiment of the present invention, in which // is a metal sleeve member consisting of a threaded part / and a sleeve part /3, and the sleeve part 13 is fitted onto the end of the ceramic shaft. Extend from the impeller to the right in the figure, extension part / 3
The outer diameter of A is larger than the outer diameter of hole JA, and the end face of the hub on the diffuser side of the impeller extends at position 2A.
Form a stepped part/JC on the border with B. /3 D is a retaining part protruding along the inner circumferential surface of the end of the extending part /3 A, and /3 is a fitting part /3 from the extending part /3 A as shown in Fig. 3. Midway or fitting part of B/3 B
It is an axially symmetrical slit consisting of multiple grooves carved throughout. Therefore, the ceramic shaft/3 fitted into the sleeve part/3 has an engaging part/31 protruding from the extending part/3A.
) is provided with an annular locking groove 73 extending all around the circumference. Note that the cross-sectional shape of the protrusion of the engaging portion /3,·D is formed into a smooth circular arc shape, and the cross-sectional shape of the corresponding groove 15 is also adapted to the shape of the engaging portion /3·D. Form it.
このように構成した数句は構造によりインペラコをセラ
ミック軸／に取付けるにあたっては、まずセラミック軸
／の端部をスリーブ部材／／のスリーブ部／３に嵌め込
み、その延在部／ＪＡに設けた係合部／３ Ｄをセラミ
ック軸／の係止溝／ｊに嵌め入れる。Due to the structure of the above structure, in order to attach the impeller to the ceramic shaft/, the end of the ceramic shaft/ is first fitted into the sleeve part/3 of the sleeve member//, and the engagement provided on the extension part/JA is Fit the joint part /3D into the locking groove /j of the ceramic shaft /.
この際、スリーブ部／３にはスリット／りが設けられて
いるのでスリットフグにより分岐された各スリーブ部／
３の片があたかもばね材の役目をなし、係合部／３ Ｄ
がいったん溝／３に嵌め入れられた後は、このばね力に
よってその係止状態を保つ。次いでインペラＪＱ高湿と
なしてスリーブ部／３の嵌め合い部７３ Ｂにインペラ
２を焼き嵌めし、段付き部／３ Ｃにインペラ２の背面
を当接させてナツト３をねじ部／２に螺着し、ねじ作用
によりインベラコを段付き部／３ Ｃに押圧させる。At this time, since the sleeve part /3 is provided with a slit, each sleeve part /3 is branched by the slit puffer.
The piece 3 acts as a spring material, and the engaging part/3D
Once it is fitted into the groove /3, the spring force keeps it locked. Next, shrink-fit the impeller 2 to the fitting part 73B of the sleeve part/3 with the impeller JQ high humidity, bring the back of the impeller 2 into contact with the stepped part/3C, and tighten the nut 3 to the threaded part/2. Screw it on and press the inveraco against the stepped part/3C by the screw action.
第１図は本発明の他の実施例を示し、ここで、′／３Ｅ
はスリーブ部１３の延在部／３ Ａ端部に設けた係合部
であり、’／ｊＥはセラミック軸／において、係合部／
３ Ｅと対応する位置に周設した係止溝である。FIG. 1 shows another embodiment of the invention, where '/3E
is an engaging portion provided at the extending portion /3A end of the sleeve portion 13, and '/jE is an engaging portion provided on the ceramic shaft/.
3 This is a locking groove provided around the position corresponding to E.
本例は係合部／３ Ｅおよび係止溝／Ｊ Ｅの断面形状
を第一図で示した例よりも更に幅広い緩やかな曲線の円
弧型としたものであり、この係止溝Ｂ Ｅに発生する面
圧を低減させることによりセラミック軸／のこの部位に
生ずる応力の集中を緩和させることができる。In this example, the cross-sectional shapes of the engaging portion /3E and the locking groove /JE are wider and gently curved arc-shaped than the example shown in Fig. 1. By reducing the generated surface pressure, the concentration of stress occurring at this portion of the ceramic shaft can be alleviated.
なお、以上の説明では係合部および係止溝をスリーブ部
の延在部端部の内周面およびセラミック軸の外周面の全
周にわたり設ける場合について述べたが、全周に限らず
、図には示さないが、例えばそれぞれの周においてｌな
し礼−数の箇所で係合部および係止溝を中断するように
して、残りの各周囲部分にのみそれぞれ係合部および係
止溝を設けて係合させるようにすることもできる。この
ようにすれば金属スリーブ部材がセラミック軸の回りに
回動する傾向を拘束することができる。In addition, in the above explanation, the case where the engaging part and the locking groove are provided all the way around the inner circumferential surface of the end of the extending part of the sleeve part and the outer circumferential surface of the ceramic shaft has been described. Although not shown, for example, the engaging portions and locking grooves may be interrupted at a certain number of points on each circumference, and the engaging portions and locking grooves may be provided only in the remaining peripheral portions. It is also possible to make the engagement occur. In this way, the tendency of the metal sleeve member to rotate around the ceramic axis can be restrained.
以上説明してきたように、本発明によれば、セラミック
軸を貫通させるインペラ取付は孔とセラミック軸との間
に嵌め合わすようにしたスリーブ部と、これと一体のね
じ部とを有する金属製スリーブ部材を設け、このスリー
ブ部をインペラとの嵌め合い部から端部を延在して、そ
の延在部の端部内周に沿′つて滑らかな曲線−面の係合
部を突設置ると共に、嵌め合い部と延在部との境界のス
リーブ部外周にインペラを当接させる段付き部を形成し
、一方セラミック軸にはスリーブ部材の保合部と対応す
る位置に保合部の形状に合わせた係止溝を設けて、保合
部を係止部に係合させることによりスリーブ部材をセラ
ミック軸に位置決め固定すると共に、スリーブ部材の嵌
め合い部にインペラを焼き嵌めして段付き部に当接させ
、そのねじ部にナツトを螺着して締結するようにしたの
で、による応力集中のためにセラミック軸が破損する虞
りがなく、更にスリットにより分岐させたフリーブ部が
ばね力によりその係合部を係止溝に係合させた構成とし
たので、インペラの熱膨張゛により発生する応力もこの
スリーブ部を介してセラミック軸に伝達されるので、ス
リーブ部の有するばね効果によって緩和され、インペラ
を破損・から守る。As explained above, according to the present invention, the impeller is mounted through a ceramic shaft using a metal sleeve having a sleeve portion that fits between the hole and the ceramic shaft, and a threaded portion integral with the sleeve portion. A member is provided, the end of the sleeve portion extends from the fitting portion with the impeller, and an engaging portion with a smooth curved surface is protruded along the inner periphery of the end of the extending portion, and A stepped part is formed on the outer periphery of the sleeve part at the boundary between the fitting part and the extension part, and the impeller comes into contact with the stepped part, and a stepped part is formed on the ceramic shaft at a position corresponding to the retaining part of the sleeve member to match the shape of the retaining part. The sleeve member is positioned and fixed on the ceramic shaft by providing a locking groove and engaging the retaining portion with the locking portion, and the impeller is shrink-fitted to the fitting portion of the sleeve member and abuts against the stepped portion. Since the ceramic shaft is connected to the ceramic shaft by screwing a nut onto the threaded part, there is no risk of the ceramic shaft being damaged due to stress concentration, and furthermore, the freeb part branched by the slit is prevented from being engaged by the spring force. Since the mating part is configured to engage with the locking groove, the stress generated by the thermal expansion of the impeller is also transmitted to the ceramic shaft via the sleeve part, so it is alleviated by the spring effect of the sleeve part. Protects the impeller from damage.
更にまた係合部と係止溝とは互いに滑らかな形状をなし
、かつばね力により圧接された状態を保つので、この係
止溝の部位に過大な応力集中が発生しない。Furthermore, since the engaging portion and the locking groove have a smooth shape and are maintained in pressure contact with each other by the spring force, excessive stress concentration does not occur at the portion of the locking groove.
ｉ／図は従来のインペラのセラミック軸取付は構造の一
例を示す断面図、第２図は本発明インペラのセラミック
軸取付は構造の一例を示す断面図、第３図はその取付は
構造を分解して示す斜視図、第７図は本発明の他の実施
例における係合部と係止溝の断面図である。
／・・・セラミック軸、 ／Ａ・・・段付き部、／Ｂ
・・・小径軸部、 ／Ｃ・・・ねじ部、２・・・
インペラ、 ％Ａ・・・取付は孔、３・・・ナツ
ト、 グ・・・軸受部材、／／・・・スリー
ブ部材、 ／ｌ・・・ねじ部、／３・・・スリーブ
部、／３Ａ・・・延在部、／、？Ｂ・・・嵌め合い部、
／３Ｃ・・・段付き部、／３’Ｄ 、 ／３Ｅ・
・・係合部、 ／ｌ・・・ス、リット、／３ 、
／！；Ｅ・・・溝。
特許出願−人 日産自動車株式会社Figure i is a cross-sectional view showing an example of the structure of a conventional impeller with a ceramic shaft attached to it, Figure 2 is a cross-sectional view of an example of the structure of a ceramic shaft of the impeller of the present invention, and Figure 3 is an exploded view of the structure of the impeller. FIG. 7 is a sectional view of an engaging portion and a locking groove in another embodiment of the present invention. /...Ceramic shaft, /A...Stepped part, /B
...Small diameter shaft part, /C...Thread part, 2...
Impeller, %A...Mounting hole, 3...Nut, G...Bearing member, //...Sleeve member, /l...Threaded part, /3...Sleeve part, /3A ...extension part, /,? B...fitting part,
/3C...Stepped part, /3'D, /3E・
...Engagement part, /l...s, lit, /3,
/! ;E...Groove. Patent Application - Person Nissan Motor Co., Ltd.
Claims (1)
わせ、ナツトを螺締して固着するようにしたインペラの
セラミック軸取付は構造において、スリーブ部とねじ部
とを同一軸心上に一体に形成した金属スリーブ部材の前
記スリーブ部に前記軸心方向のスリットを設け、前記ス
リーブ部を前記インペラの取付！す孔と前記セラミック
軸との間に嵌め合わせる七共に、前記スリーブ部の前記
インペラとの嵌め合い部より延在させた端部の内周面の
周方向に突設した係合部を、該係合部に対応して前記イ
ンペラの外周の部位に設けた係止溝に係合させて前記金
属スリーブを前記セラミック軸に固定し、前記インペラ
を前記金属スリーブ部材に設けた段付き部に当接させて
、前記ねじ部に前記ナツトを螺着して、前記インペラを
前記段付き部に圧接させるようにしたことを特徴とする
インペラのセラミック軸取付は構造。The impeller is installed by passing the ceramic shaft through the hole, fitting it, and screwing a nut to secure it.The structure of the impeller's ceramic shaft installation is that the sleeve part and threaded part are integrally formed on the same axis. A slit in the axial direction is provided in the sleeve portion of the metal sleeve member, and the impeller is attached to the sleeve portion! An engaging portion protruding in the circumferential direction of the inner circumferential surface of the end portion of the sleeve portion extending from the fitting portion with the impeller is fitted between the hole and the ceramic shaft. The metal sleeve is fixed to the ceramic shaft by engaging with a locking groove provided on the outer periphery of the impeller corresponding to the engaging portion, and the impeller is brought into contact with a stepped portion provided on the metal sleeve member. The impeller ceramic shaft mounting structure is characterized in that the impeller is brought into pressure contact with the stepped part by screwing the nut onto the threaded part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10130382A JPS58220901A (en) | 1982-06-15 | 1982-06-15 | Installing structure of impeller onto ceramic shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10130382A JPS58220901A (en) | 1982-06-15 | 1982-06-15 | Installing structure of impeller onto ceramic shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58220901A true JPS58220901A (en) | 1983-12-22 |
| JPH0424522B2 JPH0424522B2 (en) | 1992-04-27 |
Family
ID=14297039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10130382A Granted JPS58220901A (en) | 1982-06-15 | 1982-06-15 | Installing structure of impeller onto ceramic shaft |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58220901A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61104102A (en) * | 1984-10-29 | 1986-05-22 | Ishikawajima Harima Heavy Ind Co Ltd | Rotor of gas bearing-supported turbo machine |
| US4915589A (en) * | 1988-05-17 | 1990-04-10 | Elektroschmelzwerk Kempten Gmbh | Runner with mechanical coupling |
| US6431781B1 (en) * | 2000-06-15 | 2002-08-13 | Honeywell International, Inc. | Ceramic to metal joint assembly |
| KR100414102B1 (en) * | 2001-08-17 | 2004-01-07 | 엘지전자 주식회사 | Structure for engaging impeller in turbo compressor |
| GB2498748A (en) * | 2012-01-24 | 2013-07-31 | Napier Turbochargers Ltd | Impeller to shaft connection system |
| WO2013122000A1 (en) * | 2012-02-13 | 2013-08-22 | 三菱重工コンプレッサ株式会社 | Impeller and rotating machine provided with same |
| CN104314857A (en) * | 2014-07-17 | 2015-01-28 | 苏州卓诚钛设备有限公司 | Fan shaft |
| WO2015146765A1 (en) * | 2014-03-26 | 2015-10-01 | 株式会社Ihi | Impeller fastening structure and turbo compressor |
| WO2019225143A1 (en) * | 2018-05-24 | 2019-11-28 | 株式会社Ihi | Rotating body and supercharger |
| US11028698B1 (en) * | 2018-06-22 | 2021-06-08 | Florida Turbine Technologies, Inc. | Ceramic radial turbine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56159600A (en) * | 1980-05-09 | 1981-12-08 | Mitsubishi Heavy Ind Ltd | Impeller fitting structure |
-
1982
- 1982-06-15 JP JP10130382A patent/JPS58220901A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56159600A (en) * | 1980-05-09 | 1981-12-08 | Mitsubishi Heavy Ind Ltd | Impeller fitting structure |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61104102A (en) * | 1984-10-29 | 1986-05-22 | Ishikawajima Harima Heavy Ind Co Ltd | Rotor of gas bearing-supported turbo machine |
| US4915589A (en) * | 1988-05-17 | 1990-04-10 | Elektroschmelzwerk Kempten Gmbh | Runner with mechanical coupling |
| US6431781B1 (en) * | 2000-06-15 | 2002-08-13 | Honeywell International, Inc. | Ceramic to metal joint assembly |
| KR100414102B1 (en) * | 2001-08-17 | 2004-01-07 | 엘지전자 주식회사 | Structure for engaging impeller in turbo compressor |
| GB2498748A (en) * | 2012-01-24 | 2013-07-31 | Napier Turbochargers Ltd | Impeller to shaft connection system |
| GB2498748B (en) * | 2012-01-24 | 2017-07-26 | Napier Turbochargers Ltd | Connection system |
| US9951627B2 (en) | 2012-02-13 | 2018-04-24 | Mitsubishi Heavy Industries Compressor Corporation | Impeller and rotating machine provided with same |
| WO2013122000A1 (en) * | 2012-02-13 | 2013-08-22 | 三菱重工コンプレッサ株式会社 | Impeller and rotating machine provided with same |
| CN103958899A (en) * | 2012-02-13 | 2014-07-30 | 三菱重工压缩机有限公司 | Impeller and rotating machine provided with same |
| US11073020B2 (en) | 2012-02-13 | 2021-07-27 | Mitsubishi Heavy Industries Compressor Corporation | Impeller and rotating machine provided with same |
| WO2015146765A1 (en) * | 2014-03-26 | 2015-10-01 | 株式会社Ihi | Impeller fastening structure and turbo compressor |
| CN104314857A (en) * | 2014-07-17 | 2015-01-28 | 苏州卓诚钛设备有限公司 | Fan shaft |
| WO2019225143A1 (en) * | 2018-05-24 | 2019-11-28 | 株式会社Ihi | Rotating body and supercharger |
| CN111989470A (en) * | 2018-05-24 | 2020-11-24 | 株式会社Ihi | Rotating body and supercharger |
| JPWO2019225143A1 (en) * | 2018-05-24 | 2021-03-11 | 株式会社Ihi | Rotating body and supercharger |
| US11421581B2 (en) | 2018-05-24 | 2022-08-23 | Ihi Corporation | Rotating body and turbocharger |
| US11028698B1 (en) * | 2018-06-22 | 2021-06-08 | Florida Turbine Technologies, Inc. | Ceramic radial turbine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0424522B2 (en) | 1992-04-27 |
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