JPH04171298A - Supercharger - Google Patents

Supercharger

Info

Publication number
JPH04171298A
JPH04171298A JP29642490A JP29642490A JPH04171298A JP H04171298 A JPH04171298 A JP H04171298A JP 29642490 A JP29642490 A JP 29642490A JP 29642490 A JP29642490 A JP 29642490A JP H04171298 A JPH04171298 A JP H04171298A
Authority
JP
Japan
Prior art keywords
rotating shaft
journal
inner race
contact surface
turbine impeller
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
Application number
JP29642490A
Other languages
Japanese (ja)
Other versions
JP2815697B2 (en
Inventor
Takaya Yoshikawa
孝哉 吉川
Noboru Ishida
昇 石田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Niterra Co Ltd
Original Assignee
NGK Spark Plug Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NGK Spark Plug Co Ltd filed Critical NGK Spark Plug Co Ltd
Priority to JP29642490A priority Critical patent/JP2815697B2/en
Publication of JPH04171298A publication Critical patent/JPH04171298A/en
Application granted granted Critical
Publication of JP2815697B2 publication Critical patent/JP2815697B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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  • Supercharger (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

PURPOSE:To restrain balance change in turbine impeller by providing a metallic recessed part and a metallic journal part which is rotatably supported so that the innermost dimension of the welded part, of a rotating shaft which is jointed by means of a welding technique and the innermost dimension of the contact surface of an inner race which comes into contact with the rotating shaft may satisfy a specific relation. CONSTITUTION:A protruding part, 11 in a turbine impeller 3 is fitted in an edge part on the turbine side, a recessed part 12 which is jointed with the protruding part 11 is provided, and the metal of the recessed part 12 and metal of a journal part 13 which is supported by a supporting structure 6 are jointed by means of a welding technique to constitute a rotating shaft 4. The edge surface on the turbine impeller 3 side of an inner race 16 is made a contact surface 22 which comes into contact with the rotating shaft 4. Besides, the innermost dimension D1 of a welded part 23 of the recessed part 12 and the journal part 13 is set so that the relation between the innermost dimension D1 and the innermost dimension D2 of the contact surface 22 which comes into contact with the rotating shaft 4 may satisfy the formula; D1/D2 <0.9. Therefore, it is thus possible to heighten joint strength between the recessed part and the journal part, and restrain change in rotating balance of the turbine impeller.

Description

【発明の詳細な説明】 [産業上の利用分野コ 本発明は、セラミック製のタービン肩車と、金属製の回
転軸とを凸部と凹部とによって接合し、ナツトの締め付
は力が回転軸を支持する転がりベアリングのインナーレ
ースを介して凹部側を押さえ付ける構造を備えた過給機
に関し、ターボチャージャやガスタービンに用いて好適
なものである。
DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Fields] The present invention connects a ceramic turbine shoulder wheel and a metal rotating shaft through a convex portion and a concave portion, and tightens a nut by applying force to the rotating shaft. This supercharger is suitable for use in turbochargers and gas turbines.

[従来の技術] 過給機の一例として、ターボチャージャが知られている
[Prior Art] A turbocharger is known as an example of a supercharger.

従来のターボチャージャには、応答性を良くするために
、セラミック製のタービン肩車を用い、さらに回転軸を
転がり軸受けによって支持したものがある。
Some conventional turbochargers use ceramic turbine shoulder wheels and further support the rotating shaft with rolling bearings in order to improve responsiveness.

回転軸は、金属よりなる。そして、タービン肩車と回転
軸とは、タービン肩車の凸軸と、回転軸の端部に設けら
れた凹部とを嵌め合わせ、接合することによって固着さ
れている。なお、回転軸は、タービン肩車を強固に保持
する金属(凹部)と、軸受けによって支持される金属(
ジャーナル部)とを、溶接によって接合したものである
The rotating shaft is made of metal. The turbine shoulder wheel and the rotating shaft are fixed to each other by fitting and joining the convex shaft of the turbine shoulder wheel to a recess provided at an end of the rotating shaft. Note that the rotating shaft consists of a metal (recess) that firmly holds the turbine shoulder wheel, and a metal (recess) that is supported by a bearing.
(journal part) are joined by welding.

また、転がり軸受けは、タービン羽車側のインナーレー
スと、コンプレッサ羽車側のインナーレースとの間に、
スリーブを配した構造を有する。
In addition, in the rolling bearing, between the inner race on the turbine impeller side and the inner race on the compressor impeller side,
It has a structure with a sleeve.

そして、コンプレッサ羽車を挿入した側の回転軸の端部
にナツトを締付け、ナツトの締付は力によって、2つの
インナーレース、スリーブ、コンプレッサ羽車が、ナツ
トと凹部との間に挟まれて回転軸に固着されている。
Then, a nut is tightened on the end of the rotating shaft on the side where the compressor impeller is inserted, and the tightening of the nut is done by force, so that the two inner races, sleeve, and compressor impeller are sandwiched between the nut and the recess. Fixed to the rotating shaft.

[発明が解決しようとする課題] ナツトの締付けによって発生する軸力は、500〜1s
ookgと強い、このため、インナーレースのタービン
羽車側の端面(当接面)が回転軸に当接して、当接する
回転軸をタービン肩車の方向へ押さえ付ける力を発生す
る6つまり、ナツトの締付はトルクによって、インナー
レースに当接する回転軸の受は面に強い荷重が加えられ
、結果的に溶接部に応力集中が生じる。特に、当接面の
内径の応力値が高い。
[Problem to be solved by the invention] The axial force generated by tightening the nut is 500 to 1 s.
As a result, the end surface (contact surface) of the inner race on the turbine impeller side comes into contact with the rotating shaft, generating a force that presses the abutting rotating shaft toward the turbine shoulder wheel.6 In other words, the nut's Due to the tightening torque, a strong load is applied to the surface of the rotating shaft bearing that contacts the inner race, resulting in stress concentration in the welded area. In particular, the stress value on the inner diameter of the contact surface is high.

溶接部の内径は、外径に比較して接合面積が小さく、接
合強度が外径側に比較して弱い。このため、溶接部の最
内径付近に応力集中が生じると、凹部とジャーナル部と
の接合強度が低下するなめ、外部から応力が加わった場
合に、接合部が変形しやすくなり、タービン肩車などに
回転バランスの変化が生じやすくなる。
The inner diameter of the welded portion has a smaller bonding area than the outer diameter, and has weaker bonding strength than the outer diameter. For this reason, if stress concentration occurs near the innermost diameter of the weld, the strength of the joint between the recess and the journal will decrease, making the joint more likely to deform when stress is applied from the outside, causing damage to turbine shoulder wheels, etc. Changes in rotational balance are likely to occur.

本発明の目的は、ナツトによって強固に締め付けられて
も、タービン肩車のバランス変化を抑えな過給機の提供
にある。
SUMMARY OF THE INVENTION An object of the present invention is to provide a supercharger that suppresses changes in the balance of a turbine shoulder even when tightly tightened with a nut.

[課題を解決するための手段] 上記の目的を達成するために、本発明の過給機は、次の
2つの技術的手段を採用する。
[Means for Solving the Problems] In order to achieve the above object, the supercharger of the present invention employs the following two technical means.

(第1発明) 過給機は、端部に凸部を備えたセラミック製のタービン
肩車と、前記凸部に、接合された金属製の凹部と回転自
在に支持される金属製のジャーナル部とを溶接技術によ
って接合した回転軸と、前記タービン羽車側の端面が前
記回転軸に当接する当接面を有するインナーレースを備
え、前記ジャーナル部を回転自在に支持する転がり軸受
けと、前記回転軸の端部の周囲に装着されるコンプレッ
サ羽車と、前記回転軸の端部の周囲に形成されたオネジ
部に締付けられ、前記凹部との間で前記転がり軸受けの
前記インナーレースおよび前記コンプレッサ羽車を挟み
付けるナツトとを備える。
(First invention) A supercharger includes a ceramic turbine shoulder wheel having a convex portion at an end, a metal concave portion joined to the convex portion, and a metal journal portion rotatably supported. a rotating shaft joined by a welding technique; a rolling bearing that rotatably supports the journal portion and includes an inner race having a contact surface whose end face on the turbine impeller side abuts the rotating shaft; and a rolling bearing that rotatably supports the journal part; The inner race of the rolling bearing and the compressor impeller are tightened to a male screw portion formed around the end of the rotating shaft and are connected between the inner race of the rolling bearing and the recess. It is equipped with a nut to hold the.

そして、前記凹部と前記ジャーナル部との溶接部の最内
径寸法D1と、前記回転軸に当接する前配当接面の最内
径寸法D2どの関係が、DI/D2 <0.9を満足す
るように設けられる。
The relationship between the innermost diameter dimension D1 of the welded portion between the concave portion and the journal portion and the innermost diameter dimension D2 of the front joint contact surface that abuts the rotating shaft is such that DI/D2 <0.9 is satisfied. provided.

(第2発明) 過給機は、端部に凸部を備えたセラミック製のタービン
羽車と、前記凸部に、接合された金属製の凹部と回転自
在に支持される金属製のジャーナル部とを溶接技術によ
って接合した回転軸と、前記タービン羽車側の端面が前
記回転軸に当接する当接面を有するインナーレースを備
え、前記ジャーナル部を回転自在に支持する転がり軸受
けと、前記回転軸の端部の周囲に装着されるコンプレッ
サ羽車と、前記回転軸の端部の周囲に形成されたオネジ
部に締付けられ、前記凹部との間で前記転がり軸受けの
前記インナーレースおよび前記コンプレッサ羽車を挟み
付けるナツトとを備える。
(Second invention) A supercharger includes a ceramic turbine impeller having a convex portion at an end, a metal concave portion joined to the convex portion, and a metal journal portion rotatably supported by the convex portion. a rotating shaft joined by a welding technique; a rolling bearing that rotatably supports the journal portion and includes an inner race having an abutment surface whose end face on the turbine impeller side abuts the rotating shaft; The inner race of the rolling bearing and the compressor impeller are tightened to a male thread formed around the end of the rotating shaft, and the inner race of the rolling bearing and the compressor impeller are mounted around the end of the shaft. Equipped with a nut that clamps the car.

そして、前記インナーレースの当接面は、前記ジャーナ
ル部に当接し、前記当接面と溶接部との間に前記ジャー
ナル部が111111以上介在される。
The abutting surface of the inner race abuts the journal part, and 111111 or more of the journal parts are interposed between the abutting surface and the welding part.

[作用および発明の効果] (第1発明) 溶接部の最内径寸法D1と、当接面の最内径寸法D2ど
の関係を、DI /D2 <0.9を満足するように設
けることにより、凹部とジャーナル部との接合強度を高
くすることができる。
[Operations and Effects of the Invention] (First Invention) By setting the relationship between the innermost diameter dimension D1 of the welded portion and the innermost diameter dimension D2 of the contact surface so that DI /D2 <0.9 is satisfied, the recessed portion The bonding strength between the journal portion and the journal portion can be increased.

この結果、タービン羽車の回転バランスの変化を抑える
ことができる。
As a result, changes in the rotational balance of the turbine impeller can be suppressed.

(第2発明) 当接面と溶接部との間にジャーナル部がIm−以上介在
することによって、介在するジャーナル部が溶接部にか
かる応力を緩和する。このため、凹部とジャーナル部と
の接合強度を高くすることができる。
(Second Invention) By interposing the journal portion between the abutment surface and the welded portion by more than Im−, the interposed journal portion relieves the stress applied to the welded portion. Therefore, the bonding strength between the recess and the journal portion can be increased.

この結果、タービン羽車の回転バランスの変化を抑える
ことができる。
As a result, changes in the rotational balance of the turbine impeller can be suppressed.

[実施例] 次に、本発明をターボチャージャに適用した実施例に基
づき、図面を用いて説明する。
[Example] Next, an example in which the present invention is applied to a turbocharger will be described with reference to the drawings.

(実施例の構成) 第1図はタービン羽車と回転軸の断面図、第2図はター
ボチャージャの断面図を示す。
(Configuration of Example) FIG. 1 is a sectional view of a turbine impeller and a rotating shaft, and FIG. 2 is a sectional view of a turbocharger.

ターボチャージャ1は、主に、ハウジング2と、タービ
ン羽車3が接合された回転軸4と、この回転軸4に固着
されたコンプレッサ羽車5と、回転軸4をハウジング2
内で回転自在に支持する支持構造6とから構成される。
The turbocharger 1 mainly includes a housing 2, a rotating shaft 4 to which a turbine impeller 3 is connected, a compressor impeller 5 fixed to the rotating shaft 4, and a rotating shaft 4 connected to the housing 2.
The support structure 6 is rotatably supported within the support structure 6.

ハウジング2は、排気スクロールを形成するタービンケ
ース7と、支持構造6を収納する中間ケース8と、吸気
スクロールを形成するコンプレッサケース9とからなる
3つの分割体で、複数のボルト10によって固着されて
いる。
The housing 2 is a three-part body consisting of a turbine case 7 forming an exhaust scroll, an intermediate case 8 housing the support structure 6, and a compressor case 9 forming an intake scroll, which are fixed together by a plurality of bolts 10. There is.

タービン羽車3は、例えば窒化珪素を主体とするセラミ
ック製で、軸心の端部に回転軸4と接合される凸部11
を備える。
The turbine impeller 3 is made of ceramic mainly made of silicon nitride, for example, and has a convex portion 11 connected to the rotating shaft 4 at the end of the shaft center.
Equipped with

回転軸4は、タービン側の端部にタービン羽車3の凸部
11を嵌め込み、凸部11と接合される四部12を備え
た金属製の軸体で、凸部11の周囲が凹部12の内周に
押し付けられることによって、凸部11と凹部12とが
接合されている。
The rotary shaft 4 is a metal shaft body that has four parts 12 that fit into the turbine impeller's end and are joined to the protrusions 11. The convex portion 11 and the concave portion 12 are joined by being pressed against the inner periphery.

この接合方法の一例として、本実施例では、凸部11と
凹部12とを、圧入によって接合している。
As an example of this joining method, in this embodiment, the protrusion 11 and the recess 12 are joined by press fitting.

なお、圧入しろは、数十μm〜m数百μmはどである。Note that the press-fitting margin is from several tens of micrometers to several hundred micrometers.

また、回転軸4は、凹部12の金属と、支持構造6によ
って支持されるジャーナル部13の金属とを溶接によっ
て接合したものである。具体的には、本実施例の凹部1
2は、インコロイ903製の筒体で、ジャーナル部13
は、クロム・モリブデン綱あるいはニッケル・クロム・
モリブデン網製の棒状体で、凹部12とジャーナル部1
3とが、電子ビーム溶接によって接合されている。凹部
12の底部には、貫通穴12aが設けられ、ジャーナル
部13の突起13aが挿入されて、位置決めに用いられ
ている。
Moreover, the rotating shaft 4 is made by joining the metal of the recess 12 and the metal of the journal part 13 supported by the support structure 6 by welding. Specifically, the recess 1 of this example
2 is a cylinder made of Incoloy 903, and the journal part 13
is chromium-molybdenum steel or nickel-chromium-molybdenum steel.
A rod-shaped body made of molybdenum mesh, with a concave portion 12 and a journal portion 1.
3 are joined by electron beam welding. A through hole 12a is provided at the bottom of the recess 12, into which a projection 13a of the journal portion 13 is inserted and used for positioning.

支持構造6は、2つのボールベアリング14.15を備
える。2つのボールベアリング14.15のインナーレ
ース16.17の間には、筒状のスリーブ18が配され
ていており、2つのインナーレース16.17の間隔を
保っている。
The support structure 6 comprises two ball bearings 14.15. A cylindrical sleeve 18 is arranged between the inner races 16.17 of the two ball bearings 14.15, and maintains the distance between the two inner races 16.17.

コンプレッサ羽車5は、例えばアルミニウム製で、イン
ナーオイルシール19を介して回転軸4に装着され、回
転軸4の端部のオネジ部4aにナツト20を締付けるこ
とにより、回転軸4に固着されている。つまり、ナツト
20を強いトルクで締付けることにより、ナツト20と
凹部12との間に、2つのインナーレース16.17、
スリーブ18、インナーオイルシール19、コンプレッ
サ羽車5が挾まれ、ナツト20の締付はトルクによって
コンプレッサ羽車5が回転軸4に固着される。なお、イ
ンナーオイルシール19は、外周に取り付けられたアウ
ターオイルシール21と対を成すもので、潤滑油がコン
プレッサケース9内に流出するのを防ぐものである。
The compressor impeller 5 is made of aluminum, for example, and is attached to the rotating shaft 4 via an inner oil seal 19, and is fixed to the rotating shaft 4 by tightening a nut 20 to a male thread 4a at the end of the rotating shaft 4. There is. That is, by tightening the nut 20 with a strong torque, the two inner races 16, 17,
The sleeve 18, the inner oil seal 19, and the compressor impeller 5 are interposed, and the compressor impeller 5 is fixed to the rotating shaft 4 by tightening the nut 20 with torque. Note that the inner oil seal 19 is a pair with an outer oil seal 21 attached to the outer periphery, and prevents lubricating oil from leaking into the compressor case 9.

次に、凹部12とジャーナル部13との溶接部分を説明
する。
Next, the welded portion between the recessed portion 12 and the journal portion 13 will be explained.

インナーレース16のタービン肩車3側の端面は、回転
軸4に当接する当接面22とされる。本実施例の当接面
22は、ジャーナル部13の鍔部13bに当接する。そ
して、凹部12とジャーナル部13との溶接部23の最
内径寸法D1は、回転軸4に当接する当接面22の最内
径寸法D2との関係が、Di /D2〈09の式を満足
するように設けられている。
The end surface of the inner race 16 on the turbine shoulder wheel 3 side serves as a contact surface 22 that comes into contact with the rotating shaft 4 . The contact surface 22 of this embodiment contacts the collar portion 13b of the journal portion 13. The relationship between the innermost diameter dimension D1 of the welded part 23 between the recessed part 12 and the journal part 13 and the innermost diameter dimension D2 of the contact surface 22 that contacts the rotating shaft 4 satisfies the formula Di /D2<09. It is set up like this.

また、当接面22と溶接部23との間には、上述のジャ
ーナル部13の鍔部13bが介在されている。そして、
この鍔部13bの厚さしは1111以上に設けられてい
る。
Furthermore, the flange portion 13b of the journal portion 13 described above is interposed between the contact surface 22 and the welded portion 23. and,
The thickness of this flange portion 13b is set to be 1111 mm or more.

(試験および試験結果) 次に、’DI /D2 、Lや形状等の異なる5つのテ
スト品を作成して耐久試験を行い、回転バランスの変化
を調べた。そして、そのテスト結果を次の表1に示す。
(Tests and Test Results) Next, five test products with different 'DI/D2, L, shapes, etc. were made and durability tests were conducted to examine changes in rotational balance. The test results are shown in Table 1 below.

なお、第1テスト品は第1発明および第2発明の両発明
が適用されたもので、第3図に示すように、当接面22
の最内径寸法D2を10mmに形成し、溶接部23の最
内径寸法D1を6IIImとし、鍔部13bの厚さLを
21111としたものである。
Note that the first test product was one to which both the first invention and the second invention were applied, and as shown in FIG. 3, the contact surface 22
The innermost diameter D2 of the welded portion 23 is 10 mm, the innermost diameter D1 of the welded portion 23 is 6IIIm, and the thickness L of the flange 13b is 21111.

第2テスト品は第2発明のみが適用されたもので、第4
図に示すように、当接面22の最内径寸法D2を10m
mに形成し、溶接部23の最内径寸法D1を10++m
とし、鍔部13bの厚さLを2龍としたものである。
The second test product was one to which only the second invention was applied, and the fourth test product was one to which only the second invention was applied.
As shown in the figure, the innermost diameter dimension D2 of the contact surface 22 is 10 m.
m, and the innermost diameter dimension D1 of the welded part 23 is 10++ m.
The thickness L of the flange portion 13b is 2 mm.

第3テスト品は第2発明のみが適用されたもので、第5
図に示すように、当接面22の最内径寸法D2をIon
に形成し、溶接部23の最内径寸法D1を10關とし、
鍔部13bの厚さLを2III11としたものである。
The third test product was one to which only the second invention was applied, and the fifth test product was one to which only the second invention was applied.
As shown in the figure, the innermost diameter dimension D2 of the contact surface 22 is set to Ion.
and the innermost diameter dimension D1 of the welded portion 23 is 10 degrees,
The thickness L of the flange portion 13b is 2III11.

しかるに、第2テスト品と異なり、凹部12の貫通穴1
2aの内径を1011としたものである。
However, unlike the second test product, the through hole 1 of the recess 12
The inner diameter of 2a is 1011 mm.

第4テスト品は第1発明のみが適用されたもので、第6
図に示すように、当接面22の最内径寸法D2を10−
一に形成し、溶接部23の最内径寸法D1を6−とし、
鍔部13bの厚さLを0.5uとしたものである。
The fourth test product was one to which only the first invention was applied, and the sixth test product was one to which only the first invention was applied.
As shown in the figure, the innermost diameter dimension D2 of the contact surface 22 is set to 10-
the innermost diameter dimension D1 of the welded portion 23 is 6-,
The thickness L of the flange portion 13b is 0.5u.

第5テスト品は第1発明および第2発明の両方の発明の
適用を受けないもので、第7図に示すように、当接面2
2の最内径寸法D2を10−議に形成し、溶接部23の
最内径寸法D1を10mg+とじ、鍔部13bの厚さL
を0.5醜−としたものである。
The fifth test product is one to which neither the first invention nor the second invention is applied, and as shown in FIG.
2, the innermost diameter dimension D2 of the welded portion 23 is 10 mg+, and the thickness L of the flange portion 13b is
is set to 0.5 ugliness.

(以下余白) 表1 本実験で行った耐久試験は、まず、各テスト品をターボ
チャージャ1に組み付け、5分間エンジンのアイドリン
グ運転を行い、次の5分間エンジンに50%の負荷を与
えてエンジン回転速度を250゜rpmの運転を行い、
その後5分間エンジンに100%の負荷を与えてエンジ
ン回転速度をeooorps(ターボ回転Hax150
.000rpa+)ノ運転を行うサイクル運転を、5時
間連続して行ったものである。
(Leaving space below) Table 1 In the durability test conducted in this experiment, each test product was first assembled into turbocharger 1, the engine was idled for 5 minutes, and then 50% load was applied to the engine for the next 5 minutes. Operated at a rotation speed of 250° rpm,
After that, apply 100% load to the engine for 5 minutes and increase the engine speed to eooorps (turbo rotation Hax150).
.. 000rpa+) cycle operation was performed continuously for 5 hours.

アンバランスは、頭部/背板部の回転バランスを、試験
前と試験後とで測定したもので、バランスを取った箇所
は、第1図の矢印A(頭部)と矢印B(背板部)である
。なお、単位は1g・allである。
Unbalance was measured by measuring the rotational balance of the head/back board before and after the test.The areas where balance was achieved are arrow A (head) and arrow B (back board) in Figure 1. Department). Note that the unit is 1 g·all.

(実施例の効果) 上記の表1に示されるように、第2〜4テスト品に示さ
れるように、第1発明または第2発明の一方を適用した
ものは、両発明を適用しない第5テスト品に比較して、
回転バランスの変化を抑えることができる。
(Effects of Example) As shown in Table 1 above, as shown in the second to fourth test products, the product to which either the first invention or the second invention is applied is different from the product to which both inventions are not applied. Compared to the test product,
Changes in rotational balance can be suppressed.

また、第1発明と第2発明の両発明を適用することによ
り、さらに回転バランスの変化を抑えることができる。
Further, by applying both the first invention and the second invention, changes in rotational balance can be further suppressed.

(変形例) 本実施例では、凹部12に貫通穴12aを設け、ジャー
ナル部13の突起13aを貫通穴12a内に挿入した例
を示したが、本発明は実施例に示された形状に限定され
るものではなく、例えば第8図に示すように、凹部12
とジャーナル部13との接合面がともに平面に設けたり
、第9図に示すように、凹部12に貫通穴12aを設け
るとともに、ジャーナル部13の接合面に貫通穴12a
に連通する窪み13cを設けたり、第10図に示すよう
に、凹部12に突起12bを設け、ジャーナル部13の
接合面に突起12bに嵌まり合う窪み13cを設けるな
ど、種々な形状に設けることができるものである。
(Modification) In this embodiment, a through hole 12a is provided in the recess 12, and the protrusion 13a of the journal portion 13 is inserted into the through hole 12a. However, the present invention is limited to the shape shown in the embodiment. For example, as shown in FIG.
The joint surfaces of the journal portion 13 and the journal portion 13 may be flat, or the recess 12 may have a through hole 12a, and the journal portion 13 may have a through hole 12a on the joint surface, as shown in FIG.
Various shapes may be provided, such as providing a recess 13c that communicates with the recess 13c, or providing a protrusion 12b in the recess 12 and providing a recess 13c that fits into the protrusion 12b on the joint surface of the journal portion 13, as shown in FIG. It is something that can be done.

接合例の一例として、凸部と凹部とを圧入によって接合
した例を示したが、焼嵌め、冷液め、焼嵌めろう付けな
ど、他の接合手段を用いても良い。
As an example of joining, an example was shown in which the convex part and the recessed part were joined by press fitting, but other joining means such as shrink fitting, cold liquid filling, shrink fitting brazing, etc. may be used.

複数の金属(凹部とジャーナル部)を、ビーム溶接によ
って接合した例を示したが、レーザ溶接など、他の溶接
技術によって接合しても良い。
Although an example has been shown in which a plurality of metals (the recess and the journal) are joined by beam welding, they may be joined by other welding techniques such as laser welding.

本発明をターボチャージャに適用した例を示したが、ガ
スタービンなど他の過給機に適用できるものである。
Although an example in which the present invention is applied to a turbocharger has been shown, it can be applied to other superchargers such as a gas turbine.

上記実施例に示した材質や数値は、説明のために用いた
ものであって、適宜変更可能なものである。
The materials and numerical values shown in the above embodiments are used for explanation purposes and can be changed as appropriate.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図および第7図は実施例を示すもので、第1図はタ
ービン羽車と回転軸の断面図、第2図はターボチャージ
ャの断面図、第3図ないし第7図はテスト品を示すター
ボチャージャの要部断面図である。 また、第8図ないし第10図は変形例を示すターボチャ
ージャの要部断面図である。 図中 1・・・ターボチャージャ(過給機)3・・・タ
ービン羽車 4・・・回転軸4a・・・オネジ部   
5・・・コンプレッサ羽車11・・・凸部     1
2・・・凹部13・・・ジャーナル部 14.15・・・ボールベアリング(転がり軸受け)1
6.17・・・インナーレース 20・・・ナツト    22・・・当接面23・・・
溶接部 Dl・・・溶接部の最内径寸法 D2・・・当接面の最内径寸法
Figures 1 and 7 show examples. Figure 1 is a sectional view of the turbine impeller and rotating shaft, Figure 2 is a sectional view of the turbocharger, and Figures 3 to 7 are test products. FIG. 2 is a sectional view of main parts of the turbocharger shown in FIG. Moreover, FIGS. 8 to 10 are sectional views of main parts of a turbocharger showing modified examples. In the diagram 1...Turbocharger (supercharger) 3...Turbine impeller 4...Rotating shaft 4a...Male thread part
5... Compressor impeller 11... Convex portion 1
2... Concave portion 13... Journal portion 14.15... Ball bearing (rolling bearing) 1
6.17... Inner race 20... Nut 22... Contact surface 23...
Welding part Dl...Innermost diameter dimension of welding part D2...Innermost diameter dimension of contact surface

Claims (1)

【特許請求の範囲】 1)端部に凸部を備えたセラミック製のタービン羽車と
、 前記凸部に、接合された金属製の凹部と回転自在に支持
される金属製のジャーナル部とを溶接技術によつて接合
した回転軸と、 前記タービン羽車側の端面が前記回転軸に当接する当接
面を有するインナーレースを備え、前記ジャーナル部を
回転自在に支持する転がり軸受けと、 前記回転軸の端部の周囲に装着されるコンプレッサ羽車
と、 前記回転軸の端部の周囲に形成されたオネジ部に締付け
られ、前記凹部との間で前記転がり軸受けの前記インナ
ーレースおよび前記コンプレッサ羽車を挟み付けるナッ
トと を備えた過給機において、 前記凹部と前記ジャーナル部との溶接部の最内径寸法D
1と、 前記回転軸に当接する前記当接面の最内径寸法D2との
関係が、 D1/D2<0.9を満足する ことを特徴とする過給機。 2)端部に凸部を備えたセラミック製のタービン羽車と
、 前記凸部に、接合された金属製の凹部と回転自在に支持
される金属製のジャーナル部とを溶接技術によって接合
した回転軸と、 前記タービン羽車側の端面が前記回転軸に当接する当接
面を有するインナーレースを備え、前記ジャーナル部を
回転自在に支持する転がり軸受けと、 前記回転軸の端部の周囲に装着されるコンプレッサ羽車
と、 前記回転軸の端部の周囲に形成されたオネジ部に締付け
られ、前記凹部との間で前記転がり軸受けの前記インナ
ーレースおよび前記コンプレッサ羽車を挟み付けるナッ
トと を備えた過給機において、 前記インナーレースの当接面は、前記ジャーナル部に当
接し、前記当接面と溶接部との間に前記ジャーナル部が
1mm以上介在されることを特徴とする過給機。
[Scope of Claims] 1) A ceramic turbine impeller having a convex portion at its end, a metal concave portion joined to the convex portion, and a metal journal portion rotatably supported. a rotating shaft joined by a welding technique; a rolling bearing that rotatably supports the journal portion and includes an inner race having a contact surface whose end face on the turbine impeller side contacts the rotating shaft; The inner race of the rolling bearing and the compressor impeller are connected between the compressor impeller mounted around the end of the shaft and the recess that is tightened to a male thread formed around the end of the rotating shaft. In a supercharger equipped with a nut that clamps a car, the innermost diameter dimension D of the welded part between the recessed part and the journal part
1 and an innermost diameter dimension D2 of the abutting surface that abuts the rotating shaft, a relationship satisfying D1/D2<0.9. 2) A rotating blade in which a ceramic turbine impeller with a convex portion at the end, a metal concave portion joined to the convex portion, and a metal journal portion rotatably supported are joined by welding technology. a rolling bearing that rotatably supports the journal portion and includes an inner race having a contact surface whose end surface on the turbine impeller side abuts the rotating shaft; and a rolling bearing mounted around the end of the rotating shaft. a compressor impeller, and a nut that is tightened to a male thread formed around an end of the rotating shaft and that sandwiches the inner race of the rolling bearing and the compressor impeller with the recess. In the supercharger, the contact surface of the inner race contacts the journal part, and the journal part is interposed between the contact surface and the welding part by 1 mm or more. .
JP29642490A 1990-10-31 1990-10-31 Turbocharger and turbine blade body Expired - Fee Related JP2815697B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP29642490A JP2815697B2 (en) 1990-10-31 1990-10-31 Turbocharger and turbine blade body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP29642490A JP2815697B2 (en) 1990-10-31 1990-10-31 Turbocharger and turbine blade body

Publications (2)

Publication Number Publication Date
JPH04171298A true JPH04171298A (en) 1992-06-18
JP2815697B2 JP2815697B2 (en) 1998-10-27

Family

ID=17833366

Family Applications (1)

Application Number Title Priority Date Filing Date
JP29642490A Expired - Fee Related JP2815697B2 (en) 1990-10-31 1990-10-31 Turbocharger and turbine blade body

Country Status (1)

Country Link
JP (1) JP2815697B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2006043556A1 (en) * 2004-10-19 2008-05-22 株式会社小松製作所 Turbomachine, compressor impeller used in turbomachine, and method of manufacturing turbomachine
JP2010249200A (en) * 2009-04-14 2010-11-04 Ihi Corp Tilting pad bearing and rotary machine
WO2018174103A1 (en) * 2017-03-22 2018-09-27 株式会社Ihi Rotating body, supercharger, and rotating body manufacturing method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2006043556A1 (en) * 2004-10-19 2008-05-22 株式会社小松製作所 Turbomachine, compressor impeller used in turbomachine, and method of manufacturing turbomachine
JP2010249200A (en) * 2009-04-14 2010-11-04 Ihi Corp Tilting pad bearing and rotary machine
WO2018174103A1 (en) * 2017-03-22 2018-09-27 株式会社Ihi Rotating body, supercharger, and rotating body manufacturing method
CN110418897A (en) * 2017-03-22 2019-11-05 株式会社Ihi The manufacturing method of rotary body, booster and rotary body
US11530706B2 (en) 2017-03-22 2022-12-20 Ihi Corporation Rotating body, turbocharger, and rotating body manufacturing method

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