JP6449673B2 - Turbine housing - Google Patents

Turbine housing Download PDF

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JP6449673B2
JP6449673B2 JP2015031367A JP2015031367A JP6449673B2 JP 6449673 B2 JP6449673 B2 JP 6449673B2 JP 2015031367 A JP2015031367 A JP 2015031367A JP 2015031367 A JP2015031367 A JP 2015031367A JP 6449673 B2 JP6449673 B2 JP 6449673B2
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outer cylinder
divided body
flange
turbine
welding
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JP2016153607A (en
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悟 横嶋
悟 横嶋
飯島　徹
徹 飯島
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Calsonic Kansei Corp
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本発明は、車両のターボチャージャ（ターボ過給機）に用いられる板金製のタービンハウジングに関する。   The present invention relates to a sheet metal turbine housing used for a turbocharger (turbocharger) of a vehicle.

ターボチャージャに用いられるタービンハウジングとしては、鋳造製のものが一般的である。これに対し、板金製のタービンハウジングが例えば特許文献１により開示されている。これを、図８と図９に示す。   As a turbine housing used for a turbocharger, a cast housing is generally used. On the other hand, a turbine housing made of sheet metal is disclosed in, for example, Patent Document 1. This is shown in FIGS.

図８と図９に示すように、ターボチャージャ用のタービンハウジング１は、タービンホイール６ａが入って吸入空気（吸気）Ａの入口を構成するセンターフランジ７と排気ガスＢの入口を構成する入口側フランジ８及び排気ガスＢの出口を構成する出口側フランジ９に溶接等により接続固定される板金製の内側ハウジング２及び板金製の外側ハウジング３からなる所謂二重殻構造となっている。   As shown in FIGS. 8 and 9, the turbocharger turbine housing 1 includes a center flange 7 that constitutes an inlet of intake air (intake air) A and an inlet side that constitutes an inlet of exhaust gas B in which a turbine wheel 6 a is contained. It has a so-called double shell structure comprising a sheet metal inner housing 2 and a sheet metal outer housing 3 which are connected and fixed to the flange 8 and the outlet side flange 9 constituting the outlet of the exhaust gas B by welding or the like.

内側ハウジング２がハウジング内部の排気ガスＢの流路を実質的に区画形成し、外側ハウジング３は内側ハウジング２を隙間Ｇを介して覆い、内側ハウジング２を保護すると同時に断熱し、かつ、タービンハウジング１としての剛性を高める役割を担う外殻構造体をなしている。   The inner housing 2 substantially defines the flow path of the exhaust gas B inside the housing, and the outer housing 3 covers the inner housing 2 through the gap G, protects the inner housing 2 and simultaneously insulates, and turbine housing. The outer shell structure which plays the role which raises the rigidity as 1 is comprised.

図９に示すように、内側ハウジング２は、タービンホイール６ａのタービン軸６ｂの軸線Ｌに直交する面で２分割形成された第１内側ハウジング部材２Ａと第２内側ハウジング部材２Ｂとを互いに嵌め合わせ、全周に渡って溶接により固定することで作製されている。   As shown in FIG. 9, in the inner housing 2, the first inner housing member 2A and the second inner housing member 2B, which are divided into two on the plane orthogonal to the axis L of the turbine shaft 6b of the turbine wheel 6a, are fitted together. It is manufactured by fixing by welding over the entire circumference.

また、外側ハウジング３は、タービンホイール６ａのタービン軸６ｂの軸線Ｌに直交する面で２分割形成された第１外側ハウジング部材３Ａと第２外側ハウジング部材３Ｂとを互いに嵌め合わせ、全周に渡って溶接により固定することで作製されている。   In addition, the outer housing 3 is formed by fitting a first outer housing member 3A and a second outer housing member 3B, which are divided into two on a plane perpendicular to the axis L of the turbine shaft 6b of the turbine wheel 6a, over the entire circumference. It is manufactured by fixing by welding.

そして、内側ハウジング２の第１内側ハウジング部材２Ａの一端部２ａはセンターフランジ７の内側端面７ａに溶接により接続固定され、外側ハウジング３の第１外側ハウジング部材３Ａの一端部３ａはセンターフランジ７に形成された段部７ｂに溶接により接続固定されている。また、外側ハウジング３の第２外側ハウジング部材３Ｂの他端部３ｂは出口側フランジ９に溶接により固着された出口管４に嵌められて溶接により固定され、内側ハウジング２の第２内側ハウジング部材２Ｂの他端部２ｂは、第２外側ハウジング部材３Ｂの他端部３ｂに溶接により固定されたシュラウド部材５と第２外側ハウジング部材３Ｂの他端部３ｂとの間に挿入されている。   One end 2 a of the first inner housing member 2 A of the inner housing 2 is connected and fixed to the inner end surface 7 a of the center flange 7 by welding, and one end 3 a of the first outer housing member 3 A of the outer housing 3 is connected to the center flange 7. It is connected and fixed to the formed step 7b by welding. The other end 3b of the second outer housing member 3B of the outer housing 3 is fitted into the outlet pipe 4 fixed to the outlet side flange 9 by welding and fixed by welding, and the second inner housing member 2B of the inner housing 2 is fixed. The other end portion 2b is inserted between the shroud member 5 fixed to the other end portion 3b of the second outer housing member 3B by welding and the other end portion 3b of the second outer housing member 3B.

尚、吸気側のセンターフランジ７側には外部から吸入空気Ａを取り入れる図示しないコンプレッサ等が接続され、また、排気ガスＢを放出する出口側フランジ９側には排気ガスＢの有害な汚染物質を取り除く図示しない触媒コンバータ等が接続されている。   A compressor (not shown) for taking in the intake air A from the outside is connected to the center flange 7 side of the intake side, and harmful pollutants of the exhaust gas B are connected to the outlet side flange 9 side that discharges the exhaust gas B. A catalytic converter (not shown) to be removed is connected.

特開２００７−２７９１号公報JP 2007-2791 A

前記従来のタービンハウジング１では、外側ハウジング３の第１外側ハウジング部材３Ａと第２外側ハウジング部材３Ｂが排気ガスＢの流れ方向の軸方向（タービン軸６ｂの軸線Ｌ）に垂直な部分で２分割されて、その両端部３ａ，３ｂが吸気側のセンターフランジ７と排気側の排気出口側フランジ９に固定の出口管４に溶接により一体化されている。外側ハウジング３の第１外側ハウジング部材３Ａと第２外側ハウジング部材３Ｂの溶接部分Ｅの溶接目がタービン軸６ｂの軸方向Ｌに対して垂直な方向となっているため、図９中矢印Ｄ方向に向けた応力を受け、溶接部分Ｅに割れが発生し易かった。
In the conventional turbine housing 1, the first outer housing member 3 </ b> A and the second outer housing member 3 </ b> B of the outer housing 3 are divided into two at a portion perpendicular to the axial direction of the exhaust gas B (axis L of the turbine shaft 6 b). The both end portions 3a and 3b are integrated with the outlet pipe 4 fixed to the center flange 7 on the intake side and the exhaust outlet side flange 9 on the exhaust side by welding. Since the weld line of the welded portion E of the first outer housing member 3A and the second outer housing member 3B of the outer housing 3 is perpendicular to the axial direction L of the turbine shaft 6b, the direction of arrow D in FIG. The welded portion E was easily cracked due to the stress toward the surface.

そこで、本発明は、前記した課題を解決すべくなされたものであり、溶接部分の割れを防止することができるタービンハウジングを提供することを目的とする。
Therefore, the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a turbine housing that can prevent cracking of a welded portion.

請求項１の発明は、ターボチャージャにおけるタービンハウジングであって、タービンホイールが配置される排気流路（Ｋ）を形成する内筒と、前記内筒とともに前記タービンホイールを収容するフランジと、前記内筒への排気入口を構成する排気入口側フランジと、前記内筒に対し排気出口側に位置する排気出口側フランジと、前記フランジ、前記排気入口側フランジ及び前記排気出口側フランジに固定された状態で、該内筒を完全に覆う薄板部材の外筒と、を備え、前記外筒は、前記フランジ、前記排気入口側フランジ及び前記排気出口側フランジのそれぞれに溶接された第１外筒分割体と、前記フランジ、前記排気入口側フランジ及び前記排気出口側フランジのそれぞれに溶接された第２外筒分割体と、を有し、前記第１外筒分割体及び前記第２外筒分割体は、前記タービンホイールのタービン軸の軸方向に沿って互いに溶接により固定されていることを特徴とする。
The invention according to claim 1 is a turbine housing in a turbocharger, wherein an inner cylinder that forms an exhaust passage (K) in which a turbine wheel is disposed, a flange that accommodates the turbine wheel together with the inner cylinder, An exhaust inlet side flange constituting an exhaust inlet to the cylinder, an exhaust outlet side flange located on the exhaust outlet side with respect to the inner cylinder, a state fixed to the flange, the exhaust inlet side flange, and the exhaust outlet side flange And an outer cylinder of a thin plate member that completely covers the inner cylinder, wherein the outer cylinder is welded to each of the flange, the exhaust inlet side flange, and the exhaust outlet side flange. And a second outer cylinder divided body welded to each of the flange, the exhaust inlet side flange, and the exhaust outlet side flange, and the first outer cylinder divided body and It said second outer cylinder divided body is characterized by being welded to each other along the axial direction of the turbine shaft of the turbine wheel.

請求項２の発明は、請求項１記載のタービンハウジングであって、前記第１外筒分割体と前記第２外筒分割体の少なくとも一方の端部には、段差部が形成され、前記段差部には、他方の端部が溶接により固定されていることを特徴とする。
A second aspect of the present invention is the turbine housing according to the first aspect , wherein a step portion is formed at at least one end of the first outer cylinder divided body and the second outer cylinder divided body , and the step The other end is fixed to the part by welding.

請求項３の発明は、請求項１記載のタービンハウジングであって、前記第１外筒分割体と前記第２外筒分割体の少なくとも一方の端部には、外側または内側に折り曲げられた折曲部が形成され、前記折曲部には、他方の端部が溶接により固定されていることを特徴とする。
A third aspect of the present invention is the turbine housing according to the first aspect , wherein at least one end of the first outer cylinder divided body and the second outer cylinder divided body is folded outward or inward. A bent portion is formed, and the other end of the bent portion is fixed by welding.

請求項１の発明によれば、タービンホイールのタービン軸の軸方向に沿って外筒を構成する複数の薄板部材同士を溶接により固定することによって、溶接部分の割れを防止する。
According to invention of Claim 1, the crack of a welding part is prevented by fixing several thin-plate members which comprise an outer cylinder along the axial direction of the turbine shaft of a turbine wheel by welding.

請求項２の発明によれば、薄板部材の少なくとも一方の端部には、段差部が形成され、段差部には、隣接する薄板部材の他方の端部が溶接により固定されていることにより、複数の薄板部材の隣接する端部同士を簡単かつ確実に溶接して固定することができる。   According to the invention of claim 2, a step portion is formed on at least one end portion of the thin plate member, and the other end portion of the adjacent thin plate member is fixed to the step portion by welding, Adjacent ends of a plurality of thin plate members can be easily and reliably welded and fixed.

請求項３の発明によれば、薄板部材の少なくとも一方の端部には、外側または内側に折り曲げられた折曲部が形成され、折曲部には、隣接する薄板部材の他方の端部が溶接により固定されていることにより、複数の薄板部材の隣接する端部同士を簡単かつ確実に溶接して固定することができる。   According to the invention of claim 3, at least one end portion of the thin plate member is formed with a bent portion bent outward or inward, and the other end portion of the adjacent thin plate member is formed in the bent portion. By being fixed by welding, adjacent end portions of the plurality of thin plate members can be easily and reliably welded and fixed.

本発明の一実施形態のターボチャージャに用いられる板金製のタービンハウジングを示す側面図である。It is a side view which shows the turbine housing made from sheet metal used for the turbocharger of one Embodiment of this invention. 本発明の一実施形態の板金製のタービンハウジングの要部の拡大断面図である。It is an expanded sectional view of the important section of the turbine housing made from sheet metal of one embodiment of the present invention. （ａ）は上記タービンハウジングの外筒の接合状態を示す要部の部分断面図、（ｂ）は同外筒の他の接合状態を示す要部の部分断面図である。(A) is the fragmentary sectional view of the principal part which shows the joining state of the outer cylinder of the said turbine housing, (b) is the fragmentary sectional view of the principal part which shows the other joining state of the same outer cylinder. （ａ）〜（ｅ）は外筒の接合状態の他の変形例を示す要部の断面図である。(A)-(e) is sectional drawing of the principal part which shows the other modification of the joining state of an outer cylinder. （ａ）〜（ｇ）は外筒の接合状態の更に他の変形例を示す要部の断面図である。(A)-(g) is sectional drawing of the principal part which shows the other modification of the joining state of an outer cylinder. （ａ）〜（ｇ）は外筒の接合状態の別の変形例を示す要部の断面図である。(A)-(g) is sectional drawing of the principal part which shows another modification of the joining state of an outer cylinder. （ａ）〜（ｅ）は外筒の接合状態の更に別の変形例を示す要部の断面図である。(A)-(e) is sectional drawing of the principal part which shows another modification of the joining state of an outer cylinder. 従来のターボチャージャに用いられる板金製のタービンハウジングの側面図である。It is a side view of the sheet metal turbine housing used for the conventional turbocharger. 上記従来のタービンハウジングの要部の断面図である。It is sectional drawing of the principal part of the said conventional turbine housing.

以下、本発明の一実施形態を図面に基づいて説明する。   Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

図１は本発明の一実施形態のターボチャージャに用いられる板金製のタービンハウジングを示す側面図、図２は要部の拡大断面図、図３（ａ）は同タービンハウジングの外筒の接合状態を示す要部の部分断面図、図３（ｂ）は同外筒の他の接合状態を示す要部の部分断面図である。   FIG. 1 is a side view showing a sheet metal turbine housing used in a turbocharger according to an embodiment of the present invention, FIG. 2 is an enlarged sectional view of a main part, and FIG. 3A is a joined state of an outer cylinder of the turbine housing. FIG. 3B is a partial cross-sectional view of the main part showing another joined state of the outer cylinder.

図１，図２に示すように、タービンハウジング１０は、車両のターボチャージャ（ターボ過給機）のハウジングとして用いられ、タービンホイール１３ａが入って吸入空気（吸気）Ａの入口を構成する吸気側のフランジ１１と、排気ガスの入口を構成する排気入口側のフランジ１５、及び、排気ガスの出口を構成する排気出口側（排気流れ下流側）のフランジ１６に溶接によりそれぞれ固定される内筒２０及び外筒３０からなる所謂二重殻構造となっている。   As shown in FIGS. 1 and 2, the turbine housing 10 is used as a housing of a turbocharger (turbocharger) of a vehicle, and includes an intake side (intake air) A including a turbine wheel 13 a. The inner cylinder 20 is fixed by welding to the flange 11 of the exhaust gas, the flange 15 on the exhaust inlet side constituting the inlet of the exhaust gas, and the flange 16 on the exhaust outlet side (downstream side of the exhaust flow) constituting the outlet of the exhaust gas. And a so-called double shell structure comprising the outer cylinder 30.

図１に示すように、吸気側のフランジ１１には外部から吸入空気Ａを取り入れるコンプレッサ１４が接続され、また、排気ガスＢを放出する排気出口側のフランジ１６には排気ガスＢの有害な汚染物質を取り除く図示しない触媒コンバータが接続される。すなわち、タービンハウジング１０は、吸気側のコンプレッサ１４と触媒コンバータの間に介在される。   As shown in FIG. 1, a compressor 14 that takes in intake air A from the outside is connected to the flange 11 on the intake side, and harmful contamination of the exhaust gas B on the flange 16 on the exhaust outlet side that discharges the exhaust gas B is performed. A catalytic converter (not shown) that removes the substance is connected. That is, the turbine housing 10 is interposed between the intake side compressor 14 and the catalytic converter.

図２に示すように、内筒２０がハウジング内部の排気ガスの排気流路Ｋを実質的に区画形成し、外筒３０は内筒２０を隙間Ｇ（所定間隔）を空けて完全に覆い、内筒２０を保護すると同時に断熱し、かつ、タービンハウジング１０としての剛性を高める役割を担う外殻構造体をなしている。   As shown in FIG. 2, the inner cylinder 20 substantially forms an exhaust flow path K for exhaust gas inside the housing, and the outer cylinder 30 completely covers the inner cylinder 20 with a gap G (predetermined interval), The outer shell structure which plays the role which protects the inner cylinder 20 at the same time, heats it, and raises the rigidity as the turbine housing 10 is comprised.

内筒２０は、プレス成形された２つの板金製の分割体２１，２２を溶接により接合することにより、内部にＬ字状の排気流路Ｋが形成される。   The inner cylinder 20 is formed with an L-shaped exhaust passage K inside by joining two sheet metal-made divided bodies 21 and 22 by welding.

また、外筒３０は、タービンホイール１３ａのタービン軸１３ｂの軸方向Ｌ（車両走行時の振動方向）に沿う面で２分割形成された第１外筒分割体３１と第２外筒分割体３２との２つの板金製の薄板部材によって構成されている。すなわち、第１外筒分割体３１と第２外筒分割体３２は、板金をプレス加工することにより所定の湾曲形状に成形されていて、このプレス成形された２つの板金製の第１外筒分割体３１と第２外筒分割体３２を溶接により接合することにより、内筒２０を隙間Ｇを空けて完全に覆うようになっている。そして、図３（ａ）に示すように、第１外筒分割体３１の段差状に延びた段差部である他端部３１ｂと第２外筒分割体３２の段差状に延びた段差部である一端部３２ａとは、第１外筒分割体３１の他端部３１ｂを下にして重ね合わせてタービンホイール１３ａのタービン軸１３ｂの軸方向（軸直線方向）Ｌに沿って溶接により互いに固定されている。この溶接部分を符号Ｅで示す。車両が走行中において、タービン軸１３ｂの軸方向Ｌで伸縮するため、軸方向Ｌに沿って溶接することによって、溶接目の破裂を防止することができるようになっている。   The outer cylinder 30 is divided into a first outer cylinder divided body 31 and a second outer cylinder divided body 32 that are formed in two on the surface along the axial direction L of the turbine shaft 13b of the turbine wheel 13a (vibration direction during vehicle travel). And two sheet metal thin plate members. That is, the first outer cylinder divided body 31 and the second outer cylinder divided body 32 are formed into a predetermined curved shape by pressing a sheet metal, and the first outer cylinder made of the two sheet metals formed by press forming is used. The inner cylinder 20 is completely covered with a gap G by joining the divided body 31 and the second outer cylinder divided body 32 by welding. Then, as shown in FIG. 3A, the other end portion 31b which is a step portion extending in a step shape of the first outer cylinder divided body 31 and a step portion extending in a step shape of the second outer cylinder divided body 32 are used. The one end 32a is fixed to each other by welding along the axial direction (axial linear direction) L of the turbine shaft 13b of the turbine wheel 13a with the other end 31b of the first outer cylinder divided body 31 facing down. ing. This welded portion is indicated by E. Since the vehicle expands and contracts in the axial direction L of the turbine shaft 13b while the vehicle is running, welding along the axial direction L can prevent the rupture of the weld.

尚、図３（ｂ）に示すように、第１外筒分割体３１の段差状の他端部３１ｂを第２外筒分割体３２の段差状の一端部３２ａの上に重ね合わせてタービンホイール１３ａのタービン軸１３ｂの軸方向Ｌに沿って溶接により互いに固定しても良い。また、図１に示すように、第１外筒分割体３１の一端部３１ａ側及び第２外筒分割体３２の他端部（図示省略）側は、排気入口側のフランジ１５の開口部に沿った半円弧湾曲状にそれぞれ形成されて、開口部のまわりの排気入口側のフランジ１５に溶接により互いに固定されている。   In addition, as shown in FIG. 3B, the stepped other end portion 31b of the first outer cylinder divided body 31 is overlaid on the stepped one end portion 32a of the second outer cylinder divided body 32 to thereby form a turbine wheel. You may fix to each other by welding along the axial direction L of the turbine shaft 13b of 13a. Moreover, as shown in FIG. 1, the one end part 31a side of the 1st outer cylinder division body 31 and the other end part (illustration omitted) side of the 2nd outer cylinder division body 32 are in the opening part of the flange 15 by the side of an exhaust inlet. Each of them is formed in a semicircular arc shape along the same, and is fixed to the flange 15 on the exhaust inlet side around the opening by welding.

図２に示すように、吸気側のフランジ１１は、円形の開口部１１ａを有した円環状に形成されており、その外周側にタービンホイール１３ａのタービン軸１３ｂより外側に延びる円環板状の突起１２が形成されている。この円環板状の突起１２は、第１内筒分割体２１と第２内筒分割体２２とでスクロール室Ｆを形成したスクロール状の内筒２０の円周より大きい円周を成している。そして、吸気側のフランジ１１の開口部１１ａの周りの内端側の段部１１ｂには、第１内筒分割体２１の一端部２１ａが溶接により固定されている。これにより、図２に示すように、第１内筒分割体２１と突起１２の間には、隙間Ｓが形成される。   As shown in FIG. 2, the flange 11 on the intake side is formed in an annular shape having a circular opening 11a, and has an annular plate shape extending outward from the turbine shaft 13b of the turbine wheel 13a on the outer peripheral side thereof. A protrusion 12 is formed. The annular plate-like protrusion 12 has a circumference larger than the circumference of the scroll-like inner cylinder 20 in which the scroll chamber F is formed by the first inner cylinder divided body 21 and the second inner cylinder divided body 22. Yes. And the one end part 21a of the 1st inner cylinder division body 21 is being fixed to the step part 11b of the inner end side around the opening part 11a of the flange 11 by the side of an intake side by welding. Thereby, as shown in FIG. 2, a gap S is formed between the first inner cylinder divided body 21 and the protrusion 12.

また、図２に示すように、突起１２の外端側には、第１外筒分割体３１の一方の側端部３１ｃを位置決めする位置決め用の凸部１２ａが形成されている。この位置決め用の凸部１２ａと突起１２との間に補強用のリブ１２ｂが一体突出形成されている。そして、突起１２の位置決め用の凸部１２ａには、第１外筒分割体３１の一方の側端部３１ｃが溶接により固定されている。この溶接部分を符号Ｅで示す。また、突起１２の上端面（外端）１２ｃには、第２外筒分割体３２の一方の側端部３２ｃが溶接により固定されている。これにより、外筒３０と突起１２の溶接部分Ｅがスクロール状の内筒２０よりも外側に位置するようになっている。   As shown in FIG. 2, a positioning convex portion 12 a that positions one side end portion 31 c of the first outer cylinder divided body 31 is formed on the outer end side of the protrusion 12. A reinforcing rib 12b is integrally formed between the positioning convex portion 12a and the projection 12. And the one side edge part 31c of the 1st outer cylinder division body 31 is being fixed to the convex part 12a for positioning of the protrusion 12 by welding. This welded portion is indicated by E. In addition, one side end portion 32c of the second outer cylinder divided body 32 is fixed to the upper end surface (outer end) 12c of the protrusion 12 by welding. Thereby, the welding part E of the outer cylinder 30 and the protrusion 12 is located outside the scroll-shaped inner cylinder 20.

以上実施形態のタービンハウジング１０によれば、車両走行時の振動方向であるタービンホイール１３ａのタービン軸１３ｂの軸方向Ｌに沿って２分割されて外筒３０を構成する第１外筒分割体３１と第２外筒分割体３２の隣接する端部３１ｂ，３２ａ同士を、タービンホイール１３ａのタービン軸１３ｂの軸方向Ｌに沿って溶接により固定することによって、車両走行時の振動による応力を緩和することができ、第１外筒分割体３１と第２外筒分割体３２の隣接する端部３１ｂ，３２ａの溶接部分Ｅの割れを確実に防止することができる。これにより、経時的に溶接部分Ｅの状態がより安定した板金製のタービンハウジング１０を低コストで提供することができる。   According to the turbine housing 10 of the above-described embodiment, the first outer cylinder divided body 31 that is divided into two along the axial direction L of the turbine shaft 13b of the turbine wheel 13a, which is the vibration direction during vehicle travel, and constitutes the outer cylinder 30. And the adjacent end portions 31b, 32a of the second outer cylinder divided body 32 are fixed by welding along the axial direction L of the turbine shaft 13b of the turbine wheel 13a, thereby relieving stress caused by vibration during vehicle travel. It is possible to reliably prevent the welded portion E of the adjacent end portions 31b and 32a of the first outer cylinder divided body 31 and the second outer cylinder divided body 32 from being cracked. Thereby, the turbine housing 10 made of sheet metal in which the state of the welded portion E is more stable over time can be provided at a low cost.

また、図３（ａ），（ｂ）に示すように、第１外筒分割体３１の段差部である他端部３１ｂを、隣接する第２外筒分割体３２の段差部である一端部３２ａの下側に重ねたり、上側に重ねて溶接により固定したことにより、２つの第１，第２外筒分割体３１，３２の隣接する端部３１ｂ，３２ａ同士を簡単かつ確実に溶接して固定することができる。   Further, as shown in FIGS. 3A and 3B, the other end portion 31 b that is the step portion of the first outer cylinder divided body 31 is replaced with one end portion that is the step portion of the adjacent second outer cylinder divided body 32. By overlapping the lower side of 32a or by fixing the upper side by welding, adjacent end portions 31b, 32a of the two first and second outer cylinder divided bodies 31, 32 are welded easily and reliably. Can be fixed.

尚、前記実施形態によれば、図３（ａ），（ｂ）に示すように、第１，第２外筒分割体３１，３２の隣接する端部３１ｂ，３２ａを段差状に水平に延びるように形成したが、第１，第２外筒分割体３１，３２の隣接する端部３１ｂ，３２ａを、図４〜図７に示す種々の形状にしても良い。   In addition, according to the said embodiment, as shown to Fig.3 (a), (b), the edge parts 31b and 32a which adjoin the 1st, 2nd outer cylinder division bodies 31 and 32 are extended horizontally in a step shape. However, the adjacent end portions 31b and 32a of the first and second outer cylinder divided bodies 31 and 32 may have various shapes as shown in FIGS.

すなわち、図４（ｃ），（ｄ）に示すように、第１，第２外筒分割体３１，３２の隣接する端部３１ｂ，３２ａのうち一方を段差状に形成したり、図４（ａ），（ｂ），（ｅ）に示すように、両方を段差状にすることなく、重ねたり、突き合わせて接合しても良い。   That is, as shown in FIGS. 4C and 4D, one of the adjacent end portions 31b and 32a of the first and second outer cylinder divided bodies 31 and 32 is formed in a step shape, or FIG. As shown in a), (b), and (e), they may be overlapped or butted together without forming a step.

また、図５（ａ）〜図５（ｇ）に示すように、第１，第２外筒分割体３１，３２の隣接する端部のうち少なくとも一方を外側に垂直に折り曲げた折曲部３１ｂ′，３２ａ′にしたり、さらに、図６（ａ）〜図６（ｇ）に示すように、その先端を更に水平、垂直に折り曲げても良い。   Further, as shown in FIGS. 5A to 5G, a bent portion 31b in which at least one of the adjacent end portions of the first and second outer cylinder divided bodies 31 and 32 is vertically bent outward. ', 32a', and further, as shown in FIGS. 6 (a) to 6 (g), the tip may be bent further horizontally and vertically.

さらに、図７（ａ）〜図７（ｅ）に示すように、第１，第２外筒分割体３１，３２の隣接する端部のうち少なくとも一方を内側に垂直に折り曲げた折曲部３１ｂ″，３２ａ″にしても良い。   Further, as shown in FIGS. 7A to 7E, a bent portion 31b in which at least one of the adjacent end portions of the first and second outer cylinder divided bodies 31 and 32 is vertically bent inward. ", 32a" may be used.

これらにより、前記実施形態と同様に、２つの第１，第２外筒分割体３１，３２の隣接する端部３１ｂ，３２ａ、３１ｂ′，３２ａ′、３１ｂ″，３２ａ″同士を簡単かつ確実に溶接して固定することができる。   By these, similarly to the above-described embodiment, the adjacent end portions 31b, 32a, 31b ′, 32a ′, 31b ″, 32a ″ of the two first and second outer cylinder divided bodies 31, 32 can be easily and reliably connected to each other. Can be fixed by welding.

１０ タービンハウジング
１３ａ タービンホイール
１３ｂ タービン軸
１４ コンプレッサ
１９ 触媒コンバータ
２０ 内筒
３０ 外筒
３１ 第１外筒分割体（薄板部材）
３１ｂ 段差部（一方の端部）
３１ｂ′，３１ｂ″ 折曲部（一方の端部）
３２ 第２外筒分割体（薄板部材）
３２ａ，３２ａ′，３２ａ″ 他方の端部
Ｋ 排気流路
Ｇ 隙間（所定間隔）
Ｌ 軸方向 DESCRIPTION OF SYMBOLS 10 Turbine housing 13a Turbine wheel 13b Turbine shaft 14 Compressor 19 Catalytic converter 20 Inner cylinder 30 Outer cylinder 31 1st outer cylinder division body (thin plate member)
31b Step part (one end part)
31b ', 31b "bent portion (one end)
32 Second outer cylinder divided body (thin plate member)
32a, 32a ′, 32a ″ The other end K Exhaust flow path G Gap (predetermined interval)
L axis direction

Claims (3)

ターボチャージャにおけるタービンハウジング（１０）であって、
タービンホイール（１３ａ）が配置される排気流路（Ｋ）を形成する内筒（２０）と、
前記内筒（２０）とともに前記タービンホイール（１３ａ）を収容するフランジ（１１）と、
前記内筒（２０）への排気入口を構成する排気入口側フランジ（１５）と、
前記内筒（２０）に対し排気出口側に位置する排気出口側フランジ（１６）と、
前記フランジ、前記排気入口側フランジ及び前記排気出口側フランジに固定された状態で、該内筒（２０）を完全に覆う薄板部材の外筒（３０）と、を備え、
前記外筒（３０）は、
前記フランジ（１１）、前記排気入口側フランジ（１５）及び前記排気出口側フランジ（１６）のそれぞれに溶接された第１外筒分割体（３１）と、
前記フランジ（１１）、前記排気入口側フランジ（１５）及び前記排気出口側フランジ（１６）のそれぞれに溶接された第２外筒分割体（３２）と、を有し、
前記第１外筒分割体（３１）及び前記第２外筒分割体（３２）は、前記タービンホイール（１３ａ）のタービン軸（１３ｂ）の軸方向（Ｌ）に沿って互いに溶接により固定されていることを特徴とするタービンハウジング。 A turbine housing (10) in a turbocharger comprising:
An inner cylinder (20) forming an exhaust passage (K) in which the turbine wheel (13a) is disposed;
A flange (11) for accommodating the turbine wheel (13a) together with the inner cylinder (20);
An exhaust inlet side flange (15) constituting an exhaust inlet to the inner cylinder (20);
An exhaust outlet side flange (16) located on the exhaust outlet side with respect to the inner cylinder (20) ;
An outer cylinder (30) of a thin plate member that completely covers the inner cylinder (20) while being fixed to the flange, the exhaust inlet side flange and the exhaust outlet side flange ,
The outer cylinder (30)
A first outer cylinder divided body (31) welded to each of the flange (11), the exhaust inlet side flange (15) and the exhaust outlet side flange (16);
A second outer cylinder divided body (32) welded to each of the flange (11), the exhaust inlet side flange (15) and the exhaust outlet side flange (16),
The first outer cylinder divided body (31) and the second outer cylinder divided body (32) are fixed to each other along the axial direction (L) of the turbine shaft (13b) of the turbine wheel (13a) by welding. A turbine housing. 請求項１記載のタービンハウジング（１０）であって、
前記第１外筒分割体（３１）と前記第２外筒分割体（３２）の少なくとも一方の端部には、段差部（３１ｂ）が形成され、
前記段差部（３１ｂ）には、他方の端部（３２ａ）が溶接により固定されていることを特徴とするタービンハウジング。 A turbine housing (10) according to claim 1, comprising:
A step portion (31b) is formed on at least one end of the first outer cylinder divided body (31) and the second outer cylinder divided body (32) ,
The turbine housing, wherein the other end (32a) is fixed to the step (31b) by welding. 請求項１記載のタービンハウジング（１０）であって、
前記第１外筒分割体（３１）と前記第２外筒分割体（３２）の少なくとも一方の端部には、外側または内側に折り曲げられた折曲部（３１ｂ′，３１ｂ″）が形成され、
前記折曲部には、他方の端部（３２ａ′，３２ａ″）が溶接により固定されていることを特徴とするタービンハウジング。
A turbine housing (10) according to claim 1, comprising:
At least one end of the first outer cylinder divided body (31) and the second outer cylinder divided body (32 ) is formed with bent portions (31b ′, 31b ″) bent outward or inward. ,
The other end (32a ′, 32a ″) is fixed to the bent portion by welding.
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