JP2009264120A - Turbine housing - Google Patents

Turbine housing Download PDF

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JP2009264120A
JP2009264120A JP2008111016A JP2008111016A JP2009264120A JP 2009264120 A JP2009264120 A JP 2009264120A JP 2008111016 A JP2008111016 A JP 2008111016A JP 2008111016 A JP2008111016 A JP 2008111016A JP 2009264120 A JP2009264120 A JP 2009264120A
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turbine housing
exhaust gas
gas
main body
scroll
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JP5225736B2 (en
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Takuya Kajita
卓弥 梶田
Akira Sato
佐藤　　明
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Aisin Takaoka Co Ltd
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Aisin Takaoka Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a turbine housing reducing the number of part items, reducing welding man-hours, and improving endurance reliability, in comparison with the past. <P>SOLUTION: This turbine housing includes a scroll body portion 11 partitioning a substantially annular gas channel, and a gas introduction portion 12 for introducing exhaust gas taken in from a gas inlet 13a to the winding start position of a scroll body portion 11. The gas introduction part 12 is formed by joining together halved first and second parts 31, 32. The second halved part 32 is integrally formed with a straightening portion 33. The straightening portion 33 straightens an exhaust gas flow at a confluence of exhaust gas introduced from the gas inlet 13a to the winding start position of the scroll body portion 11 and exhaust gas recirculating by taking a round around the scroll body portion 11. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、ターボチャージャーの主要な構成部品の１つである排気タービンホイール用のハウジング（通称、タービンハウジング）に関するものである。   The present invention relates to a housing (commonly referred to as a turbine housing) for an exhaust turbine wheel, which is one of the main components of a turbocharger.

一般に、タービンハウジングは鋳物製であるが、鋳物製ハウジングは重くて熱容量が大きいという欠点がある。それゆえ近年、タービンハウジングの薄肉化（ひいては軽量化及び低熱容量化）を図るため、スクロール部の全部又は一部を金属板材の板金加工やハイドロフォーミングによって形成してなる非鋳物製のタービンハウジングが提案されている（例えば特許文献１参照）。図１及び図２は、そのような非鋳物製タービンハウジングの一従来例を示す。   Generally, the turbine housing is made of a casting, but the casting housing has a drawback that it is heavy and has a large heat capacity. Therefore, in recent years, in order to reduce the thickness of the turbine housing (and thus reduce the weight and heat capacity), there is a non-casting turbine housing in which all or part of the scroll portion is formed by sheet metal processing or hydroforming of a metal plate material. It has been proposed (see, for example, Patent Document 1). 1 and 2 show one conventional example of such a non-cast turbine housing.

図１及び図２のタービンハウジングは、スクロール本体部１１及びガス導入部１２からなるスクロール部１０を備え、このスクロール部１０に対し、入口フランジ１３、出口フランジ１４及びセンターハウジング側フランジ（図示略）を固着して構成されている。スクロール本体部１１は、その内部に、巻き始め位置と巻き終り位置とがつながった略環状のガス流路を区画するものである。ガス導入部１２は、入口フランジ１３に対応するガス入口１３ａから取り込んだ排気ガスを前記スクロール本体部１１の巻き始め位置に導くための導管である。   The turbine housing shown in FIGS. 1 and 2 includes a scroll portion 10 including a scroll main body portion 11 and a gas introduction portion 12, and an inlet flange 13, an outlet flange 14, and a center housing side flange (not shown) with respect to the scroll portion 10. It is constituted by fixing. The scroll main body 11 defines a substantially annular gas flow path in which a winding start position and a winding end position are connected. The gas introduction part 12 is a conduit for guiding the exhaust gas taken in from the gas inlet 13 a corresponding to the inlet flange 13 to the winding start position of the scroll main body part 11.

特に図２に示すように、ガス導入部１２は、第１の半割りパーツ２１と第２の半割りパーツ２２とを接合すると共に、両半割りパーツ接合時における左右両側の重ね合わせ接合部２３（図２（ａ）参照）に対し溶接を施すことにより一体化されている。更に、このガス導入部１２の内壁部には、前記第１及び第２の半割りパーツ２１，２２とは別体の整流板２４が装着されている。この整流板２４は、ガス入口１３ａから導入された排気ガスと、スクロール本体部１１を一巡し還流してきた排気ガスとの合流点におけるガス流れを整えて、新規導入の排気ガスと還流排気ガスとの干渉による排気抵抗の増大を回避するために設けられている。   In particular, as shown in FIG. 2, the gas introduction part 12 joins the first half part 21 and the second half part 22, and the overlapping joint parts 23 on both the left and right sides when joining both half parts. (See FIG. 2 (a)). Further, a current plate 24 separate from the first and second half parts 21 and 22 is attached to the inner wall portion of the gas introduction portion 12. This rectifying plate 24 arranges the gas flow at the junction of the exhaust gas introduced from the gas inlet 13a and the exhaust gas that has recirculated through the scroll main body 11, and newly introduced exhaust gas and recirculated exhaust gas. It is provided to avoid an increase in exhaust resistance due to interference.

なお、かかる整流板２４は、タービンハウジングの非鋳物化に伴って特に必要となった部材であり、鋳物製タービンハウジングにおいてスクロール部内壁の延長に位置するように一体鋳造されていたタング部に相当するものである。特許文献１の図３に示されたガイド部材（９）は、上記非鋳物製タービンハウジングにおける整流板２４に対応する。
特開２００７−２２４８２７号（図３等参照） The rectifying plate 24 is a member that is particularly necessary with the non-casting of the turbine housing, and corresponds to a tongue portion that is integrally cast so as to be located at the extension of the inner wall of the scroll portion in the cast turbine housing. To do. The guide member (9) shown in FIG. 3 of Patent Document 1 corresponds to the rectifying plate 24 in the non-cast turbine housing.
JP 2007-224827 (see FIG. 3 etc.)

しかしながら、図１及び図２に示すタービンハウジングのように、整流板２４を別体のものとすると、部品点数の増加及び溶接工数の増加によるコスト増を招いてしまうおそれがあった。また、第１及び第２の半割りパーツ２１，２２の溶接位置（溶接ビードの位置）と、整流板２４をガス導入部１２内に溶接したときの溶接位置（溶接ビードの位置）とが接近している場合には、不要な入熱によって溶接強度が低下するおそれがあることから、タービンハウジングの耐久信頼性を更に向上させることが望まれている。   However, if the rectifying plate 24 is separate, as in the turbine housing shown in FIGS. 1 and 2, there is a risk that the cost increases due to an increase in the number of parts and an increase in the number of welding processes. Moreover, the welding position (position of the weld bead) of the first and second halved parts 21 and 22 and the welding position (position of the weld bead) when the rectifying plate 24 is welded into the gas introduction part 12 are close to each other. In such a case, since the welding strength may be reduced by unnecessary heat input, it is desired to further improve the durability reliability of the turbine housing.

本発明の目的は、従来よりも部品点数の削減、溶接工数の削減および耐久信頼性の向上を図ることができるタービンハウジングを提供することにある。また、スクロール部に新規導入される排気ガスと還流排気ガスとの排気干渉を生じにくいタービンハウジングを提供することにある。   An object of the present invention is to provide a turbine housing capable of reducing the number of parts, reducing the number of welding steps, and improving the durability reliability as compared with the prior art. Another object of the present invention is to provide a turbine housing that hardly causes exhaust interference between exhaust gas newly introduced into a scroll portion and recirculated exhaust gas.

請求項１の発明は、巻き始め位置と巻き終り位置とがつながった略環状のガス流路を区画するスクロール本体部、及び、ガス入口から取り込んだ排気ガスを前記スクロール本体部の巻き始め位置に導くためのガス導入部を備えたタービンハウジングであって、少なくとも前記ガス導入部は、相互に接合可能な第１分割パーツ及び第２分割パーツを含む複数のパーツを接合することにより形成され、前記第１及び第２分割パーツの一方には、前記ガス入口から前記スクロール本体部の巻き始め位置に導入される排気ガスと、前記スクロール本体部を一巡して前記巻き終り位置から前記巻き始め位置に向かう還流排気ガスとの合流点において排気ガス流れを整流化するための整流部が一体形成されていることを特徴とする。   According to the first aspect of the present invention, the scroll main body section that defines the substantially annular gas flow path in which the winding start position and the winding end position are connected, and the exhaust gas taken in from the gas inlet is provided at the winding start position of the scroll main body section. A turbine housing having a gas introduction part for guiding, wherein at least the gas introduction part is formed by joining a plurality of parts including a first divided part and a second divided part that can be joined to each other, One of the first and second divided parts includes an exhaust gas introduced from the gas inlet to the winding start position of the scroll main body, and makes a round of the scroll main body from the winding end position to the winding start position. A rectifying unit for rectifying the exhaust gas flow is integrally formed at a junction with the recirculating exhaust gas that is directed.

この構成によれば、ガス導入部を形成する第１及び第２分割パーツの一方には、ガス入口から新規導入される排気ガスと還流排気ガスとの合流点において排気ガス流れを整流化するための整流部が一体形成されている。このため、整流板が別体化されていた従来例に比べて、部品点数の削減および溶接工数の削減を図ることができると共に、溶接ビードの接近による耐久性の低下を回避して耐久信頼性の向上を図ることができる。   According to this configuration, in one of the first and second divided parts forming the gas introduction portion, the exhaust gas flow is rectified at the junction of the exhaust gas newly introduced from the gas inlet and the recirculated exhaust gas. Are integrally formed. For this reason, compared with the conventional example in which the current plate is separated, it is possible to reduce the number of parts and the number of welding processes, and avoid the deterioration of the durability due to the approach of the weld bead. Can be improved.

請求項２の発明は、請求項１に記載のタービンハウジングにおいて、前記第１及び第２分割パーツは、それぞれ金属板材の板金加工によって形成されると共に、これら分割パーツの相互接合部に溶接を施すことにより一体化されて前記ガス導入部の本体部分を形成することを特徴とする。   According to a second aspect of the present invention, in the turbine housing according to the first aspect, each of the first and second divided parts is formed by sheet metal processing of a metal plate material, and welding is performed on the mutual joint portion of the divided parts. In this way, the main body part of the gas introduction part is formed by being integrated.

このように、ガス導入部の本体部分が、板金加工製の二つの分割パーツの相互接合部に溶接を施して一体化されたものである場合（つまり非鋳物製品である場合）に、本発明の有用性や必要性が特に認められる。   As described above, when the main body portion of the gas introduction portion is integrated by welding the joint portions of the two divided parts made of sheet metal processing (that is, when it is a non-cast product), the present invention The usefulness and necessity of is particularly recognized.

請求項３の発明は、請求項１又は２に記載のタービンハウジングにおいて、当該タービンハウジングに前記整流部が存在しない場合における前記スクロール本体部の巻き終り位置での流路断面積をＡｅとした場合、前記整流部によって前記Ａｅの２８〜３８％が閉ざされ、その結果、前記スクロール本体部の巻き終り位置での流路断面積が前記Ａｅの６２〜７２％となるように前記整流部が設けられていることを特徴とする。   The invention according to claim 3 is the turbine housing according to claim 1 or 2, wherein the flow passage cross-sectional area at the winding end position of the scroll main body portion when the rectifying portion does not exist in the turbine housing is Ae. The rectifying section is provided so that 28 to 38% of the Ae is closed by the rectifying section, and as a result, the flow passage cross-sectional area at the winding end position of the scroll main body section is 62 to 72% of the Ae. It is characterized by being.

このように、スクロール本体部の巻き終り位置での流路断面積が、Ａｅ（タービンハウジングに整流部が存在しない場合におけるスクロール本体部の巻き終り位置での流路断面積）の６２〜７２％となるように整流部を設けることで、整流板の形状如何にかかわらず、新規導入の排気ガスと還流排気ガスとの合流点での排気干渉を緩和して、排気干渉に起因する過給性能の低下を防止することができる。ちなみに、スクロール本体部の巻き終り位置での流路断面積がＡｅの６２％未満であると、還流排気ガスの流通抵抗が過大になり、過給性能が低下するおそれがある。他方、巻き終り位置での流路断面積がＡｅの７２％を超えると、整流部が全く存在しないケースに近くなり、新規導入ガスと還流ガスとの排気干渉が顕著化して過給性能が低下するおそれがある。   Thus, the flow passage cross-sectional area at the winding end position of the scroll main body portion is 62 to 72% of Ae (the flow passage cross-sectional area at the winding end position of the scroll main body portion when the rectifying portion is not present in the turbine housing). By providing a rectifying unit to reduce the exhaust interference at the junction of the newly introduced exhaust gas and the recirculated exhaust gas regardless of the shape of the rectifying plate, the supercharging performance due to the exhaust interference Can be prevented. Incidentally, if the flow passage cross-sectional area at the winding end position of the scroll body is less than 62% of Ae, the flow resistance of the recirculated exhaust gas becomes excessive, and the supercharging performance may be lowered. On the other hand, when the cross-sectional area of the flow path at the end of winding exceeds 72% of Ae, it becomes close to the case where there is no rectification part, and the exhaust interference between the newly introduced gas and the reflux gas becomes noticeable and the supercharging performance decreases. There is a risk.

本発明のタービンハウジングによれば、従来よりも部品点数の削減、溶接工数の削減および耐久信頼性の向上を図ることができる。また、スクロール部に新規導入される排気ガスと還流排気ガスとの排気干渉を生じにくくすることができる。   According to the turbine housing of the present invention, the number of parts, the number of welding steps, and the durability reliability can be improved as compared with the conventional case. Further, it is possible to make it difficult for exhaust interference between the exhaust gas newly introduced into the scroll portion and the recirculated exhaust gas to occur.

以下、本発明の一実施形態を図３〜図５を参照しつつ説明する。
図３及び図４に示すように、タービンハウジングはスクロール部１０を備え、このスクロール部１０に対し入口フランジ１３、出口フランジ１４及びセンターハウジング側フランジ（図示略）を固着して構成されている。スクロール部１０は、スクロール本体部１１と、それに連なるガス導入部１２（「助走部」ともいう）とから構成されている。 Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
As shown in FIGS. 3 and 4, the turbine housing includes a scroll portion 10, and an inlet flange 13, an outlet flange 14, and a center housing side flange (not shown) are fixed to the scroll portion 10. The scroll unit 10 includes a scroll main body unit 11 and a gas introduction unit 12 (also referred to as a “running unit”) connected thereto.

スクロール本体部１１の内部には、巻き始め位置と巻き終り位置とがつながった略環状トンネル状のガス流路１１ａが区画されている。このようなスクロール本体部１１は、例えばステンレス鋼板等の金属板材をプレス成形して得た半割り部品（二つ）を重ね合わせ接合又は突き合せ接合して溶接することにより得られる板金加工品、又は、中空な金属素材をハイドロフォーミングすることにより得られる液圧成形品として提供される。   Inside the scroll body 11, a substantially annular tunnel-shaped gas flow path 11a in which a winding start position and a winding end position are connected is defined. Such a scroll main body 11 is a sheet metal processed product obtained by welding a half-part (two) obtained by press-molding a metal plate material such as a stainless steel plate, for example, by overlapping joining or butt joining, Alternatively, it is provided as a hydroformed product obtained by hydroforming a hollow metal material.

スクロール本体部１１の中央部正面側には、略リング形状の出口フランジ１４が設けられている。出口フランジ１４は、当該タービンハウジングにそれよりも下流側の外部配管（例えばエルボ、図示略）を接続する際の継手部であり、スクロール本体部１１内を循環した排気ガスが当該タービンハウジングの外へ逃れ出るためのガス出口１４ａを提供するものである。他方、スクロール本体部１１の中央部背面側（図示略）には、センターハウジング側フランジ（図示略）が設けられている。センターハウジング側フランジは、当該タービンハウジングをターボチャージャーのセンターハウジング（ベアリングハウジングともいう）に接続固定する際の継手部となるものである。   A substantially ring-shaped outlet flange 14 is provided on the front side of the center of the scroll body 11. The outlet flange 14 is a joint portion for connecting an external pipe (for example, elbow, not shown) downstream of the turbine housing to the turbine housing, and the exhaust gas circulated in the scroll main body 11 is outside the turbine housing. A gas outlet 14a is provided for escaping. On the other hand, a center housing side flange (not shown) is provided on the back side (not shown) of the central part of the scroll body 11. The center housing side flange serves as a joint portion when the turbine housing is connected and fixed to the center housing (also referred to as a bearing housing) of the turbocharger.

スクロール部１０の一側部を占めるガス導入部１２の先端部には、入口フランジ１３が設けられている。入口フランジ１３は、当該タービンハウジングにそれよりも上流側の外部配管（図示略）を接続する際の継手部であり、当該タービンハウジングに導入されるべき排気ガスの入口（ガス入口１３ａ）を提供するものである。ガス導入部１２は、ガス入口１３ａから取り込んだ排気ガスをスクロール本体部１１の巻き始め位置に導く導管の役目を果たす。   An inlet flange 13 is provided at the distal end of the gas introduction part 12 occupying one side of the scroll part 10. The inlet flange 13 is a joint portion when an external pipe (not shown) on the upstream side of the turbine housing is connected to the turbine housing, and provides an inlet (gas inlet 13a) for exhaust gas to be introduced into the turbine housing. To do. The gas introduction part 12 serves as a conduit that guides the exhaust gas taken in from the gas inlet 13 a to the winding start position of the scroll body 11.

図４（ａ）に示すように、ガス導入部１２は、横断面略円形の円筒形状をなしており、その略円形の横断面をほぼ水平に横切る直径線（図中に二点鎖線で示す接合境界１５）に沿って上下に二分割したような二つの半割りパーツ（即ち第１の分割パーツ３１及び第２の分割パーツ３２）から形成されている。第１及び第２の分割パーツ３１，３２は、金属板材（例えばステンレス鋼板）の板金加工（例えばプレス加工）によってそれぞれ別パーツとして形成されている。本実施形態では、図４（ａ）においてガス導入部１２の下側半分を構成する第２の分割パーツ３２には、湾曲板形状の整流部３３が分割パーツ本体部分と一体形成されている。この整流部３３は、ガス入口１３ａから導入された排気ガスと、スクロール本体部１１を一巡し還流してきた排気ガスとの合流点におけるガス流れを整えて、新規導入の排気ガスと還流排気ガスとの干渉による排気抵抗の増大を回避する。   As shown in FIG. 4A, the gas introduction part 12 has a cylindrical shape with a substantially circular cross section, and a diameter line (indicated by a two-dot chain line in the drawing) that substantially horizontally crosses the substantially circular cross section. It is formed of two halved parts (that is, a first divided part 31 and a second divided part 32) which are divided into two vertically along the joining boundary 15). The first and second divided parts 31 and 32 are formed as separate parts by sheet metal processing (for example, press processing) of a metal plate material (for example, stainless steel plate). In the present embodiment, a curved plate-shaped rectifying part 33 is integrally formed with the divided part main body part in the second divided part 32 constituting the lower half of the gas introducing part 12 in FIG. This rectification unit 33 arranges the gas flow at the junction of the exhaust gas introduced from the gas inlet 13a and the exhaust gas that has recirculated through the scroll body 11, and newly introduced exhaust gas and recirculated exhaust gas The increase in exhaust resistance due to the interference is avoided.

本実施形態では、第１の分割パーツ３１と第２の分割パーツ３２とを互いに接合させると共に、その相互接合部分に溶接を施すことにより、両分割パーツ３１，３２は一体化されている。即ち図４（ａ）では、ガス導入部１２の右端位置において両分割パーツ３１，３２が突き合せ接合され、この突き合せ接合部に対し溶接Ｗ１が施されている。また、ガス導入部１２の左端位置において両分割パーツ３１，３２が重ね合わせ接合され、この重ね合わせ接合部に対し溶接Ｗ２が施されている。   In the present embodiment, the first divided part 31 and the second divided part 32 are joined to each other, and the divided parts 31 and 32 are integrated by welding the joint part. That is, in FIG. 4A, both divided parts 31 and 32 are butt-joined at the right end position of the gas introduction part 12, and welding W1 is applied to the butt-joint part. Further, the split parts 31 and 32 are overlapped and joined at the left end position of the gas introducing portion 12, and welding W2 is applied to the overlapped joint portion.

なお、本実施形態では、第２分割パーツ３２に一体形成された整流部３３が、両分割パーツの接合境界１５を超えて第１分割パーツ３１の内側に入り込んでいる（図４（ａ）参照）。この第１分割パーツ３１の内側に入り込んだ整流部３３の先端部又はその近傍に溶接Ｗ３を施して、整流部３３の先端部またはその近傍を第１分割パーツ３１の内壁面に溶接固定することは好ましい。溶接Ｗ３を施すことで、スクロール部内部での整流部３３の支持が確実になり、タービンハウジングの耐久信頼性が更に向上する。   In the present embodiment, the rectifying unit 33 formed integrally with the second divided part 32 enters the inside of the first divided part 31 beyond the joint boundary 15 between both divided parts (see FIG. 4A). ). Applying welding W3 to the front end portion of the rectifying portion 33 that has entered the inside of the first divided part 31 or the vicinity thereof, and fixing the front end portion or the vicinity thereof to the inner wall surface of the first divided part 31 by welding. Is preferred. By performing welding W3, the support of the rectification | straightening part 33 in a scroll part becomes reliable, and the durable reliability of a turbine housing further improves.

本実施形態のタービンハウジングは、図５のグラフに示すような流路断面積を有している。即ち、ガス導入部１２の流路断面積は、ガス入口１３ａ（断面積Ｓ１）からスクロール本体部１１の巻き始め位置（断面積Ｓ２）に向かうにつれて絞り込まれている。他方、スクロール本体部１１の流路断面積は、ガス導入部におけるほどの急峻な変化はないものの、巻き始め位置から巻き終わり位置に向けて徐々に減少する傾向にある。特に、当該タービンハウジングに前記整流部３３が存在しない場合におけるスクロール本体部１１の巻き終り位置での流路断面積をＡｅとした場合（図５の太破線の場合）、本実施形態では、整流部３３によって前記Ａｅの約１／３（即ち約３３％）が閉ざされ、その結果、スクロール本体部１１の巻き終り位置での流路断面積が前記Ａｅの約２／３（即ち約６７％）に設定されている。   The turbine housing of this embodiment has a flow path cross-sectional area as shown in the graph of FIG. That is, the flow path cross-sectional area of the gas introduction part 12 is narrowed down from the gas inlet 13a (cross-sectional area S1) toward the winding start position (cross-sectional area S2) of the scroll main body part 11. On the other hand, the flow passage cross-sectional area of the scroll body 11 has a tendency to gradually decrease from the winding start position to the winding end position, although it does not change as steeply as in the gas introduction section. In particular, when the flow passage cross-sectional area at the winding end position of the scroll main body 11 when the rectifying portion 33 does not exist in the turbine housing is Ae (in the case of the thick broken line in FIG. 5), in this embodiment, rectification is performed. About 1/3 (that is, about 33%) of the Ae is closed by the portion 33, and as a result, the flow passage cross-sectional area at the end of winding of the scroll body 11 is about 2/3 (that is, about 67%) of the Ae. ) Is set.

本実施形態によれば、ガス導入部１２を形成する第１及び第２分割パーツ３１，３２の一方（即ち第２分割パーツ３２）には、ガス入口１３ａから新規導入される排気ガスと還流排気ガスとの合流点において排気ガス流れを整流化するための整流部３３が一体形成されている。このため、整流板２４が別体化されていた従来のタービンハウジング（図１及び図２）に比べて、部品点数の削減および溶接工数の削減を図ることができる。また、第１及び第２分割パーツ３１，３２を結合するための溶接Ｗ１，Ｗ２は、接合境界１５に沿った位置での溶接だけで足り、従来例のような整流板２４の溶接が不要なので、従来例の場合よりも、溶接ビードの接近による耐久性の低下を回避することができる。   According to the present embodiment, the exhaust gas newly introduced from the gas inlet 13a and the recirculated exhaust gas are supplied to one of the first and second divided parts 31 and 32 (that is, the second divided part 32) forming the gas introduction part 12. A rectifying unit 33 for rectifying the exhaust gas flow is integrally formed at the junction with the gas. For this reason, compared with the conventional turbine housing (FIGS. 1 and 2) in which the current plate 24 is separated, the number of parts and the number of welding processes can be reduced. Further, the welding W1 and W2 for joining the first and second divided parts 31 and 32 need only be welded at positions along the joining boundary 15, and welding of the current plate 24 as in the conventional example is unnecessary. As compared with the conventional example, it is possible to avoid a decrease in durability due to the approach of the weld bead.

本実施形態では、スクロール本体部１１の巻き終り位置での流路断面積が、整流部３３を設けることで、タービンハウジングに整流部３３が存在しない場合におけるスクロール本体部１１の巻き終り位置での流路断面積Ａｅの約２／３となるように設定されている。かかる整流部３３の配設および巻き終り位置での流路断面積設定により、非鋳造製タービンハウジングにありがちな、排気干渉による過給性能の低下を効果的に防止することができる。特に、エンジンが最大出力に近い状態で回転し、排気ガスが高流量となっている場合の排気干渉を非常に効果的に回避することができる。   In the present embodiment, the flow passage cross-sectional area at the winding end position of the scroll main body portion 11 is provided with the rectifying portion 33, so that the scroll main body portion 11 at the winding end position when the rectifying portion 33 does not exist in the turbine housing is provided. It is set to be about 2/3 of the channel cross-sectional area Ae. By arranging the flow straightening portion 33 and setting the flow path cross-sectional area at the end of winding, it is possible to effectively prevent a decrease in supercharging performance due to exhaust interference, which is often found in non-cast turbine housings. In particular, exhaust interference when the engine rotates in a state close to the maximum output and the exhaust gas has a high flow rate can be avoided very effectively.

なお、本発明を完成するまでに幾多の試作実験を積み重ねた結果、非鋳造製タービンハウジングでの整流部３３の整流作用は、その整流部３３の形状の差異（具体的にはその整流部３３がストレート板形状かそれとも滑らかな湾曲板形状かといった違い）よりも、巻き終り位置での流路断面積をどの程度の大きさにし得る寸法を当該整流部３３が有するかの方がはるかに大きな影響を受けることが判明した。かかる技術的知見に基づいて、本実施形態の整流部３３は、当該整流部３３によって前記Ａｅの約１／３が閉ざされ、その結果、スクロール本体部１１の巻き終り位置での流路断面積が前記Ａｅの約２／３となるように寸法設定されている。なお、このような寸法設定が整流部３３の最善の寸法設定と思われるが、この寸法を中心として若干の寸法幅が許されることは言うまでもない。   In addition, as a result of accumulating many trial experiments until the completion of the present invention, the rectifying action of the rectifying unit 33 in the non-cast turbine housing is caused by the difference in the shape of the rectifying unit 33 (specifically, the rectifying unit 33). Is much larger than the size of the flow straightening section 33 so that the cross-sectional area of the flow path at the end of the winding can be made larger than the difference between the straight plate shape and the smooth curved plate shape). Turned out to be affected. Based on such technical knowledge, the rectifying unit 33 of the present embodiment is closed by about 1/3 of the Ae by the rectifying unit 33, and as a result, the cross-sectional area of the flow path at the winding end position of the scroll body 11. Is set to be about 2/3 of the Ae. Such a dimension setting seems to be the best dimension setting of the rectifying unit 33, but it goes without saying that a slight dimension width is allowed around this dimension.

［変更例］図３〜図５の上記実施形態では、第２分割パーツ３２の側に整流部３３を一体形成したが、第１分割パーツ３１の側に整流部３３を一体形成してもよく、又、第１及び第２分割パーツ３１，３２の双方にそれぞれ整流部３３を一体形成してもよい。   [Modification] In the above embodiment of FIGS. 3 to 5, the rectifying unit 33 is integrally formed on the second divided part 32 side. However, the rectifying unit 33 may be integrally formed on the first divided part 31 side. Further, the rectifying unit 33 may be integrally formed on both the first and second divided parts 31 and 32.

［付記］本発明の更に好ましい態様や追加的構成要件を以下に列挙する。
請求項１〜３において、前記第１及び第２分割パーツの一方に一体形成された整流部が、これら分割パーツの相互接合時にはその接合境界を超えて前記第１及び第２分割パーツのうちの他方の内側に入り込んでいること。更に、前記他方の分割パーツの内側に入り込んだ整流部の一部（例えば先端部）が、当該他方の分割パーツの内壁に対して溶接固定されていること。 [Additional remarks] Further preferable aspects and additional constituent elements of the present invention are listed below.
In Claims 1-3, the rectification part integrally formed in one of the 1st and 2nd division parts of the 1st and 2nd division parts exceeds the junction boundary at the time of mutual junction of these division parts. Being inside the other. Furthermore, a part of the rectification part (for example, the front end part) that has entered the inside of the other divided part is welded and fixed to the inner wall of the other divided part.

従来のタービンハウジングの正面図。The front view of the conventional turbine housing. 図１のタービンハウジングのガス導入部付近を示し、（ａ）は（ｂ）のＡ−Ａ線での断面図（横断面図）、（ｂ）は（ａ）のＢ−Ｂ線での断面図（平断面図）。FIG. 1 shows the vicinity of a gas introduction part of the turbine housing of FIG. Figure (plan view). 本発明の一実施形態に従うタービンハウジングの正面図。1 is a front view of a turbine housing according to an embodiment of the present invention. 図３のタービンハウジングのガス導入部付近を示し、（ａ）は（ｂ）のＡ−Ａ線での断面図（横断面図）、（ｂ）は（ａ）のＢ−Ｂ線での断面図（平断面図）。FIG. 3 shows the vicinity of a gas introduction part of the turbine housing of FIG. 3, (a) is a cross-sectional view (cross-sectional view) taken along line AA in (b), and (b) is a cross-sectional view taken along line BB in (a). Figure (plan view). 図３のタービンハウジングにおける流路断面積の変化状況を示すグラフ。The graph which shows the change condition of the flow-path cross-sectional area in the turbine housing of FIG.

符号の説明Explanation of symbols

１０…スクロール部、１１…スクロール本体部、１１ａ…略環状トンネル状のガス流路、１２…ガス導入部、１３ａ…ガス入口、１４ａ…ガス出口、３１…第１の分割パーツ、３２…第２の分割パーツ、３３…整流部。   DESCRIPTION OF SYMBOLS 10 ... Scroll part, 11 ... Scroll main-body part, 11a ... Substantially annular tunnel-shaped gas flow path, 12 ... Gas introduction part, 13a ... Gas inlet, 14a ... Gas outlet, 31 ... 1st division | segmentation part, 32 ... 2nd Divided parts, 33 ... rectifying part.

Claims (3)

巻き始め位置と巻き終り位置とがつながった略環状のガス流路を区画するスクロール本体部、及び、ガス入口から取り込んだ排気ガスを前記スクロール本体部の巻き始め位置に導くためのガス導入部を備えたタービンハウジングであって、
少なくとも前記ガス導入部は、相互に接合可能な第１分割パーツ及び第２分割パーツを含む複数のパーツを接合することにより形成され、
前記第１及び第２分割パーツの一方には、前記ガス入口から前記スクロール本体部の巻き始め位置に導入される排気ガスと、前記スクロール本体部を一巡して前記巻き終り位置から前記巻き始め位置に向かう還流排気ガスとの合流点において排気ガス流れを整流化するための整流部が一体形成されていることを特徴とするタービンハウジング。 A scroll main body section that defines a substantially annular gas flow path in which a winding start position and a winding end position are connected, and a gas introduction section that guides exhaust gas taken from the gas inlet to the winding start position of the scroll main body section. A turbine housing comprising:
At least the gas introduction part is formed by joining a plurality of parts including a first divided part and a second divided part that can be joined to each other,
One of the first and second divided parts includes an exhaust gas introduced from the gas inlet to the winding start position of the scroll main body, and the winding start position from the winding end position through the scroll main body. A turbine housing, in which a rectifying unit for rectifying the exhaust gas flow is integrally formed at a junction with the recirculated exhaust gas toward. 前記第１及び第２分割パーツは、それぞれ金属板材の板金加工によって形成されると共に、これら分割パーツの相互接合部に溶接を施すことにより一体化されて前記ガス導入部の本体部分を形成することを特徴とする請求項１に記載のタービンハウジング。   The first and second divided parts are each formed by sheet metal processing of a metal plate material, and are integrated by welding the mutual joints of these divided parts to form the main body portion of the gas introduction part. The turbine housing according to claim 1. 当該タービンハウジングに前記整流部が存在しない場合における前記スクロール本体部の巻き終り位置での流路断面積をＡｅとした場合、前記整流部によって前記Ａｅの２８〜３８％が閉ざされ、その結果、前記スクロール本体部の巻き終り位置での流路断面積が前記Ａｅの６２〜７２％となるように前記整流部が設けられていることを特徴とする請求項１又は２に記載のタービンハウジング。   When the flow passage cross-sectional area at the winding end position of the scroll main body when the rectifying unit is not present in the turbine housing is Ae, 28 to 38% of the Ae is closed by the rectifying unit. 3. The turbine housing according to claim 1, wherein the flow straightening portion is provided so that a flow path cross-sectional area at a winding end position of the scroll main body portion is 62 to 72% of the Ae.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011140897A (en) * 2010-01-06 2011-07-21 Nisshin Steel Co Ltd Turbine housing
JPWO2017195441A1 (en) * 2016-05-11 2019-01-31 株式会社Ihi Turbine housing and turbocharger

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002004871A (en) * 2000-04-19 2002-01-09 Aisin Takaoka Ltd Turbine housing for supercharger
JP2006161574A (en) * 2004-12-02 2006-06-22 Toyota Motor Corp Turbine housing for turbocharger
JP2007224827A (en) * 2006-02-23 2007-09-06 Aisin Takaoka Ltd Turbine housing

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002004871A (en) * 2000-04-19 2002-01-09 Aisin Takaoka Ltd Turbine housing for supercharger
JP2006161574A (en) * 2004-12-02 2006-06-22 Toyota Motor Corp Turbine housing for turbocharger
JP2007224827A (en) * 2006-02-23 2007-09-06 Aisin Takaoka Ltd Turbine housing

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011140897A (en) * 2010-01-06 2011-07-21 Nisshin Steel Co Ltd Turbine housing
JPWO2017195441A1 (en) * 2016-05-11 2019-01-31 株式会社Ihi Turbine housing and turbocharger

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