JP2005351193A - Turbo-charging device - Google Patents

Turbo-charging device Download PDF

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JP2005351193A
JP2005351193A JP2004173739A JP2004173739A JP2005351193A JP 2005351193 A JP2005351193 A JP 2005351193A JP 2004173739 A JP2004173739 A JP 2004173739A JP 2004173739 A JP2004173739 A JP 2004173739A JP 2005351193 A JP2005351193 A JP 2005351193A
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air
impeller
flow path
recirculation flow
blower
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Yukihiro Tsuji
幸浩 辻
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Hino Motors Ltd
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Hino Motors Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a turbo-charging device for improving air supply efficiency and enlarging an operational area. <P>SOLUTION: The turbo-charging device comprises an impeller 4 for forcibly feeding air and a recirculation flow passage 15 for returning the air forcibly fed by the impeller 4 to the upstream of the impeller 4. An outlet 16 of the recirculation flow passage 15 is made to cause a swirl of the returned air to the same direction as the rotational direction of the impeller 4. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、空気を圧送する過給装置に関するものである。   The present invention relates to a supercharging device that pumps air.

一般に、エンジンには、図４〜図７に示す如く、ターボチャージャ等の遠心式の過給装置１が備えられており、遠心式の過給装置１は、排気マニホールドからマフラへ排出される排気ガスにより回転駆動するタービン２と、タービン２の回転によって同軸上で回転することによりエアクリーナからの空気を圧縮してインタークーラへ送給するブロア（コンプレッサ）３とを備えている。   In general, the engine is provided with a centrifugal supercharger 1 such as a turbocharger as shown in FIGS. 4 to 7, and the centrifugal supercharger 1 is exhausted from an exhaust manifold to a muffler. A turbine 2 that is rotationally driven by gas, and a blower (compressor) 3 that compresses air from an air cleaner by being rotated coaxially with the rotation of the turbine 2 and supplies the compressed air to the intercooler.

ブロア３は、エアクリーナからの空気を圧送するブロアインペラ（インペラ）４と、ブロアインペラ４を回転可能に支持して周囲部を形成するハウジング５とを備えており、ハウジング５には、ブロアインペラ４ヘ向かう空気を受け入れるようエアクリーナからの吸気管（図示せず）に接続される開口部６と、圧縮した空気をインタークーラへ送給するよう流路を形成するスクロール部７とを備えている。ここで、図６中、８はブロアインペラ４の羽根、９はボス部、６ａは開口部６の内周面を示している。   The blower 3 includes a blower impeller (impeller) 4 that pumps air from an air cleaner, and a housing 5 that rotatably supports the blower impeller 4 to form a peripheral portion. The blower impeller 4 is provided in the housing 5. An opening 6 connected to an intake pipe (not shown) from an air cleaner so as to receive the air going to the air is provided, and a scroll part 7 forming a flow path for supplying compressed air to the intercooler. Here, in FIG. 6, 8 is a blade of the blower impeller 4, 9 is a boss portion, and 6 a is an inner peripheral surface of the opening 6.

一方、ブロア３の下流の流路には、図４に示す如く、ブロア３で圧送された空気を、バルブ１０を介してハウジング５の開口部６に戻すリサーキュレーション流路１１を備えており、リサーキュレーション流路１１は、過給装置１が図７に示す如く運転できないサージ領域（図７では高圧力比で低流量域）にある場合において、空気をブロアインペラ４の上流へ戻すことにより流量を増やし、ブロア３の使用領域にするものである（図７で説明すると、点Ａから点Ｂへ移動させている。）。ここで、図７中、ｑ１はエンジン吸気量、ｑ２はリサーキュレーション流路１１による増加量、Ｑはブロアインペラ４を通過する流量を示している。   On the other hand, the flow path downstream of the blower 3 is provided with a recirculation flow path 11 for returning the air pumped by the blower 3 to the opening 6 of the housing 5 via the valve 10 as shown in FIG. The recirculation flow path 11 returns air to the upstream side of the blower impeller 4 when the supercharger 1 is in a surge region where the supercharger 1 cannot be operated as shown in FIG. Thus, the flow rate is increased to make the use area of the blower 3 (in FIG. 7, it is moved from point A to point B). Here, in FIG. 7, q1 indicates the engine intake air amount, q2 indicates the increase amount by the recirculation flow path 11, and Q indicates the flow rate passing through the blower impeller 4.

なお、リサーキュレーション流路を備えたものは既に公開特許公報として示されている（例えば特許文献１参照。）。
特開平１１−１８２２５７号公報 In addition, what was provided with the recirculation flow path has already been shown as an open patent gazette (for example, refer patent document 1).
Japanese Patent Laid-Open No. 11-182257

しかしながら、ハウジング５に形成されるリサーキュレーション流路１１は、図５に示す如く、ハウジング５へ戻す出口１２が開口部６の中心に向いているため、リサーキュレーション流路１１からブロアインペラ４の上流へ戻す空気が、インタークーラからブロアインペラ４へ向かう空気に直交して導入され、図６に示す如く、ブロアインペラ４へ向かう空気の流れを乱して供給効率が低下するという問題があった。   However, as shown in FIG. 5, the recirculation flow path 11 formed in the housing 5 has an outlet 12 that returns to the housing 5 toward the center of the opening 6, so that the blower impeller 4 extends from the recirculation flow path 11. The air returning to the upstream side of the air is introduced perpendicularly to the air going from the intercooler to the blower impeller 4 and, as shown in FIG. 6, the flow of air going to the blower impeller 4 is disturbed and the supply efficiency is lowered. It was.

本発明は上述の実情に鑑みてなしたもので、空気の供給効率を向上させると共に運転領域の拡大を図る過給装置を提供することを目的とする。   The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a supercharging device that improves air supply efficiency and expands an operation region.

本発明の請求項１は、空気を圧送するインペラと、インペラで圧送された空気をインペラの上流に戻すリサーキュレーション流路とを備えた過給装置であって、
リサーキュレーション流路の出口は、戻される空気がインペラの回転方向と同じ方向へスワール流を起すように構成されたことを特徴とする過給装置、にかかるものである。 Claim 1 of the present invention is a supercharging device comprising an impeller that pumps air and a recirculation passage that returns the air pumped by the impeller to the upstream side of the impeller,
The outlet of the recirculation flow path is related to a supercharging device configured such that the returned air causes a swirl flow in the same direction as the rotation direction of the impeller.

本発明の請求項２は、インペラへ向かう空気を受け入れるよう開口部を形成したハウジングを備え、リサーキュレーション流路の出口は、戻される空気が開口部の内周面に沿って導入されるよう構成された請求項１記載の過給装置、にかかるものである。   According to a second aspect of the present invention, there is provided a housing in which an opening is formed so as to receive the air toward the impeller, and the air to be returned is introduced along the inner peripheral surface of the opening at the outlet of the recirculation flow path. The supercharger according to claim 1 configured.

このように、リサーキュレーション流路の出口により、リサーキュレーション流路から戻される空気がインペラの回転方向と同じ方向へスワール流を起すので、インペラへ向かう空気の流れを乱すことを低減し、空気の供給効率を向上させることができる。又、リサーキュレーション流路から戻される空気がインペラの回転方向と同じ方向へスワール流を起すので、インペラの羽根に流入する空気流と、インペラの羽根との角度が小さくなり、インペラの羽根の裏側に生じる剥離流を低減し、運転領域の拡大を図ることができる。   In this way, because the air returned from the recirculation flow path causes a swirl flow in the same direction as the impeller rotation direction, the disturbance of the air flow toward the impeller is reduced by the outlet of the recirculation flow path. The air supply efficiency can be improved. In addition, since the air returned from the recirculation flow path causes a swirl flow in the same direction as the impeller rotation direction, the angle between the air flow flowing into the impeller blades and the impeller blades becomes small, and the impeller blades The separation flow generated on the back side can be reduced, and the operation range can be expanded.

又、リサーキュレーション流路の出口は、戻される空気が開口部の内周面に沿って導入されるよう構成されると、戻される空気がスワール流を容易に起し得るので、インペラへ向かう空気の流れを乱すことを一層低減し、空気の供給効率を向上させる。   Also, the outlet of the recirculation flow path is configured such that when the returned air is introduced along the inner peripheral surface of the opening, the returned air can easily cause a swirl flow, so that it goes to the impeller. The disturbance of the air flow is further reduced, and the air supply efficiency is improved.

上記した本発明の過給装置によれば、リサーキュレーション流路から戻される空気がインペラの回転方向と同じ方向へスワール流を起すので、インペラへ向かう空気の流れを乱すことを低減し、空気の供給効率を向上させると共に運転領域の拡大を図るという優れた効果を奏し得る。   According to the supercharging device of the present invention described above, the air returned from the recirculation flow path causes a swirl flow in the same direction as the impeller rotation direction, thereby reducing the disturbance of the air flow toward the impeller, and the air It is possible to achieve an excellent effect of improving the supply efficiency and expanding the operation range.

以下本発明の実施の形態を図面を参照しつつ説明する。   Embodiments of the present invention will be described below with reference to the drawings.

図１は本発明の過給装置を実施する形態例を示す正面概略図、図２は本発明の過給装置を実施する形態例を示す側面概略図、図３はリサーキュレーション流路から空気を導入した場合及び通常のブロアインペラに対する速度三角形を示す概念図であり、図４〜図６と同一の符号を付した部分は同一物を表わしている。   FIG. 1 is a schematic front view showing an embodiment of the supercharging device of the present invention, FIG. 2 is a schematic side view showing an exemplary embodiment of the supercharging device of the present invention, and FIG. 3 shows air from the recirculation flow path. FIG. 7 is a conceptual diagram showing a speed triangle for a normal blower impeller and the parts denoted by the same reference numerals as in FIGS. 4 to 6 represent the same thing.

図１、図２に示す如く、本発明の形態例の遠心式の過給装置において、ブロア３のブロアインペラ（インペラ）４を回転可能に支持するハウジング１３には、ブロアインペラ４ヘ向かう空気を受け入れるようエアクリーナからの吸気管（図示せず）に接続される筒状の開口部１４を備えている。   As shown in FIGS. 1 and 2, in the centrifugal supercharging device according to the embodiment of the present invention, the housing 13 that rotatably supports the blower impeller (impeller) 4 of the blower 3 receives air toward the blower impeller 4. A cylindrical opening 14 connected to an intake pipe (not shown) from the air cleaner is provided for receiving.

ブロア３の下流の流路には、ブロアインペラ４で圧送された空気をハウジング１３の開口部１４に戻すリサーキュレーション流路１５を備え、リサーキュレーション流路１５の出口１６は、開口部１４の中心方向とオフセットして、インペラの上流に戻す空気がインペラの回転方向と同じ方向へスワール流を起すように構成されており、特に具体的には、リサーキュレーション流路１５の出口１６は、開口部１４の内周面１４ａに沿うよう接線方向で接続されている。   The flow path downstream of the blower 3 is provided with a recirculation flow path 15 for returning the air pressure-fed by the blower impeller 4 to the opening section 14 of the housing 13, and the outlet 16 of the recirculation flow path 15 has an opening section 14. The air returning to the upstream side of the impeller is configured to cause a swirl flow in the same direction as the rotation direction of the impeller, and specifically, the outlet 16 of the recirculation flow path 15 is In addition, they are connected in a tangential direction along the inner peripheral surface 14 a of the opening 14.

以下、本発明の実施の形態例の作用を説明する。   The operation of the embodiment of the present invention will be described below.

ブロアインペラ４で圧送された空気をリサーキュレーション流路１５によりブロアインペラ４の上流に戻す際には、リサーキュレーション流路１５の出口１６により、ブロアインペラ４の上流に戻された空気がブロアインペラ４の回転方向と同じ方向へスワール流を起す。   When the air pumped by the blower impeller 4 is returned to the upstream side of the blower impeller 4 by the recirculation flow path 15, the air returned to the upstream side of the blower impeller 4 by the outlet 16 of the recirculation flow path 15 is blown to the blower. A swirl flow is generated in the same direction as the rotation direction of the impeller 4.

この時、ブロアインペラ４の羽根８に流入する空気流を、スワール流がある空気流Ａ１の場合と、スワール流がない通常の空気流Ａ０の場合とで比較すると、図３に示す如く、スワール流がある空気流Ａ１とブロアインペラ４の羽根８との角度θ１は、スワール流がない空気流Ａ０とブロアインペラ４の羽根８との角度θ０に比べて小さくなり（θ０＞θ１）、ブロアインペラ４の羽根８の裏側に生じる剥離流Ｄを低減し、ブロアインペラ４の性能を向上させる。 At this time, the air flow into the vanes 8 of the blower impeller 4, in the case of the air flow A 1 there is swirl flow, when compared with the case of normal air flow A 0 no swirling flow, as shown in FIG. 3 The angle θ 1 between the air flow A 1 with the swirl flow and the blade 8 of the blower impeller 4 is smaller than the angle θ 0 between the air flow A 0 without the swirl flow and the blade 8 of the blower impeller 4 (θ 0 > θ 1 ), the separation flow D generated on the back side of the blade 8 of the blower impeller 4 is reduced, and the performance of the blower impeller 4 is improved.

このように、本発明の形態例によれば、リサーキュレーション流路１５から戻される空気がブロアインペラ４の回転方向と同じ方向へスワール流を起すので、ブロアインペラ４へ向かう空気の流れを乱すことを低減し、空気の供給効率を向上させることができる。又、リサーキュレーション流路１５から戻される空気がブロアインペラ４の回転方向と同じ方向へスワール流を起すので、ブロアインペラ４の羽根８の裏側に生じる剥離流Ｄを低減し、運転領域の拡大を図ることができる。   Thus, according to the embodiment of the present invention, the air returned from the recirculation flow path 15 causes a swirl flow in the same direction as the rotation direction of the blower impeller 4, thereby disturbing the air flow toward the blower impeller 4. This can reduce the air supply efficiency. Further, since the air returned from the recirculation flow path 15 causes a swirl flow in the same direction as the rotation direction of the blower impeller 4, the separation flow D generated on the back side of the blade 8 of the blower impeller 4 is reduced and the operation area is expanded. Can be achieved.

又、リサーキュレーション流路１５の出口１６は、戻される空気が開口部１４の内周面１４ａに沿って導入されるよう構成されると、スワール流を容易に起し得るので、ブロアインペラ４へ向かう空気の流れを乱すことを一層低減し、空気の供給効率を向上させることができる。   Further, the outlet 16 of the recirculation flow path 15 can easily generate a swirl flow when the returned air is configured to be introduced along the inner peripheral surface 14 a of the opening 14. It is possible to further reduce the disturbance of the air flow toward the air and improve the air supply efficiency.

尚、本発明の過給装置は、上述の形態例にのみ限定されるものではなく、本発明の要旨を逸脱しない範囲内において種々変更を加え得ることは勿論である。   Note that the supercharging device of the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the gist of the present invention.

本発明の過給装置を実施する形態例を示す正面概略図である。It is the front schematic which shows the example which implements the supercharging device of this invention. 本発明の過給装置を実施する形態例を示す側面概略図である。It is a side schematic diagram showing an embodiment which carries out a supercharging device of the present invention. リサーキュレーション流路から空気を導入した場合及び通常の場合の夫々に対する速度三角形を示す概念図である。It is a conceptual diagram which shows the speed triangle with respect to each of the case where air is introduce | transduced from a recirculation flow path, and a normal case. 従来の過給装置の作用を示す概念図である。It is a conceptual diagram which shows the effect | action of the conventional supercharging apparatus. 従来の過給装置を示す正面概略図であるIt is a front schematic diagram showing a conventional supercharging device 従来の過給装置を示す側面概略図である。It is a side schematic diagram showing a conventional supercharging device. リサーキュレーションの原理を示すグラフである。It is a graph which shows the principle of recirculation.

符号の説明Explanation of symbols

１ 過給装置
４ ブロアインペラ（インペラ）
１３ ハウジング
１４ 開口部
１４ａ 内周面
１５ リサーキュレーション流路
１６ 出口 1 Supercharger 4 Blower impeller (impeller)
13 Housing 14 Opening 14a Inner peripheral surface 15 Recirculation flow path 16 Outlet

Claims (2)

空気を圧送するインペラと、インペラで圧送された空気をインペラの上流に戻すリサーキュレーション流路とを備えた過給装置であって、
リサーキュレーション流路の出口は、戻される空気がインペラの回転方向と同じ方向へスワール流を起すように構成されたことを特徴とする過給装置。 A supercharging device comprising an impeller that pumps air and a recirculation flow path that returns air pumped by the impeller to the upstream side of the impeller,
The supercharging device, wherein the outlet of the recirculation flow path is configured such that the returned air causes a swirl flow in the same direction as the rotation direction of the impeller. インペラへ向かう空気を受け入れるよう開口部を形成したハウジングを備え、リサーキュレーション流路の出口は、戻される空気が開口部の内周面に沿って導入されるように構成された請求項１記載の過給装置。   2. The housing according to claim 1, further comprising a housing formed with an opening for receiving air toward the impeller, wherein the outlet of the recirculation flow path is configured such that the returned air is introduced along the inner peripheral surface of the opening. Supercharger.
JP2004173739A 2004-06-11 2004-06-11 Turbo-charging device Pending JP2005351193A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7343742B2 (en) * 2004-08-24 2008-03-18 Bayerische Motoren Werke Aktiengesellschaft Exhaust turbocharger
FR2927364A1 (en) * 2008-02-11 2009-08-14 Renault Sas Supercharged internal combustion engine i.e. supercharged oil engine, for terrestrial vehicle, has connection device placed in such manner that air and gas circulating are introduced in intake circuit while creating swirling movement
US20130283788A1 (en) * 2010-11-16 2013-10-31 Ihi Corporation Low-pressure loop egr device
EP2682592A2 (en) 2012-07-06 2014-01-08 Kabushiki Kaisha Toyota Jidoshokki Intake air supply structures of turbo superchargers
CN111670297A (en) * 2018-07-13 2020-09-15 三菱重工发动机和增压器株式会社 Centrifugal compressor and turbocharger

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7343742B2 (en) * 2004-08-24 2008-03-18 Bayerische Motoren Werke Aktiengesellschaft Exhaust turbocharger
FR2927364A1 (en) * 2008-02-11 2009-08-14 Renault Sas Supercharged internal combustion engine i.e. supercharged oil engine, for terrestrial vehicle, has connection device placed in such manner that air and gas circulating are introduced in intake circuit while creating swirling movement
US20130283788A1 (en) * 2010-11-16 2013-10-31 Ihi Corporation Low-pressure loop egr device
EP2682592A2 (en) 2012-07-06 2014-01-08 Kabushiki Kaisha Toyota Jidoshokki Intake air supply structures of turbo superchargers
CN111670297A (en) * 2018-07-13 2020-09-15 三菱重工发动机和增压器株式会社 Centrifugal compressor and turbocharger
JPWO2020012648A1 (en) * 2018-07-13 2021-06-03 三菱重工エンジン＆ターボチャージャ株式会社 Centrifugal compressor and turbocharger
US11378095B2 (en) 2018-07-13 2022-07-05 Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. Centrifugal compressor and turbocharger
CN111670297B (en) * 2018-07-13 2022-07-26 三菱重工发动机和增压器株式会社 Centrifugal compressor and turbocharger
JP7157155B2 (en) 2018-07-13 2022-10-19 三菱重工エンジン＆ターボチャージャ株式会社 Centrifugal compressor and turbocharger

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