JP2020029884A - Air hose - Google Patents

Air hose Download PDF

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JP2020029884A
JP2020029884A JP2018154757A JP2018154757A JP2020029884A JP 2020029884 A JP2020029884 A JP 2020029884A JP 2018154757 A JP2018154757 A JP 2018154757A JP 2018154757 A JP2018154757 A JP 2018154757A JP 2020029884 A JP2020029884 A JP 2020029884A
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inner diameter
bellows
valley
air hose
pressure loss
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JP7176887B2 (en
Inventor
康晴 竹内
Yasuharu Takeuchi
康晴 竹内
純平 稲垣
Jumpei Inagaki
純平 稲垣
美津代 高橋
Mitsuyo Takahashi
美津代 高橋
宏之 天野
Hiroyuki Amano
宏之 天野
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Toyota Motor Corp
Toyoda Gosei Co Ltd
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Toyota Motor Corp
Toyoda Gosei Co 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

To reduce pressure loss of an air hose with a bellows part.SOLUTION: An air hose 5 for flowing air inside, comprises a bellows part 51 in which crest parts 51a having a large inner diameter and valley parts 51b having a small inner diameter are alternately formed in a flow direction. Since the inner diameter of the valley part 51b of the bellows part 51 increases toward the downstream, narrowing of an effective flow passage due to generation of turbulence and eddy current can be suppressed, and thus the pressure loss of the air hose 5 having the bellows part 51 can be reduced.SELECTED DRAWING: Figure 2

Description

本発明は、空気用ホースの蛇腹部の構造に関する。   The present invention relates to a structure of a bellows portion of an air hose.

空気等を流すホースにおいて、振動の伝達を抑制する目的やアライメント調整の目的で蛇腹部を設ける場合が多い。しかし、蛇腹部は内径が大きい山部と内径が小さい谷部とが交互に繰り返し形成される構造のため、蛇腹部の各山谷部分で乱流や渦流が発生する。これにより、主流がスムーズに流れる有効流路が狭まり圧力損失が増大する場合がある。このため、蛇腹部をスパイラル構造として圧力損失の低減を図ることが提案されている（例えば、特許文献１参照）。   In a hose for flowing air or the like, a bellows portion is often provided for the purpose of suppressing transmission of vibration or for the purpose of alignment adjustment. However, since the bellows portion has a structure in which ridges having a large inner diameter and valleys having a small inner diameter are formed alternately and repeatedly, turbulence and eddy currents are generated in each valley portion of the bellows. As a result, the effective flow path through which the main flow smoothly flows may be narrowed, and the pressure loss may increase. For this reason, it has been proposed to reduce the pressure loss by using the bellows portion as a spiral structure (for example, see Patent Document 1).

特開２００２−１０６７６１号公報JP-A-2002-106761

しかし、特許文献１に記載された従来技術の蛇腹ダクトでは、圧力損失の低減が十分ではなかった。   However, in the bellows duct of the related art described in Patent Literature 1, the pressure loss was not sufficiently reduced.

そこで、本発明は、蛇腹部を有する空気用ホースの圧力損失を低減することを目的とする。   Then, this invention aims at reducing the pressure loss of the air hose which has a bellows part.

本発明に係る空気用ホースは、内側に空気を流す空気用ホースであって、内径が大きい山部と内径が小さい谷部とが流れ方向に向かって交互に繰り返し形成されている蛇腹部を含み、蛇腹部の谷部の内径が下流に向かうにつれて大きくなること、を特徴とする。   The air hose according to the present invention is an air hose for flowing air inward, and includes a bellows portion in which ridges having a large inner diameter and valleys having a small inner diameter are alternately formed in the flow direction. The inner diameter of the valley portion of the bellows portion increases toward the downstream.

本発明は、蛇腹部の谷部の内径が下流に向かうにつれて大きくなることにより、乱流や渦流の発生による有効流路の狭まりを拡径により抑制できるため、蛇腹部を有する空気用ホースの圧力損失を低減することができる。   According to the present invention, since the inner diameter of the valley portion of the bellows portion increases toward the downstream, the narrowing of the effective flow path due to the generation of turbulence and eddy current can be suppressed by expanding the diameter. Loss can be reduced.

本開示の一実施形態である空気用ホースである吸気ホースを含むエンジン吸気系の概略図である。1 is a schematic diagram of an engine intake system including an intake hose that is an air hose according to an embodiment of the present disclosure. 図１におけるａ−ａ断面図である。It is aa sectional drawing in FIG. 本実施形態の吸気ホースの蛇腹部における有効流路の狭まりを説明する図である。It is a figure explaining narrowing of an effective flow path in a bellows part of an intake hose of this embodiment. 比較例１の吸気ホースの蛇腹部における有効流路の狭まりを説明する図である。FIG. 9 is a diagram illustrating a narrowing of an effective flow path in a bellows portion of the intake hose of Comparative Example 1. 蛇腹部の谷部内径を拡大する角度と圧力損失との関係を示す図である。It is a figure which shows the relationship between the angle which expands the valley inside diameter of a bellows part, and pressure loss.

以下、図面を参照しながら、実施形態の空気用ホースである吸気ホース５について説明する。図１に示したエンジン１は不図示の車両に走行用動力源として搭載される。図１に示すように、エンジン１には吸気通路２が接続されている。吸気通路２は、吸気ダクト３、エアクリーナ４、吸気ホース５及びスロットルバルブ６を備えている。吸気ダクト３から吸入されエアクリーナ４で濾過された空気は、吸気ホース５及びスロットルバルブ６を介してエンジン１に送り込まれる。エンジン１の振動がエアクリーナ４を固定している不図示のボデーに伝達することを抑制するために、吸気ホース５には、内径が大きくなって吸気ホース５の径方向外側に突出している山部５１ａと、内径が小さい谷部５１ｂとが流れ方向に向かって交互に繰り返し形成されている蛇腹部５１が設けられている。   Hereinafter, the intake hose 5 which is the air hose of the embodiment will be described with reference to the drawings. The engine 1 shown in FIG. 1 is mounted on a vehicle (not shown) as a driving power source. As shown in FIG. 1, an intake passage 2 is connected to the engine 1. The intake passage 2 includes an intake duct 3, an air cleaner 4, an intake hose 5, and a throttle valve 6. The air sucked from the intake duct 3 and filtered by the air cleaner 4 is sent to the engine 1 through the intake hose 5 and the throttle valve 6. In order to prevent the vibration of the engine 1 from being transmitted to a body (not shown) to which the air cleaner 4 is fixed, the intake hose 5 has a crest having a larger inner diameter and projecting radially outward of the intake hose 5. There is provided a bellows portion 51 in which a valley portion 51b and a valley portion 51b having a small inner diameter are alternately and repeatedly formed in the flow direction.

図２に示すように、蛇腹部５１の谷部５１ｂの内径は一定の角度θで下流に向かうにつれて大きくなり、蛇腹部５１より上流側の吸気ホース５の内径φ１よりも蛇腹部５１における下流側の谷部５１ｂの内径φ２の方が大きい。   As shown in FIG. 2, the inner diameter of the valley portion 51 b of the bellows portion 51 increases toward the downstream at a constant angle θ, and is located on the downstream side of the bellows portion 51 with respect to the inner diameter φ1 of the intake hose 5 upstream of the bellows portion 51. The inner diameter φ2 of the valley portion 51b is larger.

図３に示すように、蛇腹部５１では内径が大きい山部５１ａと内径が小さい谷部５１ｂとが交互に繰り返し形成されているため、空気の流れが蛇腹部５１の径方向内側に突出している谷部５１ｂに当たる度に渦を巻き、谷部５１ｂの付近の内側では乱流や渦流が発生する。そのため、主流がスムーズに流れる有効流路の径φ３が蛇腹部５１より上流側の吸気ホース５の内径φ１よりも小さくなる。しかし、下流に向かうにつれて谷部５１ｂの内径が大きくなるため、乱流や渦流の層の厚さＤ１の一部は谷部５１ｂの内径が拡大した分に吸収される。そのため、後で図４を参照して説明する谷部１５１ｂの内径が一定である比較例１の蛇腹構造よりも乱流や渦流の発生による有効流路の径φ３の狭まりを抑制でき、吸気ホース５の圧力損失を低減できる。   As shown in FIG. 3, in the bellows portion 51, a peak portion 51 a having a large inner diameter and a valley portion 51 b having a small inside diameter are formed alternately and repeatedly, so that the air flow projects radially inward of the bellows portion 51. Each time it hits the valley portion 51b, a vortex is formed, and turbulence and a vortex flow are generated inside the vicinity of the valley portion 51b. Therefore, the diameter φ3 of the effective flow path through which the main flow smoothly flows is smaller than the inner diameter φ1 of the intake hose 5 upstream of the bellows 51. However, since the inside diameter of the valley portion 51b increases toward the downstream, a part of the thickness D1 of the turbulent or eddy current layer is absorbed by an increase in the inside diameter of the valley portion 51b. Therefore, the narrowing of the diameter φ3 of the effective flow path due to the generation of turbulence and swirl can be suppressed as compared with the bellows structure of Comparative Example 1 in which the inner diameter of the valley 151b described later with reference to FIG. 5 can be reduced.

図４は、谷部１５１ｂの内径φ１が一定である比較例１の吸気ホース１５の蛇腹部１５１の断面図である。蛇腹部１５１の谷部１５１ｂの内径φ１は、図２及び図３の内径φ１と同一である。また、蛇腹部１５１の山部１５１ａ及び谷部１５１ｂの幅と深さは、本実施形態の蛇腹部５１と同一である。先に説明した本実施形態の蛇腹部５１と同様、谷部１５１ｂの内側に厚さＤ２の乱流や渦流の層が生じ、主流がスムーズに流れる有効流路の径φ５は谷部１５１ｂの内径φ１よりも厚さＤ２の２倍の分だけ小さくなる。比較例１では谷部１５１ｂの内径φ１が一定のため、本実施形態の吸気ホース５の蛇腹部５１とは異なり厚さＤ２が谷部１５１ｂの拡大した分に吸収されることはない。また、谷部１５１ｂの内径φ１が一定のため、谷部５１ｂの内径が下流に向かうにつれて大きくなる場合と比較して、谷部１５１ｂに当たって生じた渦流や乱流が、次の下流側の谷部１５１ｂに当たって生じた渦流や乱流と干渉することも多くなる。そのため、乱流や渦流の層の厚さＤ２は図３の厚さＤ１と比較して大きくなる傾向にある。以上の理由により、比較例１では本実施形態の吸気ホース５の蛇腹部５１のように、有効流路の径φ５の狭まりを抑制することができず、圧力損失が大きくなる。   FIG. 4 is a cross-sectional view of the bellows portion 151 of the intake hose 15 of Comparative Example 1 in which the inner diameter φ1 of the valley portion 151b is constant. The inner diameter φ1 of the valley portion 151b of the bellows portion 151 is the same as the inner diameter φ1 of FIGS. The width and depth of the peak 151a and the valley 151b of the bellows 151 are the same as those of the bellows 51 of the present embodiment. Similar to the bellows portion 51 of the present embodiment described above, a turbulent flow or a vortex layer having a thickness D2 is generated inside the valley portion 151b, and the diameter φ5 of the effective flow path through which the main flow smoothly flows is the inner diameter of the valley portion 151b. It becomes smaller than φ1 by twice the thickness D2. In Comparative Example 1, since the inner diameter φ1 of the valley portion 151b is constant, unlike the bellows portion 51 of the intake hose 5 of the present embodiment, the thickness D2 is not absorbed by the enlarged portion of the valley portion 151b. In addition, since the inner diameter φ1 of the valley 151b is constant, the vortex or turbulent flow generated on the valley 151b is generated by the next valley on the downstream side in comparison with the case where the inner diameter of the valley 51b increases toward the downstream. It often interferes with the eddy current or turbulence generated upon hitting 151b. Therefore, the thickness D2 of the turbulent or eddy layer tends to be larger than the thickness D1 in FIG. For the above reasons, in Comparative Example 1, unlike the bellows portion 51 of the intake hose 5 of the present embodiment, the narrowing of the diameter φ5 of the effective flow channel cannot be suppressed, and the pressure loss increases.

実施形態の蛇腹部５１の圧力損失の比較例１の圧力損失に対する低減量は、図２に示す拡大角度θを大きくするほど大きくなる。図５は、図２に示す拡大角度θが０度の比較例１、θが１．５度の実施例１及び、θが３．０度の実施例２の圧力損失の変化を示す。図５の点Ａが比較例１であり、点Ｂが実施例１であり、点Ｃが実施例２である。図５に示すように、拡大角度θが大きくなるほど圧力損失は低減し、実施例２のように拡大角度θを３．０度とした場合には、比較例１と比較して圧力損失を約２５パーセント低減できる。圧力損失低減の効果や吸気ホース５の径拡大を考慮すると、好ましい拡大角度θは０．５度から５．０度までであり、より好ましい拡大角度θは１．０度から３．０度までである。   The reduction amount of the pressure loss of the bellows portion 51 of the embodiment with respect to the pressure loss of Comparative Example 1 increases as the enlargement angle θ illustrated in FIG. 2 increases. FIG. 5 shows changes in pressure loss in Comparative Example 1 in which the enlarged angle θ shown in FIG. 2 is 0 °, Example 1 in which θ is 1.5 °, and Example 2 in which θ is 3.0 °. Point A in FIG. 5 is Comparative Example 1, Point B is Example 1, and Point C is Example 2. As shown in FIG. 5, the pressure loss decreases as the enlargement angle θ increases, and when the enlargement angle θ is set to 3.0 degrees as in the second embodiment, the pressure loss is reduced as compared with the comparative example 1. 25% reduction. In consideration of the effect of reducing the pressure loss and the diameter expansion of the intake hose 5, the preferable expansion angle θ is from 0.5 to 5.0 degrees, and the more preferable expansion angle θ is from 1.0 to 3.0 degrees. It is.

本開示の吸気ホース５は上述した形態に限定されず、本開示の要旨の範囲内において種々の形態にて実施できる。例えば、蛇腹部５１の谷部５１ｂの内径は一定の角度θで拡大し続ける必要はない。蛇腹部５１における上流側では拡大角度θを大きくして、蛇腹部５１における下流側では拡大角度θを小さくしてもよい。また、谷部５１ｂの内径を大きくし続けると吸気ホース５が太くなってしまうため、谷部５１ｂの内径を下流に向かうにつれて大きくなる蛇腹部５１を含めば、蛇腹部５１よりも下流の蛇腹構造の部分では谷部の内径が一定でもよい。また、谷部５１ｂの内径を大きくし続けて吸気ホース５が太くなり過ぎることを抑制するため、吸気ホース５のうち蛇腹部５１ではない部分で下流に向かうにつれて内径を徐々に縮小してもよい。また、本実施形態は車両用のエンジン１の吸気通路２に用いる吸気ホース５であるが、空調用など他の用途に用いる空気用ホースにも本実施形態の構成を適用できる。   The intake hose 5 of the present disclosure is not limited to the above-described embodiment, and may be implemented in various embodiments within the scope of the present disclosure. For example, the inner diameter of the valley portion 51b of the bellows portion 51 does not need to be continuously expanded at a constant angle θ. The enlargement angle θ may be increased on the upstream side of the bellows portion 51, and may be decreased on the downstream side of the bellows portion 51. Further, if the inner diameter of the valley portion 51b continues to increase, the intake hose 5 becomes thicker. Therefore, if the bellows portion 51 that increases as the inner diameter of the valley portion 51b goes downstream is included, the bellows structure downstream of the bellows portion 51 is included. May have a constant inner diameter of the valley. Further, in order to prevent the intake hose 5 from becoming too thick by continuing to increase the inner diameter of the valley portion 51b, the inner diameter may be gradually reduced toward a downstream portion of the intake hose 5 other than the bellows portion 51. . Although the present embodiment is the intake hose 5 used for the intake passage 2 of the vehicle engine 1, the configuration of the present embodiment can be applied to an air hose used for other uses such as air conditioning.

１ エンジン、２ 吸気通路、３ 吸気ダクト、４ エアクリーナ、５、１５ 吸気ホース、６ スロットルバルブ、５１、１５１ 蛇腹部、５１ａ、１５１ａ 山部、５１ｂ、１５１ｂ 谷部。   1 engine, 2 intake passages, 3 intake ducts, 4 air cleaners, 5 and 15 intake hoses, 6 throttle valves, 51 and 151 bellows, 51a and 151a peaks, 51b and 151b valleys.

Claims (1)

内側に空気を流す空気用ホースであって、
内径が大きい山部と内径が小さい谷部とが流れ方向に向かって交互に繰り返し形成されている蛇腹部を含み、
前記蛇腹部の前記谷部の内径が下流に向かうにつれて大きくなること、
を特徴とする空気用ホース。
An air hose for flowing air inside,
Including a bellows portion in which a ridge portion having a large inner diameter and a valley portion having a smaller inner diameter are alternately formed in the flow direction,
The inner diameter of the valley portion of the bellows portion increases toward the downstream,
Air hose.
JP2018154757A 2018-08-21 2018-08-21 air hose Active JP7176887B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022211178A1 (en) * 2021-03-28 2022-10-06 정재영 Hose for air cleaner having bellows structure for pressure loss reduction, and method for designing bellows

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WO2012093542A1 (en) * 2011-01-07 2012-07-12 パナソニック株式会社 Electrostatic atomization device
JP2013060821A (en) * 2011-09-12 2013-04-04 Hino Motors Ltd Intake pipe structure

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JP3873104B2 (en) 2002-03-22 2007-01-24 みのる産業株式会社 Granular conduit
JP2007010063A (en) 2005-06-30 2007-01-18 Inoac Corp Bellows pipe
KR101480355B1 (en) 2013-03-12 2015-01-09 주식회사 에스제이엠 Flexible Tube for Exhaust Pipe of Automobiles
JP2017078379A (en) 2015-10-21 2017-04-27 トヨタ紡織株式会社 Evaporated fuel adsorption filter for internal combustion engine and intake duct structure for internal combustion engine

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Publication number Priority date Publication date Assignee Title
WO2012093542A1 (en) * 2011-01-07 2012-07-12 パナソニック株式会社 Electrostatic atomization device
JP2013060821A (en) * 2011-09-12 2013-04-04 Hino Motors Ltd Intake pipe structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022211178A1 (en) * 2021-03-28 2022-10-06 정재영 Hose for air cleaner having bellows structure for pressure loss reduction, and method for designing bellows

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