CN101932820A - 抽吸喷射泵 - Google Patents

抽吸喷射泵 Download PDF

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CN101932820A
CN101932820A CN2008801259355A CN200880125935A CN101932820A CN 101932820 A CN101932820 A CN 101932820A CN 2008801259355 A CN2008801259355 A CN 2008801259355A CN 200880125935 A CN200880125935 A CN 200880125935A CN 101932820 A CN101932820 A CN 101932820A
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suction
jet pump
suction chamber
valve member
storage container
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CN101932820B (zh
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P·施密德
R·马莱茨
K·肖尔茨
J·卡德莱茨
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Robert Bosch GmbH
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/02Feeding by means of suction apparatus, e.g. by air flow through carburettors
    • F02M37/025Feeding by means of a liquid fuel-driven jet pump
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04FPUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/44Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04FPUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/44Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
    • F04F5/46Arrangements of nozzles
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04Feeding by means of driven pumps
    • F02M37/08Feeding by means of driven pumps electrically driven
    • F02M37/10Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir
    • F02M37/106Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir the pump being installed in a sub-tank
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/8593Systems
    • Y10T137/85978With pump
    • Y10T137/86035Combined with fluid receiver
    • Y10T137/86043Reserve or surge receiver
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/8593Systems
    • Y10T137/85978With pump
    • Y10T137/86075And jet-aspiration type pump
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/8593Systems
    • Y10T137/85978With pump
    • Y10T137/86171With pump bypass
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/8593Systems
    • Y10T137/87571Multiple inlet with single outlet
    • Y10T137/87587Combining by aspiration
    • Y10T137/87643With condition responsive valve

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Jet Pumps And Other Pumps (AREA)

Abstract

已公知了抽吸喷射泵,具有一个驱动管路(1),该驱动管路通过一个射流输出口通入抽吸室(3)中,其中该抽吸室具有一个与一阀件(6)相互配合的抽吸孔(5),流体通过该抽吸孔可被抽吸到所述抽吸室中。所述阀件与所述抽吸孔一起构成抽吸阀。所述抽吸喷射泵借助经由所述驱动管路流动的驱动流来驱动。该抽吸喷射泵被设置在一个储存容器(11)中及由一个燃料箱将燃料抽吸到储存容器中。在燃料箱中低液位的情况下可出现:部分地抽吸出空气及导入储存容器中,由此在储存容器中导致泡沫形成。而泡沫用其大容积排挤燃料,这可导致储存容器的局部排空。该效应被称为动态泄漏。描述抽吸容积流与驱动流的关系的特性曲线相对陡地变化。从抽吸喷射泵的抽吸区域中的一个临界负压区起才出现强泡沫的形成,这在下面被称为发泡界限。在根据本发明的抽吸喷射泵中,避免或至少减少了泡沫的形成。本发明提出,所述驱动管路具有一个通入所述抽吸室中的旁通孔(10),该旁通孔这样地设置,以致其旁通流作用到所述阀件上。

Description

抽吸喷射泵
技术领域
本发明涉及根据独立权利要求的类型的抽吸喷射泵。
背景技术
已经由DE 103 03 390 A1公知了一种抽吸喷射泵,它设有一个驱动管路,该驱动管路通过一个射流输出口通入抽吸室中,其中抽吸室具有一个与一阀件相互配合的抽吸孔,流体通过该抽吸孔可被抽吸到抽吸室中。阀件与抽吸孔一起构成一个抽吸阀。抽吸喷射泵借助一个通过驱动管路流动的驱动流来驱动。该抽吸喷射泵被设置在一个储存容器中及由一个燃料箱将燃料抽吸到储存容器中。在燃料箱中低液位的情况下可出现:部分地抽吸出空气及导入储存容器中,由此在储存容器中导致泡沫形成。而泡沫用其大容积排挤燃料,这可导致储存容器的局部排空。该效应被称为动态泄漏。描述抽吸容积流与驱动流的关系的特性曲线相对陡地变化。从抽吸喷射泵的抽吸区域中的一个临界负压区起才出现强泡沫的形成,这在下面被称为发泡界限。
由DE 198 28 934 A1公知了一种抽吸喷射泵,它设有一个驱动管路,该驱动管路在射流输出口的上游设有一个过压阀,该过压阀从预定压力起使驱动管路中的燃料通过一个阀输出口直接流出到储存容器中。
发明内容
相比之下根据本发明的具有独立权利要求特征部分的特征的抽吸喷射泵具有其优点,即可避免或至少减少泡沫的形成,其方式是驱动管路具有一个通入抽吸室中的旁通孔,该旁通孔被这样地设置,以致其旁通流作用到阀件上。以此方式可在抽吸孔上产生一个附加的、与驱动流直接相关的流体阻力,以致抽吸喷射泵的特性曲线比现有技术中的特性曲线更平缓地变化。因此该抽吸喷射泵可这样地设计,即在所需驱动流的范围中它的抽吸功率或它的抽吸流大于最小功率以及低于发泡界限。
通过从属权利要求中所述的措施可得到独立权利要求中给出的抽吸喷射泵的有利的进一步构型及改进。
根据一个有利的实施形式,旁通孔设置在阀件的上方的区域中。
特别有利的是,驱动管路用一个端部区段伸入抽吸室中,其中,旁通孔设置在该端部区段中。
此外有利的是,阀件部分地设置在抽吸室中,因为以此方式通过旁通孔流过的流体可最佳地作用在阀件上。
根据一个有利的构型提出,阀件被构成伞形的,因为这种阀可特别有利地被制造、可靠地密封及具有用于旁通孔的流体的大作用面。
本发明的实施例简化地表示在一个附图中及在以下的说明中详细地描述。
附图说明
该附图以截面表示根据本发明的一个抽吸喷射泵。
具体实施方式
该抽吸喷射泵具有一个驱动管路1,它通过一个射流输出口2通入一个抽吸室3中。射流输出口2例如以喷嘴形式变窄地作成。在抽吸室3上设有一个混合通道4,该混合通道被这样地设置在射流输出口2的一个假想的延长线上,以致由驱动管路1的射流输出口2输出的射流经由抽吸室3直线地到达混合通道4中。因此射流输出口2的横截面与混合通道4的横截面在投影图中相重叠。
抽吸喷射泵的作用原理已充分公知,由此在这里仅作简短的描述:通过驱动管路1及其射流输出口2使一个驱动流以射束形式导入抽吸室3。驱动流是任意的液体,但原则上也可为一种气体。驱动管路1的驱动射束将来自抽吸室3的周围的流体夹带到混合通道4中。由此在抽吸室3中形成一个负压,该负压使流体由抽吸喷射泵的外围通过抽吸室3的抽吸孔5续流到抽吸室3中。在抽吸孔5上设有一个阀件6,该阀件与抽吸孔5相互配合并与该抽吸孔构成一个止回阀。根据该实施形式阀件6被作成伞形,但也可构成其它任意形状,例如T形,双T形,锥形,球形,盘形或圆柱形。阀件6可被作成弹性的或刚性的。
根据本发明提出:驱动管路1具有一个通入抽吸室3的旁通孔10,该旁通孔被这样地构成,以致它的旁通流可间接或直接地作用在阀件6上。该旁通流以关闭的方式作用在阀件6上,即逆着止回阀的打开方向作用在阀件6上。例如旁通孔10这样地向着阀件6,以致旁通孔10的射束或流体击中阀件6。至少提出:旁通孔10的容积流在阀件6上流过及在此情况下流体力作用在该阀件上。
旁通孔10被这样地设计及布置,使得它的旁通流在阀件6上作用一个如此大的力,以致阀件6可在向着其阀座的方向上运动。旁通孔10可被这样地作成,以致阀件6可借助旁通孔10的旁通流完全地关闭。旁通孔10的直径必需小于驱动管路1的射流输出口2的直径。
以此方式在抽吸孔5上产生了一个附加的、与驱动流直接相关的流体阻力,以致当驱动流增大时愈多地减小抽吸功率的上升。由此描述通过抽吸孔5抽吸的体积流与驱动流的关系的特性曲线比现有技术中的曲线更平缓地变化。因此该抽吸喷射泵可这样地设计,即在所需驱动流的范围中它的抽吸功率大于最小功率以及低于临界的发泡界限。通过根据本发明的结构,可避免通过抽吸空气在混合通道4的下游形成泡沫或至少减少泡沫的形成。这便实现了自调节的抽吸喷射泵。
驱动管路1用一个区段1.1伸入抽吸室3中,其中旁通孔10位于区段1.1中。区段1.1的上游例如被作成一个相对区段1.1弯曲的区段1.2,其中旁通孔10例如被设置在拐弯的区域中。旁通孔10例如构成在区段1.1的向着底部的下侧上。抽吸孔5在底部14上设置在旁通孔10下面的区域中。
旁通孔10具有一个轴线10.1,该轴线朝着抽吸孔5或阀件6定向及可相对底部14垂直地或倾斜地延伸。轴线10.1可与抽吸孔5的轴线对齐。但抽吸孔5也可相对旁通孔10错开地布置。
根据图1的实施形式,抽吸喷射泵被设置在一个罐形的储存容器11中,该储存容器被设置在一个储备容器12中。抽吸喷射泵的抽吸室3例如被作成一侧张开的及用张开侧紧贴在储存容器11的底部14上,由此使抽吸室3的张开侧封闭。根据该实施例,抽吸室3的抽吸孔5被设置在储存容器11的底部14上,但也可被设置在抽吸喷射泵的壳体上。由抽吸孔5及阀件6构成的止回阀可防止流体由储存容器11通过混合通道4及抽吸室3回流到储备容器12中。
混合通道4例如水平地延伸在储存容器11的底部14的方向上。
在根据本发明的抽吸喷射泵中,驱动流的一部分通过射流输出口2及驱动流的其余部分通过旁通孔10均流到抽吸室3中。通过旁通孔10流动的部分在止回阀上产生一个其值与驱动流量相关的附加流体阻力或压力损耗。驱动流量愈大,所产生的压力损耗也愈大。在抽吸室3中旁通孔10的旁通流被抽吸并如通过抽吸孔5吸入的抽吸流一样地与驱动射束流一起通过混合通道4流入储存容器11中。
根据图1的本发明的抽吸喷射泵例如可使用在一个用于输送燃料的装置中。该装置例如具有一个输送装置16,该输送装置由储存容器11抽吸燃料及使燃料增高压力地通过压力管路17输送到一个内燃机18。由压力管路17分支出驱动管路1,其中可设置一个压力调节阀19,该压力调节阀从一个预定压力起才让燃料由压力管路17流出到驱动管路1中。储存容器11储存了用于输送装置16的足够的燃料,因此即使在燃料箱12中液位低时及当机动车加速、制动、弯道行驶和/或山路行驶时也可吸出燃料。通过根据本发明的抽吸喷射泵可避免通过抽吸空气使储存容器部分地排空及由此引起的泡沫形成。

Claims (6)

1.抽吸喷射泵,具有一个驱动管路,该驱动管路通过一个射流输出口通入抽吸室中,其中该抽吸室具有一个与一阀件相互配合的抽吸孔,流体通过该抽吸孔可被抽吸到所述抽吸室中,其特征在于:所述驱动管路(1)具有一个通入所述抽吸室(3)中的旁通孔(10),该旁通孔这样地设置,以致其旁通流作用到所述阀件(6)上。
2.根据权利要求1的抽吸喷射泵,其特征在于:所述旁通孔(10)设置在所述阀件(6)上方的区域中。
3.根据权利要求1的抽吸喷射泵,其特征在于:所述驱动管路(1)用一个端部区段(1.1)伸入所述抽吸室(3)中,其中所述旁通孔(10)设置在该端部区段(1.1)中。
4.根据权利要求1的抽吸喷射泵,其特征在于:所述阀件(6)部分地设置在所述抽吸室(3)中。
5.根据权利要求1的抽吸喷射泵,其特征在于:所述阀件(6)伞形、球形、盘形或圆柱形地构成。
6.用于输送燃料的装置,具有一个根据以上权利要求中任一项的抽吸喷射泵。
CN2008801259355A 2008-02-01 2008-12-09 抽吸喷射泵 Expired - Fee Related CN101932820B (zh)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102008007204.4A DE102008007204B4 (de) 2008-02-01 2008-02-01 Saugstrahlpumpe
DE102008007204.4 2008-02-01
PCT/EP2008/067068 WO2009095132A1 (de) 2008-02-01 2008-12-09 Saugstrahlpumpe

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CN101932820B CN101932820B (zh) 2013-08-21

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US (1) US8511340B2 (zh)
EP (1) EP2240680B1 (zh)
CN (1) CN101932820B (zh)
DE (1) DE102008007204B4 (zh)
WO (1) WO2009095132A1 (zh)

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US20100319793A1 (en) 2010-12-23
WO2009095132A1 (de) 2009-08-06
DE102008007204B4 (de) 2018-04-19
EP2240680B1 (de) 2017-11-01
DE102008007204A1 (de) 2009-08-06
CN101932820B (zh) 2013-08-21
EP2240680A1 (de) 2010-10-20
US8511340B2 (en) 2013-08-20

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