CN105378263B - 内燃机燃料、优选是柴油的供油泵总成 - Google Patents

内燃机燃料、优选是柴油的供油泵总成 Download PDF

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CN105378263B
CN105378263B CN201480039540.9A CN201480039540A CN105378263B CN 105378263 B CN105378263 B CN 105378263B CN 201480039540 A CN201480039540 A CN 201480039540A CN 105378263 B CN105378263 B CN 105378263B
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seal
valve body
pump assembly
fuel
axis
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CN105378263A (zh
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F·达米亚尼
R·格里诺
M·塔瓦尼
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Robert Bosch GmbH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/46—Valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/04—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps
    • F02M59/06—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps with cylinders arranged radially to driving shaft, e.g. in V or star arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • F02M59/102—Mechanical drive, e.g. tappets or cams
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/442—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston means preventing fuel leakage around pump plunger, e.g. fluid barriers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/46—Valves
    • F02M59/464—Inlet valves of the check valve type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0452—Distribution members, e.g. valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0452—Distribution members, e.g. valves
    • F04B1/0456—Cylindrical
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/102—Disc valves
    • F04B53/1022—Disc valves having means for guiding the closure member axially
    • F04B53/1025—Disc valves having means for guiding the closure member axially the guiding means being provided within the valve opening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/1087—Valve seats

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

一种内燃机燃料、优选是柴油的供油泵总成，该泵总成(1)包括泵体(2)；至少一个缸(6)，其形成在泵体(2)上，并沿轴线(A2)延伸；形成在泵体(2)上的阀座(12)，位于缸(6)的一端；用于选择性地控制供给到缸(6)的燃料的进口阀(18)，其容纳在阀座(12)内部并且包括阀体(25)；和在阀体(25)和泵体(2)之间绕轴线(A2)延伸并适配在阀座(12)内部的环形密封件(26)；该泵总成(1)的特征在于：所述阀体(25)定位成沿着阀体(25)的接触表面(45)接触环形密封件(26)，并靠近邻近密封件(26)的径向内周缘(46)的表面部分；所述阀体(25)沿着邻近密封件(26)的径向外周缘(52)的另一表面部分具有环形台阶(48)。

Description

内燃机燃料、优选是柴油的供油泵总成
技术领域
本发明涉及一种内燃机燃料、优选是柴油的供油泵总成。
特别地，本发明涉及一种内燃机燃料、优选是柴油的供油泵总成，所述泵总成包括泵体；至少一个缸，其形成在泵体上，并沿轴线延伸；在缸的一端处形成在泵体上的阀座；用于选择性地控制供给到缸的燃料的进口阀，其容纳在阀座内部并且包括阀体；和在阀体和泵体之间绕轴线延伸并适配在阀座内部的环形密封件。
背景技术
目前已知的上述类型的泵总成存在如下缺点，当使用高压燃料时可能会出现内部压力损失。本发明的目的是提供一种内燃机燃料、优选是柴油的供油泵总成，其不具有上述缺点，并且实现起来简单和廉价。
发明内容
根据本发明提供了一种内燃机燃料、优选是柴油的供油泵总成，所述泵总成包括泵体；至少一个缸，其形成在泵体上，并沿轴线延伸；在缸的一端处形成在泵体上的阀座；用于选择性地控制供给到缸的燃料的进口阀，其容纳在阀座内部并且包括阀体；和在阀体和泵体之间绕轴线延伸并适配在阀座内部的环形密封件；所述泵总成的特征在于：所述阀体定位成沿着阀体的接触表面接触环形密封件，并靠近邻近密封件的径向内周缘的表面部分；所述阀体沿着邻近密封件的径向外周缘的另一表面部分具有环形台阶。
由于本发明，阀体和密封件之间的接触表面面积比现有技术中的更小；所以阀体和密封件之间的接触压力比现有技术中的更大。通过这种方式，部件之间的相对运动和由此带来的磨损和内部压力的损失减少了。
根据一个优选实施例，环形台阶具有表面，该表面与密封件轴向分离，并径向上在密封件的表面的至少三分之一上延伸。
根据另一优选实施例，轴向分离的表面沿径向大于所述接触表面。
根据另一优选实施例，环形台阶被设计成：通过接触表面施加在密封件上的压力超过1600巴，优选超过4950巴。
根据另一优选实施例，泵体包括环形突起，该环形突起绕轴线延伸，并沿邻近密封件的径向内周缘的另一表面部分与密封件接触。根据另一优选实施例，进口阀包括闸门，该闸门能够沿轴线在开启位置和关闭位置之间移动，从而分别打开和关闭将燃料吸取到缸中的进口管道；还包括形成在阀体上的腔室，以用于还当闸门处于关闭位置时与缸相连通。
根据另一优选实施例，腔室被分成圆柱形部分和截头圆锥形部分；当闸门处于开启位置时，其至少部分地延伸出腔室的圆柱形部分之外。
根据另一优选实施例，腔室的直径大于闸门的直径。
根据另一优选实施例，腔室与闸门的轴线同轴地形成。
根据另一优选实施例，进口阀包括锁定部件，以用于通过设置在阀体和泵体之间的密封件将阀体锁定在泵体上。
附图说明
本发明现在将参照附图进行说明，在其中示出实施例的一个非限制性示例：
图1是根据本发明设计的泵体的剖视图，为了更清楚而部分省略；
图2是图1中所示的泵总成的细节放大图；
图3是图2中所示的泵总成的细节放大图。
具体实施方式
参照图1和2，1为用于向内燃机(未示出)供给燃料、优选是柴油燃料的泵总成的整体。
泵总成1包括：泵体2，其具有带有给定的纵向轴线Al的中心孔(未示出)；带有泵送缸的高压泵4，其用于将燃料供给到所述内燃发动机(未示出)；和齿轮泵(已知且未示出)，用于将燃料供给到泵4。
泵4包括至少一个头部5，头部5具有设置在其内部的缸6，缸6沿位于一平面内、横向于(优选垂直于)轴线Al的轴线A2延伸。此外，缸6可滑动地接合相应的泵送活塞7。
头部5具有穿过头部5与轴线A2同轴设置、并与缸6相连通的中心孔11。孔11限定出阀座12。
阀座12内部安置进口管道18，以用于选择性地控制燃料沿进口管道13供给到所述缸6内。
头部5还具有输送管道19，输送管道19与缸6相连通，并在输送管道19内部安置已知类型的输送阀21，以用于选择性地控制沿输送管道19至所述内燃发动机(未示出)的燃料供给。
活塞7通过驱动装置(在附图中未示出)以沿缸6做往复直线运动而进行移位，该往复直线运动包括用于吸取燃料进入缸6的进气冲程和用于压缩包括在所述缸内的燃料的压缩冲程。
进口阀门18包括阀体25，阀体25绕轴线A2延伸，并通过环形密封件26与头部5相接触，环形密封件26设置在阀体25与头部5之间并相对于轴线A2垂直安装，并通过锁定部件27、特别是封闭盖27被轴向地锁定在头部5内侧，封闭盖27被拧到处于阀座12内部的头部5的螺纹表面29上。
阀体25具有与轴线A2同轴延伸的中心孔28，且中心孔28包括面向缸6的加宽部分30和相对于缸6设置在部分30的相反侧上的狭窄部分31，并与孔28的加宽部分30相连通，且因此与所述进口管道13相连通。
进口阀门18还包括闸门35，闸门35穿过孔28安装并可沿轴线A2移动，以便在进口管道13的开启位置(未示出)和关闭位置(图2)之间移位。闸门35通过设置在阀体25和所述闸门35之间的弹簧37被移位进入-并通常保持在-它的关闭位置。
该部分30包括从环形密封件26延伸的腔室38，腔室38在阀体25中形成，以便即使当闸门35设置在其关闭位置也可以与缸6相连通。腔室38与轴线A2同轴形成。腔室38被分为圆柱形部分40和截头圆锥形部分41。截头圆锥形部分41被设计成具有邻近环形密封件26的较大基部和邻近闸门35的较小基部。
腔室38的直径大于闸门35的直径。
当闸门35处于其开启位置时，其至少部分地延伸出腔室38的圆柱形部分40之外。
此外，所述阀体25定位成：沿着阀体25的接触表面45接触环形密封件26，并靠近邻近密封件26的径向内周缘46的表面部分；所述阀体25沿着邻近密封件26的径向外周缘52的另一表面部分具有环形台阶48。
环形台阶48具有表面50，表面50与密封件26轴向分离，并径向上在密封件26的表面的至少三分之一上延伸。轴向分离的表面50沿垂直于轴线A2所延伸的尺寸大于接触表面45垂直于轴线A2的尺寸。
如上所述，阀体25通过封闭盖27被轴向锁定于头部5内。阶梯48设置成使得，在封闭盖27的推力下，通过接触表面45施加在密封件26上的压力大于1600巴。在一优选实施例中，阶梯48设置成使得，在封闭盖27的推力下，通过接触表面45施加在密封件26上的压力大于4950巴。
参照图2和3，泵体2包括环形突起55，环形突起55绕轴线A2延伸，并沿邻近密封件26的径向内周缘46的另一表面部分与密封件26接触。
联系上文可以得出，在活塞7的压缩冲程期间，即当进口管道18被关闭时，缸7内的燃料压力在孔11的狭窄部分31上和密封件26上、也在腔室38、并因此也在阀体25上施加大致横向于轴线A2的径向推力。
由于头部5、阀体25和密封件26都承受上述径向推力，头部5和密封件26的相对径向运动以及密封件26和阀体25的相对径向运动相对较小，因此头部5、阀体25和密封件26的磨损也相对有限。
此外，由于阀体25被设置成与密封件26沿着比现有技术更小的接触表面45接触，阀体25和密封件26之间的接触压力大于现有技术，因此阀体25和密封件26的相对运动相对较小。相比于现有技术，以这种方式密封件26和阀体25沿着接触表面45的磨损减少了，压力损失也同样减少。
进一步明确的是，本发明还包括未详细描述的实施方式和落入所附权利要求保护范围内的等同的实施方式。

Claims (9)

1.一种内燃机燃料的供油泵总成，该泵总成(1)包括：泵体(2)；至少一个缸(6)，其形成在泵体(2)上，并沿轴线(A2)延伸；在缸(6)的一端处形成在泵体(2)上的阀座(12)；用于选择性地控制供给到缸(6)的燃料的进口阀(18)，其容纳在阀座(12)内部并且包括阀体(25)；和在阀体(25)和泵体(2)之间绕轴线(A2)延伸并适配在阀座(12)内部的环形密封件(26)；其中，所述阀体(25)定位成沿着阀体(25)的接触表面(45)接触环形密封件(26)，并靠近邻近密封件(26)的径向内周缘(46)的表面部分；所述阀体(25)沿着邻近密封件(26)的径向外周缘(52)的另一表面部分具有环形台阶(48)，其中，所述环形台阶(48)具有表面(50)，该表面(50)与密封件(26)轴向分离，其中，轴向分离的表面(50)沿垂直于轴线(A2)延伸的尺寸大于接触表面(45)的垂直于轴线(A2)的尺寸，其中，所述进口阀(18)包括闸门(35)，该闸门(35)能够沿轴线(A2)在开启位置和关闭位置之间移动，从而分别打开和关闭将燃料吸取到缸(6)中的进口管道(13)；还包括形成在阀体(25)上的腔室(38)，以用于当闸门(35)处于关闭位置时与缸(6)相连通，该泵总成(1)的特征在于，所述腔室(38)被分成相应地由阀体(25)的圆柱形壁和阀体(25)的截头圆锥形壁限定出的圆柱形部分(40)和截头圆锥形部分(41)；其中，环形台阶(48)邻近阀体的圆柱形壁，阀体的圆柱形壁位于密封件(26)与阀体的截头圆锥形壁之间；其中，当闸门(35)处于关闭位置时，闸门(35)接触阀体的截头圆锥形壁，当闸门(35)处于开启位置时，闸门(35)至少部分地延伸出腔室(38)的圆柱形部分(40)之外，腔室(38)的圆柱形部分(40)与密封件(26)邻近地定位。
2.根据权利要求1所述的供油泵总成，其特征在于，轴向分离的表面(50)在径向上在密封件(26)的表面的至少三分之一上延伸。
3.根据权利要求1所述的供油泵总成，其特征在于，所述环形台阶(48)被设计成：通过接触表面(45)施加在密封件(26)上的压力超过1600巴。
4.根据权利要求1至3中任一项所述的供油泵总成，其特征在于，所述泵体(2)包括环形突起(55)，该环形突起(55)绕轴线(A2)延伸，并沿邻近密封件(26)的径向内周缘(46)的另一表面部分与密封件(26)接触。
5.根据权利要求1至3中任一项所述的供油泵总成，其特征在于，所述腔室(38)的直径大于闸门(35)的直径。
6.根据权利要求1至3中任一项所述的供油泵总成，其特征在于，所述腔室(38)与闸门(35)的轴线(A2)同轴地形成。
7.根据权利要求1至3中任一项所述的供油泵总成，其特征在于，所述进口阀(18)包括锁定部件(27)，以用于通过设置在阀体(25)和泵体(2)之间的密封件(26)将阀体(25)锁定在泵体(2)上。
8.根据权利要求1所述的供油泵总成，其特征在于，所述内燃机燃料是柴油。
9.根据权利要求3所述的供油泵总成，其特征在于，通过接触表面(45)施加在密封件(26)上的压力超过4950巴。
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