WO2020098180A1 - 柱塞装置及内燃机 - Google Patents

柱塞装置及内燃机 Download PDF

Info

Publication number
WO2020098180A1
WO2020098180A1 PCT/CN2019/076981 CN2019076981W WO2020098180A1 WO 2020098180 A1 WO2020098180 A1 WO 2020098180A1 CN 2019076981 W CN2019076981 W CN 2019076981W WO 2020098180 A1 WO2020098180 A1 WO 2020098180A1
Authority
WO
WIPO (PCT)
Prior art keywords
plunger
supplied
fluid
hole
lubricating oil
Prior art date
Application number
PCT/CN2019/076981
Other languages
English (en)
French (fr)
Inventor
孙海东
郭永青
向桂蓉
Original Assignee
上海华羿汽车系统集成有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 上海华羿汽车系统集成有限公司 filed Critical 上海华羿汽车系统集成有限公司
Publication of WO2020098180A1 publication Critical patent/WO2020098180A1/zh

Links

Images

Classifications

    • 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
    • F02M59/02—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
    • F02M59/022—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 having an accumulator storing pressurised fuel during pumping stroke of the piston for subsequent delivery to the injector
    • 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
    • F02M59/466—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating means

Definitions

  • the present disclosure relates to the technical field of internal combustion engines, for example, to a plunger device and an internal combustion engine.
  • the present disclosure proposes a plunger device and an internal combustion engine.
  • the plunger device and the internal combustion engine have a simple structure, and can reduce the problems of leakage and wear when pumping oil.
  • a plunger device includes a body provided with a plunger hole, a fluid to be supplied inlet, a fluid to be supplied outlet and a lubricating oil inlet; a first plunger slidingly fits in the plunger hole ; The fluid chamber to be supplied formed between the first end of the first plunger and the inner wall of the plunger hole, the fluid inlet to be supplied and the fluid outlet to be supplied are both provided with The fluid chamber to be supplied is in communication; a second plunger is slidingly fitted in the plunger hole; the second end of the first plunger, the first end of the second plunger and the plunger A lubricating oil cavity formed between the inner walls of the hole; a first one-way valve, the lubricating oil inlet is provided to communicate with the lubricating oil cavity through the first one-way valve; and a pushing component is provided to the first The two plungers provide a force to move toward or away from the first plunger.
  • An embodiment provides an internal combustion engine including the plunger device described above.
  • FIG. 1 is a schematic structural view of a first plunger pump in an oil-absorbing state provided by an embodiment
  • FIG. 2 is a schematic structural diagram of a first plunger pump provided in an embodiment when it is in a pumping state
  • FIG. 3 is a schematic structural view of a second plunger pump according to an embodiment when it is in an oil-absorbing state
  • FIG. 4 is a schematic structural view of a second plunger pump provided in an embodiment when it is in a pumping state
  • FIG. 5 is a schematic structural view of a third plunger pump according to an embodiment when it is in an oil-absorbing state.
  • the plunger device is a plunger pump, and may also be a plunger injector or the like.
  • the plunger pump is used in an internal combustion engine to supply fuel, methanol, ethanol, and dimethyl ether to the main body of the internal combustion engine. The following takes the plunger device as a plunger pump and the fluid to be supplied as fuel as an example.
  • FIG. 1 is a schematic structural diagram of a plunger pump at the end of oil absorption provided by the specific embodiment
  • FIG. 2 is a plunger provided by the specific embodiment.
  • the plunger device provided in this embodiment includes a body 1, a first plunger 2, a second plunger 3, and a pushing assembly 4.
  • the body 1 is provided with a plunger hole, a fluid to be supplied inlet 5, a fluid to be supplied outlet 6 and a lubricating oil inlet 7.
  • Both the first plunger 2 and the second plunger 3 are arranged in the plunger hole in a precise sliding fit along the axial direction of the plunger hole.
  • the precision sliding fit means that the outer diameters of the first plunger 2 and the second plunger 3 are equal to or slightly smaller than the inner diameter of the plunger hole, respectively.
  • the gap between the first plunger 2 and the second plunger 3 and the plunger hole is as small as possible.
  • the axis of the first plunger 2 and the axis of the second plunger 3 are arranged collinear.
  • a fluid chamber 8 to be supplied is formed between the first end of the first plunger 2 and the inner wall of the plunger hole, and both the fluid inlet 5 and the fluid outlet 6 to be communicated with the fluid chamber 8 to be supplied, the first A lubricating oil chamber 9 is formed between the second end of the plunger 2, the first end of the second plunger 3 and the inner wall of the plunger hole, and the lubricating oil inlet 7 communicates with the lubricating oil chamber 9 through the first check valve 10.
  • the structure of each one-way valve in this specific embodiment may be the same or different.
  • the first one-way valve 10 is used as an example for introduction.
  • the one-way valve may include, but is not limited to, a first valve hole (not shown in the figure), a first valve core 101, and a third elastic return member 102.
  • the third elastic return member 102 is configured to provide a force for the first valve core 101 to block the first valve hole.
  • the first valve core 101 can move away from the first valve hole to open the one-way valve when the external pressure is sufficiently large.
  • the gap between the first plunger 2 and the second plunger 3 and the plunger hole is as small as possible to avoid mutual leakage between the lubricating oil and the fuel.
  • the pushing assembly 4 is configured to provide the second plunger 3 with a force to move toward the first plunger 2. In an embodiment, within the range of the stroke of the first plunger 2, the fluid chamber 8 to be supplied is not in communication with the lubricating oil chamber 9.
  • both the fluid inlet 5 and the fluid outlet 6 are connected to the fluid chamber 8 via a solenoid valve or a check valve.
  • a first solenoid valve 11 is provided at the fluid inlet 5 to be supplied.
  • the first solenoid valve 11 includes a solenoid 111, an armature 112, a second valve hole (not shown in the figure), a second valve core 113, and a fourth elastic return member 114.
  • the second valve core 113 can open the second valve hole Is switched between the open state of the second valve and the closed state of the second valve hole.
  • the fourth elastic return member 114 is configured to provide the second valve core 113 with the force in the open state.
  • the solenoid 111 When the solenoid 111 is energized, it can pass the armature 112 to the second valve
  • the core 113 provides the force in the closed state.
  • the second valve hole has a tapered shape, and the shape of the end of the second valve core 113 disposed to match the second valve hole matches the shape of the second valve hole.
  • the fourth elastic return member 114 may provide the second spool 113 with a force in a closed state, and when the solenoid 111 is energized, the armature 112 may provide the second spool 113 with a force in an open state.
  • the pushing assembly 4 includes a cam 41, and the cam 41 rotates to change the force on the second plunger 3, thereby causing the second plunger 3 to move closer to or away from the first post Plug 2 moves in the direction.
  • the pushing assembly 4 further includes a second elastic restoring member 42 that is configured to provide the second plunger 3 with a force to move away from the first plunger 2.
  • the second elastic return member 42 is a spring.
  • the pushing assembly 4 further includes a transmission frame 43 connected to the second plunger 3, the transmission frame 43 is slidably disposed in the plunger hole and the transmission frame 43 is located between the second end of the second plunger 3 and the cam 41, the transmission frame 43 A roller 44 abutting the cam 41 is provided on the side close to the cam 41.
  • the second elastic return member 42 is disposed between the side of the transmission frame 43 away from the cam 41 and the inner wall of the plunger hole. In one embodiment, the axis of the second elastic return member 42 is collinear with the axis of the second plunger 3.
  • the plunger device further includes a first plunger reset assembly, the first plunger reset assembly is provided to provide the first plunger 2 with a close proximity to the second plunger The force of plug movement in 3 directions.
  • the first plunger resetting assembly includes a first hooking portion 12 and a second hooking portion 13, the first hooking portion 12 is disposed at the second end of the first plunger 2, the second hooking portion 13 is provided at the first end of the second plunger 3, when the second plunger 3 moves away from the first plunger 2, the second hooking portion 13 and the first hooking portion 12 hook and move together, when the second When the plunger 3 moves toward the first plunger 2, the first hooking portion 12 and the second hooking portion 13 can be disengaged from the hooking relationship.
  • the solenoid 111 of the first solenoid valve 11 when sucking oil, the solenoid 111 of the first solenoid valve 11 is not energized, and the armature 112 and the second valve core 113 are pushed to the left by the fourth elastic return member 114 (the side away from the second valve hole) , The tapered end of the second valve core 113 is separated from the tapered surface of the second valve hole, and the first solenoid valve 11 is in an open state.
  • the lubricating oil pressure in the lubricating oil chamber 9 is not high, and the low-pressure lubricating oil can push the first check valve 10 from the lubricating oil inlet 7 to enter and fill the lubricating oil chamber 9 to supplement the slight leakage in the pump oil process lubricating oil.
  • the solenoid 111 of the first solenoid valve 11 when pumping oil, the solenoid 111 of the first solenoid valve 11 is energized, the armature 112 and the second spool 113 are attracted to the right by the electromagnetic force, so that the tapered end of the second spool 113 and the second valve The conical surface of the hole is compressed, the first solenoid valve 11 is closed, and the fluid chamber 8 to be supplied is disconnected from the fluid inlet 5 to be supplied.
  • the second spool 113 will quickly move to the left under the action of the fourth elastic return member 114, so that the first solenoid valve 11 is opened, and the fluid in the fluid chamber 8 is to be supplied.
  • the oil pressure instantly drops to low pressure, and the opening and closing of the first solenoid valve 11 can change the starting and ending moments of high-pressure fuel pumping.
  • the plunger device provided in this embodiment includes two plungers arranged up and down, and a lubricating oil chamber 9 communicating with the lubricating oil inlet 7 through the first check valve 10 is defined between the two plungers.
  • the lubricating oil chamber 9 The pressure of the lubricating oil inside can vary with the pressure of the fluid to be supplied, so that the pressures received by the two end faces of the first plunger 2 are approximately equal.
  • the lubricating oil pressure in the lubricating oil chamber 9 also increases, acting on the top surface of the first plunger 2 (that is, the The fuel pressure at the end face of the first end and the pressure acting on the bottom face of the first plunger 2 (ie the end face of the second end of the first plunger 2) are always equal, and since the first plunger 2 and the plunger hole Precise fit, there is only a very small annular gap between the first plunger 2 and the plunger hole, theoretically it can ensure that the fuel will not leak down into the lubricating oil chamber 9 and the lubricating oil will not go up to the fluid chamber to be supplied 8 leaks.
  • the pressure of the lubricating oil chamber 9 is very high, which may cause a slight leakage of lubricating oil from the annular gap between the second plunger 3 and the plunger hole, and the second plunger 3 can be well lubricated. In an embodiment, this will also result in a reduction in the lubricating oil in the lubricating oil chamber 9, but due to the high viscosity of the lubricating oil, the clearance between the second plunger 3 and the plunger hole is very small, so even under ultra-high pressure The leakage amount of lubricating oil is also very small.
  • the reduced amount of lubricating oil can be replenished from the lubricating oil inlet 7 into the lubricating oil chamber 9 through the first check valve 10 during the oil absorption process, while leaking from the second plunger 3
  • the trace amount of lubricating oil flowing into the casing reenters the low-pressure lubrication system.
  • the first plunger 2 descends, and the lubricating oil remaining on the inner wall of the lubricating oil chamber 9 can lubricate the first plunger 2, thereby solving the problems of fuel leakage and wear of the plunger pump under high pressure.
  • the plunger device provided in this specific embodiment has a simple structure, low processing difficulty, and low manufacturing cost; it can avoid leakage and plunger wear problems when pumping high-pressure fluids, especially low-viscosity fluids, can greatly increase the pumping pressure, and extend the plunger Pump life; the first plunger 2 and the second plunger 3 can be lubricated with lubricating oil during the movement, which improves the durability and reliability of the plunger pump; and the first plunger 2 and the fluid to be supplied Direct contact, while the second plunger 3 does not contact the fluid to be supplied, for pumping corrosive fluids such as methanol, the second plunger 3 does not have to use expensive corrosion-resistant materials, reducing manufacturing costs.
  • the structure of the first plunger resetting assembly is not limited to the above situation.
  • the first plunger resetting assembly includes a first elastic resetting member 14, which 14 is located between the first end of the first plunger 2 and the inner wall of the plunger hole.
  • the first elastic return member 14 is a spring.
  • the axis of the first elastic return member 14 is collinear with the axis of the first plunger 2.
  • the plunger device further includes a limit component, which defines a limit point when the first plunger 2 moves closer to the second plunger 3.
  • the structure of the limit component is not limited.
  • the limit component in this embodiment includes a limit protrusion 15 provided on the inner wall of the plunger hole or the first plunger 2 and a limit protrusion 15 provided on the first plunger 2 or The inner wall of the plunger hole is provided with a limiting surface 16 that is in contact with the limiting protrusion 15.
  • the limit protrusion 15 is a limit stop ring provided on the inner wall of the plunger hole, and the second end surface of the first plunger 2 is the limit surface 16; or
  • the middle or lower portion of the first plunger 2 may also form a stepped surface, and the stepped surface serves as the limiting surface 16.
  • the limit stop ring may be detachably installed in a groove on the inner wall of the plunger hole, and the limit stop ring may also be an integral structure with the inner wall of the plunger hole.
  • the limiting protrusion 15 is disposed on the first end surface of the first plunger 2, and the limiting surface 16 is a stepped surface disposed on the inner wall of the plunger hole.
  • the limiting component makes the first plunger 2 no longer continue to move toward the second plunger 3 when descending to the limit point, while the second plunger 3 is still moving away from the first plunger 2 at this time Only a small distance reaches the limit point, so the volume of the lubricating oil chamber 9 slightly increases, the pressure decreases, and the first check valve 10 opens to replenish the lubricating oil chamber 9 with the oil leaked during the pumping process.
  • the limit assembly can also effectively prevent the portion of the first plunger 2 that is arranged to precisely fit the plunger hole from communicating with the lubricating oil inlet 7.
  • a limiting component may also be provided to limit the stroke of the first plunger 2.
  • the volume of the lubricating oil chamber 9 expands slightly and the pressure decreases.
  • the low-pressure lubricating oil can push the first check valve 10 from the lubricating oil inlet 7 to enter and fill the lubricating oil chamber 9 to supplement the lubricating oil leaking in a small amount during the pumping process.
  • the specific embodiment also provides an internal combustion engine, which includes the above-mentioned plunger device.

Abstract

一种柱塞装置，包括本体（1）、第一柱塞（2）、第二柱塞（3）和推动组件（4），本体上设置有柱塞孔、待供送流体入口（5）、待供送流体出口（6）和润滑油入口（7），第一柱塞和第二柱塞均滑动配合于柱塞孔中，第一柱塞的第一端与柱塞孔的内壁之间形成待供送流体腔（8）；第一柱塞的第二端、第二柱塞的第一端和柱塞孔的内壁之间形成润滑油腔（9）。还提供一种内燃机。该柱塞装置和内燃机能减轻泵油时的泄露和磨损问题。

Description

柱塞装置及内燃机
本申请要求申请日为2018年11月14日、申请号为201811351630.8的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。
技术领域
本公开涉及内燃机技术领域，例如涉及一种柱塞装置及内燃机。
背景技术
随着全球环保标准的不断提高，柴油机甚至直喷汽油机的喷射压力也一直在增加。更高的喷射压力，带来更好的燃油雾化效果，有利于混合气充分迅速地燃烧，从而提高内燃机的经济性，改善排放水平。
但是，随着内燃机喷射压力的不断提高，一方面，相关技术中的柱塞式喷油泵的泄露和磨损也变得越来越厉害。如果润滑油向燃油里泄露，容易导致内燃机积碳，排放变差，而如果燃油向润滑油里泄露，将会导致润滑油稀释，机件容易磨损失效。
另一方面，近年来，为了应对日益严苛的排放要求，甲醇、乙醇及二甲醚等代用燃料在内燃机上也获得了一定的研究和应用，并有迅速扩大的趋势。这些代用燃料以及包括汽油在内的这些低粘度流体，在使用相关技术中的柱塞泵进行高压泵送时，因为粘度低，自润滑性能差，喷油泵的泄露和磨损比使用柴油时严重得多，影响内燃机的可靠性和耐用性。另外在一些场合，比如高压水切割、高压内胀成型及射流去毛刺等，一般也是采用水作为工作介质，同样因为水的粘度低，润滑性差，导致产生高压水的柱塞泵容易磨损失效。
发明内容
本公开提出了一种柱塞装置及内燃机，该柱塞装置及内燃机结构简单，能够减轻泵油时的泄露与磨损问题。
一种柱塞装置，包括：本体，所述本体上设置有柱塞孔、待供送流体入口、待供送流体出口和润滑油入口；第一柱塞，滑动配合于所述柱塞孔中；由所述第一柱塞的第一端与所述柱塞孔的内壁之间形成的待供送流体腔，所述待供送流体入口和所述待供送流体出口均设置为与所述待供送流体腔连通；第二柱塞， 滑动配合于所述柱塞孔中；由所述第一柱塞的第二端、所述第二柱塞的第一端和所述柱塞孔的内壁之间形成的润滑油腔；第一单向阀，所述润滑油入口设置为通过所述第一单向阀与所述润滑油腔连通；以及推动组件，设置为给所述第二柱塞提供向靠近或远离所述第一柱塞方向运动的力。
一实施例提供了一种内燃机，包括上述的柱塞装置。
附图说明
图1是一实施方式提供的第一种柱塞泵处于吸油状态时的结构示意图；
图2是一实施方式提供的第一种柱塞泵处于泵油状态时的结构示意图；
图3是一实施方式提供的第二种柱塞泵处于吸油状态时的结构示意图；
图4是一实施方式提供的第二种柱塞泵处于泵油状态时的结构示意图；
图5是一实施方式提供的第三种柱塞泵处于吸油状态时的结构示意图。
附图标记：
1、本体；2、第一柱塞；3、第二柱塞；4、推动组件；5、待供送流体入口；6、待供送流体出口；7、润滑油入口；8、待供送流体腔；9、润滑油腔；10、第一单向阀；11、第一电磁阀；12、第一钩合部；13、第二钩合部；14、第一弹性复位件；15、限位凸起；16、限位面；17、第二单向阀；18、第三单向阀；41、凸轮；42、第二弹性复位件；43、传动架；44、滚轮；101、第一阀芯；102、第三弹性复位件；111、电磁线圈；112、衔铁；113、第二阀芯；114、第四弹性复位件。
具体实施方式
在本申请的描述中，需要理解的是，术语“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。
本实施方式提供了一种柱塞装置，该柱塞装置在一实施例中为柱塞泵，也可以为柱塞喷油器等。在其他实施例中，柱塞泵应用于内燃机，以为内燃机主体供送燃油、甲醇、乙醇及二甲醚等燃料。以下以柱塞装置为柱塞泵，待供送流体为燃油为例进行介绍。
请参阅图1和图2，其中，图1所示为本具体实施方式提供的一种柱塞泵在吸油刚结束时的结构示意图，图2所示为本具体实施方式提供的一种柱塞泵在泵油过程中的结构示意图。本具体实施方式提供的柱塞装置包括本体1、第一柱塞2、第二柱塞3和推动组件4。本体1上设置有柱塞孔、待供送流体入口5、待供送流体出口6和润滑油入口7。第一柱塞2和第二柱塞3均沿柱塞孔的轴向精密滑动配合设置于柱塞孔中。其中，精密滑动配合是指第一柱塞2和第二柱塞3的外径分别等于或者略小于柱塞孔的内径，在能满足第一柱塞2和第二柱塞3沿柱塞孔滑动的前提下，第一柱塞2和第二柱塞3与柱塞孔间的间隙尽可能小。在一实施例中，第一柱塞2的轴线和第二柱塞3的轴线设置为共线。第一柱塞2的第一端与柱塞孔的内壁之间形成待供送流体腔8，待供送流体入口5和待供送流体出口6均与待供送流体腔8连通，第一柱塞2的第二端、第二柱塞3的第一端和柱塞孔的内壁之间形成润滑油腔9，润滑油入口7通过第一单向阀10与润滑油腔9连通。本具体实施方式中的每个单向阀的结构可以相同也可以不同。在一实施例中，以第一单向阀10为例进行介绍，单向阀可以但不局限为包括第一阀孔(图中未标出)、第一阀芯101和第三弹性复位件102，第三弹性复位件102设置为提供给第一阀芯101封堵第一阀孔的力，第一阀芯101可以在外界压力足够大时远离第一阀孔以开启单向阀。第一柱塞2和第二柱塞3与柱塞孔间的间隙尽可能小，可以避免润滑油和燃油间的相互泄露。推动组件4设置为给第二柱塞3提供向靠近第一柱塞2方向运动的力。在一实施例中，在第一柱塞2的行程范围内，待供送流体腔8与润滑油腔9是不连通的。
在一实施例中，待供送流体入口5和待供送流体出口6均为通过电磁阀或单向阀与待供送流体腔8连通。如图1和图2所示，在一个实施例中，待供送流体入口5处设置有第一电磁阀11。第一电磁阀11包括电磁线圈111、衔铁112、第二阀孔(图中未标出)、第二阀芯113和第四弹性复位件114，第二阀芯113能够在打开第二阀孔的打开状态和关闭第二阀孔的关闭状态之间转换，第四弹性复位件114设置为给第二阀芯113提供处于打开状态的力，电磁线圈111通电时能够通过衔铁112给第二阀芯113提供处于关闭状态的力。在一实施例中，第二阀孔为呈锥形，第二阀芯113设置为与第二阀孔配合的一端的形状与第二阀孔的形状相匹配。其他实施方式中，也可以使第四弹性复位件114给第二阀芯113提供处于关闭状态的力，电磁线圈111通电时能够通过衔铁112给第二阀芯113提供处于打开状态的力。
继续参阅图1和图2，在一实施例中，推动组件4包括凸轮41，凸轮41转动以改变对第二柱塞3的作用力，进而使得第二柱塞3向靠近或者远离第一柱塞2的方向运动。为了利于吸油，推动组件4还包括第二弹性复位件42，第二弹性复位件42设置为给第二柱塞3提供向远离第一柱塞2方向运动的力。在一实施例中，第二弹性复位件42为弹簧。推动组件4还包括与第二柱塞3连接的传动架43，传动架43滑动设置于柱塞孔中且传动架43位于第二柱塞3的第二端和凸轮41之间，传动架43靠近凸轮41的一侧上设置有与凸轮41抵接的滚轮44。第二弹性复位件42设置于传动架43远离凸轮41的一侧与柱塞孔的内壁之间。在一实施例中，第二弹性复位件42的轴线与第二柱塞3的轴线共线。
继续参阅图1和图2，为了进一步保证柱塞泵能够有效吸油，柱塞装置还包括第一柱塞复位组件，第一柱塞复位组件设置为给第一柱塞2提供向靠近第二柱塞3方向运动的力。在一实施例中，第一柱塞复位组件包括第一钩合部12和第二钩合部13，第一钩合部12设置于第一柱塞2的第二端，第二钩合部13设置于第二柱塞3的第一端，第二柱塞3向远离第一柱塞2方向运动时，第二钩合部13与第一钩合部12钩合并一同运动，当第二柱塞3向靠近第一柱塞2方向运动时，第一钩合部12和第二钩合部13可以脱离钩合关系。
以下结合图1和图2，简要介绍本具体实施方式的柱塞装置的工作原理：
如图1所示，吸油时，第一电磁阀11的电磁线圈111不通电，衔铁112和第二阀芯113被第四弹性复位件114推向左侧(远离第二阀孔的一侧)，第二阀芯113的锥形端与第二阀孔的锥面脱离，第一电磁阀11处于开启状态。且随着凸轮41的旋转，凸轮41顶点越过滚轮44后，第二弹性复位件42推动传动架43向下运动，传动架43牵引第二柱塞3下行，因为第一钩合部12和第二钩合部13嵌合，第一柱塞2也被拉拽向下运动，待供送流体腔8容积扩大，进入吸油过程，低压燃油从待供送流体入口5进入待供送流体腔8。这时，润滑油腔9中的润滑油压力不高，低压润滑油可以从润滑油入口7推开第一单向阀10进入并充满润滑油腔9，以补充在泵油过程中微量泄露的润滑油。
如图2所示，泵油时，第一电磁阀11的电磁线圈111通电，衔铁112和第二阀芯113被电磁力吸向右边，使第二阀芯113的锥形端与第二阀孔的锥面压紧，第一电磁阀11关闭，待供送流体腔8与待供送流体入口5断开。且凸轮41通过传动架43推动第二柱塞3向上运动，挤压润滑油腔9的空间，因为第一单向阀10具有单向密封作用，润滑油腔9里的润滑油压力升高，从而推动第一柱塞2向上运动， 挤压待供送流体腔8的空间，燃油从待供送流体出口6泵出，完成高压燃油的泵送。另外，泵送过程中，如果电磁线圈111断电，第二阀芯113将会在第四弹性复位件114作用下迅速左移，使第一电磁阀11开启，待供送流体腔8里的油压瞬间就降为低压，第一电磁阀11的开启和关闭，可以改变高压燃油泵送的起始和终止时刻。
本具体实施方式提供的柱塞装置，包括上下设置的两个柱塞，且两个柱塞间限定出通过第一单向阀10与润滑油入口7连通的润滑油腔9，润滑油腔9内的润滑油压力可随待供送流体的压力变化而变化，以使得第一柱塞2的两个端面所承受的压力大致相等。泵油过程中，待供送流体腔8里的燃油压力越高，润滑油腔9中的润滑油压力也同样升高，作用在第一柱塞2的顶面(即第一柱塞2的第一端的端面)的燃油压力和作用在第一柱塞2的底面(即第一柱塞2的第二端的端面)的压力总是相等的，且由于第一柱塞2和柱塞孔精密配合，第一柱塞2和柱塞孔之间只有非常小环形间隙，理论上可以保证燃油不会向下往润滑油腔9中渗漏，润滑油也不会向上往待供送流体腔8中渗漏。且泵油过程中，润滑油腔9的压力很高，会导致润滑油从第二柱塞3与柱塞孔之间的环形间隙微量泄漏，可以对第二柱塞3进行良好润滑。在一实施例中，这也会导致润滑油腔9里的润滑油减少，但是因为润滑油的粘度大，第二柱塞3与柱塞孔配合间隙又非常小，所以即便是超高压力下，润滑油的泄漏量也是非常小的，减少的润滑油量可以在吸油过程中从润滑油入口7通过第一单向阀10进入润滑油腔9中进行补充，而从第二柱塞3泄漏出的微量润滑油流到机壳里重新进入低压润滑系统。另外，吸油过程中第一柱塞2下行，润滑油腔9内壁上残留的润滑油可以对第一柱塞2进行润滑，从而解决了高压下燃油的泄露和柱塞泵的磨损问题。
本具体实施方式提供的柱塞装置结构简单、加工难度小、制造成本低；可以在泵送高压流体特别是低粘度流体时避免泄露和柱塞磨损问题，可以大幅提高泵送压力，延长柱塞泵寿命；第一柱塞2和第二柱塞3在运动过程中可以得到润滑油的润滑，提高了柱塞泵的耐久性和可靠性；且其中的第一柱塞2与待供送流体直接接触，而第二柱塞3不接触待供送流体，对于泵送腐蚀性的流体比如甲醇来说，第二柱塞3不必采用昂贵的耐腐蚀材料，降低了制造成本。
在一实施例中，第一柱塞复位组件的结构并不局限于上述情况，如图3和图4所示，第一柱塞复位组件包括第一弹性复位件14，该第一弹性复位件14位于第一柱塞2的第一端和柱塞孔的内壁之间。在一实施例中，第一弹性复位件14为弹 簧。在一实施例中，第一弹性复位件14的轴线与第一柱塞2的轴线共线。
如图3和图4所示，柱塞装置还包括限位组件，限位组件限定第一柱塞2在靠近第二柱塞3方向运动时的极限点。限位组件的结构不限，为了简化结构，本具体实施方式中限位组件包括设置于柱塞孔的内壁或第一柱塞2上的限位凸起15及设置于第一柱塞2或柱塞孔的内壁上，且设置为与限位凸起15抵接的限位面16。在一个实施例中，如图3和图4所示，限位凸起15为设置在柱塞孔内壁上的限位挡圈，第一柱塞2的第二端面为限位面16；或者也可以令第一柱塞2的中部或者下部形成台阶面，该台阶面作为限位面16。限位挡圈可以是可拆卸地安装在柱塞孔内壁上的凹槽中，限位挡圈也可以与柱塞孔的内壁为一体结构。在一实施例中，如图5所示，限位凸起15设置于在第一柱塞2的第一端面上，限位面16为设置在柱塞孔内壁上的台阶面。
限位组件使得第一柱塞2下行至极限点时不再继续向靠近第二柱塞3的方向运动，而此时第二柱塞3仍在向远离第一柱塞2的方向继续运动一微小距离才到达极限点，因而润滑油腔9的体积略微增加，压力降低，第一单向阀10打开以向润滑油腔9补充在泵油过程中泄露的润滑油。限位组件还可以有效避免第一柱塞2的设置为与柱塞孔精密配合的部分与润滑油入口7连通的情况发生。图1和图2所对应的实施例中，也可以设置限位组件以限定第一柱塞2的行程。
以下结合图3和图4，且以待供送流体入口5处设置有第二单向阀17和待供送流体出口6处设置有第三单向阀18为例再次简要介绍本具体实施方式的柱塞装置的工作原理：
如图3所示，吸油时，随着凸轮41的旋转，凸轮41顶点越过滚轮44后，第二弹性复位件42推动传动架43向下运动，第二弹性复位件42牵引第二柱塞3下行，同时，第一柱塞2也在第一弹性复位件14的作用下向下运动，待供送流体腔8的容积扩大，低压燃油经待供送流体入口5处的第二单向阀17被吸入待供送流体腔8。第一柱塞2的第二端抵靠到限位挡圈上以后，第二柱塞3还继续下行一微小距离才到达最低点，这时，润滑油腔9的容积略微扩大，压力降低，低压润滑油可以从润滑油入口7推开第一单向阀10进入并充满润滑油腔9，以补充在泵油过程中微量泄露的润滑油。
如图4所示，泵油时，凸轮41通过传动架43推动第二柱塞3向上运动，挤压润滑油腔9的空间，因为第一单向阀10的单向密封作用，润滑油腔9里的润滑油压力升高，从而推动第一柱塞2向上运动，挤压待供送流体腔8的空间，第二单 向阀17单向密封，燃油只能推开待供送流体出口6处的第三单向阀18泵出，从而完成高压燃油的泵送。
本具体实施方式还提供了一种内燃机，其包括上述柱塞装置。

Claims (10)

  1. 一种柱塞装置，其特征在于，包括：
    本体(1)，所述本体(1)上设置有柱塞孔、待供送流体入口(5)、待供送流体出口(6)和润滑油入口(7)；
    第一柱塞(2)，滑动配合于所述柱塞孔中；
    由所述第一柱塞(2)的第一端与所述柱塞孔的内壁之间形成的待供送流体腔(8)，所述待供送流体入口(5)和所述待供送流体出口(6)均设置为与所述待供送流体腔(8)连通；
    第二柱塞(3)，滑动配合于所述柱塞孔中；
    由所述第一柱塞(2)的第二端、所述第二柱塞(3)的第一端和所述柱塞孔的内壁之间形成的润滑油腔(9)；
    第一单向阀(10)，所述润滑油入口(7)设置为通过所述第一单向阀(10)与所述润滑油腔(9)连通；以及
    推动组件(4)，设置为给所述第二柱塞(3)提供向靠近或远离所述第一柱塞(2)方向运动的力。
  2. 根据权利要求1所述的柱塞装置，还包括第一柱塞复位组件，所述第一柱塞复位组件设置为给所述第一柱塞(2)提供向靠近所述第二柱塞(3)方向运动的力。
  3. 根据权利要求2所述的柱塞装置，其中，所述第一柱塞复位组件包括：
    第一钩合部(12)，设置于所述第一柱塞(2)的第二端，以及
    第二钩合部(13)，设置于所述第二柱塞(3)的第一端，所述第二钩合部(13)设置为当所述第二柱塞(3)向远离所述第一柱塞(2)方向运动时，与所述第一钩合部(12)钩合并一同运动；所述第二钩合部(13)设置为当所述第二柱塞(3)向靠近所述第一柱塞(2)方向运动时，与所述第一钩合部(12)脱离。
  4. 根据权利要求2所述的柱塞装置，其中，所述第一柱塞复位组件还包括：位于所述第一柱塞(2)的第一端和所述柱塞孔的内壁之间的第一弹性复位件(14)。
  5. 根据权利要求4所述的柱塞装置，还包括限位组件，所述限位组件设置为限定所述第一柱塞(2)在靠近所述第二柱塞(3)方向的运动的极限点。
  6. 根据权利要求5所述的柱塞装置，其中，所述限位组件包括设置于所述柱塞孔的内壁或所述第一柱塞(2)上的限位凸起(15)，及设置于所述第一柱塞 (2)或所述柱塞孔的内壁上，且与所述限位凸起(15)抵接的限位面(16)。
  7. 根据权利要求1至6任一项所述的柱塞装置，还包括电磁阀或单向阀，所述待供送流体入口(5)和所述待供送流体出口(6)均通过所述电磁阀或者所述单向阀与所述待供送流体腔(8)连通。
  8. 根据权利要求1至6任一项所述的柱塞装置，其中，所述推动组件(4)包括：
    凸轮(41)，设置为给所述第二柱塞(3)提供向靠近所述第一柱塞(2)方向运动的力；及
    第二弹性复位件(42)，设置为给所述第二柱塞(3)提供向远离所述第一柱塞(2)方向运动的力。
  9. 根据权利要求1至6任一项所述的柱塞装置，其中，所述柱塞装置为柱塞泵或者柱塞喷油器。
  10. 一种内燃机，包括如权利要求1至9任一项所述的柱塞装置。
PCT/CN2019/076981 2018-11-14 2019-03-05 柱塞装置及内燃机 WO2020098180A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201811351630.8A CN109209713B (zh) 2018-11-14 2018-11-14 一种柱塞装置及内燃机
CN201811351630.8 2018-11-14

Publications (1)

Publication Number Publication Date
WO2020098180A1 true WO2020098180A1 (zh) 2020-05-22

Family

ID=64995578

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/076981 WO2020098180A1 (zh) 2018-11-14 2019-03-05 柱塞装置及内燃机

Country Status (2)

Country Link
CN (1) CN109209713B (zh)
WO (1) WO2020098180A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109209713B (zh) * 2018-11-14 2024-03-19 上海华羿汽车系统集成有限公司 一种柱塞装置及内燃机
CN109695566A (zh) * 2019-01-18 2019-04-30 郑国璋 一种柱塞泵的密封润滑结构

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5749717A (en) * 1995-09-12 1998-05-12 Deisel Technology Company Electromagnetic fuel pump for a common rail fuel injection system
JPH1122594A (ja) * 1997-06-30 1999-01-26 Unisia Jecs Corp 燃料噴射装置の燃料加圧用ポンプ
CN103443440A (zh) * 2011-01-31 2013-12-11 大陆汽车有限公司 用于高压泵的泵单元
CN104251203A (zh) * 2013-06-26 2014-12-31 现代自动车株式会社 用于通用油路系统的高压泵的润滑装置
CN105587452A (zh) * 2016-02-05 2016-05-18 成都威特电喷有限责任公司 双通道低压油内循环油路电控单体泵
CN106523228A (zh) * 2016-12-31 2017-03-22 南岳电控（衡阳）工业技术股份有限公司 一种低功率柴油发电机燃油喷射电控单体泵
CN108533430A (zh) * 2018-05-07 2018-09-14 梁跃中 一种柴油机超高压燃油泵结构
CN109209713A (zh) * 2018-11-14 2019-01-15 上海华羿汽车系统集成有限公司 一种柱塞装置及内燃机

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB696993A (en) * 1950-12-05 1953-09-09 Motorpal A fuel-injection pump for internal-combustion engines
CN2528948Y (zh) * 2002-04-08 2003-01-01 江苏常发集团 单体柱塞式喷油泵及安装该喷油泵的柴油机
CN102287367B (zh) * 2011-07-30 2014-05-28 郑国璋 一种超高压柱塞泵柱塞的密封润滑结构
CN204677346U (zh) * 2015-04-30 2015-09-30 哈尔滨工程大学 常闭型机电复合式高压油泵
JP6406195B2 (ja) * 2015-09-18 2018-10-17 株式会社デンソー ポンプ
CN108412652B (zh) * 2018-05-07 2024-01-16 梁跃中 一种柴油机多种燃料喷油泵结构
CN209067393U (zh) * 2018-11-14 2019-07-05 上海华羿汽车系统集成有限公司 一种柱塞装置及内燃机

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5749717A (en) * 1995-09-12 1998-05-12 Deisel Technology Company Electromagnetic fuel pump for a common rail fuel injection system
JPH1122594A (ja) * 1997-06-30 1999-01-26 Unisia Jecs Corp 燃料噴射装置の燃料加圧用ポンプ
CN103443440A (zh) * 2011-01-31 2013-12-11 大陆汽车有限公司 用于高压泵的泵单元
CN104251203A (zh) * 2013-06-26 2014-12-31 现代自动车株式会社 用于通用油路系统的高压泵的润滑装置
CN105587452A (zh) * 2016-02-05 2016-05-18 成都威特电喷有限责任公司 双通道低压油内循环油路电控单体泵
CN106523228A (zh) * 2016-12-31 2017-03-22 南岳电控（衡阳）工业技术股份有限公司 一种低功率柴油发电机燃油喷射电控单体泵
CN108533430A (zh) * 2018-05-07 2018-09-14 梁跃中 一种柴油机超高压燃油泵结构
CN109209713A (zh) * 2018-11-14 2019-01-15 上海华羿汽车系统集成有限公司 一种柱塞装置及内燃机

Also Published As

Publication number Publication date
CN109209713A (zh) 2019-01-15
CN109209713B (zh) 2024-03-19

Similar Documents

Publication Publication Date Title
JP4215000B2 (ja) 高圧ポンプ
US5567134A (en) High-pressure fuel-feed pump
US10941741B2 (en) High-pressure fuel supply pump
WO2020098180A1 (zh) 柱塞装置及内燃机
CN108412652B (zh) 一种柴油机多种燃料喷油泵结构
JP4825842B2 (ja) 燃料ポンプ
CN110748446A (zh) 一种共轨高压进出油阀组件及共轨高压供油泵
WO2020098179A1 (zh) 柱塞喷油器及内燃机
CN102287367B (zh) 一种超高压柱塞泵柱塞的密封润滑结构
CN105673282A (zh) 压力平衡阀式共轨喷油器
CN209067393U (zh) 一种柱塞装置及内燃机
CN106523228B (zh) 一种低功率柴油发电机燃油喷射电控单体泵
CN103644061B (zh) 一种自卸压无回油喷油器及自卸压无回油喷油器的改装方法
CN108533430A (zh) 一种柴油机超高压燃油泵结构
CN209067392U (zh) 一种柱塞喷油器及内燃机
CN208184873U (zh) 一种柴油机超高压燃油泵结构
CN205605345U (zh) 压力平衡阀式共轨喷油器
CN209687638U (zh) 一种用于高压共轨燃油喷射系统的多缸直列式喷油泵
CN208184874U (zh) 一种柴油机多种燃料喷油泵结构
CN208441951U (zh) 一种柴油机多种燃料喷油器结构
CN206487601U (zh) 高压油泵及燃油系统
JP2884560B2 (ja) 燃料噴射装置
JPS6233983Y2 (zh)
CN212003401U (zh) 一种双缸喷油泵
CN104153840B (zh) 电控气缸润滑装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19884205

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19884205

Country of ref document: EP

Kind code of ref document: A1