WO2021189812A1 - 一种外置式燃油泵及用于燃油泵的阀座 - Google Patents

一种外置式燃油泵及用于燃油泵的阀座 Download PDF

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Publication number
WO2021189812A1
WO2021189812A1 PCT/CN2020/120292 CN2020120292W WO2021189812A1 WO 2021189812 A1 WO2021189812 A1 WO 2021189812A1 CN 2020120292 W CN2020120292 W CN 2020120292W WO 2021189812 A1 WO2021189812 A1 WO 2021189812A1
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WO
WIPO (PCT)
Prior art keywords
valve seat
fuel pump
fuel
exhaust
oil
Prior art date
Application number
PCT/CN2020/120292
Other languages
English (en)
French (fr)
Inventor
蔡良宝
Original Assignee
浙江双良汽车零部件有限公司
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
Priority claimed from CN202020397630.8U external-priority patent/CN212054946U/zh
Priority claimed from CN202020398356.6U external-priority patent/CN211975240U/zh
Application filed by 浙江双良汽车零部件有限公司 filed Critical 浙江双良汽车零部件有限公司
Priority to US17/294,694 priority Critical patent/US11773836B2/en
Publication of WO2021189812A1 publication Critical patent/WO2021189812A1/zh

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Classifications

    • 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
    • F04B23/00—Pumping installations or systems
    • F04B23/02—Pumping installations or systems having reservoirs
    • F04B23/025—Pumping installations or systems having reservoirs the pump being located directly adjacent the reservoir
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
    • B01D45/08—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators
    • 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
    • F02M37/00—Apparatus 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
    • F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
    • F02M37/0023—Valves in the fuel supply and return system
    • 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
    • F02M37/00—Apparatus 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
    • F02M37/04—Feeding by means of driven pumps
    • 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
    • F02M37/00—Apparatus 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
    • F02M37/20—Apparatus 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 characterised by means for preventing vapour lock
    • 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
    • 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
    • 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
    • F04B53/22—Arrangements for enabling ready assembly or disassembly

Definitions

  • the invention relates to an external fuel pump placed outside a fuel tank and a valve seat used in the fuel pump.
  • Chinese patent CN107542599B discloses a fuel delivery system and method, and specifically discloses that the stopper is located in a cavity provided through the wall and below the exhaust pipe.
  • the stopper moves to be in a seat located at the entrance of the exhaust pipe to prevent and/or block any outflow of fuel, etc., through the exhaust pipe, for example into the environment.
  • the stopper can be moved back to the cavity to release the blockage of the exhaust pipe.
  • the lower cup is positioned in the lower part of the cavity to support the stopper. The lower cup provides the bottom plate of the cavity, which is used to rest the stopper.
  • the convex part of the bottom plate protrudes on the substantially flat plane of the bottom plate, so that the stopper cannot rest on the convex part of the bottom plate.
  • the lower cup may be located in three equally spaced legs that form three alternately spaced flow passage openings. Other numbers of legs and flow passages can be used, and they do not need to be spaced, depending on the implementation, for example.
  • the flow path allows steam to flow from the fuel pump module to the environment or other parts of the engine, for example, when the floating mechanism is open.
  • the fuel delivery system disclosed in the above patent does not specify whether a pressure regulating valve is required to adjust the flow rate of the output pipe.
  • the existing pressure regulating valve that can be set for the oil output of other oil pumps can only adjust the flow rate, and the existing pressure regulating valve is usually installed in the cavity through a fixing member.
  • the flow path of the anti-reversal part of the above-mentioned patent is formed by the gap between the leg and the lower cup.
  • the fuel passage set in this way directly communicates with the lower fuel cavity, and the vibration of the fuel pump during operation will cause fuel to splash into the cavity from the flow passage.
  • the overturn occurs, the fuel will flow into the cavity for the first time, and a small part of the fuel will still flow out through the exhaust pipe, causing waste and danger.
  • Chinese patent CN107542599A discloses a system and method for an anti-vibration flip valve, and specifically discloses that the stopper is located in a cavity provided through the wall and below the exhaust pipe.
  • the stopper moves to be in a seat located at the entrance of the exhaust pipe to prevent and/or block any outflow of fuel, etc., through the exhaust pipe, for example into the environment.
  • the stopper can be moved back to the cavity to release the blockage of the exhaust pipe.
  • the lower cup is positioned in the lower part of the cavity to support the stopper. The lower cup provides the bottom plate of the cavity, which is used to rest the stopper.
  • the convex part of the bottom plate protrudes on the substantially flat plane of the bottom plate, so that the stopper cannot rest on the convex part of the bottom plate.
  • the lower cup may be located in three equally spaced legs that form three alternately spaced flow passage openings. Other numbers of legs and flow passages can be used, and they do not need to be spaced, depending on the implementation, for example.
  • the flow path allows steam to flow from the fuel pump module to the environment or other parts of the engine, for example, when the floating mechanism is open.
  • a cavity is provided below the exhaust pipe, and a stopper is placed in the cavity, and the cavity embraces the lower cup under the wall through the wall, and embraces the legs of the lower cup and the lower cup.
  • a flow path is formed between them, which facilitates the in and out of fuel.
  • the exhaust pipe is blocked by the stopper to prevent fuel from flowing out of the exhaust pipe.
  • the defect in the above-mentioned patent is that the flow path is formed by the gap between the leg and the lower cup.
  • the fuel passage set in this way directly communicates with the lower oil cavity, and the vibration of the fuel pump during operation will cause fuel to splash into the cavity from the flow passage.
  • the overturn occurs, the fuel will flow into the cavity for the first time, and a small part of the fuel will still flow out through the exhaust pipe, causing waste and danger.
  • the first object of the present invention is to provide an external fuel pump and a multifunctional valve seat used in the fuel pump.
  • a valve seat for a fuel pump is characterized by comprising a valve seat body, one side of the valve seat body is provided with an installation chamber for installing the valve body, so The other side of the valve seat body is an oil barrier, and the oil barrier is connected to the outer wall of the installation chamber.
  • the valve seat set in the above manner can not only provide a valve seat for the fuel pump to install the valve body, especially the pressure regulating valve, but also block the exhaust port and the lower fuel chamber of the fuel pump through the oil barrier.
  • the fuel in the lower fuel chamber is splashed out from the exhaust port when it is shaken, or the fuel overflows from the exhaust port during the overturning process, which has a multi-functional performance.
  • an upward oil baffle is provided on the edge of the oil baffle plate, and a first oil discharge port is provided on the oil baffle plate.
  • the mounting chamber is a mounting groove with a cavity, and a second oil drain port is provided on one side of the mounting groove.
  • the upper wall of the second oil discharge port has a second partition that extends out of the installation groove.
  • the first oil discharge port and the second oil discharge port are arranged on opposite sides of the valve seat body.
  • the oil separator is fan-shaped, and its two sides gradually expand from the connection with the installation chamber to the outermost direction.
  • a first partition extending laterally from the valve seat body is provided at the lower part of the first oil exhaust port.
  • both the outermost side of the oil barrier and the outermost side of the installation chamber are provided with installation walls, and the installation walls are provided with elastic clamping members.
  • the second object of the present invention is to provide an external fuel pump that prevents fuel overflow at the exhaust port.
  • An external fuel pump includes the valve seat described above, and further includes a fuel chamber composed of a casing and a cover.
  • the valve seat body is located in the fuel chamber, and the oil barrier of the valve seat body is located The lower part of the exhaust port provided on the cover body, and an anti-reversal mechanism is provided between the exhaust port and the oil barrier.
  • the exhaust port is provided with an upwardly extending exhaust pipe
  • the anti-overturning mechanism includes a side wall extending downward from the lower end of the exhaust pipe, and the side wall and the oil barrier form an exhaust A cavity, the exhaust cavity communicates with the exhaust pipe, a movable stopper is arranged in the exhaust cavity, and an exhaust gap is provided on the side wall, the exhaust gap It communicates with the fuel chamber.
  • the notch is arranged on the side wall above the oil separator, which can prevent the splashed fuel caused by vibration from entering the exhaust cavity during normal use, and further avoids the exhaust air when turning over.
  • the stopper is a sphere, and the diameter of the sphere is larger than the inner diameter of the exhaust pipe.
  • the side wall has a tapered wall extending downwardly and outwardly from the lower opening of the exhaust pipe, the tapered wall opening has a downwardly extending cylindrical wall, and the gap is provided in The cylinder wall.
  • the notches extend from the top of the cylindrical wall to the bottom of the cylindrical wall, and the notches are several arranged along the circumferential direction of the cylindrical wall.
  • valve seat body is installed on the inner wall of the cover or the housing through an elastic clip, and a pressure regulating valve for the fuel output end is installed in the installation chamber of the valve seat body
  • a matching gasket and a sealing ring are arranged between the lower part of the pressure regulating valve and the installation groove, and a matching gasket and a sealing ring are arranged between the upper part of the pressure regulating valve and the cover.
  • the valve seat applied to an external fuel pump provided by the present invention can prevent splashed fuel from entering the exhaust port and overflowing from the exhaust pipe when the fuel pump shakes. It can avoid that when the fuel pump is turned over, the fuel enters the exhaust pipe and flows out. It can prevent the fuel overflowing from the mounting seat of the pressure regulating valve from overflowing through the exhaust port.
  • the valve seat of the embodiment in this city integrates multiple functions, and is easy to install and save space. Reduce the number of parts and further save costs.
  • the external fuel pump provided by the present invention can prevent the fuel in the oil cavity from being discharged to the external space through the exhaust pipe when the fuel in the oil cavity is turned over or toppled during the application process. It can also prevent fuel splashed due to vibration from entering the exhaust cavity during normal use, which not only avoids pollution to the external environment, but also improves safety performance. The safety performance of the engine is ensured, and the external environment is prevented from being polluted.
  • Figure 1 is an axonometric view of the external fuel pump of the present invention
  • Figure 2 is a front view of the external fuel pump of the present invention
  • Figure 3 is a cross-sectional view of Figure 2 A-A;
  • Figure 4 is an enlarged view B of Figure 3;
  • Figure 5 is a right side view of Figure 2;
  • Figure 6 is a C-C cross-sectional view of Figure 5;
  • Figure 7 is a structural diagram of the cover body of the external fuel pump of the present invention.
  • Figure 8 is the first structural diagram of the valve seat of the external fuel pump of the present invention.
  • Figure 9 is the second structural diagram of the valve seat of the external fuel pump of the present invention.
  • Embodiment will provide an external fuel pump and a valve seat used in the external fuel pump.
  • the external fuel pump is generally arranged between the fuel tank and the engine, and is used to pressurize the fuel in the fuel tank and pump it into the engine.
  • the engine is a small general-purpose internal combustion engine that can be applied to various occasions, such as other small vehicles for various purposes such as lawn mowers and snow sweepers.
  • the external fuel pump usually includes a housing 1 and a cover 2.
  • the housing and the cover match to form a fuel chamber 3.
  • the cover is provided with a fuel input pipe 4 for connecting with a fuel tank.
  • the fuel is piped into the fuel chamber.
  • a fuel output pipe 5 is also provided on the cover body, and the fuel output pipe is connected to the engine through a pipe for pressurizing the fuel to be delivered to the engine.
  • a pressure regulating valve 7 is installed in the fuel chamber.
  • the pressure regulating valve is fixed in the fuel chamber through a valve seat 8 and acts on the fuel output pipe to adjust the flow rate of the fuel output pipe.
  • an exhaust pipe 6 extending vertically upward is provided on the cover body, and the exhaust pipe communicates with the fuel chamber and is used to remove the gas generated by evaporation of the fuel in the fuel chamber.
  • the fuel vapor in the exhaust pipe is introduced into the intake system of the engine.
  • the exhaust pipe is vertically upward, and fuel cannot be discharged to the outside through the exhaust pipe.
  • the fuel pump shakes severely it will cause the fuel in the fuel cavity to splash into the exhaust pipe, causing the fuel to overflow from the exhaust pipe.
  • the fuel pump is dumped or turned over, the fuel is easily discharged to the outside through the exhaust pipe, which will pollute the external environment or cause other hazards such as combustion.
  • a valve seat 8 is installed in the fuel chamber.
  • One side of the valve seat body of the valve seat is provided with an installation chamber 801 for installing the valve body.
  • One side is an oil barrier 802, which is connected to the outer wall of the installation chamber.
  • the installation chamber is used to fix the pressure regulating valve 7 so that it can stably act on the fuel output pipe, and the oil separator is located under the exhaust port of the exhaust pipe, which can avoid shaking. Fuel splashed into the exhaust pipe.
  • an anti-reversal mechanism is also provided between the exhaust port of the exhaust pipe and the oil separator.
  • the anti-reversal mechanism can make the fuel pump tilt or turn over even when the fuel pump is tilted or turned over. It can prevent the fuel from flowing out of the exhaust port.
  • the anti-reversal mechanism includes a bottom plate and a side wall 9 located below the exhaust port, and the oil barrier is a bottom plate.
  • the side wall and the bottom plate form an exhaust cavity 10, the exhaust cavity is communicated with the exhaust pipe, a movable stopper is arranged in the cavity, and the side wall is An exhaust notch 11 is provided, and the exhaust notch communicates with the chamber.
  • the stopper as a component that can block the opening of the exhaust pipe when it is turned or tilted, can be set as a sphere with a diameter larger than the inner diameter of the exhaust pipe.
  • the stopper is a steel ball 12. When overturning occurs, the steel ball will block the exhaust port of the exhaust pipe under the action of gravity.
  • the side wall in this embodiment is a section of revolving wall that extends downward from the lower opening of the exhaust pipe and is close to the bottom plate.
  • the side wall has two sections, one section is a tapered wall 901 extending downward and downward from the lower opening of the exhaust pipe, and the other section is a cylinder extending downward from the opening of the tapered wall. ⁇ 902.
  • the tapered wall may be arranged outside the housing, and the cylindrical wall may be arranged inside the housing.
  • the notch is provided on the cylindrical wall.
  • the size of the gap can be set according to actual conditions. One principle is that the steel ball cannot be allowed to fall off from the gap, and the steel ball cannot be allowed to be stuck in the gap.
  • the notch extends from the top of the cylindrical wall, that is, the inner top wall of the cover body, to the bottom of the cylindrical wall, and the notches are multiple arranged along the circumference of the cylindrical wall. It can be selected but not limited to one, two, three, four or five, etc.
  • the side wall extending downward to be close to the bottom plate may mean that the bottom surface of the side wall has been attached to the bottom plate, or it may mean that the bottom surface of the side wall is close to the bottom plate. But for fit.
  • the valve seat of the pressure regulating valve is used as the bottom plate of the anti-overturning mechanism, which realizes the multi-functional use of the valve seat, and can also save the space in the fuel chamber and the number of parts.
  • the pressure regulating valve seat includes an integrated mounting seat and an oil barrier.
  • the outermost side of the oil barrier and the outermost side of the installation chamber are both provided with a mounting wall 803, and the mounting wall is provided with Elastic card 804.
  • the elastic clip is a common clip.
  • the upper part of the elastic clip is connected to the installation wall, the lower part is away from the installation wall, and the outer wall of the lower part of the clip is provided with a clip 805 protruding outward.
  • the card has flexibility.
  • lugs 201 on opposite sides of the cover body are respectively provided with downwardly protruding lugs 201, on the lugs are provided with mounting openings 202 corresponding to the card portion, by connecting the card The part is snapped into the installation opening to realize the integral installation of the valve seat and the cover body.
  • upwardly facing oil baffle plates 806 are provided on the edges of both sides of the oil baffle plate, and a first oil discharge port 807 is provided on one of the oil baffle plates.
  • the setting of the oil separator can prevent splashed fuel from entering the exhaust port.
  • the function of setting the oil drain port is that when the overturn occurs, the fuel poured into the oil separator can be drained from the first oil drain port when the fuel pump returns to the normal position.
  • the oil separator is fan-shaped, and its two sides gradually expand from the connection with the installation chamber to the outermost direction.
  • a first partition 808 extending laterally from the valve seat body is provided at the lower part of the first oil discharge port.
  • the function of the first partition is also to prevent splashing.
  • the first baffle is arranged at the lower part of the first oil discharge port, it does not affect the oil discharge effect of the first oil discharge port, because the plate surface of the first baffle is lower than the plate surface of the oil barrier plate.
  • the first partition can be set in a downwardly inclined state. It is convenient for fuel to be discharged into the oil cavity.
  • the installation chamber in this embodiment is used as a component for installing the pressure regulating valve. It is an installation groove 809 with a cavity, and the shape of the installation groove is set according to the shape of the pressure regulating valve, and is generally cylindrical. And a second oil discharge port 810 is provided on one side of the installation groove. The upper wall of the second oil discharge port has a second partition 811 protruding out of the installation groove. Wherein, the first oil discharge port and the second oil discharge port are arranged on opposite sides of the valve seat body.
  • the second oil discharge port in this embodiment is opposite to the valve core 13 installed in the fuel chamber of the fuel pump, and is used to discharge the fuel in the installation chamber.
  • the function of the second baffle is to prevent the fuel in the installation room from entering upwards onto the oil barrier and further entering the exhaust port.
  • annular mounting portion 812 is provided on the upper ring wall of the mounting groove of the mounting chamber, and a gasket 14 and a sealing ring 15 that cooperate with the outer wall of the pressure regulating valve are mounted in the annular mounting portion.
  • the cover 2 is provided with a pressure regulating valve mounting seat 203 communicating with the fuel output pipe.
  • the pressure regulating valve mounting seat 203 is used for mounting a pressure regulating valve.
  • the upper outer wall of the pressure regulating valve is connected to the pressure regulating valve.
  • a gasket 14 and a sealing ring 15 are also arranged between the valve mounting seats 203, in order to prevent the fuel in the fuel output pipe from overflowing downward and entering the exhaust port and overflowing from the exhaust pipe.
  • an annular limiting protrusion 701 is provided on the outer wall of the middle portion of the pressure regulating valve 7, and the function of the annular limiting protrusion is to limit the gasket and the sealing ring.
  • the fuel in the fuel tank is pressurized and then input into the fuel chamber by the fuel input pipe through the pipeline, and output by the fuel output pipe after being pressurized by the pump in the fuel chamber, and the output of the fuel output pipe can be adjusted by the pressure regulating valve
  • the flow rate is large, and the boil-off gas generated in the fuel chamber can be eliminated through the exhaust pipe.
  • the anti-turnover mechanism can prevent the fuel from overflowing from the exhaust pipe when the terminal application machinery is turned over or shifted or violently shakes.
  • a floating mechanism 16 may be provided in the fuel chamber. The floating mechanism acts on the fuel input end. When the fuel in the chamber reaches a certain height, the floating mechanism 16 floats to block the fuel input end and avoid refueling. Enter the fuel chamber.
  • a terminal 17 of the pump is provided on the housing for connecting to a power source for starting.
  • the outer wall of the housing 1 in this embodiment is provided with fixing holes 101 on the left and right sides, so as to install the external fuel pump on the engine or the frame.
  • valve seat applied to the external fuel pump provided in this embodiment can prevent splashed fuel from entering the exhaust port and overflowing from the exhaust pipe when the fuel pump shakes. It can avoid that when the fuel pump is turned over, the fuel enters the exhaust pipe and flows out. It can prevent the fuel overflowing from the mounting seat of the pressure regulating valve from overflowing through the exhaust port.
  • the valve seat of this embodiment integrates multiple functions, and is easy to install and save space. Reduce the number of parts and further save costs.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Safety Valves (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

一种外置式燃油泵及用于燃油泵的阀座（8），其中所述阀座（8）包括阀座本体，所述阀座本体的一侧设置有用于安装阀体的安装室（801），所述阀座本体的另一侧为隔油板（802），所述隔油板（802）与所述安装室（801）的外壁连接。阀座（8）集多种功能为一体，并且安装方便，节省空间；减少了零部件数量，进一步节省了成本。

Description

一种外置式燃油泵及用于燃油泵的阀座 技术领域
[根据细则26改正25.11.2020]　
本发明涉及一种置于油箱外的外置式燃油泵，以及用于燃油泵中的阀座。
背景技术
在中国专利CN107542599B中公开了一种燃料输送的系统和方法，并具体公开了：止挡件位于通过壁提供并且在排气管下方的空腔中。在车辆/发动机翻转的情况下，止挡件移动以处于位于排气管的入口处的座中一阻止和/或封堵燃料等的任何流出，通过排气管，例如进入环境。当发动机回到正常的直立位置时，止挡件可以移回到空腔以解除对排气管的阻塞。在一些实施例中，下杯定位在空腔的下部以支承止挡件。下杯提供空腔的底板，用于止挡件的搁置。底板的凸部在底板的大致平坦的平面上突出，使得止挡件不能搁置在底板的凸部上。在一些实施例中，下杯可以位于形成三个交替间隔的流动通路开口的三个等间隔的腿部内。可以使用其他数量的腿部和流动通路，并且他们不需要间隔，例如取决于实施方式。流动通路允许蒸汽从燃料泵模块流向环境或发动机的其他部分，例如，当浮动机构打开时。
上述专利中的公开的燃料输送系统，未说明是否需要设置调压阀对输出管道的流量进行调节。现有的其他油泵出油可设置的调压阀也仅能够对流量进行调节，并且，现有的调压阀通常通过一固定件安装在腔体内。另外，上述专利的防翻转部分其流动通路是通过腿部与下杯之间的空隙形成的。这样设置的燃油通路直接与下部的油腔相通，在运行过程中燃油泵的震动将会导致燃油由流 动通路中飞溅入空腔中。并且当发生翻转时燃油也会第一时间流入到空腔中，依然会有小部分燃油通过排气管流出，造成浪费和危险。
另外，在中国专利CN107542599A中公开了一种用于抗振翻转阀的系统和方法，并具体公开了：止挡件位于通过壁提供并且在排气管下方的空腔中。在车辆/发动机翻转的情况下，止挡件移动以处于位于排气管的入口处的座中一阻止和/或封堵燃料等的任何流出，通过排气管，例如进入环境。当发动机回到正常的直立位置时，止挡件可以移回到空腔以解除对排气管的阻塞。在一些实施例中，下杯定位在空腔的下部以支承止挡件。下杯提供空腔的底板，用于止挡件的搁置。底板的凸部在底板的大致平坦的平面上突出，使得止挡件不能搁置在底板的凸部上。在一些实施例中，下杯可以位于形成三个交替间隔的流动通路开口的三个等间隔的腿部内。可以使用其他数量的腿部和流动通路，并且他们不需要间隔，例如取决于实施方式。流动通路允许蒸汽从燃料泵模块流向环境或发动机的其他部分，例如，当浮动机构打开时。
上述专利中的翻转阀，排气管下方设置一个空腔，空腔内放置止挡件，并且所述空腔通过壁抱住壁下方的下杯，抱住下杯的腿部与下杯之间形成流动通路，可方便燃油的进出。翻转时通过止挡件对排气管的阻塞以避免燃油有排气管中流出。但是上述专利中存在的缺陷是：其流动通路是通过腿部与下杯之间的空隙形成的。这样设置的燃油通路直接与下部的油腔相通，在运行过程中燃油泵的震动将会导致燃油由流动通路中飞溅入空腔中。并且当发生翻转时燃油也会第一时间流入到空腔中，依然会有小部分燃油通过排气管流出，造成浪费和危险。
发明内容
本发明的第一目的在于提供一种外置式燃油泵和用于燃油泵内的多功能阀座。
为了达到上述目的，本发明是这样实现的：一种用于燃油泵的阀座，其特征在于：包括阀座本体，所述阀座本体的一侧设置有用于安装阀体的安装室，所述阀座本体的另一侧为隔油板，所述隔油板与所述安装室的外壁连接。采用上述方式设置的阀座，不但能够为燃油泵提供一个用于安装阀体尤其是调压阀的阀座，同时还能够通过隔油板阻隔排气口与燃油泵的下部燃油腔室，避免下部燃油腔室内的燃油在震动时由排气口飞溅而出，或者翻转的过程中使得燃油由排气口溢出，具有多功能性能。
为进一步避免燃油由排气口溢出，所述隔油板边缘设置有朝上的挡油板，所述挡油板上设置有第一排油口。
为进一步避免燃油由安装座溢出，所述安装室为具有腔室的安装槽，所述安装槽的一侧设置有第二排油口。
为进一步避免燃油由安装座溢出并进一步由排气口溢出，所述第二排油口的上壁具有朝安装槽外伸出的第二隔板。
优选的，所述第一排油口与第二排油口设置在所述阀座本体的相对侧。
优选的，所述隔油板为扇形，其两侧从与所述安装室的连接处向最外侧的方向逐渐扩张。
为进一步避免飞溅的燃油由排气口溢出，在所述第一排油口下部设置有由阀座本体横向伸出的第一隔板。
为进一步实现安装，所述隔油板的最外侧与所述安装室的最外侧均设置有安装壁，所述安装壁上设置有弹性卡件。
本发明的第二目的在于提供一种防排气口燃油溢出的外置式燃油泵。
一种外置式燃油泵，包括上述所述阀座，还包括由壳体和盖体构成的燃油腔室，所述阀座本体位于所述燃料腔室内，所述阀座本体的隔油板位于所述盖体上设置的排气口的下部，且在所述排气口及隔油板之间设置有防翻转机构。其中，所述排气口设有向上伸出的排气管，所述防翻转机构包括由所述排气管下端向下延伸侧壁，所述侧壁与所述隔油板形成了排气空腔，所述排气空腔与所述排气管相通，所述排气空腔内设置有可活动的止挡件，且所述侧壁上设置有排气缺口，所述排气缺口与所述燃料腔室相通。通过上述设置，将缺口设置在隔油板之上的侧壁上，可避免在正常使用过程中因震动导致飞溅的燃油进入到排气空腔之中，也进一步避免了在翻转时排气空腔中存在燃油由排气管溢出的问题，防止了燃油由排气管泄漏且提高了燃油输送系统的使用安全性能。
优选的，所述止挡件为球体，所述球体直径大于所述排气管内径。
优选的，所述侧壁具有由所述排气管的下部开口处向下且向外延伸的锥形壁，所述锥形壁开口处具有向下延伸的圆筒壁，所述缺口设置在所述圆筒壁上。
为进一步提高排气效果，所述缺口由所述圆筒壁顶部延伸到圆筒壁底部，且所述缺口为沿所述圆筒壁周向设置的几个。
为进一步避免燃油飞溅入排气空腔，所述阀座本体通过弹性卡件安装在所述盖体或壳体内壁，在所述阀座本体的安装室中安装有用于燃料输出端调压阀，所述调压阀下部与安装槽之间设置有相互配合的垫圈与密封圈，所述调压阀上部与盖体之间设置有相互配合的垫圈和密封圈。
有益效果：
本发明提供的应用于外置式燃油泵的阀座，能够避免燃油泵在发生抖动时， 飞溅的燃油进入到排气口并从排气管溢出。能够避免当燃油泵发生翻转时，燃油进入到排气管中并流出。能够避免由调压阀的安装座溢出的燃油由排气口溢出。本市实施例的阀座集多种功能为一体，并且安装方便，节省空间。减少了零部件数量，进一步节省了成本。
而本发明提供的外置式燃油泵，应用过程中能够能够避免发生翻转或倾倒时，油腔内的燃油通过排气管排出到外部空间。还可避免在正常使用过程中因震动导致飞溅的燃油进入到排气空腔之中，既避免了污染外部环境也提高了安全性能。保证了发动机的应用安全能，更避免了外部环境受到污染。
附图说明
图1为本发明外置式燃油泵的轴测图；
图2为本发明外置式燃油泵的主视图；
图3为图2的A-A剖视图；
图4为图3放大视图B；
图5为图2的右视图；
图6为图5的C-C剖视图；
图7为本发明外置式燃油泵的盖体结构图；
图8为本发明外置式燃油泵的阀座的结构图一；
[根据细则26改正25.11.2020]　
图9为本发明外置式燃油泵的阀座的结构图二。
标号说明：1壳体，101固定孔，2盖体，201支耳，202安装开口，203调压阀安装座，3燃料腔室，4燃料输入管，5燃料输出管，6排气管，7调压阀，701环形限位凸起，8阀座，801安装室，802隔油板，803安装壁，804弹性卡件，805卡部，806挡油板，807第一排油口，808第一隔板，809安装槽，810 第二排油口，811第二隔板，812环形安装部，9侧壁，901锥形壁，902圆筒壁，10排气空腔，11排气缺口，12钢球，13阀芯，14垫圈，15密封圈，16浮动机构，17接线端。
具体实施方式
下面结合附图对本发明的具体实施方式作进一步详细的说明，但本发明并不局限于这些实施方式，任何在本实施例基本精神上的改进或代替，仍属于本发明权利要求所要求保护的范围。
实施例：本实施例将提供一种外置式燃油泵，以及用于该外置式燃油泵内的阀座。所述外置式燃油泵一般来说是设置在燃油箱与发动机之间，用于将燃油箱中燃油加压后泵入到发动机中。而所述发动机是可以应用于各种场合的小型通用内燃机，如除草机、扫雪机等多种用途的其他小型车辆。
所述外置式燃油泵通常包括一个壳体1与盖体2，壳体与盖体相匹配形成燃料腔室3，所述盖体上设置有燃料输入管4，用于与油箱连接，油箱内燃料通过管道输送到燃料腔室之中。所述盖体上还设置有燃料输出管5，所述燃料输出管通过管道与发动机连接用于将燃料加压后输送到发动机之中。而且在所述燃料腔室内安装有调压阀7，所述调压阀通过阀座8被固定在燃料腔室内，并作用于所述燃料输出管，调节燃料输出管的流量。
另外，在所述盖体上还设置有竖直向上伸出的排气管6，所述排气管与所述燃料腔室相通，用于将燃料腔室中的燃料因蒸发产生的气体排除到外部环境中，或者通过附件的连接器，将排气管中的燃料蒸汽导入到发动机的进气系统之中。正常使用情况下，排气管竖直朝上，燃料无法通过排气管排出到外部。但是当燃油泵发生严重抖动时，将会导致燃油腔体内的燃油飞溅入排气管内，使得燃 油由排气管溢出。或者燃料泵发生倾倒或翻转的情况下，燃料极易通过排气管排出到外部，这样一来，将会对外部环境造成污染，或者发生其他危险如燃烧等情况。
而本实施例中的外置式燃油泵，在燃油腔室内安装有阀座8，所述阀座的阀座本体的一侧设置有用于安装阀体的安装室801，所述阀座本体的另一侧为隔油板802，所述隔油板与所述安装室的外壁连接。其中，所述安装室用于固定所述调压阀7，使其能够稳定地作用于燃料输出管，而所述隔油板则位于所述排气管的排气口下方，能够避免抖动中燃油飞溅入排气管。
进一步地，本实施例中在所述排气管的排气口与所述隔油板之间还设置有防翻转机构，所述防翻转机构可使得即使在燃油泵发生倾斜或翻转时，也能够避免燃油由排气口流出。
具体而言，所述防翻转机构包括位于所述排气口下方的底板和侧壁9，所述隔油板则为底板。所述侧壁与所述底板形成了排气空腔10，所述排气空腔与所述排气管相通，所述空腔内设置有可活动的止挡件，且所述侧壁上设置有排气缺口11，所述排气缺口与所述腔室相通。其中，所述止挡件作为翻转或倾倒时能够堵塞排气管开口的部件，可设置为直径大于排气管内径的球体。本实施例中，所述止挡件为钢球12。当发生翻转时，所述钢球会在重力的作用下堵塞住排气管的排气口。避免燃油由所述排气管溢出。本实施例中的所述侧壁为由所述排气管的下部开口处朝下延伸贴近所述底板的一段回转壁。其中所述侧壁具有两段，一段是由所述排气管的下部开口出向下且下外延伸的锥形壁901，另一段是由所述锥形壁开口处具有向下延伸的圆筒壁902。从制造角度考虑，可将所述锥形壁设置在壳体外，所述圆筒壁设置在壳体内。进而将所述缺口设置在所 述圆筒壁上。而所述缺口可设置的大小可更具实际情况而定，一个原则是不能允许所述钢球由所述缺口中脱落，且不能允许所述钢球卡在所述缺口之中。本实施例中，所述缺口由所述圆筒壁顶部，也就是盖体内侧顶壁延伸到圆筒壁底部，且所述缺口为沿所述圆筒壁周向设置的多个。可选择但不限于一个、两个、三个、四个或五个等。
作为本实施例中的另一实施方式，所述侧壁向下延伸贴近所述底板可指所述侧壁底面已经与所述底板贴合，也可指所述侧壁底面与所述底板接近但为贴合。
这样一来，即能够避免燃油输送系统正常使用过程中因震动导致飞溅的燃油进入到排气空腔之中，也进一步避免了在翻转时排气空腔中存在燃油由排气管溢出的问题，防止了燃油由排气管泄漏且提高了燃油输送系统的使用安全性能。而本实施例中将调压阀的阀座用作防翻转机构的底板，即实现了阀座的多功能用途，并且还能够节省燃油腔室内空间和零件数量。
具体而言，所述调压阀座包括一体的安装座和隔油板，所述隔油板的最外侧与所述安装室的最外侧均设置有安装壁803，所述安装壁上设置有弹性卡件804。所述弹性卡件为常见的卡件。本实施例中，所述弹性卡件的上部与安装壁相连，下部远离安装壁，且在所述卡件的下部外壁上设置有向外突出的卡部805。如此一来，卡件便具有了弹性。而通过在盖体或者壳体内壁设置与所述卡部相对的凹部，可将所述阀座卡设安装在所述壳体之内进而实现阀座的固定。本实施例中，在所述盖体的相对两侧分别设置有向下伸出的支耳201，在所述支耳上设置有与所述卡部相对应安装开口202，通过将所述卡部卡入安装开口中实现阀座与盖体的一体安装。
另外，本实施例中，在所述隔油板两侧的边缘设置有朝上的挡油板806，在其中一侧挡油板上设置有第一排油口807。通过隔油板的设置能够更加避免飞溅的燃油进入到排气口中。而且设置排油口的作用为，当发生翻转时，倒入到隔油板以上的燃油在燃油泵恢复正常位置时，能够从第一排油口处排出。
作为本实施例中的另一实施方式，所述隔油板为扇形，其两侧从与所述安装室的连接处向最外侧的方向逐渐扩张。且在所述第一排油口下部设置有由阀座本体横向伸出的第一隔板808。第一隔板的作用同样是用于防飞溅。虽然在第一排油口下部设置了第一隔板，但是并不影响第一排油口的排油效果，因为第一隔板的板面低于所述隔油板的板面。或者进一步的可将所述第一隔板设置为向下倾斜的状态。便于燃油向油腔内排入。
而本实施例中的安装室，作为用于安装调压阀的部件。其为具有腔室的安装槽809，所述安装槽的形状根据调压阀的形状设置，通常情况下为圆柱形。且在所述安装槽的一侧设置有第二排油口810。所述第二排油口的上壁具有向安装槽外伸出的第二隔板811。其中，所述第一排油口与第二排油口设置在所述阀座本体的相对侧。
本实施例中的第二排油口与所述燃油泵的燃油腔室内安装的阀芯13相对，用于排出安装室内的燃油。所述第二挡板的作用则是为了避免安装室内的燃油向上进入到隔油板之上，并进一步进入到排气口中。
并且，所述安装室的安装槽上环壁设置有环形安装部812，所述环形安装部内安装有与调压阀外壁配合的垫圈14与密封圈15。这样一来，能够进一步避免安装室内的燃油通过与调压阀之间的间隙进入到隔油板之上，进而进入到排气口中并从排气管溢出。同样的，所述盖体2上设置有与燃油输出管相通的调压 阀安装203座，所述调压阀安装座203用于安装调压阀，所述调压阀的上部外壁与调压阀安装座203之间同样也设置了垫圈14和密封圈15，目的是为了避免燃油输出管内的燃油向下溢出并进入到排气口值周并从排气管溢出。且在所述调压阀7的中部外壁设置有环形限位凸起701，所述环形限位凸起的作用是为了对垫圈和密封圈进行限位。
在工作时，油箱内的燃油加压后通过管道由燃料输入管输入到燃料腔室内，并通过燃料腔室内的泵加压后由燃料输出管输出，通过调压阀可调节燃料输出管的输出流量大小，而通过排气管可排除在燃料腔室中产生的蒸发气体。通过防翻转机构可避免终端应用机械在发生翻转或偏移或剧烈抖动时燃料由排气管中溢出。进一步的，还可在所述燃料腔室内设置有浮动机构16，所述浮动机构作用于燃料输入端，当腔室内的燃油到达一定高度后，浮动机构16上浮以堵塞燃料输入端，避免燃料再进入燃料腔室中。另外，在所述壳体上设置有泵的接线端17，用于与电源连接启动。
另外，本实施例中的壳体1外壁左右分别设置有固定孔101，以便将所述外置式燃料泵安装到发动机上或者车架上。
综上所述，本实施例中的提供的应用于外置式燃油泵的阀座，能够避免燃油泵在发生抖动时，飞溅的燃油进入到排气口并从排气管溢出。能够避免当燃油泵发生翻转时，燃油进入到排气管中并流出。能够避免由调压阀的安装座溢出的燃油由排气口溢出。本实施例的阀座集多种功能为一体，并且安装方便，节省空间。减少了零部件数量，进一步节省了成本。

Claims (14)

  1. 一种用于燃油泵的阀座，其特征在于：包括阀座本体，所述阀座本体的一侧设置有用于安装阀体的安装室，所述阀座本体的另一侧为隔油板，所述隔油板与所述安装室的外壁连接。
  2. 如权利要求1所述的用于燃油泵的阀座，其特征在于：所述隔油板边缘设置有朝上的挡油板，所述挡油板上设置有第一排油口。
  3. 如权利要求1或2所述的用于燃油泵的阀座，其特征在于：所述安装室为具有腔室的安装槽，所述安装槽的一侧设置有第二排油口。
  4. 如权利要求3所述的用于燃油泵的阀座，其特征在于：所述第二排油口的上壁具有朝安装槽外伸出的第二隔板。
  5. 如权利要求3或4所述的用于燃油泵的阀座，其特征在于：所述第一排油口与第二排油口设置在所述阀座本体的相对侧。
  6. 如上述任一项权利要求所述的用于燃油泵的阀座，其特征在于：所述隔油板为扇形，其两侧从与所述安装室的连接处向最外侧的方向逐渐扩张。
  7. 如权利要求6所述的用于燃油泵的阀座，其特征在于：在所述第一排油口下部设置有由阀座本体横向伸出的第一隔板。
  8. 如上述任一项权利要求所述的用于燃油泵的阀座，其特征在于：所述隔油板的最外侧与所述安装室的最外侧均设置有安装壁，所述安装壁上设置有弹性卡件。
  9. 一种外置式燃油泵，包括上述任一项权利要求所述阀座，其特征在于：包括由壳体和盖体构成的燃油腔室，所述阀座本体位于所述燃料腔室内，所述阀座本体的隔油板位于所述盖体上设置的排气口的下部，且在所述排气口及隔 油板之间设置有防翻转机构。
  10. 如权利要求9所述的外置式燃油泵，其特征在于：所述排气口设有向上伸出的排气管，所述防翻转机构包括由所述排气管下端向下延伸侧壁，所述侧壁与所述隔油板形成了排气空腔，所述排气空腔与所述排气管相通，所述排气空腔内设置有可活动的止挡件，且所述侧壁上设置有排气缺口，所述排气缺口与所述燃料腔室相通。
  11. 如权利要求10所述的外置式燃油泵，其特征在于：所述止挡件为球体，所述球体直径大于所述排气管内径。
  12. 如权利要求10或11所述的外置式燃油泵，其特征在于：所述侧壁具有由所述排气管的下部开口处向下且向外延伸的锥形壁，所述锥形壁开口处具有向下延伸的圆筒壁，所述缺口设置在所述圆筒壁上。
  13. 如权利要求12所述的外置式燃油泵，其特征在于：所述缺口由所述圆筒壁顶部延伸到圆筒壁底部，且所述缺口为沿所述圆筒壁周向设置的几个。
  14. 如权利要求9、10、11、12或13所述的外置式燃油泵，其特征在于：所述阀座本体通过弹性卡件安装在所述盖体或壳体内壁，在所述阀座本体的安装室中安装有用于燃料输出端调压阀，所述调压阀下部与安装槽之间设置有相互配合的垫圈与密封圈，所述调压阀上部与盖体之间设置有相互配合的垫圈和密封圈。
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