WO2023098178A1 - Low-carbon fuel injection device and engine - Google Patents

Low-carbon fuel injection device and engine Download PDF

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Publication number
WO2023098178A1
WO2023098178A1 PCT/CN2022/115368 CN2022115368W WO2023098178A1 WO 2023098178 A1 WO2023098178 A1 WO 2023098178A1 CN 2022115368 W CN2022115368 W CN 2022115368W WO 2023098178 A1 WO2023098178 A1 WO 2023098178A1
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WO
WIPO (PCT)
Prior art keywords
fuel
chamber
sleeve
low
pressure
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PCT/CN2022/115368
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French (fr)
Chinese (zh)
Inventor
杨丽
文李明
方良杰
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中船动力研究院有限公司
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Publication of WO2023098178A1 publication Critical patent/WO2023098178A1/en

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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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • 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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/04—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure using fluid, other than fuel, for injection-valve actuation
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • 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
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

Definitions

  • the present application relates to the technical field of engines, for example, to a low-carbon fuel injection device and an engine.
  • low-carbon or zero-carbon alternative fuels such as methanol and ammonia
  • low-carbon and zero-carbon fuels such as methanol and ammonia
  • methanol and ammonia have remarkable characteristics such as low flash point, low viscosity and strong corrosion.
  • the above characteristics lead to low-carbon and zero-carbon fuel injection systems need to solve a series of engineering problems such as sealing, lubrication, safe use, and leakage detection.
  • the application provides a low-carbon fuel injection device, which can solve the problems of sealing and lubrication and safe use of fuels with low flash point and low viscosity.
  • the application provides an engine.
  • the above-mentioned low-carbon fuel injection device it can solve the problem of sealing and lubrication of low-flash point and low-viscosity fuel and the problem of safe use. Efficient and reliable jetting needs.
  • a low-carbon fuel injection device including a housing, a solenoid valve, a seal, a sleeve, a valve rod, a stopper, a needle valve and an elastic member, and a accommodating cavity; the side wall of the housing is provided with a high-pressure fuel inlet, a medium-pressure hydraulic oil inlet and a low-pressure fuel outlet, and the high-pressure fuel inlet, the medium-pressure hydraulic oil inlet and the low-pressure fuel outlet are all connected to the The accommodating cavity is connected;
  • the seal, the sleeve, the valve stem, the stopper and the needle valve are sequentially arranged in the accommodating chamber and cooperate to form a hydraulic drive chamber, a fuel control chamber, a fuel collection chamber and an injection chamber,
  • the hydraulic drive chamber can communicate with the medium-pressure hydraulic oil inlet
  • the fuel control chamber can communicate with the high-pressure fuel inlet
  • the fuel collection chamber can communicate with the fuel control chamber
  • the fuel control chamber can communicate with the fuel control chamber.
  • the collection chamber is kept in communication with the low-pressure fuel outlet
  • the injection chamber is kept in communication with the high-pressure fuel inlet;
  • the solenoid valve is configured to open or close the communication between the medium-pressure hydraulic oil inlet and the hydraulic drive chamber;
  • the stopper is fixed to the end of the seal and is located in the sleeve, the valve stem is slidably passed through the sleeve, and is closed when the valve stem abuts against the stopper a communication between the fuel control chamber and the high-pressure fuel inlet, opening the communication between the fuel control chamber and the high-pressure fuel inlet when the valve stem is spaced apart from the stopper;
  • the sleeve cooperates with the inner wall of the accommodating chamber to form a communication channel for communicating with the fuel collection chamber and the fuel control chamber, and the sleeve can slide relative to the accommodating chamber to open or close the communication channel. aisle;
  • the needle valve cooperates with the elastic member to slide and cooperate with the valve rod, so as to open or close the communication between the injection chamber and the outlet of the accommodating chamber.
  • an engine including the above-mentioned low-carbon fuel injection device.
  • Fig. 1 is a schematic structural view of a low-carbon fuel injection device provided by an embodiment of the present application
  • Fig. 2 is a partial enlarged view of place A in Fig. 1;
  • Fig. 3 is a partial enlarged view of place B in Fig. 1;
  • Fig. 4 is a structural schematic diagram of the low-carbon fuel injection device provided by the embodiment of the present application for the first time entering hydraulic oil;
  • Fig. 5 is a structural schematic diagram of the low-carbon fuel injection device provided by the embodiment of the present application for the first time to inject fuel;
  • Fig. 6 is a schematic structural diagram of the low-carbon fuel injection device in the initial waiting injection state provided by the embodiment of the present application;
  • Fig. 7 is a schematic structural view of the low-carbon fuel injection device provided by the embodiment of the present application when the sleeve runs to the lower limit;
  • Fig. 8 is a schematic structural view of the low-carbon fuel injection device provided by the embodiment of the present application when the valve stem moves to the upper limit;
  • Fig. 9 is a schematic structural view of the needle valve running to the upper limit in the low-carbon fuel injection device provided by the embodiment of the present application.
  • Fig. 10 is a schematic diagram of the structure of the low-carbon fuel injection device provided by the embodiment of the present application when the sleeve runs to the upper limit.
  • valve stem 51, inlet; 52, first outlet; 53, second outlet;
  • Needle valve 71. First flow path; 72. Second flow path;
  • Nozzle assembly 101. Nozzle; 102. Nozzle connector.
  • a first feature being "on” or “under” a second feature may include direct contact between the first and second features, and may also include the first and second features Not in direct contact but through another characteristic contact between them.
  • “above”, “above” and “above” the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.
  • “Below”, “beneath” and “under” the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.
  • the low-carbon fuel injection device provided in this embodiment includes a housing 1, a solenoid valve 2, a seal 3, a sleeve 4, a valve stem 5, a stopper 6, a needle valve 7 and an elastic Item 8.
  • the low-carbon fuel injection device provided by this embodiment has a simple structure, a high degree of integration, flexible and adjustable fuel injection intervals, and a short response time, and can solve the problem of sealing and lubrication of low-flash point, low-viscosity fuels and safe use. To meet the needs of current and future marine high-power engines for safe, fast, efficient, high-flow and high-reliability injection using low-carbon and zero-carbon new fuels.
  • the housing 1 is provided with an accommodating chamber that runs through the housing 1; the side wall of the housing 1 is provided with a high-pressure fuel inlet 111, a medium-pressure hydraulic oil inlet 112, and a low-pressure fuel outlet 113.
  • the high-pressure fuel The inlet 111 , the medium-pressure hydraulic oil inlet 112 and the low-pressure fuel outlet 113 are all in communication with the accommodating cavity.
  • the housing 1 includes a first housing 11 and a second housing 12, the second housing 12 is detachably connected to the first housing 11, the high-pressure fuel inlet 111, the Both the medium-pressure hydraulic oil inlet 112 and the low-pressure fuel outlet 113 are formed on the first housing 11 , and the elastic member 8 is compressed to the limit position in the needle valve 7 and the first housing 11 Between the surfaces, the needle valve 7 cooperates with the second housing 12 to form the injection chamber 400, and the elastic member 8 is set so that the end of the needle valve 7 blocks the outlet of the injection chamber 400 and the receiving chamber connected between.
  • the bottom of the second housing 12 is provided with an outlet of the accommodation chamber
  • the outlet of the accommodation chamber includes a tapered portion and an outlet portion
  • the end of the needle valve 7 is provided with a tapered surface that matches the tapered portion.
  • the housing 1 further includes a connecting piece 13, which is provided with a limit step matched with the second housing 12, and in addition, the connecting piece 13 is screwed to the first housing 11, so that the The second housing 12 is detachably fixedly connected to the first housing 11 .
  • the cross-sectional shape of the second housing 12 is T-shaped, and a limiting step matching the T-shape is provided in the connecting member 13 to mechanically limit the second housing 12 .
  • the seal 3 , the sleeve 4 , the valve stem 5 , the stopper 6 and the needle valve 7 are sequentially arranged in the accommodating cavity and cooperate to form a hydraulic drive cavity 100 , a fuel control cavity 200 ,
  • the fuel collection chamber 300 and the injection chamber 400, the hydraulic drive chamber 100 can communicate with the medium pressure hydraulic oil inlet 112
  • the fuel control chamber 200 can communicate with the high pressure fuel inlet 111
  • the fuel collection chamber 300 can communicate with the fuel control chamber 200
  • the fuel collection chamber 300 remains in communication with the low-pressure fuel outlet 113
  • the injection chamber 400 remains in communication with the high-pressure fuel inlet 111 .
  • the solenoid valve 2 is configured to open or close the communication between the medium-pressure hydraulic oil inlet 112 and the hydraulic drive chamber 100 .
  • the sleeve 4 cooperates with the inner wall of the accommodating chamber 5 to form a communication channel for communicating with the fuel collection chamber 300 and the fuel control chamber 200, and the sleeve 4 can slide relative to the accommodating chamber to open Or close the flow channel.
  • the needle valve 7 cooperates with the elastic member 8 to slide with the valve rod 5 to open or close the communication between the injection chamber 400 and the outlet of the accommodating chamber.
  • the solenoid valve 2 is a two-position, two-way solenoid valve, through which the opening and closing of the two-position, two-way solenoid valve can realize the switching of medium-pressure and low-pressure hydraulic oil in the hydraulic oil drive chamber 100, and then drive the sleeve 4 to move up and down .
  • the sealing member 3, the sleeve 4, the valve stem 5 and the stopper 6 are all located in the first housing 11, and the sealing member 3 is sealed at one end of the accommodating chamber;
  • the sleeve 4 is slidably sleeved on the stopper 6 and is slidably fitted with the accommodating chamber.
  • the upper end of the sleeve 4 , the end of the seal 3 and the stopper 6 The side walls cooperate to form the hydraulic drive chamber 100 .
  • the seal 3 includes a limiting part, a sealing part and a hydraulic cavity forming part, and the limiting part cooperates with the limiting surface in the first housing 11 to mechanically limit the sealing part 3;
  • the sealing part seals with the inner wall of the first casing 11 through a sealing ring;
  • the hydraulic cavity forming part cooperates with the end of the sleeve 4 to form the hydraulic drive cavity 100 .
  • the forming portion of the hydraulic chamber is conical, and its outer wall is spaced apart from the inner wall of the first housing 11 so as to accommodate hydraulic oil.
  • the end of the valve stem 5, the inner wall of the sleeve 4 and the outer wall of the stopper 6 cooperate to form the fuel control cavity 200; the lower end of the sleeve 4 is in contact with the accommodating cavity
  • the fuel collection cavity 300 is formed by cooperating with the first limiting surface.
  • the fuel collection chamber 300 is configured to collect the control return oil of the fuel control chamber 200 and the leakage return oil in the high-pressure fuel oil circuit.
  • the fuel collection chamber 300 communicates with the low-pressure fuel outlet 113 .
  • the fuel collection chamber 300 is filled with low-pressure liquid fuel, and when the engine is running in non-dual-fuel mode, the fuel collection chamber 300 is filled with inert gas or air.
  • a first through hole 41 is opened on the side wall of the sleeve 4
  • a first groove 42 is opened on the outer wall of the sleeve 4
  • a second groove 42 is opened on the inner wall of the accommodating cavity.
  • Groove 114, the first through hole 41, the first groove 42, and the second groove 114 cooperate to form the flow passage, and the lower end of the first groove 42 is connected with the fuel collection chamber 300 Its upper end can communicate with the first through hole 41 through the second groove 114 .
  • the sleeve 4 slides along the accommodating chamber, when the first groove 42 and the first through hole 41 communicate with the second groove 114 , that is, the fuel control chamber 200 and the The communication channels between the fuel collection chambers 300 communicate.
  • the outer wall of the first through hole 41 abuts against the inner wall of the housing chamber, that is, the first through hole 41 is blocked by the inner wall of the housing chamber, that is, the fuel control chamber 200 and the inner wall of the housing chamber are blocked.
  • the communication channels between the fuel collection chambers 300 are disconnected.
  • the lower end of the stopper 6 is tapered.
  • the inner wall of the sleeve 4 is spaced from the tapered outer wall of the stopper 6, so that the first through hole 41 is close to the stopper.
  • One end of the plug 6 is in an open state and communicates with the fuel control cavity 200, and the outer wall of the sleeve 4 corresponds to the second groove 114 at the inner wall of the first housing 11, so that the first through hole 41 is close to the first housing
  • One end of 11 is in an open state to communicate with the first groove 42 , which realizes the communication between the fuel control chamber 200 and the fuel collection chamber 300 .
  • the valve rod 5 can be driven to move up and down by adjusting the pressure state in the fuel control chamber 200 .
  • the low-carbon fuel injection device further includes a positioning piece 9, and a second through hole is opened on the positioning piece 9, and the end of the positioning piece 9 is matched with the first groove 42, and One end of the second through hole communicates with the first groove 42 , and the other end communicates with the low-pressure fuel outlet 113 .
  • the positioning member 9 can limit the sleeve 4 to prevent the sleeve 4 from rotating when sliding up and down.
  • the second through hole on the positioning member 9 can keep communicating with the low-pressure fuel outlet 113 .
  • fuel passages are opened on the sleeve 4 , the valve stem 5 and the needle valve 7 , and the fuel passages are configured to communicate with the injection chamber 400 and the high-pressure fuel inlet 111 .
  • a third through hole 43 is opened on the side wall of the sleeve 4, a first fuel passage is opened on the valve stem 5, a second fuel passage is opened on the needle valve 7, and the first fuel passage is opened on the needle valve 7.
  • the three through holes 43, the first fuel passage, and the second fuel passage communicate to form the fuel passage.
  • the first fuel passage includes an inlet 51, a first outlet 52 and a second outlet 53, the extending direction of the inlet 51 is perpendicular to the axial direction of the valve stem 5, and the inlet 51 is connected to the first outlet 53.
  • the three through holes 43 communicate with each other, the first outlet 52 and the second outlet 53 are respectively provided at both ends of the valve stem 5 in the axial direction, and the first outlet 52 can communicate with the fuel control chamber 200 , the second outlet 53 remains in communication with the second fuel passage.
  • the second fuel passage includes a first flow channel 71 and a second flow channel 72, the first flow channel 71 communicates with the second outlet 53, and the second flow channel 72 is set to communicate with the The first channel 71 and the injection chamber 400 .
  • the second flow channel 72 is arranged at an included angle with the first flow channel 71 , and a plurality of the second flow channels 72 are arranged at circular intervals around the axis of the needle valve 7 .
  • the stopper 6 is fixed to the end of the sealing member 3 and located inside the sleeve 4, and the valve stem 5 is slidably passed through the sleeve 4, when the When the valve stem 5 abuts against the stopper 6, the communication between the fuel control chamber 200 and the high-pressure fuel inlet 111 is closed, that is, the connection between the second outlet 53 and the fuel control chamber 200 can be blocked by the end surface of the stopper 6 Communication; when the valve stem 5 is spaced apart from the stopper 6 , the fuel control chamber 200 is opened to communicate with the second outlet 53 , so as to maintain communication with the high-pressure fuel inlet 111 .
  • a third groove is formed on the upper end of the sleeve 4 .
  • the upper end of the valve stem 5 is provided with a fourth groove.
  • the matching diameter D1 of the needle valve 7 and the accommodating cavity is larger than the matching diameter D2 of the needle valve 7 and the valve stem 5 .
  • the matching diameter D3 of the valve rod 5 and the sleeve 4 is greater than the matching diameter D4 of the sleeve 4 and the stopper 6 .
  • the matching diameter D3 of the valve rod 5 and the sleeve 4 is larger than the matching diameter D1 of the needle valve 7 and the accommodating cavity.
  • the low-carbon fuel injection device further includes a nozzle assembly 10, the nozzle assembly 10 includes a nozzle 101 and a nozzle connector 102, the nozzle 101 is detachably fixed on the housing 1, and the nozzle The connecting piece 102 is sheathed outside the nozzle 101 and screwed to the housing 1 .
  • the nozzle connecting piece 102 is mechanically limited and fitted with the nozzle 101 , and then the nozzle connecting piece 102 is screwed into the second casing 12 .
  • the nozzle connector 102 is a nozzle screw cap.
  • the fuel control chamber 200 is disconnected from the fuel collection chamber 300, the passage between the fuel control chamber 200 and the fuel collection chamber 300 is cut off, the pressure of the fuel control chamber 200 rises, and the sleeve 4 and the stopper are driven 6 runs to its high position.
  • the driving sleeve 4 and the stopper 6 are at the high position, the circuit between the fuel control chamber 200 and the fuel collection chamber 300 is cut off, and the pressure in the fuel control chamber 200 can reach or approach the inlet pressure.
  • the needle valve 7 is in a closed state under the action of the pretightening force of the elastic member 8 and the driving force of the valve rod 5 .
  • the fuel leaked through the needle valve 7, the housing 1, the valve stem 5, the sleeve 4, and the stopper 6 are all collected in the fuel collection chamber 300, and pass through the first groove 42 on the sleeve 4 and the positioning member 9.
  • the inner hole of is in communication with the low-pressure fuel outlet 113.
  • This embodiment also provides an engine, including the above-mentioned low-carbon fuel injection device, through the application of the above-mentioned low-carbon fuel injection device, the problem of sealing and lubrication and safe use of low-flash point, low-viscosity fuel can be solved, and at the same time it can To meet the safe, fast, efficient and reliable injection requirements of high-power engines using low-carbon fuels.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

The present application relates to the technical field of engines, and disclosed in the present application are a low-carbon fuel injection device and an engine. The low-carbon fuel injection device comprises a housing (1), a solenoid valve (2), and a sealing member (3), a sleeve (4), a plug retainer (6), a valve rod (5), an elastic member (8) and a needle valve (7), which are sequentially arranged inside the housing (1), wherein the housing (1) cooperates with internal components thereof to form a hydraulic driving chamber (100), a fuel control chamber (200), a fuel collecting chamber (300) and an injection chamber (400); the solenoid valve (2) is configured to open or close the communication between a medium-pressure hydraulic oil inlet (112) and the hydraulic driving chamber (100); the valve rod (5) is configured to cooperate with the plug retainer (6) to open or close the communication between the fuel control chamber (200) and a high-pressure fuel inlet (111); the sleeve (4) cooperates with an inner wall of an accommodating chamber to form a circulation channel, which is used for enabling the fuel collecting chamber (300) to be in communication with the fuel control chamber (200); the sleeve (4) can slide relative to the accommodating chamber, so as to open or close the circulation channel; and the needle valve (7) cooperates with the elastic member (8) to be in sliding fit with the valve rod (5), so as to open or close the communication between the injection chamber (400) and an outlet of the accommodating chamber.

Description

一种低碳燃料喷射装置及发动机A low-carbon fuel injection device and engine
本申请要求在2021年11月30日提交中国专利局、申请号为202111444716.7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。This application claims priority to a Chinese patent application with application number 202111444716.7 filed with the China Patent Office on November 30, 2021, the entire contents of which are incorporated herein by reference.
技术领域technical field
本申请涉及发动机技术领域，例如涉及一种低碳燃料喷射装置及发动机。The present application relates to the technical field of engines, for example, to a low-carbon fuel injection device and an engine.
背景技术Background technique
当前随着发动机对温室气体减排的迫切需求，甲醇、氨等低碳或零碳替代燃料使用受到越来越强烈的关注。与传统柴油燃料相比，甲醇、氨等低碳、零碳燃料具有显著的低闪点、低粘度、强腐蚀等特性。上述特性导致低碳、零碳燃料喷射***需要解决密封、润滑问题、安全使用问题、泄漏探测问题等一系列工程难题。At present, with the urgent need for engines to reduce greenhouse gas emissions, the use of low-carbon or zero-carbon alternative fuels such as methanol and ammonia has received more and more attention. Compared with traditional diesel fuel, low-carbon and zero-carbon fuels such as methanol and ammonia have remarkable characteristics such as low flash point, low viscosity and strong corrosion. The above characteristics lead to low-carbon and zero-carbon fuel injection systems need to solve a series of engineering problems such as sealing, lubrication, safe use, and leakage detection.
因此，亟待需要一种低碳燃料喷射装置以解决上述问题。Therefore, there is an urgent need for a low-carbon fuel injection device to solve the above problems.
发明内容Contents of the invention
本申请提供一种低碳燃料喷射装置，能够解决低闪点、低粘度燃料的密封润滑问题及安全使用问题。The application provides a low-carbon fuel injection device, which can solve the problems of sealing and lubrication and safe use of fuels with low flash point and low viscosity.
本申请提供一种发动机，通过应用上述低碳燃料喷射装置，能够解决低闪点、低粘度燃料的密封润滑问题及安全使用问题，同时能够满足大功率发动机对于使用低碳燃料的安全、快速、高效及可靠的喷射需求。The application provides an engine. By applying the above-mentioned low-carbon fuel injection device, it can solve the problem of sealing and lubrication of low-flash point and low-viscosity fuel and the problem of safe use. Efficient and reliable jetting needs.
第一方面，提供了一种低碳燃料喷射装置，包括壳体、电磁阀、密封件、套筒、阀杆、挡塞、针阀和弹性件，所述壳体内开设有贯穿所述壳体的容纳腔；所述壳体的侧壁上开设有高压燃料入口、中压液压油入口和低压燃料出口，所述高压燃料入口、所述中压液压油入口和所述低压燃料出口均与所述容纳腔相 连通；In the first aspect, a low-carbon fuel injection device is provided, including a housing, a solenoid valve, a seal, a sleeve, a valve rod, a stopper, a needle valve and an elastic member, and a accommodating cavity; the side wall of the housing is provided with a high-pressure fuel inlet, a medium-pressure hydraulic oil inlet and a low-pressure fuel outlet, and the high-pressure fuel inlet, the medium-pressure hydraulic oil inlet and the low-pressure fuel outlet are all connected to the The accommodating cavity is connected;
所述密封件、所述套筒、所述阀杆、所述挡塞和所述针阀依次设置于所述容纳腔内并配合形成液压驱动腔、燃料控制腔、燃料收集腔和喷射腔，所述液压驱动腔能够与所述中压液压油入口相连通，所述燃料控制腔能够与所述高压燃料入口相连通，所述燃料收集腔能够与所述燃料控制腔相连通，所述燃料收集腔保持与所述低压燃料出口相连通，所述喷射腔保持与所述高压燃料入口相连通；The seal, the sleeve, the valve stem, the stopper and the needle valve are sequentially arranged in the accommodating chamber and cooperate to form a hydraulic drive chamber, a fuel control chamber, a fuel collection chamber and an injection chamber, The hydraulic drive chamber can communicate with the medium-pressure hydraulic oil inlet, the fuel control chamber can communicate with the high-pressure fuel inlet, the fuel collection chamber can communicate with the fuel control chamber, and the fuel control chamber can communicate with the fuel control chamber. the collection chamber is kept in communication with the low-pressure fuel outlet, and the injection chamber is kept in communication with the high-pressure fuel inlet;
所述电磁阀设置为打开或关闭所述中压液压油入口与所述液压驱动腔之间的连通；The solenoid valve is configured to open or close the communication between the medium-pressure hydraulic oil inlet and the hydraulic drive chamber;
所述挡塞固定于所述密封件端部并位于所述套筒内，所述阀杆可滑动地穿设于所述套筒内，当所述阀杆与所述挡塞抵接时关闭所述燃料控制腔与所述高压燃料入口之间的连通，当所述阀杆与所述挡塞间隔设置时打开所述燃料控制腔与所述高压燃料入口之间的连通；The stopper is fixed to the end of the seal and is located in the sleeve, the valve stem is slidably passed through the sleeve, and is closed when the valve stem abuts against the stopper a communication between the fuel control chamber and the high-pressure fuel inlet, opening the communication between the fuel control chamber and the high-pressure fuel inlet when the valve stem is spaced apart from the stopper;
所述套筒和所述容纳腔的内壁配合形成用于连通所述燃料收集腔和所述燃料控制腔的流通通道，所述套筒能够相对于所述容纳腔滑动以打开或关闭所述流通通道；The sleeve cooperates with the inner wall of the accommodating chamber to form a communication channel for communicating with the fuel collection chamber and the fuel control chamber, and the sleeve can slide relative to the accommodating chamber to open or close the communication channel. aisle;
所述针阀配合所述弹性件与所述阀杆滑动配合，以打开或关闭所述喷射腔与所述容纳腔出口之间的连通。The needle valve cooperates with the elastic member to slide and cooperate with the valve rod, so as to open or close the communication between the injection chamber and the outlet of the accommodating chamber.
第二方面，提供了一种发动机，包括如上所述的低碳燃料喷射装置。In a second aspect, an engine is provided, including the above-mentioned low-carbon fuel injection device.
附图说明Description of drawings
图1为本申请实施例提供的低碳燃料喷射装置的结构示意图；Fig. 1 is a schematic structural view of a low-carbon fuel injection device provided by an embodiment of the present application;
图2为图1中A处的局部放大图；Fig. 2 is a partial enlarged view of place A in Fig. 1;
图3为图1中B处的局部放大图；Fig. 3 is a partial enlarged view of place B in Fig. 1;
图4为本申请实施例提供的低碳燃料喷射装置首次通入液压油的结构示意图；Fig. 4 is a structural schematic diagram of the low-carbon fuel injection device provided by the embodiment of the present application for the first time entering hydraulic oil;
图5为本申请实施例提供的低碳燃料喷射装置首次通入燃料的结构示意图；Fig. 5 is a structural schematic diagram of the low-carbon fuel injection device provided by the embodiment of the present application for the first time to inject fuel;
图6为本申请实施例提供的低碳燃料喷射装置初始等待喷射状态的结构示意图；Fig. 6 is a schematic structural diagram of the low-carbon fuel injection device in the initial waiting injection state provided by the embodiment of the present application;
图7为本申请实施例提供的低碳燃料喷射装置中套筒运行至下限位时的结构示意图；Fig. 7 is a schematic structural view of the low-carbon fuel injection device provided by the embodiment of the present application when the sleeve runs to the lower limit;
图8为本申请实施例提供的低碳燃料喷射装置中阀杆运行至上限位时的结构示意图；Fig. 8 is a schematic structural view of the low-carbon fuel injection device provided by the embodiment of the present application when the valve stem moves to the upper limit;
图9为本申请实施例提供的低碳燃料喷射装置中针阀运行至上限位时的结构示意图；Fig. 9 is a schematic structural view of the needle valve running to the upper limit in the low-carbon fuel injection device provided by the embodiment of the present application;
图10为本申请实施例提供的低碳燃料喷射装置中套筒运行至上限位时的结构示意图。Fig. 10 is a schematic diagram of the structure of the low-carbon fuel injection device provided by the embodiment of the present application when the sleeve runs to the upper limit.
附图标记：Reference signs:
100、液压驱动腔；200、燃料控制腔；300、燃料收集腔；400、喷射腔；100, hydraulic drive chamber; 200, fuel control chamber; 300, fuel collection chamber; 400, injection chamber;
1、壳体；11、第一壳体；111、高压燃料入口；112、中压液压油入口；113、低压燃料出口；114、第二凹槽；12、第二壳体；13、连接件；1. Housing; 11. First housing; 111. High-pressure fuel inlet; 112. Medium-pressure hydraulic oil inlet; 113. Low-pressure fuel outlet; 114. Second groove; 12. Second housing; 13. Connector ;
2、电磁阀；2. Solenoid valve;
3、密封件；3. Seals;
4、套筒；41、第一通孔；42、第一凹槽；43、第三通孔；4. Sleeve; 41. The first through hole; 42. The first groove; 43. The third through hole;
5、阀杆；51、入口；52、第一出口；53、第二出口；5, valve stem; 51, inlet; 52, first outlet; 53, second outlet;
6、挡塞；6. Blocking;
7、针阀；71、第一流道；72、第二流道；7. Needle valve; 71. First flow path; 72. Second flow path;
8、弹性件；8. Elastic parts;
9、定位件；9. Positioning parts;
10、喷嘴组件；101、喷嘴；102、喷嘴连接件。10. Nozzle assembly; 101. Nozzle; 102. Nozzle connector.
具体实施方式Detailed ways
在本申请的描述中，需要说明的是，术语“上”、“下”、“左”、“右”、“竖直”、“水平”、“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，或者是该申请产品使用时惯常摆放的方位或位置关系，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。此外，术语“第一”、“第二”、“第三”等仅用于区分描述，而不能理解为指示或暗示相对重要性。在本申请的描述中，除非另有说明，“多个”的含义是两个或两个以上。In the description of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate directions or The positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that the application product is usually placed in use, and is only for the convenience of describing the application and simplifying the description, rather than indicating or implying the referred device Or elements must have a certain orientation, be constructed and operate in a certain orientation, and thus should not be construed as limiting the application. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions, and should not be construed as indicating or implying relative importance. In the description of the present application, unless otherwise specified, "plurality" means two or more.
在本申请的描述中，还需要说明的是，除非另有明确的规定和限定，术语“设置”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本申请中的具体含义。In the description of this application, it should also be noted that, unless otherwise clearly stipulated and limited, the terms "setting" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, or Connected integrally; either mechanically or electrically. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application in specific situations.
在本申请中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。In this application, unless otherwise expressly specified and limited, a first feature being "on" or "under" a second feature may include direct contact between the first and second features, and may also include the first and second features Not in direct contact but through another characteristic contact between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.
下面详细描述本申请的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。Embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.
如图1-图3所示，本实施例提供的低碳燃料喷射装置，包括壳体1、电磁阀2、密封件3、套筒4、阀杆5、挡塞6、针阀7和弹性件8。本实施例提供的低碳燃料喷射装置，结构简单，集成化程度高，燃料喷射区间灵活可调且响应时间短，并且能够解决低闪点、低粘度燃料的密封润滑问题及安全使用问题， 能满足当前及未来船用大功率发动机对于使用低碳、零碳新型燃料的安全、快速、高效、大流量及高可靠喷射需求。As shown in Figures 1-3, the low-carbon fuel injection device provided in this embodiment includes a housing 1, a solenoid valve 2, a seal 3, a sleeve 4, a valve stem 5, a stopper 6, a needle valve 7 and an elastic Item 8. The low-carbon fuel injection device provided by this embodiment has a simple structure, a high degree of integration, flexible and adjustable fuel injection intervals, and a short response time, and can solve the problem of sealing and lubrication of low-flash point, low-viscosity fuels and safe use. To meet the needs of current and future marine high-power engines for safe, fast, efficient, high-flow and high-reliability injection using low-carbon and zero-carbon new fuels.
所述壳体1内开设有贯穿所述壳体1的容纳腔；所述壳体1的侧壁上开设有高压燃料入口111、中压液压油入口112和低压燃料出口113，所述高压燃料入口111、所述中压液压油入口112和所述低压燃料出口113均与所述容纳腔相连通。The housing 1 is provided with an accommodating chamber that runs through the housing 1; the side wall of the housing 1 is provided with a high-pressure fuel inlet 111, a medium-pressure hydraulic oil inlet 112, and a low-pressure fuel outlet 113. The high-pressure fuel The inlet 111 , the medium-pressure hydraulic oil inlet 112 and the low-pressure fuel outlet 113 are all in communication with the accommodating cavity.
可选地，所述壳体1包括第一壳体11和第二壳体12，所述第二壳体12与所述第一壳体11可拆卸连接，所述高压燃料入口111、所述中压液压油入口112和所述低压燃料出口113均成型于所述第一壳体11上，所述弹性件8被压缩于所述针阀7和所述第一壳体11内的限位面之间，所述针阀7与所述第二壳体12配合形成所述喷射腔400，所述弹性件8设置为使所述针阀7的端部阻挡喷射腔400与容纳腔的出口之间连通。Optionally, the housing 1 includes a first housing 11 and a second housing 12, the second housing 12 is detachably connected to the first housing 11, the high-pressure fuel inlet 111, the Both the medium-pressure hydraulic oil inlet 112 and the low-pressure fuel outlet 113 are formed on the first housing 11 , and the elastic member 8 is compressed to the limit position in the needle valve 7 and the first housing 11 Between the surfaces, the needle valve 7 cooperates with the second housing 12 to form the injection chamber 400, and the elastic member 8 is set so that the end of the needle valve 7 blocks the outlet of the injection chamber 400 and the receiving chamber connected between.
在本实施例中，第二壳体12的底部设置有容纳腔出口，容纳腔出口包括锥状部和出口部，针阀7的端部设有与锥状部配合的锥形面，当针阀7的端部抵接于锥状部时，喷射腔400与出口部阻断不连通，当针阀7远离所述锥状部时，喷射腔400与出口部连通。In this embodiment, the bottom of the second housing 12 is provided with an outlet of the accommodation chamber, the outlet of the accommodation chamber includes a tapered portion and an outlet portion, and the end of the needle valve 7 is provided with a tapered surface that matches the tapered portion. When the end of the valve 7 abuts against the taper, the injection chamber 400 is blocked from communicating with the outlet, and when the needle valve 7 is away from the taper, the injection chamber 400 communicates with the outlet.
可选地，所述壳体1还包括连接件13，连接件13内设有与第二壳体12配合的限位台阶，此外，连接件13与第一壳体11螺纹连接，从而实现将第二壳体12与第一壳体11可拆卸地固定连接。示例性地，第二壳体12的横截面形状为T型，连接件13内设置有与T型配合的限位台阶，以对第二壳体12进行机械限位。Optionally, the housing 1 further includes a connecting piece 13, which is provided with a limit step matched with the second housing 12, and in addition, the connecting piece 13 is screwed to the first housing 11, so that the The second housing 12 is detachably fixedly connected to the first housing 11 . Exemplarily, the cross-sectional shape of the second housing 12 is T-shaped, and a limiting step matching the T-shape is provided in the connecting member 13 to mechanically limit the second housing 12 .
所述密封件3、所述套筒4、所述阀杆5、所述挡塞6和所述针阀7依次设置于所述容纳腔内并配合形成液压驱动腔100、燃料控制腔200、燃料收集腔300和喷射腔400，所述液压驱动腔100能够与所述中压液压油入口112相连通，所述燃料控制腔200能够与所述高压燃料入口111相连通，所述燃料收集腔300能够与所述燃料控制腔200相连通，所述燃料收集腔300保持与所述低压燃料 出口113相连通，所述喷射腔400保持与所述高压燃料入口111相连通。The seal 3 , the sleeve 4 , the valve stem 5 , the stopper 6 and the needle valve 7 are sequentially arranged in the accommodating cavity and cooperate to form a hydraulic drive cavity 100 , a fuel control cavity 200 , The fuel collection chamber 300 and the injection chamber 400, the hydraulic drive chamber 100 can communicate with the medium pressure hydraulic oil inlet 112, the fuel control chamber 200 can communicate with the high pressure fuel inlet 111, the fuel collection chamber 300 can communicate with the fuel control chamber 200 , the fuel collection chamber 300 remains in communication with the low-pressure fuel outlet 113 , and the injection chamber 400 remains in communication with the high-pressure fuel inlet 111 .
所述电磁阀2设置为打开或关闭所述中压液压油入口112与所述液压驱动腔100之间的连通。所述套筒4和所述容纳腔5的内壁配合形成用于连通所述燃料收集腔300和所述燃料控制腔200的流通通道，所述套筒4能够相对于所述容纳腔滑动以打开或关闭所述流通通道。所述针阀7配合所述弹性件8与所述阀杆5滑动配合，以打开或关闭所述喷射腔400与所述容纳腔出口之间的连通。The solenoid valve 2 is configured to open or close the communication between the medium-pressure hydraulic oil inlet 112 and the hydraulic drive chamber 100 . The sleeve 4 cooperates with the inner wall of the accommodating chamber 5 to form a communication channel for communicating with the fuel collection chamber 300 and the fuel control chamber 200, and the sleeve 4 can slide relative to the accommodating chamber to open Or close the flow channel. The needle valve 7 cooperates with the elastic member 8 to slide with the valve rod 5 to open or close the communication between the injection chamber 400 and the outlet of the accommodating chamber.
示例性地，电磁阀2为两位两通电磁阀，通过两位两通电磁阀的开启和关闭可以实现液压油驱动腔100内中压和低压液压油的切换，进而驱动套筒4上下运动。Exemplarily, the solenoid valve 2 is a two-position, two-way solenoid valve, through which the opening and closing of the two-position, two-way solenoid valve can realize the switching of medium-pressure and low-pressure hydraulic oil in the hydraulic oil drive chamber 100, and then drive the sleeve 4 to move up and down .
可选地，所述密封件3、所述套筒4、所述阀杆5和所述挡塞6均位于第一壳体11内，所述密封件3密封于所述容纳腔的一端；所述套筒4可滑动地套设在所述挡塞6上并与所述容纳腔滑动配合，所述套筒4的上端端部、所述密封件3的端部以及所述挡塞6的侧壁配合形成所述液压驱动腔100。Optionally, the sealing member 3, the sleeve 4, the valve stem 5 and the stopper 6 are all located in the first housing 11, and the sealing member 3 is sealed at one end of the accommodating chamber; The sleeve 4 is slidably sleeved on the stopper 6 and is slidably fitted with the accommodating chamber. The upper end of the sleeve 4 , the end of the seal 3 and the stopper 6 The side walls cooperate to form the hydraulic drive chamber 100 .
可选地，所述密封件3包括限位部、密封部和液压腔成型部，所述限位部与第一壳体11内的限位面配合以对密封件3进行机械限位；所述密封部通过密封圈与第一壳体11的内壁密封配合；所述液压腔成型部与套筒4的端部配合形成所述液压驱动腔100。Optionally, the seal 3 includes a limiting part, a sealing part and a hydraulic cavity forming part, and the limiting part cooperates with the limiting surface in the first housing 11 to mechanically limit the sealing part 3; The sealing part seals with the inner wall of the first casing 11 through a sealing ring; the hydraulic cavity forming part cooperates with the end of the sleeve 4 to form the hydraulic drive cavity 100 .
示例性地，液压腔成型部为锥形，其外壁与第一壳体11的内壁间隔设置，以便于容纳液压油。Exemplarily, the forming portion of the hydraulic chamber is conical, and its outer wall is spaced apart from the inner wall of the first housing 11 so as to accommodate hydraulic oil.
可选地，所述阀杆5的端部、所述套筒4的内壁以及所述挡塞6的外壁配合形成所述燃料控制腔200；所述套筒4下端端部与所述容纳腔的第一限位面配合形成所述燃料收集腔300。Optionally, the end of the valve stem 5, the inner wall of the sleeve 4 and the outer wall of the stopper 6 cooperate to form the fuel control cavity 200; the lower end of the sleeve 4 is in contact with the accommodating cavity The fuel collection cavity 300 is formed by cooperating with the first limiting surface.
所述燃料收集腔300设置为收集燃料控制腔200的控制回油和高压燃料油路中的泄露回油。燃料收集腔300与低压燃料出口113相连通。当发动机在双燃料模式运行，燃料收集腔300内为低压液体燃料，在非双燃料模式运行时， 燃料收集腔300内为惰性气体或空气。The fuel collection chamber 300 is configured to collect the control return oil of the fuel control chamber 200 and the leakage return oil in the high-pressure fuel oil circuit. The fuel collection chamber 300 communicates with the low-pressure fuel outlet 113 . When the engine is running in dual-fuel mode, the fuel collection chamber 300 is filled with low-pressure liquid fuel, and when the engine is running in non-dual-fuel mode, the fuel collection chamber 300 is filled with inert gas or air.
可选地，所述套筒4的侧壁上开设有第一通孔41，所述套筒4的外壁上开设有的第一凹槽42，所述容纳腔的内壁上开设有第二凹槽114，所述第一通孔41、所述第一凹槽42、所述第二凹槽114配合形成所述流通通道，所述第一凹槽42的下端与所述燃料收集腔300相连通，其上端能够通过所述第二凹槽114与所述第一通孔41相连通。Optionally, a first through hole 41 is opened on the side wall of the sleeve 4, a first groove 42 is opened on the outer wall of the sleeve 4, and a second groove 42 is opened on the inner wall of the accommodating cavity. Groove 114, the first through hole 41, the first groove 42, and the second groove 114 cooperate to form the flow passage, and the lower end of the first groove 42 is connected with the fuel collection chamber 300 Its upper end can communicate with the first through hole 41 through the second groove 114 .
所述套筒4沿所述容纳腔滑动，当所述第一凹槽42和所述第一通孔41均与所述第二凹槽114连通时，即所述燃料控制腔200与所述燃料收集腔300之间的流通通道流通，当第一通孔41的外壁与所述容纳腔的内壁相抵接，即第一通孔41被容纳腔的内壁堵塞，即所述燃料控制腔200与所述燃料收集腔300之间的流通通道被断开。The sleeve 4 slides along the accommodating chamber, when the first groove 42 and the first through hole 41 communicate with the second groove 114 , that is, the fuel control chamber 200 and the The communication channels between the fuel collection chambers 300 communicate. When the outer wall of the first through hole 41 abuts against the inner wall of the housing chamber, that is, the first through hole 41 is blocked by the inner wall of the housing chamber, that is, the fuel control chamber 200 and the inner wall of the housing chamber are blocked. The communication channels between the fuel collection chambers 300 are disconnected.
可选地，挡塞6的下端设为锥形，当套筒4向下运动至低位时，套筒4的内壁与挡塞6的锥形外壁间隔设置，从而使第一通孔41靠近挡塞6的一端处于开放状态与燃料控制腔200相连通，套筒4的外壁与第一壳体11的内壁处的第二凹槽114相对应，从而使第一通孔41靠近第一壳体11的一端处于开放状态以与第一凹槽42连通，即实现了燃料控制腔200与燃料收集腔300之间的连通。Optionally, the lower end of the stopper 6 is tapered. When the sleeve 4 moves downward to a low position, the inner wall of the sleeve 4 is spaced from the tapered outer wall of the stopper 6, so that the first through hole 41 is close to the stopper. One end of the plug 6 is in an open state and communicates with the fuel control cavity 200, and the outer wall of the sleeve 4 corresponds to the second groove 114 at the inner wall of the first housing 11, so that the first through hole 41 is close to the first housing One end of 11 is in an open state to communicate with the first groove 42 , which realizes the communication between the fuel control chamber 200 and the fuel collection chamber 300 .
当套筒4处于高位，第一通孔41与燃料控制腔200、第一凹槽42与第一通孔41之间的通路被切断，燃料控制腔200保持高压状态；当套筒4处于低位，第一通孔41与燃料控制腔200、第一凹槽42与第一通孔41之间的通路被打开，燃料控制腔200与燃料低压回路连通，燃料控制腔200内压力降低。通过调节燃料控制腔200内的压力状态可以驱动阀杆5上下运动。When the sleeve 4 is at a high position, the passage between the first through hole 41 and the fuel control chamber 200, the first groove 42 and the first through hole 41 is cut off, and the fuel control chamber 200 maintains a high pressure state; when the sleeve 4 is at a low position The passages between the first through hole 41 and the fuel control chamber 200, the first groove 42 and the first through hole 41 are opened, the fuel control chamber 200 communicates with the fuel low pressure circuit, and the pressure in the fuel control chamber 200 decreases. The valve rod 5 can be driven to move up and down by adjusting the pressure state in the fuel control chamber 200 .
可选地，所述低碳燃料喷射装置还包括定位件9，所述定位件9上开设有第二通孔，所述定位件9的端部与所述第一凹槽42相配合，且所述第二通孔的一端与所述第一凹槽42相连通，其另一端与所述低压燃料出口113相连通。所述定位件9能够对套筒4进行限位，避免套筒4在上下滑动的过程中发生转动，此外，所述定位件9上的第二通孔能够保持与低压燃料出口113连通。Optionally, the low-carbon fuel injection device further includes a positioning piece 9, and a second through hole is opened on the positioning piece 9, and the end of the positioning piece 9 is matched with the first groove 42, and One end of the second through hole communicates with the first groove 42 , and the other end communicates with the low-pressure fuel outlet 113 . The positioning member 9 can limit the sleeve 4 to prevent the sleeve 4 from rotating when sliding up and down. In addition, the second through hole on the positioning member 9 can keep communicating with the low-pressure fuel outlet 113 .
可选地，所述套筒4、所述阀杆5和所述针阀7上均开设有燃料通路，所述燃料通路设置为连通所述喷射腔400和所述高压燃料入口111。Optionally, fuel passages are opened on the sleeve 4 , the valve stem 5 and the needle valve 7 , and the fuel passages are configured to communicate with the injection chamber 400 and the high-pressure fuel inlet 111 .
可选地，所述套筒4的侧壁上开设有第三通孔43、所述阀杆5上开设有第一燃料通路、所述针阀7上开设有第二燃料通路，所述第三通孔43、所述第一燃料通路、所述第二燃料通路相连通形成所述燃料通路。Optionally, a third through hole 43 is opened on the side wall of the sleeve 4, a first fuel passage is opened on the valve stem 5, a second fuel passage is opened on the needle valve 7, and the first fuel passage is opened on the needle valve 7. The three through holes 43, the first fuel passage, and the second fuel passage communicate to form the fuel passage.
可选地，所述第一燃料通路包括入口51、第一出口52和第二出口53，所述入口51的延伸方向与所述阀杆5的轴线方向垂直，所述入口51与所述第三通孔43相连通，所述第一出口52和所述第二出口53分别设于所述阀杆5轴线方向的两端，所述第一出口52能够与所述燃料控制腔200相连通，所述第二出口53保持与所述第二燃料通路相连通。Optionally, the first fuel passage includes an inlet 51, a first outlet 52 and a second outlet 53, the extending direction of the inlet 51 is perpendicular to the axial direction of the valve stem 5, and the inlet 51 is connected to the first outlet 53. The three through holes 43 communicate with each other, the first outlet 52 and the second outlet 53 are respectively provided at both ends of the valve stem 5 in the axial direction, and the first outlet 52 can communicate with the fuel control chamber 200 , the second outlet 53 remains in communication with the second fuel passage.
可选地，所述第二燃料通路包括第一流道71和第二流道72，所述第一流道71与所述第二出口53相连通，所述第二流道72设置为连通所述第一流道71和所述喷射腔400。可选地，所述第二流道72与所述第一流道71呈夹角设置，且多个所述第二流道72以所述针阀7的轴线为中心呈圆形间隔设置。Optionally, the second fuel passage includes a first flow channel 71 and a second flow channel 72, the first flow channel 71 communicates with the second outlet 53, and the second flow channel 72 is set to communicate with the The first channel 71 and the injection chamber 400 . Optionally, the second flow channel 72 is arranged at an included angle with the first flow channel 71 , and a plurality of the second flow channels 72 are arranged at circular intervals around the axis of the needle valve 7 .
在本实施例中，所述挡塞6固定于所述密封件3端部并位于所述套筒4内，所述阀杆5可滑动地穿设于所述套筒4内，当所述阀杆5与所述挡塞6抵接时关闭所述燃料控制腔200与所述高压燃料入口111之间的连通，即通过挡塞6的端面可以阻挡第二出口53与燃料控制腔200的连通；当所述阀杆5与所述挡塞6间隔设置时打开所述燃料控制腔200与第二出口53连通，从而能够与所述高压燃料入口111之间保持连通。In this embodiment, the stopper 6 is fixed to the end of the sealing member 3 and located inside the sleeve 4, and the valve stem 5 is slidably passed through the sleeve 4, when the When the valve stem 5 abuts against the stopper 6, the communication between the fuel control chamber 200 and the high-pressure fuel inlet 111 is closed, that is, the connection between the second outlet 53 and the fuel control chamber 200 can be blocked by the end surface of the stopper 6 Communication; when the valve stem 5 is spaced apart from the stopper 6 , the fuel control chamber 200 is opened to communicate with the second outlet 53 , so as to maintain communication with the high-pressure fuel inlet 111 .
为了避免套筒4在高位时与密封件3黏连，所述套筒4的上端端部开设有第三凹槽。同理，为了避免阀杆5在高位时与挡塞6黏连，所述阀杆5的上端端部开设有第四凹槽。In order to prevent the sleeve 4 from sticking to the sealing member 3 when it is in a high position, a third groove is formed on the upper end of the sleeve 4 . Similarly, in order to prevent the valve stem 5 from sticking to the stopper 6 when it is in a high position, the upper end of the valve stem 5 is provided with a fourth groove.
可选地，所述针阀7与所述容纳腔的配合直径D1大于所述针阀7与所述阀杆5的配合直径D2。可选地，所述阀杆5与所述套筒4的配合直径D3大于所述套筒4与所述挡塞6的配合直径D4。可选地，所述阀杆5与所述套筒4的 配合直径D3大于所述针阀7与所述容纳腔的配合直径D1。Optionally, the matching diameter D1 of the needle valve 7 and the accommodating cavity is larger than the matching diameter D2 of the needle valve 7 and the valve stem 5 . Optionally, the matching diameter D3 of the valve rod 5 and the sleeve 4 is greater than the matching diameter D4 of the sleeve 4 and the stopper 6 . Optionally, the matching diameter D3 of the valve rod 5 and the sleeve 4 is larger than the matching diameter D1 of the needle valve 7 and the accommodating cavity.
可选地，所述低碳燃料喷射装置还包括喷嘴组件10，所述喷嘴组件10包括喷嘴101和喷嘴连接件102，所述喷嘴101可拆卸地固定在所述壳体1上，所述喷嘴连接件102套设在所述喷嘴101外并与所述壳体1螺纹连接。Optionally, the low-carbon fuel injection device further includes a nozzle assembly 10, the nozzle assembly 10 includes a nozzle 101 and a nozzle connector 102, the nozzle 101 is detachably fixed on the housing 1, and the nozzle The connecting piece 102 is sheathed outside the nozzle 101 and screwed to the housing 1 .
示例性地，所述喷嘴连接件102与喷嘴101通过机械限位配合，然后所述喷嘴连接件102与第二壳体12螺纹连接。示例性地，喷嘴连接件102为喷嘴螺帽。Exemplarily, the nozzle connecting piece 102 is mechanically limited and fitted with the nozzle 101 , and then the nozzle connecting piece 102 is screwed into the second casing 12 . Exemplarily, the nozzle connector 102 is a nozzle screw cap.
为了方便理解，本实施例提供的低碳燃料喷射装置的工作过程如下：For the convenience of understanding, the working process of the low-carbon fuel injection device provided in this embodiment is as follows:
首次通入液压油和液体燃料时，燃料喷射装置的动作过程：When the hydraulic oil and liquid fuel are injected for the first time, the action process of the fuel injection device:
1)如图4所示，当向燃料喷射装置通入液压油时，由于电磁阀2处于断电状态，中压液压油被阻挡在电磁阀2的中压液压油入口112处，液压驱动腔100与低压液压油回路连通，套筒4和挡塞6在低压液压油的驱动力作用下处于低位。针阀7在弹性件8的预紧力作用下处于低位关闭状态。1) As shown in Figure 4, when the hydraulic oil is fed into the fuel injection device, because the solenoid valve 2 is in a power-off state, the medium-pressure hydraulic oil is blocked at the medium-pressure hydraulic oil inlet 112 of the solenoid valve 2, and the hydraulic drive chamber 100 communicates with the low-pressure hydraulic oil circuit, and the sleeve 4 and the stopper 6 are at a low position under the driving force of the low-pressure hydraulic oil. The needle valve 7 is in a low position closed state under the pre-tightening force of the elastic member 8 .
2)如图5所示，首次向燃料喷射装置通入液体燃料时：液体燃料经壳体1和套筒4上的高压燃料流通通路后分为两路：一路向下流经阀杆5和针阀7的流通通道后，到达喷射腔400，等待喷射；一路向上流经阀杆5上的第一出口52后，到达燃料控制腔200，由于此时套筒4上的第一通孔41被挡塞6所遮挡，燃料控制腔200与燃料收集腔300断开，燃料控制腔200与燃料收集腔300之间的通路被切断，燃料控制腔200压力升高，并驱动套筒4和挡塞6运行至其高位。当驱动套筒4和挡塞6处于高位时，燃料控制腔200与燃料收集腔300之间的回路被切断，燃料控制腔200内的压力可达到或接近入口压力。此时，针阀7在弹性件8的预紧力和阀杆5的驱动力作用下处于关闭状态。通过针阀7、壳体1、阀杆5、套筒4、挡塞6间隙泄露的燃料均收集到燃料收集腔300内，并通过套筒4上的第一凹槽42和定位件9上的内孔与低压燃料出口113连通。2) As shown in Figure 5, when the liquid fuel is injected into the fuel injection device for the first time: the liquid fuel is divided into two paths after passing through the high-pressure fuel circulation path on the casing 1 and the sleeve 4: one path flows downward through the valve stem 5 and the needle After the flow channel of the valve 7, it reaches the injection chamber 400, waiting for injection; after flowing upwards all the way through the first outlet 52 on the valve stem 5, it reaches the fuel control chamber 200, because the first through hole 41 on the sleeve 4 is blocked at this time. Blocked by the stopper 6, the fuel control chamber 200 is disconnected from the fuel collection chamber 300, the passage between the fuel control chamber 200 and the fuel collection chamber 300 is cut off, the pressure of the fuel control chamber 200 rises, and the sleeve 4 and the stopper are driven 6 runs to its high position. When the driving sleeve 4 and the stopper 6 are at the high position, the circuit between the fuel control chamber 200 and the fuel collection chamber 300 is cut off, and the pressure in the fuel control chamber 200 can reach or approach the inlet pressure. At this time, the needle valve 7 is in a closed state under the action of the pretightening force of the elastic member 8 and the driving force of the valve rod 5 . The fuel leaked through the needle valve 7, the housing 1, the valve stem 5, the sleeve 4, and the stopper 6 are all collected in the fuel collection chamber 300, and pass through the first groove 42 on the sleeve 4 and the positioning member 9. The inner hole of is in communication with the low-pressure fuel outlet 113.
燃料喷射过程：Fuel injection process:
1)如图6所示，燃料喷射阀初始等待喷射的状态。1) As shown in Fig. 6, the fuel injection valve is initially waiting for injection.
2)如图7所示，当发动机需要进行燃料喷射时，控制***发出控制信号，电磁阀2通电，中压液压油通过电磁阀2进入液压驱动腔100，由于套筒4上部的液压油作用面积大于中部的高压液体燃料作用面积，故套筒4将向下运动至壳体1上的机械限位处；2) As shown in Figure 7, when the engine needs fuel injection, the control system sends out a control signal, the solenoid valve 2 is energized, and the medium-pressure hydraulic oil enters the hydraulic drive chamber 100 through the solenoid valve 2, due to the action of the hydraulic oil on the upper part of the sleeve 4 The area is larger than the high-pressure liquid fuel action area in the middle, so the sleeve 4 will move down to the mechanical limit on the housing 1;
3)如图8所示，当套筒4到达下限位后，燃料控制腔200经套筒4上的第一通孔41与燃料收集腔300连通，燃料控制腔200压力降低，阀杆5在底部高压燃料的作用力下向上运动，直至与挡塞6接触；3) As shown in Figure 8, when the sleeve 4 reaches the lower limit, the fuel control chamber 200 communicates with the fuel collection chamber 300 through the first through hole 41 on the sleeve 4, the pressure of the fuel control chamber 200 decreases, and the valve stem 5 The force of the high-pressure fuel at the bottom moves upward until it contacts the stopper 6;
4)如图9所示，当阀杆5运行至上限位后，由于针阀7顶部和底部所受压力相同，但顶部作用面积小于底部，故喷射腔400体内的高压燃料将驱动针阀7克服顶部燃料作用力和弹性件8的预紧力而向上运动，直至到达阀杆5的上限位，喷射腔400体内的高压液体燃料经喷嘴101喷入发动机燃烧室；4) As shown in Figure 9, when the valve stem 5 moves to the upper limit, since the pressure on the top and bottom of the needle valve 7 is the same, but the action area of the top is smaller than that of the bottom, the high-pressure fuel in the injection chamber 400 will drive the needle valve 7 Overcoming the force of the top fuel and the pretightening force of the elastic member 8, it moves upward until it reaches the upper limit of the valve stem 5, and the high-pressure liquid fuel in the injection chamber 400 is sprayed into the combustion chamber of the engine through the nozzle 101;
5)如图10所示，当燃料喷射量达到发动机需求后，控制***发出控制信号，电磁阀2断电，液压驱动腔100与中压液压油入口112之间的通路被切断，与低压液压油出口之间的通路连通，液压驱动腔100内液压油压力降低，套筒4在燃料控制腔200中低压燃料和燃料收集腔300中低压燃料的驱动力作用下上行，并到达密封件3的机械限位处，燃料控制腔200与低压燃料出口113之间的通路被切断；5) As shown in Figure 10, when the fuel injection quantity reaches the engine demand, the control system sends a control signal, the solenoid valve 2 is powered off, the passage between the hydraulic drive chamber 100 and the medium-pressure hydraulic oil inlet 112 is cut off, and the low-pressure hydraulic oil The passage between the oil outlets communicates, the pressure of the hydraulic oil in the hydraulic drive chamber 100 decreases, the sleeve 4 moves upward under the driving force of the low-pressure fuel in the fuel control chamber 200 and the low-pressure fuel in the fuel collection chamber 300, and reaches the seal 3 At the mechanical limit, the passage between the fuel control chamber 200 and the low-pressure fuel outlet 113 is cut off;
6)当燃料控制腔200与低压燃料出口113之间的通路被切断后，高压燃料入口111处的高压燃料通过阀杆5上的第一出口52不断输入到燃料控制腔200内，燃料控制腔200内燃料压力将增加至达到或接近入口压力，此高压压力作用在阀杆5的顶部，驱动阀杆5和针阀7克服针阀7底部的高压燃料作用力而向下运动，直至针阀7关闭，燃料喷射结束，燃料喷射装置恢复至初始如图6所示的待喷射状态。6) When the passage between the fuel control chamber 200 and the low-pressure fuel outlet 113 is cut off, the high-pressure fuel at the high-pressure fuel inlet 111 is continuously input into the fuel control chamber 200 through the first outlet 52 on the valve stem 5, and the fuel control chamber The fuel pressure within 200 will increase until it reaches or approaches the inlet pressure, and this high pressure acts on the top of the valve stem 5, driving the valve stem 5 and the needle valve 7 to overcome the force of high-pressure fuel at the bottom of the needle valve 7 and move downward until the needle valve 7 is closed, the fuel injection ends, and the fuel injection device returns to the initial ready-to-inject state as shown in Figure 6 .
本实施例还提供了一种发动机，包括如上所述的低碳燃料喷射装置，通过应用上述低碳燃料喷射装置，能够解决低闪点、低粘度燃料的密封润滑问题及 安全使用问题，同时能够满足大功率发动机对于使用低碳燃料的安全、快速、高效及可靠的喷射需求。This embodiment also provides an engine, including the above-mentioned low-carbon fuel injection device, through the application of the above-mentioned low-carbon fuel injection device, the problem of sealing and lubrication and safe use of low-flash point, low-viscosity fuel can be solved, and at the same time it can To meet the safe, fast, efficient and reliable injection requirements of high-power engines using low-carbon fuels.

Claims (10)

  1. 一种低碳燃料喷射装置，包括壳体(1)、电磁阀(2)、密封件(3)、套筒(4)、阀杆(5)、挡塞(6)、针阀(7)和弹性件(8)，所述壳体(1)内开设有贯穿所述壳体(1)的容纳腔；所述壳体(1)的侧壁上开设有高压燃料入口(111)、中压液压油入口(112)和低压燃料出口(113)，所述高压燃料入口(111)、所述中压液压油入口(112)和所述低压燃料出口(113)均与所述容纳腔相连通；A low-carbon fuel injection device, comprising a housing (1), a solenoid valve (2), a seal (3), a sleeve (4), a valve stem (5), a stopper (6), and a needle valve (7) and an elastic member (8), the housing (1) is provided with an accommodating cavity through the housing (1); the side wall of the housing (1) is provided with a high-pressure fuel inlet (111), a middle A high-pressure hydraulic oil inlet (112) and a low-pressure fuel outlet (113), the high-pressure fuel inlet (111), the medium-pressure hydraulic oil inlet (112) and the low-pressure fuel outlet (113) are all connected to the accommodating chamber Pass;
    所述密封件(3)、所述套筒(4)、所述阀杆(5)、所述挡塞(6)和所述针阀(7)依次设置于所述容纳腔内并配合形成液压驱动腔(100)、燃料控制腔(200)、燃料收集腔(300)和喷射腔(400)，所述液压驱动腔(100)能够与所述中压液压油入口(112)相连通，所述燃料控制腔(200)能够与所述高压燃料入口(111)相连通，所述燃料收集腔(300)能够与所述燃料控制腔(200)相连通，所述燃料收集腔(300)保持与所述低压燃料出口(113)相连通，所述喷射腔(400)保持与所述高压燃料入口(111)相连通；The sealing member (3), the sleeve (4), the valve stem (5), the stopper (6) and the needle valve (7) are sequentially arranged in the accommodating cavity and cooperate to form a a hydraulic drive chamber (100), a fuel control chamber (200), a fuel collection chamber (300) and an injection chamber (400), the hydraulic drive chamber (100) can communicate with the medium-pressure hydraulic oil inlet (112), The fuel control chamber (200) can communicate with the high-pressure fuel inlet (111), the fuel collection chamber (300) can communicate with the fuel control chamber (200), and the fuel collection chamber (300) keeping in communication with the low-pressure fuel outlet (113), and the injection cavity (400) keeping in communication with the high-pressure fuel inlet (111);
    所述电磁阀(2)设置为打开或关闭所述中压液压油入口(112)与所述液压驱动腔(100)之间的连通；The solenoid valve (2) is configured to open or close the communication between the medium-pressure hydraulic oil inlet (112) and the hydraulic drive chamber (100);
    所述挡塞(6)固定于所述密封件(3)端部并位于所述套筒(4)内，所述阀杆(5)可滑动地穿设于所述套筒(4)内，当所述阀杆(5)与所述挡塞(6)抵接时关闭所述燃料控制腔(200)与所述高压燃料入口(111)之间的连通，当所述阀杆(5)与所述挡塞(6)间隔设置时打开所述燃料控制腔(200)与所述高压燃料入口(111)之间的连通；The stopper (6) is fixed on the end of the seal (3) and located in the sleeve (4), and the valve stem (5) is slidably passed through the sleeve (4) , when the valve stem (5) abuts against the stopper (6), the communication between the fuel control chamber (200) and the high-pressure fuel inlet (111) is closed, and when the valve stem (5 ) opens the communication between the fuel control chamber (200) and the high-pressure fuel inlet (111) when spaced apart from the stopper (6);
    所述套筒(4)和所述容纳腔的内壁配合形成用于连通所述燃料收集腔(300)和所述燃料控制腔(200)的流通通道，所述套筒(4)能够相对于所述容纳腔滑动以打开或关闭所述流通通道；The sleeve (4) cooperates with the inner wall of the accommodating chamber to form a communication channel for communicating with the fuel collection chamber (300) and the fuel control chamber (200), and the sleeve (4) can be relatively The accommodating chamber slides to open or close the communication channel;
    所述针阀(7)配合所述弹性件(8)与所述阀杆(5)滑动配合，以打开或关闭所述喷射腔(400)与所述容纳腔出口之间的连通。The needle valve (7) cooperates with the elastic member (8) and slides with the valve rod (5) to open or close the communication between the injection chamber (400) and the outlet of the accommodation chamber.
  2. 根据权利要求1所述的低碳燃料喷射装置，其中，所述阀杆(5)的端 部、所述套筒(4)的内壁以及所述挡塞(6)的外壁配合形成所述燃料控制腔(200)；所述套筒(4)下端端部与所述容纳腔的第一限位面配合形成所述燃料收集腔(300)；The low-carbon fuel injection device according to claim 1, wherein the end of the valve stem (5), the inner wall of the sleeve (4) and the outer wall of the stopper (6) cooperate to form the fuel A control chamber (200); the lower end of the sleeve (4) cooperates with the first limiting surface of the accommodation chamber to form the fuel collection chamber (300);
    所述套筒(4)的侧壁上开设有第一通孔(41)，所述套筒(4)的外壁上开设有的第一凹槽(42)，所述容纳腔的内壁上开设有第二凹槽(114)，所述第一通孔(41)、所述第一凹槽(42)、所述第二凹槽(114)配合形成所述流通通道，所述第一凹槽(42)的下端与所述燃料收集腔(300)相连通，其上端能够通过所述第二凹槽(114)与所述第一通孔(41)相连通。A first through hole (41) is opened on the side wall of the sleeve (4), a first groove (42) is opened on the outer wall of the sleeve (4), and a first groove (42) is opened on the inner wall of the accommodating cavity. There is a second groove (114), the first through hole (41), the first groove (42), and the second groove (114) cooperate to form the flow channel, and the first groove The lower end of the groove (42) communicates with the fuel collection cavity (300), and its upper end can communicate with the first through hole (41) through the second groove (114).
  3. 根据权利要求2所述的低碳燃料喷射装置，还包括定位件(9)，所述定位件(9)上开设有第二通孔，所述定位件(9)的端部与所述第一凹槽(42)相配合，且所述第二通孔的一端与所述第一凹槽(42)相连通，其另一端与所述低压燃料出口(113)相连通。The low-carbon fuel injection device according to claim 2, further comprising a positioning piece (9), the positioning piece (9) is provided with a second through hole, and the end of the positioning piece (9) is connected to the first A groove (42) matches, and one end of the second through hole communicates with the first groove (42), and the other end communicates with the low-pressure fuel outlet (113).
  4. 根据权利要求1所述的低碳燃料喷射装置，其中，The low-carbon fuel injection device according to claim 1, wherein,
    所述套筒(4)的侧壁上开设有第三通孔(43)、所述阀杆(5)上开设有第一燃料通路、所述针阀(7)上开设有第二燃料通路，所述第三通孔(43)、所述第一燃料通路、所述第二燃料通路相连通形成燃料通路，所述燃料通路设置为连通所述喷射腔(400)和所述高压燃料入口(111)。A third through hole (43) is opened on the side wall of the sleeve (4), a first fuel passage is opened on the valve stem (5), and a second fuel passage is opened on the needle valve (7). , the third through hole (43), the first fuel passage, and the second fuel passage communicate to form a fuel passage, and the fuel passage is set to communicate with the injection chamber (400) and the high-pressure fuel inlet (111).
  5. 根据权利要求4所述的低碳燃料喷射装置，其中，所述第一燃料通路包括入口(51)、第一出口(52)和第二出口(53)，所述入口(51)的延伸方向与所述阀杆(5)的轴线方向垂直，所述入口(51)与所述第三通孔(43)相连通，所述第一出口(52)和所述第二出口(53)分别设于所述阀杆(5)轴线方向的两端，所述第一出口(52)能够与所述燃料控制腔(200)相连通，所述第二出口(53)保持与所述第二燃料通路相连通；The low-carbon fuel injection device according to claim 4, wherein the first fuel passage includes an inlet (51), a first outlet (52) and a second outlet (53), and the extending direction of the inlet (51) Perpendicular to the axial direction of the valve stem (5), the inlet (51) communicates with the third through hole (43), and the first outlet (52) and the second outlet (53) are respectively Located at both ends of the valve stem (5) in the axial direction, the first outlet (52) can communicate with the fuel control chamber (200), and the second outlet (53) remains connected to the second The fuel passages are connected;
    所述第二燃料通路包括第一流道(71)和第二流道(72)，所述第一流道(71)与所述第二出口(53)相连通，所述第二流道(72)设置为连通所述第一流道(71)和所述喷射腔(400)。The second fuel passage includes a first flow channel (71) and a second flow channel (72), the first flow channel (71) communicates with the second outlet (53), and the second flow channel (72 ) is set to communicate with the first flow channel (71) and the injection chamber (400).
  6. 根据权利要求5所述的低碳燃料喷射装置，其中，多个所述第二流道(72)以所述针阀(7)的轴线为中心呈圆形间隔设置，每个第二流道(72)与所述第一流道(71)呈夹角设置。The low-carbon fuel injection device according to claim 5, wherein a plurality of the second flow passages (72) are arranged at circular intervals around the axis of the needle valve (7), and each second flow passage (72) is arranged at an included angle with the first flow channel (71).
  7. 根据权利要求1-6任一项所述的低碳燃料喷射装置，其中，所述针阀(7)与所述容纳腔的配合直径(D1)大于所述针阀(7)与所述阀杆(5)的配合直径(D2)；The low-carbon fuel injection device according to any one of claims 1-6, wherein the matching diameter (D1) of the needle valve (7) and the accommodating cavity is larger than that of the needle valve (7) and the valve Fitting diameter (D2) of rod (5);
    所述阀杆(5)与所述套筒(4)的配合直径(D3)大于所述套筒(4)与所述挡塞(6)的配合直径(D4)；The matching diameter (D3) of the valve stem (5) and the sleeve (4) is greater than the matching diameter (D4) of the sleeve (4) and the stopper (6);
    所述阀杆(5)与所述套筒(4)的配合直径(D3)大于所述针阀(7)与所述容纳腔的配合直径(D1)。The fitting diameter (D3) of the valve stem (5) and the sleeve (4) is greater than the fitting diameter (D1) of the needle valve (7) and the accommodating chamber.
  8. 根据权利要求7所述的低碳燃料喷射装置，其中，所述套筒(4)的上端端部开设有第三凹槽；所述阀杆(5)的上端端部开设有第四凹槽。The low-carbon fuel injection device according to claim 7, wherein, the upper end of the sleeve (4) is provided with a third groove; the upper end of the valve rod (5) is provided with a fourth groove .
  9. 根据权利要求7所述的低碳燃料喷射装置，其中，所述壳体(1)包括第一壳体(11)和第二壳体(12)，所述第二壳体(12)与所述第一壳体(11)可拆卸连接，所述高压燃料入口(111)、所述中压液压油入口(112)和所述低压燃料出口(113)均成型于所述第一壳体(11)上，所述弹性件(8)被压缩于所述针阀(7)和所述第一壳体(11)内的限位面之间，所述针阀(7)与所述第二壳体(12)配合形成所述喷射腔(400)。The low-carbon fuel injection device according to claim 7, wherein, the housing (1) comprises a first housing (11) and a second housing (12), and the second housing (12) and the The first casing (11) is detachably connected, and the high-pressure fuel inlet (111), the medium-pressure hydraulic oil inlet (112) and the low-pressure fuel outlet (113) are all formed in the first casing ( 11), the elastic member (8) is compressed between the needle valve (7) and the limit surface in the first housing (11), the needle valve (7) and the first housing (11) The two housings (12) cooperate to form the injection chamber (400).
  10. 一种发动机，包括如权利要求1-9任一项所述的低碳燃料喷射装置。An engine comprising the low-carbon fuel injection device according to any one of claims 1-9.
PCT/CN2022/115368 2021-11-30 2022-08-29 Low-carbon fuel injection device and engine WO2023098178A1 (en)

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