CN109681348A - A kind of medium-speed engine double fuel fuel injector - Google Patents
A kind of medium-speed engine double fuel fuel injector Download PDFInfo
- Publication number
- CN109681348A CN109681348A CN201811632656.XA CN201811632656A CN109681348A CN 109681348 A CN109681348 A CN 109681348A CN 201811632656 A CN201811632656 A CN 201811632656A CN 109681348 A CN109681348 A CN 109681348A
- Authority
- CN
- China
- Prior art keywords
- fuel
- injector body
- valve
- rod
- injector
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- 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
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0248—Injectors
-
- 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
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0248—Injectors
- F02M21/0257—Details of the valve closing elements, e.g. valve seats, stems or arrangement of flow passages
-
- 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
Abstract
The present invention relates to a kind of medium-speed engine double fuel fuel injectors, including injector body, it is characterized in that: a screw press and the injector body threaded upper ends are cooperatively connected, and are locked by a locking nut；One high pressure pipe assembly and the injector body upper vertical are cooperatively connected；The high pressure pipe assembly is connected to oil input channel in the injector body；One nozzle assembly is located at the lower end of the injector body；The nozzle assembly is separate structure, is constituted from valve-rod body, the nozzle docked by a positioning pin with valve-rod body, with the valve rod with valve-rod body and nozzle chamber, the nozzle assembly is fixedly connected on the lower end of the injector body by the tight cap of a nozzle.The present invention can be improved leakproofness, reduces fuel leakage, is able to extend the service life of nozzle assembly.
Description
Technical field
The present invention relates to engines, and in particular to a kind of medium-speed engine double fuel fuel injector is especially suitable for revolving speed
600~900 r/min, single cylinder rated power are 350~420kW, cylinder diameter is φ 300~φ 340mm, stroke is 380~450mm
Dual fuel engine fuel injector.
Due to petroleum resources shortage and increasing environmental pollution, will be faced using petroleum as the conventional engines of fuel huge
Challenge.Suitable as the dual fuel engine thermal efficiency and diesel engine of fuel using fuel oil, natural gas, not only fuel cost is low, and
Pollutant emission, especially PM, NOx, SOx etc. is effectively reduced.Exploitation has become for the fuel injector of dual fuel engine must
Right trend.Dual fuel engine generally has two sets of fuel injection systems, and a set of is main fuel system, mainly in pure diesel oil mould
It works under formula；Another set of is micro- spray pilot fuel system, is mainly worked under natural gas mode；The oil spout of two sets of fuel systems
Device is mounted in cylinder head simultaneously, also has inlet and outlet road and other component etc. in cylinder head, in addition, marine diesel gas
The features such as cylinder cap thickness is big, therefore micro- injection injector has installation space small, and height dimension is big.
Compared with traditional main fuel injector, micro- injection injector belongs to typical slender structure, the radial dimension of fuel injector
It is very limited, and axial height size is bigger than normal, causes more compact between the components of fuel injector.Further, since double combustions
Amount of fuel required for material engine ignites is very small, and small oil mass stability is one of the important indicator of micro- injection injector.Therefore,
The strict demand of structure size and small oil mass stability restricts the development of micro- injection injector.
CN 103590947A discloses a kind of double oil duct fuel injectors of controllable fuel oil temperature, is equipped with inside oil injector body
Double oil input channels are respectively main oil gallery and controlled oil duct, while fuel Heating plug being arranged before controlled oil duct fuel feed hole, controlled to inject
The fuel Heating of oil duct, main oil gallery can continuously provide low temperature fuel oil, and controlled oil duct provides the high temp oil-fired of setting, high temperature and low temperature
Fuel oil mixes in proportion in fuel mixing chamber, realizes that fuel oil is sprayed by different temperatures.Meanwhile the fuel injector removes fuel oil and adds
Heat plug, main fuel distribution may be implemented the mixing of double fuel, can be good in main oil gallery, secondary fuel distribution in controlled oil duct
Dual fuel injection combustion mode at this stage is adapted to, not only optimizes the fuel atomization effect of in-cylinder direct fuel-injection engine, significantly
The burning and emissions quality of engine are improved, meanwhile, realize quantitative mixing and the spray combustion of double fuel.Unquestionably,
This is a kind of good try of technical field.
Summary of the invention
The object of the present invention is to provide a kind of medium-speed engine double fuel fuel injectors, can be improved leakproofness, reduce combustion
Oil leakage, is able to extend the service life of nozzle assembly.
A kind of medium-speed engine double fuel fuel injector of the present invention, including injector body, it is characterized in that: a pressure regulation
Screw rod and the injector body threaded upper ends are cooperatively connected, and are locked by a locking nut；
One high pressure pipe assembly and the injector body upper vertical are cooperatively connected；The high pressure pipe assembly and the fuel injector
Oil input channel is connected in ontology；
One nozzle assembly is located at the lower end of the injector body.
Further, the nozzle assembly is separate structure, by valve-rod body, the spray docked by a positioning pin with valve-rod body
Mouth, the valve rod cooperated with valve-rod body and nozzle chamber are constituted；It is equipped with and the oil input channel in injector body in the valve-rod body
The oil spout road of connection；The nozzle assembly is fixedly connected on the lower end of the injector body by the tight cap of a nozzle.
Further, an intermediate guide rod is combined on the inner cavity top of the injector body；The upper end of the intermediate guide rod
It is connect with the lower end of screw press, turns screw press and be able to drive intermediate guide rod and move up or down；
The middle part of the intermediate guide rod is equipped with one for the via hole that the high pressure pipe assembly end passes through, the diameter of the via hole
Greater than the diameter of high pressure pipe assembly end；
The top of the intermediate guide rod is equipped with a limiting slot, and a stop screw is screwed into institute from the radial direction on the injector body top
It states in limiting slot, to limit the position of intermediate guide rod.
Further, a mandril, middle part are combined with equipped with a pressure spring in the inner cavity lower part of the injector body；It is described
The upper end of pressure spring and the lower end of the intermediate guide rod abut, lower end and the upper end of the mandril abut；Under the mandril
The upper end of end and the valve rod of the nozzle assembly tight against.
Further, the diameter of the valve rod is 8~φ of φ 11mm, and stem lift is 1.2~1.6mm, cracking pressure 42
~48MPa.
Beneficial effects of the present invention:
(1) be 600~900 r/min especially suitable for revolving speed, single cylinder rated power is 350~420kW, cylinder diameter be φ 300~
The main fuel jet system of φ 340mm, the dual fuel engine that stroke is 380~450mm.
(2) since nozzle assembly is split type structure, the valve stem seal conical surface reduces couple thermic load far from cylinder, prevents
Stopping seat face is because high temperature is deformed, to extend the service life of nozzle assembly.
(3) since valve rod and valve-rod body use conical surface seal, and have in the radial direction of valve rod and nozzle and sealed at two, to subtract
The small quantity of fuel leakage of fuel injector spray orifice, reduces the carbon deposit at nozzle.
(4) high pressure fuel feed hole is connected inside injector body since high pressure pipe assembly protrudes into, be more advantageous to high pressure fuel
Sealing.
(5) since fuel injector top design is screw rod pressure adjusting structure, facilitate adjusting injection pressure of injector, while using limit
Position screw limits the extreme displacement of intermediate guide rod, reliable and stable.
(6) injector body oil return hole is communicated with intermediate guide rod oil return hole, the leakage fuel oil of low pressure chamber in injector body
Oil injector body oil return hole is flowed by the oil return hole of intermediate guide rod, eventually passes back to low pressure pipe.
Detailed description of the invention
Fig. 1 is appearance schematic diagram of the invention；
Fig. 2 is structural schematic diagram of the invention；
Fig. 3 is nozzle assembly structural schematic diagram of the invention.
In figure: 1-screw press, 2-locking nuts, 3-intermediate guide rods, 4-stop screws, 5-injector bodies,
6-mandrils, 7-pressure springs, 8-nozzle assemblies, the tight cap of 9-nozzles, 10-high pressure pipe assemblies；81-valve-rod bodies, 82-
Valve rod, 83-nozzles, 84-positioning pins.
Specific embodiment
The invention will be further described with reference to the accompanying drawing.
A kind of medium-speed engine double fuel fuel injector shown in referring to figure 1, figure 2 and figure 3, including injector body 5, it is special
Sign is: a screw press 1 is cooperatively connected with 5 threaded upper ends of injector body, and is locked by a locking nut 2；
One high pressure pipe assembly 10 is cooperatively connected with 5 upper vertical of injector body；The high pressure pipe assembly and the spray
Oil input channel is connected in oily device ontology 5；
One nozzle assembly 8 is located at the lower end of the injector body 5.
The nozzle assembly 8 is separate structure, by valve-rod body 81, the nozzle docked by a positioning pin 84 with valve-rod body 81
83, the valve rod 82 cooperated with valve-rod body 81 and 83 inner cavity of nozzle is constituted；In the valve-rod body 81 be equipped with in injector body 5
Oil input channel connection oil spout road；The nozzle assembly 8 is fixedly connected on the injector body by the tight cap 9 of a nozzle
5 lower end.Since the valve stem seal conical surface is far from cylinder, burn natural gas when, reduce couple thermic load, prevent seat surface because of high temperature
It is deformed, to extend the service life of nozzle assembly.
An intermediate guide rod 3 is combined on the inner cavity top of the injector body 5；The upper end of the intermediate guide rod 3 and tune
The lower end connection for pressing screw rod 1, turns screw press and is able to drive intermediate guide rod and move up or down, to adjust opening for fuel injector
Open pressure.
The middle part of the intermediate guide rod 3 is equipped with one for the via hole that 10 end of high pressure pipe assembly passes through, the mistake
The diameter in hole is greater than the diameter of 10 end of high pressure pipe assembly, to guarantee to move up and down Shi Buyu high-pressure oil pipe group in intermediate guide rod
Part interferes.
The top of the intermediate guide rod 3 is equipped with a limiting slot, diameter of the stop screw 4 from 5 top of injector body
To being screwed into the limiting slot, to limit the position of intermediate guide rod.
A mandril 6, middle part are combined with equipped with a pressure spring 7 in the inner cavity lower part of the injector body 5；The pressure regulation
The upper end of spring 7 and the lower end of the intermediate guide rod 3 abut, lower end and the upper end of the mandril 6 abut；Under the mandril 6
The upper end of end and the valve rod 82 of the nozzle assembly 8 tight against.
The cracking pressure of fuel injector is realized by adjusting the screw press of upper end.Turn screw rod, the position of intermediate guide rod
It moves up and down and adjusts pressure spring compression height, the pretightning force of pressure spring changes, and valve rod opens the pressure being subject to also phase
It should change.
The diameter of the valve rod 82 be 8~φ of φ 11mm, stem lift be 1.2~1.6mm, cracking pressure be 42~
48MPa。
When work, high pressure fuel is inputted in injector body by high pressure pipe assembly, fills couple sealing cone in
Between oil holding slot between guide rod.When fuel pressure reaches valve rod cracking pressure, valve rod overcomes the elastic force of pressure spring to increase, valve
Bar is detached from valve rod body cone, and valve rod opens spray orifice, and fuel oil is injected in cylinder by nozzle.When high pressure fuel fuel cut-off
When, oil holding slot and oil storage cavity pressure drop, valve rod are fallen back on valve-rod body seat surface, and valve rod lower end seals spray orifice, stops to combustion
It burns room and sprays fuel oil.
Claims (5)
1. a kind of medium-speed engine double fuel fuel injector, including injector body (5), it is characterized in that: a screw press (1) and institute
The mating connection of injector body (5) threaded upper ends is stated, and is locked by a locking nut (2)；
One high pressure pipe assembly (10) and the injector body (5) upper vertical are cooperatively connected；The high pressure pipe assembly and institute
State the interior oil input channel connection of injector body (5)；
One nozzle assembly (8) is located at the lower end of the injector body (5).
2. medium-speed engine double fuel fuel injector according to claim 1, it is characterized in that: the nozzle assembly (8) is point
Body structure, the nozzle (83) docked by valve-rod body (81), by a positioning pin (84) with valve-rod body (81) and valve-rod body (81) and
The valve rod (82) of nozzle (83) inner cavity cooperation is constituted；It is equipped in the valve-rod body (81) and the oil inlet in injector body (5)
The oil spout road of road connection；The nozzle assembly (8) is fixedly connected on the injector body by the tight cap of a nozzle (9)
(5) lower end.
3. medium-speed engine double fuel fuel injector according to claim 1 or 2, it is characterized in that: in the injector body
(5) inner cavity top is combined with an intermediate guide rod (3)；The upper end of the intermediate guide rod (3) and the lower end of screw press (1) connect
It connects, turns screw press and be able to drive intermediate guide rod and move up or down；
The middle part of the intermediate guide rod (3) is equipped with one for the via hole that the high pressure pipe assembly (10) end passes through, the mistake
The diameter in hole is greater than the diameter of high pressure pipe assembly (10) end；
The top of the intermediate guide rod (3) is equipped with a limiting slot, and a stop screw (4) is from the injector body (5) top
Radial direction is screwed into the limiting slot, to limit the position of intermediate guide rod.
4. medium-speed engine double fuel fuel injector according to claim 2, it is characterized in that: in the injector body (5)
Inner cavity lower part be combined with a mandril (6), middle part be equipped with a pressure spring (7)；The upper end of the pressure spring (7) and it is described in
Between guide rod (3) lower end abut, lower end and the upper end of the mandril (6) abut；The lower end of the mandril (6) and the nozzle sets
The upper end of the valve rod (82) of part (8) tight against.
5. medium-speed engine double fuel fuel injector according to claim 4, it is characterized in that: the diameter of the valve rod (82) is
φ 8~φ 11mm, stem lift are 1.2~1.6mm, and cracking pressure is 42~48MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811632656.XA CN109681348A (en) | 2018-12-29 | 2018-12-29 | A kind of medium-speed engine double fuel fuel injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811632656.XA CN109681348A (en) | 2018-12-29 | 2018-12-29 | A kind of medium-speed engine double fuel fuel injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109681348A true CN109681348A (en) | 2019-04-26 |
Family
ID=66191065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811632656.XA Pending CN109681348A (en) | 2018-12-29 | 2018-12-29 | A kind of medium-speed engine double fuel fuel injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109681348A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113279885A (en) * | 2021-06-17 | 2021-08-20 | 江苏八方动力机械有限公司 | Novel oil sprayer |
| CN113586232A (en) * | 2021-08-29 | 2021-11-02 | 淄柴机器有限公司 | Marine medium-high speed oil-gas double-electric control dual-fuel engine |
| CN114033593A (en) * | 2021-11-02 | 2022-02-11 | 上海中船三井造船柴油机有限公司 | Integrated oil sprayer device of dual-fuel low-speed diesel engine |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63198773A (en) * | 1987-02-10 | 1988-08-17 | Mazda Motor Corp | Fuel injection nozzle for diesel engine |
| JPH10318094A (en) * | 1997-05-19 | 1998-12-02 | Denso Corp | Fuel injection nozzle |
| JP2004257365A (en) * | 2003-02-27 | 2004-09-16 | Denso Corp | Fuel injection nozzle |
| CN201513272U (en) * | 2009-09-18 | 2010-06-23 | 广东力源液压机械有限公司 | Pressure regulating type oil injection nozzle |
| CN202203015U (en) * | 2011-08-23 | 2012-04-25 | 山东菏泽华星油泵油嘴有限公司 | Novel fuel injector assembly |
| CN204200438U (en) * | 2014-07-27 | 2015-03-11 | 山西潞安环保能源开发股份有限公司 | Self adaption double fuel oil sprayer |
| CN204299754U (en) * | 2014-12-03 | 2015-04-29 | 重庆红江机械有限责任公司 | A kind of electric-controlled fuel injector of radial oil-feed |
-
2018
- 2018-12-29 CN CN201811632656.XA patent/CN109681348A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63198773A (en) * | 1987-02-10 | 1988-08-17 | Mazda Motor Corp | Fuel injection nozzle for diesel engine |
| JPH10318094A (en) * | 1997-05-19 | 1998-12-02 | Denso Corp | Fuel injection nozzle |
| JP2004257365A (en) * | 2003-02-27 | 2004-09-16 | Denso Corp | Fuel injection nozzle |
| CN201513272U (en) * | 2009-09-18 | 2010-06-23 | 广东力源液压机械有限公司 | Pressure regulating type oil injection nozzle |
| CN202203015U (en) * | 2011-08-23 | 2012-04-25 | 山东菏泽华星油泵油嘴有限公司 | Novel fuel injector assembly |
| CN204200438U (en) * | 2014-07-27 | 2015-03-11 | 山西潞安环保能源开发股份有限公司 | Self adaption double fuel oil sprayer |
| CN204299754U (en) * | 2014-12-03 | 2015-04-29 | 重庆红江机械有限责任公司 | A kind of electric-controlled fuel injector of radial oil-feed |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113279885A (en) * | 2021-06-17 | 2021-08-20 | 江苏八方动力机械有限公司 | Novel oil sprayer |
| CN113586232A (en) * | 2021-08-29 | 2021-11-02 | 淄柴机器有限公司 | Marine medium-high speed oil-gas double-electric control dual-fuel engine |
| CN114033593A (en) * | 2021-11-02 | 2022-02-11 | 上海中船三井造船柴油机有限公司 | Integrated oil sprayer device of dual-fuel low-speed diesel engine |
| CN114033593B (en) * | 2021-11-02 | 2024-04-05 | 上海中船三井造船柴油机有限公司 | Integrated fuel injector device of dual-fuel low-speed diesel engine |
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| PB01 | Publication | ||
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Application publication date: 20190426 |