CN212296685U

CN212296685U - Dual-fuel internal combustion engine partition combustion structure

Info

Publication number: CN212296685U
Application number: CN202021207638.XU
Authority: CN
Inventors: 张建明; 姬广存
Original assignee: Yingjia Power Technology Wuxi Co ltd
Current assignee: Yingjia Power Technology Wuxi Co ltd
Priority date: 2020-06-28
Filing date: 2020-06-28
Publication date: 2021-01-05
Anticipated expiration: 2030-06-28

Abstract

The utility model discloses a dual fuel internal-combustion engine subregion combustion structure, including sprayer and combustion chamber, the sprayer is installed on combustion chamber upper portion, the sprayer lower extreme is equipped with the nozzle part of arranging the inside top of combustion chamber in, nozzle part mainly comprises needle valve, pneumatic valve and valve body, in the pneumatic valve was arranged in to the needle valve, just be equipped with diesel oil inlet channel and diesel oil pressure chamber between needle valve and the pneumatic valve, be equipped with natural gas inlet channel and natural gas pressure chamber between valve body and the pneumatic valve. The utility model relates to a combustion mode of internal-combustion engine, in particular to dual-fuel internal-combustion engine subregion burning structure belongs to internal-combustion engine technical field. The utility model ensures the normal ignition and combustion of the dual-fuel internal combustion engine, and is convenient for combustion control; the utility model simplifies the structural design of the nozzle component, optimizes the processing technology, reduces the processing difficulty of the components, improves the product percent of pass and reduces the production cost; the utility model provides a subregion combustion method for the ejector can carry out whole compactification design, optimizes the product structure.

Description

Dual-fuel internal combustion engine partition combustion structure

Technical Field

The utility model relates to a combustion mode of internal-combustion engine, in particular to dual-fuel internal-combustion engine subregion burning structure belongs to internal-combustion engine technical field.

Background

With the gradual upgrade of emission standards, the traditional internal combustion engine using gasoline and diesel oil as combustion media is more and more difficult to meet the requirements of future combustion technologies. Along with the adjustment of national energy structures, available internal combustion engine fuels are gradually diversified, and the available internal combustion engine fuels comprise a plurality of clean fuels such as natural gas, liquefied petroleum gas, methanol and the like. The diesel-fueled internal combustion engine burns diesel oil by compression ignition, has the advantages of high compression ratio, high thermal efficiency, high torque output and the like, and clean fuels such as natural gas, liquefied petroleum gas, methanol and the like are not easy to be subjected to compression ignition. In order to fully exert the advantages of diesel and clean fuel, a plurality of dual-fuel direct injection technologies are developed, namely, a certain amount of diesel is firstly injected into a combustion chamber of an internal combustion engine, then the clean fuel is injected into the combustion chamber, the diesel can self-ignite after being injected into the combustion chamber to form a self-ignition area, and the injected fuel can be ignited if being injected into the self-ignition area, so that the combustion work of the internal combustion engine is realized.

The quantity of the diesel oil sprayed into the combustion chamber is small, and the diesel oil is mainly used for igniting, but the vortex intensity in the combustion chamber of the internal combustion engine is different, the relative angles of the diesel oil spray holes and the clean fuel spray holes are different, and the spontaneous combustion area is changed. In the current dual-fuel internal combustion engine technology, the adopted technical method is to fix the relative angle of the diesel oil spray hole and the clean fuel spray hole, so that the diesel oil spray hole and the clean fuel spray hole are not on the same spray track, and the compression ignition diesel oil is prevented from being blown out. However, the overall structural design of the internal combustion engine is very compact, the space for installing the injector is very small, the structural design for fixing the diesel injection hole and cleaning the fuel injection hole can lead the wall thickness of the injector nozzle to be thinner, the parts are difficult to process, the working reliability is poor, the overall size of the injector is larger, the reasonable and compact design cannot be carried out, and certain difficulty is caused in the installation of the internal combustion engine.

In order to avoid the phenomenon that compression ignition diesel is blown out, reduce the design and processing difficulty of parts and reasonably and compactly design an injector structure, a partition combustion method of a dual-fuel internal combustion engine is needed to solve the problem.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a dual fuel internal-combustion engine subregion burning structure to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a dual-fuel internal-combustion engine subregion combustion structure, includes sprayer and combustion chamber, the sprayer is installed on combustion chamber upper portion, the sprayer lower extreme is equipped with the nozzle part of arranging the inside top of combustion chamber in, nozzle part mainly comprises needle valve, pneumatic valve and valve body, the needle valve is arranged in the pneumatic valve, just be equipped with diesel oil inlet channel and diesel oil pressure chamber between needle valve and the pneumatic valve, the needle valve lower extreme is arranged in to the diesel oil pressure chamber, be equipped with the needle valve seal face of arranging diesel oil inlet channel lower extreme in between needle valve and the pneumatic valve, the pneumatic valve is arranged in the valve body, just be equipped with natural gas inlet channel between pneumatic valve and the valve body, be equipped with the pneumatic valve seal face of arranging natural gas inlet channel lower extreme in between pneumatic valve and the valve body, the activity is pegged graft end department under, the lower end of the air valve is provided with a plurality of oil injection holes communicated with the diesel pressure chamber, and the lower end of the valve body is provided with a plurality of gas injection holes communicated with the natural gas pressure chamber.

As a preferred technical scheme of the utility model, the fumarole sprays the gas beam, the fuel-spray orifice sprays the oil beam, there is the greatest common divisor between fuel-spray orifice total amount and the fumarole total amount, divide into the combustion area of corresponding quantity in with the combustion chamber according to the greatest common divisor numerical value, in every combustion area, the gas beam has the same quantity with the oil beam, and can not carry out the integer between gas beam total amount and the oil beam total amount and remove.

As an optimized technical scheme of the utility model, the gas beam sprays the region and can not cover the oil beam completely and spray the region, and the oil beam can carry out the spontaneous combustion in the combustion chamber.

As an optimized technical scheme of the utility model, fumarole and nozzle opening arrange with certain angle with nozzle part center, and are the annular respectively and distribute at valve body and valve head position.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model ensures the normal ignition and combustion of the dual-fuel internal combustion engine, and is convenient for combustion control;

the utility model simplifies the structural design of the nozzle component, optimizes the processing technology, reduces the processing difficulty of the components, improves the product percent of pass and reduces the production cost;

the utility model provides a subregion combustion method for the ejector can carry out whole compactification design, optimizes the product structure.

Drawings

FIG. 1 is a schematic structural view of a nozzle member;

FIG. 2 is a schematic illustration of a zone distribution of a zone by zone combustion process;

FIG. 3 is a schematic diagram of the zone distribution of a zone two combustion method;

FIG. 4 is a schematic view of a three zone profile for a zone combustion process;

FIG. 5 is a schematic diagram of a four zone distribution of a zone combustion process;

FIG. 6 is a schematic diagram of a five zone distribution of a zone combustion process;

FIG. 7 is a schematic diagram of a six-zone distribution of a zone-by-zone combustion method;

FIG. 8 is a schematic diagram of a seven zone distribution of a zone combustion process;

FIG. 9 is a schematic diagram of eight zones of a zone combustion method;

FIG. 10 is a schematic diagram of a nine-zone distribution in a zone combustion process.

In the figure: 01. the fuel injection valve comprises a needle valve body, 02, a gas valve, 03, a valve body, 04, a natural gas inlet channel, 05, a diesel oil inlet channel, 06, a gas valve sealing surface, 07, a needle valve sealing surface, 08, a natural gas pressure chamber, 09, a gas injection hole, 10, a diesel oil pressure chamber, 11, an oil injection hole, 12, a nozzle component, 13, a gas beam, 14, an oil beam, 15 and a combustion chamber.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to the drawings in the figures 1-10,

the utility model discloses in, the fuel that ignites of dual-fuel internal-combustion engine is diesel oil, and the clean fuel that carries out main burning can be the fuel of multiple forms such as natural gas, liquefied petroleum gas, methane gas, ethane gas, methyl alcohol, and this paper is for stating conveniently, and the clean fuel of following content uses the natural gas to describe as the representative.

The utility model provides a dual-fuel internal combustion engine subregion combustion structure, including sprayer and combustion chamber 15, the sprayer is installed on combustion chamber 15 upper portion, the sprayer lower extreme is equipped with the nozzle part 12 of arranging the inside top of combustion chamber 15 in, nozzle part 12 mainly comprises needle valve 01, pneumatic valve 02 and valve body 03, needle valve 01 arranges in pneumatic valve 02, and be equipped with diesel oil inlet passageway 05 and diesel oil pressure chamber 10 between needle valve 01 and the pneumatic valve 02, diesel oil pressure chamber 10 arranges in the lower extreme of needle valve 01, be equipped with the needle valve sealed face 07 of arranging in diesel oil inlet passageway 05 lower extreme between needle valve 01 and the pneumatic valve 02, pneumatic valve 02 arranges in valve body 03, and be equipped with natural gas inlet passageway 04 between pneumatic valve 02 and the valve body 03, be equipped with the pneumatic valve sealed face 06 of arranging in natural gas inlet passageway 04 lower extreme between pneumatic valve 02 and the valve body 03, be equipped with the natural gas, the lower end of the air valve 02 is movably inserted at the lower end of the valve body 03, a plurality of oil spraying holes 11 communicated with the diesel pressure chamber 10 are formed in the lower end of the air valve 02, a plurality of air spraying holes 09 communicated with the natural gas pressure chamber 08 are formed in the lower end of the valve body 03, the air spraying holes 09 and the oil spraying holes 11 are obliquely arranged and are respectively distributed at the ends of the valve body 03 and the air valve 02 in an annular mode, and the air spraying holes 09 are arranged above the oil spraying holes 11.

The fuel oil burner is characterized in that the gas jet holes 09 jet the gas beams 13, the fuel oil jet holes 11 jet the oil beams 14, a maximum common divisor exists between the total number of the fuel oil jet holes 11 and the total number of the fuel oil jet holes 09, the combustion chamber 15 is divided into combustion areas with corresponding numbers according to the maximum common divisor, the gas beams 13 and the oil beams 14 in each combustion area have the same number, the total number of the gas beams 13 and the total number of the oil beams 14 cannot be divided, the injection area of the gas beams 13 cannot completely cover the injection area of the oil beams 14, and the oil beams 14 can be spontaneously combusted in the combustion chamber 15.

When the injector control needle valve 01 moves upwards, when the needle valve 01 is separated from a needle valve sealing surface 07, the needle valve 01 is opened, a diesel oil inlet channel 05 is communicated with a diesel oil pressure chamber 10, diesel oil is sprayed to a combustion chamber 15 through an oil spraying hole 11 to form an oil beam 14 when being sprayed, the injector control air valve 02 moves upwards, when the air valve 02 is separated from an air valve sealing surface 06, the air valve 02 is opened, a natural gas inlet channel 04 is communicated with a natural gas pressure chamber 08, natural gas is sprayed to the combustion chamber 15 through an air spraying hole 09 to form an air beam 13 when being sprayed.

When the needle valve 01 is opened, the oil bundle 14 injected into the combustion chamber 15 is gasified and spontaneously combusted in the combustion chamber 15 to form an autoignition region, then the air valve 02 is opened, the air bundle 13 injected into the combustion chamber 15 starts to combust under the ignition of the oil bundle 14 in the autoignition region, so that the combustion work of the engine is realized, the fuel proportion of the oil bundle 14 injected into the combustion chamber 15 is small, the fuel proportion of the air bundle 13 injected into the combustion chamber 15 is large, when the air bundle 13 is injected into the combustion chamber 15 from an injector, the air pressure is changed from a high-pressure state to a low-pressure state to absorb heat, and if the area of the air bundle 13 covers most or even all of the area of the oil bundle 14, the temperature of the autoignition region of the oil bundle 14 is reduced by the heat absorption of the gas expansion, so that the oil bundle 14 and the air bundle 13 can not reach; the utility model discloses in, adopt the subregion combustion method, there is the greatest common divisor between 11 quantity of nozzle opening and the nozzle opening 09 quantity promptly, according to the greatest common divisor numerical value, divide into the combustion area of corresponding quantity with combustion chamber 15, in every combustion area, 14 quantity of the same oil beam and 13 quantity of air beam have, and can not remove entirely between 14 total quantity of oil beam and the 13 total quantity of air beam, in nozzle part 12 of needle valve 01 and air valve 02, need not to form fixed angle between 01 and the air valve 02, through the design of nozzle opening 11 and nozzle opening 09 quantity, 13 regions can not cover 14 regions of oil beam completely in the control air beam, ensure that diesel oil can normally spontaneous combustion, thereby ignite the burning of whole fuel, make the engine normally burn and do work.

Embodiments of different partitions will be described below:

in the first embodiment, the greatest common divisor of the number of the oil spray holes 11 and the number of the air spray holes 09 is 1, the combustion chamber 15 is divided into one region, the first divisional combustion method is shown in fig. 2, in the schematic diagram, the number of the oil spray holes 11 is 9, the number of the air spray holes 09 is 13, in each positional relationship between the needle valve 01 and the gas valve 02, the spontaneous combustion and the ignition of the corresponding oil bundle 14 region can be realized, and the first divisional combustion method further comprises a combination form in which the greatest common divisor of the number of the oil spray holes 11 and the number of the air spray holes 09 is 1.

In the second embodiment, the greatest common divisor of the number of the oil spray holes 11 and the number of the air spray holes 09 is 2, the combustion chamber 15 is divided into two zones, the second zone combustion method is shown in fig. 3, in the schematic diagram, the number of the oil spray holes 11 is 10, the number of the air spray holes 09 is 14, the number of the oil spray holes 11 in each zone is 5, and the number of the air spray holes 09 is 7, in each positional relationship between the needle valve 01 and the gas valve 02, spontaneous combustion and ignition in the corresponding area of the oil spray 14 can be realized, and the second zone combustion method further includes a combination form of the greatest common divisor of the number of the oil spray holes 11 and the number of the air spray holes 09 is 2.

In the third embodiment, the greatest common divisor of the number of the oil spray holes 11 and the number of the air spray holes 09 is 3, the combustion chamber 15 is divided into three zones, the three zones in the zoned combustion method are shown in fig. 4, in the schematic view, the number of the oil spray holes 11 is 9, the number of the air spray holes 09 is 12, the number of the oil spray holes 11 in each zone is 3, and the number of the air spray holes 09 is 4, so that spontaneous combustion and ignition in the corresponding oil bundle 14 zone can be realized in each positional relationship between the needle valve 01 and the air valve 02, and the three-zone combustion method further comprises a combination form of the greatest common divisor of the number of the oil spray holes 11 and the number of the air spray.

In the fourth embodiment, the greatest common divisor of the number of the oil spray holes 11 and the number of the air spray holes 09 is 4, the combustion chamber 15 is divided into four zones, the partition combustion method is shown in fig. 5, in the schematic diagram, the number of the oil spray holes 11 is 8, the number of the air spray holes 09 is 12, the number of the oil spray holes 11 in each partition is 2, and the number of the air spray holes 09 is 3, in each positional relationship between the needle valve 01 and the gas valve 02, spontaneous combustion and ignition in the corresponding oil bundle 14 region can be realized, and the four-zone combustion method further includes a combination form of the greatest common divisor of the number of the oil spray holes 11 and the number of the air spray holes 09 being 4.

In the fifth embodiment, the greatest common divisor of the number of the oil spray holes 11 and the number of the air spray holes 09 is 5, the combustion chamber 15 is divided into five zones, fig. 6 is shown in the fifth distribution of the zoned combustion method, in the schematic view, the number of the oil spray holes 11 is 10, the number of the air spray holes 09 is 15, the number of the oil spray holes 11 in each zone is 2, and the number of the air spray holes 09 is 3, and in each positional relationship between the needle valve 01 and the gas valve 02, spontaneous combustion and ignition in the corresponding oil bundle 14 region can be realized, and the five-zone combustion method further includes a combination form of the greatest common divisor of the number of the oil spray holes 11 and the number of the air spray holes 09 being.

In the sixth embodiment, the greatest common divisor of the number of the oil spray holes 11 and the number of the air spray holes 09 is 6, the combustion chamber 15 is divided into six zones, fig. 7 is shown in the sixth division of the zoned combustion method, in the schematic view, the number of the oil spray holes 11 is 12, the number of the air spray holes 09 is 18, the number of the oil spray holes 11 in each zone is 2, and the number of the air spray holes 09 is 3, and in each positional relationship between the needle valve 01 and the gas valve 02, spontaneous combustion and ignition in the corresponding oil bundle 14 region can be realized, and the six-zone combustion method further includes other combinations of the greatest common divisor of the number of the oil spray holes 11 and the number of the air spray holes 09 is 6.

In the seventh embodiment, the greatest common divisor of the number of the oil spray holes 11 and the number of the air spray holes 09 is 7, the combustion chamber 15 is divided into seven zones, the seventh zone combustion method is shown in fig. 8, in the schematic diagram, the number of the oil spray holes 11 is 14, the number of the air spray holes 09 is 21, the number of the oil spray holes 11 in each zone is 2, and the number of the air spray holes 09 is 3, in each positional relationship between the needle valve 01 and the gas valve 02, the spontaneous combustion and the ignition in the corresponding area of the oil spray 14 can be realized, and the seventh zone combustion method further comprises other combination forms that the greatest common divisor of the number of the oil spray holes 11 and the number of the air spray holes 09 is 7.

In the eighth embodiment, the greatest common divisor of the number of the oil spray holes 11 and the number of the air spray holes 09 is 8, the combustion chamber 15 is divided into eight regions, fig. 9 is shown in the eighth division of the zoned combustion method, in the schematic view, the number of the oil spray holes 11 is 16, the number of the air spray holes 09 is 24, the number of the oil spray holes 11 in each zone is 2, and the number of the air spray holes 09 is 3, and in each positional relationship between the needle valve 01 and the gas valve 02, spontaneous combustion and ignition in the corresponding oil bundle 14 region can be realized, and the eight region combustion method further includes other combinations of the greatest common divisor of the number of the oil spray holes 11 and the number of the air spray holes 09 is 8.

In the ninth embodiment, the greatest common divisor of the number of the oil spray holes 11 and the number of the air spray holes 09 is 9, the combustion chamber 15 is divided into nine zones, and the ninth zone combustion method is shown in fig. 8, in which the number of the oil spray holes 11 is 18, the number of the air spray holes 09 is 27, the number of the oil spray holes 11 in each zone is 2, and the number of the air spray holes 09 is 3, so that the spontaneous combustion and the ignition in the corresponding oil bundle 14 zone can be realized in each positional relationship between the needle valve 01 and the gas valve 02, and the nine zone combustion method further includes other combination forms in which the greatest common divisor of the number of the oil spray holes 11 and the number of the air spray holes 09 is 9.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a dual-fuel internal combustion engine subregion combustion structure, includes sprayer and combustion chamber (15), its characterized in that, the sprayer is installed on combustion chamber (15) upper portion, the sprayer lower extreme is equipped with nozzle part (12) of arranging combustion chamber (15) inside top in, nozzle part (12) mainly comprise needle valve (01), pneumatic valve (02) and valve body (03), in pneumatic valve (02) were arranged in needle valve (01), just be equipped with diesel oil inlet passage (05) and diesel oil pressure chamber (10) between needle valve (01) and pneumatic valve (02), needle valve (01) lower extreme is arranged in diesel oil pressure chamber (10), be equipped with between needle valve (01) and pneumatic valve (02) and arrange diesel oil inlet passage (05) lower extreme needle valve sealing face (07), in valve body (03) is arranged in pneumatic valve (02), just be equipped with natural gas inlet passage (04) between pneumatic valve (02) and valve body (03), an air valve sealing surface (06) arranged at the lower end of a natural gas inlet channel (04) is arranged between the air valve (02) and the valve body (03), a natural gas pressure chamber (08) arranged at the lower end of the air valve sealing surface (06) is arranged between the air valve (02) and the valve body (03), the lower end of the air valve (02) is movably inserted at the lower end of the valve body (03) from top to bottom, a plurality of oil injection holes (11) communicated with the diesel pressure chamber (10) are formed in the lower end of the air valve (02), and a plurality of air injection holes (09) communicated with the natural gas pressure chamber (08) are formed in the lower end of the valve body (03).

2. The split-combustion structure of a dual-fuel internal combustion engine according to claim 1, characterized in that: the gas jet holes (09) jet gas beams (13), the oil jet holes (11) jet oil beams (14), a greatest common divisor exists between the total number of the oil jet holes (11) and the total number of the gas jet holes (09), the combustion chamber (15) is divided into a corresponding number of combustion zones according to the greatest common divisor, the gas beams (13) and the oil beams (14) have the same number in each combustion zone, and the total number of the gas beams (13) and the total number of the oil beams (14) cannot be divided in an integer mode.

3. The split-combustion structure of a dual-fuel internal combustion engine according to claim 2, characterized in that: the jet area of the gas beam (13) can not completely cover the jet area of the oil beam (14), and the oil beam (14) can be subjected to self-ignition in the combustion chamber (15).

4. The split-combustion structure of a dual-fuel internal combustion engine according to claim 1, characterized in that: the air injection holes (09) and the oil injection holes (11) are arranged at a certain angle with the center of the nozzle component (12) and are respectively distributed at the head positions of the valve body (03) and the air valve (02) in an annular manner.