CN112502877A - Integrated pilot oil supply system for dual-fuel diesel engine and working method thereof - Google Patents
Integrated pilot oil supply system for dual-fuel diesel engine and working method thereof Download PDFInfo
- Publication number
- CN112502877A CN112502877A CN202011320024.7A CN202011320024A CN112502877A CN 112502877 A CN112502877 A CN 112502877A CN 202011320024 A CN202011320024 A CN 202011320024A CN 112502877 A CN112502877 A CN 112502877A
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- Prior art keywords
- pressure
- pilot oil
- pilot
- fuel
- oil supply
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- 239000000446 fuel Substances 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title abstract description 11
- 239000003921 oil Substances 0.000 claims abstract description 88
- 239000000295 fuel oil Substances 0.000 claims abstract description 30
- 230000009977 dual effect Effects 0.000 claims description 8
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000011017 operating method Methods 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000010759 marine diesel oil Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
Images
Classifications
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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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
- F02M55/025—Common rails
-
- 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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
-
- 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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The technical scheme of the invention discloses an integrated pilot oil supply system for a dual-fuel diesel engine and a working method thereof, wherein the integrated pilot oil supply system comprises a high-pressure fuel oil common rail pipe; the pilot fuel oil supply unit is fixed on the high-pressure fuel oil common rail pipe; the pilot oil supply unit delivers pilot oil to the pilot oil injectors of the cylinders through pipelines. The pilot fuel oil supply unit comprises a high-pressure distribution block fixed on a high-pressure fuel oil common rail pipe; one end of the pipeline is connected to the high-pressure distribution block; the other end of the pipeline is connected to the pilot oil injector; at least two pressure sensors are mounted on the high-pressure distribution block. The integrated pilot oil supply system can save the space occupied by the system in the design stage, greatly shorten the related pilot oil high-pressure pipe system, greatly reduce the component reduction, and greatly save the working hours when the system is installed. The operation reliability is improved, the production cost of the whole machine is reduced, and in the subsequent maintenance process, the related cost is greatly reduced due to the reduction of system component parts.
Description
Technical Field
The invention relates to the technical field of diesel engines, in particular to an integrated pilot oil supply system for a dual-fuel diesel engine and a working method thereof.
Background
Along with the requirements of various industries on energy conservation and emission reduction and the implementation of relevant specifications of the ship industry at present, the demand of the dual-fuel low-speed diesel engine is more and more large due to the environment-friendly characteristic of the dual-fuel low-speed diesel engine. When the dual-fuel low-speed diesel engine adopting the Otto cycle works in a fuel gas mode, a small amount of pilot oil needs to be sprayed into the pre-combustion chamber to pilot the gas fuel in the pre-combustion chamber and then the gas fuel is combusted and diffused into the whole combustion chamber. The pilot oil is typically marine diesel. With more and more ships using only low sulfur oil, the fuel in the high pressure fuel rail can also be used as a primer.
As shown in fig. 1, the conventional pilot oil system is that a pilot oil supply unit 1 is separately provided on a main engine, marine diesel oil is pumped out of a tank through an oil pump, reaches an inlet of the pilot oil supply unit through filtration and viscosity control, enters a protective filter in front of the pilot oil supply unit 1, is pressurized to a required working pressure through a pump driven by a motor in the pilot oil supply unit 1, and is delivered to a pilot oil injector 3 of each cylinder through a pilot oil high-pressure oil pipe 2. The whole system needs to be provided with a pilot oil supply pump, a pilot oil filter, a pilot oil viscosity control device, a pilot oil supply unit and a pilot oil high-pressure oil pipeline from the pilot oil supply unit to each cylinder pilot oil injector. The fuel oil guiding system is complex, long in pipeline, space-occupying and capable of increasing the manufacturing cost of the whole machine.
Disclosure of Invention
The invention aims to solve the problems that the existing low-speed diesel oil fuel-leading system for the dual-fuel ship is complex in system and long in high-pressure oil supply pipeline.
In order to solve the technical problem, the technical scheme of the invention provides an integrated pilot oil supply system for a dual-fuel diesel engine, which comprises:
a high pressure fuel common rail pipe;
the pilot fuel oil supply unit is fixed on the high-pressure fuel oil common rail pipe;
and the pilot oil supply unit is used for conveying pilot oil to the pilot oil injectors of the cylinders through pipelines.
Optionally, the pilot oil supply unit includes:
the high-pressure distribution block is fixed on the high-pressure fuel common rail pipe through a fastener;
one end of the pipeline is connected to the high-pressure distribution block;
the other end of the pipeline is connected to the pilot oil injector;
at least two pressure sensors are arranged on the high-pressure distribution block.
Optionally, the design pressure of the high pressure distribution block is 1050 bar.
Optionally, the pressure sensor includes an upper pressure sensor mounted on the upper portion of the high-pressure distribution block and a lower pressure sensor mounted on the lower portion of the high-pressure distribution block, and both the pressure sensors are used for monitoring the pressure of the pilot oil.
Optionally, the fastener is a bolt.
Optionally, the conduit is a pilot high pressure oil line.
In order to solve the technical problem, the technical solution of the present invention further provides a working method of the integrated pilot oil supply system for a dual-fuel diesel engine according to any one of the above, wherein the working method comprises:
the fuel oil is conveyed to the high-pressure fuel oil common rail pipe, then passes through the high-pressure distribution block, enters the pilot high-pressure fuel oil pipe after being distributed, and finally is conveyed to the pilot fuel oil injector.
The technical scheme of the invention has the beneficial effects that:
the integrated pilot oil supply system for the dual-fuel diesel engine can save the space occupied by the system in the design stage, the related pilot oil high-pressure pipe system can be greatly shortened, the component reduction is greatly reduced, and the working hour is greatly saved when the system is installed. The operation reliability is improved, the production cost of the whole machine is reduced, and in the subsequent maintenance process, the related cost is greatly reduced due to the reduction of system component parts.
Drawings
FIG. 1 is a schematic structural diagram of an integrated pilot oil supply system for a dual-fuel diesel engine in the prior art;
FIG. 2 is a schematic structural diagram of an integrated pilot oil supply system for a dual-fuel diesel engine according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a high-voltage distribution block in an embodiment of the invention.
The specific implementation mode is as follows:
the invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.
Referring to fig. 2 and 3, an integrated pilot oil supply system for a dual fuel diesel engine of an embodiment is shown, wherein a high pressure fuel common rail 4 is included; a pilot oil supply unit 5 fixed to the high-pressure fuel common rail pipe 4; the pilot oil supply unit 5 delivers pilot oil to the pilot oil injectors 3 of the respective cylinders through pipes.
In the present embodiment, the pilot fuel supply unit 5 includes a high-pressure distribution block 51 fixed to the high-pressure fuel common rail pipe 4 by a fastener; a pipe having one end connected to the high-pressure distribution block 51; the other end of the pipeline is connected to the pilot oil injector 3; at least two pressure sensors 6 are mounted on the high pressure distribution block 51.
In this embodiment, the design pressure of the high pressure distribution block 6 is 1050 bar.
In this embodiment, the pressure sensors 6 include an upper pressure sensor 61 mounted on the upper portion of the high-pressure distribution block 51 and a lower pressure sensor 62 mounted on the lower portion of the high-pressure distribution block 51, and both the pressure sensors 6 are used for monitoring the pressure of the pilot oil.
In this embodiment, the fasteners are bolts, but in other embodiments the fasteners are not limited to bolts and the conduit is pilot high pressure fuel line 2.
The features and functions of the present invention will be further understood from the following description.
The embodiment also provides a working method of the integrated pilot oil supply system for the dual-fuel diesel engine, wherein the working method comprises the steps that fuel oil is conveyed to the high-pressure fuel oil common rail pipe 4, then passes through the high-pressure distribution block 51, enters the pilot oil high-pressure oil pipe 2 after being distributed, and finally is conveyed to the pilot oil injector 3.
The following explains the integrated pilot oil supply system for the dual-fuel diesel engine of the present embodiment in detail:
the embodiment is an integrated pilot oil supply unit of a marine low-speed dual-fuel diesel engine, a high-pressure distribution block is arranged at the end part of a high-pressure fuel common rail pipe, the upper side and the lower side of the high-pressure distribution block are respectively provided with a sensing installation hole, the side edge of the high-pressure distribution block is provided with a high-pressure fuel pipe connecting hole (used for connecting a pilot high-pressure fuel pipe), two pressure sensors are arranged on the high-pressure distribution block and connected with the pilot oil high-pressure fuel pipe, then pilot oil is sent to pilot oil injectors of cylinders through the pilot oil high-pressure fuel pipe, and the pressure of the pilot oil can be monitored in real time by the sensors.
Namely, the integrated pilot oil supply unit consists of a high-pressure distribution block, two pressure sensors and a pilot oil high-pressure oil pipe. The high-pressure distribution block is designed to have pressure of 1050bar and is connected with a high-pressure fuel common rail pipe through a bolt, the high-pressure distribution block and the common rail pipe are sealed through a steel lip-shaped sealing ring, and the left side and the right side of the high-pressure distribution block are respectively provided with a pressure sensor. The pressure sensors are arranged on the upper side and the lower side of the high-pressure distribution block and used for monitoring the pressure of the pilot oil, and the two pressure sensors are in mutual backup relation, so that the monitoring reliability is provided. One end of the pilot fuel oil high-pressure oil pipe is connected to the high-pressure distribution block, and the other end of the pilot fuel oil high-pressure oil pipe is connected to the pilot fuel oil injector.
In the installation process of the low-speed dual-fuel marine diesel engine, the integrated pilot oil supply unit is installed.
The high-pressure distribution is tightly fixed at the end part of the high-pressure fuel common rail pipe through a bolt, a pressure sensor is arranged at the upper side of the high-pressure distribution pipe, a pressure sensor is arranged at the lower side of the high-pressure distribution pipe, the ignition high-pressure oil pipe is connected to the high-pressure distribution block, and then the ignition high-pressure oil pipe is connected with the ignition fuel oil injectors of the cylinders, so that the whole system. The fuel oil enters the fuel oil guiding system from the high-pressure fuel oil common rail pipe through the distribution block and the fuel oil high-pressure oil pipe, and finally enters the fuel oil guiding oil injectors of all cylinders to finish the transportation work of the fuel oil guiding.
In conclusion, the integrated pilot oil supply system for the dual-fuel diesel engine can save the space occupied by the system in the design stage, the related pilot oil high-pressure pipe system can be greatly shortened, the component reduction is greatly reduced, and the working hour is greatly saved when the system is installed. The operation reliability is improved, the production cost of the whole machine is reduced, and in the subsequent maintenance process, the related cost is greatly reduced due to the reduction of system component parts.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (7)
1. The utility model provides a dual fuel is integrated form pilot oil feeding system for diesel engine which characterized in that includes:
a high pressure fuel common rail pipe;
the pilot fuel oil supply unit is fixed on the high-pressure fuel oil common rail pipe;
and the pilot oil supply unit is used for conveying pilot oil to the pilot oil injectors of the cylinders through pipelines.
2. The integrated pilot oil supply system for a dual fuel diesel of claim 1, wherein the pilot oil supply unit comprises:
the high-pressure distribution block is fixed on the high-pressure fuel common rail pipe through a fastener;
one end of the pipeline is connected to the high-pressure distribution block;
the other end of the pipeline is connected to the pilot oil injector;
at least two pressure sensors are arranged on the high-pressure distribution block.
3. The integrated pilot oil supply system for a dual fuel diesel of claim 2 wherein the design pressure of the high pressure distribution block is 1050 bar.
4. The integrated pilot oil supply system for dual fuel diesel engines of claim 2, wherein the pressure sensors include an upper pressure sensor mounted on an upper portion of the high pressure distribution block and a lower pressure sensor mounted on a lower portion of the high pressure distribution block, both of the pressure sensors being used for monitoring the pressure of the pilot oil.
5. The integrated pilot oil supply system for a dual fuel diesel of claim 2 wherein the fasteners are bolts.
6. The integrated pilot oil supply system for dual fuel diesel of claim 1 wherein the conduit is a pilot high pressure fuel line.
7. An operating method of an integrated pilot oil supply system for a dual fuel diesel engine according to any one of claims 1 to 6, characterized in that the operating method is as follows:
the fuel oil is conveyed to the high-pressure fuel oil common rail pipe, then passes through the high-pressure distribution block, enters the pilot high-pressure fuel oil pipe after being distributed, and finally is conveyed to the pilot fuel oil injector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011320024.7A CN112502877A (en) | 2020-11-23 | 2020-11-23 | Integrated pilot oil supply system for dual-fuel diesel engine and working method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011320024.7A CN112502877A (en) | 2020-11-23 | 2020-11-23 | Integrated pilot oil supply system for dual-fuel diesel engine and working method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112502877A true CN112502877A (en) | 2021-03-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011320024.7A Pending CN112502877A (en) | 2020-11-23 | 2020-11-23 | Integrated pilot oil supply system for dual-fuel diesel engine and working method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112502877A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103982308A (en) * | 2014-05-06 | 2014-08-13 | 南京盖驰动力科技有限公司 | Control system and control method of oil/gas dual-fuel engine in electronic control oil supply |
| CN108368783A (en) * | 2015-12-23 | 2018-08-03 | 瓦锡兰芬兰有限公司 | Method and piston engine for operated piston engine |
| CN208441950U (en) * | 2018-06-19 | 2019-01-29 | 潍柴动力股份有限公司 | Common rail fuel combustion system |
| CN109915266A (en) * | 2019-04-26 | 2019-06-21 | 上海海事大学 | A kind of dual-fuel engine combustion system peculiar to vessel and method |
| CN210141181U (en) * | 2019-07-16 | 2020-03-13 | 中国石油天然气集团有限公司 | Fuel distribution system for common rail engine |
| CN111472891A (en) * | 2020-04-26 | 2020-07-31 | 昆明理工大学 | Diesel ignition natural gas engine combustion system and control method thereof |
| CN111954757A (en) * | 2018-03-02 | 2020-11-17 | Mtu 腓特烈港有限责任公司 | Distributor device of common rail system |
| CN214464612U (en) * | 2020-11-23 | 2021-10-22 | 沪东重机有限公司 | Integrated pilot oil supply system for dual-fuel diesel engine |
-
2020
- 2020-11-23 CN CN202011320024.7A patent/CN112502877A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103982308A (en) * | 2014-05-06 | 2014-08-13 | 南京盖驰动力科技有限公司 | Control system and control method of oil/gas dual-fuel engine in electronic control oil supply |
| CN108368783A (en) * | 2015-12-23 | 2018-08-03 | 瓦锡兰芬兰有限公司 | Method and piston engine for operated piston engine |
| CN111954757A (en) * | 2018-03-02 | 2020-11-17 | Mtu 腓特烈港有限责任公司 | Distributor device of common rail system |
| CN208441950U (en) * | 2018-06-19 | 2019-01-29 | 潍柴动力股份有限公司 | Common rail fuel combustion system |
| CN109915266A (en) * | 2019-04-26 | 2019-06-21 | 上海海事大学 | A kind of dual-fuel engine combustion system peculiar to vessel and method |
| CN210141181U (en) * | 2019-07-16 | 2020-03-13 | 中国石油天然气集团有限公司 | Fuel distribution system for common rail engine |
| CN111472891A (en) * | 2020-04-26 | 2020-07-31 | 昆明理工大学 | Diesel ignition natural gas engine combustion system and control method thereof |
| CN214464612U (en) * | 2020-11-23 | 2021-10-22 | 沪东重机有限公司 | Integrated pilot oil supply system for dual-fuel diesel engine |
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Application publication date: 20210316 |