CN109441685B - High-pressure common rail system of marine low-speed machine - Google Patents
High-pressure common rail system of marine low-speed machine Download PDFInfo
- Publication number
- CN109441685B CN109441685B CN201811273160.8A CN201811273160A CN109441685B CN 109441685 B CN109441685 B CN 109441685B CN 201811273160 A CN201811273160 A CN 201811273160A CN 109441685 B CN109441685 B CN 109441685B
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- China
- Prior art keywords
- fuel
- booster pump
- pressure
- oil
- pipe
- Prior art date
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- 239000000446 fuel Substances 0.000 claims abstract description 105
- 239000003921 oil Substances 0.000 claims abstract description 101
- 239000010687 lubricating oil Substances 0.000 claims abstract description 14
- 238000002347 injection Methods 0.000 claims description 20
- 239000007924 injection Substances 0.000 claims description 20
- 239000000295 fuel oil Substances 0.000 claims description 17
- 230000006837 decompression Effects 0.000 abstract description 7
- 238000002156 mixing Methods 0.000 abstract description 4
- 239000012530 fluid Substances 0.000 abstract 2
- 239000007788 liquid Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 230000009545 invasion Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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
- 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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
- F02M59/46—Valves
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 a high-pressure common rail system of a marine low-speed machine, which comprises a common rail pipe; install in common rail pipe's fuel booster pump, servo oil booster pump and lubricating oil booster pump, fuel booster pump is connected with the sprayer, servo oil booster pump is connected with the discharge valve, lubricating oil booster pump is connected with the oiling rifle, high-pressure fuel pipe has been arranged in the common rail pipe, high-pressure servo oil pipe, low-pressure lubricating oil pipe and fuel return oil pipe, because the pipeline mutual independence between various fluid, can avoid spare part inefficacy and lead to different fluid blending's possibility from the root, thereby the security of system has been improved, because the required low pressure oil supply of discharge valve is obtained through the decompression of high-pressure servo oil, thereby the structure of low-pressure servo oil pump and accessory pipeline has been cancelled in the entire system, system cost has been reduced. Meanwhile, the low-pressure fuel is obtained through the decompression of the high-pressure fuel, so that a low-pressure fuel pump and an accessory pipeline structure are not needed in the whole system, and the system cost is further reduced.
Description
Technical Field
The invention relates to the technical field of marine low-speed machine systems, in particular to a marine low-speed machine high-pressure common rail system.
Background
In the high-pressure common rail system in the existing marine low-speed diesel engine, low-pressure fuel supply is provided by an auxiliary fuel pump, and ultrahigh-pressure fuel injection is obtained by high-pressure servo oil driving. Thus, in the whole machine operation process. Due to other reasons, impurities are mixed into a hydraulic system, the shell of the fuel booster pump is easily scratched, and the sealing ring is damaged, so that the sealing failure is caused. Even in the fuel booster pump, high-pressure fuel and low-pressure fuel leak and isolate with servo oil through the umbrella cap, but can not avoid impurity invasion to destroy the sealing washer and lead to servo oil invasion fuel, lead to the oil mixing of the two and pollute the whole hydraulic system. If the servo oil invades the fuel system, the viscosity of the mixed oil liquid is increased, so that the fuel injection effect and the combustion effect are affected, and abnormal emissions are caused; if the fuel oil enters the servo system, the viscosity of the servo oil is reduced, so that the leakage amount of the system in the exhaust system is increased, the normal opening and closing of the exhaust valve are affected, and the normal operation of the diesel engine is affected.
Disclosure of Invention
In order to solve the technical problems, the technical scheme of the invention provides a high-pressure common rail system of a marine low-speed machine, which comprises the following components:
a common rail pipe;
the fuel booster pump, the servo oil booster pump and the lubricating oil booster pump are respectively arranged on the common rail pipe, the fuel booster pump is connected with the fuel injector, the servo oil booster pump is connected with the exhaust valve, the lubricating oil booster pump is connected with the fuel injection gun,
the high-pressure fuel oil pipe is connected with the fuel booster pump and the oil sprayer, the high-pressure servo oil pipe is connected with the servo oil booster pump and the oil booster pump, the low-pressure servo oil pipe is connected with the servo oil booster pump and the oil booster pump, the fuel oil return pipe is connected with the fuel booster pump and the oil sprayer, and the low-pressure oil pipe is connected with the oil booster pump.
Optionally, the fuel oil pressure reducing device further comprises a fuel oil pressure reducing valve, wherein the fuel oil pressure reducing valve is arranged between the high-pressure fuel oil pipe and the fuel oil booster pump, and a throttle plug is further arranged between the fuel oil pressure reducing valve and the fuel oil booster pump.
Optionally, the fuel pressure reducing valve and the throttle plug reduce the pressure of the high-pressure fuel in the high-pressure fuel pipe and form low-pressure fuel which is delivered to the fuel booster pump.
Optionally, the fuel injection device further comprises a fuel injection valve mounted on the fuel injector, and the fuel injection valve is connected to the high-pressure fuel pipe and the fuel return pipe respectively.
Optionally, the servo oil pressure reducing valve is connected with the high-pressure servo oil pipe and the servo oil booster pump.
Optionally, the servo oil pressure reducing valve reduces pressure of a high-pressure servo oil pipe in the high-pressure servo oil pipes and forms low-pressure servo oil, and the low-pressure servo oil is delivered to the servo oil booster pump.
Optionally, a throttle plug is further installed between the servo oil pressure reducing valve and the high-pressure servo oil pipe.
The technical scheme of the invention has the beneficial effects that:
in the high-pressure common rail system of the marine low-speed machine, the pipelines among various oil liquids are mutually independent, so that the possibility of mixing different oil liquids caused by failure of parts can be radically avoided, and the safety of the system is improved.
In the high-pressure common rail system of the marine low-speed machine, the low-pressure oil supplement required by the exhaust valve is obtained through the decompression of the high-pressure servo oil, so that the structure of a low-pressure servo oil pump and an accessory pipeline is eliminated in the whole system, and the system cost is reduced. Meanwhile, the low-pressure fuel is obtained through the decompression of the high-pressure fuel, so that a low-pressure fuel pump and an accessory pipeline structure are not needed in the whole system, and the system cost is further reduced.
The invention adopts modularized process processing, is convenient for modularized installation, has low manufacturing cost and improves the integration level of the system.
Drawings
Fig. 1 is a schematic structural diagram of a high-pressure common rail system of a marine low-speed machine in an embodiment of the invention.
The specific embodiment is as follows:
the invention is further described below with reference to the drawings and specific examples, which are not intended to be limiting.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the invention will be understood by those skilled in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other by another feature therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is less level than the second feature.
Referring to fig. 1, there is shown an embodiment of a marine low speed machine high pressure common rail system comprising a common rail pipe 11; the fuel booster pump 5, the servo oil booster pump 6 and the lubricating oil booster pump 8 which are respectively arranged on the common rail pipe 11, wherein the fuel booster pump 5 is connected with the fuel injector 1, the servo oil booster pump 6 is connected with the exhaust valve 10, the lubricating oil booster pump 8 is connected with the fuel injection gun 9, the high-pressure fuel pipe 111, the high-pressure servo oil pipe 112, the low-pressure servo oil pipe 113, the low-pressure lubricating oil pipe 115 and the fuel return pipe 114 which are mutually independent are respectively arranged in the common rail pipe 11, the high-pressure fuel pipe 111 is connected with the fuel booster pump 5 and the fuel injector 1, the high-pressure servo oil pipe 112 is connected with the servo oil booster pump 6 and the lubricating oil booster pump 8, the low-pressure servo oil pipe 113 is connected with the servo oil booster pump 6 and the lubricating oil booster pump 8, the fuel return pipe 114 is connected with the fuel booster pump 5 and the fuel injector 1, and the low-pressure lubricating oil pipe 115 is connected with the lubricating oil booster pump 8.
In this embodiment, the fuel pressure reducing valve 3 is further included, the fuel pressure reducing valve 3 is installed between the high-pressure fuel pipe 111 and the fuel booster pump 5, and the throttle plug 4 is also installed between the fuel pressure reducing valve 3 and the fuel booster pump 5.
In the present embodiment, the fuel pressure reducing valve 3 and the throttle plug 4 decompress the high-pressure fuel in the high-pressure fuel pipe 111 and form low-pressure fuel and deliver it to the fuel booster pump 5.
In the present embodiment, the fuel injection valve 2 mounted on the fuel injector 1 is further included, and the fuel injection valve 2 is connected to the high-pressure fuel pipe 111 and the fuel return pipe 114, respectively.
In the embodiment, the device also comprises a servo oil pressure reducing valve 7, and the servo oil pressure reducing valve 7 is connected with a high-pressure servo oil pipe 112 and a servo oil booster pump 6.
In the present embodiment, the servo oil pressure reducing valve 7 reduces the pressure of the high-pressure servo oil pipe 112 and forms low-pressure servo oil, which is supplied to the servo oil booster pump 6.
In this embodiment, a throttle plug 12 is also installed between the servo oil pressure reducing valve 7 and the high-pressure servo oil pipe 112.
The features and functions of the present invention will be further understood from the following description.
Referring to fig. 1, in the present embodiment, the common rail 11 is square in shape, the common rail 11 has 5 oil passages (a high-pressure fuel pipe 111, a high-pressure servo fuel pipe 112, a low-pressure servo fuel pipe 113, a low-pressure lubricant pipe 115 and a fuel return pipe 114), and all the oil passages are completely isolated in the pipe. The fuel injection system, the exhaust system and the injection system are mounted on a high-pressure common rail, and the control of the pressurizing members is performed by respective solenoid valves. The low-pressure fuel supply of the fuel injection system is directly obtained by decompression of the high-pressure fuel in the high-pressure fuel pipe 111, the fuel booster pump 5 is driven by the high-pressure fuel in the common rail pipe 11 to boost the low-pressure fuel to an ultra-high pressure, the control oil of the fuel injection valve 2 is directly derived from the high-pressure fuel in the high-pressure fuel pipe 111 of the common rail pipe 11, and the opening and closing of the fuel injection valve 2 controls the injection quantity of the fuel injector 1. The fuel return amount and the fuel leakage amount from each place in the fuel injection system are collected in the fuel return pipe 114 of the common rail pipe 11. The supercharging drive of the exhaust system is driven by a high-pressure servo oil pipe in a high-pressure servo oil pipe 112 in the common rail pipe 11, low-pressure servo oil is directly obtained by decompression of a servo oil decompression valve 7, and return oil of the servo oil and leakage oil of the servo oil are collected in a servo oil pipe 113 in the common rail pipe 11.
The safety valves of the high-pressure fuel oil and the high-pressure servo oil channels are arranged on the corresponding channels, and as the fuel oil used by the fuel oil injection system is single fuel oil, the oil used by the exhaust system is single servo oil, and all oil passages in the common rail pipe are mutually independent, the possibility of mixing different oil liquids caused by failure of parts is fundamentally avoided, and the safety of the system is improved. In addition, the supply of the low-pressure fuel oil and the replenishment of the low-pressure servo oil are directly obtained through the pressure reducing valve, and a low-pressure fuel pump, a low-pressure servo oil pump and auxiliary pipelines are not needed. Therefore, the whole high-voltage system is simple in layout and low in cost. And the whole subsystem is convenient to process and install in a modularization way, and the integration level and the modularization degree of the system are improved.
The foregoing is merely illustrative of the preferred embodiments of the present invention and is not intended to limit the embodiments and scope of the present invention, and it should be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and illustrations of the present invention, and are intended to be included in the scope of the present invention.
Claims (7)
1. A marine low speed machine high pressure common rail system comprising:
a common rail pipe;
the fuel booster pump, the servo oil booster pump and the lubricating oil booster pump are respectively arranged on the common rail pipe, the fuel booster pump is connected with the fuel injector, the servo oil booster pump is connected with the exhaust valve, the lubricating oil booster pump is connected with the fuel injection gun,
the high-pressure fuel oil pipe is connected with the fuel booster pump and the oil sprayer, the high-pressure servo oil pipe is connected with the servo oil booster pump and the oil booster pump, the low-pressure servo oil pipe is connected with the servo oil booster pump and the oil booster pump, the fuel oil return pipe is connected with the fuel booster pump and the oil sprayer, and the low-pressure oil pipe is connected with the oil booster pump.
2. The marine low speed machine high pressure common rail system of claim 1, further comprising a fuel relief valve mounted between the high pressure fuel line and the fuel booster pump, and a throttle plug mounted between the fuel relief valve and the fuel booster pump.
3. The marine low speed machine high pressure common rail system of claim 2, wherein the fuel pressure relief valve and the throttle plug relieve high pressure fuel in the high pressure fuel line and form low pressure fuel that is delivered to the fuel booster pump.
4. The marine low speed machine high pressure common rail system of claim 2, further comprising an injection valve mounted on the injector, the injection valve being connected to the high pressure fuel line and the fuel return line, respectively.
5. The marine low speed machine high pressure common rail system of claim 1, further comprising a servo oil relief valve connected to the high pressure servo oil line, the servo oil booster pump.
6. The marine low speed machine high pressure common rail system of claim 5, wherein the servo oil pressure reducing valve reduces the high pressure servo oil in the high pressure servo oil line and forms a low pressure servo oil which is delivered to the servo oil booster pump.
7. The marine low speed machine high pressure common rail system of claim 6, wherein a throttle plug is also installed between the servo oil relief valve and the high pressure servo oil line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811273160.8A CN109441685B (en) | 2018-10-29 | 2018-10-29 | High-pressure common rail system of marine low-speed machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811273160.8A CN109441685B (en) | 2018-10-29 | 2018-10-29 | High-pressure common rail system of marine low-speed machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109441685A CN109441685A (en) | 2019-03-08 |
| CN109441685B true CN109441685B (en) | 2023-09-22 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811273160.8A Active CN109441685B (en) | 2018-10-29 | 2018-10-29 | High-pressure common rail system of marine low-speed machine |
Country Status (1)
| Country | Link |
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| CN (1) | CN109441685B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109973272B (en) * | 2019-05-16 | 2024-07-12 | 中船动力研究院有限公司 | Low-speed diesel engine |
| CN110374778A (en) * | 2019-07-29 | 2019-10-25 | 武汉理工大学 | Marine low speed diesel engine common rail fuel injection system solenoid valve reliability test platform |
| CN110529314A (en) * | 2019-10-08 | 2019-12-03 | 中船动力研究院有限公司 | A kind of common-rail system and common rail fuel combustion system |
| CN115560965A (en) * | 2022-09-26 | 2023-01-03 | 中船动力研究院有限公司 | A single-cylinder comprehensive test bench |
| CN118564340B (en) * | 2024-06-03 | 2025-11-25 | 中船动力研究院有限公司 | A modular multi-fuel reserved low-carbon and zero-carbon dual-fuel engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08158971A (en) * | 1994-12-07 | 1996-06-18 | Zexel Corp | Fuel pump for high pressure fuel injection device |
| JP2002115619A (en) * | 2000-10-06 | 2002-04-19 | Hitachi Ltd | Fuel injection device |
| JP2008111404A (en) * | 2006-10-31 | 2008-05-15 | Iseki & Co Ltd | diesel engine |
| WO2010084651A1 (en) * | 2009-01-26 | 2010-07-29 | 三菱重工業株式会社 | Device for controlling variation in pressure upstream of common rail |
| CN202926500U (en) * | 2012-10-22 | 2013-05-08 | 哈尔滨工程大学 | Electronic control common rail fuel injecting system provided with two-stage supercharged piston |
| CN104956066A (en) * | 2013-08-23 | 2015-09-30 | 大陆汽车有限公司 | Pump arrangement and system for a motor vehicle |
| CN105781837A (en) * | 2015-12-28 | 2016-07-20 | 沪东重机有限公司 | High-pressure common rail system for marine diesel engine |
| CN206360827U (en) * | 2016-12-28 | 2017-07-28 | 沪东重机有限公司 | A kind of high pressure co-rail system of new structure arrangement |
| CN107503870A (en) * | 2017-10-10 | 2017-12-22 | 中国第汽车股份有限公司 | Fuel Feeding System for Diesel Engine is united |
| CN209179918U (en) * | 2018-10-29 | 2019-07-30 | 中船动力研究院有限公司 | New Marine low speed machine high pressure co-rail system |
-
2018
- 2018-10-29 CN CN201811273160.8A patent/CN109441685B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08158971A (en) * | 1994-12-07 | 1996-06-18 | Zexel Corp | Fuel pump for high pressure fuel injection device |
| JP2002115619A (en) * | 2000-10-06 | 2002-04-19 | Hitachi Ltd | Fuel injection device |
| JP2008111404A (en) * | 2006-10-31 | 2008-05-15 | Iseki & Co Ltd | diesel engine |
| WO2010084651A1 (en) * | 2009-01-26 | 2010-07-29 | 三菱重工業株式会社 | Device for controlling variation in pressure upstream of common rail |
| CN202926500U (en) * | 2012-10-22 | 2013-05-08 | 哈尔滨工程大学 | Electronic control common rail fuel injecting system provided with two-stage supercharged piston |
| CN104956066A (en) * | 2013-08-23 | 2015-09-30 | 大陆汽车有限公司 | Pump arrangement and system for a motor vehicle |
| CN105781837A (en) * | 2015-12-28 | 2016-07-20 | 沪东重机有限公司 | High-pressure common rail system for marine diesel engine |
| CN206360827U (en) * | 2016-12-28 | 2017-07-28 | 沪东重机有限公司 | A kind of high pressure co-rail system of new structure arrangement |
| CN107503870A (en) * | 2017-10-10 | 2017-12-22 | 中国第汽车股份有限公司 | Fuel Feeding System for Diesel Engine is united |
| CN209179918U (en) * | 2018-10-29 | 2019-07-30 | 中船动力研究院有限公司 | New Marine low speed machine high pressure co-rail system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109441685A (en) | 2019-03-08 |
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