CN205422982U - Can avoid natural gas take a breath loss marine dual -fuel engine fuel supply system - Google Patents
Can avoid natural gas take a breath loss marine dual -fuel engine fuel supply system Download PDFInfo
- Publication number
- CN205422982U CN205422982U CN201521048197.2U CN201521048197U CN205422982U CN 205422982 U CN205422982 U CN 205422982U CN 201521048197 U CN201521048197 U CN 201521048197U CN 205422982 U CN205422982 U CN 205422982U
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- China
- Prior art keywords
- natural gas
- air
- arm
- blender
- valve
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- 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.)
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- 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
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- Feeding And Controlling Fuel (AREA)
Abstract
An object of the utility model is to provide a can avoid natural gas take a breath loss marine dual -fuel engine fuel supply system, including natural gas tanks, blender, combustion chamber, blast main pipe, the (air) intake valve department of combustion chamber sets up the inlet manifold, and the exhaust valve department of combustion chamber sets up the exhaust passage, and combustion chamber top installation firewood oil spraying mouth, natural gas tanks feed through the import of natural gas passageway, and the export of natural gas passageway feeds through the blender, and the blender passes through gas mixture intake duct intercommunication inlet manifold, and blast main pipe's tail end divides into first branch pipe and second branch pipe, and at first branch pipe intercommunication blender, the second branch pipe feeds through the inlet manifold. The utility model discloses avoid in scavenging period the gas mixture in by direct scan -in air, avoided the waste of fuel and the destruction of environment.
Description
Technical field
The utility model relates to a kind of dual fuel engine, Premix CNG/Diesel Dual Fuel Engine the most peculiar to vessel.
Background technology
Along with Abgasgesetz is gradually strict and oil supplies the most prominent of contradiction, conventional diesel engine application in Shipping industry faces increasing challenge.Many countries begin one's study and are applied to the substitute fuel of conventional engines.Wherein, natural gas, because is that the features such as caloric value is high, discharge cleaning, reserves are big receive significant attention.
The normal pressure ignition temperature of natural gas about 600-650 DEG C, far above diesel oil (about 280 DEG C), it is difficult to directly by compression ignition mode ignition, simultaneously, the cylinder diameter of natural gas engine peculiar to vessel is big etc., and feature makes sparking mode be difficult to, it is accomplished by trace diesel oil to provide ignition energy, i.e. dual fuel engine.A large amount of fire core can be formed in combustor at the compression travel diesel oil that high pressure sprays into latter stage, light combustion mixture around equably, and spread rapidly.Excess air coefficient in cylinder is few simultaneously so that the discharge of the harmful gass such as NOx is significantly lower than the diesel engine of Same Efficieney.
The dual fuel engine peculiar to vessel that natural gas is mixed with free-air diffuser, owing to gaseous mixture air intake duct is longer, natural gas and air enter combustor after mixing in air intake duct, after IC Intake Valve Closes, can be by the mixing QI GUAN of portion of natural gas and air in air intake duct, burning terminates, this part gaseous mixture is directly swept air in aeration phase, natural gas has bigger destruction to ozone layer, the most not only causes the waste of fuel, and brings the destruction of environment.In the air intake duct pre-mixed technology that there is now, drawbacks described above is inevitable.
Summary of the invention
The purpose of this utility model is to provide and can solve the problem that the dual fuel engine fuel feed system peculiar to vessel that the gaseous mixture remained in air intake duct directly sweeps in scavenging period the caused environmental disruption of air, problem of resource waste.
The purpose of this utility model is achieved in that
nullA kind of dual fuel engine fuel feed system peculiar to vessel that can avoid natural gas gas exchange loss of this utility model，It is characterized in that: include natural gas tank、Blender、Combustor、Air header，At the inlet valve of combustor, inlet manifold is set，At the exhaust valve of combustor, exhaust duct is set，Top of combustion chamber installs diesel fuel nozzle，The import of natural gas tank connection natural gas passage，The outlet blender of natural gas passage，Relief valve is installed at natural gas channel entrance，Natural gas channel exit installs natural gas intake control valve，Blender connects inlet manifold by gaseous mixture air intake duct，Gaseous mixture air intake duct arranges check valve with the junction of inlet manifold，The tail end of air header is divided into the first arm and the second arm，At air header、The junction of the first arm and the second arm arranges and controls air header and the first arm or air header and the choke valve of the second arm connection，First arm connection blender，Second arm connection inlet manifold.
This utility model can also include:
1, entering process at fuel, air header and the first arm are connected by choke valve, and simultaneously switch off air header and the second arm, and the natural gas from natural gas tank and the air from air header form gaseous mixture in blender and enter combustor；In aeration phase, air header and the second arm are connected, and simultaneously switch off air header and the first arm by choke valve, and the air from air header enters combustor through the second arm.
Advantage of the present utility model is:
1, by traditional single air intake duct is divided into gaseous mixture air intake duct and free-air diffuser, it is to avoid in scavenging period, gaseous mixture is directly swept in air, it is to avoid the waste of fuel and the destruction of environment.
2, according to engine operating condition, control choke valve, natural gas intake control valve by ECU, it is achieved air, the intake of natural gas, and then realize natural gas more fully, burn economically.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
Illustrate below in conjunction with the accompanying drawings and this utility model be described in more detail:
In conjunction with Fig. 1, natural gas tank 1 connects natural gas passage 3, and natural gas passage 3 connects natural gas and air mixer 5；Installing relief valve 2 in natural gas passage 3 import department, natural gas intake control valve 4 is installed in exit；Air header 11 is divided into upper and lower two arms by choke valve 12, and one is referred to as free-air diffuser 13, leads to inlet valve 15 top, and on inlet valve 15 top, about 8cm converges with gaseous mixture air intake duct 6；Another connects up blender 5；Mixed gas outlet connects gaseous mixture air intake duct 6, and gaseous mixture air intake duct 6 pools house steward at inlet valve 15 top about 8cm with free-air diffuser 13 and is connected inlet valve 15, leads to combustor 16；Check valve 14 is installed in gaseous mixture air intake duct 6 exit；In combustor 16 top cylinder head central authorities, diesel fuel nozzle 7 is installed；Check valve 14, choke valve 12, natural gas intake control valve 4 all access ECU control chamber 10, and ECU control chamber 10 is installed on body.
As it is shown in figure 1, enter process at fuel, choke valve 12 is controlled to start downwards by ECU, forms gaseous mixture with natural gas in blender 5, and blended gas air intake duct 6 enters combustor 16；Inlet valve 15 is closed, and piston 17 moves upward, and close near top dead center, ECU control chamber controls diesel fuel nozzle 7 and sprays into diesel pilot, completes combustion process.Aeration phase, choke valve 12 is opened fully up by ECU, air enters combustor through free-air diffuser 12, open and close along with exhaust valve, complete scavenging period, this process directly will not sweep residuing in blender 5 in air with the natural gas in gaseous mixture air intake duct 6, is conducive to saving the energy, reduces the pollution that air is caused by natural gas.
The choke valve that in intake process, ECU controls is opened downwards, air flow blender, and natural gas enters blender through gas discharge control valve and mixes with air, and the gaseous mixture of formation enters combustor through check valve, inlet valve；After IC Intake Valve Closes, time near piston approaches top dead center, ECU controls diesel fuel nozzle and sprays into appropriate fuel oil entrance combustor, lights the gaseous mixture of combustor.
During engine breathing, the choke valve that ECU controls upwardly opens, and natural gas flow control valve is closed, closed check valve.Air directly enters combustor through free-air diffuser, inlet valve, completes scavenging period.
Diesel pilot nozzle is arranged on the centre position of described Combustor lid.
A kind of dual fuel engine fuel feed system peculiar to vessel that can avoid natural gas gas exchange loss of this utility model, the choke valve 12 mainly include natural gas tank 1, being controlled by ECU, the ECU diesel fuel nozzle 7 controlled, gaseous mixture air intake duct 6, free-air diffuser 13, ECU control chamber 10, natural gas and air mixer 5, check valve 14, relief valve 2, air header 11, natural gas flow control valve 4, natural gas passage 3.
Gaseous mixture air intake duct 6 is separated with free-air diffuser 13, comprises two inlet channels；When fuel enters, ECU controls choke valve 12 and opens downwards, is disconnected by free-air diffuser 13, and air enters combustor through gaseous mixture air intake duct 6 after mixing in blender 5 with natural gas；In scavenging period, ECU controls choke valve 12 and upwardly opens, and air enters combustor through free-air diffuser 13.
Choke valve 12, natural gas intake control valve 4, check valve 12, diesel fuel nozzle 7 control by ECU control chamber 10 according to engine behavior control.
14, the check valve that ECU control chamber 10 controls allows gaseous mixture to pass through, and does not allow the gas in combustor 16 to flow up.
The natural gas flow control valve 4 that ECU control chamber 10 controls can control, according to the practical situation of electromotor work, the amount of natural gas being passed through.
The choke valve 12 that ECU control chamber 10 controls can adjust upper and lower aperture according to the amount of natural gas being passed through, in order to meet the needs of natural gas mixed combustion.
The diesel fuel nozzle 7 that ECU control chamber 10 controls can determine, according to the amount of natural gas entered, the Pilot diesel quantity sprayed into.
Claims (2)
- null1. the dual fuel engine fuel feed system peculiar to vessel that can avoid natural gas gas exchange loss，It is characterized in that: include natural gas tank、Blender、Combustor、Air header，At the inlet valve of combustor, inlet manifold is set，At the exhaust valve of combustor, exhaust duct is set，Top of combustion chamber installs diesel fuel nozzle，The import of natural gas tank connection natural gas passage，The outlet blender of natural gas passage，Relief valve is installed at natural gas channel entrance，Natural gas channel exit installs natural gas intake control valve，Blender connects inlet manifold by gaseous mixture air intake duct，Gaseous mixture air intake duct arranges check valve with the junction of inlet manifold，The tail end of air header is divided into the first arm and the second arm，At air header、The junction of the first arm and the second arm arranges and controls air header and the first arm or air header and the choke valve of the second arm connection，First arm connection blender，Second arm connection inlet manifold.
- A kind of dual fuel engine fuel feed system peculiar to vessel that can avoid natural gas gas exchange loss the most according to claim 1, it is characterized in that: enter process at fuel, air header and the first arm are connected by choke valve, and simultaneously switching off air header and the second arm, the natural gas from natural gas tank and the air from air header form gaseous mixture in blender and enter combustor；In aeration phase, air header and the second arm are connected, and simultaneously switch off air header and the first arm by choke valve, and the air from air header enters combustor through the second arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521048197.2U CN205422982U (en) | 2015-12-11 | 2015-12-11 | Can avoid natural gas take a breath loss marine dual -fuel engine fuel supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521048197.2U CN205422982U (en) | 2015-12-11 | 2015-12-11 | Can avoid natural gas take a breath loss marine dual -fuel engine fuel supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205422982U true CN205422982U (en) | 2016-08-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521048197.2U Withdrawn - After Issue CN205422982U (en) | 2015-12-11 | 2015-12-11 | Can avoid natural gas take a breath loss marine dual -fuel engine fuel supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205422982U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422319A (en) * | 2015-12-11 | 2016-03-23 | 哈尔滨工程大学 | Ship dual-fuel engine fuel supply system capable of preventing natural gas change loss |
-
2015
- 2015-12-11 CN CN201521048197.2U patent/CN205422982U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422319A (en) * | 2015-12-11 | 2016-03-23 | 哈尔滨工程大学 | Ship dual-fuel engine fuel supply system capable of preventing natural gas change loss |
| CN105422319B (en) * | 2015-12-11 | 2017-12-01 | 哈尔滨工程大学 | A kind of dual fuel engine fuel feed system peculiar to vessel that can avoid natural gas gas exchange loss |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160803 Effective date of abandoning: 20171201 |