CN104533665A - Fuel gas inlet branch pipe sealing structure for double-fuel engine - Google Patents
Fuel gas inlet branch pipe sealing structure for double-fuel engine Download PDFInfo
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- CN104533665A CN104533665A CN201410797014.0A CN201410797014A CN104533665A CN 104533665 A CN104533665 A CN 104533665A CN 201410797014 A CN201410797014 A CN 201410797014A CN 104533665 A CN104533665 A CN 104533665A
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- face
- fuel gas
- injection valve
- gas injection
- ring seals
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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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Abstract
The invention discloses a fuel gas inlet branch pipe sealing structure for a double-fuel engine. The fuel gas inlet branch pipe sealing structure for the double-fuel engine comprises a fuel gas inlet branch pipe and a fuel gas injection valve connected with one end of the fuel gas inlet branch pipe. The fuel gas inlet branch pipe is of a double-layer structure and comprises an inner pipe body and an outer pipe body, the end, connected with the fuel gas injection valve, of the inner pipe body extends out of the end face of the outer pipe body, and the extension end of the inner pipe body is provided with a protruding portion and an extending portion, wherein the protruding portion extends outwards in the radial direction, and the extending portion extends into the fuel gas injection valve in the length direction. A first end face O-shaped seal ring is arranged between the end face of the protruding portion and the end face of the fuel gas injection valve. The outer wall of the protruding portion is in abutting joint with the inner wall of the fuel gas injection valve, and a radial O-shaped seal ring is arranged between the outer wall of the protruding portion and the inner wall of the fuel gas injection valve. The fuel gas inlet branch pipe sealing structure for the double-fuel engine is simple and novel in structure and capable of guaranteeing reliable sealing of the connection portion between the fuel gas inlet branch pipe and the fuel gas injection valve and preventing fuel gas leakage, and improves the safety of the double-fuel engine.
Description
Technical field
The invention belongs to technical field of engines, relate to a kind of duel fuel engine gas inlet and prop up tube seal structure.
Background technique
The requirement of International Maritime Organization (IMO) to discharge is increasingly strict, some areas have explicitly called for the discharge in 2016 to reach Tier III, to fulfill this requirement, not only to design will be optimized to engine structure, the fresh fuel of clean environment firendly more must also be used.Rock gas is as clean energy resource, and automotive field is at home and abroad widely applied, has queued great role to falling of motor.In high power engine, employing LNG Liquefied natural gas (LNG)+diesel oil (MDO) or the duel fuel engine that compressed natural gas (CNG)+diesel oil (MDO) is main fuel are also developed.
High-power duel fuel engine generally adopts multi-point injection intake method, ensure that rock gas and diesel oil large optimum mixture ratio under different operating mode, substantially increase the Economy of motor, but combustion gas is in motor in course of conveying, easily to leak, and then generation potential safety hazard, especially at gas inlet arm and fuel gas injection valve connection part, due to comparatively near engine chamber, once leak, as easy as rolling off a log initiation security incident, therefore, seems particularly important to the reliable sealing of this connection part.
Summary of the invention
For solving above technical problem, the invention provides a kind of duel fuel engine gas inlet and propping up tube seal structure, reliable sealing can be formed to gas inlet arm and fuel gas injection valve connection part, prevent gas leakage, improve engine health.
Its technological scheme is as follows:
A kind of duel fuel engine gas inlet props up tube seal structure, the fuel gas injection valve comprising gas inlet arm and be connected with this fuel gas injection valve one end, described gas inlet arm is double layer construction, comprise inner and outer tubes, in the one end be connected with fuel gas injection valve, described interior pipe stretches out outer tube end face, the extension its external part being provided with the lug boss extended radially outward and stretching into along its length in fuel gas injection valve;
Described lug boss end face abuts with fuel gas injection valve end face, is provided with the first end face O-ring seals between lug boss end face and fuel gas injection valve end face;
Described extension outer wall abuts with fuel gas injection valve inwall, between this extension outer wall and fuel gas injection valve inwall, be provided with radial O-ring seals;
Be arranged with the first flange plate outside described lug boss, outer tube end has been wholely set the second flange plate, and described first flange plate is clamped between fuel gas injection valve end face and the second flange plate.
Adopt above structure, double-deck gas inlet arm has better sealability, gas inlet arm and fuel gas injection valve adopt Flange joint, and establish radial O-ring seals and end face O-ring seals, ensure that the reliable sealing of gas inlet arm and fuel gas injection valve connection part, prevent gas leakage, substantially increase engine health.
Preferably, the end face that described fuel gas injection valve is relative with lug boss is provided with first end face pockets, described first end face O-ring seals falls into this first end face pockets, and this first end face O-ring seals diameter of section is greater than the degree of depth of first end face pockets.Adopt above structure, first end face O RunddichtringO can remain in the pockets of first end face, be unlikely to skid off, simultaneously, first end face is received depth of groove and is less than the diameter of the first end face O RunddichtringO, after mounting, fuel gas injection valve and lug boss fully can extrude the first end face O RunddichtringO, improve its sealability further.
Preferably, described extension outer wall is provided with radial pockets, described radial O-ring seals falls into this radial pockets, and this radial O-ring seals diameter of section is greater than the degree of depth of radial pockets, after this structure ensure that radial O-ring seals is installed, there is certain pretightening force, strengthen the sealing between interior pipe and fuel gas injection valve.
Preferably, the second end face O-ring seals is provided with between described first flange plate and fuel gas injection valve end face, the first flange plate end face relative with this second end face O-ring seals is provided with the second end face pockets, described second end face O-ring seals falls into this second end face pockets, and this second end face O-ring seals diameter of section is greater than the degree of depth of the second end face pockets, to guarantee the reliable sealing between fuel gas injection valve end face and the first flange plate, and form the second end face seal between gas inlet arm and fuel gas injection valve.
Preferably, the 3rd end face O-ring seals is provided with between described first flange plate and the second flange plate, the second flange plate end face relative with the 3rd end face O-ring seals is provided with the 3rd end face pockets, described 3rd end face O-ring seals falls into the 3rd end face pockets, and the 3rd end face O-ring seals diameter of section is greater than the three end face pockets degree of depth.Adopt above structure, the reliable sealing between interior pipe and outer tube can be ensured, prevent combustion gas from leaking between inner and outer pipe.
Beneficial effect: structure of the present invention is simply novel, can guarantee the reliable sealing of gas inlet arm and fuel gas injection valve connection part, prevent gas leakage, improves the Security of duel fuel engine.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the close-up schematic view at A place in Fig. 1;
Fig. 3 is the structural representation of interior pipe near fuel gas injection valve one end in the present invention.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the invention will be further described.
A kind of duel fuel engine gas inlet as shown in Figure 1 props up tube seal structure, comprise gas inlet arm 1 and fuel gas injection valve 2, Flange joint is adopted between gas inlet arm 1 and fuel gas injection valve 2, described gas inlet arm 1 is double layer construction, comprise interior pipe 11 and outer tube 12, interior pipe 11 is located in outer tube 12, this interior pipe 11 length is greater than outer tube 12, outer tube 12 end face is stretched out at its two ends respectively, in the one end away from fuel gas injection valve 2, the end of described interior pipe 11 and outer tube 12 is installed with end flanges dish 9 respectively, gas inlet house steward (place not shown in the figures) is connected to facilitate.
Refer to Fig. 3, in the one end be connected with fuel gas injection valve 2, described interior pipe 11 stretches out outer tube 12 end face, and its external part is provided with the lug boss 11a extended radially outward and the extension 11b extended left along its length.
Composition graphs 2 can be found out, described lug boss 11a left end face abuts with fuel gas injection valve 2 its right end face, described extension 11b stretches in fuel gas injection valve 2, the internal diameter of this extension 11b is less than the internal diameter of interior pipe 11 main body, extension 11b outer wall abuts with fuel gas injection valve 2 inwall, and described extension 11b outer wall is provided with radial pockets 11c.
As can be seen from Fig. 2 composition graphs 3, radial O-ring seals 4 is provided with between described extension 11b outer wall and fuel gas injection valve 2 inwall, described radial O-ring seals 4 falls into radial pockets 11c, and radial O-ring seals 4 diameter of section is greater than the degree of depth of radial pockets 11c.
The first end face O-ring seals 3 is provided with between lug boss 11a left end face and fuel gas injection valve 2 its right end face, the end face that described fuel gas injection valve 2 is relative with lug boss 11a is provided with first end face pockets 2a, first end face O-ring seals 3 falls into this first end face pockets 2a, and this first end face O-ring seals 3 diameter of section is greater than the degree of depth of first end face pockets 2a.
Described lug boss 11a radial outside is arranged with the first flange plate 5, outer tube 12 end of homonymy has been wholely set the second flange plate 6, described first flange plate 5 is clamped between fuel gas injection valve 2 end face and the second flange plate 6, to realize the Flange joint between gas inlet arm 1 and fuel gas injection valve 2.
The second end face O-ring seals 7 is provided with between described first flange plate 5 and fuel gas injection valve 2 end face, first flange plate 5 end face relative with this second end face O-ring seals 7 is provided with the second end face pockets 5a, described second end face O-ring seals 7 falls into this second end face pockets 5a, and this second end face O-ring seals 7 diameter of section is greater than the degree of depth of the second end face pockets 5a.
The 3rd end face O-ring seals 8 is provided with between first flange plate 5 and the second flange plate 6, second flange plate 6 end face relative with the 3rd end face O-ring seals 8 is provided with the 3rd end face pockets 6a, described 3rd end face O-ring seals 8 falls into the 3rd end face pockets 6a, and the 3rd end face O-ring seals 8 diameter of section is greater than the three end face pockets 6a degree of depth.
It should be noted that, above embodiment is only in order to illustrate technical solution of the present invention but not restriction technologies scheme, although claimant is explained in detail the present invention with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, those amendments that technical solution of the present invention is carried out or equivalently to replace, aim and the scope of the technical program can not be departed from, all should be encompassed in the middle of the claims in the present invention scope.
Claims (5)
1. a duel fuel engine gas inlet props up tube seal structure, the fuel gas injection valve (2) comprising gas inlet arm (1) and be connected with this fuel gas injection valve (2) one end, it is characterized in that: described gas inlet arm (1) is double layer construction, comprise interior pipe (11) and outer tube (12), in the one end be connected with fuel gas injection valve (2), described interior pipe (11) stretches out outer tube (12) end face, its external part is provided with the lug boss (11a) extended radially outward and the extension (11b) stretched into along its length in fuel gas injection valve (2),
Described lug boss (11a) end face abuts with fuel gas injection valve (2) end face, is provided with the first end face O-ring seals (3) between lug boss (11a) end face and fuel gas injection valve (2) end face;
Described extension (11b) outer wall abuts with fuel gas injection valve (2) inwall, is provided with radial O-ring seals (4) between this extension (11b) outer wall and fuel gas injection valve (2) inwall;
Described lug boss (11a) outside is arranged with the first flange plate (5), outer tube (12) end has been wholely set the second flange plate (6), and described first flange plate (5) is clamped between fuel gas injection valve (2) end face and the second flange plate (6).
2. duel fuel engine gas inlet according to claim 1 props up tube seal structure, it is characterized in that: the end face that described fuel gas injection valve (2) is relative with lug boss (11a) is provided with first end face pockets (2a), described first end face O-ring seals (3) falls into this first end face pockets (2a), and this first end face O-ring seals (3) diameter of section is greater than the degree of depth in first end face pockets (2a).
3. duel fuel engine gas inlet according to claim 2 props up tube seal structure, it is characterized in that: described extension (11b) outer wall is provided with radial pockets (11c), described radial O-ring seals (4) falls into this radial pockets (11c), and this radial O-ring seals (4) diameter of section is greater than the degree of depth of radial pockets (11c).
4. the duel fuel engine gas inlet according to claim 1 or 2 or 3 props up tube seal structure, it is characterized in that: between described first flange plate (5) and fuel gas injection valve (2) end face, be provided with the second end face O-ring seals (7), first flange plate (5) end face relative with this second end face O-ring seals (7) is provided with the second end face pockets (5a), described second end face O-ring seals (7) falls into this second end face pockets (5a), and this second end face O-ring seals (7) diameter of section is greater than the degree of depth of the second end face pockets (5a).
5. duel fuel engine gas inlet according to claim 4 props up tube seal structure, it is characterized in that: between described first flange plate (5) and the second flange plate (6), be provided with the 3rd end face O-ring seals (8), second flange plate (6) end face relative with the 3rd end face O-ring seals (8) is provided with the 3rd end face pockets (6a), described 3rd end face O-ring seals (8) falls into the 3rd end face pockets (6a), and the 3rd end face O-ring seals (8) diameter of section is greater than three end face pockets (6a) degree of depth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410797014.0A CN104533665A (en) | 2014-12-19 | 2014-12-19 | Fuel gas inlet branch pipe sealing structure for double-fuel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410797014.0A CN104533665A (en) | 2014-12-19 | 2014-12-19 | Fuel gas inlet branch pipe sealing structure for double-fuel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104533665A true CN104533665A (en) | 2015-04-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410797014.0A Pending CN104533665A (en) | 2014-12-19 | 2014-12-19 | Fuel gas inlet branch pipe sealing structure for double-fuel engine |
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| Country | Link |
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| CN (1) | CN104533665A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104989558A (en) * | 2015-07-10 | 2015-10-21 | 广西玉柴机器股份有限公司 | Double-layer pipe joint for engine gas supply system |
| CN109404167A (en) * | 2018-12-29 | 2019-03-01 | 重庆红江机械有限责任公司 | Fuel gas injection valve and the gas or dual fuel engine for using it |
| CN110595253A (en) * | 2019-10-12 | 2019-12-20 | 中船动力研究院有限公司 | Diesel engine air cooler seal structure and diesel engine |
| CN112879120A (en) * | 2021-01-26 | 2021-06-01 | 东风汽车集团股份有限公司 | Oil pan sealing structure and method, engine and automobile |
-
2014
- 2014-12-19 CN CN201410797014.0A patent/CN104533665A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104989558A (en) * | 2015-07-10 | 2015-10-21 | 广西玉柴机器股份有限公司 | Double-layer pipe joint for engine gas supply system |
| CN104989558B (en) * | 2015-07-10 | 2019-03-15 | 广西玉柴机器股份有限公司 | The Double-layer frame joint of engine gas feed system |
| CN109404167A (en) * | 2018-12-29 | 2019-03-01 | 重庆红江机械有限责任公司 | Fuel gas injection valve and the gas or dual fuel engine for using it |
| CN109404167B (en) * | 2018-12-29 | 2020-11-24 | 重庆红江机械有限责任公司 | Gas injection valve and gas or dual-fuel engine adopting same |
| CN110595253A (en) * | 2019-10-12 | 2019-12-20 | 中船动力研究院有限公司 | Diesel engine air cooler seal structure and diesel engine |
| CN112879120A (en) * | 2021-01-26 | 2021-06-01 | 东风汽车集团股份有限公司 | Oil pan sealing structure and method, engine and automobile |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150422 |
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| WD01 | Invention patent application deemed withdrawn after publication |