CN203925792U - A kind of Multi-point jetting type gas/duel fuel engine combustion gas and air premixing appts - Google Patents
A kind of Multi-point jetting type gas/duel fuel engine combustion gas and air premixing appts Download PDFInfo
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- CN203925792U CN203925792U CN201420323088.6U CN201420323088U CN203925792U CN 203925792 U CN203925792 U CN 203925792U CN 201420323088 U CN201420323088 U CN 201420323088U CN 203925792 U CN203925792 U CN 203925792U
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- jet pipe
- intake duct
- straight tube
- small end
- support board
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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 purpose of this utility model is to provide a kind of Multi-point jetting type gas/duel fuel engine combustion gas and air premixing appts, comprise intake duct, external support board, center brace panel, blade, jet pipe, honeycomb duct, the middle part of external support board arranges hole, external support board is arranged on intake duct, the hole of external support board is positioned in intake duct, center brace panel is positioned in hole, the two ends of blade are arranged on respectively in external support board and center brace panel, jet pipe is Rafael nozzle, Rafael nozzle comprises convergent jet pipe and divergent nozzle, divergent nozzle is arranged on by its internal thread outside the outside thread of convergent jet pipe small end, the small end of convergent jet pipe and the small end of divergent nozzle are arranged in the circular hole at center brace panel middle part, the upper end portion of honeycomb duct is arranged on intake duct, the lower end part of honeycomb duct is in intake duct.The utility model can effectively improve the burning quality of manifold Multi-point jetting type gas/duel fuel engine, improves motor fuel Economy, reduces engine exhaust emission.
Description
Technical field
The utility model relates to a kind of gas/duel fuel engine, specifically the air inlet system of gas/duel fuel engine.
Background technique
Rock gas is the green energy resource of a kind of aboundresources, low-carbon environment-friendly, is the important technique measure that can simultaneously alleviate current energy shortage and environmental pollution problem using rock gas as motor fuel.Natural gas engine is divided according to fuel usage mode, mainly contains two kinds: pure gas engine fuel and duel fuel engine.Can be divided into according to natural gas supply mode: the outer air feed of cylinder, in-cylinder fuel supply and composite air supply mode.The outer plenum system of cylinder due to air supply system require lowly, therefore application is the most general, it comprises again single-point plenum system and multi-point injection mode.For single-point plenum system, conventionally Venturi tube or proportion expression mechanical mixer are arranged on intake manifold, control air and combustion gas according to fixing ratio supply and mixing, although it is long that single-point plenum system has mixed gas formation time, combustion gas mixes comparatively even with air, simple and the low cost and other advantages of system architecture, but single-point discharge mode cannot realize the accurate control of air fuel ratio, each cylinder fuel distributes conformity poor, working conditions change reaction to motor is slower, there is scavenging loss, motor pollutant emission and heat load are all higher, and easily cause the problems such as suction tude detonation.And manifold multi-point gas spray regime can effectively be alleviated the problems referred to above, therefore will substitute gradually single-point mode.But experimental study shows, compared with intake manifold's single-point air feed, the spray regime combustion gas of manifold multi-point gas and air incorporation time are short, mix inhomogeneous, along with the increase of engine load increase or fuel gas injection amount, motor HC discharge and delivery temperature increase are comparatively obvious, if the mixed problem that does not solve fuel and air will be unfavorable for that motor realizes the raising of energy-saving and emission-reduction and reliability.And Venturi tube and mechanical mixer be due to the restriction of its physical dimension and motor installing space, it is very inconvenient in intake manifold, to install.
Summary of the invention
The purpose of this utility model is to provide gaseous fuel and air before entering cylinder, realizes well-mixed a kind of Multi-point jetting type gas/duel fuel engine combustion gas and air premixing appts in intake duct.
The purpose of this utility model is achieved in that
A kind of Multi-point jetting type gas/duel fuel engine combustion gas of the utility model and air premixing appts, it is characterized in that: comprise intake duct, external support board, center brace panel, blade, jet pipe, honeycomb duct, the middle part of external support board arranges hole, external support board is arranged on intake duct, the hole of external support board is positioned in intake duct, the shape in hole is identical with intake duct sectional shape, center brace panel is positioned in hole, the two ends of blade are arranged on respectively in external support board and center brace panel, jet pipe is Rafael nozzle, Rafael nozzle comprises convergent jet pipe and divergent nozzle, the small end of convergent jet pipe arranges outside thread, the small end of divergent nozzle arranges internal thread, divergent nozzle is arranged on by its internal thread outside the outside thread of convergent jet pipe small end, the small end of convergent jet pipe and the small end of divergent nozzle are arranged in the circular hole at center brace panel middle part, the upper end portion of honeycomb duct is arranged on intake duct, the lower end part of honeycomb duct is in intake duct.
The utility model can also comprise:
1, blade integral is mentioned ridge-shaped structure, become fan-shaped from center brace panel to external support board direction, the crestal line both sides of blade are processed with the aperture of falling fish scale-shaped, form triangle reducing passage between adjacent blades, and the crestal line of blade and external support board and inner support plate are in same plane.
2, the diameter of the large end of convergent jet pipe and the large end of divergent nozzle is not more than center brace panel outside diameter.
3, the small end of convergent jet pipe and the small end of divergent nozzle all arrange waist hole, and when the small end of convergent jet pipe is positioned in the small end of divergent nozzle, two waist holes overlap.
4, the underpart of honeycomb duct is straight tube, and the center line of straight tube overlaps with the center line of intake duct, and the endcapped of straight tube is provided with fumarole on the tube wall of straight tube, and it is perpendicular that the jet a fluid stream direction that fumarole produces and the air of intake duct carry out flow path direction.
Advantage of the present utility model is: the utility model can effectively improve the burning quality of manifold Multi-point jetting type gas/duel fuel engine, improves motor fuel Economy, reduces engine exhaust emission.
Brief description of the drawings
Fig. 1 is the axonometric drawings such as part of the present utility model;
Fig. 2 is part front view of the present utility model;
Fig. 3 is part side view of the present utility model;
Fig. 4 a is the structural drawing a of the utility model jet pipe, and Fig. 4 b is the structural drawing b of the utility model jet pipe;
Fig. 5 is integral installation figure of the present utility model;
Fig. 6 is the axonometric drawings such as the utility model part of being applied to circular intake duct.
Embodiment
For example the utility model is described in more detail below in conjunction with accompanying drawing:
In conjunction with Fig. 1～6, the technical solution of the utility model is achieved in that the manifold combustion gas of a kind of Multi-point jetting type gas/duel fuel engine and air mixing device are made up of external support board 1, center brace panel 2, blade 3 and jet pipe 4.It is characterized in that: external support board 1 is that thickness is the sheet metal of 1.5-2 millimeter, on external support board 1, be processed with the hole identical with inlet mouth shape and size with intake manifold inner chamber, this spline structure can ensure that mixing arrangement valid circulation area meets the air inflow requirement of motor, this hole is connected with the end of blade 3 in circumferential direction, blade 3 is played to fixation, between blade 3 and external support board 1, adopt the mode of welding to be connected, the outward edge of external support board is processed with bolt hole 6, the metal sheet structure of external support board 1 can guarantee that mixing arrangement is arranged between intake manifold and cylinder cap easily, can not take too much motor installing space.
Center brace panel 2 is circular, thickness is the steel plate of 1.5-2mm, in center brace panel 2, be processed with circular hole, circular hole is used for installing Rafael nozzle 4, Rafael nozzle 4 is made up of one section of convergent jet pipe 7 and one section of gradually expanding shape jet pipe 10, two sections of jet pipes are arranged on respectively the both sides of center brace panel 2, convergent jet pipe 7 and divergent nozzle 10 are respectively with straight-run of pipe 8 and 11, the straight length 8 of tapered jet pipe 7 is processed with outside thread, and gradually expanding shape jet pipe 10 straight lengths 11 are processed with internal thread, the mode that is threaded connection by convergent jet pipe 7 and divergent nozzle 10 clampings in center brace panel 2, realize and connect and fix, cause coming off of two sections of jet pipes in order to prevent that motor from vibrating in the course of the work, on convergent jet pipe 7 and divergent nozzle 10, be also processed with respectively two sections of waist holes 9 and 12, utilize the mode of riveted joint that two sections of jet pipes are fixed together.
At circumferentially uniform multiple blades 3 of the outer of center brace panel 2, blade 3 is connected with center brace panel 2 by welding manner, blade 3 ends are connected with the inward flange in hole on external support board 1, the crestal line of blade 3 and external support board 1 and inner support plate 2 are in same plane, described blade 3 becomes fan-shaped from center brace panel 2 to external support board 1 direction, blade 3 entirety are mentioned ridge-shaped structure, and crestal line both sides are processed with multiple apertures of falling fish scale-shaped 5, form a triangle reducing passage between every two blades 3.
Tapered jet pipe 7 inlet diameters of Rafael nozzle 4 and gradually expanding shape jet pipe 10 outlet diameters are all not more than the outside diameter of center brace panel, can increase the valid circulation area of device.
When combustion gas and air mixing device are arranged between intake manifold and engine cylinder cover, the crestal line of mentioned ridge-shaped blade 3 is in the face of the flow path direction that comes of air inlet, be that combustion gas and an air Mixture part are carried out Mass and mixing by the hole 5 of the structure of falling fish scale, another part flows striking after blade 3 walls along blade surface, occur to clash into and blending with air-flow and jet pipe 4 exit flows of the air-flow of opposite side wall, the triangle reducing passage of flowing through, realize multiple dimensioned shock and the mixing of large velocity gradient.
Gas nozzle 14 is with honeycomb duct 15, honeycomb duct 15 center lines of the preceding paragraph straight tube and the center line of intake manifold are approximate to be overlapped, with the approximate one section of water conservancy diversion endcapped overlapping of suction tude center line, on tube wall, be processed with multiple fumaroles 16, and this section of pipeline is as far as possible away from mixing arrangement, and after fuel gas injection, after carrying out tentatively mixing with air, recycling mixing arrangement mixes.
The utility model device is made up of external support board 1, center brace panel 2, blade 3 and jet pipe 4.External support board 1 is and has certain thickness metal sheet with center brace panel 2; Center brace panel 2 is equipped with a Rafael nozzle 4; The outer of center brace panel 2 is uniform multiple blades 3 circumferentially; The end of blade 3 is connected with external support board 1.
External support board 1 is the sheet metal that 1.5-2mm is thick, on external support board 1, has hole, and the shape and size in hole are consistent with intake manifold inner chamber and inlet mouth, is also processed with bolt hole 6 on external support board 1.The metal sheet structure of mixing arrangement can guarantee that it is arranged between intake manifold and cylinder cap easily, can not take too much motor installing space.
Center brace panel 2 is circular, thickness is the steel plate of 1.5-2mm, in center brace panel 2, be processed with circular hole, convergent jet pipe 7 and gradually expanding shape jet pipe 10 are equipped with respectively in circular hole both sides, form a Rafael nozzle 4, convergent jet pipe 7 and divergent nozzle 10 are threaded connection clamping in center brace panel 2 both sides, and prevent that by riveting method two sections of jet pipes from coming off.
At the uniform multiple blades 3 of external margin of center brace panel 2, the end of blade 3 is connected with external support board 1, and the crestal line of blade 3 and external support board 1 and inner support plate 2 are in same plane.The stalloy that described blade 3 is 1mm for thickness, it is shaped as from center brace panel 2 and becomes fan-shaped to external support board 1 direction, blade 3 entirety are mentioned ridge-shaped structure, and crestal line both sides are processed with multiple apertures of falling fish scale-shaped 5, form a triangle reducing passage between every two blades 3.
Rafael nozzle 4 is imported and exported diameter and is no more than the outside diameter of center brace panel, avoids the interference to flowing to blade air-flow.
Claims (9)
1. Multi-point jetting type gas/duel fuel engine combustion gas and air premixing appts, it is characterized in that: comprise intake duct, external support board, center brace panel, blade, jet pipe, honeycomb duct, the middle part of external support board arranges hole, external support board is arranged on intake duct, the hole of external support board is positioned in intake duct, the shape in hole is identical with intake duct sectional shape, center brace panel is positioned in hole, the two ends of blade are arranged on respectively in external support board and center brace panel, jet pipe is Rafael nozzle, Rafael nozzle comprises convergent jet pipe and divergent nozzle, the small end of convergent jet pipe arranges outside thread, the small end of divergent nozzle arranges internal thread, divergent nozzle is arranged on by its internal thread outside the outside thread of convergent jet pipe small end, the small end of convergent jet pipe and the small end of divergent nozzle are arranged in the circular hole at center brace panel middle part, the upper end portion of honeycomb duct is arranged on intake duct, the lower end part of honeycomb duct is in intake duct.
2. a kind of Multi-point jetting type gas/duel fuel engine combustion gas according to claim 1 and air premixing appts, it is characterized in that: blade integral is mentioned ridge-shaped structure, become fan-shaped from center brace panel to external support board direction, the crestal line both sides of blade are processed with the aperture of falling fish scale-shaped, between adjacent blades, form triangle reducing passage, the crestal line of blade and external support board and inner support plate are in same plane.
3. a kind of Multi-point jetting type gas/duel fuel engine combustion gas according to claim 1 and 2 and air premixing appts, is characterized in that: the diameter of the large end of convergent jet pipe and the large end of divergent nozzle is not more than center brace panel outside diameter.
4. a kind of Multi-point jetting type gas/duel fuel engine combustion gas according to claim 1 and 2 and air premixing appts, it is characterized in that: the small end of convergent jet pipe and the small end of divergent nozzle all arrange waist hole, when the small end of convergent jet pipe is positioned in the small end of divergent nozzle, two waist holes overlap.
5. a kind of Multi-point jetting type gas/duel fuel engine combustion gas according to claim 3 and air premixing appts, it is characterized in that: the small end of convergent jet pipe and the small end of divergent nozzle all arrange waist hole, when the small end of convergent jet pipe is positioned in the small end of divergent nozzle, two waist holes overlap.
6. a kind of Multi-point jetting type gas/duel fuel engine combustion gas according to claim 1 and 2 and air premixing appts, it is characterized in that: the underpart of honeycomb duct is straight tube, the center line of straight tube overlaps with the center line of intake duct, the endcapped of straight tube, on the tube wall of straight tube, be provided with fumarole, it is perpendicular that the jet a fluid stream direction that fumarole produces and the air of intake duct carry out flow path direction.
7. a kind of Multi-point jetting type gas/duel fuel engine combustion gas according to claim 3 and air premixing appts, it is characterized in that: the underpart of honeycomb duct is straight tube, the center line of straight tube overlaps with the center line of intake duct, the endcapped of straight tube, on the tube wall of straight tube, be provided with fumarole, it is perpendicular that the jet a fluid stream direction that fumarole produces and the air of intake duct carry out flow path direction.
8. a kind of Multi-point jetting type gas/duel fuel engine combustion gas according to claim 4 and air premixing appts, it is characterized in that: the underpart of honeycomb duct is straight tube, the center line of straight tube overlaps with the center line of intake duct, the endcapped of straight tube, on the tube wall of straight tube, be provided with fumarole, it is perpendicular that the jet a fluid stream direction that fumarole produces and the air of intake duct carry out flow path direction.
9. a kind of Multi-point jetting type gas/duel fuel engine combustion gas according to claim 5 and air premixing appts, it is characterized in that: the underpart of honeycomb duct is straight tube, the center line of straight tube overlaps with the center line of intake duct, the endcapped of straight tube, on the tube wall of straight tube, be provided with fumarole, it is perpendicular that the jet a fluid stream direction that fumarole produces and the air of intake duct carry out flow path direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420323088.6U CN203925792U (en) | 2014-06-17 | 2014-06-17 | A kind of Multi-point jetting type gas/duel fuel engine combustion gas and air premixing appts |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420323088.6U CN203925792U (en) | 2014-06-17 | 2014-06-17 | A kind of Multi-point jetting type gas/duel fuel engine combustion gas and air premixing appts |
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| Publication Number | Publication Date |
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| CN203925792U true CN203925792U (en) | 2014-11-05 |
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| CN201420323088.6U Expired - Fee Related CN203925792U (en) | 2014-06-17 | 2014-06-17 | A kind of Multi-point jetting type gas/duel fuel engine combustion gas and air premixing appts |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104018956A (en) * | 2014-06-17 | 2014-09-03 | 哈尔滨工程大学 | Multi-point injection gas/dual-fuel engine fuel gas and air premixing device |
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2014
- 2014-06-17 CN CN201420323088.6U patent/CN203925792U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104018956A (en) * | 2014-06-17 | 2014-09-03 | 哈尔滨工程大学 | Multi-point injection gas/dual-fuel engine fuel gas and air premixing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141105 Termination date: 20170617 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |