CN205191557U - Combustion chamber anti -backfire structure - Google Patents
Combustion chamber anti -backfire structure Download PDFInfo
- Publication number
- CN205191557U CN205191557U CN201520925240.2U CN201520925240U CN205191557U CN 205191557 U CN205191557 U CN 205191557U CN 201520925240 U CN201520925240 U CN 201520925240U CN 205191557 U CN205191557 U CN 205191557U
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- China
- Prior art keywords
- combustion chamber
- ring cavity
- fuel nozzle
- fuel injector
- nozzle
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Abstract
The utility model relates to a combustion chamber anti -backfire structure, including combustion chamber casing, electric nozzle, fuel injector, fuel injector installs on the casing of combustion chamber, and electric nozzle installs before fuel injector and lies in the combustion chamber, fuel injector radially open and have the nozzle opening, form the ring cavity between fuel injector and the casing, the ring cavity is a variable cross -section structure, variable cross -section structure minimum at the cross sectional area who is lieing in electric nozzle terminal surface department for the ring cavity. The utility model discloses an improve in current structure, the simple preparation is feasible, and the effect is showing, and the effectual combustion efficiency that has guaranteed also that electric nozzle is not burnt out.
Description
Technical field
The utility model relates to a kind of combustion chamber anti-backfire structure.
Background technology
Combustion chamber is one of large parts of engine three, and in it, chemical reaction occurring, is heat energy by the chemical energy of fuel, allowable temperature before the pressure-air after heating compressor pressure to turbine.Generally, the seed region of fuel in combustion chamber and air carry out premixed combustion, light fuel and the air of abundant premix in primary zone.When fuel combustion, gas expansion causes the instantaneous reduction of pressure, makes sparking plug forefoot area produce negative pressure, inhales near, produces tempering, cause combustion zone to be removed from ideal position, thus reduce burner efficiency, even by sparking plug scaling loss by combustion zone to sparking plug forefoot area.
Summary of the invention
The purpose of this utility model is to provide a kind of anti-backfire structure, can reach raising burner efficiency, avoids the object of sparking plug scaling loss.
The technical solution of the utility model is, combustion chamber anti-backfire structure comprises burning chamber shell, sparking plug, fuel nozzle, fuel nozzle is arranged on burning chamber shell, sparking plug to be arranged on before fuel nozzle and to be positioned at combustion chamber, described fuel nozzle radial direction has nozzle opening, ring cavity is formed between described fuel nozzle and housing, the fuel blending that pressure-air and nozzle opening spray flows to outside ring cavity, described ring cavity is a variable section structure, and described variable section structure is that the area of section that ring cavity is being positioned at sparking plug end is minimum.The variable section structure of described ring cavity is by shell inner surface inwardly protruding or/and fuel nozzle outer radial outer lug is formed.
The utility model in use, due to minimum at the area of sparking plug end face, fuel is rear and pressure-air premix from nozzle opening ejection, the passage flowing through convergent is expanded to smallest cross-sectional place, pressure raises, eliminate the negative pressure because gas expansion produces, thus sparking plug forefoot area can not be made to produce negative pressure, effectively prevent tempering phenomenon.The utility model by improving in existing structure, and method is simple and feasible, Be very effective, effectively ensure that efficiency of combustion, also ensure that sparking plug is not burnt.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
As shown in the figure, combustion chamber anti-backfire structure comprises burning chamber shell 1, sparking plug 2, fuel nozzle 3, fuel nozzle 3 is arranged on burning chamber shell 1, be positioned at combustion chamber before sparking plug 2 is arranged on fuel nozzle 3, described fuel nozzle 3 radial direction has nozzle opening 5, ring cavity 4 is formed between described fuel nozzle and housing, the fuel blending that pressure-air and nozzle opening 5 spray flows to outside ring cavity 4, described ring cavity 4 is a variable section structure, and described variable section structure is that the area of section that ring cavity 4 is being positioned at sparking plug end face 6 place is minimum.The variable section structure of described ring cavity 4 is by shell inner surface inwardly protruding or/and fuel nozzle 3 outer radial outer lug is formed.
Claims (2)
1. a combustion chamber anti-backfire structure, it is characterized in that, described structure comprises burning chamber shell (1), sparking plug (2), fuel nozzle (3), fuel nozzle (3) is arranged on burning chamber shell (1), it is front and be positioned at combustion chamber that sparking plug (2) is arranged on fuel nozzle (3), described fuel nozzle (3) radial direction has nozzle opening (5), ring cavity (4) is formed between fuel nozzle and housing, the fuel blending that pressure-air and nozzle opening (5) spray flows to ring cavity (4) outward, described ring cavity (4) is a variable section structure, described variable section structure is that the area of section that ring cavity (4) is being positioned at sparking plug end face (6) place is minimum.
2. combustion chamber as claimed in claim 1 anti-backfire structure, is characterized in that, the variable section structure of described ring cavity (4) is by shell inner surface inwardly protruding or/and fuel nozzle (3) outer radial outer lug is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520925240.2U CN205191557U (en) | 2015-11-19 | 2015-11-19 | Combustion chamber anti -backfire structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520925240.2U CN205191557U (en) | 2015-11-19 | 2015-11-19 | Combustion chamber anti -backfire structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205191557U true CN205191557U (en) | 2016-04-27 |
Family
ID=55784540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520925240.2U Active CN205191557U (en) | 2015-11-19 | 2015-11-19 | Combustion chamber anti -backfire structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205191557U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105240847A (en) * | 2015-11-19 | 2016-01-13 | 哈尔滨东安发动机（集团）有限公司 | Anti-backfire structure of combustion chamber |
-
2015
- 2015-11-19 CN CN201520925240.2U patent/CN205191557U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105240847A (en) * | 2015-11-19 | 2016-01-13 | 哈尔滨东安发动机（集团）有限公司 | Anti-backfire structure of combustion chamber |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |