CN2067360U - Three-stream combustion chamber - Google Patents
Three-stream combustion chamber Download PDFInfo
- Publication number
- CN2067360U CN2067360U CN 90205918 CN90205918U CN2067360U CN 2067360 U CN2067360 U CN 2067360U CN 90205918 CN90205918 CN 90205918 CN 90205918 U CN90205918 U CN 90205918U CN 2067360 U CN2067360 U CN 2067360U
- Authority
- CN
- China
- Prior art keywords
- combustion chamber
- ansa
- apart
- piston
- annulus
- Prior art date
- 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.)
- Withdrawn
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 24
- 239000000203 mixture Substances 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 235000012489 doughnuts Nutrition 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000008246 gaseous mixture Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
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- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The utility model relates to a combustion chamber used on a high-speed diesel. The utility model further increases the mixture gas quality of the existing combustion chamber, and reduces the depth and the heat load of the combustion chamber. The piston top of the utility model is provided with three circular ring cambered surfaces and two annular arris which are formed by crossing every two adjacent circular ring cambered surfaces, and the center of a piston crown is provided with a conical boss.
Description
The utility model relates to the combustion chamber of using on a kind of high-speed diesel engine.
Disclose a kind of combustion system with double plume on Chinese patent 88106248.0, the structure of the top land of its combustion chamber is, has inside and outside two doughnuts, and the bottom surface circular arc of two doughnuts intersects and forms a pointed arc ridge, and there is a conical boss at center, piston top.After spraying into this combustion chamber, the oil bundle has only two arc surfaces owing to the combustion chamber, can only form two strands of eddy flows, have only an ansa to play comminution of fuel, be unfavorable for further improving mixed gas quality, and the volume that ansa occupies the combustion chamber is more, under the constant situation of combustion chamber volume, be unfavorable for further reducing combustion-chamber depth.
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art and a kind of higher mixed gas quality that has is provided, the three stream combustion chambers that combustion-chamber depth reduces.
The technical solution that the utility model is taked is: there is a conical boss at the top land centers of three stream combustion chambers, and its special character is: top land has three annulus cambered surfaces to be intersected the annular ansa form by two annulus cambered surfaces of facing mutually with two.
The utility model has following advantage than prior art:
1, mixed gas quality improves.Because three annulus cambered surfaces are arranged, after spraying into the combustion chamber, the oil bundle just formed three strands of eddy flows, and there are two ansas to play comminution of fuel, so just further improved mixed gas quality, gaseous mixture is distribution uniform in whole combustion chamber, and burning also just evenly, the heat utilization ratio height, the efficiency of combustion height.
2, the thermic load of piston reduces.Be evenly distributed by gaseous mixture, burning is even, and being heated of piston is also just even, the uniformity of temperature profile in its temperature field.
3, combustion-chamber depth reduces.Under the constant situation of combustion chamber volume, three annulus cambered surfaces have replaced two annulus cambered surfaces, the radius of curvature of each annulus cambered surface is reduced relatively, the height that is intersected two ansas that form by two annulus cambered surfaces of facing mutually is also low than an ansa, make the bottom surface, combustion chamber of piston flat relatively like this, reduce burning degree of depth purpose thereby reached.Because combustion-chamber depth reduces, the first piston ring increases apart from the distance of the burning bottom surface of piston on the piston, thereby reduces the thermic load of first ring, and the working condition of first ring is determining the overhaul phase of engine, like this, reduce the service life that first thermic load of encircling can increase engine.
The utility model will be described further in conjunction with the accompanying drawings.
Fig. 1 is a piston of combustion chamber top junction composition.
Fig. 2 is the top land vertical view.
In Fig. 1 and Fig. 2, the top land center has a conical boss 4, boss end face to be lower than plane, piston top.Top land has the arc radius R of 1,2,3, three annulus cambered surfaces of three annulus cambered surfaces
1, R
2, R
3, one of a ratio is little.Two annulus cambered surfaces of facing mutually intersect two annular ansas 5,6 of formation.The conical surface of conical boss 4 and the annulus cambered surface 3 of innermost ring are tangent.In the present embodiment, because R
1And R
2Radius less, and centre-to-centre spacing is bigger, is the height of control ansa 6, draws tangent plane 7 from annulus cambered surface 1 and intersects formation ansa 6 with annulus cambered surface 2, approximate parallel with the conical surface of conical boss 4 from the tangent plane 7 that annulus cambered surface 1 is drawn, the angle of inclination of tangent plane 7 is complementary with the jet angle of oil bundle.Annulus cambered surface 1 directly intersects with plane, piston top.
The meaning of symbol and best value are as follows in the accompanying drawing:
D is a piston diameter.
The combustion chamber openings diameter d
1=(0.66～0.8) D
The diameter d of ansa ring 6
2=(0.4～0.7) D
The diameter d of ansa ring 5
3=(0.13～0.66) D
Annulus cambered surface 1 minimum point is apart from piston top plane H
1=(0.045～0.12) D
Annulus cambered surface 2 minimum points are apart from piston top plane H
2=(0.08～0.14) D
Annulus cambered surface 3 minimum points are apart from piston top plane H
3=(0.066～0.13) D
Ansa 6 is apart from piston top plan range h
1=(0.047～0.10) D
Ansa 5 is apart from piston top plan range h
2=(0.04～0.1) D
The cone angle alpha of conical boss=120 °～150 °.
Claims (2)
1, a kind of three stream combustion chambers, there is a conical boss 4 at its top land center, it is characterized in that: top land has three annulus cambered surfaces 1,2,3 to be intersected the annular ansa 5,6 form by two annulus cambered surfaces of facing mutually with two.
2, according to the described three stream combustion chambers of claim 1, it is characterized in that:
The combustion chamber openings diameter d
1=(0.66～0.8) D
The diameter d of ansa ring 6
2=(0.4～0.7) D
The diameter d of ansa ring 5
3=(0.13～0.66) D
Annulus cambered surface 1 minimum point is apart from piston top plane H
1=(0.045～0.12) D
Annulus cambered surface 2 minimum points are apart from piston top plane H
2=(0.08～0.14) D
Annulus cambered surface 3 minimum points are apart from piston top plane H
3=(0.066～0.13) D
Ansa 6 is apart from piston top plan range h
1=(0.047～0.10) D
Ansa 5 is apart from piston top plan range h
2=(0.04～0.1) D.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90205918 CN2067360U (en) | 1990-05-10 | 1990-05-10 | Three-stream combustion chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90205918 CN2067360U (en) | 1990-05-10 | 1990-05-10 | Three-stream combustion chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2067360U true CN2067360U (en) | 1990-12-12 |
Family
ID=4886601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90205918 Withdrawn CN2067360U (en) | 1990-05-10 | 1990-05-10 | Three-stream combustion chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2067360U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101737145B (en) * | 2009-11-06 | 2011-07-20 | 北京理工大学 | Split swirl combustion chamber |
| CN103397951A (en) * | 2013-08-06 | 2013-11-20 | 江苏常工动力机械有限公司 | Piston combustion chamber structure |
-
1990
- 1990-05-10 CN CN 90205918 patent/CN2067360U/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101737145B (en) * | 2009-11-06 | 2011-07-20 | 北京理工大学 | Split swirl combustion chamber |
| CN103397951A (en) * | 2013-08-06 | 2013-11-20 | 江苏常工动力机械有限公司 | Piston combustion chamber structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |