CN215979597U - Strong-flow-squeezing high-turbulence centrifugal piston combustion chamber and combustion system - Google Patents
Strong-flow-squeezing high-turbulence centrifugal piston combustion chamber and combustion system Download PDFInfo
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- CN215979597U CN215979597U CN202121756036.4U CN202121756036U CN215979597U CN 215979597 U CN215979597 U CN 215979597U CN 202121756036 U CN202121756036 U CN 202121756036U CN 215979597 U CN215979597 U CN 215979597U
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Abstract
The utility model discloses a strong flow-extruding high-turbulence centrifugal piston combustion chamber and a combustion system, belongs to the technical field of power equipment, and solves the problem that a traditional combustion chamber piston cannot realize high-efficiency combustion. This combustion chamber includes cylinder cap and piston, piston and cylinder cap between be formed with the combustion chamber cavity, the combustion chamber cavity include combustion chamber and crowded flow chamber, the combustion chamber be located the top of piston, crowded flow chamber be located between the bottom surface of the top surface of piston and cylinder cap, combustion chamber and crowded flow chamber intercommunication, the combustion chamber constitute by a plurality of pits, it is a plurality of the pit communicate each other near one side at piston center, it is a plurality of the pit be close to one side looks interval arrangement of piston outer fringe. The strong-squish-flow high-turbulence centrifugal piston combustion chamber and the combustion system can meet the indexes of high-efficiency lean combustion, lowest pollutant emission, optimal power and the like of a gas engine, and have the characteristics of convenience in use and strong practicability.
Description
Technical Field
The utility model relates to the technical field of power equipment, in particular to a strong flow-extruding high-turbulence centrifugal piston combustion chamber and a combustion system.
Background
The gas engine using combustible gases such as natural gas, hydrogen, biogas, landfill gas, hydrogen-rich refined tail gas, biomass gas and the like as fuels has the characteristics of cleanness, environmental protection, high efficiency and the like, and is widely applied to the fields of power generation, well drilling, ships, distributed energy sources and the like. The gas engines can effectively realize high-efficiency combustion and furthest reduce pollutant emission, and the high-efficiency combustion in cylinders of the gas engines, namely the structural design optimization of combustion chambers, is one of key core technologies for realizing performance indexes of the engines, such as high heat efficiency, strong dynamic property, low emission, high reliability and the like. The gas engine is influenced by the characteristics of gas fuel, ignition type and energy, intake and exhaust valves, air passages and the like, and the design matching requirement of the in-cylinder combustion structural type of the engine is higher and higher.
The combustion chamber of the existing gas engine generally adopts the forms of flaring shallow basin type, necking shallow basin type, straight barrel shallow basin type and the like. With the increasing energy efficiency and the severe requirements of the international society on the emission regulations, the gas engine is developed to the target of higher efficiency, stronger power, lower emission and higher reliability (referred to as "four high"), and the traditional combustion chamber structure for the gas engine at present cannot meet the requirements of "four high" performance and the like.
The traditional combustion chamber with the shallow-basin type piston has a series of problems of slow flame propagation, fast central combustion, slow peripheral combustion, high nitrogen oxide product, overhigh local combustion temperature, easy detonation and the like. The structure of the combustion chamber determines the key 'neck' technical problems of low efficiency, insufficient power, high emission and the like of the gas engine.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is to provide a strong squish flow high turbulence centrifugal piston combustion chamber and a combustion system aiming at the defects of the prior art, and the technology of combining a high energy ignition precombustion chamber and a strong squish flow high turbulence centrifugal precombustion chamber piston is adopted, so that the indexes of high-efficiency lean combustion, lowest pollutant emission, optimal power and the like of a gas engine can be met, and the strong squish flow high turbulence centrifugal piston combustion chamber and the combustion system have the characteristics of wide application range and strong practicability.
The technical scheme adopted by the utility model is as follows: the utility model provides a centrifugal piston combustion chamber of high torrent is flowed to strong crowded, includes cylinder cap and piston, piston and cylinder cap between be formed with the combustion chamber cavity, the combustion chamber cavity include combustion chamber and crowded flow chamber, the combustion chamber be located the top of piston, crowded flow chamber be located between the top surface of piston and the bottom surface of cylinder cap, combustion chamber and crowded flow chamber intercommunication, the combustion chamber constitute by a plurality of pits, it is a plurality of the pit be close to one side intercommunication each other at the piston center, a plurality of the pit be close to one side looks interval arrangement of piston outer fringe.
As a further improvement, the top surface of the pit is consistent with the bottom surface in shape, and the area of the top surface of the pit is larger than that of the bottom surface.
Furthermore, the top surface and the bottom surface of the concave pit are connected through an arc-shaped surface.
Further, the transverse section of the pit is blade-shaped, and the longitudinal sectional area of the pit gradually increases from inside to outside along the radius of the piston.
Further, the top surface profile of pit includes first circular arc, first straight line, second circular arc and second straight line, the both ends of first straight line tangent with the one end of first circular arc, second circular arc respectively, the one end of second straight line is tangent with the other end of second circular arc, adjacent two the pit all is connected through the third circular arc, just the both ends of third circular arc are tangent with the other end of first circular arc, second straight line respectively.
Further, the radius of the first circular arc is larger than that of the second circular arc, and the radius of the second circular arc is larger than that of the third circular arc.
Furthermore, a cylinder cover above the pits is provided with a precombustion chamber with jet holes, an ignition device is arranged in the precombustion chamber, the precombustion chamber is positioned at the center of a combustion chamber cavity, each pit corresponds to one jet hole, and the jet direction of the jet hole is intersected with the first straight line.
Furthermore, the ratio of the diameter of the circumscribed circle of the second arcs to the diameter of the piston is 0.50-0.80, and the ratio of the diameter of the inscribed circle of the third arcs to the diameter of the piston is 0.15-0.30.
Further, the ratio of the area of the top surface of the piston outside the recess to the area of the top surface of the entire piston is 0.6 to 0.8.
A strong squish flow high turbulence centrifugal piston combustion system comprises the strong squish flow high turbulence centrifugal piston combustion chamber.
Advantageous effects
Compared with the prior art, the utility model has the following advantages:
the utility model relates to a strong extrusion flow high turbulence centrifugal piston combustion chamber and a combustion system, which mainly comprise a precombustion chamber, a combustion chamber and an extrusion flow chamber, wherein the combustion chamber can form higher turbulence intensity when a centrifugal piston reaches an upper dead center, simultaneously form strong eddy and tumble in each pit of the combustion chamber, and realize a rapid combustion effect by matching with jet flames of the precombustion chamber.
Drawings
FIG. 1 is a schematic top view of the present invention;
FIG. 2 is a schematic sectional view A-A of FIG. 1;
FIG. 3 is a schematic sectional view of B-B in FIG. 1.
Wherein: 1-combustion chamber, 2-extrusion chamber, 3-precombustion chamber, 4-cooling cavity, 5-pit, 6-ignition device, 7-extrusion surface, 8-jet flame, 9-cylinder cover, 10-centrifugal piston, 11-cylinder barrel, 12-jet hole, 13-first circular arc, 14-first straight line, 15-second circular arc, 16-second straight line, 17-third circular arc and 18-arc surface.
Detailed Description
The utility model will be further described with reference to specific embodiments shown in the drawings.
Referring to fig. 1-3, the centrifugal piston combustion chamber with strong squish flow and high turbulence of the utility model comprises a cylinder cover 9 and a piston 10, a combustion chamber cavity is formed between the piston 10 and the cylinder cover 9, the combustion chamber cavity comprises a combustion chamber 1 and a squish chamber 2, the combustion chamber 1 is positioned at the top of the piston 10, the squish chamber 2 is positioned between the top surface of the piston 10 and the bottom surface of the cylinder cover 9, the combustion chamber 1 is communicated with the squish chamber 2, the combustion chamber 1 is composed of a plurality of pits 5, one sides of the plurality of pits 5 close to the center of the piston 10 are communicated with each other, one sides of the plurality of pits 5 close to the outer edge of the piston 10 are arranged at intervals, through mixed gas around an ignition device 6 in a precombustion chamber 3, high-energy flame is ignited to ignite lean gas in the combustion chamber 1 through an injection hole 12, lean combustion is realized, the combustion chamber 1 can form high turbulence intensity when the piston 10 reaches an upper dead center, meanwhile, strong vortex and tumble flows are formed in each pit 5 of the combustion chamber 1, a rapid combustion effect can be realized by matching with the jet flame 8 of the precombustion chamber 3, when the centrifugal piston 10 moves upwards to the left and right of the top dead center, the flow extrusion chamber 2 formed between the top surface of the piston 10 and the bottom surface of the cylinder cover 9 is a strong flow extrusion combustion chamber, and when the centrifugal piston 10 reaches the top dead center, the flow extrusion chamber 2 can effectively extrude mixed gas on the top surface of the centrifugal piston 10 into the combustion chamber 1 in a strong flow extrusion mode, so that the turbulence of the mixed gas in the combustion chamber 1 is accelerated.
Specifically, the top surface shape of pit 5 is unanimous with the bottom surface shape, and the top surface area of pit 5 is greater than the bottom surface area, links up through arcwall face 18 between the top surface of pit 5 and the bottom surface, and when the flame that jet orifice 12 sprays arrived pit 5, can form strong vortex and tumble, and the combustion effect is better.
Preferably, the horizontal cross-section of pit 5 is the bladelike, and the vertical sectional area of pit 5 increases gradually from inside to outside along the radius of piston 10, the horizontal cross-section of pit 5 is drawn from overlooking the direction, the horizontal cross-section of pit 5 draws from the side view direction, a plurality of pits 5 are equal with prechamber 3's 12 injection holes in quantity, and the one-to-one, the high energy flame that jets out is along pit 5 vertical center and horizontal center diffusion burning outward, realize high-speed ignition, a plurality of pits 5 are n, the value of n is: 2. 3, 4, 5, 6, 7, 8, 9, 10, 11, 12.
Further, the top surface profile of the pit 5 comprises a first circular arc 13, a first straight line 14, a second circular arc 15 and a second straight line 16, two ends of the first straight line 14 are respectively tangent to one ends of the first circular arc 13 and the second circular arc 15, one end of the second straight line 16 is tangent to the other end of the second circular arc 15, two adjacent pits 5 are connected through a third circular arc 17, two ends of the third circular arc 17 are respectively tangent to the other ends of the first circular arc 13 and the second straight line 16, and an area surrounded by the pits 5 is in a plum blossom shape, so that combustion flame generates stronger vortex and tumble in the plum blossom shape.
Further, the radius of first circular arc 13 is greater than the radius of second circular arc 15, and the radius of second circular arc 15 is greater than the radius of third circular arc 17, and the radian is different on both sides about pit 5 for when combustion chamber 1 burns, can produce centrifugal effect, make the burning more abundant.
Furthermore, a cylinder cover 9 above the pits 5 is provided with a precombustion chamber 3 with jet holes 12, an ignition device 6 is arranged in the precombustion chamber 3, the precombustion chamber 3 is positioned at the center of a combustion chamber cavity, each pit 5 corresponds to one jet hole 12, the jet direction of the jet hole 12 is intersected with a first straight line 14, jet flames 8 of the jet holes 12 are jetted to the first straight line 14, the flames are divided into two parts, the flames on the left side and the right side are rapidly separated, the combustion chamber 1 is ignited, and rapid diffusion combustion is realized.
Furthermore, the ratio of the diameter of the circumcircle of the second arcs 15 to the diameter of the piston 10 is 0.50-0.80, the ratio of the diameter of the inscribed circle of the third arcs 17 to the diameter of the piston 10 is 0.15-0.30, the ratio of the area of the top surface of the piston 10 outside the pit 5 to the area of the top surface of the whole piston 10 is 0.6-0.8, the ratio of the height of the squish chamber 2 to the diameter of the piston 10 is 0.005-0.01, the combustion chamber 1 with different compression ratios, squish intensity and turbulence intensity is designed according to the actual application requirements, so as to realize the optimal turbulence, squish and ignition energy states of different fuels under the lean combustion state, further accelerate the flame propagation speed, accelerate the turbulence of the mixed gas in the combustion chamber 1, improve the combustion efficiency, and achieve the target requirements of reducing pollutant emission, thereby realizing the optimal comprehensive indexes of gas engine such as economy, emission performance, dynamic performance and the like, so that the mixed gas can enter the combustion chamber 1.
Furthermore, a cooling cavity 4 is arranged at the lower part of the pit 5, so that forced cooling of the top combustion chamber 1 of the centrifugal piston 10 is realized, the temperature of the top combustion chamber 1 is reduced, and the operational reliability of the piston is improved.
Further, the injection angle gamma of the injection hole 12 ranges from 90 degrees to 160 degrees, when the high-energy ignition of the precombustion chamber 3 is started, the high-energy flame in the precombustion chamber 3 rapidly injects the flame to the bottom of the center of the pit 5 along the injection hole angle gamma, and rapidly diffuses and burns in the pit 5 along the transverse center and the periphery of the longitudinal center.
A strong squish flow high turbulence centrifugal piston combustion system comprises the strong squish flow high turbulence centrifugal piston combustion chamber.
When the strong squish flow high turbulence centrifugal piston combustion chamber is used, the ignition device 6 in the precombustion chamber 3 is used for igniting surrounding mixed gas so as to realize that high-energy flame ignites lean gas in the combustion chamber 1 through the injection hole 12, thereby realizing lean combustion, the combustion chamber 1 can form higher turbulence intensity when the centrifugal piston 10 reaches an upper dead center, and simultaneously form strong vortex and tumble in each pit 5 of the combustion chamber 1, the jet flame of the precombustion chamber 3 can realize a quick combustion effect, the squish chamber 2 can effectively extrude the mixed gas on the top surface of the piston 10 into the combustion chamber 1 in a strong squish flow mode when the piston 10 reaches the upper dead center, thereby accelerating the turbulence of the mixed gas in the combustion chamber 1 and realizing a better combustion effect. According to the centrifugal piston combustion chamber with the strong flow extrusion and the high turbulence, the combustion efficiency is greatly improved through the innovative design of the structural shape of the combustion chamber, the matching of a high-energy ignition technology and the strong cooling design of the combustion chamber, so that the design requirements of high-efficiency mixing, lean combustion and lower emission of a gas engine are met, and the indexes of the engine, such as the thermal efficiency, the economy, the dynamic property, the reliability and the like, are improved.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various changes and modifications without departing from the structure of the utility model, which will not affect the effect of the utility model and the practicability of the patent.
Claims (10)
1. The utility model provides a centrifugal piston combustion chamber of high torrent of strong crowded flow, includes cylinder cap (9) and piston (10), characterized in that, piston (10) and cylinder cap (9) between be formed with the combustion chamber cavity, the combustion chamber cavity include combustion chamber (1) and crowded flow room (2), combustion chamber (1) be located the top of piston (10), crowded flow room (2) be located between the top surface of piston (10) and the bottom surface of cylinder cap (9), combustion chamber (1) and crowded flow room (2) intercommunication, combustion chamber (1) constitute by a plurality of pit (5), it is a plurality of pit (5) be close to the one side intercommunication in piston (10) center, a plurality of pit (5) be close to one side looks interval arrangement of piston (10) outer fringe.
2. A high squish flow high turbulence centrifugal piston combustor according to claim 1, characterized in that the top surface shape of said dimples (5) is congruent with the bottom surface shape, and the top surface area of said dimples (5) is larger than the bottom surface area.
3. A high squish flow high turbulence centrifugal piston combustor according to claim 2, characterized in that the top and bottom surfaces of the pits (5) are joined by an arc shaped surface (18).
4. A high squish flow high turbulence centrifugal piston combustor according to claim 1, characterized in that the transverse cross section of the dimples (5) is blade-like and the longitudinal cross section area of the dimples (5) increases gradually from the inside to the outside along the radius of the piston (10).
5. A high squish flow and high turbulence centrifugal piston combustion chamber as claimed in claim 1, characterized in that the top surface profile of the dimples (5) comprises a first circular arc (13), a first straight line (14), a second circular arc (15) and a second straight line (16), both ends of the first straight line (14) are tangent to one end of the first circular arc (13) and one end of the second circular arc (15), one end of the second straight line (16) is tangent to the other end of the second circular arc (15), two adjacent dimples (5) are connected by a third circular arc (17), and both ends of the third circular arc (17) are tangent to the other ends of the first circular arc (13) and the second straight line (16).
6. A high squish flow high turbulence centrifugal piston combustor according to claim 5, characterized in that the radius of the first circular arc (13) is larger than the radius of the second circular arc (15) and the radius of the second circular arc (15) is larger than the radius of the third circular arc (17).
7. A high turbulence centrifugal piston combustion chamber as in claim 5, characterized by that, there is a precombustion chamber (3) with jet orifice (12) on the cylinder cover (9) above the said pit (5), there is an ignition device (6) in the said precombustion chamber (3), the said precombustion chamber (3) locates at the centre of the combustion chamber cavity, each said pit (5) corresponds to a jet orifice (12), and the jet direction of the said jet orifice (12) intersects the first straight line (14).
8. A high squish flow high turbulence centrifugal piston combustor according to claim 5, characterized in that the ratio of the diameter of the circumscribed circle of said second plurality of circular arcs (15) to the diameter of the piston (10) is 0.50-0.80, and the ratio of the diameter of the inscribed circle of said third plurality of circular arcs (17) to the diameter of the piston (10) is 0.15-0.30.
9. A high squish flow high turbulence centrifugal piston combustor according to claim 1, characterized in that the ratio of the top surface area of the piston (10) outside the pit (5) to the top surface area of the entire piston (10) is 0.6-0.8.
10. A high squish flow high turbulence centrifugal piston combustion system comprising a high squish flow high turbulence centrifugal piston combustion chamber as claimed in any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121756036.4U CN215979597U (en) | 2021-07-30 | 2021-07-30 | Strong-flow-squeezing high-turbulence centrifugal piston combustion chamber and combustion system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121756036.4U CN215979597U (en) | 2021-07-30 | 2021-07-30 | Strong-flow-squeezing high-turbulence centrifugal piston combustion chamber and combustion system |
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| CN215979597U true CN215979597U (en) | 2022-03-08 |
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| CN202121756036.4U Active CN215979597U (en) | 2021-07-30 | 2021-07-30 | Strong-flow-squeezing high-turbulence centrifugal piston combustion chamber and combustion system |
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| GR01 | Patent grant | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20230117 Address after: No.88 Tianqiao West Road, Yulin City, Guangxi Zhuang Autonomous Region Patentee after: Guangxi Yuchai Ship Electric Power Co.,Ltd. Address before: No.88 Tianqiao West Road, Yulin City, Guangxi Zhuang Autonomous Region Patentee before: Guangxi Yuchai Machinery Co.,Ltd. |
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| TR01 | Transfer of patent right |