CN209925113U - Gas engine piston top structure - Google Patents
Gas engine piston top structure Download PDFInfo
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- CN209925113U CN209925113U CN201920752954.6U CN201920752954U CN209925113U CN 209925113 U CN209925113 U CN 209925113U CN 201920752954 U CN201920752954 U CN 201920752954U CN 209925113 U CN209925113 U CN 209925113U
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- chamber portion
- chamber
- combustion chamber
- cavity part
- end opening
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Abstract
The utility model provides a gas engine piston crown structure, includes the piston body, the top surface center of piston body sets up the combustion chamber, the inner chamber of combustion chamber is connected by first chamber portion, second chamber portion, third chamber portion and constitutes, first chamber portion is located the opening of combustion chamber, is the toper structure that the upper end opening is little, the lower extreme opening is big, third chamber portion is located the bottom of combustion chamber, and the bottom surface center of third chamber portion is towards the bellied arc surface of combustion chamber opening, through arc annular groove transitional coupling between the circumference of arc surface and the internal perisporium of third chamber portion, the second chamber portion is between first chamber portion, third chamber portion, the second chamber portion is the toper structure of invering that the upper end opening is big, the lower extreme opening is little for the upper end opening of second chamber portion and the lower extreme opening intercommunication of first chamber portion, the lower extreme opening of second chamber portion and the upper end opening intercommunication of third chamber portion. The utility model discloses simple structure, processing cost hang down, can effectively improve gas burning rate and burning sufficient rate, avoid long-pending charcoal, guarantee the gas engine and normally work.
Description
Technical Field
The utility model relates to a gas engine field, in particular to gas engine piston crown structure.
Background
The piston top structure and the shape that general on the gas engine field at present are shown as figure 1, and the combustion chamber at piston top is uncovered form, and the shape is like basin and dark, and there are two darker screw holes combustion chamber bottom for installation hoisting screw when dismouting piston.
The piston top structure has two problems, namely, after the fuel gas is sprayed into the combustion chamber at the top of the piston, most of the fuel gas is extruded out of the combustion chamber, as shown in fig. 2, the extruded fuel gas is mixed with air in a larger space, so that the fuel gas and the air are not fully mixed, the overall combustion rate and the combustion sufficient rate are seriously reduced, and further carbon deposition is generated due to insufficient combustion; secondly, the existence of two hoisting bolt holes has great hidden trouble, because of the threaded holes, carbon deposition generated by insufficient fuel combustion can be accumulated in the threads of the threaded holes, so that the detonation is caused by partial ignition of fuel gas before the ignition of the spark plug due to the accumulated heat of the carbon deposition, and the normal work of the gas engine is seriously influenced.
Disclosure of Invention
The utility model aims at prior art not enough, provide a gas engine piston crown structure, its simple structure, processing cost are low, can effectively improve gas combustion rate and burning sufficient rate, avoid long-pending charcoal, guarantee that the gas engine normally works.
The technical scheme of the utility model is that: the utility model provides a gas engine piston crown structure, includes the piston body, the top surface center of piston body sets up the combustion chamber, the inner chamber of combustion chamber is connected by first chamber portion, second chamber portion, third chamber portion and constitutes, first chamber portion is located the opening of combustion chamber, is the toper structure that the upper end opening is little, the lower extreme opening is big, third chamber portion is located the bottom of combustion chamber, and the bottom surface center of third chamber portion is towards the bellied arc surface of combustion chamber opening, through arc annular groove transitional coupling between the circumference of arc surface and the internal perisporium of third chamber portion, the second chamber portion is between first chamber portion, third chamber portion, the second chamber portion is the toper structure of invering that the upper end opening is big, the lower extreme opening is little for the upper end opening of second chamber portion and the lower extreme opening intercommunication of first chamber portion, the lower extreme opening of second chamber portion and the upper end opening intercommunication of third chamber portion.
And the upper end opening of the first cavity part is in transition connection with the top surface of the piston body through an arc.
And an included angle alpha between the inner peripheral wall of the first cavity part and a central line of the combustion chamber is 10 degrees.
And an included angle beta between the inner peripheral wall of the second cavity and the central line of the combustion chamber is 3 degrees.
Adopt above-mentioned technical scheme to have following beneficial effect:
the utility model discloses gas engine piston top structure includes the piston body, and the top surface center of piston body sets up the combustion chamber, provides the space of gas burning. The inner chamber of the combustion chamber is formed by connecting a first chamber part, a second chamber part and a third chamber part, the first chamber part is positioned at the opening of the combustion chamber and is of a conical structure with a small upper end opening and a large lower end opening, the third chamber part is positioned at the bottom of the combustion chamber, the center of the bottom surface of the third chamber part is an arc surface protruding towards the opening of the combustion chamber, the circumference of the arc surface is in transitional connection with the inner peripheral wall of the third chamber part through an arc ring groove, the strength of the bottom structure of the combustion chamber is enhanced, and the requirement of high-power operation of a gas engine is met. The second cavity is located between first chamber portion, the third chamber portion, the second chamber portion is the inverted cone structure that the upper end opening is big, the lower extreme opening is little, the upper end opening of second chamber portion communicates with the lower extreme opening of first chamber portion, the lower extreme opening of second chamber portion communicates with the upper end opening of third chamber portion, the gas that gets into the combustion chamber from the combustion chamber opening, through first chamber portion, second chamber portion, third chamber portion, when flowing back to the combustion chamber opening part along the internal perisporium of combustion chamber, because the internal perisporium of first chamber portion is the cone structure that the upper end opening is little, the lower extreme opening is big, to the gas direction of flowing back, make the gas of flowing back flow towards the middle part of combustion chamber, most gas gathering is in the combustion chamber, effectively promote gas and air intensive mixing, improve the combustion rate and the burning charge rate of gas, reduce the long-pending charcoal production rate. In addition, because the hoisting threaded hole is cancelled, the carbon deposit in the combustion chamber is further reduced, and the probability of knocking caused by carbon deposit and heat accumulation is reduced.
The following further description is made with reference to the accompanying drawings and detailed description.
Drawings
FIG. 1 is a schematic diagram of a piston crown of the prior art;
FIG. 2 is a gas flow diagram of a piston crown structure common to the background art;
FIG. 3 is a schematic structural view of the present invention;
fig. 4 is a gas flow diagram of the present invention.
In the drawing, 1 is a piston body, 2 is a combustion chamber, 21 is a first chamber part, 22 is a second chamber part, 23 is a third chamber part, 24 is an arc surface, and 25 is an arc ring groove.
Detailed Description
Referring to fig. 3 and 4, a specific embodiment of a gas engine piston crown structure is shown. The piston body is a conventional piston body in the field of gas engines and comprises a sealing ring groove for installing a sealing ring, wherein a cooling medium flow channel is arranged in the piston body, and the cooling medium flow channel is conventional equipment in the field of gas engines, and in the embodiment, the diameter of the piston body is 210 mm. The combustion chamber 2 is arranged in the center of the top surface of the piston body 1, an inner cavity of the combustion chamber 2 is formed by connecting a first cavity part 21, a second cavity part 22 and a third cavity part 23, the first cavity part 21 is located at an opening of the combustion chamber 2 and is of a conical structure with a small upper end opening and a large lower end opening, specifically, the upper end opening of the first cavity part 21 is in arc transition connection with the top surface of the piston body 1, an included angle alpha between the inner peripheral wall of the first cavity part 21 and the center line of the combustion chamber 2 is 10 degrees, and the depth of the first cavity part is 14.5 mm. Third chamber portion 23 is located the bottom of combustion chamber 2, and the bottom surface center of third chamber portion 23 is towards the bellied arc surface 24 of combustion chamber 2 opening, through arc annular 25 transitional coupling between the circumference of arc surface 24 and the internal perisporium of third chamber portion 23, and the summit of this arc surface is 54mm apart from the open-ended height of combustion chamber, and the minimum distance of arc annular is 61mm apart from the open-ended height of combustion chamber. Second chamber portion 22 is located between first chamber portion 21, the third chamber portion 23, second chamber portion 22 is the big, the little inverted cone structure of lower extreme opening of upper end opening, the upper end opening of second chamber portion 22 and the lower extreme opening intercommunication of first chamber portion 21, the lower extreme opening of second chamber portion 22 and the upper end opening intercommunication of third chamber portion 23, in this embodiment, the degree of depth of second chamber portion is 28mm, contained angle beta between second chamber portion 22 internal perisporium and the combustion chamber 2 place central line is 3.
The utility model discloses an operating principle does, utilizes specific hoist and mount frock to assemble the piston in the cylinder liner, has the interval space between piston top surface and the cylinder head. Get into the gas of combustion chamber from the combustion chamber opening, through first chamber portion, the second chamber portion, the third chamber portion, when internal perisporium along the combustion chamber flows back to the combustion chamber opening part, because the internal perisporium of first chamber portion is that the upper end opening is little, the big toper structure of lower extreme opening, the gas direction to the refluence, make the gas of refluence flow towards the middle part of combustion chamber, most gas gathering is in the combustion chamber, only few gas is extruded the combustion chamber, be located the space between cylinder head and the piston top surface, most gas is in comparatively constrictive combustion chamber and air intensive mixing, when the spark plug is igniteed, effectively improve the combustion rate and the burning of gas and fill the rate, avoid producing long-pending charcoal because of the gas burning is not abundant, reduce long-pending charcoal production rate. In addition, because the hoisting threaded hole is cancelled, the carbon deposit in the combustion chamber is further reduced, and the probability of knocking caused by carbon deposit and heat accumulation is reduced.
Claims (4)
1. The gas engine piston top structure comprises a piston body (1), wherein a combustion chamber (2) is arranged at the center of the top surface of the piston body (1), and is characterized in that: the inner cavity of the combustion chamber (2) is formed by connecting a first cavity part (21), a second cavity part (22) and a third cavity part (23), the first cavity part (21) is positioned at the opening of the combustion chamber (2) and is of a conical structure with a small upper end opening and a large lower end opening, the third cavity part (23) is positioned at the bottom of the combustion chamber (2), the center of the bottom surface of the third cavity part (23) is an arc surface (24) protruding towards the opening of the combustion chamber (2), the circumference of the arc surface (24) is in transitional connection with the inner peripheral wall of the third cavity part (23) through an arc ring groove (25), the second cavity part (22) is positioned between the first cavity part (21) and the third cavity part (23), the second cavity part (22) is of an inverted cone-shaped structure with a large upper end opening and a small lower end opening, the upper end opening of the second cavity part (22) is communicated with the lower end opening of the first cavity part (21), and the lower end opening of the second cavity part (22) is communicated with the upper end opening of the third cavity part (23).
2. A gas engine piston crown structure according to claim 1, in which: the upper end opening of the first cavity part (21) is in transition connection with the top surface of the piston body (1) through an arc.
3. A gas engine piston crown structure according to claim 1, in which: the included angle alpha between the inner peripheral wall of the first cavity part (21) and the central line of the combustion chamber (2) is 10 degrees.
4. A gas engine piston crown structure according to claim 1, in which: and an included angle beta between the inner peripheral wall of the second cavity part (22) and the central line of the combustion chamber (2) is 3 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920752954.6U CN209925113U (en) | 2019-05-23 | 2019-05-23 | Gas engine piston top structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920752954.6U CN209925113U (en) | 2019-05-23 | 2019-05-23 | Gas engine piston top structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209925113U true CN209925113U (en) | 2020-01-10 |
Family
ID=69091474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920752954.6U Active CN209925113U (en) | 2019-05-23 | 2019-05-23 | Gas engine piston top structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209925113U (en) |
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2019
- 2019-05-23 CN CN201920752954.6U patent/CN209925113U/en active Active
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Address after: 400000 block B, Jiulong Park, Jiulongpo District, Chongqing Patentee after: Chongqing Pushi New Energy Technology Co.,Ltd. Address before: 400000 block B, Jiulong Park, Jiulongpo District, Chongqing Patentee before: CHONGQING PUSH MECHANISM Co.,Ltd. |