CN215633381U - Piston top, piston and engine - Google Patents
Piston top, piston and engine Download PDFInfo
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- CN215633381U CN215633381U CN202121072667.4U CN202121072667U CN215633381U CN 215633381 U CN215633381 U CN 215633381U CN 202121072667 U CN202121072667 U CN 202121072667U CN 215633381 U CN215633381 U CN 215633381U
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- piston
- throat
- cooling oil
- oil cavity
- internal cooling
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Abstract
The utility model relates to the technical field of engines, and discloses a piston top, a piston and an engine. The top of the piston can improve the cooling capacity of the inner cooling oil cavity and ensure the structural strength of the throat.
Description
Technical Field
The utility model relates to the technical field of engines, in particular to a piston top, a piston and an engine.
Background
The piston cooling is to spray oil into the piston inner cooling oil cavity through the piston cooling nozzle, and the engine oil oscillates in the piston inner cooling oil cavity to take away the heat transferred to the outside of the combustion chamber. Under the same oil supply capacity, the structure of the cold oil cavity in the piston directly influences the temperature field of the piston. At present, as shown in fig. 1, the cooling oil cavity 01 in the piston is arranged in an equal section, and the distance between the cooling area and the throat 02 is optimized and limited. The integrated analysis has several disadvantages:
1) the section and the space of the inner cooling oil cavity are single, the traditional piston inner cooling oil cavity adopts a uniform section structure, as shown in figure 2, the shape is regular and single, and the cooling area of the inner cooling oil cavity is limited under the condition of a certain section.
2) In order to ensure the cooling efficiency of the cooling oil cavity in the piston and to block the cooling heat flow of the ring groove 03, the position, namely the piston throat, with the highest temperature of the piston is required to be obtained as close as possible when the cooling oil cavity in the piston is arranged, and the closer the distance, the stronger the cooling capacity is, but the structural strength at the piston throat is reduced. Thus, the contradiction between the improvement of the cooling capacity and the guarantee of the strength of the piston is caused.
3) The oil storage capacity is insufficient, the oscillation cooling efficiency is reduced, the bottom of the inner cooling oil cavity with the equal cross section and the oil inlet and outlet are on the same horizontal plane, the accumulation speed of the cooling oil in the inner cooling oil cavity is low, and the oscillation cooling effect is reduced when the accumulated oil amount is insufficient.
SUMMERY OF THE UTILITY MODEL
The utility model provides a piston top, a piston and an engine, wherein the piston top can improve the cooling capacity of an inner cooling oil cavity and ensure the structural strength of a throat.
In order to achieve the purpose, the utility model provides the following technical scheme:
the utility model provides a piston top, includes interior cold oil chamber, closes on the throat of the combustion chamber of interior cold oil chamber and be located the first annular of surface, wherein, interior cold oil chamber is located the throat with between the first annular, just interior cold oil chamber is sine or cosine shape along the direction of its self central line, the crest of interior cold oil chamber closes on the throat sets up, the trough of interior cold oil chamber is kept away from the throat sets up.
In the piston top provided by the embodiment of the utility model, because the internal cooling oil cavity is positioned between the throat opening and the first ring groove, because the internal cooling oil cavity is in a sine or cosine shape along the direction of the central line of the internal cooling oil cavity, the wave crest of the internal cooling oil cavity is arranged close to the throat opening, the wave trough of the internal cooling oil cavity is arranged far away from the throat opening, and the internal cooling oil cavity forms a space continuous arch structure due to the sine and cosine arrangement of the space when being close to the throat opening and the first ring groove, the distance between the internal cooling oil cavity and the throat opening of the combustion chamber in the area of the wave crest can be closer, the cooling effect is better, the wave trough is far away from the throat opening, thereby the structural strength at the throat opening is ensured, the contradiction between the improvement of the cooling capacity and the guarantee of the piston strength is perfectly solved, and the internal cooling oil cavity with the sine or cosine structure can improve the effective cooling heat dissipation area and the oil storage capacity of the internal cooling oil cavity of the piston, and further improve the cooling capacity of the internal cooling oil cavity, meanwhile, the heat transfer path from the combustion chamber to the piston ring groove, particularly the first ring groove, is cut off, and the temperature of the throat and the first ring groove is reduced, so that the service life of the piston and the reliability of an engine can be prolonged by the inner cooling oil cavity in the embodiment.
Optionally, the areas of the cross sections of the internal cooling oil chamber in the direction of the center line of the internal cooling oil chamber are the same.
Optionally, the cross-sections of the internal cooling oil chamber in the direction of the center line of the internal cooling oil chamber are the same in shape.
Optionally, the section of the inner cooling oil cavity along the center line direction of the inner cooling oil cavity is elliptical, one end of the ellipse faces the throat, and the other end of the ellipse is far away from the throat.
Optionally, in the radial direction of the internal cooling oil cavity, the distance from the wave crest of the internal cooling oil cavity to the throat is smaller than the distance from the wave trough of the internal cooling oil cavity to the throat.
The utility model also provides a piston, which comprises any piston top part provided in the technical scheme.
The utility model also provides an engine which comprises the piston provided in the technical scheme.
Drawings
FIG. 1 is a schematic diagram of a prior art internal cooling gallery of a piston;
FIG. 2 is a cross-sectional view of FIG. 1 taken along a radial direction of the cooling gallery;
FIG. 3 is a schematic structural diagram of a piston head according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of an internal cooling gallery according to an embodiment of the present invention;
FIG. 5 is a cross-sectional view of the cooling gallery of FIG. 4 taken along a radial direction thereof;
fig. 6 is a schematic diagram of a temperature field of an internal cooling oil cavity according to an embodiment of the present invention.
Icon:
01-an internal cooling oil cavity; 02-laryngeal orifice; 03-a ring groove;
1-an internal cooling oil cavity; 2-laryngeal opening; 3-first ring groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 3, 4 and 5, the utility model provides a piston top, which comprises an internal cooling oil cavity 1, a throat 2 of a combustion chamber adjacent to the internal cooling oil cavity 1 and a first ring groove 3 positioned on the outer surface, wherein the internal cooling oil cavity 1 is positioned between the throat 2 and the first ring groove 3, the internal cooling oil cavity 1 is in a sine or cosine shape along the direction of the center line of the internal cooling oil cavity 1, the wave crest of the internal cooling oil cavity 1 is arranged adjacent to the throat 2, and the wave trough of the internal cooling oil cavity 1 is arranged far away from the throat 2.
In the piston top provided by the embodiment of the utility model, because the internal cooling oil cavity 1 is positioned between the throat opening 2 and the first ring groove 3, because the internal cooling oil cavity 1 is in a sine or cosine shape along the direction of the central line of the internal cooling oil cavity 1, the wave crest of the internal cooling oil cavity 1 is arranged close to the throat opening 2, the wave trough of the internal cooling oil cavity 1 is arranged far away from the throat opening 2, and the internal cooling oil cavity 1 forms a space continuous arch structure due to the sine and cosine arrangement of the space when being close to the throat opening 2 and the first ring groove 3, the distance between the internal cooling oil cavity 1 and the combustion chamber throat opening 2 in the area of the wave crest can be closer, the cooling effect is better, the wave trough is far away from the throat opening 2, thereby the structural strength at the throat opening 2 is ensured, the contradiction between the improvement of the cooling capacity and the guarantee of the piston strength is perfectly solved, and the cooling effective heat dissipation area and the oscillation capacity of the internal cooling oil cavity 1 in the sine or cosine structure can be improved, the oil storage capacity is improved, the cooling capacity of the inner cooling oil cavity 1 is further improved, meanwhile, a heat transfer path from the combustion chamber to a piston ring groove, particularly a first ring groove 3 is cut off, and the temperature of the throat 2 and the temperature of the first ring groove 3 are reduced, so that the service life of the piston and the reliability of an engine can be improved by the inner cooling oil cavity 1 in the embodiment.
In a specific embodiment, the areas of all cross sections of the internal cooling oil cavity 1 along the direction of the central line of the internal cooling oil cavity are the same, so that uniform heat dissipation is ensured, the service life of the piston is prolonged, and the reliability of an engine is improved.
In a specific embodiment, the cross sections of the inner cooling oil cavity 1 along the direction of the central line of the inner cooling oil cavity are the same in shape, so that the inner cooling oil cavity 1 can be uniformly cooled, and the temperature of the throat 2 and the first ring groove 3 can be reduced.
In a specific embodiment, as shown in fig. 3, the section of the internal cooling oil cavity 1 along the direction of the central line of the internal cooling oil cavity is oval, one end of the oval faces the throat 2, the other end of the oval is far away from the throat 2, the heat dissipation distance of the internal cooling oil cavity 1 can be increased due to the oval section of the internal cooling oil cavity 1, and the internal cooling oil cavity 1 can be effectively close to the top of the piston and the position of the throat 2 of the piston, and simultaneously, the heat dissipation area of the side surface of the internal cooling oil cavity is increased, so that the heat at the top of the piston can be transferred into the internal cooling oil cavity 1 as much as possible; in addition, the elliptical internal cooling oil chamber 1 effectively cuts off the path of heat propagation from the piston combustion chamber to the ring groove. As indicated by arrows in fig. 3, the heat transfer path of the piston combustion chamber is such that the higher the temperature of the throat 2, the more the heat flows into the first ring groove 3, and the higher the temperature of the first ring groove 3, and the elliptical shaped internal cooling gallery 1 can cut off the propagation path of the heat to the first ring groove 3 and further absorb the heat of the piston throat 2 to lower the temperatures of the piston throat 2 and the first ring groove 3. As shown in fig. 6, which is a temperature field of the internal cooling oil cavity in the embodiment of the present invention, it can be seen from fig. 6 that the internal cooling oil cavity can absorb the heat of the throat, and reduce the temperature at the throat and the first ring groove.
In a specific embodiment, along the radial direction of the inner cooling oil cavity 1, the distance between the wave crest of the inner cooling oil cavity 1 and the throat opening 2 is smaller than the distance between the wave trough of the inner cooling oil cavity 1 and the throat opening 2, so that the inner cooling oil cavity 1 can be ensured to cool the throat opening 2, the structural strength of the throat opening 2 is ensured, and the contradiction between the improvement of cooling capacity and the guarantee of piston strength is perfectly solved.
The embodiment of the utility model also provides a piston, which comprises any piston top part provided in the technical scheme.
The embodiment of the utility model also provides an engine which comprises the piston provided in the technical scheme.
It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present invention without departing from the spirit and scope of the utility model. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (7)
1. The utility model provides a piston top, its characterized in that includes interior cold oil chamber, closes on the throat of the combustion chamber of interior cold oil chamber and be located the first annular of surface, wherein, interior cold oil chamber is located the throat with between the first annular, just interior cold oil chamber is sine or cosine shape along the direction of its self central line, the crest of interior cold oil chamber closes on the throat sets up, the trough of interior cold oil chamber is kept away from the throat sets up.
2. The piston crown as set forth in claim 1 wherein said inner cooling gallery has a cross-sectional area that is the same throughout along its centerline.
3. The piston crown as set forth in claim 2 wherein said inner cooling gallery has the same shape in cross-section along its centerline.
4. The piston crown as set forth in claim 3 wherein said inner cooling gallery has an oval-shaped cross-section along its centerline, said oval-shaped cross-section having one end directed toward said throat and the other end directed away from said throat.
5. The piston crown as set forth in claim 1 wherein a distance from a peak of said gallery to said throat is less than a distance from a valley of said gallery to said throat in a radial direction of said gallery.
6. A piston, characterized in that it comprises a piston crown according to any one of claims 1 to 5.
7. An engine comprising the piston of claim 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121072667.4U CN215633381U (en) | 2021-05-19 | 2021-05-19 | Piston top, piston and engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121072667.4U CN215633381U (en) | 2021-05-19 | 2021-05-19 | Piston top, piston and engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215633381U true CN215633381U (en) | 2022-01-25 |
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ID=79938561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121072667.4U Active CN215633381U (en) | 2021-05-19 | 2021-05-19 | Piston top, piston and engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215633381U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116517718A (en) * | 2023-06-27 | 2023-08-01 | 潍柴动力股份有限公司 | Piston, engine and piston design method |
-
2021
- 2021-05-19 CN CN202121072667.4U patent/CN215633381U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116517718A (en) * | 2023-06-27 | 2023-08-01 | 潍柴动力股份有限公司 | Piston, engine and piston design method |
| CN116517718B (en) * | 2023-06-27 | 2023-10-20 | 潍柴动力股份有限公司 | Piston, engine and piston design method |
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