CN210564791U - Piston ring bank structure of internal combustion engine - Google Patents
Piston ring bank structure of internal combustion engine Download PDFInfo
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- CN210564791U CN210564791U CN201921449253.1U CN201921449253U CN210564791U CN 210564791 U CN210564791 U CN 210564791U CN 201921449253 U CN201921449253 U CN 201921449253U CN 210564791 U CN210564791 U CN 210564791U
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Abstract
The utility model discloses an internal combustion engine piston ring bank structure, which comprises a piston, wherein the excircle upper part of the piston is a piston ring slot part, the lower part of the piston ring slot part is a piston skirt part, and the piston ring slot part is also provided with a piston ring bank which comprises a first tank bottom chamfer, a second tank bottom chamfer, a first excircle chamfer, a second excircle chamfer, a diameter of the upper part, a diameter of the lower part, a diameter of the bottom part, a first side angle, a second side angle, a first ring bank height and a second ring bank height; the utility model has the advantages that: on the premise of not increasing other parts, the sealing performance of the sealing structure of the piston, the piston ring and the cylinder sleeve is improved, the air leakage is reduced, the oil consumption is reduced, the structure is simple, the cost is low, and the reliability is high; the cooling fins are welded at the notches of the outer rings of the piston ring groove part and the piston skirt part and form a piston cooling cavity with the piston head, and the cooling fins are steel sheets, so that the cooling effect of the piston cooling cavity is further improved.
Description
Technical Field
The utility model belongs to the technical field of the piston, concretely relates to internal-combustion engine piston ring bank structure.
Background
Along with the upgrading implementation of environmental regulations, the requirements on the performance of the internal combustion engine are higher and higher, the engine is required to be more environment-friendly, more economical and longer in service life, the higher requirements are also put forward on the piston of the internal combustion engine, and the internal combustion engine is required to have smaller oil consumption and smaller air leakage amount so as to achieve the higher performance and longer service life of the piston of the internal combustion engine.
The piston, the piston ring (the 1 st piston ring, the 2 nd piston ring … …, the 5 th piston ring) and the cylinder sleeve form a sealing structure in the internal combustion engine. The top surface of the piston is generally provided with a bowl-shaped combustion chamber, and the bowl-shaped combustion chamber is matched with related parts to form a better combustion effect, so that the engine is more environment-friendly and energy-saving; the upper part of the outer circle of the piston is a piston ring groove part, and after the piston ring groove part is arranged in the piston ring, the piston ring and the cylinder sleeve form a sealing structure; the lower part of the excircle of the piston is a piston skirt part which bears the lateral force transmitted by a piston pin hole, and the piston skirt part is matched with the cylinder sleeve to play a role in guiding; in order to achieve better sealing and oil scraping effects, a plurality of piston rings are generally arranged, the 1 st piston ring at the top mainly plays a role in sealing, the piston ring at the bottom mainly plays a role in oil scraping, and the piston ring at the middle plays a role in sealing and oil scraping; the piston ring groove part and the piston ring form better matching, so that better sealing and oil scraping effects can be achieved, and the engine has smaller air leakage and smaller engine oil consumption; in order to enable the piston and the piston ring to form good matching, the ring land structure adopted at the ring land part of the piston at present is a step type ring land structure shown in the attached figure 2 of the specification, the step diameter A5 of the step type structure is limited by the side surface of the piston ring and cannot be too small, and the step height H5 is limited by the height of the ring land and cannot be too high, so that the step volume of the step type ring land structure cannot meet the design requirement and cannot meet the requirements of oil storage and the balance of gas pressure between the upper piston ring and the lower piston ring.
The gas pressure between the upper piston ring and the lower piston ring is well balanced, the pressure in the volume between the piston rings is prevented from rising too much, the piston rings are prevented from floating, the sealing performance is improved, and the air leakage is reduced; the oil consumption is reduced better, the friction work loss is reduced, and the piston ring are prevented from being damaged by pulling, so that the piston ring land structure of the internal combustion engine is provided.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an internal-combustion engine piston ring bank structure to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an internal-combustion engine piston ring bank structure, includes the piston, the excircle upper portion of piston is the piston ring slot portion, and the lower part of this piston ring slot portion is skirt portion, still be provided with the piston ring bank on the piston ring slot portion, this piston ring bank includes tank bottom chamfer one, tank bottom chamfer two, excircle chamfer one, excircle chamfer two, upper portion diameter, lower part diameter, bottom diameter, side angle one, side angle two, ring bank height one and ring bank height two.
Preferably, the first ring land height is more than 0.5mm, and the second ring land height is more than 0.2 mm.
Preferably, the diameter of the deepest bottom is more than or equal to 90 percent of the diameter of the piston.
Preferably, the inclination of the first side angle and the second side angle is 0-60 °.
Preferably, the piston ring groove part and the outer ring gap of the piston skirt part are welded with cooling fins, and form a piston cooling cavity together with the piston head.
Preferably, the piston skirt is further provided with a piston pin hole.
Preferably, the top surface of the piston is a bowl-shaped combustion chamber.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) on the premise of not increasing other parts, the sealing performance of the sealing structure of the piston, the piston ring and the cylinder sleeve is improved, the air leakage is reduced, the oil consumption is reduced, the structure is simple, the cost is low, and the reliability is high;
(2) the cooling fins are welded at the notches of the outer rings of the piston ring groove part and the piston skirt part and form a piston cooling cavity with the piston head, and the cooling fins are steel sheets, so that the cooling effect of the piston cooling cavity is further improved.
Drawings
FIG. 1 is a schematic diagram of a conventional structure;
FIG. 2 is an enlarged schematic view of the piston ring land of FIG. 1;
fig. 3 is a schematic structural diagram of a first embodiment of the present invention;
fig. 4 is an enlarged schematic structural diagram of a region I in fig. 3 according to the present invention;
fig. 5 is a schematic structural diagram of a second embodiment of the present invention;
fig. 6 is an enlarged schematic view of the area ii in fig. 5 according to the present invention;
fig. 7 is a schematic structural diagram of a third embodiment of the present invention;
fig. 8 is an enlarged schematic view of the region iii of fig. 7 according to the present invention;
in the figure: 1. a piston; 2. a piston cooling cavity; 3. a piston ring groove portion; 4. a piston ring land; 5. a piston skirt; 6. a piston pin bore; 7. a 3 rd piston ring; 8. a 2 nd piston ring; 9. 1 st piston ring; 10. a cylinder liner; 11. chamfering the bottom of the groove; 12. chamfering the bottom of the groove II; 13. chamfering the outer circle I; 14. chamfering the outer circle II; 15. upper diameter; 16. lower diameter; 17. bottom diameter; 18. a first side surface angle; 19. a side angle II; 20. the ring land height is one; 21. the ring bank height is two; 22. and (4) cooling fins.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Comparative example
Referring to fig. 1 and 2, the prior art scheme: a kind of internal-combustion engine piston ring bank structure, including the piston 1, the top surface of the piston 1 is the combustion chamber of the bowl shape, the combustion effect of the combustion chamber of the bowl shape is better, make the engine more environment-friendly, more energy-conserving, the excircle upper portion of the piston 1 is the piston ring slot 3, the piston ring slot 3 is equipped with the 3 rd piston ring 7, 2 nd piston ring 8 and 1 st piston ring 9 that is correspondent, also include the cylinder liner 10 that is set in the piston 1 outside, after the piston ring slot 3 is packed into the piston ring, the piston 1, piston ring, 10 three of the cylinder liner form the hermetically-sealed construction, the 1 st piston ring 9 mainly plays the sealing function, the 2 nd piston ring 8 plays the sealing, oil scraping effects, the 3 rd piston ring 7 mainly plays the oil scraping effect, the piston ring slot 3 forms better cooperation with the piston ring and can play sealing, oil scraping effects better, make the air; the lower part of the piston ring groove part 3 is a piston skirt part 5, the piston ring groove part 3 is also provided with a piston ring land 4, the piston ring land 4 is of a step type ring land structure, the step diameter A5 of the step type structure is limited by the radial width of a piston ring and cannot be too small, and the step height H5 is limited by the height of the ring land and cannot be too high, so that the step volume of the step type ring land structure cannot meet the design requirement and cannot meet the requirements of oil storage and the balance of gas pressure between an upper piston ring and a lower piston ring; piston pin holes 6 are further formed in the piston skirt portion 5, the piston skirt portion 5 bears lateral force transmitted by the piston pin holes 6, and the piston skirt portion 5 is matched with the cylinder sleeve 10 to play a guiding role.
Example one
Referring to fig. 3 and 4, the present invention provides a technical solution: a piston ring land structure of an internal combustion engine comprises a piston 1, wherein the upper part of the excircle of the piston 1 is a piston ring groove part 3, the lower part of the piston ring groove part 3 is a piston skirt part 5, the piston skirt part 5 bears the lateral force transmitted by a piston pin hole 6, a piston ring land 4 is further arranged on the piston ring groove part 3, and the piston ring land 4 comprises a groove bottom chamfer I11, a groove bottom chamfer II 12, an excircle chamfer I13, an excircle chamfer II 14, an upper part diameter 15, a lower part diameter 16, a bottom diameter 17, a side surface angle I18, a side surface angle II 19, a ring land height I20 and a ring land height II 21, wherein the lower part diameter 16 can be consistent with the upper part diameter 15 or designed to be inconsistent according to the volume requirements of a piston; the first groove bottom chamfer 11, the second groove bottom chamfer 12, the first excircle chamfer 13 and the second excircle chamfer 14 can select proper fillet radius, bevel angle height and angle according to the processing difficulty, the groove volume requirement and the stress magnitude.
In this embodiment, preferably, the first land height 20 and the second land height 21 can be designed to have reasonable heights according to requirements, and the first land height 20 is greater than 0.5mm, and the second land height 21 is greater than 0.2 mm.
In the present embodiment, it is preferable that the deepest bottom diameter 17 is designed according to the requirement of the groove volume, and the deepest bottom diameter 17 is more than or equal to 90% of the diameter of the piston 1.
In this embodiment, the first side angle 18 and the second side angle 19 are preferably both inclined at 30 °.
In this embodiment, preferably, the cooling fins 22 are welded to the piston ring groove portion 3 and the outer ring notch of the piston skirt portion 5, and form the piston cooling cavity 2 with the piston head, and the cooling fins 22 are steel sheets, so as to further increase the cooling effect of the piston cooling cavity 2.
In this embodiment, preferably, the piston skirt 5 further has a piston pin hole 6.
In this embodiment, preferably, the top surface of the piston 1 is a bowl-shaped combustion chamber, which has better combustion effect, so that the engine is more environment-friendly and energy-saving.
The piston ring sealing structure can form a larger volume according to requirements, balance the gas pressure between the upper piston ring and the lower piston ring, avoid the pressure in the volume between the piston rings from rising too much, avoid the piston rings from floating, improve the sealing property and reduce the air leakage; secondly, the lubricating oil scraped by the piston ring above the ring bank can be stored by the larger groove volume, and the lubricating oil is uniformly distributed on the surface of the cylinder sleeve 10 through the piston ring below the ring bank when the piston 1 moves upwards, so that the oil consumption is reduced, the friction work loss is reduced, and the piston 1 and the piston ring are prevented from being scratched.
Can be applied between the 1 st piston ring 9 and the 2 nd piston ring 8, and can also be applied between the 2 nd piston ring 8 and the 3 rd piston ring 7; when the ring land is high enough, one ring land can adopt two or more groove structures to achieve better effect.
Example two
Referring to fig. 5 and 6, the present invention provides a technical solution: a piston ring land structure of an internal combustion engine comprises a piston 1, wherein the upper part of the excircle of the piston 1 is a piston ring groove part 3, the lower part of the piston ring groove part 3 is a piston skirt part 5, the piston skirt part 5 bears the lateral force transmitted by a piston pin hole 6, a piston ring land 4 is further arranged on the piston ring groove part 3, and the piston ring land 4 comprises a groove bottom chamfer 11, an upper part diameter 15, a lower part diameter 16, a bottom diameter 17, a side angle II 19, a ring land height I20 and a ring land height II 21; the first groove bottom chamfer angle 11, the bottom diameter 17, the first ring land height 20 and the second ring land height 21 can be adjusted according to the processing difficulty and the groove volume requirement.
In this embodiment, preferably, the first land height 20 and the second land height 21 can be designed to have reasonable heights according to requirements, and the first land height 20 is greater than 0.5mm, and the second land height 21 is greater than 0.2 mm.
In the present embodiment, it is preferable that the deepest bottom diameter 17 is designed according to the requirement of the groove volume, and the deepest bottom diameter 17 is more than or equal to 90% of the diameter of the piston 1.
In the embodiment, preferably, the lower diameter 16 is designed according to the requirement of the volume of the groove, and the ratio of the lower diameter 16 to the diameter of the piston 1 is 95-99.8%
In this embodiment, the inclination angles of the second side angle 19 are all preferably 40 °.
In this embodiment, preferably, the piston skirt 5 further has a piston pin hole 6.
In this embodiment, preferably, the top surface of the piston 1 is a bowl-shaped combustion chamber, which has better combustion effect, so that the engine is more environment-friendly and energy-saving.
The piston ring sealing structure can form a larger volume according to requirements, balance the gas pressure between the upper piston ring and the lower piston ring, avoid the pressure in the volume between the piston rings from rising too much, avoid the piston rings from floating, improve the sealing property and reduce the air leakage; secondly, the lubricating oil scraped by the piston ring above the ring bank can be stored by the larger groove volume, and the lubricating oil is uniformly distributed on the surface of the cylinder sleeve 10 through the piston ring below the ring bank when the piston 1 moves upwards, so that the oil consumption is reduced, the friction work loss is reduced, and the piston 1 and the piston ring are prevented from being scratched.
Can be applied between the 1 st piston ring 9 and the 2 nd piston ring 8, and can also be applied between the 2 nd piston ring 8 and the 3 rd piston ring 7; when the ring land is high enough, one ring land can adopt two or more groove structures to achieve better effect.
The piston ring groove part 3 is provided with a piston ring bank 4, the diameter 16 of the lower part and the diameter 15 of the upper part of the piston ring bank 4, the height I20 of the ring bank and the height II 21 of the ring bank, the diameter 17 of the bottom of the groove and the angle II 19 of the side surface of the groove form a larger volume, and the volume of the groove is multiple times of the volume of a step type ring bank structure, so that the gas pressure between an upper piston ring and a lower piston ring can be well balanced, the pressure in the volume between the piston rings is prevented from being increased too much, the piston rings are prevented from floating, the sealing performance is improved, and the; secondly, the lubricating oil scraped by the piston ring above the ring bank can be stored by the larger groove volume, and the lubricating oil is uniformly distributed on the surface of the cylinder sleeve 10 through the piston ring below the ring bank when the piston 1 moves upwards, so that the oil consumption is reduced, the friction work loss is reduced, and the piston 1 and the piston ring are prevented from being scratched.
EXAMPLE III
Referring to fig. 7 and 8, the present invention provides a technical solution: a piston ring land structure of an internal combustion engine comprises a piston 1, wherein the upper part of the excircle of the piston 1 is a piston ring groove part 3, the lower part of the piston ring groove part 3 is a piston skirt part 5, the piston skirt part 5 bears the lateral force transmitted by a piston pin hole 6, a piston ring land 4 is further arranged on the piston ring groove part 3, and the piston ring land 4 comprises a groove bottom chamfer 11, an upper part diameter 15, a lower part diameter 16, a bottom diameter 17, a side angle II 19, a ring land height I20 and a ring land height II 21; the first groove bottom chamfer angle 11, the bottom diameter 17, the first ring land height 20 and the second ring land height 21 can be adjusted according to the processing difficulty and the groove volume requirement.
In this embodiment, preferably, the first land height 20 and the second land height 21 can be designed to have reasonable heights according to requirements, and the first land height 20 is greater than 0.5mm and the second land height 21 is greater than 0.2 mm.
In the present embodiment, it is preferable that the deepest bottom diameter 17 is designed according to the requirement of the groove volume, and the deepest bottom diameter 17 is more than or equal to 90% of the diameter of the piston 1.
In the present embodiment, it is preferable that the lower diameter 16 is designed according to the requirement of the volume of the groove, and the ratio of the lower diameter 16 to the diameter of the piston 1 is 99.8% -100%.
In this embodiment, the inclination angles of the second side angle 19 are preferably 35 °.
In this embodiment, preferably, the piston skirt 5 further has a piston pin hole 6.
In this embodiment, preferably, the top surface of the piston 1 is a bowl-shaped combustion chamber, which has better combustion effect, so that the engine is more environment-friendly and energy-saving.
The piston ring sealing structure can form a larger volume according to requirements, balance the gas pressure between the upper piston ring and the lower piston ring, avoid the pressure in the volume between the piston rings from rising too much, avoid the piston rings from floating, improve the sealing property and reduce the air leakage; secondly, the lubricating oil scraped by the piston ring above the ring bank can be stored by the larger groove volume, and the lubricating oil is uniformly distributed on the surface of the cylinder sleeve 10 through the piston ring below the ring bank when the piston 1 moves upwards, so that the oil consumption is reduced, the friction work loss is reduced, and the piston 1 and the piston ring are prevented from being scratched.
Can be applied between the 1 st piston ring 9 and the 2 nd piston ring 8, and can also be applied between the 2 nd piston ring 8 and the 3 rd piston ring 7; when the ring land is high enough, one ring land can adopt two or more groove structures to achieve better effect.
The piston ring groove part 3 is provided with a piston ring bank 4, the diameter 16 of the lower part and the diameter 15 of the upper part of the piston ring bank 4, the height I20 of the ring bank and the height II 21 of the ring bank, the diameter 17 of the bottom of the groove and the angle II 19 of the side surface of the groove form a larger volume, and the volume of the groove is multiple times of the volume of a step type ring bank structure, so that the gas pressure between an upper piston ring and a lower piston ring can be well balanced, the pressure in the volume between the piston rings is prevented from being increased too much, the piston rings are prevented from floating, the sealing performance is improved, and the; secondly, the larger groove volume can store lubricating oil scraped by piston rings above the ring land, and the lubricating oil is uniformly distributed on the surface of the cylinder sleeve 10 through the piston rings below the ring land when the piston 1 moves upwards, so that the oil consumption is reduced, the friction work loss is reduced, and the piston 1 and the piston rings are prevented from being scratched
The utility model discloses a theory of operation and use flow: the cooling fins 22 are welded at the outer ring notches of the piston ring groove part 3 and the piston skirt part 5, and form a piston cooling cavity 2 with the piston head, and the cooling fins 22 are steel sheets, so that the cooling effect of the piston cooling cavity 2 is further improved;
the piston ring groove part 3 is provided with a piston ring bank 4, the diameter 16 of the lower part and the diameter 15 of the upper part of the piston ring bank 4, the height I20 of the ring bank and the height II 21 of the ring bank, the diameter 17 of the bottom of the groove, the angle I18 of the two side surfaces of the groove and the angle II 19 of the two side surfaces of the groove form a larger volume, the volume of the groove is multiple times of the volume of a step type ring bank structure, the gas pressure between the upper piston ring and the lower piston ring can be well balanced, the pressure in the volume between the piston rings is prevented from being increased too much, the piston rings are prevented from floating; secondly, the lubricating oil scraped by the piston ring above the ring bank can be stored by the larger groove volume, and the lubricating oil is uniformly distributed on the surface of the cylinder sleeve 10 through the piston ring below the ring bank when the piston 1 moves upwards, so that the oil consumption is reduced, the friction work loss is reduced, and the piston 1 and the piston ring are prevented from being scratched.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. An internal combustion engine piston ring land structure, includes piston (1), the excircle upper portion of piston (1) is piston ring groove portion (3), and the lower part of this piston ring groove portion (3) is skirt portion (5), its characterized in that: the piston ring groove is characterized in that a piston ring land (4) is further arranged on the piston ring groove (3), and the piston ring land (4) comprises a groove bottom chamfer I (11), a groove bottom chamfer II (12), an outer circle chamfer I (13), an outer circle chamfer II (14), an upper portion diameter (15), a lower portion diameter (16), a bottom portion diameter (17), a side face angle I (18), a side face angle II (19), a ring land height I (20) and a ring land height II (21).
2. An internal combustion engine piston land structure as set forth in claim 1 wherein: the height of the ring land is more than 0.5mm (20), and the height of the ring land is more than 0.2mm (21).
3. An internal combustion engine piston land structure as set forth in claim 1 wherein: the diameter (17) of the deepest bottom is more than or equal to 90 percent of the diameter of the piston (1).
4. An internal combustion engine piston land structure as set forth in claim 1 wherein: the inclination of the first side angle (18) and the second side angle (19) is 0-60 degrees.
5. An internal combustion engine piston land structure as set forth in claim 1 wherein: and cooling fins (22) are welded at the outer ring notches of the piston ring groove part (3) and the piston skirt part (5), and form a piston cooling cavity (2) with the piston head.
6. An internal combustion engine piston land structure as set forth in claim 1 wherein: and the piston skirt part (5) is also provided with a piston pin hole (6).
7. An internal combustion engine piston land structure as set forth in claim 1 wherein: the top surface of the piston (1) is a bowl-shaped combustion chamber.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921449253.1U CN210564791U (en) | 2019-09-03 | 2019-09-03 | Piston ring bank structure of internal combustion engine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921449253.1U CN210564791U (en) | 2019-09-03 | 2019-09-03 | Piston ring bank structure of internal combustion engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113944562A (en) * | 2020-07-17 | 2022-01-18 | 马勒国际有限公司 | Piston for an internal combustion engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113944562A (en) * | 2020-07-17 | 2022-01-18 | 马勒国际有限公司 | Piston for an internal combustion engine |
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