Microtexture combined oil ring suitable for piston

Abstract

The utility model provides a microtexture combined oil ring suitable for a piston, which belongs to the technical field of mechanical structure lubrication and comprises a first oil scraping piece, a second oil scraping piece, an axial bushing ring, a third oil scraping piece and a radial bushing ring which are stacked in sequence, a first sine groove texture and a first Reuleaux triangle concave texture are arranged on the end face of the first oil scraping piece, and a second sine groove texture and a second Reuleaux triangle concave texture are arranged on the end face of the second oil scraping piece. The first Reuleaux triangle concave texture is arranged between the adjacent wave crests of the first sine groove texture and / or between the adjacent wave troughs of the first sine groove texture. Under the condition that the effect that the first oil scraping piece scrapes lubricating oil on the wall of the air cylinder is not reduced, the effects of storing the lubricating oil, capturing abrasive dust and enhancing heat dissipation are achieved; most importantly, the lubricating oil in the first sine groove texture and the first Reuleaux triangle concave texture on the first oil scraping piece moves along with the piston, and the lubricating oil can immerse into the combined oil ring, can also leach out of the combined oil ring and is distributed on the wall of the air cylinder, so that the effect of lubricating the wall of the air cylinder is achieved, and the lubricating effect on the piston is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical structure lubrication, and particularly relates to a micro-texture combined oil ring applicable to a piston. Background Technique

[0002] When a diesel engine piston ring set is working, it is necessary to deliver a certain amount of engine oil to the friction surface and scrape off the excess engine oil when the piston moves downward. As one of the most severely worn components in an engine, the piston ring set should improve the lubrication performance and reduce wear as much as possible to ensure its normal operation throughout the life cycle of the engine. By improving lubrication and reducing friction, the micro-texture design can also reduce the vibration and noise generated by the piston pin during operation and improve the smoothness of the engine.

[0003] The micro-texture design is to optimize its performance, reduce friction, improve sealing performance and wear resistance. The micro-texture is usually achieved by manufacturing tiny groove structures on the surface of the piston ring. These structures can reduce friction. The micro-texture can reduce the area of direct metal contact, reduce the friction coefficient, and improve fuel economy; improve the distribution and retention ability of the oil film, reduce wear and extend the service life of the piston ring. The micro-texture can also help with heat dissipation and keep the piston ring within the optimal working temperature range.

[0004] The existing piston is provided with an oil ring. The main function is to scrape off the excess engine oil on the cylinder wall and apply a uniform engine oil film on the cylinder wall to prevent the engine oil from entering the cylinder for combustion and reduce the wear of the piston and the piston ring and the cylinder wall at the same time. However, the existing oil ring has less oil storage space, and the lubrication and cooling effects are significantly reduced, resulting in increased wear of the oil ring and the cylinder wall. Content of the Utility Model

[0005] Based on this, the utility model provides a micro-texture combined oil ring applicable to a piston to solve the technical problem existing in the prior art that the existing oil ring has less oil storage space, the lubrication and cooling effects are significantly reduced, resulting in increased wear of the oil ring and the cylinder wall.

[0006] The technical solution of the utility model to solve the above technical problems is as follows:

[0007] A micro-texture combined oil ring applicable to a piston includes a first oil scraping blade, a second oil scraping blade, an axial lining ring, a third oil scraping blade and a radial lining ring which are stacked in sequence. The end face of the first oil scraping blade is provided with a first sine groove texture and a first Reuleaux triangle concave texture. The first Reuleaux triangle concave texture is arranged between adjacent wave crests of the first sine groove texture and / or between adjacent wave troughs of the first sine groove texture.

[0008] Preferably, a second sinusoidal groove texture and a second Reuleaux triangle concave texture are provided on the outer circumferential side wall of the first oil scraping blade, and the second Reuleaux triangle concave texture is provided between adjacent wave crests of the second sinusoidal groove texture and / or between adjacent wave troughs of the second sinusoidal groove texture.

[0009] Preferably, a third sinusoidal groove texture and a third Reuleaux triangle concave texture are provided on the end face of the second oil scraping blade, and the third Reuleaux triangle concave texture is provided between adjacent wave crests of the third sinusoidal groove texture and / or between adjacent wave troughs of the third sinusoidal groove texture.

[0010] Preferably, a fourth sinusoidal groove texture and a fourth Reuleaux triangle concave texture are provided on the outer circumferential side wall of the second oil scraping blade, and the fourth Reuleaux triangle concave texture is provided between adjacent wave crests of the fourth sinusoidal groove texture and / or between adjacent wave troughs of the fourth sinusoidal groove texture.

[0011] Preferably, a fifth sinusoidal groove texture and a fifth Reuleaux triangle concave texture are provided on the end face of the third oil scraping blade, and the fifth Reuleaux triangle concave texture is provided between adjacent wave crests of the fifth sinusoidal groove texture and / or between adjacent wave troughs of the fifth sinusoidal groove texture.

[0012] Preferably, a sixth sinusoidal groove texture and a sixth Reuleaux triangle concave texture are provided on the outer circumferential side wall of the second oil scraping blade, and the sixth Reuleaux triangle concave texture is provided between adjacent wave crests of the sixth sinusoidal groove texture and / or between adjacent wave troughs of the sixth sinusoidal groove texture.

[0013] Preferably, a seventh sinusoidal groove texture and a seventh Reuleaux triangle concave texture are intermittently provided on the side wall of the radial backing ring, and the seventh Reuleaux triangle concave texture is provided between adjacent wave crests of the seventh sinusoidal groove texture and / or between adjacent wave troughs of the seventh sinusoidal groove texture.

[0014] Compared with the prior art, the utility model has at least the following advantages:

[0015] A first sinusoidal groove texture and a first Reuleaux triangle concave texture are provided on the end face of the first oil scraping blade. Without reducing the function of the first oil scraping blade to scrape the lubricating oil on the cylinder wall, it also has the functions of storing lubricating oil, capturing abrasive particles, and enhancing heat dissipation. Most importantly, as the piston moves, the lubricating oil in the first sinusoidal groove texture and the first Reuleaux triangle concave texture on the first oil scraping blade can soak into the combined oil ring and also soak out of the combined oil ring and be distributed on the cylinder wall, achieving the function of lubricating the cylinder wall and improving the lubrication effect on the piston. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an exploded view of the combined oil ring.

[0017] Figure 2 It is a schematic diagram of a piston and a combined oil ring.

[0018] Figure 3 It is a schematic diagram of partial assembly of an engine.

[0019] Figure 4 It is a schematic diagram of the first oil scraping blade.

[0020] Figure 5 It is Figure 4 -A partial enlarged view.

[0021] Figure 6 It is a schematic diagram of the second oil scraping blade.

[0022] Figure 7 It is Figure 6 -B partial enlarged view.

[0023] Figure 8 It is a schematic diagram of the third oil scraping blade.

[0024] Figure 9 It is Figure 7 -C partial enlarged view.

[0025] Figure 10 It is a schematic diagram of a radial lining ring.

[0026] In the figure: piston 100, oil groove 110, cylinder wall 200, combined oil ring 300, first oil scraping blade 310, first sine groove texture 311, first Reuleaux triangle concave texture 312, second sine groove texture 313, second Reuleaux triangle concave texture 314, second oil scraping blade 320, third sine groove texture 321, third Reuleaux triangle concave texture 322, fourth sine groove texture 323, fourth Reuleaux triangle concave texture 324, axial lining ring 330, third oil scraping blade 340, fifth sine groove texture 341, fifth Reuleaux triangle concave texture 342, sixth sine groove texture 343, sixth Reuleaux triangle concave texture 344, radial lining ring 350, seventh sine groove texture 351, seventh Reuleaux triangle concave texture 352. Specific embodiments

[0027] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. The following will further describe the technical solutions of the present invention in conjunction with the drawings of the embodiments of the present invention. The present invention is not limited to the following specific embodiments.

[0028] It should be understood that the same or similar reference numerals in the accompanying drawings of the embodiments correspond to the same or similar components. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right", "top", "bottom", etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the accompanying drawings are only for illustrative purposes and should not be construed as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] Please refer to Figures 1 to 3 , a micro-texture combined oil ring suitable for a piston, which is arranged in a matching manner with the piston 100 of an engine. An oil groove 110 is provided on the piston 100. The combined oil ring 300 is arranged in the oil groove 110. The combined oil ring 300 is attached to the cylinder wall 200 and is used to make an oil film adhere to the cylinder wall 200. The micro-texture combined oil ring 300 includes a first oil scraping blade 310, a second oil scraping blade 320, an axial liner 330, a third oil scraping blade 340, and a radial liner 350 that are stacked in sequence. The first oil scraping blade 310 is attached to the cylinder wall 200 and is used to scrape the lubricating oil on the cylinder wall 200. The second oil scraping blade 320 is located below the first oil scraping blade 310 and is attached to the first oil scraping blade 310 and is used to scrape the lubricating oil on the cylinder wall 200. The axial liner 330 is an axial elastic corrugated pipe. The axial liner 330 is located below the second oil scraping blade 320. The axial liner 330 and the second oil scraping blade 320 are squeezed and attached to each other. Lubricating oil can flow into the axial liner 330, which has the function of storing lubricating oil and at the same time adheres lubricating oil to the combined oil ring 300 and the cylinder wall 200. The third oil scraping blade 340 is located below the axial liner 330. The third oil scraping blade 340 is squeezed and attached to the axial liner 330 and is used to scrape the lubricating oil on the cylinder wall 200. The radial liner 350 is a radial corrugated pipe. The radial liner 350 is located below the third oil scraping blade 340. The radial liner 350 and the third oil scraping blade 340 are squeezed and attached to each other.

[0030] Refer to Figure 4 and Figure 5, on the end face of the first oil scraping blade 310, a first sinusoidal groove texture 311 and a first Reuleaux triangle concave texture 312 are provided. The first Reuleaux triangle concave texture 312 is arranged between adjacent wave crests of the first sinusoidal groove texture 311 and / or between adjacent wave troughs of the first sinusoidal groove texture 311. When the lubricating oil in the oil pan enters the cylinder liner and the piston 100 body along the lubrication system, part of the lubricating oil will splash onto the end face of the first oil scraping blade 310. Since a number of the first sinusoidal groove textures 311 are provided on the end face of the first oil scraping blade 310, the micro-texture groove body is set as a sinusoidal groove. The sinusoidal groove is a kind of curve micro-texture groove body. Compared with a straight micro-texture groove body, it can store more lubricating oil. Compared with other curve micro-texture groove bodies, the sinusoidal groove accounts for a larger surface area of the first oil scraping blade 310, stores more lubricating oil, has a strong ability to capture abrasive particles, enhances heat dissipation, and also has a strong load-bearing capacity. The first Reuleaux triangle concave texture 312 also has the functions of storing lubricating oil and capturing abrasive particles, and also has a strong load-bearing capacity. The first counterbore texture is arranged between adjacent wave crests of the first sinusoidal groove texture 311 and / or between adjacent wave troughs of the first sinusoidal groove texture 311, making the distribution of the first counterbore texture more uniform, storing more lubricating oil, and having a strong ability to capture abrasive particles.

[0031] The achieved effect is that by providing the first sinusoidal groove texture 311 and the first Reuleaux triangle concave texture 312 on the end face of the first oil scraping blade 310, without reducing the function of the first oil scraping blade 310 to scrape the lubricating oil on the cylinder wall 200, it also has the functions of storing lubricating oil, capturing abrasive particles, and enhancing heat dissipation. Most importantly, as the piston 100 moves, the lubricating oil in the first sinusoidal groove texture 311 and the first Reuleaux triangle concave texture 312 on the first oil scraping blade 310 can infiltrate into the combined oil ring 300 and also can leach out of the combined oil ring 300 and be distributed on the cylinder wall 200, achieving the effect of lubricating the cylinder wall 200 and improving the lubrication effect on the piston 100.

[0032] Specifically, the first Reuleaux triangle concave texture 312 is arranged between the adjacent wave crests of the first sine groove texture 311 and between the adjacent wave troughs of the first sine groove texture 311. The adjacent first counterbore textures are arranged in central symmetry along the center point between the wave crest and the wave trough of the first sine groove texture 311. During the reciprocating linear motion of the piston 100, the cross section of the first sine groove texture 311 is not perpendicular to the motion direction in the theoretical analysis, and there are angular differences at different positions. Arranging the first counterbore texture between the adjacent wave crests of the first sine groove texture 311 and between the adjacent wave troughs of the first sine groove texture 311 can make the distribution of the first counterbore texture more uniform, and make the anti-friction and anti-wear and dynamic pressure lubrication effects of the overall piston 100 ring group and the surface of the combined oil ring 300 more average in the circumferential distribution.

[0033] Specifically, a first oil ring cut is provided on the first oil scraping blade 310, a second oil ring cut is provided on the second oil scraping blade 320, and a third oil ring cut is provided on the third oil scraping blade 340.

[0034] In a possible embodiment, a second sine groove texture 313 and a second Reuleaux triangle concave texture 314 are provided on the outer side wall of the first oil scraping blade 310. The second Reuleaux triangle concave texture 314 is arranged between the adjacent wave crests of the second sine groove texture 313 and / or between the adjacent wave troughs of the second sine groove texture 313. Part of the lubricating oil scraped from the cylinder wall 200 will enter the second sine groove texture 313 and the second Reuleaux triangle concave texture 314, playing a role in lubricating the cylinder wall 200. The excess lubricating oil will not enter the combustion chamber. There is also an oil ring scraping the lubricating oil on the cylinder wall 200. Specifically, reference can be made to the working process of the piston 100 in the cylinder wall 200. While the second sine groove texture 313 and the second Reuleaux triangle concave texture 314 store the lubricating oil and lubricate the cylinder wall 200, the most important function is that the second sine groove texture 313 and the second Reuleaux triangle concave texture 314 are used to store and capture abrasives, avoiding the generated fine debris from scratching the outer wall of the piston 100 and the cylinder wall 200 as the piston 100 moves, and improving the service life of the piston 100 and the cylinder wall 200.

[0035] Specifically, the second Reuleaux triangle concave texture 314 is disposed between the adjacent crests of the second sine groove texture 313 and between the adjacent troughs of the second sine groove texture 313. The adjacent second counterbore textures are symmetrically arranged about the center point between the crest and the trough of the second sine groove texture 313. During the reciprocating linear motion of the piston 100, the cross-section of the second sine groove texture 313 is not perpendicular to the direction of motion in the theoretical analysis, and there are angular differences at different positions. By arranging the second counterbore texture between the adjacent crests of the second sine groove texture 313 and between the adjacent troughs of the second sine groove texture 313, the distribution of the second counterbore texture can be made more uniform, making the anti-friction, wear-resistant, and hydrodynamic lubrication effects of the overall piston 100 ring set and the surface of the combined oil ring 300 more evenly distributed in the circumferential direction.

[0036] In a possible embodiment, referring to Figures 6 to 7 , a third sine groove texture 321 and a third Reuleaux triangle concave texture 322 are provided on the end face of the second oil scraping blade 320. The third Reuleaux triangle concave texture 322 is disposed between the adjacent crests of the third sine groove texture 321 and / or between the adjacent troughs of the third sine groove texture 321. The third sine groove texture 321 and the third Reuleaux triangle concave texture 322 have the same functions and effects as the first sine groove texture 311 and the first Reuleaux triangle concave texture 312, and are used to further store lubricating oil, capture wear debris, and enhance heat dissipation; at the same time, the third sine groove texture 321 and the third Reuleaux triangle concave texture 322 are used to immerse the lubricating oil into the combined oil ring 300, and can also leach out of the combined oil ring 300 and be distributed on the cylinder wall 200 to achieve the effect of lubricating the cylinder wall 200 and improve the lubrication effect on the piston 100.

[0037] Specifically, the third Reuleaux triangle concave texture 322 is disposed between the adjacent crests of the third sine groove texture 321 and between the adjacent troughs of the third sine groove texture 321. The adjacent third counterbore textures are symmetrically arranged about the center point between the crest and the trough of the third sine groove texture 321. The effect is the same as that of the first sine groove texture 311 and the first Reuleaux triangle concave texture 312.

[0038] In a possible embodiment, a fourth sinusoidal groove texture 323 and a fourth Reuleaux triangle concave texture 324 are provided on the outer circumferential side wall of the second oil scraping blade 320. The fourth Reuleaux triangle concave texture 324 is provided between adjacent wave crests and / or between adjacent wave troughs of the fourth sinusoidal groove texture 323. The functions and effects of the fourth sinusoidal groove texture 323 and the fourth Reuleaux triangle concave texture 324 are the same as those of the second sinusoidal groove texture 313 and the second Reuleaux triangle concave texture 314. The second sinusoidal groove texture 313 and the second Reuleaux triangle concave texture 314 are used to further store lubricating oil and lubricate the cylinder wall 200, and the fourth sinusoidal groove texture 323 and the fourth Reuleaux triangle concave texture 324 are used to store and capture abrasive particles, avoiding the generated fine debris from scratching the outer wall of the piston 100 and the cylinder wall 200 as the piston 100 moves, and improving the service life of the piston 100 and the cylinder wall 200.

[0039] Specifically, the fourth Reuleaux triangle concave texture 324 is provided between adjacent wave crests and between adjacent wave troughs of the fourth sinusoidal groove texture 323. The adjacent fourth counterbore textures are symmetrically arranged about the center point between the wave crest and the wave trough of the fourth sinusoidal groove texture 323. The effect is the same as that of the second sinusoidal groove texture 313 and the second Reuleaux triangle concave texture 314.

[0040] In a possible embodiment, refer to Figures 8 to 9, a fifth sinusoidal groove texture 341 and a fifth Reuleaux triangle concave texture 342 are provided on the end face of the third oil scraping blade 340. The fifth Reuleaux triangle concave texture 342 is arranged between the adjacent wave crests of the fifth sinusoidal groove texture 341 and / or between the adjacent wave troughs of the fifth sinusoidal groove texture 341. The main functions of the fifth sinusoidal groove texture 341 and the fifth Reuleaux triangle concave texture 342 are to store lubricating oil. As the lubrication system works, part of the lubricating oil will flow from the axial liner 330 to the cylinder wall 200. And as the first oil scraping blade 310, the second oil scraping blade 320, the third oil scraping blade 340 and the gas ring on the outer wall of the piston 100 scrape off the lubricating oil, part of the lubricating oil will flow back into the combined oil ring 300 through the corrugated gap of the axial liner 330. And the third oil scraping blade 340 is located below the axial liner 330, and the lubricating oil flowing back from the corrugated gap of the axial liner 330 will fall on the third oil scraping blade 340. In the prior art, the fifth sinusoidal groove texture 341 and the fifth Reuleaux triangle concave texture 342 are not provided on the surface of the third oil scraping blade 340, and the flowing-back lubricating oil will fall back into the oil pan. However, with the fifth sinusoidal groove texture 341 and the fifth Reuleaux triangle concave texture 342 provided on the surface of the third oil scraping blade 340, part of the flowing-back lubricating oil will be temporarily stored in the fifth sinusoidal groove texture 341 and the fifth Reuleaux triangle concave texture 342, ensuring that there is continuously lubricating oil in the combined oil ring 300, achieving the effect of storing a large amount of lubricating oil and enhancing heat dissipation. When the piston 100 moves, it plays a role in continuously lubricating the cylinder wall 200.

[0041] Specifically, the fifth Reuleaux triangle concave texture 342 is arranged between the adjacent wave crests of the fifth sinusoidal groove texture 341 and between the adjacent wave troughs of the fifth sinusoidal groove texture 341. The adjacent fifth counterbore textures are arranged in central symmetry along the center point between the wave crest and the wave trough of the fifth sinusoidal groove texture 341. During the reciprocating linear motion of the piston 100, the cross-section of the fifth sinusoidal groove texture 341 is not perpendicular to the motion direction in theoretical analysis, and there are angular differences at different positions. Arranging the fifth counterbore texture between the adjacent wave crests of the fifth sinusoidal groove texture 341 and between the adjacent wave troughs of the fifth sinusoidal groove texture 341 can make the distribution of the fifth counterbore texture more uniform, making the anti-friction and anti-wear and hydrodynamic lubrication effects on the surface of the overall piston 100 ring group and the combined oil ring 300 more average in circumferential distribution.

[0042] In a possible embodiment, a sixth sine groove texture 343 and a sixth Reuleaux triangle concave texture 344 are provided on the outer peripheral side wall of the third oil scraping blade 340. The sixth Reuleaux triangle concave texture 344 is provided between adjacent wave crests of the sixth sine groove texture 343 and / or between adjacent wave troughs of the sixth sine groove texture 343. Since a relatively large amount of lubricating oil is stored on the end face of the third oil scraping blade 340, during the movement of the piston 100, the lubricating oil in the fifth sine groove texture 341 and the fifth Reuleaux triangle concave texture 342 on the end face of the third oil scraping blade 340 will leach out along the corrugated gaps of the axial lining ring 330 and enter the sixth sine groove texture 343 and the sixth Reuleaux triangle concave texture 344, and the sixth sine groove texture 343 and the sixth Reuleaux triangle concave texture 344 are in contact with the cylinder wall 200, thereby improving the lubrication effect on the cylinder wall 200.

[0043] Specifically, the sixth Reuleaux triangle concave texture 344 is provided between adjacent wave crests of the sixth sine groove texture 343 and between adjacent wave troughs of the sixth sine groove texture 343, and adjacent sixth counterbore textures are symmetrically arranged about the center point between the wave crest and the wave trough of the sixth sine groove texture 343. The effect is the same as that of the second sine groove texture 313 and the second Reuleaux triangle concave texture 314.

[0044] In a possible embodiment, referring to Figure 10 , seventh sine groove textures 351 and seventh Reuleaux triangle concave textures 352 are intermittently provided on the side wall of the radial lining ring 350. The seventh Reuleaux triangle concave textures 352 are provided between adjacent wave crests of the seventh sine groove textures 351 and / or between adjacent wave troughs of the seventh sine groove textures 351. The intermittent setting means that the seventh sine groove textures 351 and the seventh Reuleaux triangle concave textures 352 are arranged at intervals on the side wall of the radial lining ring 350 and are not continuously arranged. By intermittently providing the seventh sine groove textures 351 and the seventh Reuleaux triangle concave textures 352 on the side wall of the radial lining ring 350, not only is the load-bearing capacity of the radial lining ring 350 prevented from being weakened, which is used to support the first oil scraping blade 310, the second oil scraping blade 320, the axial lining ring 330, and the third oil scraping blade 340, but also lubricating oil can be stored in the seventh sine groove textures 351 and the seventh Reuleaux triangle concave textures 352, increasing the surface area of the side wall of the radial lining ring 350 for enhancing heat dissipation.

[0045] Specifically, the seventh Reuleaux triangle concave texture 352 is disposed between the adjacent wave crests of the seventh sinusoidal groove texture 351 and between the adjacent wave troughs of the seventh sinusoidal groove texture 351. The adjacent seventh counterbore textures are symmetrically arranged about the center point between the wave crest and the wave trough of the seventh sinusoidal groove texture 351. The effect is the same as that of the second sinusoidal groove texture 313 and the second Reuleaux triangle concave texture 314.

[0046] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A micro-texture combined oil ring applicable to a piston, characterized in that, It includes a first oil scraping blade, a second oil scraping blade, an axial lining ring, a third oil scraping blade and a radial lining ring stacked in sequence. A first sinusoidal groove texture and a first Reuleaux triangle concave texture are provided on the end face of the first oil scraping blade. The first Reuleaux triangle concave texture is arranged between adjacent wave crests of the first sinusoidal groove texture and / or between adjacent wave troughs of the first sinusoidal groove texture.

2. The micro-texture combined oil ring applicable to a piston according to claim 1, wherein A second sinusoidal groove texture and a second Reuleaux triangle concave texture are provided on the outer side wall of the first oil scraping blade. The second Reuleaux triangle concave texture is arranged between adjacent wave crests of the second sinusoidal groove texture and / or between adjacent wave troughs of the second sinusoidal groove texture.

3. The micro-texture combined oil ring applicable to a piston according to claim 1, characterized in that, A third sinusoidal groove texture and a third Reuleaux triangle concave texture are provided on the end face of the second oil scraping blade. The third Reuleaux triangle concave texture is arranged between adjacent wave crests of the third sinusoidal groove texture and / or between adjacent wave troughs of the third sinusoidal groove texture.

4. The micro-textured combined oil ring applicable to a piston according to claim 3, wherein, A fourth sinusoidal groove texture and a fourth Reuleaux triangle concave texture are provided on the outer side wall of the second oil scraping blade. The fourth Reuleaux triangle concave texture is arranged between adjacent wave crests of the fourth sinusoidal groove texture and / or between adjacent wave troughs of the fourth sinusoidal groove texture.

5. The micro-texture combined oil ring applicable to a piston according to claim 1, wherein, A fifth sinusoidal groove texture and a fifth Reuleaux triangle concave texture are provided on the end face of the third oil scraping blade. The fifth Reuleaux triangle concave texture is arranged between adjacent wave crests of the fifth sinusoidal groove texture and / or between adjacent wave troughs of the fifth sinusoidal groove texture.

6. The micro-texture combined oil ring applicable to a piston according to claim 5, wherein, A sixth sinusoidal groove texture and a sixth Reuleaux triangle concave texture are provided on the outer side wall of the second oil scraping blade. The sixth Reuleaux triangle concave texture is arranged between adjacent wave crests of the sixth sinusoidal groove texture and / or between adjacent wave troughs of the sixth sinusoidal groove texture.

7. The micro-texture combined oil ring applicable to a piston according to claim 1, wherein A seventh sinusoidal groove texture and a seventh Reuleaux triangle concave texture are intermittently provided on the side wall of the radial lining ring. The seventh Reuleaux triangle concave texture is arranged between adjacent wave crests of the seventh sinusoidal groove texture and / or between adjacent wave troughs of the seventh sinusoidal groove texture.

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