Piston ring for engine, engine and vehicle

Abstract

The invention discloses a piston ring for an engine, the engine and a vehicle, and relates to the technical field of piston rings, the piston ring for the engine comprises an annular body, the annular body is provided with a first end and a second end which are opposite in the circumferential direction of the annular body, the annular body is provided with an outer side wall, a groove is formed in the outer side wall, and the groove sinks towards the interior of the annular body; the groove extends from the first end to the second end in the circumferential direction of the annular body. According to the piston ring, the groove is formed in the outer side wall of the annular body and can store lubricating oil scraped by the piston ring and abrasive dust generated by relative movement between the piston ring and the cylinder sleeve, so that an oil film between the piston ring and the cylinder sleeve can be better kept, and the sealing and lubricating performance of the piston ring can be improved; friction loss between the piston ring and the cylinder sleeve is reduced, the risk that the piston ring and the cylinder sleeve are abraded by abrasive dust can be reduced, the service life of the piston ring is prolonged, the grooves are easy to machine, and therefore the manufacturing cost of the piston ring can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of piston rings, and in particular to a piston ring for an engine, an engine and a vehicle. Background Art

[0002] In the relevant technology, the piston ring is one of the key components in the engine. The friction loss caused by the relative movement between the piston ring and the cylinder liner accounts for about half of the entire machine, which has an important impact on all aspects of the engine's performance and service life. Therefore, it is necessary to reduce the friction loss between the piston ring and the cylinder liner. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present invention is to provide a piston ring for an engine, which can improve the sealing and lubrication performance of the piston ring, reduce the friction loss between the piston ring and the cylinder liner, reduce the wear between the piston ring and the cylinder liner caused by wear debris, extend the service life of the piston ring, and the groove is easy to process, thereby reducing the manufacturing cost of the piston ring.

[0004] The present invention further provides an engine having the piston ring for an engine.

[0005] The present invention further provides a vehicle having the above engine.

[0006] A piston ring for an engine according to an embodiment of the present invention comprises: an annular body having a first end and a second end opposite to each other along the circumference of the annular body, an outer wall formed with a groove, the groove being recessed toward the inside of the annular body, and extending from the first end to the second end along the circumference of the annular body.

[0007] The piston ring for an engine according to an embodiment of the present invention has a groove formed on the outer side wall of the ring body, which can store the lubricating oil scraped off by the piston ring and the wear debris generated by the relative movement between the piston ring and the cylinder liner, so as to better maintain the oil film between the piston ring and the cylinder liner, which is beneficial to improving the sealing and lubrication performance of the piston ring, reducing the friction loss between the piston ring and the cylinder liner, and reducing the wear between the piston ring and the cylinder liner caused by the wear debris, thereby extending the service life of the piston ring. In addition, the groove is easy to process, which can reduce the manufacturing cost of the piston ring.

[0008] According to some embodiments of the present invention, there are multiple grooves, and the multiple grooves are arranged in sequence along the thickness direction of the annular body.

[0009] According to some embodiments of the present invention, any two adjacent grooves are spaced apart.

[0010] According to some embodiments of the present invention, the spacing distance between any two adjacent grooves is the same.

[0011] According to some embodiments of the present invention, the recessed depths of the plurality of grooves toward the inside of the annular body are the same.

[0012] According to some embodiments of the present invention, the piston ring for the engine further includes: a friction ring, the number of the friction rings is less than the number of the grooves, and each groove is provided with a friction ring.

[0013] According to some embodiments of the present invention, a friction ring is provided in a groove between two grooves at the end.

[0014] According to some embodiments of the present invention, along the circumference of the friction ring, the friction ring has a third end and a fourth end relative to each other, the third end is provided with a first boss so that the annular body and the first boss jointly define a first assembly space, and the first assembly space is located on one side of the first boss, and the fourth end is provided with a second boss so that the annular body and the second boss jointly define a second assembly space, and the second assembly space is located on one side of the second boss, the first boss is assembled in the second assembly space, and the second boss is assembled in the first assembly space.

[0015] According to some embodiments of the present invention, along the extension direction of the groove, the widths of the groove at different positions are the same.

[0016] According to some embodiments of the present invention, a bottom wall of the groove is formed with a groove body that is recessed toward the inside of the annular body.

[0017] According to some embodiments of the present invention, the groove body extends from the first end to the second end along the circumference of the annular body.

[0018] The engine according to the embodiment of the present invention comprises: a piston and a piston ring, wherein the piston ring is sleeved on the piston, and the piston ring is the piston ring used for the engine in the above embodiment.

[0019] A vehicle according to an embodiment of the present invention includes the engine of the above embodiment.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 is a cross-sectional schematic diagram of a piston ring according to an embodiment of the present invention;

[0023] Figure 2 is a schematic diagram of an expanded surface of a piston ring according to an embodiment of the present invention;

[0024] Figure 3 is a cross-sectional schematic diagram of an assembled piston ring and a friction ring according to an embodiment of the present invention;

[0025] Figure 4 is a schematic diagram of assembling the first boss and the second boss of an embodiment of the present invention;

[0026] Figure 5 It is a cross-sectional view of the piston ring, the piston, and the cylinder sleeve of the engine after being assembled according to the embodiment of the present invention.

[0027] Reference numerals:

[0028] Piston ring 100;

[0029] Ring body 10; first end 11; second end 12; outer side wall 13; groove 14;

[0030] Friction ring 20; third end 21; fourth end 22; first boss 23; second boss 24; first assembly space 25; second assembly space 26;

[0031] Piston 30; Cylinder liner 31. DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] Reference below Figure 1-Figure 5 A piston ring 100 for an engine, an engine, and a vehicle according to an embodiment of the present invention are described.

[0034] According to an embodiment of the present invention, a piston ring 100 for an engine includes: an annular body 10, wherein the annular body 10 has a first end 11 and a second end 12 opposite to each other along the circumference of the annular body 10, and the annular body 10 has an outer side wall 13, wherein the outer side wall 13 is formed with a groove 14, and the groove 14 is recessed toward the inside of the annular body 10, and the groove 14 extends from the first end 11 to the second end 12 along the circumference of the annular body 10.

[0035] Among them, the annular body 10 is the main part of the piston ring 100, which is in an annular state. Along the circumference of the annular body 10, the annular body 10 has a first end 11 and a second end 12 relative to each other, so that the piston ring 100 forms an open annular body 10, which can simplify the installation process of the piston ring 100, and can easily open the piston ring 100 so that the piston ring 100 can be smoothly installed on the piston 30. The piston 30 will generate heat during work, causing the piston 30 to expand due to the heat. The opening provides a telescopic space for the piston ring 100, so that the piston ring 100 can adapt to the expansion and contraction of the piston 30, thereby maintaining a close fit between the piston ring 100 and the cylinder liner 31, thereby ensuring the normal operation of the engine.

[0036] The annular body 10 has an outer wall 13. When the piston 30 is working, the outer wall 13 of the annular body 10 is tightly matched with the cylinder liner 31. The outer wall 13 is formed with a groove 14. The groove 14 is recessed toward the inside of the annular body 10. The groove 14 extends from the first end 11 to the second end 12 along the circumference of the annular body 10, so that the groove 14 can store the lubricating oil scraped from the cylinder liner 31 by the piston ring 100 and the wear debris generated by the relative movement between the piston ring 100 and the cylinder liner 31, and the lubricating oil can form an oil film on the cylinder liner 31, which is not only beneficial to improving the sealing and lubrication performance of the piston ring 100, but also reducing the friction loss between the piston ring 100 and the cylinder liner 31. In addition, when dry friction occurs between the piston ring 100 and the cylinder liner 31, the lubricating oil stored in the groove 14 can be released in time, reducing the friction loss between the piston ring 100 and the cylinder liner 31, and can also reduce the risk of wear of the piston ring 100 and the cylinder liner 31 by abrasive chips, thereby extending the service life of the piston ring 100. Compared with the pit design on the piston ring in the prior art, the groove 14 is easier to process, thereby reducing the manufacturing cost of the piston ring 100.

[0037] According to the piston ring 100 for an engine according to an embodiment of the present invention, a groove 14 is formed on the outer side wall 13 of the ring body 10, so that the lubricating oil scraped off by the piston ring 100 and the wear debris generated by the relative movement between the piston ring 100 and the cylinder liner 31 can be stored, so that the oil film between the piston ring 100 and the cylinder liner 31 can be better maintained, which is beneficial to improving the sealing and lubrication performance of the piston ring 100, reducing the friction loss between the piston ring 100 and the cylinder liner 31, and reducing the risk of wear of the piston ring 100 and the cylinder liner 31 by the wear debris, thereby extending the service life of the piston ring 100, and the groove 14 is easy to process, thereby reducing the manufacturing cost of the piston ring 100.

[0038] According to some embodiments of the present invention, Figure 1-Figure 2 As shown, there may be a plurality of grooves 14 , and the plurality of grooves 14 are arranged in sequence along the thickness direction of the annular body 10 .

[0039] There may be multiple grooves 14, for example, the number of grooves 14 may be two, three, four, five, etc., but the present invention is not limited thereto, and there may be other numbers of grooves 14, as long as there are multiple grooves 14. The present application takes four grooves 14 as an example for explanation, and the multiple grooves 14 may be arranged in sequence along the thickness direction of the annular body 10, and the thickness direction of the annular body 10 is Figure 1 In the Z direction, when the annular body 10 is subjected to external pressure or load, the multiple grooves 14 can disperse the stress along the thickness direction of the annular body 10, reduce the structural damage caused by stress concentration, and help to improve the strength and durability of the annular body 10. In addition, the formation of multiple grooves 14 can increase the contact area between the lubricating oil and the annular body 10, help transfer the heat generated by the piston 30 when working, and can effectively reduce the temperature of the piston 30 to extend the service life of the engine.

[0040] In addition, multiple grooves 14 are arranged in sequence along the thickness direction of the annular body 10, which can effectively collect and distribute lubricating oil, not only avoiding excessive consumption of lubricating oil and combustion chamber pollution, but also ensuring that the oil film is evenly distributed on the entire cylinder liner 31, which helps to further reduce the friction between the piston 30 and the cylinder liner 31, reduce the wear between the piston 30 and the cylinder liner 31, and at the same time improve the lubrication performance of the engine and the fuel economy of the engine.

[0041] According to some embodiments of the present invention, Figure 1-Figure 2 As shown, any two adjacent grooves 14 are spaced apart, which can not only collect and distribute the lubricating oil more effectively, but also help the lubricating oil to be evenly distributed on the cylinder liner 31 to form a uniform oil film to lubricate the piston 30 and the cylinder liner 31 .

[0042] According to some embodiments of the present invention, Figure 1-Figure 2 As shown, the spacing distance between any two adjacent grooves 14 is the same, so that the multiple grooves 14 are evenly distributed, so that the contact pressure between the piston ring 100 and the cylinder liner 31 can be more uniform, thereby enhancing the sealing and lubrication effects, helping to reduce gas leakage from the cylinder, and thus improving the efficiency and performance of the engine. When the multiple grooves 14 are evenly distributed, the grooves 14 can also evenly store the lubricating oil scraped off by the piston ring 100. When the piston ring 100 and the cylinder liner 31 are dry rubbed, the lubricating oil in the grooves 14 can be evenly released, thereby providing uniform and effective lubrication, further reducing the friction and wear between the piston ring 100 and the cylinder liner 31, and further extending the service life of the engine.

[0043] According to some embodiments of the present invention, Figure 1-Figure 2As shown, the recessed depths of the multiple grooves 14 toward the annular body 10 can be the same, which can evenly distribute stress, help reduce the risk of structural failure of the annular body 10 due to stress concentration, and when the lubricating oil flows through the multiple grooves 14 with the same depth, the same volume of lubricating oil can be stored in each groove 14, so that the lubricating oil can be more evenly distributed on the piston ring 100, which helps reduce the local wear problem caused by uneven lubrication and improves the wear resistance and durability of the piston ring 100. In addition, the recessed depths of the multiple grooves 14 toward the annular body 10 are the same, which can reduce the difficulty of processing the grooves 14, and can be processed using standard tools or molds, which helps reduce the manufacturing cost of the piston ring 100 and improve the production efficiency of the piston ring 100. The uniform depth makes it easier to control the size of the grooves 14 during the processing, thereby ensuring the accuracy and consistency of the grooves 14, which is conducive to improving the manufacturing accuracy of the piston ring 100.

[0044] According to some embodiments of the present invention, Figure 3 As shown, the piston ring 100 for the engine may further include: a friction ring 20 , the number of the friction rings 20 is less than the number of the grooves 14 , and each groove 14 is provided with a friction ring 20 .

[0045] The material properties of the friction ring 20 are similar to those of a solid lubricant. A solid lubricant is a powder or film-like solid used to protect the friction surface from damage or reduce friction and wear during relative motion. For example, the solid lubricant may be graphite, boron nitride, etc. The number of friction rings 20 is less than the number of grooves 14. Each groove 14 provided with a friction ring 20 is provided with a friction ring 20. The friction rings 20 may be concentrated in a specific groove 14, thereby ensuring that sufficient lubrication is provided in the key friction area. As an example of the present application, the number of grooves 14 may be four, and the number of friction rings 20 may be two. The friction rings 20 are provided in the two grooves 14 in the middle. Such a configuration helps to reduce the direct contact area between the piston ring 100 and the cylinder liner 31, reduce the friction coefficient, and thus reduce wear. By providing the friction ring 20 in the groove 14, the lubrication performance between the piston ring 100 and the cylinder liner 31 can be further improved, the friction and wear between the piston ring 100 and the cylinder liner 31 can be reduced, and the service life of the piston ring 100 can be significantly extended.

[0046] According to some embodiments of the present invention, Figure 3As shown, the groove 14 located between the two grooves 14 at the end is provided with a friction ring 20, which can not only further improve the lubrication performance between the piston ring 100 and the cylinder liner 31 and reduce the friction and wear between the piston ring 100 and the cylinder liner 31, but also enable the two grooves 14 at the end to be used to store the lubricating oil scraped off by the piston ring 100 and the wear debris generated by the relative movement between the piston ring 100 and the cylinder liner 31. Through the joint action of the friction ring 20 and the groove 14, the sealing performance of the piston ring 100 can be further improved, the friction loss between the piston ring 100 and the cylinder liner 31 can be reduced, and the service life of the piston ring 100 can be extended.

[0047] According to some embodiments of the present invention, Figure 3-Figure 4 As shown, along the circumference of the friction ring 20, the friction ring 20 has a third end 21 and a fourth end 22 relative to each other, the third end 21 is provided with a first boss 23 so that the annular body 10 and the first boss 23 jointly define a first assembly space 25, and the first assembly space 25 is located on one side of the first boss 23, and the fourth end 22 is provided with a second boss 24 so that the annular body 10 and the second boss 24 jointly define a second assembly space 26, and the second assembly space 26 is located on one side of the second boss 24, the first boss 23 is assembled in the second assembly space 26, and the second boss 24 is assembled in the first assembly space 25.

[0048] The third end 21 is provided with a first boss 23 so that the annular body 10 and the first boss 23 jointly define a first assembly space 25, and the first assembly space 25 is located on one side of the first boss 23. The fourth end 22 is provided with a second boss 24 so that the annular body 10 and the second boss 24 jointly define a second assembly space 26, and the second assembly space 26 is located on one side of the second boss 24. Figure 4 Taking the placement direction of the middle friction ring 20 as an example, the first assembly space 25 is located at the lower side of the first boss 23, and the second assembly space 26 is located at the upper side of the second boss 24. The first boss 23 and the second boss 24 are connected in an overlapping manner. The first boss 23 is assembled in the second assembly space 26, and the second boss 24 is assembled in the first assembly space 25, so that the first boss 23 and the second boss 24 partially block the gap between the first end 11 and the second end 12 of the piston ring 100, which can reduce the amount of blowby in the gap between the first end 11 and the second end 12 of the piston ring 100 without affecting the elastic force of the piston ring 100, thereby further improving the sealing performance of the engine.

[0049] According to some embodiments of the present invention, along the extension direction of the groove 14, the width of the groove 14 at different positions can be the same, which can evenly distribute stress, help reduce the risk of structural failure of the ring body 10 due to stress concentration, and enable the lubricating oil to be more evenly distributed in the circumferential direction of the groove 14, which helps reduce the local wear problem caused by uneven lubrication and improves the wear resistance and durability of the piston ring 100. It can also reduce the difficulty of processing the groove 14, and the groove 14 can be processed using a standard tool or mold, which helps to reduce the manufacturing cost of the piston ring 100 and improve the production efficiency of the piston ring 100. The uniform width makes it easier to control the size of the groove 14 during the processing process, thereby ensuring the accuracy and consistency of the groove 14, which is conducive to improving the manufacturing accuracy of the piston ring 100.

[0050] According to some embodiments of the present invention, the bottom wall of the groove 14 can be formed with a groove body that is recessed toward the annular body 10, so that the groove 14 can store more lubricating oil. When the piston ring 100 and the cylinder liner 31 are in dry friction, enough lubricating oil can be released from the groove 14, thereby providing sufficient lubrication, further reducing the friction and wear between the piston ring 100 and the cylinder liner 31, and further extending the service life of the engine.

[0051] According to some embodiments of the present invention, the groove body extends from the first end 11 to the second end 12 along the circumference of the annular body 10, so that the piston ring 100 can evenly store more lubricating oil in the circumferential direction. When the piston ring 100 and the cylinder liner 31 are in dry friction, enough lubricating oil can be evenly released in the groove 14, thereby providing uniform lubrication, significantly reducing the friction and wear between the piston ring 100 and the cylinder liner 31, and significantly extending the service life of the engine.

[0052] The engine according to the embodiment of the present invention comprises: a piston 30 and a piston ring 100, wherein the piston ring 100 is sleeved on the piston 30, and the piston ring 100 is the piston ring 100 for the engine of the above embodiment, such as Figure 5 As shown, the piston ring 100 is used to be installed in the ring groove of the piston 30, which can effectively seal the gap between the cylinder liner 31 and the piston 30, and the piston ring 100 can also scrape off the excess lubricating oil on the cylinder wall to form an oil film, which can not only prevent the engine oil from entering the combustion chamber, but also play a role in lubrication and wear reduction, thereby effectively extending the service life of the engine.

[0053] The vehicle according to the embodiment of the present invention, including the engine of the above embodiment, can improve the performance of the vehicle and reduce the manufacturing cost of the vehicle.

[0054] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0055] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A piston ring for an engine, characterized in that: include: An annular body, wherein the annular body has a first end and a second end opposite to each other along the circumference of the annular body, the annular body has an outer side wall, the outer side wall is formed with a groove, the groove is recessed toward the inside of the annular body, and the groove extends from the first end to the second end along the circumference of the annular body.

2. The piston ring for an engine according to claim 1, characterized in that: There are multiple grooves, and the multiple grooves are arranged in sequence along the thickness direction of the annular body.

3. The piston ring for an engine according to claim 2, characterized in that: Any two adjacent grooves are spaced apart.

4. The piston ring for an engine according to claim 3, characterized in that: The spacing distance between any two adjacent grooves is the same.

5. The piston ring for an engine according to claim 3, characterized in that: The recessed depths of the plurality of grooves toward the inside of the annular body are the same.

6. The piston ring for an engine according to claim 2, characterized in that: Also includes: The friction rings are provided in a quantity less than the quantity of the grooves, and each groove is provided with one friction ring.

7. The piston ring for an engine according to claim 6, characterized in that: The groove between the two grooves at the end is provided with the friction ring.

8. The piston ring for an engine according to claim 6, characterized in that: Along the circumference of the friction ring, the friction ring has a third end and a fourth end opposite to each other, the third end is provided with a first boss so that the annular body and the first boss jointly define a first assembly space, and the first assembly space is located on one side of the first boss, and the fourth end is provided with a second boss so that the annular body and the second boss jointly define a second assembly space, and the second assembly space is located on one side of the second boss, the first boss is assembled in the second assembly space, and the second boss is assembled in the first assembly space.

9. The piston ring for an engine according to any one of claims 1 to 8, characterized in that: Along the extending direction of the groove, the widths of the groove at different positions are the same.

10. The piston ring for an engine according to any one of claims 1 to 8, characterized in that: The bottom wall of the groove is formed with a groove body which is recessed toward the annular body.

11. The piston ring for an engine according to claim 10, characterized in that: The groove body extends from the first end to the second end along the circumference of the annular body.

12. An engine, characterized in that: include: A piston and a piston ring, wherein the piston ring is sleeved on the piston, and the piston ring is a piston ring for an engine according to any one of claims 1-11.

13. A vehicle, characterized in that: Comprising an engine according to claim 12.

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