A piston ring and a piston
By designing a first conical surface and a grinding surface on the outer side of the piston ring, and forming an angle between the lower side and the bottom wall, the problem of unbalancing oil consumption and wear of the top ring is solved, achieving low wear and low oil consumption of the piston ring, and meeting the needs of high burst pressure.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- MALE ENGINE PARTS (YINGKOU) CO LTD
- Filing Date
- 2025-09-25
- Publication Date
- 2026-07-14
AI Technical Summary
In the existing technology, it is difficult to balance the oil consumption and wear of the top ring. Although the conical surface design can control the amount of blow-by and reduce frictional power consumption, it increases the contact pressure between the lower side and the bottom wall of the ring groove, resulting in greater wear.
The outer side of the piston ring is designed to include a first conical surface and a grinding surface. The lower side forms an angle of 10′ to 10° with the bottom wall. The first conical surface is twisted under high pressure to reduce the contact pressure between the lower side and the bottom wall of the ring groove, thereby reducing wear and oil consumption.
It effectively reduces wear between the piston rings and the ring grooves and oil consumption, ensures that blow-by volume is within a reasonable range, and achieves long-term stability.
Smart Images
Figure CN224496580U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of engine component technology, and in particular to a piston ring and a piston. Background Technology
[0002] High burst pressure and high power will be among the main characteristics of next-generation engine technology upgrades, while high burst pressure and power place more stringent demands on engine performance. As one of the core components of an engine, the piston ring will face challenges in terms of increased blow-by volume and oil consumption performance.
[0003] Currently, the typical design of the outer surface of the piston ring is a barrel-shaped design. The height of the barrel-shaped surface affects the contact pressure and oil consumption. A high barrel-shaped surface is beneficial for the wear of the lower side but detrimental to oil consumption, while a low barrel-shaped surface is harmful to the wear of the lower side but beneficial to oil consumption. A barrel-shaped surface with a high height makes it difficult to balance the wear of the lower side and oil consumption. Studies have shown that a tapered outer surface design can effectively control blow-by and reduce oil consumption. Furthermore, research on the impact of tapered and non-tapered rings on frictional power consumption shows that tapered rings can reduce frictional power consumption. However, the pressure between the tapered ring and the lower side of the ring groove increases significantly, which in turn increases the contact pressure between the lower side of the entire piston ring and the bottom wall of the ring groove. Therefore, this ultimately leads to greater wear on the piston ring, cylinder liner, and ring groove. Utility Model Content
[0004] Therefore, it is necessary to provide a piston ring that addresses the above-mentioned problems and solves the difficulty in balancing oil consumption and wear of the top ring in the prior art.
[0005] On one hand, this application provides a piston ring disposed within a ring groove, the ring groove including a bottom wall.
[0006] The piston ring includes:
[0007] The outer surface includes a first conical surface located above and a grinding surface located below; and
[0008] The lower side surface forms a first angle with the plane containing the bottom wall, and the opening of the first angle faces outward; wherein the angle range of the first angle is 10′~10°.
[0009] Optionally, the plane containing the bottom wall is a horizontal plane, and the lower side surface is an inclined surface; or
[0010] The plane containing the bottom wall is an inclined plane, and the lower side surface is a horizontal plane; or
[0011] Both the plane containing the bottom wall and the lower side surface are inclined surfaces.
[0012] Optionally, the first conical surface forms a second angle with the vertical direction, and the angle of the second angle ranges from 30′ to 10°.
[0013] Optionally, the grinding surface is a second conical surface, and the inclination direction of the second conical surface is consistent with the inclination direction of the first conical surface;
[0014] The second conical surface forms a third angle with the vertical direction, and the third angle is greater than 10' and less than the second angle.
[0015] Optionally, the inclination direction of the second conical surface is opposite to the inclination direction of the first conical surface;
[0016] The second conical surface forms a third angle with the vertical direction, and the third angle is less than -10′ and greater than the negative number of the second angle.
[0017] Optionally, the junction between the second conical surface and the first conical surface has a first arc-shaped transition surface.
[0018] Optionally, the grinding surface is a vertical plane or an arc-shaped surface;
[0019] The intersection of the vertical plane and the first conical surface has a second circular arc transition surface.
[0020] Optionally, the piston ring further includes an upper side and an inner side; a compensation surface is also provided at the junction of the upper side and the inner side, and the piston ring can be twisted or not twisted in a predetermined direction by the balance between the compensation surface and the conical surface.
[0021] Optionally, the height of the first conical surface is greater than the height of the grinding surface.
[0022] On the other hand, this application also provides a piston, including the piston rings described above.
[0023] The piston ring of this application includes an outer side and a lower side. A first conical surface is formed on the upper part of the outer side, and a grinding surface is formed on the lower part. The design of the first conical surface results in a smaller blow-by volume and lower oil consumption for the piston ring. The grinding surface design increases the contact area between the piston ring and the cylinder liner, reducing wear. Furthermore, due to the presence of the first conical surface, under high combustion pressure, the first conical surface is subjected to pressure that causes the entire piston ring to twist outwards at the top and downwards at the outer side. Therefore, the outer side of the lower side of the piston ring is prone to wear against the bottom wall of the ring groove. Over time, this ultimately increases the blow-by volume between the piston ring and the ring groove, significantly increasing oil consumption. This application forms a first angle between the lower side of the piston ring and the bottom wall of the ring groove. This reduces the contact pressure between the lower side of the piston ring and the bottom wall of the ring groove when the first conical surface of the piston ring is subjected to external force and torsion. This results in less wear between the lower side of the piston ring and the bottom wall of the ring groove, ensuring that the blow-by volume and oil consumption are low over long-term use. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of a piston ring disposed in a ring groove according to one embodiment of this application.
[0025] Figure 2 The curve showing the relationship between the relative angle between the lower side of the piston ring and the bottom wall and the maximum contact surface pressure is provided for another embodiment of this application.
[0026] Figure 3 A schematic diagram of a piston ring disposed within a ring groove, according to another embodiment of this application.
[0027] Figure 4 A schematic diagram of a piston ring disposed within a ring groove according to another embodiment of this application.
[0028] Figure 5 This is a schematic diagram of the structure of a piston ring provided in another embodiment of this application.
[0029] Figure 6 This is a schematic diagram of the structure of a piston ring provided in another embodiment of this application.
[0030] Figure 7 This is a schematic diagram of the structure of a piston ring provided in another embodiment of this application.
[0031] Figure 8 This is a schematic diagram of the structure of a piston ring provided in another embodiment of this application.
[0032] Figure 9 This is a schematic diagram of the structure of a piston ring provided in another embodiment of this application.
[0033] Figure 10 This is a schematic diagram of the structure of a piston ring provided in another embodiment of this application.
[0034] Figure 11 This is a schematic diagram of the structure of a piston ring provided in another embodiment of this application.
[0035] Explanation of reference numerals in the attached figures
[0036] Piston ring - 100; Outer side - 110; First conical surface - 111; Grinding surface - 112; First arc-shaped transition surface - 113; Second arc-shaped transition surface - 114; Lower side - 120; Upper side - 130; Inner side - 140; Compensation surface - 150;
[0037] Annular groove -200; Bottom wall -210;
[0038] Cylinder liner-300. Detailed Implementation
[0039] To make the technical solution and beneficial effects of this application more apparent and understandable, a detailed description is provided below by listing specific embodiments. The accompanying drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to more clearly show the details of the local features; unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical field to which this application pertains.
[0040] As a specific embodiment of this utility model, such as Figure 1 As shown, this embodiment provides a piston ring 100, which can be the top ring of a piston. The piston ring 100 is disposed within an annular groove 200 of the piston. The annular groove 200 may include a bottom wall 210.
[0041] Specifically, such as Figure 1 As shown, the piston ring 100 in this embodiment may include an outer surface 110 (i.e., a working surface or running surface, the outer surface 110 abutting against the cylinder liner 300) and a lower surface 120, the lower surface 120 contacting the bottom wall 210 of the ring groove 200. The outer surface 110 may include an upper first conical surface 111 and a lower grinding surface 112. A first included angle α is formed between the plane containing the lower surface 120 and the bottom wall 210, the opening of the first included angle α facing outwards; wherein the angle range of the first included angle α is 10′~10°.
[0042] Specifically, in this embodiment, a first conical surface 111 is formed above the outer surface 110, and a grinding surface 112 is formed below it. The design of the first conical surface 111 results in a smaller blow-by volume and lower oil consumption for the piston ring 100. The design of the grinding surface 112 increases the contact area between the piston ring 100 and the cylinder liner 300, reducing wear. Furthermore, due to the presence of the first conical surface 111, under high combustion pressure, the first conical surface 111 is subjected to a pressure that causes the upper part of the entire piston ring 100 to twist outward, and the outer part to twist downward accordingly. Therefore, the outer side of the lower surface 120 of the piston ring 100 is prone to wear with the bottom wall 210 of the ring groove 200. Over time, this will eventually increase the blow-by volume between the piston ring 100 and the ring groove 200, and significantly increase oil consumption. In this embodiment, a first included angle is formed between the lower side surface 120 of the piston ring 100 and the bottom wall 210 of the ring groove 200. When the first conical surface 111 of the piston ring 100 is subjected to external force to twist, the contact pressure between the lower side surface 120 and the bottom wall 210 of the ring groove 200 becomes smaller. This results in less wear between the lower side surface 120 of the piston ring 100 and the bottom wall 210 of the ring groove 200, ensuring that the blow-by volume and oil consumption are both low during long-term use.
[0043] Therefore, it can be seen that the piston ring 100 of this embodiment has low oil consumption and low wear by providing a first conical surface 111 and a grinding surface 112 on the outer side wall and forming a first included angle α between the lower side surface 120 and the bottom wall 210 of the ring groove 200.
[0044] In the prior art, the influence of the relative inclination angle between the lower side surface 120 of the piston ring 100 and the bottom wall 210 of the ring groove 200 on the contact pressure is as follows: Figure 2 As shown in the figure, the larger the relative tilt angle, the lower the contact pressure and the lower the risk of wear. However, the larger the relative tilt angle, the greater the amount of blow-by gas will be. Therefore, it is necessary to balance the relative angle within a certain range.
[0045] Specifically, in this embodiment, the first included angle α ranges from 10′ to 10°, for example, it can be 10′, 2°, 4°, 6°, 8°, or 10°. The specific angle can be selected according to the actual usage conditions. This angle should not be too large or too small, as both excessively large and excessively small angles will fail to achieve the purpose of reducing wear.
[0046] As a specific embodiment of this application, such as Figure 1 As shown, in this embodiment, the plane containing the bottom wall 210 is a horizontal plane, and the lower side surface 120 is an inclined plane.
[0047] As another specific embodiment of this application, such as Figure 3 As shown, in this embodiment, the plane containing the bottom wall 210 is an inclined plane, and the lower side surface 120 is a horizontal plane.
[0048] As another specific embodiment of this application, such as Figure 4 As shown, both the plane containing the bottom wall 210 and the lower side surface 120 are inclined surfaces.
[0049] The above three implementation methods can be designed according to the actual situation.
[0050] As a specific embodiment of this application, such as Figure 1 , 3 As shown in Figure 4, in this embodiment, the first conical surface 111 forms a second included angle b with the vertical direction, and the angle range of the second included angle b is 30′ to 10°. For example, the angle range of the second included angle b can be 30′, 2°, 4°, 6°, 8° or 10°. The specific angle can be selected according to the actual use conditions. This angle should not be too large or too small. If the angle of the second included angle b is too large, it will affect the oil consumption; if the angle is too small, the lubrication will be insufficient and affect the use.
[0051] Specifically, in this embodiment, the height of the first conical surface 111 is greater than the height of the grinding surface 112.
[0052] As a specific embodiment of this application, such as Figure 1 , Figure 3 and Figure 4 As shown, in this embodiment, the grinding surface 112 is a second conical surface, and the inclination direction of the second conical surface is consistent with the inclination direction of the first conical surface 111. The second conical surface forms a third angle c with the vertical direction, and the third angle c is greater than 10' and less than the second angle b.
[0053] When the grinding surface 112 is the second conical surface, due to the presence of the first conical surface 111, the piston ring 100 is subjected to external pressure and internal stress, causing the top of the entire piston ring 100 to twist outward. At this time, the second conical surface is twisted to be parallel to the side wall of the cylinder liner 300, so that the second conical surface and the cylinder liner 300 are in surface contact, thereby reducing wear. The design angle of the second conical surface should not be too large, preferably smaller than the second included angle b.
[0054] As another specific embodiment, such as Figure 5 As shown, in this embodiment, the inclination direction of the second conical surface is opposite to that of the first conical surface 111. The second conical surface forms a third angle c with the vertical direction, and the third angle c is less than -10′ and greater than the negative number of the second angle b.
[0055] In this embodiment, the second conical surface has an inclination direction opposite to that of the first conical surface 111. This is primarily used so that when the piston ring 100 is twisted inwards under the combined action of external force and internal stress, the second conical surface is twisted to be parallel to the cylinder liner 300, resulting in surface contact between the second conical surface and the cylinder liner 300, thereby reducing wear. Similarly, the angle between the second conical surface and the vertical direction in this embodiment should not be too large.
[0056] As a specific embodiment of this application, such as Figure 6 As shown, in this embodiment, the junction of the second conical surface and the first conical surface 111 has a first arc-shaped transition surface 113. The transition through the first arc-shaped transition surface 113 makes the contact area at the junction of the first conical surface 111 and the second conical surface larger when it contacts the cylinder liner 300, further reducing the wear on the piston ring 100 and the cylinder liner 300.
[0057] As another specific embodiment of this application, such as Figure 7 As shown, the grinding surface 112 in this embodiment is a vertical plane. When the piston ring 100 is not subjected to external force or when the external force and internal stress are in balance, the grinding surface 112 can directly contact the cylinder liner 300, thereby reducing wear.
[0058] Preferably, such as Figure 8 As shown, in this embodiment, a second arc-shaped transition surface 114 is provided between the grinding surface 112 and the first conical surface 111. The second arc-shaped transition surface 114 ensures a smooth transition between the vertical plane and the first conical surface 111, avoiding excessive wear between the junction and the cylinder liner 300, and reducing the wear of the piston ring 100 and the cylinder liner 300.
[0059] As a specific embodiment of this application, such as Figure 9 As shown, the grinding surface 112 in this embodiment is an arc-shaped surface. In this embodiment, no matter how the piston ring 100 twists, the contact between the grinding surface 112 and the piston ring 100 is always surface-to-surface contact, which greatly reduces the wear of the piston ring 100 and the cylinder liner 300.
[0060] As a specific embodiment of this application, such as Figure 10 As shown, the piston ring 100 in this embodiment may further include an upper side surface 130 and an inner side surface 140. A compensation surface 150 is also provided at the junction of the upper side surface 130 and the inner side surface 140. Through the balance between the compensation surface 150 and the conical surface, the piston ring 100 may twist or not twist in a predetermined direction.
[0061] The specific shape of the compensation surface 150 in this embodiment is not limited, but is mainly related to its area.
[0062] Generally, when the area of the compensation surface 150 is substantially the same as the area of the first conical surface 111, the internal stress on the inner and outer sides of the entire piston ring 100 is essentially balanced. In this case, the piston ring 100 will not twist due to internal stress when not subjected to external force. When the area of the compensation surface 150 is greater than the area of the first conical surface 111, the piston ring 100 will twist inwards from the top when not subjected to external force. When the area of the compensation surface 150 is smaller than the area of the first conical surface 111, the piston ring 100 will twist outwards from the top when not subjected to external force.
[0063] The primary function of the compensation surface 150 in this embodiment is to balance the internal stress in the piston ring 100 caused by the presence of the first conical surface 111. Therefore, the compensation surface 150 only needs to be designed to have the same area as the first conical surface 111. Its structure can be planar (e.g., Figure 10 As shown), curved surfaces or other angled surfaces (such as...) Figure 11 As shown, it is a folded surface. Preferably, the compensation surface 150 is symmetrically arranged with the first conical surface 111.
[0064] Of course, in other embodiments, if the piston ring 100 is to be twisted in a predetermined direction, the area of the compensation surface 150 can be designed according to the actual situation.
[0065] As a specific embodiment of this application, this embodiment provides a piston, which may include the piston ring 100.
[0066] In this application, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "height," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the purpose of simplifying the description of this application and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. In other words, they should not be construed as limitations on this application.
[0067] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating the relative importance of the indicated features or the number of indicated technical features. Therefore, a feature specified as "first" or "second" may explicitly include at least one of those features. In this application, "multiple" means at least two, such as two, three, etc.; "several" means at least one, such as one, two, three, etc., unless otherwise explicitly specified.
[0068] In this application, unless otherwise expressly defined, the terms "installation," "connection," "linking," "fixing," "setting," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0069] In this application, unless otherwise expressly defined, the terms "above," "on top of," "over," "above," "below," "below," "below," or "below" for "first feature over second feature" can refer to the first and second features being in direct contact, or to the first and second features being in indirect contact through an intermediate medium. Furthermore, "above," "over," and "below" for "first feature over second feature" can mean the first feature is directly above or diagonally above the second feature, or simply indicates that the horizontal height of the first feature is higher than the horizontal height of the second feature. Similarly, "below," "below," and "below" for "first feature over second feature" can mean the first feature is directly below or diagonally below the second feature, or simply indicates that the horizontal height of the first feature is lower than the horizontal height of the second feature.
[0070] It should be understood that the above embodiments are exemplary and are not intended to encompass all possible implementations included in the claims. Various modifications and changes can be made to the above embodiments without departing from the scope of this disclosure. Similarly, the various technical features of the above embodiments can be arbitrarily combined to form other embodiments of this application that may not be explicitly described. Therefore, the above embodiments only illustrate several implementations of this application and do not limit the scope of protection of this patent application.
Claims
1. A piston ring, wherein the piston ring is disposed within a ring groove, the ring groove comprising a bottom wall, characterized in that, The piston ring includes: The outer surface includes a first conical surface located above and a grinding surface located below; and The lower side surface forms a first angle with the plane containing the bottom wall, and the opening of the first angle faces outward; wherein the angle range of the first angle is 10′~10°.
2. The piston ring according to claim 1, characterized in that, The plane containing the bottom wall is a horizontal plane, and the lower side surface is an inclined surface; or The plane containing the bottom wall is an inclined plane, and the lower side surface is a horizontal plane; or Both the plane containing the bottom wall and the lower side surface are inclined surfaces.
3. The piston ring according to claim 1, characterized in that, The first conical surface forms a second angle with the vertical direction, and the angle of the second angle ranges from 30′ to 10°.
4. The piston ring according to claim 3, characterized in that, The grinding surface is a second conical surface, and the inclination direction of the second conical surface is consistent with the inclination direction of the first conical surface; The second conical surface forms a third angle with the vertical direction, and the third angle is greater than 10' and less than the second angle.
5. The piston ring according to claim 4, characterized in that, The inclination direction of the second cone surface is opposite to that of the first cone surface; The second conical surface forms a third angle with the vertical direction, and the third angle is less than -10′ and greater than the negative number of the second angle.
6. The piston ring according to claim 4 or 5, characterized in that, The second conical surface has a first arc-shaped transition surface at the junction with the first conical surface.
7. The piston ring according to claim 1, characterized in that, The grinding surface is a vertical plane or an arc surface; The intersection of the vertical plane and the first conical surface has a second circular arc transition surface.
8. The piston ring according to any one of claims 1-5, 7, characterized in that, The piston ring also includes an upper side and an inner side; a compensation surface is provided at the junction of the upper side and the inner side, and the piston ring can be twisted or not twisted in a predetermined direction by the balance between the compensation surface and the conical surface.
9. The piston ring according to any one of claims 1-5, 7, characterized in that, The height of the first conical surface is greater than the height of the grinding surface.
10. A piston, characterized in that, The piston ring includes any one of claims 1-9.