Piston ring and engine
By setting an inclined flow channel on the inner ring of the piston ring, the piston ring is driven to rotate by the tangential force generated by the high-pressure gas, which solves the problem of piston ring jamming and reduces the risk of cylinder scoring.
Patent Information
- Application Number
- CN202520105874.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-16
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2035-01-16
AI Technical Summary
In existing technologies, as engine operating time increases, piston rings are prone to getting stuck in the ring grooves, leading to cylinder scoring problems.
Design a piston ring with an inclined flow channel on the inner ring. When high-pressure gas passes through this channel, it generates a tangential force, which drives the piston ring to rotate and squeeze out carbon deposits to prevent it from seizing.
This effectively reduces the risk of piston rings getting stuck in the ring grooves and decreases the occurrence of cylinder scoring.
Smart Images
Figure CN223562931U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of engine especially a piston ring and engine. BACKGROUND
[0002] In prior art, the piston in the engine is slidably arranged in the cylinder liner, the piston is provided with a ring groove, and the ring groove is used for mounting the piston ring. With the increase of the working time of the engine, the carbon deposit in the ring groove also continuously increases, and the piston ring arranged in the ring groove is easily stuck, and the problem of cylinder pulling occurs. SUMMARY
[0003] Therefore, the utility model embodiment provides a piston ring and engine, the piston ring can rotate in the ring groove, and the situation that the piston ring is stuck in the ring groove is reduced.
[0004] In a first aspect, the utility model embodiment provides a piston ring, which comprises: coaxially arranged inner ring and outer ring, the inner ring is arranged on the inner side of the outer ring, the inner ring is provided with at least one flow guide channel, the flow guide channel penetrates the inner ring along the axial direction of the outer ring, and the side wall of the flow guide channel is arranged inclinedly relative to the axial direction of the outer ring.
[0005] In this embodiment, the piston ring is applied to the engine, and part of the high-pressure gas can flow out along the flow guide channel arranged on the inner ring when the engine works. Since the side wall of the flow guide channel is arranged inclinedly relative to the axial direction of the outer ring, the gas flowing out generates an inclined force, and the inclined force can decompose a tangential force perpendicular to the radial direction of the piston ring, the tangential force can drive the piston ring to rotate, so as to extrude the carbon deposit in the ring groove, and then the piston ring is prevented from being stuck in the ring groove.
[0006] Wherein, when the piston ring rotates in the ring groove, the tangential force needs to be greater than the friction force between the piston ring and the ring groove.
[0007] In one embodiment, the included angle between the side wall of the flow guide channel and the axial direction of the outer ring is between 30 DEG and 60 DEG.
[0008] In one embodiment, the inner ring is provided with at least one guide structure, and the guide structure is arranged correspondingly with the flow guide channel.
[0009] In one embodiment, the guide structure comprises a first guide block, the first guide block has a first guide surface, the first guide surface is connected with one of the side walls of the flow guide channel, and the first guide surface and the side wall are located in the same plane.
[0010] In one embodiment, the guiding structure includes a second guide block having a second guide surface connected to another sidewall of the flow channel, and the second guide surface and the other sidewall are located in the same plane.
[0011] In one embodiment, the first guide surface and the second guide surface are arranged in parallel.
[0012] In one embodiment, there are multiple flow channels, and the multiple flow channels are evenly distributed along the axial direction of the outer ring.
[0013] In one embodiment, all of the flow channels are the same size.
[0014] In one embodiment, the height of the outer ring is greater than the height of the inner ring along the axial direction of the outer ring.
[0015] Secondly, this application also provides an engine, including a cylinder liner, a piston, and piston rings as described in any of the technical solutions of the first aspect. The cylinder liner has a cylinder bore, the piston is slidably disposed in the cylinder bore, the piston has at least one ring groove, and the piston ring is disposed in the ring groove. This engine, with the aforementioned piston rings, can reduce the risk of cylinder scoring. Attached Figure Description
[0016] Figure 1 A schematic diagram of the piston structure provided in an embodiment of this utility model;
[0017] Figure 2 for Figure 1 A magnified view of point a;
[0018] Figure 3 A top view of the piston provided in an embodiment of this utility model;
[0019] Figure 4 for Figure 3 Sectional view of AA;
[0020] Figure 5 for Figure 4 A magnified view of point b;
[0021] Figure 6 for Figure 4 A magnified view of point c.
[0022] Icons: 10-Outer ring; 20-Inner ring; 21-Guiding channel; 22-Guiding structure; 220-First guide block; 221-First guide surface. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0024] The piston ring provided in the embodiments of this utility model will be described in detail below with reference to the accompanying drawings.
[0025] Figure 1 A schematic diagram of the piston structure provided in an embodiment of this utility model; Figure 2 for Figure 1 A magnified view of point a; Figure 3 A top view of the piston provided in an embodiment of this utility model; Figure 4 for Figure 3 Sectional view of AA; Figure 5 for Figure 4 A magnified view of point b. (Refer to...) Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The piston ring provided in this embodiment includes an inner ring 20 and an outer ring 10, which are coaxially arranged. The diameter of the inner ring 20 is smaller than that of the outer ring 10. The inner ring 20 is disposed inside the outer ring 10, and the inner ring 20 and the outer ring 10 can be formed by a single-piece molding process. The inner ring 20 is provided with at least one flow channel 21, which penetrates the inner ring 20 along the axial direction of the outer ring 10, and the sidewall of the flow channel 21 is inclined relative to the axial direction of the outer ring 10. When piston rings are used in an engine and the engine is running, some of the high-pressure combustion gases can escape along the guide channel 21 provided on the inner ring 20. Since the sidewall of the guide channel 21 is inclined relative to the axis of the outer ring 10, the escaped gas will generate an inclined force. The inclined force can be decomposed into a tangential force perpendicular to the radial direction of the piston ring. This tangential force can drive the piston ring to rotate. During the rotation of the piston ring in the ring groove, it can squeeze out the carbon deposits in the ring groove, thereby preventing the piston ring from getting stuck in the ring groove and reducing the occurrence of cylinder scoring.
[0026] When the piston ring rotates in the ring groove, the tangential force needs to be greater than the frictional force between the piston ring and the ring groove.
[0027] When the flow channel 21 is opened on the inner ring 20, the angle between the side wall of the flow channel 21 and the axial direction of the outer ring 10 can be set between 30° and 60° so that the tangential force of the gas that escapes through the flow channel 21 is larger and the piston ring can more easily overcome the friction between the piston ring and the ring groove.
[0028] Figure 6 For Figure 4 enlarged view of c. Referring to Figures 1 to 6 In the above embodiment, at least one guide structure 22 can be arranged on the inner ring 20, and the guide structure 22 corresponds to the flow guide channel 21. The arrangement of the guide structure 22 can increase the path of the gas moving in the flow guide channel 21, so that the gas can continuously drive the inner ring 20 to rotate, thereby driving the piston ring to rotate.
[0029] Specifically, the number of guide structures 22 can also be less than the number of flow guide channels 21, that is, when the flow guide channels 21 are multiple, some of the flow guide channels 21 are provided with guide structures 22.
[0030] The flow guide structure can include a first guide block 220, and the first guide block 220 has a first guide surface 221, the first guide surface 221 is connected with one side wall of the flow guide channel 21, and the first guide surface 221 is located in the same plane as the side wall. The arrangement of the first guide surface 221 actually increases the length of one side wall of the flow guide channel 21, thereby increasing the path of the gas flow, so as to improve the effect of driving the piston ring to rotate. And the first guide surface 221 and the side wall are located in the same plane, which can also ensure the flow of the gas.
[0031] In the axial direction of the outer ring 10, the sum of the height of the first guide block 220 and the height of the inner ring 20 is less than or equal to the height of the outer ring 10.
[0032] The flow guide structure can also include a second guide block, and the second guide block has a second guide surface, the second guide surface is connected with another side wall of the flow guide channel 21, and the second guide surface is located in the same plane as the other side wall. The arrangement of the first guide block 220 and the second guide block actually increases the length of the flow guide channel 21, so as to increase the path of the gas flow, thereby improving the effect of driving the piston ring to rotate by the gas.
[0033] In the above embodiment, the first guide surface 221 and the second guide surface can be arranged in parallel, that is, the two side walls of the flow guide channel 21 are also arranged in parallel. In some other embodiments, the first guide surface 221 and the second guide surface can also be arranged not in parallel, at this time, the two side walls of the flow guide channel 21 are also not arranged in parallel, as long as the included angle with the axial direction of the outer ring 10 is between 30° and 60°.
[0034] In the above embodiments, the number of the flow guide channels 21 can be one, two, three, four, five or six, etc. When the number of the flow guide channels 21 is multiple, the multiple flow guide channels 21 are evenly distributed along the axial direction of the outer ring 10, and the even distribution of the multiple flow guide channels 21 can make the piston ring more easily overcome the friction between the piston ring and the ring groove. The multiple flow guide channels 21 actually divide the inner ring 20 into multiple, i.e., the multiple flow guide channels 21 can divide the multiple inner rings 20 into multiple sections. Specifically, two flow guide channels 21 divide the inner ring 20 into two sections, three flow guide channels 21 divide the inner ring 20 into three sections, and so on. In some embodiments, when the number of the flow guide channels 21 is one, it can be understood that the inner ring 20 has two ends, the two ends are not connected, and the end faces of the two ends are both inclined surfaces, which are the two side walls of the flow guide channel 21. When the number of the flow guide channels 21 is two, it can be understood that the inner ring 20 includes two sub-rings, the two sub-rings are arranged in a spaced manner, and the gap between the two sub-rings is the flow guide channel 21, and the two side walls of the flow guide channel 21 are the two ends of the two sub-rings. This is carried out by analogy, and will not be described here.
[0035] In the above embodiments, when the number of the flow guide channels 21 is multiple, the size of each flow guide channel 21 can be the same. The same size of the flow guide channel 21 can make the gas more easily drive the piston ring to rotate in the ring groove when the gas flows along the flow guide channel 21.
[0036] In an embodiment, along the axial direction of the outer ring 10, the height of the outer ring 10 is greater than the height of the inner ring 20.
[0037] The embodiments of the present application also provide an engine, which comprises a cylinder liner, a piston and the piston ring of any of the technical solutions in the first aspect, the cylinder liner has a cylinder hole, the piston is slidably arranged in the cylinder hole, the piston is provided with at least one ring groove, and the piston ring is arranged in the ring groove. The engine has the above-mentioned piston ring, and the risk of cylinder scoring can be reduced.
[0038] Obviously, those skilled in the art can make various modifications and variations to the embodiments of the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.
Claims
1. A piston ring characterized by, Comprising: An inner ring and an outer ring coaxially arranged, the inner ring is arranged inside the outer ring, the inner ring is provided with at least one flow guide channel, the flow guide channel penetrates the inner ring along the axial direction of the outer ring, and the side wall of the flow guide channel is arranged obliquely relative to the axial direction of the outer ring.
2. The piston ring of claim 1, wherein The included angle between the side wall of the flow guide channel and the axial direction of the outer ring is between 30° and 60°.
3. The piston ring of claim 1 wherein, At least one guide structure is arranged on the inner ring, and the guide structure is arranged correspondingly with the flow guide channel.
4. The piston ring of claim 3 wherein, The guide structure comprises a first guide block, the first guide block has a first guide surface, the first guide surface is connected with one of the side walls of the flow guide channel, and the first guide surface is located in the same plane as the side wall.
5. The piston ring of claim 4 wherein, The guide structure comprises a second guide block, the second guide block has a second guide surface, the second guide surface is connected with another side wall of the flow guide channel, and the second guide surface is located in the same plane as the other side wall.
6. The piston ring of claim 5 wherein, The first guide surface and the second guide surface are arranged in parallel.
7. The piston ring of claim 1 wherein, The flow guide channel is a plurality of flow guide channels, and the plurality of flow guide channels are uniformly distributed along the axial direction of the outer ring.
8. The piston ring of claim 7, wherein The size of each flow guide channel is the same.
9. The piston ring of claim 1 wherein, Along the axial direction of the outer ring, the height of the outer ring is greater than the height of the inner ring.
10. An engine characterized by, Comprising a cylinder sleeve, a piston and a piston ring according to any one of claims 1 to 9, the cylinder sleeve has a cylinder hole, the piston is slidably arranged in the cylinder hole, at least one ring groove is arranged on the piston, and the piston ring is arranged in the ring groove.