Piston and engine

Abstract

The utility model relates to the technical field of engines, and discloses a piston and an engine, the piston comprises a body part, a skirt part and a heat insulation ring assembly, the body part is provided with a piston top, and the skirt part is connected to one end, back to the piston top, of the body part; at least one heat insulation ring groove and a plurality of piston ring grooves are formed in the circumferential surface of the body part; the at least one heat insulation ring groove is positioned on one side, back to the skirt part, of the piston ring groove; and a heat insulation ring assembly is fixedly sleeved in each heat insulation ring groove. The piston and the engine solve the problem that the temperature of the piston ring is high.

Description

Technical Field

[0001] This utility model relates to the field of engine technology, and in particular to a piston and engine. Background Technology

[0002] The piston is one of the core moving parts of an engine. Specifically, the top of the piston forms the main part of the combustion chamber, which makes the piston temperature typically quite high, and consequently, the piston rings mounted on the piston also reach high temperatures. High piston ring temperatures can easily lead to problems such as oil coking, high oil consumption, and piston ring wear. Utility Model Content

[0003] This invention provides a piston and engine that can improve the problem of high piston ring temperature.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A piston includes a body portion, a skirt portion, and a heat insulation ring assembly, the body portion having a piston top, and the skirt portion being connected to one end of the body portion opposite to the piston top.

[0006] The circumferential surface of the body portion is formed with at least one heat insulation ring groove and a plurality of piston ring grooves, wherein the at least one heat insulation ring groove is located on the side of the piston ring groove facing away from the skirt portion; and each heat insulation ring groove is fixedly fitted with a heat insulation ring assembly.

[0007] Optionally, the heat insulation annular groove includes a top surface and a bottom surface opposite each other in the axial direction of the body portion, and the heat insulation annular groove also includes a side surface connected between the top surface and the bottom surface;

[0008] The heat insulation ring assembly abuts against at least a portion of the top surface, at least a portion of the bottom surface, and all of the side surfaces.

[0009] Optionally, the heat insulation ring assembly includes a first heat insulation ring, which is fixedly fitted in the corresponding heat insulation ring groove, and the first heat insulation ring abuts against at least a portion of the top surface, at least a portion of the bottom surface, and all of the side surfaces.

[0010] Optionally, the first heat insulation ring includes a first part, a second part, and a connecting part. The first part and the second part are arranged opposite to each other in the axial direction of the main body, and the ends of the first part and the second part facing the side are both connected to the connecting part. The connecting part is spaced from the ends of the first part and the second part facing away from the side.

[0011] The surface of the first part facing away from the second part abuts against the top surface, the surface of the second part facing away from the first part abuts against the bottom surface, and the connecting part abuts against the side surface.

[0012] Optionally, the surface of the first part facing away from the second part covers the top surface.

[0013] Optionally, the surface of the second part facing away from the first part covers the bottom surface.

[0014] Optionally, the heat insulation ring assembly includes a second heat insulation ring, which is fixedly fitted onto the outside of the corresponding first heat insulation ring.

[0015] Optionally, the shape of the second heat insulation ring is the same as that of the first heat insulation ring.

[0016] Alternatively, at least one of the following conditions must be met:

[0017] The first heat insulation ring is made of stainless steel, zirconium, or ceramic;

[0018] The second heat insulation ring is made of stainless steel, zirconium, or ceramic.

[0019] This utility model also provides an engine, including any of the pistons provided in the above technical solutions.

[0020] In this design, a heat-insulating ring groove is added to the piston body, and a heat-insulating ring assembly is fixed in the heat-insulating ring groove. This can block the heat from the piston top when combustion occurs in the combustion chamber, significantly reducing the heat transferred from the piston top to the piston ring groove and piston ring, lowering the temperature of the piston ring groove and piston ring, reducing the possibility of oil coking and piston ring wear, and helping to reduce oil consumption. Attached Figure Description

[0021] Figure 1 A cross-sectional view of a piston provided for an embodiment of this utility model;

[0022] Figure 2 for Figure 1 A magnified view of a portion of the image;

[0023] Figure 3 A partially enlarged view of another piston provided in an embodiment of this utility model;

[0024] Icons: 1-Body part; 11-Piston top; 12-Insulation ring groove; 121-Top surface; 122-Bottom surface; 123-Side surface; 13-Piston ring groove; 2-Skirt; 3-Insulation ring assembly; 31-First insulation ring; 311-First part; 312-Second part; 313-Connecting part; 32-Second insulation ring. Detailed Implementation

[0025] 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.

[0026] Figure 1 A cross-sectional view of a piston provided in an embodiment of this application is shown for ease of understanding only. Figure 1 The portion of the central insulating ring groove 12 located on the right side of the axis of the main body 1 shows the insulating ring assembly 3. (As shown...) Figure 1 As shown in the figure, an embodiment of this application provides a piston comprising a body portion 1, a skirt portion 2, and a heat insulation ring assembly 3. The body portion 1 has a piston crown 11, which, together with the cylinder head and cylinder wall, forms a combustion chamber. The skirt portion 2 is connected to the end of the body portion 1 facing away from the piston crown 11. At least one heat insulation ring groove 12 and multiple piston ring grooves 13 are formed on the circumferential surface of the body portion 1. The at least one heat insulation ring groove 12 is located on the side of the piston ring groove 13 facing away from the skirt portion 2. A heat insulation ring assembly 3 is fixedly fitted in each heat insulation ring groove 12. In this design, a heat insulation ring groove 12 is added to the piston body portion 1, and a heat insulation ring assembly 3 is fixedly fitted in the heat insulation ring groove 12. This allows the heat from the piston crown 11 to be blocked during combustion in the combustion chamber, significantly reducing the heat transferred from the piston crown 11 to the piston ring grooves 13 and piston rings, lowering the temperature of the piston ring grooves 13 and piston rings, thereby reducing the possibility of oil coking and piston ring wear, and also contributing to reduced oil consumption.

[0027] It is easy to understand that the heat insulation ring assembly 3 will not extend beyond the circumference of the main body 1.

[0028] like Figure 2 As shown, in some specific technical solutions, the heat insulation ring groove 12 includes a top surface 121 and a bottom surface 122 opposite to each other in the axial direction of the body portion 1. The heat insulation ring groove 12 also includes a side surface 123 connecting the top surface 121 and the bottom surface 122. The heat insulation ring assembly 3 abuts against at least a portion of the top surface 121, at least a portion of the bottom surface 122, and all of the side surface 123. This solution can reliably block heat from the piston top 11, and has stronger reliability in reducing the temperature of the piston ring groove 13 and piston rings, reducing the possibility of oil coking and piston ring wear, and reducing oil consumption.

[0029] In a specific implementation, the heat insulation ring assembly 3 may include a first heat insulation ring 31, which is fixedly fitted in the corresponding heat insulation ring groove 12, and the first heat insulation ring 31 abuts against at least a portion of the top surface 121, at least a portion of the bottom surface 122 and all of the side surfaces 123.

[0030] Exemplarily, the first heat insulation ring 31 includes a first part 311, a second part 312, and a connecting part 313. The first part 311 and the second part 312 are arranged opposite to each other in the axial direction of the body part 1, and the ends of the first part 311 and the second part 312 facing the side 123 are both connected to the connecting part 313. The connecting part 313 is spaced apart from the ends of the first part 311 and the second part 312 facing away from the side 123. The surface of the first part 311 facing away from the second part 312 abuts against the top surface 121, the surface of the second part 312 facing away from the first part 311 abuts against the bottom surface 122, and the connecting part 313 abuts against the side 123. This solution ensures reliability in reducing the temperature of the piston ring groove 13 and the piston ring, reducing the possibility of oil coking and piston ring wear, and reducing oil consumption, while the heat insulation ring assembly 3 is lighter, which also helps to save materials and costs.

[0031] In some specific technical solutions, the surface of the first part 311 facing away from the second part 312 covers the top surface 121, so as to improve the reliability in terms of reducing the temperature of the piston ring groove 13 and piston ring, reducing the possibility of oil coking and piston ring wear, and reducing oil consumption.

[0032] In some specific technical solutions, the surface of the second part 312 facing away from the first part 311 covers the bottom surface 122, so as to improve the reliability in terms of reducing the temperature of the piston ring groove 13 and piston ring, reducing the possibility of oil coking and piston ring wear, and reducing oil consumption.

[0033] In practical implementation, the heat insulation ring assembly 3 may include multiple heat insulation rings, such as Figure 3 As shown, the heat insulation ring assembly 3 also includes a second heat insulation ring 32, which is fixedly sleeved on the outside of the corresponding first heat insulation ring 31, thereby further blocking the heat from the piston top 11 from being transferred to the piston ring groove 13.

[0034] Of course, the number of heat insulation rings in heat insulation ring assembly 3 can also be more than two, which will not be listed here.

[0035] When specifically setting the second heat insulation ring 32, the shape of the second heat insulation ring 32 can be the same as the shape of the first heat insulation ring 31, or it can be different from the shape of the first heat insulation ring 31, depending on the actual needs.

[0036] In some specific technical solutions, the first heat insulation ring 31 is made of stainless steel, zirconium or other metals with low thermal conductivity, or the first heat insulation ring 31 is made of ceramic.

[0037] In some specific technical solutions, the second heat insulation ring 32 is made of stainless steel, zirconium or other metals with low thermal conductivity, or the second heat insulation ring 32 is made of ceramic.

[0038] An engine provided in this application includes the piston described above. In this design, a heat-insulating ring groove 12 is added to the piston body 1, and a heat-insulating ring assembly 3 is fixed in the heat-insulating ring groove 12. This can block the heat from the piston top 11 when combustion occurs in the combustion chamber, significantly reducing the heat transferred from the piston top 11 to the piston ring groove 13 and piston rings, lowering the temperature of the piston ring groove 13 and piston rings, reducing the possibility of oil coking and piston ring wear, and contributing to the reduction of oil consumption.

[0039] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A piston, characterized in that, It includes a body portion, a skirt portion, and a heat insulation ring assembly, wherein the body portion has a piston top, and the skirt portion is connected to the end of the body portion opposite to the piston top; The circumferential surface of the body portion is formed with at least one heat insulation ring groove and a plurality of piston ring grooves, wherein the at least one heat insulation ring groove is located on the side of the piston ring groove facing away from the skirt portion; and each heat insulation ring groove is fixedly fitted with a heat insulation ring assembly.

2. The piston according to claim 1, characterized in that, The heat insulation annular groove includes a top surface and a bottom surface opposite each other in the axial direction of the main body, and the heat insulation annular groove also includes a side surface connected between the top surface and the bottom surface; The heat insulation ring assembly abuts against at least a portion of the top surface, at least a portion of the bottom surface, and all of the side surfaces.

3. The piston according to claim 2, characterized in that, The heat insulation ring assembly includes a first heat insulation ring, which is fixedly fitted in the corresponding heat insulation ring groove, and the first heat insulation ring abuts against at least a portion of the top surface, at least a portion of the bottom surface, and all of the side surfaces.

4. The piston according to claim 3, characterized in that, The first heat insulation ring includes a first part, a second part, and a connecting part. The first part and the second part are arranged opposite to each other in the axial direction of the main body, and the ends of the first part and the second part facing the side are both connected to the connecting part. The connecting part is spaced from the ends of the first part and the second part facing away from the side. The surface of the first part facing away from the second part abuts against the top surface, the surface of the second part facing away from the first part abuts against the bottom surface, and the connecting part abuts against the side surface.

5. The piston according to claim 4, characterized in that, The surface of the first part facing away from the second part covers the top surface.

6. The piston according to claim 4, characterized in that, The surface of the second part facing away from the first part covers the bottom surface.

7. The piston according to any one of claims 4 to 6, characterized in that, The heat insulation ring assembly includes a second heat insulation ring, which is fixedly fitted onto the outside of the corresponding first heat insulation ring.

8. The piston according to claim 7, characterized in that, The shape of the second heat insulation ring is the same as that of the first heat insulation ring.

9. The piston according to claim 8, characterized in that, At least one of the following conditions must be met: The first heat insulation ring is made of stainless steel, zirconium, or ceramic; The second heat insulation ring is made of stainless steel, zirconium, or ceramic.

10. An engine, characterized in that, Includes the piston as described in any one of claims 1 to 9.

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