Reinforced cylinder liner scraper ring structure

Abstract

The utility model discloses a kind of reinforced cylinder liner carbon scraping ring structures, conical carbon scraping ring structure includes the carbon scraping ring inlayed in the carbon ring inlaying groove of cylinder liner body, carbon scraping ring includes carbon discharge conical surface, carbon discharge conical surface is set in the form of small end downwards, and carbon discharge conical surface is used to automatically discharge carbon deposit.The reinforced cylinder liner carbon scraping ring structure of the utility model is good at the defect that existing technology cannot automatically remove carbon deposit.

Description

Technical Field

[0001] This utility model relates to the field of engine design and manufacturing, and in particular to a reinforced cylinder liner carbon scraping ring structure. Background Technology

[0002] When the engine is running, the piston reciprocates within the cylinder. The carbon scraper ring, a metal ring embedded in the cylinder liner, together with the piston and cylinder head, forms the combustion chamber. The main function of the carbon scraper ring is to remove carbon deposits accumulated on the piston head. Carbon deposits are solid residues produced during engine operation due to incomplete combustion of fuel. They adhere to the piston head and cylinder walls, and excessive accumulation can lead to piston ring sticking and cylinder scoring. Through its special structural design, the carbon scraper ring effectively scrapes away carbon deposits during piston movement, preventing further accumulation.

[0003] The working principle of the carbon scraper ring is as follows:

[0004] Carbon Deposit Removal: Pistons in engine components are prone to accumulating a large amount of carbon deposits during operation, which not only increases cylinder liner wear but also leads to increased oil consumption and even carbon buildup. The appearance of carbon scraper rings effectively solves this problem, effectively scraping away carbon deposits during piston movement.

[0005] like Figure 1 As shown, the existing carbon scraper ring structure includes a carbon scraper ring 2' embedded in the carbon ring groove 101' of the cylinder liner body 1'. To reduce the weakening of the head of the cylinder liner body 1', the insert of the carbon scraper ring 2' is required to be as thin as possible, for example, about 2mm. However, due to its own strength, manufacturability, positioning, etc., the insert cannot be made thinner. At the same time, in order to assemble the piston, a flared tooling needs to be designed to close the piston ring. This flared tooling needs to cover the carbon scraper ring groove, and the wall thickness of this section will also be very thin (e.g., Figure 1 As shown in the figure (5.6176mm), the positioning accuracy requirement is also high.

[0006] In addition, the bottom edge of the scraper ring and the bottom surface of the cylinder liner groove are on a plane. Because the platform structure cannot remove carbon deposits by itself, carbon deposits may be blown into the gap. When carbon deposits increase in this area, the accumulation of carbon deposits can cause the scraper ring to tilt or even fall off after sintering, leading to problems such as piston ring jamming.

[0007] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0008] The purpose of this invention is to provide a reinforced cylinder liner carbon scraping ring structure, which can automatically remove carbon deposits, a defect that existing technologies cannot address.

[0009] To achieve the above objectives, this utility model provides a reinforced cylinder liner carbon scraping ring structure. The conical carbon scraping ring structure includes a carbon scraping ring embedded in the carbon ring groove of the cylinder liner body. The carbon scraping ring includes a carbon discharge conical surface, which is arranged with the small end facing down. The carbon discharge conical surface is used to automatically discharge carbon deposits.

[0010] In a preferred embodiment, the carbon scraping ring further includes a positioning disk, the lower part of which is connected to the carbon discharge conical surface.

[0011] In a preferred embodiment, the carbon scraping ring further includes a positioning platform, which is disposed on the lower surface of the positioning disc and is connected to the root of the carbon discharge cone.

[0012] In a preferred embodiment, the carbon scraping ring further includes a carbon scraping through hole, which is coaxially disposed at the central axis of the carbon scraping ring.

[0013] In a preferred embodiment, the carbon ring groove is disposed on the top of the cylinder liner body, and the carbon ring groove includes a carbon discharge cone hole and a positioning step hole; the carbon discharge cone hole is disposed at the lower part of the carbon ring groove, the taper of the carbon discharge cone hole matches that of the carbon discharge cone surface, and the bottom of the carbon discharge cone hole is connected to the inner hole of the cylinder liner body; the positioning step hole is disposed at the top of the carbon ring groove, the bottom surface of the positioning step hole is in contact with the positioning platform surface, and is used for axial positioning of the carbon ring.

[0014] In a preferred embodiment, the inner diameter of the carbon scraping through hole is smaller than the inner diameter of the cylinder liner body.

[0015] Compared with the prior art, the reinforced cylinder liner carbon scraper ring structure of this utility model has the following beneficial effects: This solution replaces the existing cylindrical carbon scraper ring with a carbon scraper ring with a conical surface, so that the carbon deposits blown to the carbon discharge conical surface of the carbon scraper ring can be automatically discharged along the conical surface, solving the defect in the bottom gap of the original carbon scraper ring; the axial positioning of the carbon scraper ring is completed by the positioning platform of the positioning disc set on the top of the carbon scraper ring; at the same time, since the lower part of the carbon ring insert groove of the cylinder liner body is provided with a carbon discharge conical hole, the bottom diameter of the carbon ring insert groove is reduced, thereby increasing the wall thickness of the cylinder liner body at this point, which not only ensures its own strength, manufacturability and positioning accuracy, but also meets the condition of making the carbon scraper ring as thin as possible, which can obtain a smaller cutting edge wall thickness while ensuring the strength of the entire insert body, and can also eliminate the need for tooling to assemble piston rings. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a carbon scraping ring structure according to an embodiment of the prior art;

[0017] Figure 2 This is a schematic diagram of the carbon scraping ring structure according to an embodiment of the present invention.

[0018] Explanation of key figure labels:

[0019] 1-Cylinder liner body, 101-Carbon ring groove, 2-Carbon scraping ring, 201-Carbon discharge conical surface, 202-Positioning platform, 203-Carbon scraping through hole. Detailed Implementation

[0020] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, it should be understood that the scope of protection of this utility model is not limited to the specific embodiments.

[0021] Unless otherwise expressly stated, throughout the specification and claims, the term "comprising" or its variations such as "including" or "comprises" shall be understood to include the stated elements or components without excluding other elements or other components.

[0022] like Figure 2 As shown, according to a preferred embodiment of the present invention, a reinforced cylinder liner carbon scraping ring structure includes a carbon scraping ring 2 embedded in the carbon ring groove 101 of the cylinder liner body 1. The carbon scraping ring 2 includes a carbon discharge cone surface 201, which is arranged with the small end facing down. The carbon discharge cone surface 201 is used to automatically discharge carbon deposits.

[0023] In a preferred embodiment, the carbon scraping ring 2 further includes a positioning disk, the lower part of which is connected to the carbon discharge cone surface 201.

[0024] In a preferred embodiment, the carbon scraping ring 2 further includes a positioning platform 202, which is disposed on the lower surface of the positioning disc. The positioning platform 202 is connected to the root of the carbon discharge cone surface 201, and the positioning platform 202 is used for axial positioning of the carbon scraping ring 2.

[0025] In a preferred embodiment, the carbon ring groove 101 is disposed on the top of the cylinder liner body 1. The carbon ring groove 101 includes a carbon discharge cone hole and a positioning step hole. The carbon discharge cone hole is disposed at the lower part of the carbon ring groove 101, and the taper of the carbon discharge cone hole matches that of the carbon discharge cone surface 201. The bottom of the carbon discharge cone hole is connected to the inner hole of the cylinder liner body 1. The positioning step hole is disposed at the top of the carbon ring groove 101, and the bottom surface of the positioning step hole is in contact with the positioning platform 202 and is used for axial positioning of the scraping carbon ring 2.

[0026] In a preferred embodiment, since a carbon discharge conical hole is provided at the lower part of the carbon ring groove 101 of the cylinder liner body 1, the bottom diameter of the carbon ring groove 101 is reduced, thereby increasing the wall thickness H of the cylinder liner body 1 at that location. This ensures the strength, manufacturability, and positioning accuracy of the cylinder liner body 1, while also satisfying the condition of making the carbon scraping ring 2 as thin as possible. This results in a smaller cutting edge wall thickness while ensuring the strength of the entire ring body.

[0027] In summary, the reinforced cylinder liner carbon scraper ring structure of this utility model has the following beneficial effects: This solution replaces the existing cylindrical carbon scraper ring with a carbon scraper ring featuring a conical surface. This allows for localized thinning of the functional parts at the head of the carbon scraper ring, solving the process and strength issues inherent in making the entire cylindrical carbon scraper ring body very thin. It also allows the carbon deposits blown onto the conical surface of the carbon scraper ring to be automatically discharged along the conical surface, resolving the defects in the bottom gap of the original carbon scraper ring. The axial positioning of the carbon scraper ring is achieved by the positioning platform of a positioning disc located at other positions on the carbon scraper ring, thus separating the carbon scraping and axial positioning functions of the original cylindrical carbon scraper ring's lower end face. Furthermore, because the carbon ring groove of the cylinder liner body is changed to a conical groove surface, the minimum wall thickness is increased, effectively increasing the strength of the cylinder liner body. Additionally, the added conical groove surface at the head of the cylinder liner body can be directly used to gather the piston rings during piston installation, eliminating the need for tooling during piston ring assembly.

[0028] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the present invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the present invention, as well as various different choices and variations. The scope of the present invention is intended to be defined by the claims and their equivalents.

Claims

1. A reinforced cylinder liner carbon scraping ring structure, characterized in that, It includes a carbon scraping ring, which is embedded in the carbon ring groove of the cylinder liner body. The carbon scraping ring includes a carbon discharge cone surface, which is arranged with the small end facing down. The carbon discharge cone surface is used to automatically discharge carbon deposits.

2. The reinforced cylinder liner carbon scraper ring structure as described in claim 1, characterized in that, The carbon scraping ring also includes a positioning disc, the lower part of which is connected to the carbon discharge conical surface.

3. The reinforced cylinder liner carbon scraper ring structure as described in claim 2, characterized in that, The carbon scraping ring also includes a positioning platform, which is disposed on the lower surface of the positioning disk, and the positioning platform is connected to the root of the carbon discharge cone.

4. The reinforced cylinder liner carbon scraper ring structure as described in claim 2, characterized in that, The carbon scraping ring also includes a carbon scraping through hole, which is coaxially disposed at the central axis of the carbon scraping ring.

5. The reinforced cylinder liner carbon scraper ring structure as described in claim 3, characterized in that, The carbon ring groove is disposed on the top of the cylinder liner body, and the carbon ring groove includes: A carbon discharge conical hole is provided in the lower part of the carbon ring insert groove. The taper of the carbon discharge conical hole matches that of the carbon discharge conical surface, and the bottom of the carbon discharge conical hole connects to the inner hole of the cylinder liner body. A positioning step hole is provided at the top of the carbon ring insert groove. The bottom surface of the positioning step hole is in contact with the positioning platform surface and is used for axial positioning of the scraping carbon ring.

6. The reinforced cylinder liner carbon scraper ring structure as described in claim 4, characterized in that, The inner diameter of the carbon scraping through hole is smaller than the inner diameter of the cylinder liner body.

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