Cylinder sleeve component and engine
By designing the step slope of the carbon scraping ring in the cylinder liner member to clamp the chamfer at the end of the inner hole, the problem of difficulty in arranging the carbon scraping ring in the cylinder liner with a thin wall thickness is solved, low-cost processing and wide applicability are achieved, and engine fuel consumption and wear are reduced.
Patent Information
- Application Number
- CN202422348799.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-26
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-26
AI Technical Summary
In the prior art, it is difficult to arrange the carbide ring for cylinder liners with thin wall thickness, and opening the carbide ring groove will lead to high processing costs and errors that affect assembly.
A cylinder liner member is designed, and the ring body of the carbon scraper ring is placed in the inner hole of the cylinder liner body, the step part is surrounded by the peripheral part of the ring body, and the inclined surface of the step is chamfered and the end of the inner hole is chamfered to achieve radial and axial limits, and avoid the installation of a carbon scraper groove on the cylinder liner body.
It reduces the processing cost of cylinder liner components, expands the scope of application, reduces engine fuel consumption, reduces carbon abrasion in the cylinder liner holes, and improves wear resistance.
Smart Images
Figure CN223136276U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of engines, in particular to a cylinder liner component and an engine. Background Art
[0002] Generally, the cylinder liner of an engine is required to be designed with a carbon scraping ring, which can scrape off the carbon deposits on the piston head by the inner edge of the carbon scraping ring during the reciprocating movement of the piston, so that a thick carbon deposit layer cannot be formed.
[0003] In the related art, the carbon scraping ring is generally arranged on the inner hole of the cylinder liner. A carbon scraping ring groove is arranged on the inner hole of the cylinder liner to place the carbon scraping ring. However, for a cylinder liner with a relatively thick wall, it is convenient to open the carbon scraping ring groove. For a cylinder liner with a relatively thin wall, it is difficult to open the carbon scraping ring groove, resulting in difficulty in arranging the carbon scraping ring. Moreover, opening the carbon scraping ring groove will lead to high processing costs, and the processing error will also affect the assembly of the carbon scraping ring.
[0004] Therefore, how to improve the applicability of the cylinder liner component and facilitate processing is a technical problem that those skilled in the art need to solve at present. Summary of the Utility Model
[0005] The purpose of the utility model is to provide a cylinder liner component and an engine, which can reduce costs and have a wide range of applications.
[0006] To achieve the above purpose, the utility model provides the following technical solutions:
[0007] A cylinder liner component, comprising:
[0008] A cylinder liner body, provided with an inner hole for the piston to reciprocate;
[0009] A carbon scraping ring, comprising a ring body and a step portion. The ring body is placed in the inner hole, the step portion is located at one end of the ring body and surrounds the circumference of the ring body. A step inclined surface is provided on the side of the step axially close to the ring body.
[0010] Moreover, an inner circular surface and an outer circular surface are provided on the ring body. The inner circular surface is adapted to the piston, the outer circular surface is adapted to the inner hole, and the step surface is in chamfered fit connection with the end of the inner hole.
[0011] On the other hand, a transition arc groove is provided between the step inclined surface and the outer circular surface, and the transition arc groove surrounds the circumference of the carbon scraping ring.
[0012] On the other hand, the axial height of the carbon scraping ring is 4 - 15 mm; the wall thickness of the ring body is 1.2 - 3.5 mm, and the diameter of the outer circular surface of the ring body is smaller than the diameter of the inner hole of the cylinder liner body.
[0013] On the other hand, the carbon scraping ring is a gray cast iron carbon scraping ring or a common carbon steel carbon scraping ring.
[0014] On the other hand, the axial angle of the stepped inclined surface with respect to the carbon scraping ring is equal to the axial angle of the end chamfer of the inner hole with respect to the inner hole; the axis of the carbon scraping ring is parallel to the axis of the inner hole.
[0015] On the other hand, the axial angle of the stepped inclined surface with respect to the carbon scraping ring is less than the axial angle of the end chamfer of the inner hole with respect to the inner hole; the axis of the carbon scraping ring is parallel to the axis of the inner hole.
[0016] On the other hand, the angle of the stepped inclined surface with respect to the axis of the carbon scraping ring is 30° ± 10°.
[0017] On the other hand, the width of the stepped inclined surface is greater than the width of the end chamfer.
[0018] On the other hand, inner circle carbon scraping edges are provided at both ends of the inner circular surface. The inner circle carbon scraping edges are arranged in a ring shape, and the size of the inner circle carbon scraping edges is consistent with the outer diameter size of the piston.
[0019] The present utility model further provides an engine, including the cylinder liner component described in any one of the above.
[0020] The cylinder liner component provided by the present utility model includes: a cylinder liner body having an inner hole for the reciprocating movement of a piston; a carbon scraping ring including a ring body and a stepped portion. The ring body is placed in the inner hole, and the stepped portion is located at one end of the ring body and surrounds the circumferential portion of the ring body. A stepped inclined surface is provided on the side of the stepped portion axially close to the ring body. Moreover, an inner circular surface and an outer circular surface are provided on the ring body. The inner circular surface is adapted to the piston, the outer circular surface is adapted to the inner hole, and the stepped surface is in chamfered mating connection with the end of the inner hole. For the cylinder liner component provided by the present utility model, by arranging the ring body of the carbon scraping ring in the inner hole of the cylinder liner body, preliminary radial limitation of the carbon scraping ring is realized. And by arranging the stepped portion on the carbon scraping ring and the stepped inclined surface on the stepped surface, and using the cooperation between the stepped inclined surface and the end chamfer of the inner hole itself, the stepped inclined surface is made to fit with the end chamfer of the inner hole itself to form an interlocking positioning, thereby realizing the final radial and axial limitation of the carbon scraping ring and the cylinder liner body. With such an arrangement, a carbon scraping ring groove does not need to be provided on the cylinder liner body or the upper part of the inner hole of the cylinder liner body that matches the carbon scraping ring, thus effectively reducing the processing flow of the cylinder liner body. At the same time, the carbon scraping ring has the advantages of short production cycle, low cost, good carbon removal effect, etc., and can effectively reduce the engine oil consumption and reduce the carbon deposition wear of the inner hole of the cylinder liner. Meanwhile, for this cylinder liner component, not only does it not need to change the structure of the cylinder liner body itself, reducing the processing cost, but it is also applicable to dry cylinder liners with relatively thin wall thickness, and has a wide application range.
[0021] The engine provided by the present utility model is provided with the above-mentioned cylinder liner component. Since the cylinder liner component has the above-mentioned technical effects, the engine provided with this cylinder liner component should also have corresponding technical effects. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or related technologies, the following will briefly introduce the drawings required for use in the description of the embodiments or related technologies. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0023] Figure 1 It is a schematic structural diagram of a specific embodiment of the cylinder liner component provided by the present utility model;
[0024] Figure 2 It is Figure 1 a schematic diagram of the matching structure between the carbon scraping ring and the cylinder liner body in the shown cylinder liner component;
[0025] Figure 3 It is Figure 1 a schematic diagram of the structure of the carbon scraping ring in the shown cylinder liner component.
[0026] Reference numerals:
[0027] Cylinder liner body 1; inner hole 11; end chamfer 12; carbon scraping ring 2; ring body 21; inner circular surface 211; outer circular surface 212; step portion 22; step inclined surface 221; transition arc groove 23; lower chamfer 24; inner circular carbon scraping edge 25. Specific embodiments
[0028] The core of the present utility model is to provide a cylinder liner component and an engine, which do not require machining of the cylinder liner and have low cost.
[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.
[0030] Please refer to Figures 1 to 3 , Figure 1 which is a schematic structural diagram of a specific embodiment of the cylinder liner component provided by the present utility model; Figure 2 For Figure 1 which is a schematic diagram of the mating structure between the carbon scraping ring and the cylinder liner body in the cylinder liner component shown; Figure 3 For Figure 1 which is a schematic diagram of the structure of the carbon scraping ring in the cylinder liner component shown.
[0031] In this embodiment, the cylinder liner component includes:
[0032] A cylinder liner body 1, provided with an inner hole 11 for the piston to reciprocate;
[0033] A carbon scraping ring 2, including a ring body 21 and a step portion 22. The ring body 21 is placed in the inner hole 11, and the step portion 22 is located at one end of the ring body 21 and surrounds the circumference of the ring body 21. A step inclined surface 221 is provided on the side of the step axially close to the ring body 21;
[0034] Moreover, the ring body 21 is provided with an inner circular surface 211 and an outer circular surface 212. The inner circular surface 211 is adapted to the piston, the outer circular surface 212 is adapted to the inner hole 11, and the step surface is cooperatively clamped with the end chamfer 12 of the inner hole 11.
[0035] Specifically, during the movement of the piston, carbon deposits will occur. The two ends of the inner circle of the ring body 21 of the carbon scraping ring 2 rub against the outer peripheral surface of the piston back and forth to scrape off the carbon deposits on the surface of the piston. The carbon scraping ring 2 is assembled in the inner hole 11 of the cylinder liner body 1 by an interference fit method to ensure the radial stability of the carbon scraping ring 2.
[0036] For the cylinder liner component provided by the present utility model, by arranging the ring body 21 of the carbon scraping ring 2 in the inner hole 11 of the cylinder liner body 1, the radial preliminary limit of the carbon scraping ring 2 is realized, and a step portion 22 is arranged on the carbon scraping ring 2, and a step inclined surface 221 is arranged on the step surface. By using the cooperation between the step inclined surface 221 and the end chamfer 12 of the inner hole 11 itself, the step inclined surface 221 is fitted with the end chamfer 12 of the inner hole 11 itself to form an interlocking positioning, so as to realize the final limit of the carbon scraping ring 2 and the cylinder liner body 1 in the radial and axial directions; with such an arrangement, there is no need to arrange a carbon scraping ring 2 groove on the upper part of the cylinder liner body 1 or the inner hole 11 of the cylinder liner body 1 that matches the carbon scraping ring 2, thereby effectively reducing the processing flow of the cylinder liner body 1. At the same time, the carbon scraping ring 2 has the advantages of short production cycle, low cost, good carbon removal effect, etc., and can effectively reduce the engine oil consumption and reduce the carbon deposition wear of the inner hole 11 of the cylinder liner. At the same time, this cylinder liner component not only does not need to change the structure of the cylinder liner body 1 itself, reducing the processing cost, but also is applicable to dry cylinder liners with relatively thin wall thicknesses, and has a wide range of applications.
[0037] In some embodiments, a transition arc groove 23 is arranged between the step inclined surface 221 and the outer circular surface 212. The transition arc groove 23 surrounds the carbon scraping ring 2 in the circumferential direction. The arc surface of the transition arc groove 23 refers to an arc surface structure along the axial direction of the outer circular surface 212. By arranging the transition arc groove 23, on the one hand, it is to reduce stress concentration, and on the other hand, it is to avoid interference between the end of the inner hole 11 of the cylinder liner body 1 and the carbon scraping ring 2 during the process of the step inclined surface 221 cooperating with the inner hole 11 of the cylinder liner body 1, and ensure that the step inclined surface 221 can form an interlocking positioning with the end chamfer 12 of the inner hole 11 of the cylinder liner body 1, and ensure the reliability of the positioning.
[0038] In some embodiments, the axial height of the carbon scraping ring 2 is 4 - 15 mm; specifically, it can be 6.5 mm, 7 mm, 8 mm, 9 mm, and preferably 8 mm. The axial height of the carbon scraping ring 2 is designed according to the height of the engine piston ring.
[0039] In some embodiments, the arc radius of the transition arc groove 23 should not be too large, which will affect the strength of the carbon scraping ring 2, nor should it be too small, which will cause interference between the carbon scraping ring 2 and the end of the inner hole 11 when the carbon scraping ring 2 is assembled into the inner hole 11 of the cylinder liner body 1, resulting in the step inclined surface 221 being unable to fit with the end chamfer 12 of the inner hole 11.
[0040] In some embodiments, the carbon scraping ring 2 is a gray cast iron carbon scraping ring 2, or a plain carbon steel carbon scraping ring 2, preferably 45 steel or HT300, which has high strength, is convenient for processing, and has low cost.
[0041] In some embodiments, the wall thickness of the ring body 21 is 1.2 - 3.5 mm; specifically, it can be 1.7 mm, 2 mm, 2.5 mm, and preferably 2 mm.
[0042] In some embodiments, the diameter of the outer circumferential surface 212 of the ring body 21 is smaller than the diameter of the inner hole 11 of the cylinder liner body 1, and it is only necessary to ensure the normal installation of the carbon scraping ring 2. The diameter of the outer circumferential surface 212 of the ring body 21 and the inner hole 11 of the cylinder liner body 1 can be as close as possible to ensure the stability of the carbon scraping ring 2.
[0043] In some embodiments, the difference between the maximum diameter of the stepped inclined surface 221 and the diameter of the outer circumferential surface 212 is 0.5 - 0.8 mm, preferably 0.6 mm, to ensure that the stepped inclined surface 221 has sufficient dimensions to cooperate well with the end chamfer 12 of the inner hole 11 of the cylinder liner body 1.
[0044] In some embodiments, the width of the stepped inclined surface 221 can be 1 - 3 mm, specifically it can be 1 mm, 1.5 mm, 1.8 mm, 2 mm, preferably 1.5 mm.
[0045] In some embodiments, a lower chamfer 24 is provided on the outer side of the end of the ring body 21 away from the stepped portion 22. When the carbon scraping ring 2 is assembled with the cylinder liner body 1, the lower chamfer 24 can play a guiding role.
[0046] In some embodiments, the axial angle of the stepped inclined surface 221 relative to the carbon scraping ring 2 is equal to the axial angle of the end chamfer 12 of the inner hole 11 relative to the inner hole 11; the axis of the carbon scraping ring 2 is parallel to the axis of the inner hole 11; by setting the slope of the stepped inclined surface 221 to be the same as the slope of the end chamfer 12, it can ensure better fitting between the stepped inclined surface 221 and the end chamfer 12, with a large contact area and large friction force, to prevent the carbon scraping ring 2 from falling off.
[0047] In some embodiments, the axial angle of the stepped inclined surface 221 relative to the carbon scraping ring 2 is smaller than the axial angle of the end chamfer 12 of the inner hole 11 relative to the inner hole 11, ensuring that the side of the stepped inclined surface 221 close to the ring body 21 contacts the end chamfer 12 of the inner hole 11 first, ensuring a good limiting effect. Moreover, for the cylinder liner body 1 with slightly deviated processing dimensions, the carbon scraping ring 2 with the same size can be used for assembly, improving the applicable range of the carbon scraping ring 2; the axis of the carbon scraping ring 2 is parallel to the axis of the inner hole 11.
[0048] In some embodiments, the angle of the stepped inclined surface 221 relative to the axis of the carbon scraping ring 2 is 30° ± 10°. The stepped inclined surface 221 squeezes with the end chamfer 12 of the inner hole 11 to reliably limit the axis of the carbon scraping ring 2; the angle of the stepped inclined surface 221 relative to the axis of the carbon scraping ring 2 can specifically be 20°, 25°, 30°, 35°, preferably 30°. The inclination angle and width of the stepped inclined surface 221 should be designed according to the end chamfer 12 of the inner hole 11 of the cylinder liner body 1.
[0049] In some embodiments, the width of the stepped inclined surface 221 is greater than the width of the end chamfer 12. With such a setting, the stepped inclined surface 221 can be fitted with the end chamfer 12 of the inner hole 11 of the cylinder liner body 1 to form an interlocking positioning, and no groove for the carbon scraping ring 2 needs to be provided in the upper part of the inner hole 11 of the cylinder liner body 1.
[0050] In some embodiments, inner carbon scraping edges 25 are provided at both ends of the inner circular surface 211. The inner carbon scraping edges 25 are arranged in a ring shape, and the inner diameter dimension of the inner carbon scraping edges 25 is adapted to the outer diameter dimension of the piston. To ensure the smooth reciprocating movement of the piston, the inner diameter dimension of the inner carbon scraping edges 25 is slightly larger than the outer diameter dimension of the piston. Specifically, the cylinder liner body 1, as a part of the engine, is inserted into the cylinder barrel of the cylinder block and jointly forms a combustion chamber with the piston and the cylinder head; by adding the carbon scraping ring 2 and using the inner carbon scraping edges 25 at both ends of the inner circular surface 211 of the carbon scraping ring 2 to scrape the carbon deposits on the piston head, the lubricating oil consumption rate of the engine is significantly reduced, and about 60% of the lubricating oil can be saved; the wear rate of the cylinder liner body 1 with the carbon scraping ring 2 and the carbon scraping ring 2 is reduced from 0.04 mm / kh of the ordinary cylinder liner to 0.015 mm / kh, improving the wear resistance of the cylinder liner body 1 and delaying the overhaul cycle by more than 1 time; the degree of pollution of the lubricating oil is significantly reduced; the crankcase pressure drops by more than 90%, and the gas leakage is greatly reduced. The total reduction value of the lubricating oil is increased by nearly 2 TBN values compared with the ordinary cylinder liner; due to its carbon scraping effect, the carbon scraping ring 2 in the cylinder liner component significantly reduces the lubricating oil consumption rate, improves the combustion performance and operating conditions of the engine, and greatly reduces the wear of the cylinder liner.
[0051] Specifically, when machining the carbon scraping ring 2 in the cylinder liner component, the steps include:
[0052] S1: Sawing the HT300 or 45 steel long tube blank to form individual blanks. The long tube can be sawn into 2 - 5 single blanks, and then stress relief annealing is carried out to complete the quenching and tempering treatment;
[0053] S2: Performing cutting machining on the inner circular surface 211 and the outer circular surface 212 of the individual blank, and cutting to form a single carbon scraping ring 2. Among them, 5 - 13 carbon scraping rings 2 can be produced from a single blank;
[0054] S3: Processing the outer circular stepped inclined surface 221 of the carbon scraping ring 2 obtained in step S2 and chamfering to obtain the finished carbon scraping ring 2.
[0055] The process flow is as follows:
[0056] Sawing → Stress relief annealing → Rough turning, cutting → Finish turning, chamfering;
[0057] For rough turning, cutting off, finish turning, and chamfering operations, a full-function CNC machine tool is used, which can achieve one-time clamping to complete the machining of the inner hole 11, outer circle, and end face, with high machining accuracy, good machining quality, and high production efficiency.
[0058] In addition to the above-mentioned cylinder liner components, the present utility model also provides an engine including the above-mentioned cylinder liner components. For the structures of other parts of the engine, please refer to the relevant technologies and will not be elaborated herein.
[0059] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other.
[0060] The above has introduced in detail the cylinder liner components provided by the present utility model. Specific examples are used herein to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only for helping to understand the method and its core idea of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and modifications can still be made to the present utility model, and these improvements and modifications also fall within the protection scope of the present utility model.
Claims
1. A cylinder liner component, characterized in that, Comprising: A cylinder liner body (1) provided with an inner hole (11) for the piston to reciprocate. A carbon scraping ring (2), including a ring body (21) and a stepped portion (22). The ring body (21) is placed in the inner hole (11), and the stepped portion (22) is located at one end of the ring body (21) and surrounds the circumferential portion of the ring body (21). A stepped inclined surface (221) is provided on the side of the step axially close to the ring body (21). Moreover, an inner circular surface (211) and an outer circular surface (212) are provided on the ring body (21). The inner circular surface (211) is adapted to the piston, and the outer circular surface (212) is adapted to the inner hole (11). The stepped surface is cooperatively clamped with the chamfer (12) at the end of the inner hole (11).
2. The cylinder liner member according to claim 1, characterized in that, A transition arc groove (23) is provided between the stepped inclined surface (221) and the outer circular surface (212), and the transition arc groove (23) surrounds the circumferential direction of the carbon scraping ring (2).
3. The cylinder liner member according to claim 2, characterized in that, The axial height of the carbon scraping ring (2) is 4 - 15 mm; the wall thickness of the ring body (21) is 1.2 - 3.5 mm, and the diameter of the outer circular surface (212) of the ring body (21) is smaller than the diameter of the inner hole (11) of the cylinder liner body (1).
4. The cylinder liner member according to claim 1, characterized in that The carbon scraping ring (2) is a gray cast iron carbon scraping ring (2) or a plain carbon steel carbon scraping ring (2).
5. The cylinder liner member according to any one of claims 1 to 4, characterized in that The axial angle of the stepped inclined surface (221) relative to the carbon scraping ring (2) is equal to the axial angle of the chamfer (12) at the end of the inner hole (11) relative to the inner hole (11); the axis of the carbon scraping ring (2) is parallel to the axis of the inner hole (11).
6. The cylinder liner member according to any one of claims 1 to 4, characterized in that, The axial angle of the stepped inclined surface (221) relative to the carbon scraping ring (2) is less than the axial angle of the chamfer (12) at the end of the inner hole (11) relative to the inner hole (11); the axis of the carbon scraping ring (2) is parallel to the axis of the inner hole (11).
7. The cylinder liner member according to claim 6, characterized in that, The angle of the stepped inclined surface (221) relative to the axis of the carbon scraping ring (2) is 30° ± 10°.
8. The cylinder liner member according to any one of claims 1 to 5, characterized in that, The width of the stepped inclined surface (221) is greater than the width of the chamfer (12).
9. The cylinder liner member according to claim 8, characterized in that, Inner circular carbon scraping edges (25) are provided at both ends of the inner circular surface (211). The inner circular carbon scraping edges (25) are arranged in a ring shape, and the inner diameter dimension of the inner circular carbon scraping edges (25) is adapted to the outer diameter dimension of the piston.
10. An engine, comprising a cylinder liner member, characterized in that, The cylinder liner component is the cylinder liner component according to any one of claims 1 to 9.