Cylinder sleeve and engine with same

Abstract

The utility model discloses an air cylinder sleeve and an engine with the air cylinder sleeve, and relates to the technical field of engine equipment, the air cylinder sleeve comprises an air cylinder sleeve body, and a valve avoiding pit is arranged at a port on one side of the air cylinder sleeve body; the carbon scraping ring is embedded in the cylinder sleeve body in a sleeved mode, a valve avoiding notch is formed in the carbon scraping ring, and a scraping blade is arranged at the end, away from the valve avoiding notch, of the carbon scraping ring.

Description

Technical Field

[0001] The utility model relates to the technical field of engine equipment, in particular to a cylinder liner and an engine with the cylinder liner. Background Art

[0002] During the operation of the engine, the valves of the intake and exhaust valves extend into the cylinder liner, opening the intake and exhaust valves to inhale fresh air and expel the burned gas. When the engine maintains high-power operation, in order to ensure sufficient combustion of the fuel and timely discharge of exhaust gas, the opening of the intake and exhaust valves increases, and the degree to which each valve extends into the cylinder liner increases. The valves will collide with the cylinder liner. At the same time, the fuel consumption during high-power operation increases, and carbon deposits will gradually form on the piston head. The carbon deposits enter between the piston and the inner wall of the cylinder liner, scratching the cylinder liner and the piston, causing damage to engine components, reducing engine power, and affecting engine life.

[0003] In summary, developing a cylinder liner that can avoid valve collision and remove piston carbon deposits is an urgent problem to be solved by those skilled in the art. Utility Model Content

[0004] The utility model aims to provide a cylinder liner and an engine with the cylinder liner, which solves the technical problems of carbon deposition on the engine piston head and collision of the valve stem with the cylinder liner.

[0005] To achieve the above object, the present invention provides a cylinder liner, comprising:

[0006] Cylinder liner body, a valve avoidance pit is provided at one side port of the cylinder liner body;

[0007] The carbon scraper ring is embedded in the cylinder sleeve body, the carbon scraper ring is provided with a valve avoidance gap, and the carbon scraper ring and one end away from the valve avoidance gap are provided with a scraping edge.

[0008] Preferably, the port of the cylinder liner body is provided with an annular groove, the annular groove and the valve avoidance pit are located on the same side, the diameter of the annular groove is larger than the diameter of the inner wall of the cylinder liner body, the annular groove extends toward the side away from the valve avoidance pit, and the annular groove forms an annular step surface on the inner wall of the cylinder liner body. The extension distance of the annular groove is the same as the height of the carbon scraper ring. The annular step surface is used to support the carbon scraper ring, and the outer wall of the carbon scraper ring is in contact with the side wall of the annular groove.

[0009] Preferably, the width of the annular step surface is smaller than the thickness of the carbon scraper ring. The carbon scraper ring is placed in the annular groove. The inner wall of the carbon scraper ring is closer to the axis of the cylinder liner body relative to the inner wall of the cylinder liner body. The inner wall of the carbon scraper ring is perpendicular to its annular end face, so that the carbon scraper ring has a scraping edge.

[0010] Preferably, the valve avoidance pit is specifically an arc-shaped groove bent toward the outer wall of the cylinder liner body. The valve avoidance pit is connected to the inner cavity of the cylinder liner body. The depth of the valve avoidance pit is less than the depth of the annular groove. The side surface of the arc-shaped groove is parallel to the axis of the cylinder liner body. The side wall of the valve avoidance pit is connected to the inner wall of the annular groove through a circular arc surface.

[0011] Preferably, there are two valve avoidance pits and two valve avoidance gaps, the valve avoidance pits and the valve avoidance gaps cooperate with each other, the side wall symmetry planes of each valve avoidance pit point to the axis of the cylinder liner body, and the angle between the symmetry planes of each valve avoidance pit is 150°.

[0012] Preferably, the carbon scraper ring is provided with a positioning hole on the side wall, and the valve avoidance gaps are symmetrically distributed on both sides of the symmetry axis. The positioning holes are located on the symmetry axis, and the positioning holes are located on the side away from the valve avoidance gaps. A positioning groove is provided on the end face of the cylinder liner body, and the positioning groove is connected with the annular groove, and the positioning groove cooperates with the positioning hole.

[0013] Preferably, a fixing member is provided in the positioning hole, and the fixing member includes a first fixing part, a connecting part and a second fixing part. The diameters of the first fixing part, the second fixing part and the connecting part decrease successively. The connecting part is located between the first fixing part and the second fixing part. The second fixing part is passed through the positioning hole, and the first fixing part is clamped into the positioning groove. The fixing member fixes the carbon scraping ring to the cylinder liner body.

[0014] Preferably, the carbon scraping ring, the annular groove and the cylinder liner body are coaxially arranged, and the width of the valve avoidance pit is greater than the width of the valve avoidance notch.

[0015] Preferably, the side wall edges of the annular groove and the carbon scraper ring that are in contact with each other are both chamfered, and the side edges of the first fixing portion and the second fixing portion close to the axis of the cylinder liner body are both chamfered.

[0016] An engine includes a cylinder liner.

[0017] Compared with the above background technology, the present invention provides a cylinder liner including: a cylinder liner body, the cylinder liner body having a cavity, a valve avoidance pit being provided at a port on one side of the cylinder liner body, the valve avoidance pit being located between the inner wall and the outer wall of the cylinder liner body and being communicated with the cavity of the cylinder liner body, the valve avoidance pit enlarging the internal space of the cylinder liner body to avoid the cylinder liner body from being hit, a carbon scraping ring is provided at one end of the cylinder liner body where the valve avoidance pit is provided, the carbon scraping ring is nested in the cavity of the cylinder liner body, and similarly, in order to avoid the carbon scraping ring from being hit, a valve avoidance notch is provided at a position corresponding to the carbon scraping ring and the valve avoidance pit, the valve avoidance pit and the valve avoidance pit are connected. The notch is connected to the cavity of the cylinder liner body, so that there is enough space for movement in the cylinder liner body to avoid the cylinder liner body from being hit. In addition, the carbon scraper ring is provided with a scraping blade on the side that extends into the cavity of the cylinder liner body. The scraping blade is arranged on the side away from the port of the cylinder liner body. The scraping blade can contact the carbon deposits produced by combustion. During the operation of the engine, the component with carbon deposits moves in the cavity of the cylinder liner body. The component passes through the carbon scraper ring during movement. The scraping blade of the carbon scraper ring scratches the surface of the component, scrapes off the carbon deposits attached to the component, and blows the scraped carbon deposits out of the cylinder liner with the exhaust stroke.

[0018] The cylinder liner provided by the utility model provides additional movement space for other components to prevent the cylinder liner from being hit. A carbon scraping ring is arranged in the cylinder liner. The scraping edge of the carbon scraping ring can scrape off carbon deposits on the components, keep the cylinder liner clean, and prevent the cylinder liner from being damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0020] Figure 1 An assembly diagram of a cylinder liner body and a carbon scraper ring provided in an embodiment of the present utility model;

[0021] Figure 2 A cross-sectional view of the cylinder liner body and carbon scraper ring assembly provided by an embodiment of the present invention;

[0022] Figure 3 A top view of the cylinder liner body and carbon scraper ring assembly provided by an embodiment of the present invention;

[0023] Figure 4 A structural diagram of a cylinder liner body provided in an embodiment of the present utility model;

[0024] Figure 5A structural diagram of a carbon scraping ring provided in an embodiment of the present utility model;

[0025] Figure 6 A structural diagram of a fixing member provided in an embodiment of the present utility model;

[0026] in:

[0027] 1- cylinder liner body; 2- valve avoidance pit; 3- carbon scraper ring; 31- valve avoidance notch; 32- scraping edge; 33- positioning hole; 4- positioning groove; 5- fixing piece; 51- first fixing part; 52- second fixing part; 53- connecting part; 6- annular groove; 7- annular step surface. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0030] Please refer to the instructions for Figure 1 To the attached Figure 6 The cylinder liner provided by the present invention includes a cylinder liner body 1, which is specifically a cylindrical cylinder. The cylinder liner body 1 has a through cavity, and a valve avoidance pit 2 is provided at a port on one side of the cylinder liner body 1. The valve avoidance pit 2 is recessed into the inner wall of the cylinder liner body 1, and the valve avoidance pit 2 is communicated with the through cavity of the cylinder liner body 1. The valve avoidance pit 2 adds additional accommodation space to the inside of the cylinder liner body 1 to prevent the cylinder liner body 1 from being hit by other components. There is a through cavity in the cylinder liner body 1, and a carbon scraping ring 3 is provided at the port on the side where the valve avoidance pit 2 is provided by a nesting manner to scrape carbon. The outer wall of the ring 3 fits with the side wall of the through cavity. In order to prevent the side wall of the carbon scraper ring 3 from separating the valve avoidance pit 2 from the cylinder liner body 1 after the scraper ring 3 is installed in the cylinder liner body 1, and forming a barrier in the extra space provided by the valve avoidance pit 2, a valve avoidance notch 31 is provided on the side wall of the carbon scraper ring 3, and the valve avoidance notch 31 is matched with the valve avoidance pit 2, so that the valve avoidance pit 2, the valve avoidance notch 31 and the cylinder liner body 1 are connected. In addition, a scraping blade 32 is provided at the end of the carbon scraper ring 3 away from the valve avoidance notch 31, and the scraping blade 32 extends into the through cavity of the cylinder liner body 1, and the scraping blade 32 is specifically annular.

[0031] When the engine load increases, the opening of the engine intake and exhaust valves increases, and the rod connected to the valve valve extends into the cylinder liner body 1 to an increasing extent. The position of the valve avoidance pit 2 corresponds to the movement path of each valve valve. The valve avoidance pit 2 and the valve avoidance notch 31 are both located at the end of the valve valve movement path. The valve avoidance pit 2 and the valve avoidance notch 31 increase the displacement margin for the valve valve. Even if the engine is under high load, the displacement distance of the valve valve stem is increased, and the valve valve can still maintain a certain safety distance from the cylinder liner body 1. The carbon scraping ring 3 inside the body 1 extends the scraping edge 32 toward the axial direction of the cylinder liner body 1. When the engine is running, the piston reciprocates in the cylinder liner body 1. When the piston moves to the top dead center, the upper end of the piston contacts the carbon scraping ring 3. The scraping edge 32 of the carbon scraping ring 3 scrapes the edge of the piston end, scraping off the carbon deposits attached to the upper end of the piston, keeping the piston and the inner wall of the cylinder liner body 1 clean, and preventing the carbon deposits from moving with the piston, damaging the piston and the inner wall of the cylinder liner body 1, reducing the air tightness of the engine combustion chamber, and affecting the engine efficiency.

[0032] The cylinder liner body 1 is also provided with an annular groove 6 at the port on the side where the valve avoidance pit 2 is provided. The side wall diameter of the annular groove 6 is larger than the inner wall diameter of the cylinder liner body 1 and is equal to the outer wall diameter of the carbon scraper ring 3. The annular groove 6 extends to the side away from the valve avoidance pit 2, and the extension depth is the same as the height of the carbon scraper ring 3. An annular step surface 7 is formed at the end of the extension of the annular groove 6, and the annular step surface 7 abuts against the end face of the carbon scraper ring 3. That is to say, after the carbon scraper ring 3 is placed in the cylinder liner body 1, the annular step surface 7 of the annular groove 6 determines the position of the carbon scraper ring 3, and the end face on the side of the valve avoidance notch 31 is provided. It is flush with the end face of the cylinder liner body 1, and the outer wall of the scraper ring 3 is in contact with the side wall of the annular groove 6. In addition, the width of the annular groove 6 is smaller than the thickness of the scraper ring 3. After the scraper ring 3 is set, the inner wall of the scraper ring 3 extends out of the inner wall of the cylinder liner body 1, and the annular end face of the scraper ring 3 is perpendicular to its side wall. The annular edge at the inner edge of the scraper ring 3 is the scraping blade 32. The scraping blade 32 is located at the top dead center of the engine. When the piston reaches the end of its movement, the scraping blade 32 contacts the upper end of the piston, and the piston slides relative to the scraping blade 32. The scraping blade 32 scrapes off the carbon deposits attached to the piston.

[0033] Please refer to the instructions for Figure 3As shown in Figure 5, since the valve valves of the engine are all circular, during the movement of the valve valve, a part of it close to the side wall of the cylinder liner body 1 will collide with the end of the cylinder liner body 1. The valve avoidance pit 2 is specifically an arc-shaped groove that can accommodate the edge of the circular valve valve and is provided at the end of the cylinder liner body 1. The side wall of the arc-shaped groove is an arc surface, which is directly connected to the inner side wall of the arc groove, connecting the arc groove with the inner cavity of the cylinder liner body 1. The arc groove extends along the axis of the cylinder liner body 1, and the extension depth is less than the depth of the annular groove 6. The side wall of the arc groove is parallel to the axis of the cylinder liner body 1. In order to connect the side wall of the arc groove with the inner wall of the annular groove 6, an arc surface is provided at the extended end of the arc groove. The valve avoidance pit 2 is a structure to prevent the valve valve from colliding with the cylinder liner body 1. Since the engine has two valves, intake and exhaust, two valve avoidance pits 2 are naturally required. Each valve avoidance pit 2 has a symmetrical surface, and the opposite side of each valve avoidance pit 2 The weighing surfaces all point to the axis of the cylinder liner body 1 and intersect at the axis to form an angle, and the angle of each symmetry plane is 150°. Similarly, there are two valve avoidance notches 31 that match the valve avoidance pit 2, and the symmetry plane angle of each valve avoidance notch 31 is 150°. The setting position of the valve avoidance pit 2 matches the movement path of each valve, and the valve avoidance pit 2 corresponds to the end point of the valve valve movement. When the valve valve increases the feed amount due to increasing the opening, the valve valve is pushed into the valve avoidance pit 2, and the edge of the valve valve can fit with the arc-shaped side wall of the valve avoidance pit 2. The part that collides with the cylinder liner body 1 is accommodated in the additional cavity of the valve avoidance pit 2. If the movement distance of the valve valve exceeds the length that the valve avoidance pit 2 can accommodate, the edge of the valve valve will abut against the arc surface at the bottom of the valve avoidance pit 2. The arc surface of the valve avoidance pit 2 makes the contact between the valve valve and the inner wall of the cylinder liner body 1 soft, thereby reducing the damage to the valve valve and the cylinder liner body 1.

[0034] Furthermore, a positioning hole 33 is provided on the carbon scraper ring 3. The positioning hole 33 is located on the symmetrical plane of the two valve avoidance notches 31, and the positioning hole 33 is located on the side away from each valve avoidance notch 31, that is, the positioning hole 33 is located on the reverse extension line of the angle bisector of the symmetrical axis of each valve avoidance notch 31. A fixing member 5 is passed through the positioning hole 33. The fixing member 5 specifically includes a first fixing portion 51, a second fixing portion 52 and a connecting portion 53, wherein the three are cylindrical and the diameters decrease successively. The connecting portion 53 is located between the first fixing portion 51 and the second fixing portion 52, and the first fixing portion 51 and the second fixing portion 52 are connected. The second connecting portion 53 is passed through the fixing hole so that the first fixing portion 51 is located outside the carbon scraper ring 3. A positioning groove 4 is provided on the annular end surface of the cylinder liner body 1. The positioning groove 4 extends to the side wall of the cylinder liner body 1, and the positioning groove 4 is connected to the inner cavity of the cylinder liner body 1. The positional relationship between the positioning groove 4 and the valve avoidance pit 2 is the same as the positional relationship between the positioning hole 33 and the valve avoidance notch 31. When the valve avoidance pit 2 and the valve avoidance notch 31 are in cooperation, the positioning hole 33 corresponds to the positioning groove 4, and the first fixing part 5 is pressed into the positioning groove 4. The scraper ring 3 is fixedly connected to the cylinder liner body 1 through the fixing part 5, and the positional relationship between the two is locked to prevent the scraper ring 3 from rotating in the cylinder liner body 1. The valve avoidance notch 31 is separated from the valve avoidance pit 2, and the side wall of the scraper ring 3 is blocked between the valve avoidance pit 2 and the inner cavity of the cylinder liner body 1. When the valve extends into the valve avoidance pit 2, it collides with the side wall of the scraper ring 3, causing damage to the engine components. Furthermore, in order to prevent the valve avoidance pit 2 and the scraper ring 3 from being affected by tolerance after fixed installation, causing the end of the valve avoidance notch 31 to extend into the valve avoidance pit 2, the width of the valve avoidance pit 2 is set to be larger than the width of the valve avoidance notch 31.

[0035] At the same time, in order to facilitate the assembly of various components of the cylinder liner, chamfers are provided on the side wall edges where the scraper ring 3 and the annular groove 6 are to be fitted, and chamfers are also provided on the side wall edges where the scraper ring 3 is fitted, so that the aperture at the end of the cylinder liner body 1 is larger than the diameter of the scraper ring 3, and has an annular inclined surface that gradually shrinks toward the axis of the cylinder liner body 1. When the scraper ring 3 is set from the port of the cylinder liner body 1, the edge of the scraper ring 3 is avoided from colliding with the port, which facilitates the installation of the scraper ring 3. Similarly, chamfers are provided on the edges of the first fixing part 51 and the second fixing part 52 near one end of the cylinder shaft. When the second fixing part 52 is inserted into the fixing hole, the chamfered inclined surface guides the second fixing part 52 to slide into the fixing hole.

[0036] The utility model also provides an engine, the cylinder liner of which has a valve avoidance pit 2 and a carbon scraper ring 3, which can avoid the intake valve from colliding with the cylinder liner when the engine increases its power, and can also remove carbon deposits on the end of the piston, avoiding the piston and the inner wall of the cylinder liner from being scratched by the carbon deposits, resulting in a decrease in the air tightness of the engine combustion chamber and a reduction in engine power.

[0037] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0038] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A cylinder liner, characterized in that: include: A cylinder liner body (1), wherein a valve avoidance pit (2) is provided at a port on one side of the cylinder liner body (1); A carbon scraping ring (3) is embedded in the cylinder liner body (1), the carbon scraping ring (3) is provided with a valve avoidance notch (31), and the carbon scraping ring (3) is provided with a scraping edge (32) at one end away from the valve avoidance notch (31).

2. The cylinder liner according to claim 1, characterized in that The port of the cylinder liner body (1) is provided with an annular groove (6), the annular groove (6) and the valve avoidance pit (2) are located on the same side, the diameter of the annular groove (6) is larger than the diameter of the inner wall of the cylinder liner body (1), the annular groove (6) extends to the side away from the valve avoidance pit (2), the annular groove (6) forms an annular step surface (7) on the inner wall of the cylinder liner body (1), the extension distance of the annular groove (6) is the same as the height of the carbon scraping ring (3), the annular step surface (7) is used to support the carbon scraping ring (3), and the outer wall of the carbon scraping ring (3) is in contact with the side wall of the annular groove (6).

3. The cylinder liner according to claim 2, characterized in that: The width of the annular step surface (7) is smaller than the thickness of the carbon scraping ring (3). The carbon scraping ring (3) is placed in the annular groove (6). The inner wall of the carbon scraping ring (3) is closer to the axis of the cylinder liner body (1) relative to the inner wall of the cylinder liner body (1). The inner wall of the carbon scraping ring (3) is perpendicular to its annular end face, so that the carbon scraping ring (3) has the scraping edge (32).

4. The cylinder liner according to claim 3, characterized in that The valve avoidance pit (2) is specifically an arc-shaped groove bent toward the outer wall of the cylinder liner body (1); the valve avoidance pit (2) is connected to the inner cavity of the cylinder liner body (1); the depth of the valve avoidance pit (2) is less than the depth of the annular groove (6); the side surface of the arc-shaped groove is parallel to the axis of the cylinder liner body (1); and the side wall of the valve avoidance pit (2) is connected to the inner wall of the annular groove (6) through an arc surface.

5. The cylinder liner according to claim 4, characterized in that: There are specifically two of each of the valve avoidance pit (2) and the valve avoidance notch (31). The valve avoidance pit (2) cooperates with the valve avoidance notch (31). The symmetrical surfaces of the side walls of each of the valve avoidance pits (2) point toward the axis of the cylinder liner body (1), and the angle between the symmetrical surfaces of each of the valve avoidance pits (2) is 150°.

6. The cylinder liner according to claim 5, characterized in that The carbon scraper ring (3) is provided with a positioning hole (33) on the side wall, and the valve avoidance notches (31) are symmetrically distributed on both sides of the symmetry axis. The positioning holes (33) are located on the symmetry axis, and the positioning holes (33) are located on the side away from the valve avoidance notches (31). A positioning groove (4) is provided on the end surface of the cylinder liner body (1), and the positioning groove (4) is communicated with the annular groove (6), and the positioning groove (4) cooperates with the positioning hole (33).

7. The cylinder liner according to claim 6, characterized in that A fixing member (5) is provided in the positioning hole (33), and the fixing member (5) includes a first fixing portion (51), a connecting portion (53), and a second fixing portion (52). The diameters of the first fixing portion (51), the second fixing portion (52), and the connecting portion (53) decrease in sequence. The connecting portion (53) is located between the first fixing portion (51) and the second fixing portion (52). The second fixing portion (52) is inserted into the positioning hole (33). The first fixing portion (51) is snap-fitted into the positioning groove (4). The fixing member (5) fixes the carbon scraping ring (3) to the cylinder liner body (1).

8. The cylinder liner according to claim 7, characterized in that The carbon scraping ring (3), the annular groove (6) and the cylinder liner body (1) are coaxially arranged, and the width of the valve avoidance pit (2) is greater than the width of the valve avoidance notch (31).

9. The cylinder liner according to claim 8, characterized in that The sidewall edges of the annular groove (6) and the carbon scraper ring (3) that are in contact with each other are both chamfered, and the side edges of the first fixing portion (51) and the second fixing portion (52) close to the axis of the cylinder liner body (1) are both chamfered.

10. An engine, characterized in that: The cylinder liner comprises the cylinder liner according to any one of claims 1 to 9.

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