CN219529153U

CN219529153U - Cylinder sleeve structure capable of cleaning carbon deposit

Info

Publication number: CN219529153U
Application number: CN202320489024.2U
Authority: CN
Inventors: 史长平; 邓刚; 杨刚
Original assignee: Weichai Heavy Machinery Co Ltd; Chongqing Weichai Engine Co Ltd
Current assignee: Weichai Heavy Machinery Co Ltd; Chongqing Weichai Engine Co Ltd
Priority date: 2023-03-13
Filing date: 2023-03-13
Publication date: 2023-08-15
Anticipated expiration: 2033-03-13

Abstract

The utility model discloses a cylinder sleeve structure capable of cleaning carbon deposition, which comprises: the cylinder sleeve is internally provided with a piston, the piston is provided with a piston ring and an oil ring, the oil ring is positioned below the piston ring, the upper part of the inner surface of the cylinder sleeve is provided with a carbon containing groove, and both ends of the carbon containing groove are provided with carbon scraping cutting edges. When the piston burns and does the power stroke, the piston descends, carbon deposition generated by incomplete combustion of the piston head ring bank is scraped through the carbon scraping cutting edge of the carbon containing groove, the scraped carbon deposition is temporarily stored in the carbon containing groove, and is discharged during the subsequent exhaust stroke, so that the carbon deposition of the piston ring bank is reduced, and meanwhile, the surface of the cylinder sleeve is clean, and the pull injury and abrasion of the cylinder sleeve, the piston ring and the piston caused by the scraped carbon deposition are prevented.

Description

Cylinder sleeve structure capable of cleaning carbon deposit

Technical Field

The utility model relates to the technical field of diesel engines, in particular to a cylinder sleeve structure capable of cleaning carbon deposition.

Background

In marine engines, heavy diesel oil and heavy oil are generally used in consideration of fuel price factors, and because the heavy diesel oil and heavy oil contain sulfur, ash and particulate matters and have larger specific gravity, the lubrication state of cylinder liners and piston rings is poor, carbon deposition on the heads of the pistons is more, and the early abrasion problem of the pistons, the cylinder liners and the piston rings is prominent.

Disclosure of Invention

Aiming at the defects, the technical problems to be solved by the utility model are as follows: a cylinder liner structure capable of cleaning carbon deposition is provided to delay abrasion of a piston, a cylinder liner and a piston ring.

In order to solve the technical problems, the technical scheme of the utility model is as follows:

a cylinder liner structure capable of cleaning carbon deposition, comprising: the cylinder sleeve is internally provided with a piston, the piston is provided with a piston ring and an oil ring, the oil ring is positioned below the piston ring, the upper part of the inner surface of the cylinder sleeve is provided with a carbon containing groove, and both ends of the carbon containing groove are provided with carbon scraping cutting edges.

Preferably, when the piston is positioned at the top dead center, the lower end edge of the carbon scraping cutting edge is flush with or higher than the upper edge of the piston ring with the highest position.

Preferably, the fillet transition between the two ends of the carbon containing groove and the inner surface of the cylinder sleeve forms the carbon scraping cutting edge.

Preferably, the carbon containing groove is arc-shaped and comprises a main body arc section and round corner transition sections positioned at two ends of the main body arc section, and an included angle between a tangent line at a joint point of the round corner transition sections and the inner surface of the cylinder sleeve is more than or equal to 9 degrees and less than or equal to 10 degrees.

Preferably, the depth of the carbon containing groove is T1, t1= (0.8-1.2) mm, the width is T2, t2= (12-18) mm, the radius is Rx, and rx= (15-20) mm.

Preferably, a plurality of oil storage tanks are circumferentially and uniformly distributed at the lower part of the cylinder sleeve.

Preferably, when the piston is located at the bottom dead center, the upper end of the oil storage tank is flush with or lower than the lower edge of the piston ring with the highest position, and the upper end of the oil storage tank is higher than the upper edge of the piston ring with the second highest position, and the lower end of the oil storage tank is lower than the upper edge of the oil ring.

Preferably, when the piston is at the bottom dead center, the lower end of the oil reservoir is lower than the lower edge of the oil ring.

Preferably, the oil storage tank is in a circular arc shape, and the two ends of the oil storage tank are in rounded transition with the inner surface of the cylinder sleeve.

Preferably, the depth of the oil storage tank is T3, t3= (2-3) mm, the radius of the oil storage tank is Ry, ry= (3-5) mm, and the radius of the transitional arc between the two ends of the oil storage tank and the inner surface of the cylinder sleeve is Rz, rz= (2-3) mm.

After the technical scheme is adopted, the utility model has the beneficial effects that:

according to the utility model, the carbon containing groove is arranged at the upper part of the cylinder sleeve, the carbon scraping cutting edges are arranged at the edges of the two ends of the carbon containing groove, when the piston burns and does work, and the piston descends, carbon deposit generated by incomplete combustion of the ring land of the head part of the piston is scraped through the carbon scraping cutting edges of the carbon containing groove, the scraped carbon deposit is temporarily stored in the carbon containing groove, and is discharged in the subsequent exhaust stroke, so that carbon deposit on the ring land of the piston is reduced, and meanwhile, the surface of the cylinder sleeve is clean, and the cylinder sleeve, the piston ring and the piston are prevented from being damaged and worn due to the scraped carbon deposit.

Drawings

FIG. 1 is a schematic cross-sectional view of a cylinder liner structure of the present utility model (piston at top dead center) for removing soot;

FIG. 2 is a schematic cross-sectional view of a cylinder liner structure of the present utility model (piston at bottom dead center) for removing soot;

FIG. 3 is a schematic view of the position of the carbon containing groove and piston ring of FIG. 1 when the piston is at top dead center;

FIG. 4 is an enlarged schematic view of the carbon tank in FIG. 3;

FIG. 5 is a schematic top view of the cylinder liner;

FIG. 6 is an enlarged schematic view of the portion A in FIG. 5;

in the figure: 1. cylinder sleeve; 11. a carbon containing groove; 12. a carbon scraping cutting edge; 13. an oil storage tank; 2. a piston; 3. piston rings; 4. oil ring.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

As shown in fig. 1-4, a cylinder liner structure capable of cleaning carbon deposition includes: the cylinder sleeve 1 is internally provided with a piston 2, the piston 2 is provided with a piston ring 3 and an oil ring 4, the oil ring 4 is positioned below the piston ring 3, the upper part of the inner surface of the cylinder sleeve 1 is provided with a carbon containing groove 11, and both ends of the carbon containing groove 11 are provided with carbon scraping cutting edges 12. In the illustrated embodiment, the piston ring 3 is provided with three rings, namely a first piston ring, a second piston ring and a third piston ring, in sequence from top to bottom, and the oil ring 4 is positioned below the third piston ring.

When the piston 2 burns and does the power stroke, and the piston 2 descends, carbon deposition generated by incomplete combustion of the head ring bank of the piston 2 is scraped through the carbon scraping cutting edge 12 of the carbon containing groove 11, the scraped carbon deposition is temporarily stored in the carbon containing groove 11, is discharged in the subsequent exhaust stroke, the carbon deposition of the piston ring bank is reduced, the surface of the cylinder sleeve 1 is clean, and the damage to the cylinder sleeve 1, the piston ring 3 and the piston 2 caused by the scraped carbon deposition is prevented.

Preferably, when the piston 2 is positioned at the top dead center, the lower end edge of the lower carbon scraping edge 12 is flush with or higher than the upper edge of the piston one ring, so that the carbon containing groove 11 is prevented from being communicated with the annular groove for containing the piston one ring, and engine oil stored in the piston one ring enters the carbon containing groove 11 and is burnt in the power stroke.

Preferably, the rounded corners between the two ends of the carbon containing groove 11 and the inner surface of the cylinder sleeve 1 form a carbon scraping cutting edge 12. In the illustrated embodiment, the carbon containing groove 11 is arc-shaped, and comprises a main body arc section and round corner transition sections positioned at two ends of the main body arc section, wherein an included angle between a tangent line at a joint point of the round corner transition sections and the inner surface of the cylinder sleeve 1 is phi, phi is more than or equal to 9 degrees and less than or equal to 10 degrees, and the smooth transition is performed, so that the snap ring phenomenon is prevented when the piston 2 is hoisted or disassembled. The depth of the carbon containing groove 11 is T1, T1= (0.8-1.2) mm, the width is T2, T2= (12-18) mm, the radius is Rx, rx= (15-20) mm, and the strength of the cylinder sleeve 1 is prevented from being excessively weakened.

As shown in fig. 2, 5 and 6 together, a plurality of oil storage tanks 13 are circumferentially and uniformly distributed at the lower part of the cylinder sleeve 1, when the piston 2 is positioned at the bottom dead center, the upper ends of the oil storage tanks 13 are flush or lower than the lower edge of the first ring of the piston, the upper ends of the oil storage tanks 13 are higher than the upper edge of the second ring of the piston, the annular groove for accommodating the first ring of the piston is prevented from being communicated with the oil storage tanks 13, excessive loss is formed when oil gas upwards flows into the cylinder, and the lower ends of the oil storage tanks 13 are lower than the upper edge of the oil ring 4. When the piston 2 is positioned at the bottom dead center, the oil storage groove 13 is respectively communicated with the annular groove for accommodating the piston two rings, the piston three rings and the oil ring 4, the lubricating oil in the oil storage groove 13 is fully stored between the piston two rings and the oil ring 4, then the piston 2 moves upwards, and the stored lubricating oil is distributed through the piston 2 and the oil ring 4, so that the lubrication condition in a cylinder is improved, the abrasion of the piston 2, the piston ring 3 and the cylinder sleeve 1 is reduced, and the service life of the piston is prolonged.

Further, the lower end of the oil reservoir 13 is lower than the lower edge of the oil ring 4 so that the ring groove accommodating the oil ring 4 can sufficiently store oil.

The oil storage tank 13 is circular arc, and the fillet transition between the both ends of oil storage tank 13 and the internal surface of cylinder liner 1 disperses the stress, and the radius of fillet transition is Rz, rz= (2-3) mm.

The depth of the oil storage groove 13 is T3, T3= (2-3) mm, the radius of the oil storage groove is Ry, ry= (3-5) mm, and the strength of the cylinder sleeve 1 is prevented from being weakened while the oil storage requirement is met.

The foregoing is illustrative of the best mode of carrying out the utility model, and is not presented in any detail as is known to those of ordinary skill in the art. The protection scope of the utility model is defined by the claims, and any equivalent transformation based on the technical teaching of the utility model is also within the protection scope of the utility model.

Claims

1. A cylinder liner structure capable of cleaning carbon deposition, comprising: the cylinder sleeve is internally provided with a piston, the piston is provided with a piston ring and an oil ring, and the oil ring is positioned below the piston ring.

2. The cylinder liner structure of claim 1, wherein the lower edge of the carbon scraping edge is flush with or higher than the upper edge of the piston ring with the highest position when the piston is positioned at the top dead center.

3. The cleanable carbon deposit liner structure of claim 1, wherein rounded transitions between ends of the carbon pocket and the liner inner surface form the carbon scraping edge.

4. The cylinder sleeve structure capable of cleaning carbon deposit according to claim 3, characterized in that the carbon containing groove is in a circular arc shape and comprises a main body circular arc section and round corner transition sections positioned at two ends of the main body circular arc section, wherein an included angle between a tangent line at a joint point of the round corner transition sections and the inner surface of the cylinder sleeve is phi, and phi is more than or equal to 9 degrees and less than or equal to 10 degrees.

5. The cylinder sleeve structure capable of cleaning carbon deposition as claimed in claim 1, wherein the depth of the carbon containing groove is T1, t1= (0.8-1.2) mm, the width is T2, t2= (12-18) mm, and the radius is Rx, rx= (15-20) mm.

6. The cylinder liner structure capable of cleaning carbon deposition as recited in claim 1, wherein a plurality of oil storage tanks are circumferentially and uniformly distributed at the lower part of the cylinder liner.

7. The soot cleanable cylinder liner structure of claim 6, wherein the upper end of the oil reservoir is flush with or below the lower edge of the highest positioned piston ring when the piston is at bottom dead center, and the upper end of the oil reservoir is above the upper edge of the second highest positioned piston ring, and the lower end of the oil reservoir is below the upper edge of the oil ring.

8. The soot cleanable cylinder liner structure of claim 7, wherein the lower end of the oil reservoir is below the lower edge of the oil ring when the piston is at bottom dead center.

9. The soot cleanable cylinder liner structure of claim 6, wherein said oil reservoir is circular in shape and has rounded transitions between ends of said oil reservoir and an inner surface of said cylinder liner.

10. The cylinder liner structure capable of cleaning carbon deposition as claimed in claim 9, wherein the depth of the oil storage tank is T3, t3= (2-3) mm, the radius of the oil storage tank is Ry, ry= (3-5) mm, and the radius of the transition arc between the two ends of the oil storage tank and the inner surface of the cylinder liner is Rz, rz= (2-3) mm.