CN212154959U

CN212154959U - Wet cylinder sleeve of engine

Info

Publication number: CN212154959U
Application number: CN202020728898.5U
Authority: CN
Inventors: 费运嘉; 彭庆永; 郑泽; 魏顺冬
Original assignee: Anhui Hualing Automobile Co Ltd
Current assignee: Anhui Hanma Engine Co ltd
Priority date: 2020-05-06
Filing date: 2020-05-06
Publication date: 2020-12-15
Anticipated expiration: 2030-05-06

Abstract

The utility model discloses an engine wet cylinder liner belongs to engine cylinder liner technical field. The utility model discloses well cylinder liner top surface has the flame shoulder of a take the altitude, can reduce gas direct contact cylinder gasket, prevents the cylinder gasket ablation, can improve the stress distribution who supports the shoulder simultaneously, makes cylinder gasket packing force and holding power at same axis, reduces the cylinder liner and supports the cracked risk of shoulder, still strengthens its sealing capacity.

Description

Wet cylinder sleeve of engine

Technical Field

The utility model relates to a technical field of engine cylinder liner especially relates to a wet-type cylinder liner of engine for avoiding flame direct contact cylinder gasket in the combustion chamber to cause whole leakproofness to reduce.

Background

The engine bore liner is one of the most prominent, load-bearing, most complex components in the engine. The inner surface of the cylinder sleeve is directly acted by high-temperature and high-pressure fuel gas and always generates high-speed sliding friction with a piston ring and a piston skirt. The outer surface is contacted with cooling water, and severe thermal stress is generated under a large temperature difference and is corroded by the cooling water. And the side thrust of the piston against the cylinder liner not only aggravates the inner surface friction thereof, but also bends the same. The piston also impacts the cylinder liner as the side thrust changes direction. In addition, a larger pressing force of the cylinder head bolt is received.

The wet cylinder sleeve is characterized in that the outer wall of the cylinder sleeve is directly contacted with cooling liquid. The wall thickness of a wet cylinder liner cast from alloy cast iron is generally 5-10 mm. The wet cylinder sleeve is positioned by utilizing the clearance fit formed between the upper and lower positioning ring belts on the outer wall of the cylinder sleeve and the corresponding part of the cylinder body to realize radial positioning; and the axial positioning is generally realized by the supporting surface of the upper supporting shoulder of the cylinder sleeve corresponding to the top surface of the cylinder body. The lower part of the wet cylinder sleeve is sealed by 2-3 heat-resistant and oil-resistant rubber sealing rings to prevent the leakage of cooling liquid; the upper part of the cylinder cover is sealed by utilizing the fact that after the cylinder sleeve is arranged in the cylinder body, the top surface of the cylinder sleeve is 0.05-0.15mm higher than the top surface of the cylinder body, therefore, when a bolt of the cylinder cover is screwed down, most of compression force acts on a supporting shoulder of the cylinder sleeve, a sealing gasket of the cylinder cover is tightly attached to the supporting surface of the cylinder body, and water leakage in the cylinder and water leakage of a water jacket are prevented.

The existing wet cylinder sleeve of the engine has the following common problems: the upper end face of the cylinder sleeve is not provided with a structure for protecting flame, high-temperature and high-pressure fuel gas directly contacts the cylinder gasket through a gap between the upper end face of the cylinder sleeve and the lower plane of the cylinder cover, the cylinder gasket is easy to burn and damage, the sealing of a combustion chamber cannot be guaranteed for a long time, and finally air leakage of the cylinder and water leakage of the water jacket are caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the prior art in not enough, so provide an engine wet cylinder liner, utilize the flame of keeping off convex shoulder to effectively protect its cylinder pad by the gas damage, improve its life greatly, and then can promote the life of its engine.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the wet cylinder sleeve of the engine is characterized in that a flame blocking convex shoulder is arranged on the top surface of the cylinder sleeve.

Furthermore, the height of the flame-blocking shoulder is 0.01-0.10 mm.

Furthermore, the height of the flame-blocking shoulder is 0.01-0.08 mm.

Furthermore, the height of the flame-blocking shoulder is 0.02-0.08 mm.

Furthermore, the flame blocking convex shoulder and the cylinder sleeve are coaxially arranged, and the width of the flame blocking convex shoulder is smaller than or equal to the wall thickness of the cylinder sleeve, so that the pressing force of the cylinder head gasket and the supporting force of the cylinder body are on the same axis.

Furthermore, the cylinder sleeve is provided with a lower end face of a support shoulder matched with the cylinder body, and an included angle of 10 '-30' is formed between the lower end face of the support shoulder and the support shoulder of the cylinder body.

Furthermore, an included angle of 12 '-30' is formed between the lower end face of the supporting shoulder and the supporting shoulder of the cylinder body.

Furthermore, an included angle of 12 '-25' is formed between the lower end face of the supporting shoulder and the supporting shoulder of the cylinder body.

Compared with the prior art, the utility model discloses possess following beneficial effect:

the utility model discloses well cylinder liner top surface has the flame shoulder of a take the altitude, can reduce gas direct contact cylinder gasket, prevents the cylinder gasket ablation, can improve the stress distribution who supports the shoulder simultaneously, makes cylinder gasket packing force and holding power at same axis, reduces the cylinder liner and supports the cracked risk of shoulder, still strengthens its sealing capacity. The lower end face of the improved supporting shoulder matched with the cylinder body is arranged at a certain included angle with the supporting face shoulder of the cylinder body, so that when the cylinder sleeve bears explosive force and the pressing force of a cylinder cover bolt, the stress is more reasonable, the stress at the round corner of the supporting shoulder is effectively reduced, and the risk of fracture of the supporting shoulder is further reduced.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a partially enlarged view of a portion a in fig. 1.

In the figure: 1. a cylinder liner; 2. a flame blocking convex shoulder; 3. the lower end surface of the supporting shoulder.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Examples

As shown in figures 1 and 2, the wet cylinder sleeve of the engine is characterized in that a flame blocking shoulder is arranged on the top surface of the cylinder sleeve, the height of the flame blocking shoulder 2 is 0.01-0.10mm, the preferred height is 0.02-0.06mm, the best effect is selected to be 0.05mm, the preferred flame blocking shoulder 2 is arranged coaxially with the cylinder sleeve, the width of the flame blocking shoulder 2 is slightly smaller than the wall thickness (within 1 mm) of the cylinder sleeve 1, gas can be reduced from directly contacting the cylinder liner, ablation of the cylinder liner is prevented, meanwhile, the stress distribution of a supporting shoulder can be improved, the pressing force and the supporting force of the cylinder liner are on the same axis, the risk of breakage of the supporting shoulder of the cylinder sleeve is reduced, and the sealing capability.

Further, the cylinder sleeve 1 is provided with a supporting shoulder lower end face 3 matched with the cylinder body, an included angle of 10 ' -30 ' is formed between the supporting shoulder lower end face 3 and the cylinder body supporting shoulder, an included angle of 12 ' -25 ' is formed between the preferable supporting shoulder lower end face and the cylinder body supporting shoulder, the selected included angle is 20 ' with the best effect, a certain included angle is formed between the improved supporting shoulder lower end face 3 matched with the cylinder body and the cylinder body supporting shoulder, when the cylinder sleeve 1 bears explosive force and cylinder cover bolt pressing force, the stress is more reasonable, the stress at the supporting shoulder fillet is effectively reduced, and further the risk of fracture of the supporting shoulder is reduced.

The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto. The substitution may be of partial structures, devices, method steps, or may be a complete solution. According to the technical scheme of the utility model and utility model thereof think of and equal replacement or change, all should cover within the scope of protection of the utility model.

Claims

1. The wet cylinder sleeve for the engine is characterized in that a flame blocking convex shoulder (2) is arranged on the top surface of the cylinder sleeve (1), the flame blocking convex shoulder (2) and the cylinder sleeve (1) are coaxially arranged, and the width of the flame blocking convex shoulder (2) is smaller than or equal to the wall thickness of the cylinder sleeve (1).

2. An engine wet cylinder liner according to claim 1, characterized in that the height of the flame stop shoulder (2) is 0.01-0.10 mm.

3. An engine wet cylinder liner as claimed in claim 2, characterized in that the height of the flame trap shoulder (2) is 0.01-0.08 mm.

4. An engine wet cylinder liner as claimed in claim 3, characterized in that the height of the flame trap shoulder (2) is 0.02-0.08 mm.

5. The wet cylinder liner of an engine according to claim 1, characterized in that the cylinder liner (1) is provided with a lower end surface (3) of a support shoulder which is matched with a cylinder body, and an included angle of 10 '-30' is formed between the lower end surface (3) of the support shoulder and the support shoulder of the cylinder body.

6. The wet cylinder liner of an engine according to claim 5, wherein an included angle of 12 '-30' is provided between the lower end surface (3) of the support shoulder and the support shoulder of the cylinder block.

7. The wet cylinder liner of an engine according to claim 6, wherein an included angle of 12 '-25' is provided between the lower end surface (3) of the support shoulder and the support shoulder of the cylinder block.