Engine cylinder sleeve

Abstract

The utility model relates to an engine cylinder sleeve which is installed in a cylinder hole of an engine cylinder body and comprises a cylinder sleeve body, a lower waist belt, a middle waist belt and an upper waist belt, and the upper waist belt, the middle waist belt and the lower waist belt are sequentially arranged on the outer wall of the cylinder sleeve body at intervals in the direction away from a cylinder cover and abut against the inner wall of the cylinder hole of the cylinder body respectively. A first water jacket area is formed among the cylinder sleeve body, the lower waist belt, the middle waist belt and the inner wall of a cylinder hole of the cylinder body, a second water jacket area is formed among the cylinder sleeve body, the middle waist belt, the upper waist belt and the inner wall of the cylinder hole of the cylinder body, and the first water jacket area and the second water jacket area are communicated. And due to blocking of the middle waist belt, the water flow speed in the first water jacket area is smaller than that in the second water jacket area, the heat dissipation requirements of different parts of the cylinder sleeve body are met, heat dissipation is uniform, and deformation of the cylinder sleeve body is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to an engine cylinder sleeve. Background Art

[0002] The cylinder liner is one of the key parts of the engine. The combustion chamber formed by the cylinder liner, the piston, the cylinder head, etc. is the place where the engine explodes, and the working conditions are harsh. At present, flowing water is usually injected into the gap between the engine and the cylinder liner to cool the cylinder liner.

[0003] For example, the utility model patent with application number CN201320622701.X proposes a wet cylinder liner that can reduce carbon deposition and can deposit carbon, which includes a cylinder liner body, wherein a plurality of annular grooves that can deposit carbon are arranged at the upper end of the inner wall of the cylinder liner body; an upper belt, a middle belt and a lower belt are arranged at the upper, middle and lower parts of the outer wall of the cylinder liner body, a sealing groove is arranged on the middle belt, and a sealing ring is arranged in the sealing groove; a water trough for cooling water to pass through is formed between the upper belt and the middle belt, and between the middle belt and the lower belt; a plurality of rows and columns of spherical depressions are evenly arranged on the bottom surface of the water trough along the circumference, the height of the spherical depressions is less than the depth of the water trough, and the surface of the water trough and the surface of the spherical depressions are plated with a rust-proof and high-temperature resistant hard chromium layer.

[0004] The top of the cylinder liner, which is close to the cylinder head, is the position of the maximum stroke of the piston. The temperature at this position is the highest. During operation, the temperature of the upper part of the cylinder liner is greater than the temperature of the lower part. Water flows evenly through the cylinder liner, and zoned heat dissipation cannot be achieved. The cylinder liner is easily deformed due to uneven heat dissipation. Utility Model Content

[0005] In view of this, it is necessary to provide an engine cylinder liner to solve the problem that the temperature of the upper part of the cylinder liner is higher than the temperature of the lower part, the water flows evenly through the cylinder liner, the zoned heat dissipation cannot be achieved, and the cylinder liner is easily deformed due to uneven heat dissipation.

[0006] The utility model provides an engine cylinder liner, which is installed in the cylinder hole of the engine cylinder body, and comprises a cylinder liner body, a lower belt, a middle belt and an upper belt. Along the direction away from the cylinder head, the upper belt, the middle belt and the lower belt are sequentially arranged at intervals on the outer wall of the cylinder liner body, and respectively abut against the inner wall of the cylinder hole of the cylinder body. A first water jacket area is formed between the cylinder liner body, the lower belt, the middle belt and the inner wall of the cylinder hole of the cylinder body, and a second water jacket area is formed between the cylinder liner body, the middle belt, the upper belt and the inner wall of the cylinder hole of the cylinder body. The first water jacket area and the second water jacket area are arranged in communication.

[0007] Furthermore, the lower waist belt is clearance-matched with the cylinder hole of the cylinder body.

[0008] Furthermore, the middle waistband and the cylinder hole of the cylinder body are clearance-matched.

[0009] Furthermore, a groove connecting the first water jacket area and the second water jacket area is provided on the outer wall of the middle waistband.

[0010] Furthermore, there are multiple grooves, and the multiple grooves are evenly arranged along the circumference of the middle waistband.

[0011] Furthermore, it also includes a plurality of protrusions, which are arranged on the inner wall of the cylinder body and abut against the non-groove part of the middle waistband.

[0012] Furthermore, the angle of the groove ranges from 5 to 20 degrees.

[0013] Furthermore, the diameters of the lower waistband and the middle waistband are both smaller than that of the upper waistband.

[0014] Furthermore, the upper waist belt is transitionally matched with the cylinder hole of the cylinder body.

[0015] Furthermore, a water inlet and a water outlet connected to the second water jacket area are provided on the cylinder body, and the water inlet and the water outlet are respectively arranged on both sides of the cylinder liner body. The water flow velocity in the second water jacket area is greater than the water flow velocity in the first water jacket area through the obstruction of the middle belt.

[0016] Compared with the prior art, through the first water jacket area and the second water jacket area formed between the cylinder liner body, the lower waistband, the middle waistband and the upper waistband and the inner wall of the cylinder hole of the cylinder body, the heat dissipation demand of the part of the cylinder liner body corresponding to the first water jacket area is lower than the heat dissipation demand of the part of the cylinder liner body corresponding to the second water jacket area. For this reason, flowing water can be introduced into the second water jacket area and discharged from the second water jacket area. At the same time, the water flows into the second water jacket area through the first water jacket area. Due to the obstruction of the middle waistband, the water flow velocity in the first water jacket area is lower than the water flow velocity in the second water jacket area, which is adapted to the heat dissipation requirements of different parts of the cylinder liner body, dissipates heat evenly, and avoids deformation of the cylinder liner body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the overall structure of an engine cylinder liner provided by an embodiment of the utility model;

[0018] Figure 2 A schematic diagram of the structure of a cylinder liner body of an engine cylinder liner provided by an embodiment of the utility model being installed in a cylinder hole of a cylinder block;

[0019] Figure 3 The engine cylinder liner provided by the embodiment of the utility model Figure 2 The enlarged schematic diagram of the middle A part;

[0020] Figure 4 A schematic diagram of the structure of the middle belt in the cylinder liner of the engine provided by the embodiment of the utility model matching with the protrusion in the cylinder hole of the cylinder body;

[0021] Figure 5 A schematic diagram of the arrangement of positioning ports in an engine cylinder liner provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0023] like Figure 1 As shown, an engine cylinder liner provided by the utility model is installed in the cylinder hole of the engine cylinder block M, including a cylinder liner body 100, a lower belt 200, a middle belt 300 and an upper belt 400. Along the direction away from the cylinder head, the upper belt 400, the middle belt 300 and the lower belt 200 are sequentially spaced at the outer wall of the cylinder liner body 100, and respectively abut against the inner wall of the cylinder hole of the cylinder block M. A first water jacket area 110 is formed between the cylinder liner body 100, the lower belt 200, the middle belt 300 and the inner wall of the cylinder hole of the cylinder block M. A second water jacket area 120 is formed between the cylinder liner body 100, the middle belt 300, the upper belt 400 and the inner wall of the cylinder hole of the cylinder block M. The first water jacket area 110 and the second water jacket area 120 are connected and arranged.

[0024] During implementation, through the first water jacket area 110 and the second water jacket area 120 formed between the cylinder liner body 100, the lower belt 200, the middle belt 300 and the upper belt 400 and the inner wall of the cylinder hole of the cylinder body M, the heat dissipation demand of the part of the cylinder liner body 100 corresponding to the first water jacket area 110 is lower than the heat dissipation demand of the part of the cylinder liner body 100 corresponding to the second water jacket area 120. For this reason, flowing water can be introduced into the second water jacket area 120 and discharged from the second water jacket area 120. At the same time, the water flows into the second water jacket area 120 through the first water jacket area 110. Due to the obstruction of the middle belt 300, the water flow velocity in the first water jacket area 110 is lower than the water flow velocity in the second water jacket area 120, which is adapted to the heat dissipation requirements of different parts of the cylinder liner body 100, and the heat dissipation is uniform, thereby avoiding deformation of the cylinder liner body 100.

[0025] The outer wall of the cylinder liner body 100 in this embodiment is provided with a lower belt 200, a middle belt 300 and an upper belt 400, wherein the above-mentioned belts can improve the deformation resistance of the cylinder liner body 100, and prevent the cylinder liner body 100 from excessive deformation due to stress and heat. At the same time, a first water jacket area 110 is formed between the cylinder liner body 100, the lower belt 200, the middle belt 300 and the inner wall of the cylinder bore of the cylinder body M, and a second water jacket area 120 is formed between the cylinder liner body 100, the middle belt 300, the upper belt 400 and the inner wall of the cylinder bore of the cylinder body M. The first water jacket area 110 and the second water jacket area 120 are connected and arranged, and flowing water can be injected into the first water jacket area 110 and the second water jacket area 120 to achieve the cooling and heat dissipation function of the cylinder liner body 100.

[0026] In one embodiment, the lower waist belt 200 and the cylinder hole of the cylinder body M are clearance-fitted.

[0027] In one embodiment, the middle belt 300 and the cylinder bore of the cylinder body M are clearance-fitted.

[0028] like Figure 2-3 As shown, in order to achieve the connection between the first water jacket area 110 and the second water jacket area 120, in one embodiment, a groove 310 is provided at the outer wall of the middle waistband 300 to connect the first water jacket area 110 and the second water jacket area 120. It can be understood that the shape of the groove 310 is not limited, and can be rectangular or circular. At the same time, the middle waistband 300 can be formed by casting the groove and then processing it to a specified diameter.

[0029] There are multiple grooves 310 , and the multiple grooves 310 are evenly arranged along the circumference of the middle waistband 300 .

[0030] like Figure 4 As shown, in one embodiment, it further includes a plurality of protrusions M1 , which are disposed on the inner wall of the cylinder M and abut against the non-groove 310 of the middle waistband 300 .

[0031] In one embodiment, the angle range of the groove 310 is 5-20 degrees. Of course, in other embodiments, the angle range of the groove 310 can also be 12 degrees, 14 degrees, etc., which is not limited in the embodiment of the utility model and is determined according to the size of the cylinder liner body 100.

[0032] In order to facilitate the lower waist belt 200 and the middle waist belt 300 to be stably placed in the cylinder hole of the cylinder body M and the position locking between the cylinder body M body and the cylinder hole of the cylinder body M, in one embodiment, the diameters of the lower waist belt 200 and the middle waist belt 300 are both smaller than the upper waist belt 400, wherein the upper waist belt 400 and the cylinder hole of the cylinder body M are transitionally matched.

[0033] like Figure 5As shown, in order to facilitate determination of the circumferential installation position of the cylinder liner body 100 , in one embodiment, a positioning opening 130 may be opened at the top edge of the cylinder liner body 100 .

[0034] In one embodiment, a water inlet and a water outlet connected to the second water jacket area 120 are provided on the cylinder body M, and the water inlet and the water outlet are respectively arranged on both sides of the cylinder liner body 100. The water flow velocity in the second water jacket area 120 is greater than the water flow velocity in the first water jacket area 110 through the obstruction of the middle belt 300.

[0035] Compared with the prior art: through the first water jacket area 110 and the second water jacket area 120 formed between the cylinder liner body 100, the lower belt 200, the middle belt 300 and the upper belt 400 and the inner wall of the cylinder hole of the cylinder body M, the heat dissipation demand of the part of the cylinder liner body 100 corresponding to the first water jacket area 110 is lower than the heat dissipation demand of the part of the cylinder liner body 100 corresponding to the second water jacket area 120. For this reason, flowing water can be introduced into the second water jacket area 120 and discharged from the second water jacket area 120. At the same time, the water flows into the second water jacket area 120 through the first water jacket area 110. Due to the obstruction of the middle belt 300, the water flow velocity in the first water jacket area 110 is lower than the water flow velocity in the second water jacket area 120, which is adapted to the heat dissipation requirements of different parts of the cylinder liner body 100, the heat dissipation is uniform, and the cylinder liner body 100 is prevented from deformation.

[0036] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. An engine cylinder liner installed in the cylinder hole of the engine cylinder block, It is characterized in that It includes a cylinder liner body, a lower belt, a middle belt and an upper belt; Along the direction away from the cylinder head, the upper belt, the middle belt and the lower belt are sequentially arranged at intervals on the outer wall of the cylinder liner body and respectively abut against the inner wall of the cylinder hole of the cylinder body; A first water jacket area is formed between the cylinder liner body, the lower belt, the middle belt and the inner wall of the cylinder bore of the cylinder body, and a second water jacket area is formed between the cylinder liner body, the middle belt, the upper belt and the inner wall of the cylinder bore of the cylinder body. The first water jacket area and the second water jacket area are arranged in communication.

2. The engine cylinder liner according to claim 1, It is characterized in that The lower waist belt is clearance-matched with the cylinder hole of the cylinder body.

3. The engine cylinder liner according to claim 1, It is characterized in that The middle waistband is clearance-matched with the cylinder hole of the cylinder body.

4. The engine cylinder liner according to claim 1, It is characterized in that A groove connecting the first water jacket area and the second water jacket area is arranged on the outer wall of the middle waistband.

5. The engine cylinder liner according to claim 4, It is characterized in that The number of the grooves is multiple, and the multiple grooves are evenly arranged along the circumference of the middle waistband.

6. The engine cylinder liner according to claim 4, It is characterized in that It also includes a plurality of protrusions, which are arranged on the inner wall of the cylinder body and abut against the non-groove portion of the middle waistband.

7. The engine cylinder liner according to claim 4, It is characterized in that The angle of the groove is in the range of 5-20 degrees.

8. The engine cylinder liner according to claim 1, It is characterized in that The diameters of the lower waistband and the middle waistband are both smaller than the upper waistband.

9. The engine cylinder liner according to claim 1, It is characterized in that The upper belt is transitionally matched with the cylinder hole of the cylinder body.

10. The engine cylinder liner according to claim 1, It is characterized in that A water inlet and a water outlet connected to the second water jacket area are provided on the cylinder body. The water inlet and the water outlet are respectively arranged on both sides of the cylinder liner body. The water flow velocity in the second water jacket area is greater than the water flow velocity in the first water jacket area through the obstruction of the middle belt.

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