CN209818176U - Wet cylinder sleeve for ship low-speed diesel engine - Google Patents
Wet cylinder sleeve for ship low-speed diesel engine Download PDFInfo
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- CN209818176U CN209818176U CN201920640394.5U CN201920640394U CN209818176U CN 209818176 U CN209818176 U CN 209818176U CN 201920640394 U CN201920640394 U CN 201920640394U CN 209818176 U CN209818176 U CN 209818176U
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- cylinder liner
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- diesel engine
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Abstract
An object of the utility model is to provide a wet cylinder jacket for boats and ships low-speed diesel engine, including the cylinder liner body, the cylinder liner body is installed in the cylinder hole of organism, the top setting of the cylinder liner body is shouldered along radial outstanding support, cylinder liner body middle part sets up the tourus, the lower part of the cylinder liner body sets up the round along circumference and sweeps the gas pocket, the cylinder hole upper surface sets up the step, support the axial fixity that the shoulder cooperatees with the step and realizes the cylinder liner body, the tourus contacts the radial fixity that realizes the cylinder liner body with the organism inner wall, support the shoulder, the tourus forms the cooling chamber with the organism wall, set up the water inlet channel of intercommunication cooling chamber import and the play water channel of intercommunication. The utility model discloses the cylinder can obtain good cooling, satisfies the heat dissipation demand of engine under higher load, guarantees that the engine can be high-efficient, the reliable operation for a long time.
Description
Technical Field
The utility model relates to a diesel engine, specifically speaking are diesel engine cylinder jacket.
Background
The diesel engine is a piston type internal combustion engine, and is a very important power machine in the life and production of modern society. The diesel engine has the advantages of high thermal efficiency, wide power and rotating speed range, good maneuverability and the like, and is widely applied to various industrial and living fields. In the field of ship power, a diesel engine is irreplaceable, wherein a marine low-speed two-stroke diesel engine is mainly used as a power system of a large ship.
The cylinder sleeve is a very important part in the diesel engine, is placed in a cylinder hole of a machine body, and forms a working space of the diesel engine together with a cylinder cover, so that a piston can do stable reciprocating linear motion in the working space, and then the reciprocating linear motion of the piston is changed into the rotation of a crankshaft through a connecting rod crankshaft structure, and effective work is output outwards.
Because the combustion of fuel and the friction of piston and cylinder inner wall, the cylinder liner can absorb a large amount of heats in the course of the work, if can not in time go out the heat transfer, the temperature of cylinder liner can continuously rise, causes piston ring sintering easily, the rapid bad consequence such as wearing and tearing of cylinder liner, influences the normal operating of engine, reduces the life-span of engine. For a marine low speed diesel engine with a longer stroke, the upper part of the cylinder liner absorbs more heat, so the temperature of the upper part of the cylinder liner is higher compared with the lower part, especially the top part of the cylinder liner absorbs a large amount of heat during the heat release process of the fuel combustion. Therefore, whether the upper portion of the cylinder liner can be cooled well is important for stable and efficient operation of the diesel engine.
The cylinder liner is divided into a dry cylinder liner and a wet cylinder liner according to a cooling method, the dry cylinder liner is not in direct contact with a cooling liquid, the outer surface of the wet cylinder liner is in direct contact with the cooling liquid, and water is generally used as the cooling liquid for the marine diesel engine. The wet cylinder liner has a better cooling effect than the dry cylinder liner, but has disadvantages in that sealing is difficult, and cooling water easily leaks out from the cooling chamber, thereby adversely affecting the normal operation of the diesel engine. In addition, the wet cylinder sleeve used by the existing diesel engine is generally cylindrical with a smooth outer surface, so that the heat dissipation area is small, and the heat exchange efficiency is low, so that the heat dissipation requirement of the diesel engine cannot be fully met during high-load operation of the diesel engine.
Therefore, how to improve the heat dissipation capability of the cylinder liner and improve the sealing performance of the cooling cavity of the wet cylinder liner is a problem to be solved.
Disclosure of Invention
An object of the utility model is to provide a can satisfy the heat dissipation demand of engine under higher load, guarantee that the engine can be high-efficient, reliable operation a wet cylinder jacket for boats and ships low-speed diesel engine for a long time.
The purpose of the utility model is realized like this:
the utility model relates to a wet cylinder jacket for boats and ships low-speed diesel engine, characterized by: including the cylinder liner body, the cylinder liner body is installed in the cylinder hole of organism, the top setting of the cylinder liner body is along radially outstanding support shoulder, cylinder liner body middle part sets up the tourus, the lower part of the cylinder liner body sets up the round along circumference and sweeps the gas pocket, cylinder hole upper surface sets up the step, support shoulder and the step axial fixity that cooperatees and realize the cylinder liner body, the tourus contacts the radial fixity that realizes the cylinder liner body with the organism inner wall, support shoulder, the tourus forms the cooling chamber with the organism wall, set up the water inlet channel of intercommunication cooling chamber import and the play water channel of intercommunication cooling chamber export in the organism.
The utility model discloses can also include:
1. the circular ring belt comprises a circular ring belt parallel to the axis of the cylinder sleeve and a circular ring belt forming an included angle of 30 degrees with the axis, a first water sealing ring groove is formed in the circular ring belt parallel to the axis of the cylinder sleeve, a second water sealing ring groove is formed in the circular ring belt forming an included angle of 30 degrees with the axis, and a sealing washer is arranged on the supporting shoulder and the step portion below the supporting shoulder.
2. The water sealing ring installed in the first water sealing ring groove is of a rectangular cross section, the water sealing ring installed in the second water sealing ring groove is of a circular cross section, and the area of the circular cross section is larger than that of the rectangular cross section.
3. The cylinder sleeve body is provided with raised circular arc fins on the outer wall of the cooling cavity part.
The utility model has the advantages that:
1. the cylinder sleeve is provided with the supporting shoulder and the circular ring belt, so that the cylinder sleeve is well positioned in the axial direction and the radial direction.
2. Through set up bellied convex fin in the cooling chamber, can increase the area of contact of cylinder jacket and cooling water, owing to the vortex effect of fin, destroyed the flow superficial layer of cooling water moreover, the cooling water is in turbulent state at the flow in-process. Such setting can improve the heat convection efficiency between cooling water and the cylinder jacket, is favorable to going out the absorptive heat transfer of cylinder jacket, satisfies the heat dissipation demand of engine when high load work.
3. The circular arc-shaped fins can enhance the heat exchange effect of the cylinder sleeve and cooling water and simultaneously can not increase too large flow resistance for the flow of the cooling water, so that the engine can work efficiently and stably for a long time under high load.
4. The cylinder jacket has set up twice and has sealed the water ring groove, wherein the water ring that the second was sealed the water ring groove and was installed is circular cross section to its diameter is great. When the cylinder sleeve is installed, a good seal can be formed by pressing the circular water sealing ring on the inclined wall surface of the machine body. In addition, the first water sealing ring and the sealing gasket below the supporting shoulder can also provide good sealing effect. Therefore compare in traditional wet cylinder jacket, this cylinder jacket is better to the sealed effect in cooling chamber, can effectively prevent the leakage of cooling water, is favorable to the safety and stability work of diesel engine.
5. The cylinder sleeve with the structure has the advantages of high heat exchange efficiency with cooling water, reasonable structure, convenient manufacture and installation and stable working state, thereby improving the stability and reliability of the diesel engine and ensuring the safe and efficient operation of the diesel engine for a long time.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic view of an installation structure of a cylinder liner and a machine body;
FIG. 3 is an overall external view of the present invention;
fig. 4 is a front view of the present invention;
FIG. 5 is a cross-sectional view of a convex rib in the shape of a circular arc.
Detailed Description
The invention will be described in more detail below by way of example with reference to the accompanying drawings:
with reference to fig. 1-5, the present invention relates to a wet cylinder liner for a low-speed diesel engine of a ship, which structurally comprises: the water seal structure comprises a support shoulder 1, a first water seal ring groove 2, a second water seal ring groove 3, circular arc fins 4, an annular belt 5 and a scavenging hole 6.
The top of the cylinder liner has a radially protruding support shoulder 1 for axial positioning of the cylinder liner. The cylinder liner requires the placement of a sealing gasket 11 under the support shoulder 1 during installation. The cylinder sleeve has tourniquet 5, and tourniquet 5 includes the tourniquet that is parallel with the cylinder liner axis and the tourniquet that becomes 30 contained angles with the axis. The cylinder sleeve circular ring belt 5 is provided with two water sealing ring grooves, the circular ring belt parallel to the axis of the cylinder sleeve is provided with a first water sealing ring groove 2, and the circular ring belt forming an included angle of 30 degrees with the axis is provided with a second water sealing ring groove 3. The water sealing ring 9 installed on the first water sealing ring groove 2 is rectangular in cross section, and the water sealing ring 13 installed on the second water sealing ring groove 3 is circular in cross section. The support shoulder 1 and the circular ring belt 5 form a cooling cavity which can cool the upper part of the cylinder sleeve by contacting with the wall surface of the machine body. The wall surface of the cylinder sleeve cooling cavity is provided with raised circular arc-shaped fins 4. And a circle of scavenging holes 6 are arranged at the lower part of the cylinder sleeve along the circumferential direction.
When the engine works, cooling water enters the cooling cavity from the water inlet channel 12, flows along the circumferential direction, exchanges heat with the upper half part of the cylinder sleeve in the process, and finally flows out of the cooling cavity from the water outlet channel 7.
The cylinder jacket can increase the heat exchange area of the wall surface of the cooling cavity by increasing the convex ribs in the cooling cavity, and can destroy the surface layer of the cooling water during flowing to increase the turbulence degree of the cooling water, thereby improving the heat convection efficiency of the cooling water and the wall surface of the cylinder jacket, and the cooling effect of the cooling water on the cylinder is better. In the aspect of improving the sealing performance, the circular ring of the cylinder sleeve is provided with two water sealing rings, the circular water sealing rings are tightly pressed on the wall surface of the inclined machine body, so that the cooling cavity can form good bottom sealing, and in addition, a sealing gasket is arranged below the supporting shoulder at the top of the cylinder sleeve, so that good upper sealing can be formed, and the cooling cavity of the cylinder sleeve has good sealing performance.
The top of the cylinder liner has a radially protruding support shoulder 1 for axial positioning of the cylinder liner, and the cylinder liner requires a sealing gasket 11 to be placed under the support shoulder 1 during installation. The middle part of the outer surface of the cylinder sleeve is provided with a circular ring belt 5, and the circular ring belt 5 comprises a circular ring belt parallel to the axis of the cylinder sleeve and a circular ring belt forming an included angle of 30 degrees with the axis. Wherein, a first water sealing ring groove 2 is arranged on the circular ring belt parallel to the axis of the cylinder sleeve, and a second water sealing ring groove 3 is arranged on the circular ring belt forming an included angle of 30 degrees with the axis. The water sealing ring 9 installed on the first water sealing ring groove is rectangular in cross section, and the water sealing ring 13 installed on the second water sealing ring groove is circular in cross section. The supporting shoulder 1 and the circular ring belt 5 form a cooling cavity capable of cooling the upper part of the cylinder sleeve through contact with the wall surface of the machine body, and the wall surface of the cooling cavity is provided with raised circular arc-shaped fins 4. And a circle of scavenging holes 6 are arranged at the lower part of the cylinder sleeve along the circumferential direction. When the engine works, cooling water enters the cooling cavity from the water inlet channel 12, flows along the circumferential direction, exchanges heat with the upper half part of the cylinder sleeve in the process, and finally flows out of the cooling cavity from the water outlet channel 7.
The specific structure of the utility model is shown in figure 1. The outer surface of the cylinder sleeve main body is provided with a support shoulder 1, a first water sealing ring groove 2, a second water sealing ring groove 3, circular arc fins 4, a circular ring belt 5, a scavenging hole 6 and other structures. Wherein support shoulder 1 is used for the axial positioning of cylinder jacket, and tourniquet 5 is used for the radial positioning of cylinder jacket, and the water-sealing ring groove is used for installing the water-sealing ring in order to prevent the leakage of cooling water, and the scavenge port is the inlet port of the required fresh air of burning.
Fig. 2 is a schematic view of the structure of the cylinder liner when installed in the body cylinder bore. When the cylinder sleeve is installed in the cylinder hole, the supporting shoulder 1 on the top has a larger outer diameter, so that the supporting shoulder can be matched with the step on the upper surface of the cylinder hole, and the cylinder cover is covered and clamped, so that the cylinder sleeve is axially fixed. The circular ring belt 5 in the middle of the cylinder sleeve is contacted with the wall surface of the machine body so as to form radial fixation of the cylinder sleeve.
The supporting shoulder 1 and the circular ring belt 5 are contacted with the wall surface of the machine body to form a cooling cavity, and the wall surface of the cooling cavity is contacted with cooling water to conduct convection heat transfer, so that the upper part of the cylinder sleeve is cooled. The cooling chamber wall is provided with bellied convex fin 4, and convex fin 4 can increase the area of contact of cylinder jacket and cooling water, and the convex fin can destroy the superficial layer that forms when the cooling water flows in addition, makes the cooling water be in turbulent state, and the disturbance when the cooling water flows is stronger to make the heat convection efficiency between cooling water and the cylinder jacket obtain improving.
Two water sealing ring grooves are formed in the upper surface of the circular ring belt 5 in the middle of the cylinder sleeve, a rectangular water sealing ring 9 and a circular water sealing ring 13 are respectively installed, and the diameter of the circular water sealing ring 13 is larger. When the cylinder sleeve is installed, a good sealing effect is formed by pressing the circular water sealing ring 13 on the inclined wall surface of the machine body. Furthermore, the rectangular water-sealing ring 9 and the sealing washer 11 under the support shoulder can also provide a good sealing effect.
As shown in fig. 2, when the engine is in operation, the cooling water enters the cooling chamber from the water inlet channel 12 and flows from the left side to the right side in the circumferential direction, and in the process, the cooling water performs heat convection with the wall surface of the upper portion of the cylinder liner, the temperature of the cooling water rises, and the cylinder liner is cooled. Because the circular arc-shaped fins disturb the cooling water, the cooling water cannot form a stable flowing surface layer in the flowing process and is in a turbulent flow state, so that the heat convection efficiency of the wall surface of the cylinder sleeve and the cooling water is high, and the cooling effect is good. Finally, the cooling water flows out of the cooling cavity from the water outlet hole 7.
Claims (4)
1. A wet cylinder sleeve for a ship low-speed diesel engine is characterized in that: including the cylinder liner body, the cylinder liner body is installed in the cylinder hole of organism, the top setting of the cylinder liner body is along radially outstanding support shoulder, cylinder liner body middle part sets up the tourus, the lower part of the cylinder liner body sets up the round along circumference and sweeps the gas pocket, cylinder hole upper surface sets up the step, support shoulder and the step axial fixity that cooperatees and realize the cylinder liner body, the tourus contacts the radial fixity that realizes the cylinder liner body with the organism inner wall, support shoulder, the tourus forms the cooling chamber with the organism wall, set up the water inlet channel of intercommunication cooling chamber import and the play water channel of intercommunication cooling chamber export in the organism.
2. The wet cylinder liner for a marine low-speed diesel engine according to claim 1, characterized in that: the circular ring belt comprises a circular ring belt parallel to the axis of the cylinder sleeve and a circular ring belt forming an included angle of 30 degrees with the axis, a first water sealing ring groove is formed in the circular ring belt parallel to the axis of the cylinder sleeve, a second water sealing ring groove is formed in the circular ring belt forming an included angle of 30 degrees with the axis, and a sealing washer is arranged on the supporting shoulder and the step portion below the supporting shoulder.
3. The wet cylinder liner for a marine low-speed diesel engine according to claim 2, characterized in that: the water sealing ring installed in the first water sealing ring groove is of a rectangular cross section, the water sealing ring installed in the second water sealing ring groove is of a circular cross section, and the area of the circular cross section is larger than that of the rectangular cross section.
4. A wet cylinder liner for a marine low-speed diesel engine according to any one of claims 1 to 3, characterized in that: the cylinder sleeve body is provided with raised circular arc fins on the outer wall of the cooling cavity part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920640394.5U CN209818176U (en) | 2019-05-07 | 2019-05-07 | Wet cylinder sleeve for ship low-speed diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920640394.5U CN209818176U (en) | 2019-05-07 | 2019-05-07 | Wet cylinder sleeve for ship low-speed diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209818176U true CN209818176U (en) | 2019-12-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920640394.5U Active CN209818176U (en) | 2019-05-07 | 2019-05-07 | Wet cylinder sleeve for ship low-speed diesel engine |
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| Country | Link |
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| CN (1) | CN209818176U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109958545A (en) * | 2019-05-07 | 2019-07-02 | 哈尔滨工程大学 | A kind of wet liner for marine low speed diesel engine |
| CN111140392A (en) * | 2019-12-31 | 2020-05-12 | 广东科力远控股有限公司 | Engine heat dissipation cooling structure |
-
2019
- 2019-05-07 CN CN201920640394.5U patent/CN209818176U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109958545A (en) * | 2019-05-07 | 2019-07-02 | 哈尔滨工程大学 | A kind of wet liner for marine low speed diesel engine |
| CN111140392A (en) * | 2019-12-31 | 2020-05-12 | 广东科力远控股有限公司 | Engine heat dissipation cooling structure |
| CN111140392B (en) * | 2019-12-31 | 2021-07-23 | 广东科力远控股有限公司 | Engine heat dissipation cooling structure |
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