CN111058959B - Cylinder cover and cylinder cover cooling water cavity structure thereof - Google Patents
Cylinder cover and cylinder cover cooling water cavity structure thereof Download PDFInfo
- Publication number
- CN111058959B CN111058959B CN201911398644.XA CN201911398644A CN111058959B CN 111058959 B CN111058959 B CN 111058959B CN 201911398644 A CN201911398644 A CN 201911398644A CN 111058959 B CN111058959 B CN 111058959B
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- water
- water cavity
- cooling
- cavity
- bottom plate
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- 239000000498 cooling water Substances 0.000 title claims abstract description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 118
- 238000001816 cooling Methods 0.000 claims abstract description 50
- 238000005192 partition Methods 0.000 claims abstract description 24
- 238000005553 drilling Methods 0.000 claims abstract description 17
- 241000287828 Gallus gallus Species 0.000 claims description 4
- 210000000078 claw Anatomy 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims 2
- 238000005474 detonation Methods 0.000 abstract description 4
- 238000005457 optimization Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 9
- 238000004880 explosion Methods 0.000 description 8
- 239000002131 composite material Substances 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 230000006872 improvement Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F1/26—Cylinder heads having cooling means
- F02F1/36—Cylinder heads having cooling means for liquid cooling
- F02F1/40—Cylinder heads having cooling means for liquid cooling cylinder heads with means for directing, guiding, or distributing liquid stream
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F1/242—Arrangement of spark plugs or injectors
Abstract
The invention relates to a cooling water cavity structure of a cylinder cover in the technical field of diesel engines, which comprises a cylinder cover body and a cooling water cavity arranged in the cylinder cover body; the cylinder cover body comprises a main body frame formed by a top plate, side walls, a middle partition plate, an oil sprayer sleeve and a bottom plate, an oil sprayer accommodating cavity and an exhaust passage are arranged in the cylinder cover body, and a water seal sleeve is arranged in the oil sprayer accommodating cavity; the cooling water cavity comprises an upper water cavity, a lower water cavity, an exhaust passage water cavity and a central water cavity, and the central water cavity, the upper water cavity, the lower water cavity and the exhaust passage water cavity are sequentially communicated; the bottom plate is provided with a bottom plate cooling drilling hole, and the bottom plate cooling drilling hole is communicated with the central water cavity. The invention also provides a cylinder cover. The cylinder cover has no contradiction between structural strength and cooling optimization, and can bear higher detonation pressure and heat load.
Description
Technical Field
The invention relates to the technical field of engines, in particular to a cylinder cover and a cylinder cover cooling water cavity structure thereof, and especially relates to a cylinder cover composite efficient cooling structure scheme suitable for high detonation pressure and high thermal load.
Background
The cylinder head is an important part of a diesel engine, is in direct contact with high-temperature and high-pressure gas in a combustion chamber during operation, bears very high thermal load and mechanical load, and needs to have enough structural strength and be sufficiently cooled. The exhaust passage on the cylinder cover and the exhaust valve seat arranged on the cylinder cover are exhaust passages of high-temperature exhaust gas of the diesel engine, and are both directly contacted with the high-temperature fuel gas, bear high heat load and also need to be fully cooled.
In order to improve the contradiction between the structural strength and the thermal load, the following improvements are proposed in the prior art:
the scheme one is to keep thinner bottom plate, guarantee the cooling effect, increase the well baffle of being connected with the bottom plate simultaneously, strengthen bottom plate structural strength through the middle baffle, as shown in the following figure, but because bottom plate cooling drilling height position is limited by outside non-drilling cooling area wall thickness, drilling is great apart from bottom plate thermal face distance, consequently the cooling effect can only satisfy the user demand of middle and low index diesel engine.
The scheme II is that the bottom plate is cooled through drilling, the flow velocity in the drilling is high, and the distance from the thermal power surface of the bottom plate is small, so that the cooling effect on the bottom plate can be enhanced, and meanwhile, the structural strength is improved by adopting a mode of increasing the thickness of the bottom plate. As shown in the following graph, the scheme can better solve the contradiction between the heat load and the structural strength, and the cooling and structural strength can meet the use requirement of the diesel engine with medium index, but the cooling effect is difficult to meet the requirement of the diesel engine with higher index.
In recent years, with the continuous improvement of design indexes, the heat load and the gas explosion pressure of a diesel engine are continuously increased, and the highest explosion pressure reaches 30Mpa. The above-described cylinder head construction solutions have failed to meet structural strength and cooling requirements.
According to the prior art, the Chinese patent publication No. CN107208568B discloses a cylinder head which can effectively cool the air flowing in the air inlet of each cylinder without causing the difference between the cylinders. A cooling water flow passage is provided around an intake port in the cylinder head. The cooling water flow path includes a plurality of water jackets that independently cover a portion of the respective wall surfaces of the plurality of intake ports. Further, the cooling water flow path includes a main flow path for cooling water supply extending in the longitudinal direction of the cylinder head at an upper portion of the intake port row, and the main flow path and the corresponding water jacket are each connected via a branch flow path for cooling water supply. The invention has contradiction between the structural strength of the cylinder cover and the cooling optimization, and has certain limitation on bearing higher explosion pressure and heat load.
Disclosure of Invention
In view of the defects in the prior art, the invention aims to provide a cylinder cover and a cylinder cover cooling water cavity structure thereof.
The invention provides a cylinder head cooling water cavity structure, which comprises a cylinder head body and a cooling water cavity arranged in the cylinder head body;
the cylinder cover body comprises a main body frame formed by a top plate, side walls, a middle partition plate, an oil sprayer sleeve and a bottom plate, an oil sprayer accommodating cavity and an exhaust passage are arranged in the cylinder cover body, and a water seal sleeve is arranged in the oil sprayer accommodating cavity;
the cooling water cavity comprises an upper water cavity, a lower water cavity, an exhaust passage water cavity and a central water cavity, and the central water cavity, the upper water cavity, the lower water cavity and the exhaust passage water cavity are sequentially communicated;
the bottom plate is provided with a bottom plate cooling drilling hole, and the bottom plate cooling drilling hole is communicated with the central water cavity.
In some embodiments, a plurality of sets of the bottom plate cooling bores are provided on the cylinder head body, each set of the bottom plate cooling bores being arranged in a "chicken claw" shape.
In some embodiments, the downcomer is located between the middle barrier and the floor, and the downcomer secondary cools the floor.
In some embodiments, the lower water chamber is an annular water chamber.
In some embodiments, the upper water chamber is enclosed by the top plate, the injector sleeve, the middle partition plate, and the side wall.
In some embodiments, a partition plate is disposed between the upper water chamber and the exhaust passage water chamber 15, and the partition plate is connected between the top plate and the bottom plate.
In some embodiments, the exhaust passage is cooled by the upper water cavity, the lower water cavity and the exhaust passage water cavity, and the exhaust passage water cavity is connected with the water outlet.
In some embodiments, the central water chamber is located between the injector sleeve and the water seal sleeve.
In some embodiments, the intermediate diaphragm is connected to the base plate in an inclined manner, and the injector sleeve is connected to the base plate.
A cylinder cover comprises the cylinder cover cooling water cavity structure.
Compared with the prior art, the invention has the following beneficial effects:
1. the cylinder cover has no contradiction between structural strength and cooling optimization, and can bear higher detonation pressure and heat load.
2. According to the invention, through the optimal design of the cooling water cavity structure, the bottom plate is subjected to secondary composite cooling, so that the cylinder cover can bear higher heat load.
3. According to the invention, the partition plate and the oil sprayer sleeve are arranged, so that the overall structural strength of the cylinder cover is enhanced, the explosion pressure born by the bottom plate is further improved, and meanwhile, the partition plate improves the speed of cooling water in the upper water cavity and the lower water cavity, namely, the replacement frequency of the cooling water is improved, and the cooling effect is improved.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a cross-sectional view S1-S1 of the present invention;
FIG. 3 is a sectional view of the invention S2-S2.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present invention.
Example 1
The embodiment provides a diesel engine cylinder cover structure and a cooling scheme which can bear high explosion pressure and high heat load.
As shown in fig. 1-3, in the cooling water cavity structure of the cylinder head according to the present invention, the main frame structure of the cylinder head body 1 is composed of a bottom plate 9, a middle partition 8, an injector sleeve 4 and a side wall 5, the explosion pressure borne by the bottom plate 9 is mainly borne by the middle partition 8, the injector sleeve 4 and the side wall 5, wherein the bottom plate 9 is processed with bottom plate cooling holes 11, the bottom plate 9 is cooled for the first time through the cooling effect provided by the bottom plate cooling holes 11, preferably, a plurality of bottom plate cooling holes 11 form a group of "chicken claw" shaped structures, the cylinder head body 1 is provided with a plurality of groups of cooling water channels of "chicken claw" shaped structures, and further, the groups of bottom plate cooling holes 11 on the cylinder head body 1 are arranged in a substantially symmetrical manner.
The cylinder head body 1 is internally provided with a lower water cavity 12, an upper water cavity 6, an exhaust passage water cavity 15 and a central water cavity 19, and all the cooling water cavities are communicated, in particular:
the central water cavity 19 is communicated with the upper water cavity 6 through a transverse water hole 18 formed in the oil sprayer sleeve 4, the upper water cavity 6 is communicated with the lower water cavity 12 through a lower water hole 7 formed in the middle partition plate 8, the lower water cavity 12 is communicated with the exhaust passage water cavity 15 through a side water hole 13 formed in the partition plate 14, the exhaust passage water cavity 15 is communicated with the water outlet 16 of the cylinder cover body 1, and meanwhile, the bottom plate cooling drilling 11 is communicated with the central water cavity 19 through an upper water hole 10 formed in the bottom plate 9.
The cooling process of the cylinder cover is as follows:
the cooling water of the cylinder cover flows into the center from the bottom plate cooling drilling 11 from outside to the center, firstly cools the bottom plate 9 of the cylinder cover, then flows into the center water cavity 19 through the water supply holes 10, flows into the water supply cavity 6 through the transverse water holes 18 after the water seal sleeve 2 is cooled in the center water cavity 19, flows into the water drain cavity 12 through the water drain holes 7 on the middle partition plate 8 after the exhaust passage 17 is cooled in the water supply cavity 6, secondly cools the bottom plate 9, simultaneously cools the lower part of the exhaust passage 17, then flows into the exhaust passage water cavity 15 through the side water holes 13, and flows out of the cylinder cover water outlet 16 after the outlet area of the exhaust passage 17 is cooled.
In this embodiment, the bottom plate 9 is mainly cooled by cooling water in the bottom plate cooling holes 11, wherein the distance between the bottom plate cooling holes 11 and the bottom plate 9 is not limited by the thickness of the bottom plate 9, in order to enhance the cooling effect of the cylinder head, the cooling of the bottom plate can be enhanced by reducing the height of the bottom plate cooling holes 11 on the bottom plate and the distance between the cooling water and the high temperature gas side of the bottom plate 9, and meanwhile, the bottom plate 9 is further cooled by the cooling water of the water discharging cavity 6, namely, the bottom plate 9 is subjected to secondary composite cooling, and the cylinder head can bear higher heat load through the composite cooling of the bottom plate.
As a further preferable scheme, the cooling device further comprises a partition plate 14, wherein the partition plate 14 is connected between the top plate 3 and the bottom plate 9, the partition plate 14 divides the water feeding cavity 6 into a plurality of cooling cavities, so that the water flow speed of the cooling water in the water feeding cavity 6, namely the replacement rate of the cooling water, can be improved, and the cooling effect is improved. At this time, the explosion pressure borne by the bottom plate 9 is also mainly borne by the middle partition plate 8, the injector sleeve 4, the side wall 5, and the partition plate 14, so that the overall structural strength of the cylinder head body 1 can be enhanced, and the explosion pressure borne by the bottom plate 9 can be further improved.
In summary, the structural strength of the cylinder cover and the cooling optimization are not contradicted, and the cylinder cover can bear higher detonation pressure and heat load; in the embodiment, through the optimal design of the cooling water cavity structure, the bottom plate can be subjected to secondary composite cooling, so that the cylinder cover can bear higher heat load; through setting up division board and sprayer sleeve in this embodiment, strengthened the overall structure intensity of cylinder head, further improved the pressure of bursting that the bottom plate can bear, improved the water velocity of the cooling water in the water cavity simultaneously, the change speed of cooling water promptly, promote the cooling effect.
Example 2
As shown in fig. 1-3, this embodiment provides a cylinder head, in which the cylinder head specifically adopts the cylinder head cooling water cavity structure described in embodiment 1 of the present invention, and the cylinder head cooling water cavity structure in the cylinder head has been described in detail in embodiment 1 above, and the details are omitted, and other structures of the cylinder head are in the prior art and are not described in detail.
The foregoing describes specific embodiments of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the invention. The embodiments of the present application and features in the embodiments may be combined with each other arbitrarily without conflict.
Claims (5)
1. The cooling water cavity structure of the cylinder cover is characterized by comprising a cylinder cover body (1) and a cooling water cavity arranged in the cylinder cover body (1);
the cylinder cover body (1) comprises a main body frame formed by a top plate (3), a side wall (5), a middle partition plate (8), an oil sprayer sleeve (4) and a bottom plate (9), wherein an oil sprayer accommodating cavity and an exhaust passage (17) are arranged in the cylinder cover body (1), and a water seal sleeve (2) is arranged in the oil sprayer accommodating cavity;
the cooling water cavity comprises an upper water cavity (6), a lower water cavity (12), an exhaust passage water cavity (15) and a central water cavity (19), wherein the central water cavity (19), the upper water cavity (6), the lower water cavity (12) and the exhaust passage water cavity (15) are sequentially communicated;
the bottom plate (9) is provided with a bottom plate cooling drilling hole (11), and the bottom plate cooling drilling hole (11) is communicated with the central water cavity (19);
a plurality of groups of bottom plate cooling drilling holes (11) are formed in the cylinder head body (1), and each group of bottom plate cooling drilling holes (11) are arranged in a chicken claw shape;
the upper water cavity (6) is formed by enclosing the top plate (3), the oil sprayer sleeve (4), the middle partition plate (8) and the side wall (5);
a separation plate (14) is arranged between the upper water cavity (6) and the exhaust passage water cavity (15), and the separation plate (14) is connected between the top plate (3) and the bottom plate (9);
the central water cavity (19) is communicated with the upper water cavity (6) through a transverse water hole (18) formed in the oil sprayer sleeve (4), the upper water cavity (6) is communicated with the lower water cavity (12) through a lower water hole (7) formed in the middle partition plate (8), the lower water cavity (12) is communicated with the exhaust passage water cavity (15) through a side water hole (13) formed in the partition plate (14), the exhaust passage water cavity (15) is communicated with the water outlet (16) in the cylinder cover body (1), and meanwhile, the bottom plate cooling drilling hole (11) is communicated with the central water cavity (19) through an upper water hole (10) formed in the bottom plate (9);
the lower water cavity (12) is positioned between the middle partition plate (8) and the bottom plate (9), and the lower water cavity (12) carries out secondary cooling on the bottom plate (9);
the middle partition plate (8) is obliquely connected with the bottom plate (9), and the oil sprayer sleeve (4) is connected with the bottom plate (9);
the cooling water of the cylinder cover flows into the center from the bottom plate cooling drilling hole (11) from outside to the center, the cooling water flows into the center water cavity (19) through the water supply hole (10), the cooling water flows into the water supply cavity (6) through the transverse water hole (18) after the water seal sleeve (2) is cooled by the center water cavity (19), after the air exhaust channel (17) of the cooling part of the water supply cavity (6), the cooling water flows into the water supply cavity 12 through the water supply hole (7) on the middle partition plate (8), the bottom plate (8) is cooled for the second time, the lower part of the air exhaust channel (17) is cooled, the cooling water flows into the air exhaust channel (15) through the side water hole (13), and the cooling water flows out of the water outlet (16) of the cylinder cover after the outlet area of the air exhaust channel (17) is cooled.
2. The cylinder head cooling water chamber structure according to claim 1, characterized in that the lower water chamber (12) is an annular water chamber.
3. The cylinder head cooling water chamber structure according to claim 1, characterized in that the exhaust passage (17) is cooled by the upper water chamber (6), the lower water chamber (12) and the exhaust passage water chamber (15), the exhaust passage water chamber (15) being connected to a water outlet (16).
4. The cylinder head cooling water chamber structure according to claim 1, characterized in that the central water chamber (19) is located between the injector sleeve (4) and the water seal sleeve (2).
5. A cylinder head comprising the cylinder head cooling water chamber structure of any one of claims 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911398644.XA CN111058959B (en) | 2019-12-30 | 2019-12-30 | Cylinder cover and cylinder cover cooling water cavity structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911398644.XA CN111058959B (en) | 2019-12-30 | 2019-12-30 | Cylinder cover and cylinder cover cooling water cavity structure thereof |
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| Publication Number | Publication Date |
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| CN111058959A CN111058959A (en) | 2020-04-24 |
| CN111058959B true CN111058959B (en) | 2024-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911398644.XA Active CN111058959B (en) | 2019-12-30 | 2019-12-30 | Cylinder cover and cylinder cover cooling water cavity structure thereof |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113719376B (en) * | 2021-09-26 | 2023-03-17 | 一汽解放汽车有限公司 | Cylinder head, cylinder head cooling system, engine and cylinder head cooling method |
| US11566580B1 (en) * | 2021-10-26 | 2023-01-31 | Progress Rail Locomotive Inc. | Cylinder head assembly having fuel injector sleeve for mid-deck reacting of injector clamping load |
| CN114962050B (en) * | 2021-12-16 | 2023-10-13 | 中国船舶集团有限公司第七一一研究所 | Cylinder head cooling water cavity structure, cylinder head and diesel engine |
| CN114352428B (en) * | 2021-12-16 | 2022-11-08 | 中国船舶集团有限公司第七一一研究所 | Split type cylinder head and cylinder |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0533640A (en) * | 1991-07-24 | 1993-02-09 | Yanmar Diesel Engine Co Ltd | Cylinder head of water-cooled internal combustion engine |
| CN203022903U (en) * | 2012-12-17 | 2013-06-26 | 安徽华菱汽车有限公司 | Water cooling engine and cylinder covers of water cooling engine |
| KR101394767B1 (en) * | 2013-08-16 | 2014-05-16 | 현대중공업 주식회사 | Clean engine with simplified pathway of cooling water |
| CN106523177A (en) * | 2016-12-08 | 2017-03-22 | 四川中车玉柴发动机股份有限公司 | Novel cylinder cover of diesel engine |
| CN109854404A (en) * | 2018-12-28 | 2019-06-07 | 潍柴动力股份有限公司 | Engine-cooling system and engine |
| CN109854403A (en) * | 2018-12-21 | 2019-06-07 | 潍柴动力股份有限公司 | Cylinder head and engine with it |
| CN110242435A (en) * | 2019-07-02 | 2019-09-17 | 重庆潍柴发动机有限公司 | A kind of cylinder cover for diesel engine |
| CN211448836U (en) * | 2019-12-30 | 2020-09-08 | 中国船舶重工集团公司第七一一研究所 | Cylinder head and cylinder head cooling water cavity structure thereof |
-
2019
- 2019-12-30 CN CN201911398644.XA patent/CN111058959B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0533640A (en) * | 1991-07-24 | 1993-02-09 | Yanmar Diesel Engine Co Ltd | Cylinder head of water-cooled internal combustion engine |
| CN203022903U (en) * | 2012-12-17 | 2013-06-26 | 安徽华菱汽车有限公司 | Water cooling engine and cylinder covers of water cooling engine |
| KR101394767B1 (en) * | 2013-08-16 | 2014-05-16 | 현대중공업 주식회사 | Clean engine with simplified pathway of cooling water |
| CN106523177A (en) * | 2016-12-08 | 2017-03-22 | 四川中车玉柴发动机股份有限公司 | Novel cylinder cover of diesel engine |
| CN109854403A (en) * | 2018-12-21 | 2019-06-07 | 潍柴动力股份有限公司 | Cylinder head and engine with it |
| CN109854404A (en) * | 2018-12-28 | 2019-06-07 | 潍柴动力股份有限公司 | Engine-cooling system and engine |
| CN110242435A (en) * | 2019-07-02 | 2019-09-17 | 重庆潍柴发动机有限公司 | A kind of cylinder cover for diesel engine |
| CN211448836U (en) * | 2019-12-30 | 2020-09-08 | 中国船舶重工集团公司第七一一研究所 | Cylinder head and cylinder head cooling water cavity structure thereof |
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| CN111058959A (en) | 2020-04-24 |
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