CN208122970U - Cylinder cap, engine - Google Patents
Cylinder cap, engine Download PDFInfo
- Publication number
- CN208122970U CN208122970U CN201820435842.3U CN201820435842U CN208122970U CN 208122970 U CN208122970 U CN 208122970U CN 201820435842 U CN201820435842 U CN 201820435842U CN 208122970 U CN208122970 U CN 208122970U
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- Prior art keywords
- cylinder cap
- engine
- shrinkage pool
- arc section
- ontology
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- 238000002485 combustion reaction Methods 0.000 claims abstract description 19
- 230000002093 peripheral effect Effects 0.000 claims abstract description 14
- 239000000498 cooling water Substances 0.000 claims description 7
- 238000005336 cracking Methods 0.000 abstract description 6
- 238000013021 overheating Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 20
- 238000010586 diagram Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 208000025599 Heat Stress disease Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009313 farming Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Landscapes
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The utility model provides a kind of cylinder cap, engine.The cylinder cap, including cylinder cap ontology, the cylinder cap ontology have exhaust duct, and the gas inlet port of the exhaust duct is equipped with shrinkage pool, laminar flow air mass is capable of forming at the circumferential peripheral wall of the shrinkage pool, so that the high-temperature gas in combustion chamber is isolated with cylinder cap ontology.Cylinder cap according to the present utility model, engine, the high temperature of engine chamber can be isolated, and reduce the thermic load of conduction to cylinder cap, reduce risk of the cylinder cap because overheating Local Cracking.
Description
Technical field
The utility model belongs to technical field of engines, and in particular to a kind of cylinder cap, engine.
Background technique
Internal combustion engine high, revolving speed and the wide thermal machine of Power coverage range as a kind of thermal efficiency, are widely used in vehicle
, the various fields such as ship, agricultural, engineering machinery.In recent years, intensification with the failure of the energy and pollution, it is right both at home and abroad
The requirement of engine energy-saving emission reduction is increasingly strict, and engine constantly develops to the direction of high-power, high pressure-charging, high compression ratio, so
And consequent is the problem of high output engine all suffers from thermic load, is answered in heat such as cylinder head ridge area, oil injector holes
Fatigue damage easily occurs for the position that power is concentrated and because failing caused by hot tearing.Therefore, accurately predict and reduce engine thermal
Load is extremely important.
Cylinder cap is that structure is most complicated in internal combustion engine, and one of worst components of operating condition, it is collectively formed with piston
Combustion chamber directly contacts the high-temperature high-pressure fuel gas in cylinder, under this operating condition, if cylinder cap temperature in internal combustion engine working process
More than the maximum temperature that it can bear, the problems such as easily causing cylinder cap heat fatigue cracking, existing way be using it is new more
Material cylinder cap resistant to high temperature, but this mode should also improve the structure of cylinder cap itself, and it is appropriate to carry out to high-temperature area
It is cooling or heat-insulated, thus the rationally high heat load of application cylider cover.
As shown in Figure 1, existing DI diesel engine exhaust duct of cylinder cover entrance mostly uses chamfering type ring to peripheral wall 22, it should
Smoothly, processing technology is simple for structure exhaust stream ratio, but burns instantaneous generation high-temperature gas, and a portion heat directly passes
Cylinder cap is passed, heat loss is caused, while increases cylinder cap local temperature, increases the thermic load of cylinder cap.
Utility model content
Therefore, the technical problem to be solved by the present invention is to provide a kind of cylinder caps, engine, can fire engine
The high temperature for burning room is isolated, and the thermic load of conduction to cylinder cap is reduced, and reduces risk of the cylinder cap because overheating Local Cracking.
To solve the above-mentioned problems, the utility model provides a kind of cylinder cap, including cylinder cap ontology, and the cylinder cap ontology has
Exhaust duct, the gas inlet port of the exhaust duct are equipped with shrinkage pool, are capable of forming laminar flow air mass at the circumferential peripheral wall of the shrinkage pool, with
The high-temperature gas in combustion chamber is isolated with cylinder cap ontology.
Preferably, the circumferential peripheral wall has the circumferential recessed portion for being used to form the laminar flow air mass.
Preferably, the section of central symmetry plane of the circumferential recessed portion along the shrinkage pool is arc section.
Preferably, when the circumferential recessed portion is arc section, the radius of the arc section is the 1/ of the shrinkage pool diameter
16-3/8。
Preferably, the radius of the arc section is the 1/8 of the shrinkage pool diameter.
Preferably, the arc section arc length is L, and the Origin And Destination of arc section described in distance is formed on the arc section
The farthest point of string is H, H=L/10 at a distance from the string.
Preferably, the cylinder cap further includes cooling water channel, and the cooling water channel is set to the cylinder cap ontology and the combustion
Burn the opposite side in room.
Preferably, the cylinder cap is diesel engine cylinder cover.
The utility model also provides a kind of engine, including above-mentioned cylinder cap.
Preferably, the engine is diesel engine.
Cylinder cap provided by the utility model, engine, due to foring laminar flow air mass, the layer at the circumferential peripheral wall
Gas flow rate in gas group is negligible, therefore the laminar flow air mass is equivalent to an opposing stationary air mass and is in described
Between cylinder cap ontology and the combustion chamber, the temperature of laminar flow air mass at this time will be significantly lower than the temperature of the high-temperature gas, this
High-temperature gas in the combustion chamber Shi Suoshu due to the laminar flow air mass presence and be isolated with the cylinder cap ontology namely the combustion
The high-temperature gas burnt in room cannot be directly with the cylinder cap body contacts, while the flow velocity of the high-temperature gas is exceedingly fast, thus institute
The high-temperature gas stated will quickly be discharged along the center of the exhaust duct, thus reduce the thermic load of conduction to cylinder cap,
Reduce risk of the cylinder cap because overheating Local Cracking.
Detailed description of the invention
Fig. 1 is the partial schematic diagram of cylinder cap in the prior art；
Fig. 2 is the partial schematic diagram of the cylinder cap of the utility model embodiment；
Fig. 3 is the partial enlargement diagram of the exhaust duct in Fig. 2.
Appended drawing reference is expressed as：
1, cylinder cap ontology；2, exhaust duct；21, shrinkage pool；22, circumferential peripheral wall；3, laminar flow air mass.
Specific embodiment
In conjunction with referring to shown in Fig. 1 to 3, embodiment according to the present utility model provides a kind of cylinder cap, including cylinder cap ontology 1,
The cylinder cap ontology 1 has exhaust duct 2, and the gas inlet port of the exhaust duct 2 is equipped with shrinkage pool 21, the circumferential direction week of the shrinkage pool 21
Laminar flow air mass 3 is capable of forming at wall 22, so that the high-temperature gas in combustion chamber is isolated with cylinder cap ontology 1.In the technical solution, by
In foring laminar flow air mass 3 at the circumferential peripheral wall 22, the gas flow rate in the laminar flow air mass 3 is negligible, therefore
The laminar flow air mass 3 is equivalent to an opposing stationary air mass and is between the cylinder cap ontology 1 and the combustion chamber, at this time
The temperature of laminar flow air mass 3 will be significantly lower than the temperature of the high-temperature gas, and the high-temperature gas in the combustion chamber is by institute at this time
State the presence of laminar flow air mass 3 and be isolated with the cylinder cap ontology 1 namely the combustion chamber in high-temperature gas cannot directly and institute
The contact of cylinder cap ontology 1 is stated, while the flow velocity of the high-temperature gas is exceedingly fast, thus the high-temperature gas will be along the exhaust duct
Center be quickly discharged, thus reduce conduction to cylinder cap thermic load, reduce cylinder cap because overheat Local Cracking wind
Danger.And the circumferential peripheral wall of existing straight line chamfering type not will form the laminar flow air mass 3 then close to the side of combustion chamber, High Temperature Gas
Body will be flowed out along the straight line of the circumferential peripheral wall.
In order to guarantee to be formed a more stable laminar flow air mass 3, it is preferable that the circumferential direction peripheral wall 22, which has, to be used to form
The circumferential recessed portion of the laminar flow air mass 3, further, section of the circumferential direction recessed portion along the central symmetry plane of the shrinkage pool
Face is arc section or broken line.At this point, under the action of the arc section or broken line, due to gas motion viscosity and wall
The frictional resistance in face, to form the laminar flow air mass 3.
For the ease of arrangement of the circumferential peripheral wall 22 in the shrinkage pool 21, difficulty of processing is reduced, it is preferable that the ring
It along the section of the central symmetry plane of the shrinkage pool 21 is arc section to recessed portion, the radius of the arc section is that the shrinkage pool 21 is straight
The 1/16-3/8 of diameter, further, the radius R of the arc section are the 1/8 of 21 diameter of phi of shrinkage pool.
Preferably, the arc section arc length is L, and the Origin And Destination of arc section described in distance is formed on the arc section
The farthest point of string is H, H=L/10 at a distance from the string, at this point, can guarantee the more smooth landform of the circumferential peripheral wall 22
At the laminar flow air mass 3, meanwhile, also it is more conducive to the stability of the laminar flow air mass 3.
Preferably, the cylinder cap further includes cooling water channel, and the cooling water channel is set to the cylinder cap ontology 1 and the combustion
Burn the opposite side in room.The setting of the cooling water channel keeps the side of the cylinder cap ontology 1 far from the combustion chamber strong
System cools, and can be further reduced the thermic load of conduction to cylinder cap, reduces risk of the cylinder cap because overheating Local Cracking.
Preferably, the cylinder cap is diesel engine cylinder cover.
Embodiment according to the present utility model also provides a kind of engine, including above-mentioned cylinder cap.The cylinder cap can be wide
The general various engines applied to medium and heavy truck, engineering machinery, ship, generating set, automobile, farming equipment and recreation vehicle etc.
In.
Preferably, the engine is diesel engine.
Those skilled in the art will readily recognize that above-mentioned each advantageous manner can be free under the premise of not conflicting
Ground combination, superposition.
The above is only the preferred embodiments of the present utility model only, is not intended to limit the utility model, all practical at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the guarantor of the utility model within novel spirit and principle
Within the scope of shield.Above are merely preferred embodiments of the utility model, it is noted that for the ordinary skill of the art
For personnel, without deviating from the technical principle of the utility model, several improvements and modifications can also be made, these improvement
It also should be regarded as the protection scope of the utility model with modification.
Claims (10)
1. a kind of cylinder cap, which is characterized in that including cylinder cap ontology (1), the cylinder cap ontology (1) has exhaust duct (2), the row
The gas inlet port of air flue (2) is equipped with shrinkage pool (21), is capable of forming laminar flow air mass at the circumferential peripheral wall (22) of the shrinkage pool (21)
(3), so that the high-temperature gas in combustion chamber is isolated with cylinder cap ontology (1).
2. cylinder cap according to claim 1, which is characterized in that the circumferential direction peripheral wall (22), which has, is used to form the laminar flow
The circumferential recessed portion of air mass (3).
3. cylinder cap according to claim 2, which is characterized in that center pair of the circumferential direction recessed portion along the shrinkage pool (21)
The section in face is referred to as arc section.
4. cylinder cap according to claim 3, which is characterized in that when the circumferential recessed portion is arc section, the circular arc
The radius of section is the 1/16-3/8 of the shrinkage pool (21) diameter.
5. cylinder cap according to claim 4, which is characterized in that the radius of the arc section is the shrinkage pool (21) diameter
1/8。
6. cylinder cap according to claim 5, which is characterized in that the arc section arc length is L, distance institute on the arc section
Stating the farthest point of string that the Origin And Destination of arc section is formed is H, H=L/10 with the string at a distance from.
7. cylinder cap as claimed in any of claims 1 to 6, which is characterized in that it further include cooling water channel, the cooling
Water channel is set to the cylinder cap ontology (1) side opposite with the combustion chamber.
8. cylinder cap according to claim 1, which is characterized in that the cylinder cap is diesel engine cylinder cover.
9. a kind of engine, including cylinder cap, which is characterized in that the cylinder cap is cylinder described in any one of claim 1 to 7
Lid.
10. engine according to claim 9, which is characterized in that the engine is diesel engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820435842.3U CN208122970U (en) | 2018-03-29 | 2018-03-29 | Cylinder cap, engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820435842.3U CN208122970U (en) | 2018-03-29 | 2018-03-29 | Cylinder cap, engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208122970U true CN208122970U (en) | 2018-11-20 |
Family
ID=64193421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820435842.3U Active CN208122970U (en) | 2018-03-29 | 2018-03-29 | Cylinder cap, engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208122970U (en) |
-
2018
- 2018-03-29 CN CN201820435842.3U patent/CN208122970U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231103 Address after: East 1st Floor, Building 4, Shengrui Industrial Park, No. 6555 Baotong East Street, Zhuojing Community, Qingchi Street, High tech Zone, Weifang City, Shandong Province, 261000 Patentee after: Boding power (Shandong) Co.,Ltd. Address before: Building A3, Building 6 Huafeng Road, Huaming High tech Industrial Zone, Dongli District, Tianjin City, 300304, Floor 1, Zone C Patentee before: TIANJIN ZHONGHENG POWER RESEARCH INSTITUTE Co.,Ltd. |