CN102926885B - A kind of Universal minitype petrol motor cylinder cover - Google Patents
A kind of Universal minitype petrol motor cylinder cover Download PDFInfo
- Publication number
- CN102926885B CN102926885B CN201210496361.0A CN201210496361A CN102926885B CN 102926885 B CN102926885 B CN 102926885B CN 201210496361 A CN201210496361 A CN 201210496361A CN 102926885 B CN102926885 B CN 102926885B
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- Prior art keywords
- air outlet
- outlet flue
- cooling
- duct
- cooling duct
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Abstract
The invention discloses a kind of Universal minitype petrol motor cylinder cover, comprise lid, lid there are intake duct, air outlet flue, valve cage, spark plug mounting hole, wind guide and heat dispersion sheet, the guide vane vertical with air outlet flue is had in air outlet flue outlet port, guide vane is also connected with wind guide and heat dispersion sheet, above spark plug mounting hole, have main cooling duct, main cooling duct is perpendicular to the line of intake duct and air outlet flue.The present invention, by reasonable Arrangement cooling duct trend and cooling duct sectional area, under the prerequisite not increasing cooling fan power loss, improves the cooling effect of high-temperature area; Drastically reduce the area the heat load of exhaust silencer to cylinder head by increasing the measures such as wind-guiding heat filter, the heat load of air outlet flue side is improved.Cylinder head whole thermal load obtains good control, is conducive to the complete machine heat load improving petrol engine, reduces oil temperature simultaneously, improves functional reliability and the overall performance of component.
Description
Technical field
The invention belongs to general small-size gasoline engine and manufacture field, particularly relate to a kind of Universal minitype petrol motor cylinder cover.。
Background technique
General small-size gasoline engine has simple and compact for structure, use, wide accommodation, manufacture remarkable advantage easy to maintenance, its type of cooling is generally forced air cooling, but the heat-transfer coefficient dispelled the heat to cooling-air due to cylinder block, cylinder head is little, the particularly high-temperature area heat radiation such as the ridge area difficulty of cylinder head, exhaust silencer is near cylinder head on the other hand, stronger thermal radiation is stamped to cylinder, therefore causes air-cooled gasoline engine and there is higher heat load.Due to general small-size gasoline engine compact structure, cylinder head sub-assembly is provided with critical system and the parts such as gas handling system, vent systems, valve assembly, if the too high meeting of cylinder head heat load causes air inlet not enough, power degradation; Oil temperature is too high, and complete machine functional reliability is had a strong impact on, and therefore the heat load of optimal design cylinder head cools tissue, conservative control cylinder head is one of emphasis of general small-size gasoline engine design.
188F petrol engine belongs to general small-size gasoline engine, and its structural type is: single cylinder, forced air cooling, Overhead valve, and 188F petrol engine belongs to the larger type of discharge capacity in single cylinder general small-size gasoline engine, and output power is large, and complete machine heat load is high.For its cylinder head, mainly contain two high-temperature areas: one is the ridge area between spark plug and inlet and exhaust valve, the surface area of firing chamber, cylinder head bottom surface, and they and combustion gas direct contact heat transfer are in cylinder head; Another is air outlet flue region, and engine exhaust road is subject to " heat is washed away " of the high-temp waste gas of discharging in cylinder on the one hand, and another side is subject to the thermal radiation of exhaust silencer, therefore makes the ridge area of cylinder head often higher with the temperature of air outlet flue side; And the temperature entering the fresh charge of cylinder via intake duct is generally lower than the mean temperature of cylinder head, is stamped " cold punching brush ", makes the temperature of intake duct side lower to cylinder; Cylinder head is due to high temperature and temperature distributing disproportionation is even and thermal stress that is that produce is very large, and under the repeated action of thermal stress, air valve seat ring place and ridge area easily form heat fatigue cracking, and therefore ridge area and air outlet flue region are the cooling emphasis of such type.Also need in addition to cool intake duct and whole cylinder head, cooling intake duct can ensure the fresh charge of the every work cycle of motor, thus ensures the Power output of motor; The entirety cooling of cylinder head contributes to reducing complete machine heat load, is conducive to controller oil temperature, thus ensures effectively lubricating and the reliable operation of moving element.
At present, the cylinder head type of cooling of this type is that cooling air is introduced from intake duct side, first cools intake duct side cylinder head, then ridge area and spark plug high-temperature zone and valve actuating push rod room is cooled, gas flows through air outlet flue and cools, and effluent gases cylinder cap, completes cool cycles.Its major defect is: one be the ridge area of cylinder head, air outlet flue side high-temperature area cannot effective cooling, reason be cooling air when blowing to high-temperature area temperature higher, and the defect in result design air channel makes cooling air delivery limited; Two is that the temperature gradient of intake duct side and air outlet flue side is comparatively large, and thermal stress strengthens, and reliability reduces; Three is that cooling air flow path is unreasonable, and cause valve actuating push rod room place cooling flow much larger than the cooling air delivery at top of combustion chamber place, cylinder head temperature gradient is larger; Four is do not take heat insulation measures to the thermal radiation of exhaust silencer.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides a kind of Universal minitype petrol motor cylinder cover, effectively can solve the cooling of cylinder head ridge area, air outlet flue side high-temperature area, exhaust silencer effectively can be suppressed the thermal radiation of cylinder head, the entirety cooling of cylinder head can be taken into account simultaneously.
For achieving the above object, the present invention adopts following technological scheme: a kind of Universal minitype petrol motor cylinder cover, comprise lid, lid there are intake duct, air outlet flue, valve cage, spark plug mounting hole, wind guide and heat dispersion sheet, the guide vane vertical with air outlet flue is had in air outlet flue outlet port, guide vane is also connected with wind guide and heat dispersion sheet, has main cooling duct above spark plug mounting hole, and main cooling duct is perpendicular to the line of intake duct and air outlet flue.
Be provided with intake duct cooling duct in the both sides of intake duct, intake duct cooling duct communicates with main cooling duct; Be provided with air outlet flue cooling duct in the both sides of air outlet flue, air outlet flue cooling duct also communicates with main cooling duct.
The invention has the beneficial effects as follows by reasonable Arrangement cooling duct trend and cooling duct sectional area, first the cooling of the high-temperature areas such as spark plug, ridge area, air outlet flue is strengthened with original cooling air, around top of combustion chamber, the hottest place in an organized way uses cooling air efficiently radiates heat simultaneously, under the prerequisite not increasing cooling fan power loss, improve the cooling effect of high-temperature area; Drastically reduce the area the heat load of exhaust silencer to cylinder head by increasing the measures such as wind-guiding heat filter, the heat load of air outlet flue side is improved.Cylinder head whole thermal load obtains good control, is conducive to the complete machine heat load improving petrol engine, reduces oil temperature simultaneously, improves functional reliability and the overall performance of component.
Accompanying drawing explanation
Fig. 1 is main TV structure schematic diagram of the present invention.
Fig. 2 is the plan view of Fig. 1.
Fig. 3 is the A-A sectional view in Fig. 2.
Fig. 4 is the left view of Fig. 1.
Fig. 5 is the B-B sectional view in Fig. 2.
Fig. 6 is the right elevation of Fig. 1.
Fig. 7 is the C-C sectional view in Fig. 6.
Fig. 8 is the D-D sectional view in Fig. 6.
In figure, 1 is air outlet flue, and 2 is guide vane, 3 is intake duct, and 4 is spark plug mounting hole, and 5 is valve cage, 6 is firing chamber, and 7 is main cooling duct, and 8 is intake duct cooling duct, 9,10 is air outlet flue cooling duct, and 11 is guiding radiating fin, and 12 is air outlet flue cold passageway, 13 is ridge area, I is intake duct side cooling air, and II is main cooling duct cooling air, and III is air outlet flue side cooling air.
Embodiment
As shown in Figure 1, Figure 2, the Universal minitype petrol motor cylinder cover shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7 and Fig. 8, comprise lid, lid there are intake duct 3, air outlet flue 1, valve cage 5, spark plug mounting hole 4, wind guide and heat dispersion sheet 11, the guide vane 2 vertical with air outlet flue is had in air outlet flue outlet port, guide vane 2 is also connected with wind guide and heat dispersion sheet 11, above spark plug mounting hole 4, have main cooling duct 7, main cooling duct 7 is perpendicular to the line of intake duct and air outlet flue.
Be provided with intake duct cooling duct 8 in the both sides of intake duct 3, intake duct cooling duct 8 communicates with main cooling duct 7; Be provided with air outlet flue cooling duct 9,10 in the both sides of air outlet flue 1, air outlet flue cooling duct 9,10 also communicates with main cooling duct 7.
On 188F petrol engine, the minimum sectional area of main cooling duct is 220 square millimeters.
The present invention combines traditional design method and Modern three-dimensional flow field analysis method, the flow direction of the cooling airflow of optimal design cylinder head and flow distribution, the guide vane that a slice has wind-guiding and heat insulating function is added between air outlet flue and silencing apparatus, cylinder head cooling air is fanned the wind scooper produced through redesigning by gasoline engine cooling air, side above the spark plug original cooling air being directed to cylinder head, this cooling air through three organized air channels to cylinder head from spark plug and side, firing chamber to valve actuating push rod room one side direction flowing cooling air cylinder cap, they are main cooling ducts, intake duct cooling duct, air outlet flue cooling duct, by segmenting the heat sink design of per share cooling duct sectional area size and cylinder head both sides, wind flow is consistent with required heat dissipating capacity everywhere to make to flow through whole cylinder head, complete cool cycles.
The original cooling air guided through wind scooper is blown side to cylinder head by spark plug, original cooling air is divided into 3 tunnels, the first via, main cooling duct cooling air II blows to the main cooling duct 7 at the high-temperature area place such as spark plug, ridge area 13, cooling air in main cooling duct 7, a part continues to move ahead top, cooling combustion room and valve cage 5 bottom thus effluent gases cylinder cap, another part cooling air divides again 2 roads on main cooling duct 7,90 degree turn to intake duct cooling duct 8 to cool intake duct 3 together, and 90 degree turn to air outlet flue cooling duct 9,10 coolant exhaust road 1 together; Second tunnel, intake duct side cooling air I flows through from the passage between the wind guide and heat dispersion sheet 11 of intake duct 3 side, and the cylinder head of cooling intake duct 3 side is also converged with the cooling air that air channel 8 is flowed out, and continues the effluent gases cylinder cap that moves ahead; 3rd tunnel, air outlet flue side cooling air III flows through from the passage between the wind guide and heat dispersion sheet 11 of air outlet flue 1 side, air outlet flue cold passageway 12 between guide vane 2 and air outlet flue 1, the cylinder head in coolant exhaust road 1, high-temperature area and the part such as air outlet flue 1 and exhaust silencer, the cooling air flowed out with air outlet flue cooling duct 9,10 afterwards converges, and continues the effluent gases cylinder cap that moves ahead.Above-mentioned cooling air, while the high temperature surface of cooling its underpart, also cools, as shown in Fig. 2, Fig. 3, Fig. 5, Fig. 8 the valve cage above it and the valve group in valve cage, rocking arm set, lubricant oil.
Claims (1)
1. a Universal minitype petrol motor cylinder cover, comprise lid, lid there are intake duct, air outlet flue, valve cage, spark plug mounting hole, wind guide and heat dispersion sheet, it is characterized in that: have the guide vane vertical with air outlet flue in air outlet flue outlet port, guide vane is also connected with wind guide and heat dispersion sheet, above spark plug mounting hole, have main cooling duct, main cooling duct is perpendicular to the line of intake duct and air outlet flue; Be provided with intake duct cooling duct in the both sides of intake duct, intake duct cooling duct communicates with main cooling duct; Be provided with air outlet flue cooling duct in the both sides of air outlet flue, air outlet flue cooling duct also communicates with main cooling duct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210496361.0A CN102926885B (en) | 2012-11-29 | 2012-11-29 | A kind of Universal minitype petrol motor cylinder cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210496361.0A CN102926885B (en) | 2012-11-29 | 2012-11-29 | A kind of Universal minitype petrol motor cylinder cover |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102926885A CN102926885A (en) | 2013-02-13 |
| CN102926885B true CN102926885B (en) | 2015-08-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210496361.0A Expired - Fee Related CN102926885B (en) | 2012-11-29 | 2012-11-29 | A kind of Universal minitype petrol motor cylinder cover |
Country Status (1)
| Country | Link |
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| CN (1) | CN102926885B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104975977B (en) * | 2015-06-28 | 2022-11-11 | 江苏鑫田柴油机有限公司 | Uniform-temperature enhanced heat dissipation type air-cooled diesel engine cylinder cover |
| CN104975927A (en) * | 2015-06-28 | 2015-10-14 | 金坛鑫田柴油机有限公司 | High-reliability low-machine-temperature energy-saving environment-protecting vertical type air-cooled diesel engine |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1475666A (en) * | 2002-08-18 | 2004-02-18 | 蔡敦良 | Forced air cold engine cylinder cover direct through type air flue |
| JP2006250128A (en) * | 2005-03-14 | 2006-09-21 | Fuji Heavy Ind Ltd | Cylinder head of air-cooled engine |
| CN201284696Y (en) * | 2008-10-22 | 2009-08-05 | 重庆宗申发动机制造有限公司 | Cylinder head of motorcycle engine |
| CN201751556U (en) * | 2010-04-06 | 2011-02-23 | 江门天钇金属工业有限公司 | Heat dissipating structure of cylinder head of engine of chain type motorcycle |
| CN202228202U (en) * | 2011-09-17 | 2012-05-23 | 常州坛柴机电有限公司 | Cooling air channel structure for single-cylinder air-cooling air cylinder cover |
| CN202954892U (en) * | 2012-11-29 | 2013-05-29 | 河南创世电机科技有限公司 | Cylinder cover for general small-size gasoline engine |
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- 2012-11-29 CN CN201210496361.0A patent/CN102926885B/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN102926885A (en) | 2013-02-13 |
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