CN107893708A - A kind of engine-cooling system of depopulated helicopter - Google Patents
A kind of engine-cooling system of depopulated helicopter Download PDFInfo
- Publication number
- CN107893708A CN107893708A CN201711276146.9A CN201711276146A CN107893708A CN 107893708 A CN107893708 A CN 107893708A CN 201711276146 A CN201711276146 A CN 201711276146A CN 107893708 A CN107893708 A CN 107893708A
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- Prior art keywords
- water
- inlet
- cylinder body
- cylinder
- engine
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- F02F1/02—Cylinders; Cylinder heads having cooling means
- F02F1/10—Cylinders; Cylinder heads having cooling means for liquid cooling
- F02F1/16—Cylinder liners of wet type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P3/02—Arrangements for cooling cylinders or cylinder heads
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
- F01P7/165—Controlling of coolant flow the coolant being liquid by thermostatic control characterised by systems with two or more loops
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- 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
- F02F1/02—Cylinders; Cylinder heads having cooling means
- F02F1/10—Cylinders; Cylinder heads having cooling means for liquid cooling
- F02F1/14—Cylinders with means for directing, guiding or distributing liquid stream
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P3/02—Arrangements for cooling cylinders or cylinder heads
- F01P2003/021—Cooling cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2050/00—Applications
- F01P2050/20—Aircraft engines
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a kind of engine-cooling system of depopulated helicopter, including the cylinder body water jacket being correspondingly arranged with the cylinder of engine, and the cylinder body water cavity being connected with each cylinder body water jacket, cooling water inlet is provided with the cylinder body water cavity；It is characterized in that, the bottom of the cylinder body water jacket has the water inlet being connected with the cylinder body water cavity, have in the water inlet and be horizontally arranged with dividing plate, water inlet is separated into upper runner and lower runner by the dividing plate, and the inlet area of the upper runner is more than the inlet area of the lower runner；Water inlet direction of the dividing plate along water inlet is inclined upwardly setting.The present invention has compact-sized, lighter in weight, and good cooling results, the cylinder body temperature difference is smaller, is advantageous to reduce the cylinder prepareding gap of engine piston and cylinder, reduces impact, the advantages that reduction engine noise.
Description
Technical field
The present invention relates to technical field of engines, in particular to a kind of engine-cooling system of depopulated helicopter.
Background technology
Because piston engine has small volume, in light weight, power per liter high and convenient operating maintenance simple in construction etc. is all
More advantages, and it is with short production cycle, cost is relatively low, thus be widely used in middle-size and small-size depopulated helicopter.With skill
The development of art, requirement more and more higher of the depopulated helicopter to power unit, engine reinforcing degree more and more higher, thermic load are more next
It is bigger, the air-cooled scheme of conventional entirety or cylinder body it is air-cooled/the segmented cooling scheme of cylinder cap water cooling has been difficult to existing
Unmanned plane produces effectively cooling with piston-mode motor.
The content of the invention
For above-mentioned the deficiencies in the prior art, the technical problems to be solved by the invention are：It is tight how a kind of structure is provided
Gather, lighter in weight, good cooling results, the cylinder body temperature difference is smaller, is advantageous to reduce the cylinder prepareding gap of engine piston and cylinder, reduces
Impact, reduce the engine-cooling system of the depopulated helicopter of engine noise.
In order to solve the above-mentioned technical problem, present invention employs following technical scheme：
A kind of engine-cooling system of depopulated helicopter, including the cylinder body water jacket being correspondingly arranged with the cylinder of engine, and
The cylinder body water cavity being connected with each cylinder body water jacket, cooling water inlet is provided with the cylinder body water cavity；Characterized in that, the cylinder body
The bottom of water jacket has the water inlet being connected with the cylinder body water cavity, has in the water inlet and is horizontally arranged with dividing plate, described
Water inlet is separated into upper runner and lower runner by dividing plate, and the inlet area of the upper runner is more than the lower runner
Inlet area；Water inlet direction of the dividing plate along water inlet is inclined upwardly setting.
Using said structure, after cooling water enters cylinder body water cavity from the cooling water inlet on cylinder body water cavity, pass through each cylinder
The water inlet of body water jacket enters cylinder body water jacket, because water inlet is separated into upper runner and lower runner, and upper shunting by dividing plate
The inlet area in road is more than the inlet area of lower runner so that and more cooling waters can be entered in runner, meanwhile,
Dividing plate is inclined upwardly settings along water inlet direction, certainly will make it that the discharge area of runner certainly will be less than the inlet face of upper runner
Product, be advantageous to increase coolant flow velocity, and coolant in the direction that the guide effect lower edge of dividing plate tilts upward around cylinder
Spiral enters cylinder head to the top of cylinder body water jacket.The inlet area of lower runner is less than discharge area so that cooling water
After, flow velocity reduces, and forms the relatively low current " quiescent centre " of flow velocity in the bottom of cylinder body water jacket, then with upper runner
Cylinder head is flowed upwardly into after coolant mixing.So, meet cylinder sleeve of engine HEAT TRANSFER LAW, fully combine cylinder body middle and upper part temperature
The characteristics of degree is higher, and bottom temp is relatively low so that the cooling water speed of cylinder base is slow, and water is small, and cooling velocity is slower, and
The cooling water speed of cylinder body middle and upper part is fast, and flow is big, can take away substantial amounts of heat, and cooling velocity is fast, cylinder body is carried out non-equal
Even cooling, compared with traditional uniform cooling, equal cooling effect can be realized using less total cooling water inflow, be advantageous to
Reduce cooling water load weight during unmanned helicopter flight.And slower cooling is used to the relatively low cylinder base of temperature
Speed, faster cooling velocity is used to the higher cylinder body middle and upper part of temperature, be advantageous to make the cylinder body each several part temperature phase after cooling
Difference is smaller, and the less temperature difference can cause the cylinder prepareding gap of engine piston and cylinder further to reduce, and is advantageous to reduce impact,
Noise is reduced, meets the high-revolving work requirements of unmanned vehicle engine.
Further, inlet valve water jacket and exhaust valve water jacket that engine cylinder covers, the inlet valve are arranged in addition to
Water jacket is connected with water hole on multiple inlet valve water jackets for being arranged at cylinder cap bottom；The exhaust valve water jacket is connected with multiple be arranged at
Water hole on the exhaust valve water jacket of cylinder cap bottom；Water hole is consistent with the shape in water hole on exhaust valve water jacket on the inlet valve water jacket,
And on the exhaust valve water jacket water hole quantity it is more than the quantity in water hole on inlet valve water jacket.
It is used to discharge combustion tail gas in engine because exhaust valve is primary so that the temperature of exhaust valve region compares air inlet
The temperature of door region is higher, in said structure, number of the quantity in water hole than water hole on inlet valve water jacket on exhaust valve water jacket
Amount is more so that is more entered in exhaust valve water jacket from the cooling water of cylinder body water jacket outflow, the exhaust valve institute higher to temperature
Stronger cooling is carried out in region.
Further, the one end of the dividing plate away from the cylinder body water cavity has the baffle plate being downwardly extending.
So, the cooling water that can be obstructed into lower runner using baffle plate is become what the outlet of lower runner flowed up
Gesture, be advantageous to the bottom for making cooling water enter cylinder body water jacket, form current " quiescent centre ".
Further, in addition to water pump, thermostat and radiator, the delivery port of the water pump and the cylinder body water cavity
Cooling water inlet is connected, and the water inlet of the thermostat is connected with the delivery port of engine cylinder cover；The low temperature of the thermostat goes out
The mouth of a river is connected to the water inlet of the water pump, and the high-temperature water outlet mouth of the thermostat is connected to the water inlet of the radiator；Institute
The delivery port for stating radiator is connected to the water inlet of the water pump.
So, high temperature coolant enters thermostat, and thermostat cools down flow portion according to temperature control or all flowed through scattered
Hot device, enter water pump after radiator outflow, coolant fully enters water pump by low temperature delivery port when temperature is less than certain value
To avoid engine supercooling, shorten warm-up period.
In summary, the invention has the advantages that：
1st, cylinder body top intensity of cooling is high, and inferior part of the cylinder block intensity of cooling is low, and non-homogeneous cooling effect meets cylinder sleeve of engine heat transfer
Rule.
2nd, the cylinder body top and the bottom temperature difference is small, can reduce piston cylinder prepareding gap, reduces impact, reduces noise, meets that unmanned plane is sent out
The high-revolving work requirements of motivation.
3rd, for the asymmetric porous honeycomb duct of engine optimization, realize that coolant is streamed and intensity of cooling control in water jacket
System, makes system architecture compact, in light weight, is adapted to aircraft applications.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment of the present invention.
Fig. 2 is the current schematic diagram of cylinder body water jacket（Arrow is water (flow) direction in figure）.
Fig. 3 is the structural representation of cylinder cap bottom（Arrow is water (flow) direction in figure）.
Fig. 4 is the structural representation of the water inlet of cylinder body water jacket.
Embodiment
With reference to embodiment, the present invention is described in further detail.
During specific implementation：As shown in Figure 1 to 4, a kind of engine-cooling system of depopulated helicopter, the engine are vertical
The cylinder four-stroke water cooling unmanned vehicle engine of Formula V type two, including the cylinder body water jacket 1 being correspondingly arranged with the cylinder of engine, with each cylinder
The connected cylinder body water cavity 2 of body water jacket 1, cooling water inlet is provided with the cylinder body water cavity 2；The bottom tool of the cylinder body water jacket 1
There is the water inlet being connected with the cylinder body water cavity 2, have in the water inlet and be horizontally arranged with dividing plate 3, the dividing plate 3 will enter water
Mouth is separated into runner and lower runner, and the inlet area of the upper runner is more than the inlet area of the lower runner；
Water inlet direction of the dividing plate 3 along water inlet is inclined upwardly setting.
Using said structure, after cooling water enters cylinder body water cavity from the cooling water inlet on cylinder body water cavity, pass through each cylinder
The water inlet of body water jacket enters cylinder body water jacket, because water inlet is separated into upper runner and lower runner, and upper shunting by dividing plate
The inlet area in road is more than the inlet area of lower runner so that and more cooling waters can be entered in runner, meanwhile,
Dividing plate is inclined upwardly settings along water inlet direction, certainly will make it that the discharge area of runner certainly will be less than the inlet face of upper runner
Product, be advantageous to increase coolant flow velocity, and coolant in the direction that the guide effect lower edge of dividing plate tilts upward around cylinder
Spiral enters cylinder head to the top of cylinder body water jacket.The inlet area of lower runner is less than discharge area so that cooling water
After, flow velocity reduces, and forms the relatively low current " quiescent centre " of flow velocity in the bottom of cylinder body water jacket, then with upper runner
Cylinder head is flowed upwardly into after coolant mixing.So, meet cylinder sleeve of engine HEAT TRANSFER LAW, fully combine cylinder body middle and upper part temperature
The characteristics of degree is higher, and bottom temp is relatively low so that the cooling water speed of cylinder base is slow, and water is small, and cooling velocity is slower, and
The cooling water speed of cylinder body middle and upper part is fast, and flow is big, can take away substantial amounts of heat, and cooling velocity is fast, cylinder body is carried out non-equal
Even cooling, compared with traditional uniform cooling, equal cooling effect can be realized using less total cooling water inflow, be advantageous to
Reduce cooling water load weight during unmanned helicopter flight.And slower cooling is used to the relatively low cylinder base of temperature
Speed, faster cooling velocity is used to the higher cylinder body middle and upper part of temperature, be advantageous to make the cylinder body each several part temperature phase after cooling
Difference is smaller, and the less temperature difference can cause the cylinder prepareding gap of engine piston and cylinder further to reduce, and is advantageous to reduce impact,
Noise is reduced, meets the high-revolving work requirements of unmanned vehicle engine.
During implementation, as shown in figure 3, also include being arranged on inlet valve water jacket 4 and exhaust valve water jacket 5 that engine cylinder covers,
The inlet valve water jacket 4 is connected with water hole on multiple inlet valve water jackets for being arranged at cylinder cap bottom；The exhaust valve water jacket 5 connects
There is water hole on multiple exhaust valve water jackets for being arranged at cylinder cap bottom；Water hole and water hole on exhaust valve water jacket on the inlet valve water jacket
Shape it is consistent, and on the exhaust valve water jacket water hole quantity it is more than the quantity in water hole on inlet valve water jacket.
It is used to discharge combustion tail gas in engine because exhaust valve is primary so that the temperature of exhaust valve region compares air inlet
The temperature of door region is higher, in said structure, number of the quantity in water hole than water hole on inlet valve water jacket on exhaust valve water jacket
Amount is more so that is more entered in exhaust valve water jacket from the cooling water of cylinder body water jacket outflow, the exhaust valve institute higher to temperature
Stronger cooling is carried out in region.
During implementation, the one end of the dividing plate 3 away from the cylinder body water cavity 2 has the baffle plate 6 being downwardly extending.
So, the cooling water that can be obstructed into lower runner using baffle plate is become what the outlet of lower runner flowed up
Gesture, be advantageous to the bottom for making cooling water enter cylinder body water jacket, form current " quiescent centre ".
During implementation, in addition to water pump 7, thermostat 8 and radiator 9, the delivery port of the water pump 7 and the cylinder body water cavity
2 cooling water inlet is connected, and the water inlet of the thermostat 8 is connected with the delivery port of engine cylinder cover；The thermostat 8 it is low
Warm delivery port is connected to the water inlet of the water pump 7, and the high-temperature water outlet mouth of the thermostat 8 is connected to entering for the radiator 9
The mouth of a river；The delivery port of the radiator 9 is connected to the water inlet of the water pump 7.
So, high temperature coolant enters thermostat, and thermostat cools down flow portion according to temperature control or all flowed through scattered
Hot device, enter water pump after radiator outflow, coolant fully enters water pump by low temperature delivery port when temperature is less than certain value
To avoid engine supercooling, shorten warm-up period.
Engine thermostat under high load capacity operating mode closes low temperature delivery port, whole high-temperature water input radiator is carried out cold
But, the water after cooling down enters cylinder cover water jacket into cylinder body water jacket by water pump by upper water hole, now, due to exhaust side cylinder body
Cylinder cap temperature is higher than air inlet side, and larger upper water hole carries out cooling down cylinder by more cooling waters to exhaust side cylinder block and head
Body cylinder cap temperature is uniform.Engine is opening low temperature delivery port compared with running on the lower load by thermostat, a part of high-temperature water
Water pump is sent directly into, another part after radiator cooling by being re-fed into radiator.After cooling water mixes with part high-temperature water
Cylinder body water jacket is sent into via water pump and then cylinder cover water jacket is entered by upper water hole, now, because exhaust side cylinder block and head temperature is high
In air inlet side, larger upper water hole carries out cooling down cylinder block and head temperature by more cooling waters to exhaust side cylinder block and head
Uniformly.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not limitation with the present invention, all in essence of the invention
All any modification, equivalent and improvement made within refreshing and principle etc., should be included in the scope of the protection.
Claims (4)
1. a kind of engine-cooling system of depopulated helicopter, including the cylinder body water jacket being correspondingly arranged with the cylinder of engine（1）,
And with each cylinder body water jacket（1）Connected cylinder body water cavity（2）, the cylinder body water cavity（2）On be provided with cooling water inlet；Its feature
It is, the cylinder body water jacket（1）Bottom have and the cylinder body water cavity（2）Connected water inlet, have in the water inlet
It is horizontally arranged with dividing plate（3）, the dividing plate（3）Water inlet is separated into upper runner and lower runner, the upper runner
Inlet area is more than the inlet area of the lower runner；The dividing plate（3）It is inclined upwardly setting along the water inlet direction of water inlet.
2. the engine-cooling system of depopulated helicopter as claimed in claim 1, it is characterised in that also include being arranged on starting
Inlet valve water jacket on machine cylinder cap（4）With exhaust valve water jacket（5）, the inlet valve water jacket（4）It is connected with and multiple is arranged at cylinder cap
Water hole on the inlet valve water jacket of bottom；The exhaust valve water jacket（5）It is connected with multiple exhaust valve water jackets for being arranged at cylinder cap bottom
Upper water hole；Water hole is consistent with the shape in water hole on exhaust valve water jacket on the inlet valve water jacket, and water on the exhaust valve water jacket
The quantity in hole is more than the quantity in water hole on inlet valve water jacket.
3. the engine-cooling system of depopulated helicopter as claimed in claim 1, it is characterised in that the dividing plate（3）It is remote
The cylinder body water cavity（2）One end there is the baffle plate that is downwardly extending（6）.
4. the engine-cooling system of depopulated helicopter as claimed in claim 1, it is characterised in that also including water pump（7）, section
Warm device（8）And radiator（9）, the water pump（7）Delivery port and the cylinder body water cavity（2）Cooling water inlet be connected, institute
State thermostat（8）Water inlet be connected with the delivery port of engine cylinder cover；The thermostat（8）Low temperature delivery port be connected to institute
State water pump（7）Water inlet, the thermostat（8）High-temperature water outlet mouth be connected to the radiator（9）Water inlet；It is described to dissipate
Hot device（9）Delivery port be connected to the water pump（7）Water inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711276146.9A CN107893708B (en) | 2017-12-06 | 2017-12-06 | A kind of engine-cooling system of unmanned helicopter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711276146.9A CN107893708B (en) | 2017-12-06 | 2017-12-06 | A kind of engine-cooling system of unmanned helicopter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107893708A true CN107893708A (en) | 2018-04-10 |
| CN107893708B CN107893708B (en) | 2019-11-29 |
Family
ID=61807570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711276146.9A Expired - Fee Related CN107893708B (en) | 2017-12-06 | 2017-12-06 | A kind of engine-cooling system of unmanned helicopter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107893708B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2727124A1 (en) * | 1977-06-16 | 1978-12-21 | Daimler Benz Ag | Cooling water jacket for IC engine - is divided into upper and lower sections of different cross sections |
| CN201209472Y (en) * | 2008-06-13 | 2009-03-18 | 安徽江淮汽车股份有限公司 | Cooling system of gasoline engine |
| CN202578929U (en) * | 2012-05-04 | 2012-12-05 | 宁波市鄞州德来特技术有限公司 | Water jacket for cylinder block |
| CN103511117A (en) * | 2013-09-18 | 2014-01-15 | 潍柴动力股份有限公司 | Diesel engine and cylinder head thereof |
| JP2016205355A (en) * | 2015-04-28 | 2016-12-08 | ダイハツ工業株式会社 | Cylinder block |
-
2017
- 2017-12-06 CN CN201711276146.9A patent/CN107893708B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2727124A1 (en) * | 1977-06-16 | 1978-12-21 | Daimler Benz Ag | Cooling water jacket for IC engine - is divided into upper and lower sections of different cross sections |
| CN201209472Y (en) * | 2008-06-13 | 2009-03-18 | 安徽江淮汽车股份有限公司 | Cooling system of gasoline engine |
| CN202578929U (en) * | 2012-05-04 | 2012-12-05 | 宁波市鄞州德来特技术有限公司 | Water jacket for cylinder block |
| CN103511117A (en) * | 2013-09-18 | 2014-01-15 | 潍柴动力股份有限公司 | Diesel engine and cylinder head thereof |
| JP2016205355A (en) * | 2015-04-28 | 2016-12-08 | ダイハツ工業株式会社 | Cylinder block |
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| Publication number | Publication date |
|---|---|
| CN107893708B (en) | 2019-11-29 |
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