CN110925096A - Engine lubricating oil cooling system - Google Patents
Engine lubricating oil cooling system Download PDFInfo
- Publication number
- CN110925096A CN110925096A CN201911234970.7A CN201911234970A CN110925096A CN 110925096 A CN110925096 A CN 110925096A CN 201911234970 A CN201911234970 A CN 201911234970A CN 110925096 A CN110925096 A CN 110925096A
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- China
- Prior art keywords
- lubricating oil
- oil
- radiator
- fuel
- engine
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/12—Cooling of plants
- F02C7/14—Cooling of plants of fluids in the plant, e.g. lubricant or fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/06—Arrangements of bearings; Lubricating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/20—Mounting or supporting of plant; Accommodating heat expansion or creep
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/22—Fuel supply systems
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
The invention provides an engine lubricating oil cooling system, which comprises a lubricating oil tank, an air lubricating oil radiator, a fuel tank and a fuel pump, wherein the air lubricating oil radiator is arranged on the lubricating oil tank; the high-temperature return oil of the engine passes through an air lubricating oil radiator and then enters a fuel lubricating oil radiator for heat dissipation, and then enters a lubricating oil tank for recycling; the low-temperature fuel oil in the fuel tank is input into the fuel-lubricating oil radiator through the fuel pump to radiate the lubricating oil, and then enters the combustion chamber to be combusted. The lubricating oil cooling system provided by the invention adopts two types of radiators to cool the lubricating oil, and solves the problem that the high-altitude cruise type aircraft engine in a high-altitude low-speed state has small fuel flow and cannot meet the heat dissipation requirement of the lubricating oil system.
Description
Technical Field
The invention relates to the field of aircraft engines, in particular to an aircraft engine lubricating oil cooling system.
Background
In the working process of the lubricating oil system of the aero-engine, the lubricating oil cools parts such as engine bearings, gears and the like, and takes away heat generated by friction operation of the parts, so that the temperature of the lubricating oil is increased. For an aircraft engine, in order to ensure proper lubricating oil temperature, low-temperature fuel oil is adopted to cool high-temperature lubricating oil.
However, for high-altitude cruising type aircraft engines, the fuel flow is very small under the high-altitude low-speed state, the heat dissipation requirement of lubricating oil cannot be met, and the design difficulty of a lubricating oil cooling system is very large. Therefore, the oil system must seek other cooling and heat dissipation methods. At present, the technical introduction in the aspect is very little at home and abroad. Few engines adopt an air lubricating oil radiator to cool lubricating oil, but a cooling air source of the radiator comes from airplane ram bleed air, so that the aerodynamic performance and the stealth performance of the airplane are influenced.
Disclosure of Invention
The purpose of the invention is as follows: in order to solve the problems, the invention provides a scheme of 'a fuel oil radiator and an air oil radiator', which is used for solving the problem of insufficient oil heat dissipation caused by small fuel oil flow under the condition of high altitude and low speed of an aerial engine of an aerial cruise type.
Technical scheme
The invention provides an engine lubricating oil cooling system, which comprises a lubricating oil tank, an air lubricating oil radiator, a fuel tank and a fuel pump, wherein the air lubricating oil radiator is arranged on the lubricating oil tank;
the high-temperature return oil of the engine passes through an air lubricating oil radiator and then enters a fuel lubricating oil radiator for heat dissipation, and then enters a lubricating oil tank for recycling;
the low-temperature fuel oil in the fuel tank is input into the fuel-lubricating oil radiator through the fuel pump to radiate the lubricating oil, and then enters the combustion chamber to be combusted.
Two cooling media of 'fuel oil + air' are adopted to dissipate heat of the lubricating oil. An air lubricating oil radiator and a fuel lubricating oil radiator are arranged on the lubricating oil circulating loop and used for cooling high-temperature lubricating oil.
Furthermore, the air lubricating oil radiator comprises a core body, a front end cover, a bypass valve, a lubricating oil outlet, a lubricating oil inlet, a mounting edge and a rear end cover.
Furthermore, the core body of the air lubricating oil radiator comprises an upper side plate, a seal, a lower side plate, a cold side corrugated plate and a flat pipe;
the air lubricating oil radiator core is made of aluminum alloy.
Furthermore, when the flow resistance of the lubricating oil in the core body of the air lubricating oil radiator exceeds (45 +/-5) kPa, the lubricating oil does not pass through the core body, and directly flows to the lubricating oil outlet from the lubricating oil inlet through the bypass valve.
Furthermore, the air lubricating oil radiator is fixed on an engine culvert casing through a mounting edge.
The air lubricating oil radiator is arranged in an external culvert of the engine, and low-temperature gas in the external culvert flows through the outer surface of the radiator to cool high-temperature lubricating oil flowing in the radiator. The oil-fired radiator is installed outside the engine and cools oil using fuel oil.
Advantageous effects
The lubricating oil cooling system provided by the invention adopts two types of radiators to cool the lubricating oil, and solves the problem that the high-altitude cruise type aircraft engine in a high-altitude low-speed state has small fuel flow and cannot meet the heat dissipation requirement of the lubricating oil system.
According to the structure characteristics of the engine, the lubricating oil cooling system provided by the invention selects the air of the external culvert of the engine as the cooling medium of the air lubricating oil radiator, does not need to bleed air from the airplane, and does not influence the aerodynamic performance and the stealth performance of the airplane.
Drawings
FIG. 1 is a schematic diagram of an engine oil cooling system.
Fig. 2 is a schematic structural view of an air-lubricating oil radiator.
Fig. 3 is a structural diagram of an air lubricating oil radiator core.
FIG. 4 is a schematic view of a fuel oil radiator.
Fig. 5 is a schematic view showing the installation position of the air oil radiator.
Wherein: 1: a core body; 2: a front end cover; 3: a bypass valve; 4: a lubricant outlet; 5: a lubricating oil inlet; 6: installing edges; 7: a rear end cap; 8: an upper side plate; 9: a seal; 10: a lower side plate; 11: a cold-side corrugated plate; 12: flat tubes; 13: a lubricating oil inlet; 14: a lubricant outlet; 15: a fuel inlet; 16: a fuel outlet; 17: an air-lubricating oil radiator; 18: an engine outer culvert casing.
Detailed Description
The invention is further explained below with reference to the drawings:
as shown in FIG. 1, the cooling system for engine oil provided by the present invention comprises an oil tank, an air oil radiator, a fuel tank and a fuel pump;
the high-temperature return oil of the engine passes through an air lubricating oil radiator and then enters a fuel lubricating oil radiator for heat dissipation, and then enters a lubricating oil tank for recycling;
high-temperature fuel in the fuel tank is input into the fuel oil radiator through the fuel pump to radiate the fuel, and then is input into the combustion chamber through the main fuel pump to be combusted.
As shown in fig. 2, which is a schematic structural diagram of an air-lubricating oil radiator, the air-lubricating oil radiator includes a core body 1, a front end cover 2, a bypass valve 3, a lubricating oil outlet 4, a lubricating oil inlet 5, a mounting edge 6, and a rear end cover 7.
Fig. 3 is a schematic structural diagram of an air oil radiator core. The radiator core body comprises an upper side plate 8, a seal 9, a lower side plate 10, a cold side corrugated plate 11 and a flat pipe 12; core 1 is the aluminum alloy material, and core 1 is 17 layers (hot limit 8 layers, cold limit 9 layers) altogether, and wherein cold limit buckled plate 11 chooses for use the foil stamping forming that 0.15mm is thick, and flat 12 specifications are 32 x 3.2mm, and core 1 guarantees sealed and the intensity requirement through brazing. When the oil flow resistance in the core body 1 exceeds (45 +/-5) kPa, the oil does not pass through the core body and directly flows to the oil outlet 4 from the oil inlet 5 through the bypass valve 3.
Fig. 4 is a schematic structural diagram of a core of a fuel oil radiator. The oil flowing out from the oil outlet 5 of the air oil radiator flows into the radiator from the oil inlet 13, flows around the inside, and then flows out from the oil outlet 14. The fuel passing through the fuel booster pump flows into the radiator through the fuel inlet 15, flows around the inside, and flows out through the fuel outlet 16. Inside the lubricating oil burning radiator, the low temperature fuel oil completes the second cooling of the high temperature lubricating oil.
Fig. 5 is a schematic view showing the installation position of the air oil radiator. The air-lubricating oil radiator 17 is fixed to an engine outer culvert casing 18 through a mounting edge 3. The bypass gas flows through the outer surface of the radiator to cool the high-temperature lubricating oil flowing in the radiator. The high temperature oil completes the primary cooling inside the air oil radiator.
Claims (5)
1. An engine lubricating oil cooling system is characterized in that the cooling system comprises a lubricating oil tank, an air lubricating oil radiator, a fuel tank and a fuel pump;
the high-temperature return oil of the engine passes through an air lubricating oil radiator and then enters a fuel lubricating oil radiator for heat dissipation, and then enters a lubricating oil tank for recycling;
the low-temperature fuel oil in the fuel tank is input into the fuel-lubricating oil radiator through the fuel pump to radiate the lubricating oil, and then enters the combustion chamber to be combusted.
2. The engine oil cooling system of claim 1, wherein the air-oil radiator comprises a core, a front end cover, a bypass flap, an oil outlet, an oil inlet, a mounting rim, and a rear end cover.
3. The engine oil cooling system of claim 2, wherein the core comprises an upper side plate, a seal, a lower side plate, a cold side corrugated plate, and a flat tube;
the radiator core is made of aluminum alloy.
4. The engine oil cooling system according to claim 3, wherein when the flow resistance of the oil in the air-oil radiator core exceeds (45 ± 5) kPa, the oil flows directly from the oil inlet to the oil outlet through the bypass shutter without passing through the core.
5. The engine oil cooling system of claim 1, wherein the air oil radiator is secured to an engine outer culvert casing by a mounting flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911234970.7A CN110925096A (en) | 2019-12-05 | 2019-12-05 | Engine lubricating oil cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911234970.7A CN110925096A (en) | 2019-12-05 | 2019-12-05 | Engine lubricating oil cooling system |
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| Publication Number | Publication Date |
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| CN110925096A true CN110925096A (en) | 2020-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911234970.7A Pending CN110925096A (en) | 2019-12-05 | 2019-12-05 | Engine lubricating oil cooling system |
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| CN (1) | CN110925096A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111535927A (en) * | 2020-05-09 | 2020-08-14 | 贵州永红航空机械有限责任公司 | Lubricating oil filtering double-valve type lubricating oil burning radiator |
| CN111852658A (en) * | 2020-07-24 | 2020-10-30 | 贵州永红航空机械有限责任公司 | High-temperature and high-pressure tube-shell type lubricating oil burning radiator |
| CN114151149A (en) * | 2021-10-20 | 2022-03-08 | 中国航发四川燃气涡轮研究院 | Gas turbine engine fuel oil heat management and anti-icing integrated control system |
| CN114704382A (en) * | 2022-04-24 | 2022-07-05 | 中国航发沈阳发动机研究所 | Aircraft engine thermal management method and architecture |
| CN115108033A (en) * | 2022-05-30 | 2022-09-27 | 中国航空工业集团公司沈阳飞机设计研究所 | Aircraft fuel oil heat sink dynamic control system |
| CN115571349A (en) * | 2022-11-10 | 2023-01-06 | 上海尚实航空发动机股份有限公司 | Integrated lubricating oil supply system of aircraft auxiliary power device and aircraft |
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| CN109441589A (en) * | 2018-12-14 | 2019-03-08 | 中国航空工业集团公司西安飞机设计研究所 | A kind of tandem oil cooler unit |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111535927A (en) * | 2020-05-09 | 2020-08-14 | 贵州永红航空机械有限责任公司 | Lubricating oil filtering double-valve type lubricating oil burning radiator |
| CN111535927B (en) * | 2020-05-09 | 2021-03-16 | 贵州永红航空机械有限责任公司 | Lubricating oil filtering double-valve type lubricating oil burning radiator |
| CN111852658A (en) * | 2020-07-24 | 2020-10-30 | 贵州永红航空机械有限责任公司 | High-temperature and high-pressure tube-shell type lubricating oil burning radiator |
| CN111852658B (en) * | 2020-07-24 | 2021-05-18 | 大连理工大学 | High-temperature and high-pressure tube-shell type lubricating oil burning radiator |
| CN114151149A (en) * | 2021-10-20 | 2022-03-08 | 中国航发四川燃气涡轮研究院 | Gas turbine engine fuel oil heat management and anti-icing integrated control system |
| CN114704382A (en) * | 2022-04-24 | 2022-07-05 | 中国航发沈阳发动机研究所 | Aircraft engine thermal management method and architecture |
| CN115108033A (en) * | 2022-05-30 | 2022-09-27 | 中国航空工业集团公司沈阳飞机设计研究所 | Aircraft fuel oil heat sink dynamic control system |
| CN115108033B (en) * | 2022-05-30 | 2024-05-17 | 中国航空工业集团公司沈阳飞机设计研究所 | Dynamic control system for aircraft fuel heat sink |
| CN115571349A (en) * | 2022-11-10 | 2023-01-06 | 上海尚实航空发动机股份有限公司 | Integrated lubricating oil supply system of aircraft auxiliary power device and aircraft |
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Application publication date: 20200327 |