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Fuel oil and lubricating oil heat exchanger of light aircraft engine

A technology for aero-engines and heat exchangers, applied in engine lubrication, indirect heat exchangers, engine components, etc., can solve the problems of difficult processing, heavy heat exchangers, high density, etc., and achieve high fin efficiency and high heat transfer The effect of areal density

Inactive Publication Date: 2010-06-09
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, these steel pipes bring great difficulties to processing. On the other hand, due to the high density of steel, the heat exchanger is very heavy.

Method used

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  • Fuel oil and lubricating oil heat exchanger of light aircraft engine
  • Fuel oil and lubricating oil heat exchanger of light aircraft engine

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Embodiment Construction

[0018] A light-duty aero-engine lubricating oil / fuel heat exchanger, which is composed of many aluminum sheets (or copper sheets) with the same structure and a thickness of 0.2-0.4mm stacked on top of each other to form the core of the heat exchanger. According to the fuel flow and resistance requirements, the core can be divided into several fuel and lubricating oil passages, such as figure 1 In the illustrated embodiment, there is one lubricating oil passage and two fuel passages. There are lubricating oil inlet and outlet joints corresponding to the lubricating oil passage on the box body, and fuel oil inlet and outlet joints corresponding to the fuel passage.

[0019] see figure 1 The preferred implementation example of the utility model shown.

[0020] The lubricating oil that needs to be cooled is introduced into the lubricating oil channel 7 (14) of the heat exchanger core through the lubricating oil inlet joint 19, and after exchanging heat with the sheet, it is coll...

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Abstract

The invention designs a light fuel / lubricant heat exchanger based on the basic principle of heat transfer theory, which is used for cooling aircraft engine oil to ensure the safe operation of the engine. Compared with the conventional the fuel / lubricant heat exchanger, the fuel / lubricant heat exchanger of the invention has the advantages of small size, light weight and high heat exchange strength.The thin aluminum sheet (or copper sheet) with high coefficient of thermal conductivity is folded to form the core of the heat exchanger. The thickness of metal sheet is around 0.2 to 0.4mm. Space length between two adjacent metal sheets is about 0.3 to 0.5mm. According to flow rate, the core is divided into a plurality of fuel galleries and lubricating oil galleries. And then, the whole core isput into a pressure-proof tank. When the exchanger is in use, the lubricating oil with high temperature passes heat to the metal sheet positioned on the lubricating oil side by the means of convectionheat. And the heat continues to be passed to the metal sheet positioned on the fuel side by the means of heat conduction. Finally, the heat is passed to the fuel by the means of convection heat to cool the lubricating oil.

Description

technical field [0001] The invention relates to a light-duty aero-engine fuel / lubricating oil heat exchanger, which is used for cooling the lubricating oil in the aero-engine lubricating oil system to ensure safe and reliable operation of the aero-engine bearing lubricating system. The cooling medium is the fuel of the aero-engine, which can directly enter the combustion chamber of the engine for combustion after absorbing heat. It can be applied to various aero-engines that need to cool lubricating oil. Background technique [0002] Aeroengine is a device that provides power for various aircraft, and its own weight has an important impact on the performance index of the engine. Therefore, the restrictions on the weight of the engine and its various accessories are very strict. The lubricating oil / fuel heat exchanger is one of the main accessories of the aero-engine, and its purpose is to cool the high-temperature lubricating oil in the lubricating oil system of the aero-en...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02C7/224F02C7/06F28D7/00
Inventor 徐国强杜发荣丁水汀陶智韩树军王彬
Owner BEIHANG UNIV
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