Air-lubricating oil surface type radiator

A radiator and oil surface technology, which is applied in the field of air-sliding surface radiators, can solve the problems of large thermal resistance on the oil side and poor heat dissipation effect of air-sliding radiators, and achieve low thermal resistance and good comprehensive heat exchange Performance, the effect of improving the cooling effect

Pending Publication Date: 2019-11-08
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For surface radiators, the parallel lubricating oil channels and fins are the main body of heat dissipation. However, due to the high viscosity of the lubricating oil, the thermal resistance of the lubricating oil side is relatively large. Conventionally, only fins are added to enhance heat transfer. Therefore, the heat dissipation effect of the air-sliding radiator is not outstanding

Method used

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  • Air-lubricating oil surface type radiator
  • Air-lubricating oil surface type radiator
  • Air-lubricating oil surface type radiator

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] Such as figure 1 As shown, the lubricating oil radiator body 1 includes a heat exchange tube bundle 4 arranged by several heat exchange tubes 3 , and the outer wall of the heat exchange tube bundle 4 is provided with rectangular fins 2 . The heat exchange tube bundle 4 is annular. The lubricating oil radiator body 1 is mounted on a place with abundant cold air inlet, specifically mounted on the air intake section of the outer duct.

[0025] The outer diameter of the heat exchange tube 3 is D 0 , the inner diameter is D 3 , Wall thickness S, with obvious grain structure on the inner and outer walls of the tube, high-intensity heat exchange can be performed both inside and outside the heat exchange tube. The outer wall of the heat exchange tube 3 is provided with an axially developed axial keyway 5 , and the inner wall is provided with a fixed twist distance d...

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Abstract

The invention provides an air-lubricating oil surface type radiator. The inner wall of a heat exchange pipeline of the radiator is provided with rifled threads, and the outer wall surface of the heatexchange pipeline is provided with an axial key groove; and the radiator with an enhanced heat exchange structure is fixed at an air inlet of an engine outer duct and becomes a main radiator in an engine lubricating oil cooling system. According to the air-lubricating oil surface type radiator, by changing the shape of the heat exchange pipeline, the effective heat exchange areas inside and outside the pipeline and the turbulence degree of the flow of fluid inside and outside the pipeline are increased under the condition of minimizing the loss of the lubricating oil pressure inside the pipeline and guaranteeing the quality of the radiator, so that the thermal resistance of the inner wall of the pipeline is effectively reduced, and the integral heat exchange capacity of the radiator is effectively improved.

Description

technical field [0001] The invention relates to an air-lubricating surface type radiator which is applied to lubricating oil cooling of turbofan aeroengines with a large and medium bypass ratio and has enhanced heat exchange pipelines, and belongs to the air-lubricating surface type in the aeroengine lubricating oil system Radiator field. Background technique [0002] As the blood of an aero-engine, lubricating oil not only provides sufficient lubrication for the moving parts of the aero-engine, but also provides sufficient sealing and heat dissipation, so as to ensure the safe and stable long-term endurance of the aircraft engine under high-speed and high-temperature conditions. The performance and reliability of the lubricating oil system are directly related to the performance and reliability of the engine. Working in a high heat load environment, the temperature of the lubricating oil will also increase rapidly. The increase in temperature will cause the viscosity of th...

Claims

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Application Information

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IPC IPC(8): F23R3/02F28D1/04F28F1/36
CPCF23R3/02F28D1/04F28F1/36
Inventor 吴迪金峰
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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