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An integrated bearing support structure

A bearing support and bearing technology, which is applied to the rigid bracket of bearing components, bearing components, shafts and bearings, etc., can solve the problems of difficult processing of engine pipelines, burning out and preheating fuel pipes, increasing size and weight, etc. The effect of ensuring the injection angle and injection quantity, improving the lubrication reliability and reducing the working temperature

Active Publication Date: 2017-06-20
中科航星科技股份有限公司
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

The first method preheats the fuel while reducing the temperature of the lubricating oil, which kills two birds with one stone, but requires a complex and heavy heat exchanger, increases the size and weight and increases the cost, and is not suitable for small turbojet engines; the second method is simple and effective. It can significantly increase the temperature of hot oil, but it will cause difficulties in engine pipeline processing and complicated installation. In addition, the temperature in the combustion chamber is too high. Long-term use may burn out the preheating fuel pipe

Method used

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Embodiment Construction

[0025] The present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that the specific examples described are only intended to facilitate the understanding of the present invention, and have no limiting effect on it. It should be noted that, in the drawings or descriptions of the specification, similar or identical parts all use the same figure numbers. Implementations not shown or described in the accompanying drawings are forms known to those of ordinary skill in the art.

[0026] Such as figure 1 As shown, the present invention provides an integrated bearing support for a small turbojet engine. The bearing support 4 is used as an engine 0-2-0 rotor support structure, the center of which passes through the engine shaft 1, and is concentric with the bearing support 4 . The bearing 6 is installed on the inner ring of the bearing support 4, and the assembly relationship is an interference fit. The turbine guide 5 is...

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Abstract

The invention discloses an integral bearing support structure, and belongs to the technical field of small turbojet engine for aviation. An annular cavity is arranged on an original bearing support body; through the fuel oil pipeline and pipe joint introduced from the annular cavity, the fuel oil, which is supplied to the combustion chamber by an engine, is introduced into the annular cavity in advance, and at the same time a bearing lubricant nozzle is arranged in the annular cavity. The fuel oil that is introduced into the annular cavity can carry out sufficient heat exchange with the hot-end components of the engine, the preheating of fuel oil and cooling of bearing are both achieved effectively, and moreover, the provided lubricant nozzle arranged in the annular cavity enhances the lubricating effect on bearing. The provided integral bearing support structure can be directly applied to a small turbojet engine adopting a 0-2-0 bearing structure. The functions of fuel oil preheating, bearing cooling, and lubricating effect enhancement can be achieved without increasing the size and weight of an engine; furthermore, the combustion efficiency of engine is prominently improved, and the service life of engine is prolonged.

Description

technical field [0001] The invention relates to an integrated structure of a bearing support with a fuel preheating ring cavity and capable of realizing effective lubrication, which is especially suitable for small turbojet engines for unmanned aerial vehicles and bombs. Background technique [0002] The small turbojet engine is mainly used as the power device of UAV and subsonic cruise missile. It pursues high thrust ratio and low cost, and requires the structure to be as simple as possible under the premise of meeting the functional requirements. Therefore, most small turbojet engines have abandoned the complex lubricating oil system, and adopted the method of integrating fuel and lubricating oil and directly lubricating the bearing with fuel, that is, a thin oil pipe drawn from the main fuel line is welded on the bearing support, and fuel is injected to lubricate the bearing. Although this lubrication method is simple, it is difficult to ensure the welding process of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02C7/06F02C7/224F16C35/00
CPCF02C7/06F02C7/224F16C35/00
Inventor 龚建波黄恩亮雷志军郭磊
Owner 中科航星科技股份有限公司
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