Lubricating oil return filter with one-way valve

Abstract

The invention belongs to the field of aeroengine mechanical systems, and discloses a lubricating oil return filter with a one-way valve. The lubricating oil return filter with the one-way valve is formed by a joint, a one-way valve assembly, a valve seat, an adapter seat, a filter element, a shell, a mouthpiece, an end cover and a spring. An integrated matching form of the one-way valve assembly and the oil filter is adopted, when lubricating oil pressure exceeds a spring force, the valve is opened, and when no lubricating oil pressure exists or the pressure is insufficient to counteract the spring force, the valve is closed, so that the purpose of one-way working of the valve is achieved, and reverse lubricating oil is prevented from entering aircraft accessories; and through the oil filter, lubricating oil generated after aircraft accessories work can directly return to an engine lubricating oil tank after being filtered, the structure is simplified, the weight is reduced, and reliability is improved. When the valve seat is designed, a semicircular polishing limiting structure is adopted to be in contact sealing with rubber on the one-way valve assembly, so that the damage probability of the rubber is reduced, and the service life is greatly prolonged; and the design of maximizing the flow area of the lubricating oil is adopted, so that the flow resistance is reduced, and thehazard risk caused by unsmooth oil return in the aircraft accessories is reduced.

Description

Technical field [0001] The invention belongs to aeronautical engine mechanical systems direction, to adjust the filtering of a one-way valve back to the oil filter with oil, the oil used. Background technique [0002] Aero-engine aircraft accessory gearboxes and other aircraft are usually equipped with a starter accessories. After attachment work plane, which requires the lubricating oil back to the engine cooling oil tank, when oil is directly returned to the oil tank, the oil back to the oil flow passage, the oil back to the oil filter needs to be designed with a one-way control valves. An aircraft accessory is designed in a conventional manner separate lubrication system, the lubricating oil or aircraft accessories directly back to the aircraft engine accessory drive gearbox return to the oil tank, either way bring many problems, such as a separate lubrication system designed to increase the weight while the structure is more complex, reducing the reliability. Lubricating oil ...

AI Technical Summary

Problems solved by technology

The seal of the valve seat and the rubber are compressed for a long time under the action of the spring. If the fillet of the seal is too small, the rubber will be over-extruded and deformed over time, resulting in seal failure. If the fillet of the seal is too large, the contact area will be too large. , can not form a compression seal, and will also cause seal failure

[0003] For a certain type of engine, since the position of the oil tank is higher than the oil return port of the starter, without a one-way valve, the oil will flow into the starter in the reverse direction, resulting in too much oil in the starter, and it is easy to Cause safety problems such as starter fire and smoke

At the same time, the lubricating oil after the starter works may contain foreign matter such as non-metallic impurities. If these foreign matters directly enter the lubricating oil tank, it will cause adverse effects on the oil supply system of the engine. Only conventional oil filters or conventional one-way valves are used. It cannot meet the requirements of use; some technicians in the field also try to use the oil filter directly in series with the one-way valve. Although the problems of lubricating oil filtration and backflow prevention have been solved during use, the structure of the series oil filter is complicated and heavy, which is inconvenient. Maintenance and control, but because the engine has extremely high requirements on weight control, it is necessary to design a more streamlined integrated oil filter structure

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