Engine lubrication system with anti-siphon device

Abstract

The invention relates to the technical field of aero-engine lubrication systems, and particularly provides an engine lubrication system with an anti-siphon device. In an engine stop state, a sealing valve of the anti-siphon device is closed, and the anti-siphon function is achieved. Due to the fact that the anti-siphon device can cut off a lubricating oil path, the disassembling and maintaining work of a lubricating oil accessory can be carried out without draining off oil tank lubricating oil. When an engine works, a scavenging pump only needs to suck a small amount of lubricating oil in a bearing cavity and a pipeline to enter a sealing cavity between an opening valve of the anti-siphon device and a shell, the sealing valve is opened, an oil suction path between a lubricating oil tank and an oil supply pump is brought in operation, and normal work of the lubrication system is guaranteed. When the anti-siphon device works, the oil supply pump is free of efficiency losses.

Description

Technical field [0001] The invention relates to the technical field of aeroengine lubrication systems, in particular to an engine lubrication system with an anti-siphon device. Background technique [0002] During the parking process of an aero engine after parking, the oil in the oil tank is sometimes drawn into the engine bearing cavity and accessory casing through the pipeline and nozzle due to the siphon phenomenon, which affects the evaluation of the oil consumption, and even leaks into the air flow. Contamination occurs in the channel, therefore, the lubrication system needs to be equipped with an anti-siphon device. [0003] The existing anti-siphon device of the engine lubrication system has the following defects: [0004] 1. The siphon pipe is led out from the highest point of the oil supply road, the pipeline is longer, and the system weight increases; [0005] 2. The lubricating oil flowing through the anti-siphon device does not enter the engine lubricating oil main circu...

AI Technical Summary

Problems solved by technology

[0004] 1. The siphon pipeline is led out from the highest point of the oil supply line, the pipeline is longer, and the weight of the system increases;

[0005] 2. The lubricating oil flowing through the anti-siphon device does not enter the main oil circulation system of the engine, which reduces the efficiency of the oil supply pump;

[0006] 3. When decomposing the lubricating oil accessories, it is necessary to drain all the lubricating oil in the lubricating oil tank, resulting in increased maintenance work and a large amount of lubricating oil loss

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