周九来


摘要:燃油是发动机动力输出的源泉,燃油系统负责为发动机供应连续稳定精确计量的燃油,保证发动机的安全运转。作为我院主力训练机型,SR20飞机燃油系统故障率的高低不仅关乎飞行安全更直接影响飞行训练进度。本文从燃油系统工作原理入手,结合近年来该机型实际运行中的燃油系统故障案例,对该机型燃油系统进行全面的故障机理分析,整理故障现象、原因及排故调试方法,为后续该机型燃油系统维护提供便利。
Abstract: Fuel is the source of engine power output. The fuel system is responsible for supplying the engine with continuous and stable accurately measured fuel to ensure the safe operation of the engine.As the main training model of our hospital, the failure rate of SR20 aircraft fuel system not only affects the flight safety, but also directly affects the flight training schedule.In this paper, starting from the working principle of the fuel system, combined with the fuel system fault cases in the actual operation of this model in recent years, a comprehensive analysis of the fuel system fault mechanism of this model, sorting out the fault phenomenon, causes and troubleshooting methods, to provide convenience for the subsequent maintenance of this model's fuel system.
关键词:燃油系统;故障分析;调试
Key words: fuel system;fault analysis;commissioning
中图分类号:V26 文献标识码:A 文章编号:1674-957X(2021)07-0164-02
0 引言
燃油系統作为活塞发动机的重要工作系统,其性能的好坏直接影响发动机的正常工作。根据近年来SR20飞机燃油系统故障统计发现,常见的故障点有燃油流量偏大或小、慢车不稳或停车、发动机抖动、燃油流量指示问题、某缸EGT偏高、发动机功率损失,重则空中发动机停车,引发严重安全事故。本文以SR20飞机燃油系统为例,对燃油系统组成与原理进行简单介绍,结合实际运行中出现的燃油系统故障案例,对故障的现象、原因以及调试排除方法进行了全面的分析和总结,为后续该机型燃油系统维护提供便利。
1 SR20机型燃油系统的组成及工作原理
燃油系统是由燃油箱、电动增压泵、主燃油滤、驱动燃油泵、燃油计量装置、燃油流量传感器、燃油流量分配器、喷嘴组成。电动增压泵仅用于启动注油以及空中短时应对发动机不正常工作时……