| 龙小辉1，孟现召2.某型航空活塞发动机空中气门卡阻机理[J].航空发动机,2019,45(4):9-15 |
| 某型航空活塞发动机空中气门卡阻机理 |
| Mechanism of Exhaut Valve Sticking of a Certain Aero Piston Engine |
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| DOI： |
| 中文关键词: 气门卡阻 温度剧变 EGView 软件 燃油流量 航空活塞发动机 |
| 英文关键词:valve sticking temperature upheaval EGView software fuel flow aero piston engine |
| 基金项目:中国民用航空飞行学院成果转化与创新基金（CJ2018-04）资助 |
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| 中文摘要: |
| 针对某型航空活塞发动机在运行中多次出现的空中气门卡阻故障，结合该型发动机的结构设计和实际运行环境，对故
障发动机气门导套内沉积物的成分进行分析，并基于EGView 软件对故障案例的FDR 数据进行分析，结果表明：温度剧变导致气门
- 导套间有效配合间隙减小是导致空中气门卡阻的根本原因；在飞行中，在30%功率附近燃油流量偏小是导致温度剧变的主要原
因。据此提出了增加发动机30%功率附近燃油流量的解决方案，给出了推荐的下限阈值为17.0 L/h，经实践验证该排故方案有效。 |
| 英文摘要: |
| In view of the air valve sticking faults that occured many times in the operation of a certain type of aero piston engine，the
component of the sediment in the valve guide sleeve of the faulty engine was analyzed based on the structural design of the engine and the
actual operating environment. The FDR data of the fault case was analyzed based on the EGView software. The results show that the
reduction of effective fit clearance between valve and guide sleeve due to the temperature upheaval is the fundamental cause of air valve
sticking. In flight，the small fuel flow near 30% power is the main cause of temperature upheaval. A solution to increase the fuel flow near
30% power of the engine is proposed，and the recommended threshold is 17.0 L / h. It is proved by practice that the proposed scheme is
effective. |
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