某型航空活塞发动机排气门积铅机理

孟现召; 冯岩鹏

doi:10.13224/j.cnki.jasp.2020.08.003

某型航空活塞发动机排气门积铅机理

doi: 10.13224/j.cnki.jasp.2020.08.003

孟现召¹,
冯岩鹏²

基金项目: 中国民用航空飞行学院科学研究基金（J2019-041）

计量
- 文章访问数: 504
- HTML浏览量: 102
- PDF量: 480
- 被引次数: 0
出版历程
- 收稿日期: 2020-01-22
- 刊出日期: 2020-08-28

Mechanism of exhaust valve lead deposition at a certain aero piston engine

MENG Xianzhao¹,
FENG Yanpeng²

1.
Luoyang College,Civil Aviation Flight University of China,Luoyang Henan 471000,China
2.
Aviation Safety Information Division,China Academy of Civil Aviation Science and Technology,Beijing 100028,China

摘要

摘要: 针对某型航空活塞发动机在含铅汽油条件下因排气门积铅而出现严重的气缸压缩性衰减问题,通过对排气门上沉积物的微观形貌及成分分析,结合该型发动机的结构设计和实际运行环境分析这种排气门沉积物的形成机理.研究表明:空中慢车时排气门运行温度过低是导致污染物在排气门上沉积的根本原因,而空中慢车时的螺旋桨风车因素和该型发动机燃油系统设计特性是导致排气门运行温度过低的主要原因。据此提出将螺旋桨风车转速降低200 r/min和小功率调贫控制排气温度在427 ℃以上等提高气门运行温度的方案,经实际运行测试有效。
- 活塞发动机 /
- 气门积铅 /
- 气缸压缩性衰减 /
- 气门运行温度 /
- 螺旋桨风车转速 /
- 空中慢车
Abstract: In view of the serious problem of cylinder compressibility decay caused by exhaust valve lead deposited of during operation in the leaded aero gasoline condition at an aero-piston engine, based on analysis of the micro-morphology and composition of the lead deposited on exhaust valve, the formation mechanism of the pollutants on exhaust valve was analyzed in combination with the structure design and actual operating environment of this engine. Research shows that the excessive low temperature of valve operating is the fundamental cause of the pollutant deposition on the exhaust valve, and the propeller windmill factor and the design characteristic of the engine fuel system are the main reasons for the low temperature of the valve when the engine is in air idle condition. Based on this, a test scheme of reducing 200 r/min of the rotation speed of propeller in windmilling and leaning the mixture to control the exhaust gas temperature above 427 ℃ at low power status was proposed to increase the exhaust valve operating temperature, and was proved to be effective by the actual test.
- piston engine /
- exhaust valve lead deposition /
- ,cylinder compressibility decay /
- temperature of valve operating /
- ,rotation speed of propeller in windmilling /
- air idle

HTML

参考文献(23)

[1]	张洪涛,孟现召,冯岩鹏.某型航空活塞发动机排气门烧蚀机理［J］.航空动力学报,2015,30(9):2219-2225. ZHANG Hongtao,MENG Xianzhao,FENG Yanpeng.Principle of exhaust valve ablation at a certain aero piston engine［J］.Journal of Aerospace Power,2015,30(9):2219-2225.(in Chinese)
[2]	中国国家标准化管理委员会.航空活塞式发动机燃料:GB 1787-2018［S］.北京:中国质检出版社,2018:2.
[3]	Continental Motors Incorporated.IO-360 series engine maintenance and overhaul manual (supersedes X30594)［R］.Fairhope,US:Continental Motors Incorporated Company,2016.
[4]	钱璟,杨智渊,汪必耀.含铅汽油对航空活塞式发动机性能的影响探讨［J］.当代化工,2017,46(7):1473-1475. QIAN Jing,YANG Zhiyuan,WANG Biyao.The effect of leaded gasoline on performance of aviation piston engine［J］.Contemporary Chemical Industry,2017,46(7):1473-1475.(in Chinese)
[5]	刘玉科.使用高铅航空汽油的航空活塞发动机抖动故障原因初探［J］.中国民航飞行学院学报,2013,24(2):57-58. LIU Yuke.Discussion on piston engine shaking caused by high-lead aviation gasoline［J］.Journal of Civil Aviation Flight University of China,2013,24(2):57-58.(in Chinese)
[6]	徐小红,蔡进,薛群基,等.汽油芳烃对发动机沉积物的影响［J］.石油炼制与化工,2010,41(10):86-89. XU Xiaohong,CAI Jin,XUE Qunji,etal.Effect of aromatic hydrocarbon in gasoline on the formation of engine deposits［J］.Petroleum Processing and Petrochemicals,2010,41(10):86-89.(in Chinese)
[7]	马志豪,朱宇东,贾义,等.GDI发动机沉积物的FTIR及SEM/EDS分析［J］.内燃机学报,2017,35(4):332-337. MA Zhihao,ZHU Yudong,JIA Yi,et al.FTIR and SEM/EDS analyses of the deposits from a gasoline direct injection (GDI) engine［J］.Transactions of CSICE,2017,35(4):332-337.(in Chinese)
[8]	YE Z,MENG Q,MOHAMADIAN H P,et al.Investigation of deposit formation mechanisms for engine in-cylinder combustion and exhaust systems using quantitative analysis and sustainability study［J］.International Journal of Thermophysics,2007,28(3):1056-1066.
[9]	Garmin International Incorporated Company.Cirrus perspective line maintenance manual［M］.Olathe,US:Garmin International Incorporated Company,2013:60.
[10]	EG Trends Incorporated Company.Preflight the inside of your engine with EGView software［EB/OL］.［2020-01-06］.http:∥www.egtrends.com.
[11]	黄乙武.液体燃料的性质和应用［M］.北京:烃加工出版社,1985.
[12]	李汝辉,吴一黄.活塞式航空动力装置［M］.北京:北京航空航天大学出版社,2008.
[13]	ERNST G.Engine failure analysis-internal combustion engine failures and their causes［M］.New York:SAE International,2012.
[14]	肖永宁,潘克煜,韩国埏.内燃机热负荷和热强度［M］.北京:机械工业出版社,1988.
[15]	章熙民.传热学［M］.第6版.北京:中国建筑工业出版社,2014.
[16]	中国冶金百科全书总编辑委员会.中国冶金百科全书：金属材料［M］.北京:冶金工业出版社,2001.
[17]	刘星,司海青,蔡中长.飞行原理［M］.北京:科学出版社,2011.
[18]	于兵,边文超,张天宏,等.缸内直喷航空活塞发动机试验ECU平台设计［J］.电子器件,2013,36(3):377-382. YU Bing,BIAN Wenchao,ZHANG Tianhong,et al.ECU design of GDI aviation piston engines based on DSP［J］.Chinese Journal of Electron Devices,2013,36(3):377-382.(in Chinese)
[19]	胡春明,仲伟军,刘娜,等.航空活塞式发动机瞬态空燃比控制与实验研究［J］.燃烧科学与技术,2017,23(2):140-146. HU Chunming,ZHONG Weijun,LIU Na,et al.Experimental research of transient air-fuel ratio control of aviation piston engine［J］.Journal of Combustion Science and Technology,2017,23(2):140-146.(in Chinese)
[20]	黎艺华,胡东宁,胡春明,等.航空活塞式发动机空燃比实时控制算法［J］.航空动力学报,2014,29(5):1234-1241. LI Yihua,HU Dongning,HU Chunming,et al.Real time control algorithm of aviation piston engine air-fuel rato［J］.Journal of Aerospace Power,2014,29(5):1234-1241.(in Chinese)
[21]	马菲.塞斯纳172型飞机发动机失效后螺旋桨风车状态对飞行阻力的影响分析［J］.科学技术与工程,2011,11(30):7570-7572. MA Fei.Analysis of the windmilling effect to the drag of Cessna172 during engine failure［J］.Science Technology and Engineering,2011,11(30):7570-7572.(in Chinese)
[22]	姬芬竹,杜发荣,徐斌,等.航空用风冷活塞式发动机热状态研究［J］.内燃机工程,2014,35(1):35-40. JI Fenzhu,DU Farong,XU Bin,et al.Research on thermal state of air-cooled piston engine for aviation［J］.Chinese Internal Combustion Engine Engineering,2014,35(1):35-40.(in Chinese)
[23]	Cirrus Design Corporation.Airplane maintenance manual for the cirrus design SR20 (Reissue B8)［M］.Duluth,US:Cirrus Design Corporation,2017.