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1、我国航空发动机改进改型工作的回顾与展望（ReviewandProspectofimprovedmodificationofaeroenginesinChina）ReviewandProspectofimprovedmodificationofaeroenginesinChinaTheconstructionofChina'saviationindustryhasbeen40years,aviationengineindustryafter40yearsofhardconstruction,repair
2、,fromimitationtoselfdesign,initiallyformedahigh-techindustrywithaconsiderablescale;hasacertainleveloffactoriesandresearchinstitutes,equippedwithadvancedproductionequipmentandtestingmeansfortodesignandlayagoodfoundationformanufacturing.Inthepast40years,m
3、orethan50typesofengineshavebeendeveloped,ofwhichmorethan20typeshavebeenestablished,andnearlyxmillionengineshavebeenprovidedformilitaryandcivilianaircraft,mostofwhichareimprovedretrofitproducts.Notonlyimprovestheperformanceandreliabilityoftheengine,prolo
4、ngsthelifespan,meetsthedomesticdemand,butalsoexportsabroadandcreatesveryhigheconomicbenefits.Forexample,LiYangcompanyhasinvested30millionyuanin10years,andhasconstantlyimproveditsmodificationanddevelopment,producing12batchesandnearly900engines.Ithasbecom
5、ethemainproductionbaseforthemaintypesofactiveserviceinourcountry.Andexports600units,earning350millionU.S.dollars,whileexercisingandstabilizingtheteam,andenhancethevitalityoftheenterpriseitself.Inourcountry,greatachievementshavebeenmadeinenginemodificati
6、on,buttherearestillmanyproblems.Lookingforwardto2000,thenewlydevelopedmodelsofourcountrycannotbefinalizedandputintoproduction,formingcombateffectiveness.Thepowerunitformilitaryandcivilianaircraftstillreliesmainlyonimprovedretrofitofexistingengines.There
7、fore,theimprovementofenginemodificationhasitsspecialsignificanceintheengineindustry.Two,enginemodification,roleandpositionintheindustry.MinistryofAviationIndustryissuedin1988Hangfa(88)No.50engineresearchanddevelopmentmanagementInterimProvisions"pointedo
8、ut:themodificationandimprovementofmaintaskistousethedevelopment,useanddevelopmentisthefinalstageofthewholeprocessofengineresearchanddevelopment.Theengineisaconstantlyimprovingandimprovingtheprocess;theengineimprovementisthedefect
