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1、中国机械工程第21卷第12期2010年6月下半月基于键合图法的新型减压器金属波纹膜片分析翟暋华111221暋钟华勇暋孙运东暋刘中华暋赵迎春暋赵暋韩1.合肥工业大学,合肥,230009暋暋2.安徽江淮航空供氧制冷设备有限公司,合肥,230035摘要:通过对航天航空设备中新型减压器工作过程的分析,应用键合图法建立了减压器状态方程,仿真研究了金属波纹膜片载荷变化,基于龙格-库塔法进行了仿真计算,结果表明,减压器金属波纹膜片在工作初期承受21MPa高压,在0.06s后压力稳定在3.43MPa,在0.08s后活门位移稳定在3.165mm。建立了金属波纹膜片三维有限元模型,运用弹塑性有限元法分析了最大
2、工作载荷下金属波纹膜片的变形和应力,并运用Norton理论模型进行了高压下蠕变工作过程的仿真模拟。实验结果与有限元计算结果一致,表明现有设计方案在系统极端高压下,膜片发生弹塑性变形,在长期承受高压下,膜片将发生蠕变,但在1灡4256暳106s后最终稳定,不会影响其使用功能。该方法对新型减压器金属波纹膜片设计有一定指导意义。关键词:减压器;膜片;有限元;蠕变中图分类号:V432暋暋暋文章编号:1004—132X(2010)12—1418—06AnalysisofNewRelieveValveMetalCrinkleDiaphragmBasedonBondGraph111221ZhaiHua暋
3、ZhongHuayong暋SunYundong暋LiuZhonghua暋ZhaoYingchun暋ZhaoHan1.HefeiUniversityofTechnology,Hefei,2300092.AVICIJianghuaiAviationOxygenSupplyandRefrigerationEquipmentCo.Ltd.,Hefei,230035Abstract:Thepressvariationloadedonmetalcrinklediaphragmwasstudiedbasedonanalysisofthenewrelievevalveoperationprocess.Th
4、ebondgraphdescribedtherelievevalvedynamicfeaturewaspresentedtosetupthestatespaceequation,fromwhichthesimulationresultswerecalculatedbasedontheLunge-Kuttamethodstoexpressthatthecrinklediaphragmwillbeloaded21MPaatthebeginningoftherelievepressprocedure,andthepresswillbe3.43MPaafter0.06s,thevalvecores
5、pacewillbe3.165mmafter0.08s.Acrinklediaphragmsolidfiniteelementmodelwasbuiltup,andstressanddeformationwiththemaximalpress21MPawascomputed,andcreepprocesswassimulatedtoestimatethediaphragminvalidationornotaccordingtotheNortontheoreticmodel.Theexperimentalresultsarebetterconformabilitywiththesimulat
6、ionones.Theconclusionexpressesthatthenewcrinklediaphragmwillbeplasticdeformedwhenloadedon21MPa,andcreepafterlongtermhigherpress.Butthediaphragmwillbealsoavailableafterplasticdeformation,andthecreep6diaphragmdeformationandstresswillbestableloadedwith21MPaafter1.4256暳10s,andalsoworknormally.Thesimul
7、ationmethodoffersgoodhelptothenewrelievevalvedesign.Keywords:relievevalve;crinklediaphragm;finiteelementmethod;creep0暋引言传递函数并进行了MATLAB编程仿真。文献在航空航天系统中,减压器是重要的压力调[2]应用热力学和流体力学理论,基于工作气体在节部件。贮存于高压气瓶内的气体经减压器节流流过阀口或其他限
