半封闭单机双级螺杆压缩机的研究与研发

专业学学位位硕硕士士学学位位论论文半封闭单机双级螺杆压缩机的研究与研发ResearchandDevelopmentofASemi-hermeticCompoundtwoStageScrewCompressor作者姓名：张森工程领域：动力工程学号：41310014指导教师：权生林完成日期：2016.06大连理工学院DalianUniversityofTechnology大连交大大学学位博论文-I-摘要随着消费者支出的降低或者对生活品质提升的意愿单机双级螺杆压缩机，带动了冷链运输业的飞速发展。食品迅速冻结装置主要考量的诱因就是机组的能效问题及安全性难题。研发带有自主常识产权的半封闭单机双级螺杆压缩机以超过制冷压缩机运行的安全、稳定和节能要求具备重要项目含义。本设计探究首先采取一种齿条生成方式，设计了带有较高容量精度的双螺杆压缩机N型线双边不对称转子齿形。同时设计了齿数比、扭转角等几个重要结构参数，根据设计的压缩机转子几何参数进行了压缩过程热力计算，满足了设计规定。结合压缩机转子的构架特征，完成了单机双级螺杆压缩机总体加码方案，确定了电机冷却方法、能量调节模式、油路选择等几项重要内容。

利用改进计算的方式确认了吸入孔口和排出孔口的几何尺寸。其次，对转子受力状况、平衡活塞及轴承寿命进行计算，并借此为根据对转子轴的效率进行了标定计算。通过结构静力分析、模态分析和热结构谐振分析，利用有限元预测的方式对压缩机结构进行了改进设计，确认了压缩机设计构架的合理性。第三，制造了一台样机并组装了一台冷凝机组进行功耗试验，通过制冷量、输入电压等参数的检测，获得了螺杆压缩机的功耗系数。测试结果满足设计目标的设定，同国外产品性能进行非常可以看出，此次设计的单机双级螺杆压缩机接近了国际先进水准。本研究探讨了半封闭单机双级螺杆压缩机的设计计算方式，将一些新的观念和新的方式应用到探究和研发实例中，取得了很好的效果，可为以后的新压缩机产品研发提供借鉴和参考。关键词：半封闭单机双级螺杆压缩机；型线；转子；冷凝风机半封闭单机双级螺杆压缩机的研究与研发-II-ResearchandDevelopmentofASemi-hermeticCompoundtwoStageScrewCompressorAbstractWiththedevelopmentofconsumersincomeandthedemandforthequalityoflife,thecoldchainlogisticsindustryalsohasarapiddevelopment.ThemainconsiderationsoftheQuickFreezingDeviceforFoodaretheefficiencyandsafetyofthemachines.Theresearchofsemi-hermeticcompoundtwostagescrewcompressorwithindependentintellectualproperty,whichwillsatisfythesafe,stable,andenergy-savingrunningdemandofthecompressor,willexertgreatinfluenceonengineering.Thisdesignfirstworkoutamethodtoproductrack,thenitprojecttheTwin-screwCompressorrotorwiththeshapejustliketheletterNandthetwosidesarenotsymmetrical.Also,itdesignsomestructuralparameterssuchasthegearratioandthetorsionangle.Thenitmakethethermodynamiccalculationintheprocessofcompressingaccordingtotherotorparameters,whichturnouttomeetthedemandofthedesign.Italsocombinethestructuralfeatureoftherotortofinishthedesignschemeandtheoveralllayoutofthecompressor,accomplishthemotorcoolingmethod,energyregulation,oilcircuitdesignandotherimportantcontents.Thenitmakeoutthesizeofthesuction&dischargingholewiththemethodofoptimization.And,Inthispaper,theforceoftherotor,thebalancepistonandthebearinglifearecalculated,thenitchecktherotoraxleaccordingtothiscalculation.Withthestaticanalysis,modalanalysisandthermalstructurecouplinganalysis,thefiniteelementanalysisofthestructureofthecompressoriscarriedouttomakesurethedesignstructureofthecompressorisreasonable.Thenperformancetestofthecondensingunitusingthecompressorprototypeiscarriedout,andtheperformanceparametersofthescrewcompressorarederivedfromthemeasuredparameters,suchasrefrigerationcapacity&shaftpower.Thetestresultscansupportthedesigntarget,andcomparedwiththeperformanceoftheproductfromothercountries,wecanconcludethatthisdesignofsemi-hermeticcompoundtwostagescrewcompressorhasapproachedtheadvantagedlevelacrosstheworld.Thisstudydescribethedesignandcalculationmethodofthesemi-hermeticcompoundtwostagescrewcompressor,andapplysomenewthoughtsandmethodstotheactualengineering,whichturnouttobewell,andwillProvidereferenceforthefuturedevelopmentofnewcompressorproducts.大连交大本科学位博论文-III-profile;rotor;condensingunitKeyWords：semi-hermeticcompoundtwostagescrewcompressor半封闭单机双级螺杆压缩机的研究与研发-IV-目录摘要.............................................................................................................................IAbstract..............................................................................................................................II1绪论..............................................................................................................................11.1选题背景............................................................................................................11.2螺杆压缩机中国外研究现状............................................................................21.2.1国内研究状况............................................................................................21.2.2国外研究状况............................................................................................31.3本课题主要探究的内容与含义........................................................................42压缩机设计过程..........................................................................................................62.1压缩机设计载荷选取........................................................................................62.2转子参数设计....................................................................................................62.2.1型线的选用.............................................................................................62.2.2齿数比的选择.........................................................................................82.2.3扭转角的选择.........................................................................................92.2.4啮合间隙的确认.....................................................................................92.2.5转子几何参数选取...............................................................................102.2.6转子参照点的确认...............................................................................122.3压缩机方案与结构设计..................................................................................132.3.1压缩机设计细则及总体加码...............................................................132.3.2压缩机主要几何结构确定...................................................................162.4热力计算..........................................................................................................202.5压缩机图纸......................................................................................................253关键组件受力预测与校核计算................................................................................293.1轴和轴承的受力计算......................................................................................293.1.1转子轴的受力计算...............................................................................293.1.2平衡活塞受力计算...............................................................................303.1.3轴承寿命计算.......................................................................................313.2轴的密度计算与平键的校核计算..................................................................323.2.1轴的效率计算.......................................................................................323.2.2平键的校核计算...................................................................................35大连交大大学学位博论文-V-4压缩机有限元预测....................................................................................................374.1静力分析方案确定..........................................................................................374.1.1方案确定...............................................................................................374.1.2计算工况...............................................................................................384.1.3材料属性...............................................................................................384.2结构静力分析..................................................................................................384.2.1压缩机结构预测...................................................................................384.2.2模型网格划分.......................................................................................384.2.3边界条件...............................................................................................394.2.4计算结果...............................................................................................404.3模态分析..........................................................................................................444.3.1几何模型构建.......................................................................................444.3.2模态分析结果.......................................................................................444.3.3分析总结...............................................................................................504.4关键组件热结构耦合分析..............................................................................504.4.1低压级机体热结构谐振分析...............................................................514.4.2高压级机体热结构谐振分析...............................................................585试验............................................................................................................................665.1样机试验系统..................................................................................................665.2试验、分析及对比..........................................................................................675.2.1试验.......................................................................................................675.2.2结果预测...............................................................................................685.2.3产品性能对比.......................................................................................69结论..........................................................................................................................70致谢..........................................................................................................................74大连交大本科学位论文版权使用授权书.......................................................................75大连交大大学学位博论文-1-1绪论1.1选题背景随着消费者支出的降低或者对生活品质提升的意愿，带动了冷链运输业的迅猛发展。

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