1、WWMBUCT163.COM电话:电话:15810260050北京化工大学北京化工大学2API 稳定性分析稳定性分析API Level II Stability Analysis NOT Required00.511.522.533.501234567Density(lbm/ft3)N/NCRAPI 617 Level I Stability Analysis Screening CriteriaRegion A-Level IAnalysis SufficientRegion B-Level IIAnalysis NeededC453If any of the following crite
2、ria apply a Level II stability analysis shall be performed:o Cross-Coupled Effects,Q0/QA2.0o Logarithmic Decrement,A 0.1o 2 Q0/QA 10 and CSR(N/NCR)is contained in Region BQA=Hp8866.7StageDcHcrho drho sqABc3 F1-1A19.531.8911.50871.33754.4899C63 E-1A20.461.4511.74511.50875.7275N11400 D-2E20.451.2282.0
3、091.74516.7388QA16.9562(Hp*Bc*C)/(Dc*Hc*N)*d/s)*1000Compressor Vibrations.August 2011 FORWARD AND BACKWARD MODE EXCITATION OF FLEXIBLE ROTOR SUPPORTED BY TILTING PAD BEARINGS NUMERICAL AND EXPERIMENTAL INVESTIGATIONProceedings of ASME Turbo Expo 2014:Turbine Technical Conference and ExpositionGT2014
4、June 16-20,2014,Dsseldorf,GermanyGT2014-26275Wang WeiminBeijing University of Chemical TechnologyBeijing,ChinaLi QihangBeijing University of Chemical TechnologyBeijing,ChinaGaoJinjiBeijing University of Chemical TechnologyBeijing,ChinaTimothy DimondRotor Bearing Solutions International,LLCCharlottes
5、ville,Virginia USAPaul AllaireUniversity of VirginiaCharlottesville,Virginia,USAEFFECT OF SPECIFIC LOAD OF BEARING ON THE CENTRIFUGAL COMPRESSOR ROTORDYNAMIC STABILITYProceedings of ASME Turbo Expo 2015:Turbine Technical Conference and ExpositionGT2015June 15-19,2015,Palais des Congres,CanadaGT2015-
6、42877Wang WeiminBeijing University of Chemical TechnologyBeijing,ChinaLi QihangBeijing University of Chemical TechnologyBeijing,ChinaLifangChen Beijing University of Chemical TechnologyBeijing,ChinaGaoJinjiBeijing University of Chemical TechnologyBeijing,ChinaPaul AllaireRotor Bearing Solutions Inte
7、rnationalCharlottesville,Virginia,USA主要内容 1 转子稳定性概述及发展现状转子稳定性概述及发展现状 2 转子稳定性识别方法转子稳定性识别方法 3 离心压缩机转子稳定性的改进措施离心压缩机转子稳定性的改进措施 4 转子稳定性技术研究展望转子稳定性技术研究展望转子转子稳定性概述及发展稳定性概述及发展现状现状Amplitude转子稳定性是离心压缩机向大型化发展过程中所面临的的主要主要障碍。压缩机用户、设计院、制造商以及研究人员都很关注。Roberto F.de Noronha,Katia Lucchesi Cavalca,Marcelo Accorsi Mira
8、nda,Edmund A.Memmott.STABILITY TESTING OF CO2 COMPRESSORS.43rd Turbomachinery&30th Pump Users Symposia,September 23-25,2014,Houston,TX转子转子稳定性概述及发展稳定性概述及发展现状现状Dressser-Rand 公司高压二氧化碳压缩机转子稳定性研究Shinichiro Tokuyama,Diogo Yoshikazu Ujihara,Akihiro Nakaniwa,Satoshi Saburi.DEVELOPMENT OF HIGH-PRESSURE RATIO
9、 AND WIDE-OPERATING RANGE 700BAR COMPRESSOR.43rd Turbomachinery&30th Pump Users Symposia,September 23-25,2014,Houston,TX日本三菱公司高压二氧化碳压缩机转子稳定性研究转子转子稳定性概述及发展稳定性概述及发展现状现状Takahashi,N.Magara,Y.,Narita,M.,and Miura,H.,2012,“ROTORDYNAMIC EVALUATION OF CENTRIFUGAL COMPRESSOR USING ELECTROMAGNETIC EXCITER”ASM
10、E Journal of Engineering for Gas Turbines and Power,134,p.032505.010020030040050010-210-1100-180-900901802nd Mode1st ModeAmplitude m/NFrequency Hz Forward BackwardPhase deg.日本日立公司转子稳定性研究转子转子稳定性概述及发展稳定性概述及发展现状现状C.P.Brian,C.H.Cloud,S.C.Rogerio,SHOP ACCEPTANCE TESTING OF COMPRESSOR ROTORDYNAMIC STABILI
11、TY AND THEORETICAL CORRELATION.Proceedings of the Thirty-Ninth Turbomachinery Symposium,Turbomachinery Laboratory,Texas A&M University,College Station,Texas,2010,pp.31-42.转子转子稳定性概述及发展稳定性概述及发展现状现状ELLIOTT 压缩机稳定性测试 采用工作模态分析方法(采用工作模态分析方法(OMA)对稳定性进行了分析。)对稳定性进行了分析。ASME TURBO 2014转子转子稳定性概述及发展稳定性概述及发展现状现状GE
12、公司的稳定性测试公司的稳定性测试对于转子稳定性分析所面临的挑战,我们进行了如下的研究,逐个突破对于转子稳定性分析所面临的挑战,我们进行了如下的研究,逐个突破:通过基于转子动力学理论的仿真分析,确认运用频域的频响函数方法(通过基于转子动力学理论的仿真分析,确认运用频域的频响函数方法(FRFs)可以有效的识别转子的一阶模态的对数衰减率。可以有效的识别转子的一阶模态的对数衰减率。.运用短时傅里叶变换运用短时傅里叶变换(STFT)可以消除其他不相关信号,而只保留相关信号,从可以消除其他不相关信号,而只保留相关信号,从而实验工程实际中的强噪声干扰工况。而实验工程实际中的强噪声干扰工况。.运用多输入多输出
13、(运用多输入多输出(MIMO identification)识别方法,运用两个支撑轴承处识别方法,运用两个支撑轴承处和激振器处的振动,可以有效的去除高阶模态的影响,从而避免模态混叠和激振器处的振动,可以有效的去除高阶模态的影响,从而避免模态混叠。当当陀螺效应的影响比较严重是陀螺效应的影响比较严重是,(,(dFRFs)方法可以方法可以有效的避免兄弟模态。有效的避免兄弟模态。1 W.Wang,Q.Li,F.He,&P.Allaire.Numerical and Experimental Stability Investigation of a Flexible Rotor on Two Diffe
14、rent Tilting Pad Bearing Configurations.Int.J.RotatingMach.(2014),http:/dx.doi.org/10.1155/2014/6979252 W.Wang,Q.Li,J.Gao,et al.An identification method for damping ratio in rotor system,Mech.Syst.Signal Process.(2015),http:/dx.doi.org/10.1016/j.ymssp.2015.05.023转子转子稳定性概述及发展稳定性概述及发展现状现状主要内容 1 离心压缩机及
15、汽轮机转子稳定性概述及发展现状离心压缩机及汽轮机转子稳定性概述及发展现状 2 转子稳定性识别方法转子稳定性识别方法 3 汽轮机及离心压缩机转子稳定性的改进措施汽轮机及离心压缩机转子稳定性的改进措施 4 转子稳定性技术研究展望转子稳定性技术研究展望转子稳定性识别方法转子稳定性识别方法Number of pads5Load directionLOPPad arc angle58Rotor diameter50 mmPad axial length28 mmPivot offset50%Pad preload0.167Bearing clearance0.1 mmPad clearance0.12
16、mmPad mass0.11kgPad inertia about pivot0.186 kg.cm2Lubricant typeISO VG 32Oil supply temperature41Journal speed7000-9000 rpmStatic specific load0.2821.020 MPaTab.3.Parameters for numerical calculation of TPJBNodeStiffness N/mKxxKxyKyxKyy17272.43068-3068272.420811210080-100808112Figure 4.Compressor rotordynamic FEM modelTab.2.Seal force coefficients for FEM modelThe finite element eq
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