CVT刚性联接发动机曲轴轴系结构的扭振分析
|
摘要
因非道路车辆的特殊结构和成本限制,提出四缸柴油发动机中采用CVT刚性联接曲轴轴系结构。阐述了该新型结构的特征和工作原理,建立了四缸柴油发动机离合式曲轴计算模型和CVT刚性联接曲轴计算模型。通过曲轴前端实验,证明了所建模型和模型参数确定方法的正确性。求解所有计算模型,并对结果进行对比分析。结果表明,CVT刚性联接使曲轴轴系振动波动加大,减振器耗散能增加,各阶共振峰值对应转速低减。对曲轴各拐剪切应力幅度的影响不大,但有高转速工况降低而中低转速剪切应力幅值增加的普遍趋势,CVT端的扭振振幅和剪切应力较大些。综合研究得出结论:非道路车辆低速四缸柴油发动机可以采纳CVT刚性联接曲轴轴系结构。
Due to the limitation of non-road vehicles' structure and cost,a structure of four-cylinder diesel engine crankshaft with rigidly coupling CVT was proposed.Characteristics and working principles of the new structure were presented.Calculation models were established separately for rotational vibration analysis of the newly proposed structure and the crankshaft with clutch.By carrying out the crankshaft front-end experiment,the presented model and the calculation method were validated.After solving both models for torsional vibration characteristics and parameters,results were compared.The comparison indicates that crankshaft with rigidly coupling CVT make the vibration fluctuation and the crankshaft dissipation power increase while the corresponding speed of resonance peak value decreases.The impacts on crank shear stress turn out to be small,while the shear stress tends to decrease at low speed condition and increase at high speed condition.Also,the torsional vibration amplitudes and shear stress at the end of CVT are larger.Through the comprehensive comparison,it can be concluded that the crankshaft with rigidly coupling CVT can be adopted on non-road low-speed four-cylinder diesel engine.
Due to the limitation of non-road vehicles' structure and cost,a structure of four-cylinder diesel engine crankshaft with rigidly coupling CVT was proposed.Characteristics and working principles of the new structure were presented.Calculation models were established separately for rotational vibration analysis of the newly proposed structure and the crankshaft with clutch.By carrying out the crankshaft front-end experiment,the presented model and the calculation method were validated.After solving both models for torsional vibration characteristics and parameters,results were compared.The comparison indicates that crankshaft with rigidly coupling CVT make the vibration fluctuation and the crankshaft dissipation power increase while the corresponding speed of resonance peak value decreases.The impacts on crank shear stress turn out to be small,while the shear stress tends to decrease at low speed condition and increase at high speed condition.Also,the torsional vibration amplitudes and shear stress at the end of CVT are larger.Through the comprehensive comparison,it can be concluded that the crankshaft with rigidly coupling CVT can be adopted on non-road low-speed four-cylinder diesel engine.
引文
[1]Carbone G,Mangialardi L,Bonsen B,et al.CVT dynamics:theory and experiments[J].Mechanism and Machine Theory,2007,42(4):409-428.
[2]陈翔,崔志琴.发动机曲轴轴系扭振技术研究的方法分析[J].机械工程与自动化,2013(6):216-217.CHEN Xiang,CUI Zhiqin.Current situation and prospect of engine crankshaft torsional vibration technology research[J].Mechanical Engineering&Automation,2013(6):216-217.(in Chinese)
[3]Subbu R,Samy B A,Sharma P M,et al.Measurement and validation of two wheeled vehicle single cylinder engine unbalance force calculation on the crankshaft[C/OL]∥SAE/JSAE 2014 Small Engine Technology Conference&Exhibition.[S.l.]:SAE,2014[2016-02-19].http:∥papers.sae.org/2014-32-0061/.
[4]李玉梅,华春蓉,闫兵.内燃机轴系扭振测试方法研究[J].车用发动机,2010(1):77-80.LI Yumei,HUA Chunrong,YAN Bing.Study on testing method of crankshaft torsional vibration[J].Vehicle Engine,2010(1):77-80.(in Chinese)
[5]Shangguan W B.Experimental and calculation analysis of rotational vibration for an engine front end accessory drive system[J].SAE International Journal of Passenger Cars Mechanical Systems,2011,4(2):1000-1017.
[6]徐科达,俞水良.柴油机曲轴扭振计算分析软件的开发与应用[J].机电工程技术,2011,40(2):71-74.XU Keda,YU Shuiliang.Computational and analytic software development for the torsional vibration of dieselengine crankshaft[J].Mechanical&Electrical Engineering Technology,2011,40(2):71-74.(in Chinese)
[7]Villalva S G,Bittencourt M L,Zampieri P R.Methodology for automotive crankshaft design using analytical and flexible models[C/OL]∥22nd SAE Brasil International Congress and Display.[S.l.]:SAE,2013[2016-02-19].http:∥papers.sae.org/2013-36-0590/.
[8]Nerubenko G.Tuned torsional vibration damper[C/OL]∥SAE 2013 Noise and Vibration Conference and Exhibition.[S.l.]:SAE,2013[2016-02-19].http:∥papers.sae.org/2013-01-1897/.
[9]蒋爱香,李为.某柴油机的曲轴系扭振计算研究[J].柴油机,2014,36(6):35-38.JIANG Aixiang,LI Wei.Torsional vibration calculation for a certain diesel engine[J].Diesel Engine,2014,36(6):35-38.(in Chinese)
[10]Rodrigues A,Silva R L E,Cruz R,et al.Experimental and numerical modal analysis of 6cylinders diesel crankshaft[C/OL]∥SAE Brasil 2011Congress and Exhibition.[S.l.]:SAE,2011[2016-02-19].http:∥papers.sae.org/2011-36-0358/.
[11]Kandreegula S K,Paroche S,Mukherjee S,et al.Static and dynamic study of 4-cylinder diesel engine crankshaft using FEM and analytical approaches[C/OL]∥International Mobility Conference,[S.l.]:SAE,2016[2016-02-19].http:∥papers.sae.org/2016-28-0108/.
[12]宋武强.基于EXCITE-Designer的车用汽油机曲轴扭转振动分析和不同减振器性能对比[J].内燃机与动力装置,2010(1):21-24.SONG Wuqiang.Analysis of torsion vibration of crankshaft and performance comparison with different dampers on EXCITE-designer software[J].Internal Combustion Engine&PowerPlant,2010(1):21-24.(in Chinese)
[13]Mendes A S,Kanpolat E,Rauschen R.Crankcase and crankshaft coupled structural analysis based on hybrid dynamic simulation[J].SAE International Journal of Engines,2013,6(4):2044-2053.
[14]Ukhande M,Mane R,Shegavi G.Optimization of crankshaft torsional rigidity for fatigue strength improvement using CAE[C/OL]∥SAE 2012 World Congress&Exhibition.[S.l.]:SAE,2012[2016-02-19].http:∥papers.sae.org/2012-01-0404/.
[15]Su W T.Structural optimization of a diesel engine crankshaft[C/OL]∥22nd SAE Brasil International Congress and Display.[S.l.]:SAE,2013[2016-02-19].http:∥papers.sae.org/2013-36-0595/.
[2]陈翔,崔志琴.发动机曲轴轴系扭振技术研究的方法分析[J].机械工程与自动化,2013(6):216-217.CHEN Xiang,CUI Zhiqin.Current situation and prospect of engine crankshaft torsional vibration technology research[J].Mechanical Engineering&Automation,2013(6):216-217.(in Chinese)
[3]Subbu R,Samy B A,Sharma P M,et al.Measurement and validation of two wheeled vehicle single cylinder engine unbalance force calculation on the crankshaft[C/OL]∥SAE/JSAE 2014 Small Engine Technology Conference&Exhibition.[S.l.]:SAE,2014[2016-02-19].http:∥papers.sae.org/2014-32-0061/.
[4]李玉梅,华春蓉,闫兵.内燃机轴系扭振测试方法研究[J].车用发动机,2010(1):77-80.LI Yumei,HUA Chunrong,YAN Bing.Study on testing method of crankshaft torsional vibration[J].Vehicle Engine,2010(1):77-80.(in Chinese)
[5]Shangguan W B.Experimental and calculation analysis of rotational vibration for an engine front end accessory drive system[J].SAE International Journal of Passenger Cars Mechanical Systems,2011,4(2):1000-1017.
[6]徐科达,俞水良.柴油机曲轴扭振计算分析软件的开发与应用[J].机电工程技术,2011,40(2):71-74.XU Keda,YU Shuiliang.Computational and analytic software development for the torsional vibration of dieselengine crankshaft[J].Mechanical&Electrical Engineering Technology,2011,40(2):71-74.(in Chinese)
[7]Villalva S G,Bittencourt M L,Zampieri P R.Methodology for automotive crankshaft design using analytical and flexible models[C/OL]∥22nd SAE Brasil International Congress and Display.[S.l.]:SAE,2013[2016-02-19].http:∥papers.sae.org/2013-36-0590/.
[8]Nerubenko G.Tuned torsional vibration damper[C/OL]∥SAE 2013 Noise and Vibration Conference and Exhibition.[S.l.]:SAE,2013[2016-02-19].http:∥papers.sae.org/2013-01-1897/.
[9]蒋爱香,李为.某柴油机的曲轴系扭振计算研究[J].柴油机,2014,36(6):35-38.JIANG Aixiang,LI Wei.Torsional vibration calculation for a certain diesel engine[J].Diesel Engine,2014,36(6):35-38.(in Chinese)
[10]Rodrigues A,Silva R L E,Cruz R,et al.Experimental and numerical modal analysis of 6cylinders diesel crankshaft[C/OL]∥SAE Brasil 2011Congress and Exhibition.[S.l.]:SAE,2011[2016-02-19].http:∥papers.sae.org/2011-36-0358/.
[11]Kandreegula S K,Paroche S,Mukherjee S,et al.Static and dynamic study of 4-cylinder diesel engine crankshaft using FEM and analytical approaches[C/OL]∥International Mobility Conference,[S.l.]:SAE,2016[2016-02-19].http:∥papers.sae.org/2016-28-0108/.
[12]宋武强.基于EXCITE-Designer的车用汽油机曲轴扭转振动分析和不同减振器性能对比[J].内燃机与动力装置,2010(1):21-24.SONG Wuqiang.Analysis of torsion vibration of crankshaft and performance comparison with different dampers on EXCITE-designer software[J].Internal Combustion Engine&PowerPlant,2010(1):21-24.(in Chinese)
[13]Mendes A S,Kanpolat E,Rauschen R.Crankcase and crankshaft coupled structural analysis based on hybrid dynamic simulation[J].SAE International Journal of Engines,2013,6(4):2044-2053.
[14]Ukhande M,Mane R,Shegavi G.Optimization of crankshaft torsional rigidity for fatigue strength improvement using CAE[C/OL]∥SAE 2012 World Congress&Exhibition.[S.l.]:SAE,2012[2016-02-19].http:∥papers.sae.org/2012-01-0404/.
[15]Su W T.Structural optimization of a diesel engine crankshaft[C/OL]∥22nd SAE Brasil International Congress and Display.[S.l.]:SAE,2013[2016-02-19].http:∥papers.sae.org/2013-36-0595/.