张紧力对新型活齿无级变速器传动波动影响分析
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摘要
新型活齿无级变速器(innovative Movable-teeth CVT,i MCVT)是一种非摩擦式无级变速传动装置,其在传动的过程中会出现转速转矩的波动。为研究张紧力对其传动过程中转速转矩波动的影响,基于iMCVT的结构以及工作原理,分析iMCVT产生波动的原因;基于ADAMS建立其动力学仿真模型,通过改变张紧装置对金属齿形链的张紧力,来研究张紧力对i MCVT传动波动的影响。仿真结果表明,在传动比为1时,适当增加张紧力可以减少转速的波动,当张紧力达到一定值时(大约600 N),转速的波动趋于平稳。在此基础上,通过传动效率图可知,在一定范围内,增加张紧力可以提高传动效率,但过大的张紧力可导致传动效率的下降。研究结果为iMCVT张紧力的控制奠定了基础。
The Innovative Movable-teeth CVT( iMCVT) is a new type of non-friction continuously variable transmission,in the process of transmission,there will be fluctuations in rotational speed and torque. In order to investigate the influence of the tension to the fluctuations of the rotational speed and torque,based on the structure and work principle of iMCVT,the causes of iMCVT fluctuations are analyzed. Based on ADAMS,the dynamics simulation model is built. The effect of tension force on the iMCVT transmission fluctuation is studied by changing the tensioning force of the tensioning device on the metal tooth chain. The simulation results show that when the transmission ratio is 1,increasing the tension force can reduce the fluctuation of the rotational speed,when the tension force reaches a certain value( about 600 N),the fluctuation of the rotational speed tends to be stable. On this basis,through the formula to calculate the transmission efficiency curve,and in a certain range,increase the tension can improve the transmission efficiency,too much tension can lead to the decline of transmission efficiency. The results of this study laid the foundation for the control of iMCVT tension.
The Innovative Movable-teeth CVT( iMCVT) is a new type of non-friction continuously variable transmission,in the process of transmission,there will be fluctuations in rotational speed and torque. In order to investigate the influence of the tension to the fluctuations of the rotational speed and torque,based on the structure and work principle of iMCVT,the causes of iMCVT fluctuations are analyzed. Based on ADAMS,the dynamics simulation model is built. The effect of tension force on the iMCVT transmission fluctuation is studied by changing the tensioning force of the tensioning device on the metal tooth chain. The simulation results show that when the transmission ratio is 1,increasing the tension force can reduce the fluctuation of the rotational speed,when the tension force reaches a certain value( about 600 N),the fluctuation of the rotational speed tends to be stable. On this basis,through the formula to calculate the transmission efficiency curve,and in a certain range,increase the tension can improve the transmission efficiency,too much tension can lead to the decline of transmission efficiency. The results of this study laid the foundation for the control of iMCVT tension.
引文
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[12]周云山,王歆誉,张军.基于瞬态激励的CVT传动系统扭振响应研究[J].机械传动,2015,39(6):1-6.
[13]孟祥鑫,冯增铭.基于ADAMS的新型齿形链啮合仿真分析[J].机械设计与研究,2004(4):31-33.
[2] BELL C,GLOVENEA R. Tribological optimization of a toroidal-type continuously variable transmission[J]. Proceedings of the Institution of Mechanical Engineers,2011,225(6):407-417.
[3] ACHTENOVA G. Synthesis of efficient powersplit CVT/IVT system[J]. SAE Internation Journal of Passenger Cars Mechanical System,2014,7(2):888-896.
[4] MANRING N D,AL-GHRAIRI T S,VERMILLION S D. Designing a hydraulic continously variable transmission(CVT)for retrofitting a rear-wheel drive automobile[J]. Journal of Mechanical Design,2013,135:121003.
[5]冯能莲,米磊,邹广才.新型非摩擦式活齿无级变速器的研发[J].汽车工程,2017(3):328-334.
[6]田晋跃.车辆自动变速器构造原理与设计方法[M].北京:北京大学出版社,2009:179-180.
[7]王国斌.一种优化活齿无级变速器传动特性的控制策略:CN104214291[P]. 2014-12-31.
[8]张民.滑片活齿无级变速器样机设计及传动性能分析[D].赣州:江西理工大学,2016:38-56.
[9]曲绍朋.新型齿形链的啮合机制与动力学建模及齿形链导板的设计研究[D].长春:吉林大学,2007:31-35.
[10]董志峰,周伟,孙帅帅.汽车金属链式无级变速器传动运动特性分析[J].汽车工程学报,2011,1(3):210-214.
[11]许立新.步进链传动系统的动力学仿真研究[D].天津:天津大学,2008:35-54.
[12]周云山,王歆誉,张军.基于瞬态激励的CVT传动系统扭振响应研究[J].机械传动,2015,39(6):1-6.
[13]孟祥鑫,冯增铭.基于ADAMS的新型齿形链啮合仿真分析[J].机械设计与研究,2004(4):31-33.