P-CVT并列多相传动机构运动弹性动力学分析  

Analysis on elastic parallel multi-transmission-mechanisms of P-CVT

作　　者：薛渊[1,2] 陆念力[1] 王伟[2] 李俊[1] 

机构地区：[1]哈尔滨工业大学机电工程学院,哈尔滨150001 [2]哈尔滨工业大学土木工程学院,哈尔滨150001

出　　处：《哈尔滨工业大学学报》2013年第3期45-49,共5页Journal of Harbin Institute of Technology

基　　金：中央高校基本科研业务费专项基金资助项目(HIT.KLOF.2010054)

摘　　要：在考虑脉动无级变速器(P-CVT)传动机构弹性和机构之间动力弹性耦合的基础上,提出多相传动机构并联工作的新观点,给出了传动机构工作状态的判断方法.基于精确KED方法,建立并列多相传动机构的运动弹性动力学模型.以典型P-CVT作为算例,对输出速度、脉动率和工作状态等动态特性进行分析.结果表明:过渡时间和脉动率随着输出轴的转动惯量增加而分别增加和减少;出现单相工作、多相工作或零相工作等多种工作状态,并联工作机构数目及历时随传动比增加而分别增加.与传统模型相比,提出的数学模型较精确地反映了P-CVT真实运动规律.On the basis that taking flexibility and dynamic elastic coupling of each phase transmission mechanism of P-CVT into consideration,a new parallel work of multiple-phase transmission mechanism of P-CVT is proposed,and the judge principle of transmission mechanism working condition is given.Base on accurate KED method,Kineto-Elasto dynamics model of CVT parallel multiple-phase transmission mechanism is established.Taking the typical P-CVT as an example to analyze its output speed,pulse rate and working state,the result indicated that with the increase of rotational inertia of output shaft,the transit time increased and the pulse rate decreased.The phenomenon of single phase,multiple phases or zero phase working occurred.The number of mechanisms that functions in the parallel work and the duration both increased with the increase of transmission rate.In comparison with the traditional methods,the dynamics model given in this article reflected the real movement of transmission mechanism of P-CVT accurately.

关 键 词：脉动无级变速器 传动机构 运动弹性动力学模型 真实运动 

分 类 号：TH139[机械工程—机械制造及自动化]