双腔半环面型无级变速机构功率流与效率分析

发布时间：2018-03-22 11:52

本文选题：无级变速器　切入点：大转矩传输　出处：《机械传动》2016年02期 　论文类型：期刊论文

【摘要】：针对由半环面型无级变速单元、定轴轮系和双排差动轮系组成的双腔半环面型无级变速机构,分析了该机构实现大转矩传输和功率分流时定轴轮系传动比、双排差动轮系转换机构速比必须满足的条件;推导了功率分流条件下流经半环面型无级变速单元的功率与双腔半环面型无级变速机构输入功率的比以及机构传动效率的表达式,并得出:无论是定轴轮系传动比的减小,还是双排差动轮系转换机构速比的减小,都将使流经半环面型无级变速单元的功率与双腔半环面型无级变速机构输入功率的比值减小而机构传动效率提高。最后,通过算例验证了定轴轮系传动比、双排差动轮系转换机构速比的变化对流经半环面型无级变速单元的功率与双腔半环面型无级变速机构输入功率的比值以及机构传动效率的影响。
[Abstract]:Aiming at the two-cavity semi-toroidal stepless gear-changing mechanism which consists of semi-toroidal stepless variable unit, fixed axis gear train and double row differential gear train, the transmission ratio of fixed axis gear train is analyzed when the mechanism realizes large torque transmission and power shunt. Under the condition of power shunt, the ratio of the power flowing through the semi-torus type stepless variable unit to the input power of the two-cavity half-toroidal continuously variable mechanism and the expression of the transmission efficiency of the mechanism are derived. It is concluded that: whether the transmission ratio of the fixed shaft gear train is reduced or the speed ratio of the double row differential gear train is reduced, Both of them will reduce the ratio of the power flowing through the semi-toroidal continuously variable unit to the input power of the two-cavity semi-toroidal continuously variable mechanism and improve the transmission efficiency of the mechanism. Finally, the transmission ratio of the fixed axis gear train is verified by an example. The influence of the change of the speed ratio of the double row differential gear train on the ratio of the power flowing through the semi-toroidal continuously variable speed unit to the input power of the two-cavity semi-toroidal continuously variable mechanism and the transmission efficiency of the mechanism.
【作者单位】：西华大学机械工程学院;四川大学制造科学与工程学院;
【基金】：国家自然科学基金(51405395) 西华大学自然科学重点基金(z1410211) 西华大学四川省重点实验室开放研究基金(szjj2013-039)
【分类号】：TH132.46

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