非摩擦式无级变速装置的设计与研究
发布时间：2018-08-17 14:00
【摘要】：无级变速装置可分为摩擦传动无级变速装置与非摩擦传动无级变速装置,摩擦传动无级变速装置均利用工件表面的摩擦来传递动力的,因此想要大幅度提高摩擦传动的传动效率是极为困难的,脉动式无级变速装置是应用最为广泛的非摩擦传动无级变速装置,但脉动式无级变速装置理论上无法实现匀速的输出,而输出稳定无波动的非摩擦式无级变速装置研究与设计尚处于空白的状态。论文提出了一种新型非摩擦式无级变速装置,对该装置的总体方案、结构参数、运动特性、从动件运动规律以及重要零部件的有限元分析等相关问题进行了较深入的研究。论文主要完成了如下研究工作:根据非摩擦式无级变速装置的设计思路,将整个装置划分为输入装置、输出装置以及调速装置,并运用组合创新法和功能设计法分别对上述三个部分进行了方案创新设计,提出了一种新型非摩擦式无级变速装置的设计方案。在探讨了新型非摩擦式无级变速装置工作原理基础上,结合无级变速装置的工况与输出要求,确定了无级变速装置的相数,并对其输入装置与输出装置等相关参数进行了设计与计算,完成了新型非摩擦式无级变速装置的结构设计,分析了无级变速装置的理论输出特性与理论调速特性。构建了新型非摩擦式无级变速装置的Creo虚拟样机,并导入到ADAMS中对装置的输出特性与调速性能进行了仿真分析,验证了新型非摩擦式无级变速装置的可行性。分析了凸轮从动件运动规律的特性,重新设计了凸轮机构的从动件运动规律,消除了凸轮机构与棘轮机构产生的柔性冲击,并对改进后的无级变速装置进行了多刚体运动学仿真,分析了改进后装置的输出特性。建立了凸轮机构静平衡方程,分析计算获得了曲柄的最大拉力与输入轴扭矩的分布情况,并在ANSYS中对其进行了有限元分析,结果表明设计的输入轴与曲柄均满足强度要求。
[Abstract]:The stepless gearshift device can be divided into friction drive stepless gear device and non-friction drive continuously variable speed device. Friction drive stepless variable speed device uses friction on the surface of workpiece to transfer power. Therefore, it is very difficult to improve the transmission efficiency of friction transmission by a large margin. The pulsating stepless speed change device is the most widely used non-friction transmission stepless speed change device, but the pulsating continuously variable speed device can not realize the uniform speed output theoretically. The research and design of non-friction stepless speed changer with stable output and no fluctuation is still in blank state. In this paper, a new type of non-friction stepless speed-changing device is proposed. The general scheme, structural parameters, motion characteristics, the motion law of follower and the finite element analysis of important parts are studied deeply. The main work of this thesis is as follows: according to the design idea of non-friction stepless variable speed device, the whole device is divided into input device, output device and speed regulating device. By using the combination innovation method and the function design method, the scheme innovation design of the above three parts is carried out, and a new design scheme of the non-friction stepless variable speed device is put forward. On the basis of discussing the working principle of a new type of non-friction CVT, the phase number of CVT is determined by combining the working conditions and output requirements of CVT. The related parameters such as input device and output device are designed and calculated. The structure design of the new non-friction stepless speed-changing device is completed. The theoretical output characteristics and the theoretical speed-regulating characteristics of the stepless speed-changing device are analyzed. The Creo virtual prototype of a new non-friction stepless speed changer is constructed, and the output characteristic and speed regulation performance of the device are simulated and analyzed in ADAMS, which verifies the feasibility of the new non-friction stepless speed changer. The characteristics of the motion law of cam follower are analyzed, the motion law of follower of cam mechanism is redesigned, and the flexible impact of cam mechanism and ratchet mechanism is eliminated. The kinematics simulation of the improved stepless variable speed device is carried out, and the output characteristics of the improved device are analyzed. The static equilibrium equation of cam mechanism is established, and the distribution of maximum pull force and input shaft torque of crank is obtained. The finite element analysis is carried out in ANSYS. The results show that the designed input shaft and crank meet the requirements of strength.
【学位授予单位】：湘潭大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH132.46
本文编号：2187859
[Abstract]:The stepless gearshift device can be divided into friction drive stepless gear device and non-friction drive continuously variable speed device. Friction drive stepless variable speed device uses friction on the surface of workpiece to transfer power. Therefore, it is very difficult to improve the transmission efficiency of friction transmission by a large margin. The pulsating stepless speed change device is the most widely used non-friction transmission stepless speed change device, but the pulsating continuously variable speed device can not realize the uniform speed output theoretically. The research and design of non-friction stepless speed changer with stable output and no fluctuation is still in blank state. In this paper, a new type of non-friction stepless speed-changing device is proposed. The general scheme, structural parameters, motion characteristics, the motion law of follower and the finite element analysis of important parts are studied deeply. The main work of this thesis is as follows: according to the design idea of non-friction stepless variable speed device, the whole device is divided into input device, output device and speed regulating device. By using the combination innovation method and the function design method, the scheme innovation design of the above three parts is carried out, and a new design scheme of the non-friction stepless variable speed device is put forward. On the basis of discussing the working principle of a new type of non-friction CVT, the phase number of CVT is determined by combining the working conditions and output requirements of CVT. The related parameters such as input device and output device are designed and calculated. The structure design of the new non-friction stepless speed-changing device is completed. The theoretical output characteristics and the theoretical speed-regulating characteristics of the stepless speed-changing device are analyzed. The Creo virtual prototype of a new non-friction stepless speed changer is constructed, and the output characteristic and speed regulation performance of the device are simulated and analyzed in ADAMS, which verifies the feasibility of the new non-friction stepless speed changer. The characteristics of the motion law of cam follower are analyzed, the motion law of follower of cam mechanism is redesigned, and the flexible impact of cam mechanism and ratchet mechanism is eliminated. The kinematics simulation of the improved stepless variable speed device is carried out, and the output characteristics of the improved device are analyzed. The static equilibrium equation of cam mechanism is established, and the distribution of maximum pull force and input shaft torque of crank is obtained. The finite element analysis is carried out in ANSYS. The results show that the designed input shaft and crank meet the requirements of strength.
【学位授予单位】：湘潭大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH132.46
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