对数螺线及直线型面单向联轴器摩擦自锁机制的显式动力学数值模拟比较研究  

Study on Explicit Dynamics Numerical Simulation Comparison of Self-locking Mechanism of Achimedean and Straight Line Types Mould Surface of One-way Clutch

作　　者：魏巍[1,2] 孙恬恬[2] 闫清东[2] 朱颜[3] 

机构地区：[1]北京理工大学车辆传动国家重点实验室,北京100081 [2]北京理工大学机械与车辆工程学院,北京100081 [3]聊城大学汽车与交通工程学院,山东聊城252059

出　　处：《润滑与密封》2009年第3期41-43,51,共4页Lubrication Engineering

基　　金：国防基础预研基金项目(K0904010502)

摘　　要：为保证综合式液力变矩器在偶合器及闭锁工况下的可靠、高效传动,以其换相工作的关键部件单向联轴器为研究对象,分析了其型面结构和自锁摩擦机制,构建了对数螺旋线型面和直线型面2种单向联轴器的计算模型,基于显式动力学分别对其楔紧过程的动态行为进行了数值模拟,并进行了摩擦过程的动态应力分布计算。结果表明,与有限元静力接触分析相比,采用显式动力学分析方法可以更为深入地了解摩擦自锁过程机制,以及准确计算动态过程中的应力分布和变化,分析结果表明对数螺旋线型面与直线型面相比,其应力峰值较小,楔紧过程较为合理,承载性能较好。Friction self-locking mechanism and construction of one-way clutch of a combination torque converter were analyzed to ensure the reliability and high efficiency at high speed ratio in hydrodynamic work condition of tractor vehicles, calculation models of achimedean screw and straight line mould surface types one-way clutch were built, and numerical simulation of dynamic behavior of wedge process and stress distribution calculation of both types were realized based on explicit dynamics analysis. Results show that friction self-locking mechanism can be understood deeply by explicit dynamics method and stress distribution and variation can be calculated more precisely. Compared with straight-line moulding surface, the peak stress value of achimedean screw moulding surface is lower, the wedging process is more reasonable and load-bearing performance is better.

关 键 词：单向联轴器 综合式液力变矩器 摩擦机制 显式动力学 

分 类 号：TH117.1[机械工程—机械设计及理论]