考虑效率时蜗杆传动作用力的新算法

蜗杆传动因效率低,在力的大小计算时应计效率;而在考虑效率时,蜗杆副力的计算式不统一,这里推导出考虑效率时力的大小计算的两套公式。     

液力变矩器油温过高的原因及控制

分析了导致变矩器油温过高的原因:主要有变矩器油位过高或过低;冷却系统效果不良;使用操作不当;液力传动油选用不当等及控制措施。液力变矩器油温过高是液力传动系统常见故障,科学地管理和使用液力传动系统,对于减少故障、提高使用寿命具有重要意义。     

浅谈液压传动系统的功率损失

探索和研究高效液压传动技术,提高其综合性能是全世界液压界关注的重要课题之,本文从液压泵、管路、电机和油缸等几个方面对液压系统的能量损失和传动效率进行了分析和研究.     

一种新型传动齿轮箱的结构研究

介绍新型传动齿轮箱的结构特点。     

Probability Model for the intermolecular force with surface roughness considered

This paper studies the intermolecular force considering both the roughness of the air-bearing surface and the disk surface by simulation. A model is developed to deal with the intermolecular force, the contact force and the air-bearing force based on the probability distributions of the roughness of the surfaces. The intermolecular force is linked with the contact force when its repulsive term is stronger than its attractive term. In such a case, all the intermolecular force, the contact force and the air-bearing force can be extended to the various flying height regions. Some interesting results are observed and discussed. It is found that both the Hamaker constant and the surface roughness have significant influences on the intermolecular pressure. Compared with the intermolecular pressure with smooth surfaces, that with the surface roughness considered shows greater attractive pressure at the flying height higher than 0.7 nm approximately, but much smaller values between 0.26 and 0.7 nm approximately. A negative stiffness region exists when the minimum flying height is between −0.2 and 1.2 nm for the case studied in this paper. It shows that the Probability Model is suitable for the intermolecular force calculation with the surface roughness considered.     

蜗轮蜗杆机构的计算机辅助设计

本文介绍了蜗轮蜗杆结构的计算机辅助设计方法，给出了设计的流程图、部分主程序模块和子程序，可用以替代常规的手工设计，以提高设计效率。     

Effect of angular speed on behavior of a V-belt drive system

For a V-belt drive system, the effect of angular speed on the three-dimensional frictional contact behaviors on the contact surfaces between the V-belt and pulley flange is studied in this work. To deal with the frictional contact phenomena for the V-belt drive system, an effective three-dimensional finite element procedure is developed herein. By this procedure, the deformation of the V-belt and the normal/tangential contact forces occurring on the contact surfaces can be estimated accurately. The friction angles of contact points along the edge of the V-belt cross section are also presented for various dynamic friction coefficients. From the computed results, it is found that smaller friction angles are obtained as dynamic friction coefficients get larger. The results achieved are very helpful for the estimation of operation efficiency of the V-belt drive system.     

多级圆柱齿轮减速器的速比分配

从二级减速器入手，针对不同的情况，分别推导出追求不同设计目标的速比分配方程式，进而说明了应用这些方程式解决多级减速器速比分配的方法     

塑料谐波齿轮传动结构尺寸的优化设计

分析了工程塑料作为谐波齿轮传动材料的优越性 ,并针对减小塑料谐波齿轮传动的体积 ,对其结构尺寸进行了优化设计 ,并对优化的塑料谐波齿轮传动装置进行了试验研究。     

柔性驱动对旋转冲击运动的控制

对旋转机械,用柔性联接驱动代替刚性联接驱动。建立了旋转系统运动与柔性联轴器参数的关系。通过对柔性联轴器扭转响应和旋转系统扭转冲击响应的计算分析,发现旋转系统冲击角加速度随柔性联轴器阻尼的增大而减小,随柔性联轴器扭转刚度的减小而减小。说明在旋转系统其他参数不变的情况下,可通过调整柔性连轴器的扭转刚度和阻尼达到对旋转系统冲击运动的控制。