宋代水运仪象台天柱系统传动特性  

Driving characteristics of the transmission-shaft system in the Song Dynasty astronomical clock tower

作　　者：唐乐为[1] 唐晓强[1] 李铁民[1] 刘志华[1] 王伟方[1] 

机构地区：[1]清华大学精密仪器与机械学系,北京100084

出　　处：《清华大学学报（自然科学版）》2014年第11期1497-1501,共5页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(50975149;11173067)

摘　　要：宋代水运仪象台是中国古代水力天文机械的杰出代表之一。它能通过控制水量调节枢轮运转速度,实现天文观测、天象演示和自动计时的功能。该文在建立水运仪象台完整运动系统模型的基础上,重点研究天柱传动系统的运动特性。首先分析天柱系统运动过程,然后通过3维模型对运动进行仿真分析,并引入仿真摩擦力计算结果,研究各传动摩擦力对天柱系统的运动敏感度问题。计算结果表明:地毂与天柱下轮摩擦力对天柱系统运转影响最大;天柱系统在给定结构条件下,能够保证水运仪象台的正常运转。The Song Dynasty astronomical clock tower is an out- standing example of ancient Chinese hydraulic machines. The device for studying the universe has automatic timing for planetarium shows. The system adjusts the escapement wheel speed by control- ling the water quantity. A model of the astronomical clock tower is built here to study the kinematics of the transmission-shaft system. This 3-D model used to analyze the transmission-shaft system move- ments illustrates the friction effects which control the motion. The results show that the friction between the earth wheel and the lower wheel is more important than the other friction effects. The results also confirm tb.at the transmission-shaft system can smoothly drive the astronomical clock tower with this structure.

关 键 词：水运仪象台 天柱系统 传动特性 

分 类 号：N09[自然科学总论—科学技术哲学] TP391[自动化与计算机技术—计算机应用技术]