石蜡驱动的热滞后现象及其影响因素  

Study on Influence Factors of Thermal Hysteresis in Paraffin Thermal Expansion Actuator

作　　者：刘莹[1] 孙长存[1] 陈兵芽[1,2] 

机构地区：[1]南昌大学机电工程学院,江西南昌330031 [2]南昌航空大学自动化学院,江西南昌330063

出　　处：《南昌大学学报（工科版）》2009年第2期192-196,共5页Journal of Nanchang University(Engineering & Technology)

基　　金：江西省自然科学基金资助项目(0650086);江西省教育厅科技计划项目(GJJ08217)

摘　　要：在水浴加热石蜡热膨胀性能试验装置的基础上,通过实验研究了不同冷却方式、弹簧压力和不同温度测量点下石蜡升温和降温过程中位移-温度关系曲线的"热滞后"的现象,分析了"热滞后"的实际原因。实验所表现出来的"热滞后"真正的原因是温度测量误差造成的。选择适当的测量点、改变冷却速度可减小这种滞后量。而由于驱动器整个位移传递系统造成的滞后量相对是比较小的。Based on an experimental apparatus for paraffin thermal expansion characteristics with water, the influences of cooling means and spring pressure on thermal hysteresis phenomenon in relationship curve of displacement vs. temperature during increasing and decreasing temperature cycles of paraffin have been investigated by experiments. The experimental results indicate that the real reason for the phenomenon to appear during the experiment is the error in measurement of temperature. Such hysteresis can be decreased by choosing the right measurement point or changing the cooling speed. Another reason is transportation of displacement in system, but it contributes relatively minor hysteresis.

关 键 词：石蜡 热滞后 冷却方式 弹簧压力 

分 类 号：O482.23[理学—固体物理]