一种新型Couette流变仪的力矩修正和粘度测量误差分析*

作者：李良才，郭关柱，范毓润* 日期：2010-06-28/span> 浏览：3450 查看PDF文档

一种新型Couette流变仪的力矩修正和粘度测量误差分析*
李良才，郭关柱，范毓润*
（浙江大学 流体传动与控制国家重点实验室，浙江 杭州 310027）

摘要：为准确计算得出新型Couette流变仪工作段剪切力矩，通过对计算机采集的电机输出转矩进行校核，得出了电机输出转矩真实值；利用商业旋转流变仪测量，得出了实验流体标准大气压下的粘温关系，最后得出了修正力矩与雷诺数的关系。考虑到该流变仪在制造和数据采集中存在误差，利用误差传递计算方法得出了新型Couette流变仪在测量流体粘度时的误差范围。分析结果为进一步测量不同状态下流体的粘度和研究空化奠定了基础。
关键词：Couette流变仪；力矩修正；粘度测量；误差分析
中图分类号：TP202+.2文献标识码：A文章编号：1001-4551(2010)04-0008-04

Torque modification of a new Couette rheometer and error analysis
of the viscosity measurement

LI Liangcai, GUO Guanzhu, FAN Yurun
(State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China)

Abstract: In order to accurate calculates the shear torque in the working section of the new Couette rheometer electrical motor output torque datas collected by the computer were rectified and the real data was gotten. A commercial coneplate rhtometer was utilized to obtain the viscosity and temperature relationship of experimental liquid. And a relationship between modified torque and Reynolds number was finally given. Considering the errors of the new Couette rheometer both in manufacturing process and data collecting process, the error band liquid viscosity was accounted by error transfer calculation method. The result shows that it builds a solid foundation for liquid viscosity measurement under various conditions and cavitations researches in future.
Key words: couette rheometer; torque modification; viscosity measurement; error analysis