基于Couette流变仪的0.1～0.5MPa压力下液体粘度测量方法  

Liquid viscosity measurement method in the pressure range of 0.1～0.5MPa based on Couette rheometer

作　　者：王坤[1] 贾震[1] 范毓润[1] 

机构地区：[1]浙江大学流体传动与控制国家重点实验室,浙江杭州310027

出　　处：《机电工程》2011年第4期407-410,共4页Journal of Mechanical & Electrical Engineering

基　　金：国家自然科学基金面上资助项目(50675202)

摘　　要：为了研究使用Couette流变仪在0.1 MPa^0.5 MPa压力范围内测量液体粘度的方法,首先对流变仪进行了强度校核,结果表明流变仪在低于4.2 MPa压力下可以安全工作。然后对如何通过电机输出力矩得到流变仪工作段力矩的问题做出了研究;最后,根据推导出的工作段力矩与所测液体粘度成正比的关系,总结出了通过工作段力矩间接求得液体粘度的方法。误差分析结果表明该方法测量误差为7%左右。所做工作为以后利用Couette流变仪研究液体粘度与含气量的关系以及空化机理奠定了基础。In order to research the method of liquid viscosity measurement in the pressure range of 0.1 MPa^0.5 MPa using the Couette rheometer,strength check of the rheometer was done firstly.The result shows that the rheometer can work safely in the pressure less than 4.2 MPa.Secondly,the problem of how to get the torque of the working section from the output torque of the motor was solved.Finally,according to the proportional relationship between the viscosity of liquid and the output torque of the working section,the way of computing the liquid viscosity through the torque of working section indirectly was summarized.The error analysis results show that,the relative error of viscosity measurement is about 7%.The work makes a good foundation for the research of the influence of the amount of air absorbed in the liquid to the viscosity of it and the mechanism of cavitation.

关 键 词：Couette流变仪 强度校核 粘度测量 力矩校核 误差分析 

分 类 号：TH71[机械工程—测试计量技术及仪器] TH122[机械工程—仪器科学与技术]