配制不同微水含量的绝缘油样,对每组油样进行红外光谱扫描,得到油样中水分在特征波数处(1 640 cm－1、3 400 cm－1、3 450 cm－1、3 615 cm－1)的吸光度值;定义油液中水分均匀系数,构建含微水绝缘油的粘度计算模型;实验测试含微水绝缘油40℃的运动粘度值,并与粘度计算模型的计算值进行比较.结果表明:本文所构造的计算模型能够有效地反映微量水分对油液运动粘度的影响;运动粘度实测值与计算值的相关系数为0.9449,误差范围为－4.458×10－4~5.175×10－4.

A series of insulating oil samples with different trace moisture contents were made up,and infrared spectrum scans were conducted on these samples to get the absorbance values of the water molecules at different characteristic wave numbers(namely 1 640 cm－1,3 400 cm－1,3 450 cm－1 and 3 615 cm－1).The uniformity coefficient of moisture in oil samples was defined,on the basis of which a calculation model for the kinematic viscosity of hydrous insulating oil was built up.The kinematic viscosity values of these oil samples under 40℃ were measured through experiments,which were compared with the calculated values based on the calculation model.The results showed that the calculation model can effectually reflect the influence rules of trace moisture on the kinematic viscosity of oil,and the correlation coefficient between the calculated values and the measured values was 0.9449,with an error range from －4.458×10－4 to 5.175×10－4.