Method and device for evaluating aging state of silicone rubber composite insulator

A method for evaluating an aging state of a silicone rubber composite insulator, comprising the following steps:

• step 1:
• collecting samples from the silicone rubber composite insulator, subjecting samples in a surface layer successively to hydrophobicity, flexing resistance, hardness, color, and absorbance tests, and subjecting samples in a center layer successively to hardness, color, and absorbance tests;
• step 2:
• determining an average static contact angle, a flexing resistance index, a hardness difference, a color difference, and an absorbance rise rate of the samples during a natural evolution process according to the tests in step 1;
• step 3:
• subjecting the samples to thermo-oxidative aging;
• and after the thermo-oxidative aging is completed, subjecting the samples to a hardness test of artificial accelerated evolution, and calculating position coordinates (F1, F2) of the samples in an aging space;
• and
• step 4:
• classifying the samples in advance and solving an aging state centroid of each classified population, calculating a minimum aging distance based on the position coordinates in step 3, and evaluating the aging state of the silicone rubber composite insulator based on the minimum aging distance.