Abstract:Compared with routine methods, dry ice cleaning as a new type of green cleaning technology is used for the contamination cleaning of insulator surfaces. Dry ice cleaning process parameters as the core technology of dry ice cleaning are the key factors affecting the cleaning effect of insulators. In order to study the effect of dry ice cleaning on the surface water repellency of composite insulators, high-temperature vulcanized silicone rubbers were used as samples to simulate composite insulators, and the silicone rubbers were artificially smeared with different levels of contamination. The dry ice cleaning experiments were carried out under different parameters. The effects of air pressure, cleaning angle and mass flow rate on the hydrophobic properties of the silicone rubbers for composite insulators were studied in detail. As the air pressure and mass flow rate increase, the cleaning effect of the surface of the silicone rubber is improved, and the water repellency is improved; However, when the dry ice kinetic energy reaches a certain level, the surface cleaning effect of the silicone rubber reaches a threshold. Different cleaning angles affect the vertical impact component of dry ice particles and thus affect the cleaning effect of dry ice. Under reasonable air pressure, cleaning angle and mass flow rate, dry ice cleaning can effectively remove the surface contamination of silicone rubber, improve the water repellency of the silicone rubber surface, and ensure that the silicone rubber is not damaged.