干冰清洗对复合绝缘子用硅橡胶憎水性的影响研究

Effect of dry ice cleaning on hydrophobicity of silicone rubber for composite insulators

为了研究干冰清洗对复合绝缘子表面憎水性的影响,本试验选用高温硫化硅橡胶作为试样模拟复合绝缘子,对硅橡胶进行不同污秽程度的人工涂污,在不同参数下进行干冰清洗实验,详细研究了空气压力、清洗角度、干冰质量流量对复合绝缘子用硅橡胶表面憎水性的影响。结果表明,不同的空气压力和质量流量的干冰具有不同的动能,随着空气压力和质量流量的增大,硅橡胶表面污秽清洗效果变好,憎水性提高;但当干冰动能达到一定程度时,硅橡胶表面清洗效果达到阈值。不同的清洗角度影响干冰颗粒的垂直打击分量从而影响干冰的清洗效果。在合理的空气压力、清洗角度和质量流量下,干冰清洗能够有效的去除硅橡胶表面污秽,提高硅橡胶表面的憎水性,同时保证不对硅橡胶造成损伤。

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. The results show that dry ice with different air pressure and mass flow has different kinetic energy. 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 kinetic energy of dry ice reaches a certain level,the cleaning effect of silicone rubber surface reaches the threshold. Different cleaning angles affect the vertical impact component of dry ice particles,thus affecting 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.