特高压GIS断路器用管型绝缘拉杆动态受力真型试验与材料压缩特性分析OA北大核心CSTPCD

The insulation rod,as the key element for connecting the contact and operating mechansim of UHV GIS circuit breaker,needs withstanding external stress during the operation.For mastering the dynamic stress characteris-tics and the material's mechanical charcateristic of the insulating rod,the force sensor is arranged in the UHV GIS circuit breaker to measure the dynamic stress of its main insulation rod during the operation period.According to the measurement results,the compression test of tubular sample of the insulation rod is carried out,and the compression buckling characteristics of samples with different length diameter ratio are simulated and analyzed.The test results show that the insulation rod is subjected to alternating impact loads during operation.The peak of the pressure ap-plied by the operating mechanism to the insulation rod is close to that of the tensile force in the test,and both of them are above 110 kN.Therefore,the compression characteristics of the material of insulation rod should be paid atten-tion to.The compression test results show that the length,inner and outer diameters will directly affect the compres-sion performance of the tubular insulation rod,plastic deformation and buckling instability under compressive force are more likely to occur for the insulation rod with large aspect ratio,and the bore maximum compressive load is smaller.Based on the compression test of the material,the approximate relationship between the critical buckling load and length of the insulating rod is set up through simulation calculation,and a method to obtain the critical buck-ling load of the original-sized rod is proposed through the compression test of the tubular specimen.The research re-sults of this paper can provide reference for the material testing,design and manufacture of insulation rod for UHV GIS.