Improvement Measures for Defects of 500 kV Grounding Switch Transmission Mechanism
Areva SPOL-T-2T 2SPOL-T-2T-3T 500KV and SPVLT 500KV type disconnectors,the ground knife STB base uses bevel gear as the transmission connection between the vertical connecting rod and the horizontal connecting rod.In the process of use,there are early broken teeth,jamming and deformation,which lead to the ground cutter not being able to perform normal opening and closing operation,and the same problem still occurs after replacing the new gear.Based on the calculation of the stress on the gear transmission mechanism of the grounding switch,this paper analyzes the causes of its damage with examples.It is proposed to replace the gear transmission structure with the crank arm transmission structure.By calculating its rotation angle and mechanical properties,it is proved that the connecting rod structure can replace the original structure and effectively reduce the failure rate in practical engineering application.
Grounding switchGear transmissionTurn arm driveForce analysis
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