用于特高压带电作业的碳纤维通用闭式卡设计及研制

Design and development of general closed fixture made of Carbon fiber for UHV live working

针对现有用于特高压带电作业的闭式卡存在的不足,通过对通用结构研究和材料选型设计,设计研制碳纤维通用闭式卡,并利用仿真力学计算对闭式卡具结构进行静力学分析。计算结果表明:闭式卡受力薄弱环节位于双耳螺栓孔,在3倍额定荷载(240 kN)下,卡具最大应力达到58.78 MPa,最大位移量为0.007 156 mm,最小安全系数为5.1。机械强度校核试验结果表明,闭式卡的破坏荷载达到260 kN,满足设计要求。该轻质化碳纤维闭式卡是特高压带电作业大吨位工器具的升级换代产品,具有重要的工程实际意义。

In order to overcome the existing shortcomings of closed fixture for UHV live working, a new type of carbon fiber based universal closed fixture is designed after series of researches including structure design and material selection. In addition, the structural stresses of closed fixture are analyzed through mechanics calculation. The calculation result shows that the weak link of closed fixture is located at the ear bolt hole. By appliying a load with 240 kN, which is 3 times as that of the rated load, the maximum stress of pin hole reaches 58.78 MPa.while the maximum displacement is 0.007 156 mm and the minimum safety factor is 5.1. To the end, a mechanical strength check test is included for verification. It is demonstrated that the destructive load of closed fixture is higher than 260 kN and the design requirements are satisfied either. The lightweight carbon fiber based closed fixture is an upgrading product of UHV live working and has great engineering value.