高压开关紧固螺钉预紧力拆卸力矩值异常分析与计算

Analysis and Calculation of Abnormal Moment Value of Pre-tightening Force for High-voltage Switchgear Fastening Bolt

摘要:

高压开关产品在动热稳定试验后,产品内部的部分螺钉在拆卸时,所需的力矩值小于紧固时的标准力矩;而温度的变化会对螺钉紧固的力矩值产生影响。为此,针对振动载荷与温度的变化对力矩的影响进行原因分析与理论论证。

Abstract:

This paper analyzes the reasons for the abnormal moment value of the pre-tightening force and dismantling torque of high-voltage switch fastening bolts, and calculates the pre-tightening force of the bolts under the influence of vibration load and temperature change. The theoretical model of bolt pre-tightening force under alternating load is established, and the minimum pre-tightening force value of the bolts is determined to ensure the reliability of high-voltage switches.