TiNiNb形状记忆合金环强化断路器操作机构应力强度研究

Stress Strength of TiNiNb Shape Memory Alloy Ring Enhanced Circuit Breaker Operating Mechanism

将TiNiNb形状记忆合金环安装在断路器操作机构上,利用形状记忆合金环的记忆效应和超弹性,起到加强断路器操作机构强度的作用。文中将对TiNiNb形状记忆合金环强化断路器操作机构的应力强度进行研究,笔者首先给出了合金环的初始参数和扩径过程,然后建立简化形状记忆合金环及断路器操作机构杆件的应力强度数学模型,分析在安装过程中形状记忆合金环与短路器操作机构杆件之间紧固力及应力强度,最后通过计算,研究形状记忆合金环与短路器操作机构杆件之间紧固力及应力强度。

TiNiNb shape memory alloy ring is installed on the circuit breaker operating mechanism to enhance the intensity of the operating mechanism by means of the memory effect and superelasticity of the ring. In this paper, the stress intensity of the circuit breaker operating mechanism enhanced by TiNiNb shape memory alloy ring is investigated.The initial parameters and hole enlargement process of the alloy ring are offered,then a mathematical stress intensity model of the simplified shape memory ahoy ring and the bar of circuit breaker operating mechanism is built to analyze and calculate the fastening force and stress intensity between the bar and the ring in the process of installation.