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航天继电器作为一种密封的电器元件,其贮存可靠性对于导弹等武器装备至关重要。如何测试评价航天继电器在贮存过程中性能及可靠性的衰退,是继电器用户和厂家非常关心的问题。利用开发的实验系统对某型号航天继电器进行了贮存加速实验,得到了吸合时间的变化规律。分析并验证了贮存过程中吸合时间变化的主要原因是簧片应力松弛所导致的反力变化。通过仿真与实验均证实了吸合时间与簧片初力存在近似的线性关系,进而提出可采用吸合时间来表征簧片的应力松弛退化特性。建立了高温条件下继电器吸合时间的贮存退化模型,为进一步研究继电器贮存可靠性及贮存寿命预测奠定了基础。
Space relay as a sealed electrical components, the storage reliability of missiles and other weapons and equipment is essential. How to Test and Evaluate the Recession of Space Relay Performance and Reliability During Storage is a Problem that Relays Users and Manufacturers Really Care about. Using the developed experimental system, a type of aerospace relay was stored and accelerated experiment, and the changing law of the pull-in time was obtained. The main reason that the change of the pull-in time during storage is analyzed and verified is the change of reaction force caused by the relaxation of reed stress. Through the simulation and experiment, the linear relationship between the pull-in time and the initial force of the reed is confirmed, and then the pull-in time can be used to characterize the stress relaxation degradation characteristics of the reed. The storage degradation model of relay pull-in time under high temperature was established, which lays a good foundation for further research on the reliability of storage and the prediction of storage life.