氧化锆氧传感器减振技术研究

Research on vibration reduction technology of zirconia oxygen sensor

针对氧化锆氧传感器在大量级冲击试验中发生的失效情况,对传感器结构进行改进设计,确保氧化锆氧传感器在1200 gn试验条件下能够安全、可靠工作。有限元仿真分析的结果表明,改进结构后传感器在冲击试验中三个轴向应力较改进结构前的应力明显下降,降低幅度约为50%;通过试验样件验证表明,改进结构后传感器进行冲击试验过程中,探头部分所受量级可降至500 gn以下,较改进结构前量级降低约为50%以上。通过有限元仿真和试验验证可知改进结构后的传感器具有良好的减振缓冲作用,提高了产品的耐冲击能力。

Aiming at the failure of zirconia oxygen sensor in a large number of impact tests,improved design of structure of sensor is carried out to ensure that the zirconia oxygen sensor can work safely and reliably under the test condition of 1200 gn.The results of the finite element simulation analysis show that the three axial stresses of the sensor after the improvement of the structure in the impact test are significantly lower than those before the improvement of the structure,and the reduction range is about 50%;through the verification of the test samples,it is shown that the magnitude of the probe part can be reduced to less than 500 gn,which is about 50%lower than that before the improvement of the structure.Through the finite element simulation and experimental verification,it shows that the improved structure of the sensor has a good damping and buffering effect,and the impact resistance of the product is improved.