齿轮测量仪器的动态设计方法及其应用

为了解决目前齿轮量仪中由于动态性能不足而严重影响测量结果的稳定性、可靠性和精确性的问题,对齿轮测量仪器的动态设计方法展开研究,提出利用有限元分析与实验模态分析技术相结合的动态设计方法。首先,研究了动态分析的理论基础、有限元分析的基本步骤和实验模态分析的基本原理;接着,以某齿轮快速检测仪为例,对其进行了有限元分析与实验模态分析;然后,在该齿轮快速检测仪上进行测量实验,即采用不同精度的齿轮,在不同的速度下进行测试;最后,分析了测量实验中存在振动扰动以及测量过程中振动的变化情况。实验结果表明,有限元分析法可以在设计阶段有效的提高仪器的动态性能,从根本上提高仪器的动态性能指标。实验模态分析方法可以在仪器制造以后准确的获得仪器的实际动态性能指标,可以有效地进行最佳工作转速选择,进一步提升仪器的使用性能。通过测量实验,验证了有限元分析和实验模态分析的正确,为齿轮提高齿轮量仪的动态精度提供了一种方法,为量仪的合理使用提供了一条确实可行的途径。

Dynamic design method of gear measuring instrument and its application

In order to solve the problem that poor dynamic performance of current gear measuring instruments seriously affects the stability, reliability and accuracy of measurement results, the researches on the dynamic design methods of gear measuring instruments were conducted and a dynamic design method combining finite element analysis and experiment modal analysis is put forward. First of all, the theoretical basis of dynamic analysis, the basic steps of finite element analysis and the basic principle of the experiment modal analysis are studied. Then, taking a certain gear fast measuring instrument as example, the finite element analysis and experiment modal analysis were carried out for the gear fast measuring instrument. Third, the measuring experiment was carried out on the gear fast measuring instrument, in which the gears with different precision were adopted, and the tests were carried out at different speeds. Finally, the vibration disturbance in the measurement experiments and the change of the vibration during the measurement process were analyzed. The experiment results show that the finite element analysis method can effectively improve the dynamic performance of the instrument in the design stage and can improve the dynamic performance index of the instrument fundamentally. The experiment modal analysis method can accurately obtain the actual dynamic performance index of the instrument after the instrument is manufactured, can effectively carry out the best working speed selection and further enhance the usage performance of the instrument. With the experiments, the correctness of finite element analysis and experimental modal analysis is verified, which provides a method for improving the dynamic precision of the gear measuring instrument and provide a viable way for reasonably using the measuring instrument.