自升式海洋平台提升齿轮箱啮合特性分析

Mesh characteristics analysis of the promote gearbox used in jack-up offshore platforms

为研究和改善自升式海洋平台提升齿轮箱的传动性能,在分析提升齿轮箱的结构和传动原理的基础上,采用MASTA建立分析模型,进行啮合特性分析;考虑重合度开展了提升齿轮箱宏观参数优化,分析了重合度对该齿轮箱啮合特性的变化规律。结果表明,正常提升和预压提升两种工况下,提升齿轮箱后3级各齿轮副的传递误差峰峰值偏大;优化后,各齿面最大接触应力小幅减小,各齿轮副的传递误差峰峰值总体减小,各齿轮副的啮合刚度均值总体增大,优化后提升齿轮箱的传动性能得到改善。

In order to investigate and improve the transmission characteristic of the promote gearbox used in jack-up offshore platforms,the structure and the transmission principle of the gearbox was analyzed.And then the mesh model based on MASTA was established to study the mesh characteristics of the gearbox.With the contact ratio taken into consideration,the macro geometry parameters for the transmission system was optimized and the effect of contact ration on the contact characteristics was analyzed.The results show that the p-p values of time varying transmission error of the last three stages gear pairs are too large in both normal jacking and pre-load jacking conditions before optimization;by comparison,both the maximum contact stress of the contact pair and the p-p value of time varying transmission error of each gear pair decrease after optimization,the mean value of mesh stiffness and the transmission capability of the gearbox are also improved.