井下微型行星齿轮减速器的设计优化

Design and Optimization of Downhole Micro-planetary Gear Reducer

针对井下切割工具用减速器要求承载能力好、体积小、高温稳定性好、外壳耐腐蚀的特点,首先根据仪器需求及机械设计手册设计要求确定了井下高温微型行星齿轮减速器的原始参数,再基于MATLAB优化设计,应用MATLAB函数BNB20对行星齿轮减速器进行两次优化设计,其中第一次优化的求解思路是先将问题视为一般非线性整数连续优化设计问题来处理,而后进行圆整计算。第二次优化将问题转化为非线性整数优化设计问题,得到的解不用圆整即符合要求,更加合理。优化后在传动载荷不变的情况下,减速器体积减少了20%。通过加工样机进行测试,设计的行星齿轮减速器能够稳定运行并提供扭矩,证明了此设计过程的正确性和可靠性,为井下用高温微型行星齿轮减速器的设计提供了完整的设计过程和计算方法。

Aiming at the expectation of high bearing capacity,small size,high temperature stability and corrosion resistence for reducer used in downhole cutting tool,the original parameters of the downhole high temperature micro planetary reducer are determined according to the practical requirements and general mechanical design firstly.Then based on the Matlab optimization design,the paper applies Matlab function BNB20 to carry on optimization design to the planetary gear reducer twice.The first optimization is to treat the problem as a general non-linear integer continuous optimization design,and then to carry out the round calculation.The second optimization transforms the problem into a nonlinear integer optimization design.The solution is more reasonable and the reducer volume is reduced by 20%after optimization.Through testing of the prototype,the planetary reducer can run stably and provide torque,which proves the correctness and reliability of the design process.It provides a complete design process and calculation method for the design of downhole high temperature micro planetary reducer.