钻井液脉冲发生器转子结构优化设计

Optimum Design of Rotor on Mud Pulse Generator

连续波钻井液脉冲发生器具有较高的传输速率,其产生的压力波信号质量主要由信号幅值和频谱特性决定,与转子形状密切相关。为了获得理想的正弦波形,以提高脉冲发生器的传输距离及信号质量,建立了三角形定/转子流通面积计算数学模型,并依据钻井液脉冲发生器脉冲幅值设计准则及压力波与正弦波最大相关系数设计准则,建立了三角形定/转子形状优化模型,同时采用Fluent软件对优化结果进行三维建模及流场仿真。仿真结果表明:优化所得三角形定/转子产生的压力波信号满足设计要求且与理想的正弦波信号近似。研究结果可为连续波钻井液脉冲发生器的结构优化提供参考。

The continuous wave mud pulse generator has a high transmission rate, and the generated pressure wave signal quality is mainly determined by the signal amplitude and spectral characteristics, which are closely re-lated to the rotor shape. In order to obtain ideal sinusoidal waveform to improve the transmission distance and signal quality ol the pulse generator, a mathematical model of the triangular stator/rotor flow area has been established. Based on the design criterion of the pulse amplitude of the mud pulse generator and the maximum correlation coeffi-cient of the pressure wave and sine wave, a shape optimization model of triangular stato^^rotor has been established. Fluent software has also been used to conduct three-dimensional modeling and flow field simulation for the optimized results. The simulation results show that the pressure wave signal generated by the optimized triangular stator/rotor meets the design requirement and approximates with the ideal sine wave signal. The conclusion could provide a ref-erence for the optimization of the continuous wave mud pulse generator.