异形单牙轮钻头的传动比计算仿真模型研究

在牙轮钻头的几何关系以及动力学和运动学基础上,通过牙轮工作过程中的运动平衡和力矩平衡,建立牙齿与岩石的相互作用力以及牙轮扭矩、角速度、角加速度仿真模型。在仿真中将牙轮钻头连续转动过程离散化,通过对每个瞬时离散点的传动比的计算得到钻头的平均传动比。仿真模型中将牙轮钻头结构、岩石特性等参数综合考虑,使仿真模型更加贴切钻头实际钻进环境。仿真出来的平均传动比值对牙轮钻头设计、分析提供一定的参考依据。

Research on rolling ratio model of one-cone bit

Based on the geometry,dynamic and kinematics of cone bit,through the analysis of kinetic balance and torque balances at the working course of cone,the interaction between teeth and rock,torque on cone,angular velocity and angle acceleration of cone are built.The rolling progress of roller bit is discretized.After calculating the rolling ratio of each discrete point,the average rolling ratio of bit is got.Comprehensively considering the parameters of the structure of cone bit and the rock property,the simulation models are more close to the actual situation.The simulation result of average ratio can provide some references for the bit design and research.