论文部分内容阅读
滚动轴承牙轮钻头因摩擦扭矩小和摩擦发热低， 在与牙轮钻头的高速化进程中具有独特的优势。基于这种认识， 对现用牙轮钻头的圆柱滚子轴承进行了理论研究。从结构设计的角度探讨了采用满装型圆柱滚子轴承结构的可行性； 应用经典弹性理论， 计算了满装型结构的载荷分布； 以基本额定动载荷Ｃｒ 作为初期优化的目标函数， 选取４ 个设计变量， 分别采用复合形法、内点罚函数法和外点罚函数法对牙轮钻头圆柱滚子轴承进行了优化设计。研究表明， 现用牙轮钻头圆柱滚子轴承的确存在一些有待改进和完善之处； 所编制的结构设计计算、载荷分布和优化设计程序可直接用于对国内各种尺寸滚动轴承钻头的理论研究。
Rolling bearing roller cone bit due to small friction torque and low friction, and roller cone bit in the process of speed has a unique advantage. Based on this understanding, the theoretical research on the cylindrical roller bearing of the current cone bit is carried out. From the perspective of structural design, the feasibility of using fully loaded cylindrical roller bearing structure was discussed. The classical elastic theory was used to calculate the load distribution of full structure. With the basic dynamic load rating Cr as the objective function of initial optimization, four A design variable was used to optimize the design of roller cone cylindrical roller bearings by complex method, point penalty function method and external penalty function method respectively. The research shows that there are some problems needing improvement and improvement for the roller cone roller bearing nowadays. The structural design calculation, load distribution and optimization design program can be directly applied to the theoretical research of various sizes of rolling bearing bits in China.