牙轮钻头球轴承设计应考虑的两个问题

为保证钻头轴承设计更加可靠，在球轴承设计中，应考虑球轴承的工作状态对整个钻头轴承系统的影响和轴承系统在使用过程中的磨损量对球轴承工作状态的影响。由于球轴承工作状态不同，正确设计和确定轴承结构参数与游隙至关重要。游隙过小或过大都将影响轴承系统的正常工作。据此，应先进行球轴承无游隙设计计算，然后通过对无游隙计算值的修正，来保证球轴承游隙既能满足轴承系统对间隙的要求，同时消除轴承系统磨损量造成的不利影响，又使游隙的最大值尽可能小，以防轴承内部的碰撞冲击导致轴承的损坏。为此给出了相关的算式和算例。

Two problems in designing ball bearing of cone bit Ren Runan

s To ensure the design reliability of a cone bit two problems should be considered in designing the ball bearing 1 the effect of the working condition of ball bearing on the bearing system of the bit 2 the effect of the amount of wear of bearing system on the working condition of the ball bearing． These two problems are discussed in detail． Since it is of great importance to determine correctly the structural parameters and working clearance of the ball bearing the method for designing the working clearance of the ball bearing is presented．