转盘和水龙头主轴承寿命估算的新公式

针对现有文献给出的转盘和水龙头主轴承寿命估算公式对多种影响因素考虑不充分 ,与实际工况有一定出入的问题 ,推导出全面考虑载荷、速度、润滑、装配、工作环境和材料及表面硬度等多种影响因素 ,估算转盘和水龙头主轴承寿命的新公式。即将转盘和水龙头主轴承由变载荷工况向稳定载荷工况作等效转换 ,从而导出等效当量动载荷Pm 的计算式及主轴承寿命估算公式 ,并以 40 0 0m深井钻机水龙头主轴承为例 ,进行了疲劳寿命的估算

Nen equations for estimating life of main bearings on rotary table and swivel

The currency-used equations for calculating the life of the main bearings on rotary table and swivel take no consideration of all the affecting elements. The author offers thereby new equations that take an overall consideration of the load, rotary speed, lubrication, assembling, working environment, material and surface hadness. The variable load operating mode of the rotary table and swivel was transformed equivalently into stable load operating mode, and the equations for calculating the equivalent weight dynamic load pm and the life of the main bearings were educed. As an example, the author estimated the fatigue life of the main bearing on the swivel for 4000m rigs.