轧辊磨床动压轴承承载能力数值计算

Numerical Calculation of Dynamic Bearing Capacity in Roll Grinder

由于某轧辊磨床动压轴承的油膜起点不在连心线处,在计算过程中,当设定的轴承偏位角不同时,油膜起点的角度则不相同,因此通过建立动压轴承二维雷诺方程的数学模型,求得动压轴承的压力分布,则可以获得动压轴承中间断面上的压力分布值;把它沿载荷方向与垂直载荷方向分解,通过MATLAB软件拟合该分布值的曲线方程,再运用准二维问题求解其承载能力;当垂直载荷方向上的分量接近零时,则设定的偏位角为轴承的实际偏位角,在该偏位角下求得沿载荷方向的承载分量即为轴承的承载量。该计算极大地简化了运算过程。

As the oil film starting point of dynamic bearing in roll grinder is not line of centres,in the calculation process, when setting attitude angle is difference,the angle of oil film starting point is not same. The mathematical model was established for two-dimensional dynamic bearing based on Reynolds equation,pressure distribution of dynamic bearing was obtained,so pressure value distribution of dynamic bearing on mid-section was gained,which was decomposed into along the load direction and vertical to the load direction. The curve equation of the pressure value distribution was fitted by MATLAB software,bearing capacity was obtained by the quasi-two-dimensional problem. The setting attitude angle was equal to the actual attitude angle of bearing when loading component on vertical to the load direction was close to zero,loading component along the load direction was the actual loading capacity of bearing at the setting attitude angle. The calculation greatly simplifies the operation process.