目前,外圆磨床的主轴轴承,绝大多数是动压滑动轴承。动压轴承在一定的转速下形成油膜,将轴与轴承的两个摩擦面分开,结构简单,承载能力较大,但油膜的刚性不足,抗振性能较差,回转精度不高。同时,在主轴启动和停止转动之前,由于油膜尚未形成或已经消失,还会发生接触摩擦,影响到轴承的使用寿命。 At present, the cylindrical grinding machine spindle bearings, the vast majority of dynamic pressure sliding bearings. The dynamic pressure bearing forms the oil film under a certain rotational speed, which separates the two friction surfaces between the shaft and the bearing. The structure is simple and the bearing capacity is relatively large. However, the rigidity of the oil film is insufficient, the anti-vibration performance is poor and the rotational accuracy is not high. At the same time, before the spindle starts and stops rotating, due to the oil film has not formed or has disappeared, contact friction will occur, affecting the bearing life.