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我厂的M5M型万能工具磨床是五十年代初期的产品,砂轮轴轴承是油楔式三瓦调位动压轴承。这种轴承是依靠主轴和轴承作相对运动时,在轴承间隙中形成一层具有压力的油膜,将主轴浮起并承受外力的。因此,当主轴静止或转动速度不够高时,无法形成压力油膜,从而出现半干摩擦,造成主轴、轴承的摩擦和磨损,工作寿命低。此外,轴与轴瓦的间隙调整困难。间隙小了容易抱轴,间隙大了加工工件精度和光洁度不高,特别是靠端面时易发生故障。现改为双面薄膜反馈节流静压轴
My factory M5M universal tool grinding machine is the early 1950s products, the wheel shaft bearing is wedge-type three-tile adjustable hydrodynamic bearings. This bearing is relying on the spindle and bearing for relative movement, the formation of a layer of pressure in the bearing clearance of the oil film, the main shaft to float and withstand external forces. Therefore, when the spindle is still not moving or turning speed is not high enough, the formation of pressure oil film, resulting in semi-dry friction, resulting in spindle, bearing friction and wear, low working life. In addition, the shaft and the bearing gap adjustment difficult. Small gap easy to hold the shaft, the gap is large The accuracy and finish of the workpiece is not high, especially prone to failure by the end face. Now double-sided film feedback throttle static pressure axis