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近几年来,静动压轴承的研制成功,为精密机床主轴系统提供了新型的轴承。该轴承兼有静压轴承和动压轴承的优点。笔者将台阶式油楔静动压轴承的原理,应用于精密磨床砂轮主轴轴承的改装中,取得了较好的效果。一、台阶式油楔静动压轴承图1为台阶式油楔静动压轴承的结构简图。h_0为轴承封油面和主轴间的半径间隙,h_1为轴承油腔表面与主轴间的深度。压力油P_s进入轴承的环槽中,通过油腔h_1和间隙h_0沿轴向流出轴承,回到油池. 1.静压效应的形成如图2a,当主轴中心与轴承中心相重合时,压力油P_s通过上下油腔的压降相等,压力分布如图所示。其中,P_上=P_下,因此轴承上下油腔作用在主轴上的
In recent years, the successful development of hydrostatic bearings, precision machine tool spindle system provides a new type of bearing. The bearing both hydrostatic bearings and hydrodynamic bearings advantages. The author will step wedge hydrostatic pressure bearing principle, used in precision grinding wheel spindle bearings modified, and achieved good results. First, the step-type oil wedge hydrostatic bearing Figure 1 for the step-wise oil wedge hydrostatic bearing structure diagram. h_0 is the radial gap between the oil seal surface and the main shaft of the bearing, h_1 is the depth between the surface of the oil chamber of the bearing and the main shaft. The pressure oil P_s enters the ring groove of the bearing and flows out of the bearing through the oil chamber h_1 and the gap h_0 back to the oil sump 1. The formation of static pressure effect As shown in Figure 2a, when the center of the main shaft coincides with the bearing center, the pressure The pressure drop of oil P_s through the upper and lower oil chambers is equal and the pressure distribution is as shown in the figure. Among them, P_ on = P_, so the upper and lower bearing oil on the role of the spindle