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    • 2. 发明申请
    • PREDICTION OF RELUBRICATION INTERVAL
    • 重建间隔预测
    • WO2009138106A1
    • 2009-11-19
    • PCT/EP2008/003861
    • 2008-05-14
    • AB SKFLUGT, Pieter, Martin
    • LUGT, Pieter, Martin
    • G01M13/04
    • G06F17/5018G01M13/04G01M13/045
    • The invention relates to a method of predicting when a grease in a grease- lubricated rolling element bearing (10) will reach an unacceptable condition. According to the invention, a time series of a parameter is measured and recorded, whereby the parameter is directly or indirectly indicative of a degree of breakdown of a lubricant film separating the rolling contacts. With the aid of processing means (22), the time series is analyzed, a dynamic model is constructed that predicts the evolution of parameter values, and the model is used to extrapolate the time series. A time at which a predefined limit will be exceeded is then determined from the extrapolated time series, whereby the predefined limit is representative of unacceptable grease condition. The method according to the invention can be used to predict a relubrication interval for an individual grease-lubricated bearing.
    • 本发明涉及一种预测润滑脂润滑的滚动体轴承(10)中的润滑脂何时将达到不可接受的状态的方法。 根据本发明,测量和记录参数的时间序列,由此参数直接或间接地指示分离滚动接触件的润滑剂膜的击穿程度。 在处理手段(22)的帮助下,分析了时间序列,构建了一个预测参数值演化的动态模型,并用模型推断时间序列。 然后从外推时间序列确定将超过预定极限的时间,由此预定义的极限代表不可接受的润滑脂状况。 根据本发明的方法可以用于预测单独润滑脂润滑的轴承的再润滑间隔。
    • 3. 发明申请
    • DETERMINING HYDROSTATIC LEAKAGE
    • 测定水位泄漏
    • WO2009135639A1
    • 2009-11-12
    • PCT/EP2009/003204
    • 2009-05-05
    • AKTIEBOLAGET SKFLUGT, Pieter, MartinLARSSON, RolandSAHLIN, Frederik
    • LUGT, Pieter, MartinLARSSON, RolandSAHLIN, Frederik
    • G01B21/30G01M13/00
    • G01M13/005
    • A method of predicting the hydrostatic leakage (Q) between a seal and a counter face, wherein the seal comprises a first surface portion and the counter face comprises a second surface portion and, in use, the first surface portion contacts the second surface portion and allows hydrostatic leakage (Q) of a fluid between a first region and a second region separated by the seal, the method comprising the steps of : determining a value of S vm , wherein S vm is the depth of the lowest valley in a measured roughness profile of the first surface portion relative to a mean line of the roughness profile, or wherein S vm is the average depth of two or more of the lowest valleys in the roughness profile relative to the mean line; predicting the hydrostatic leakage (Q) based on the value of S vm .
    • 一种预测密封件和对置面之间的静水泄漏(Q)的方法,其中所述密封件包括第一表面部分,并且所述对置面包括第二表面部分,并且在使用中,所述第一表面部分接触所述第二表面部分和 允许在由密封件分开的第一区域和第二区域之间的流体的静水泄漏(Q),所述方法包括以下步骤:确定Svm的值,其中Svm是测量的粗糙度轮廓中的最低谷的深度 相对于粗糙度轮廓的平均线的第一表面部分,或其中Svm是粗糙度轮廓中相对于平均线的两个或更多个最低谷中的平均深度; 基于Svm的值预测流体静力泄漏(Q)。
    • 7. 发明申请
    • BEARING WITH MODIFIED SPHERICAL GEOMETRY
    • 轴承与修改的球形几何
    • WO2012083981A1
    • 2012-06-28
    • PCT/EP2010/007828
    • 2010-12-21
    • AKTIEBOLAGET SKFLUGT, Pieter, MartinVAN ZOELEN, MarcoVENNER, Cornelis Henricus
    • LUGT, Pieter, MartinVAN ZOELEN, MarcoVENNER, Cornelis Henricus
    • F16C23/08F16C33/36F16C33/58
    • F16C33/36F16C19/38F16C23/086F16C33/585F16C33/6681
    • The present invention relates to a rolling element bearing having spherical rolling contact surfaces, in which one or more of the spherical rolling contact surfaces deviates from the pure spherical in a longitudinal direction (y). The bearing comprises rolling elements (225), which have a first rolling contact surface (226), and inner an outer bearing raceways, which have a second rolling contact surface. According to the invention, at least one of the first and second rolling contact surfaces, which together form a contact interface, has a modified radius of curvature (r y,rol(y) ) which varies in longitudinal direction (y), such that a reduced (composite) radius of curvature of the contact interface varies according to a predetermined relationship. Specifically, the aforementioned reduced radius of curvature of the contact interface is maximized at the centre of the contact (y = 0), and varies along the contact length according to a cosine function. The resulting contact geometry minimizes a pressure gradient across a central region of the contact interface during elastohydrodynamic lubrication conditions, such that a side flow of lubricant away from the central region is reduced.
    • 本发明涉及具有球面滚动接触面的滚动体轴承,其中一个或多个球形滚动接触表面沿纵向方向(y)偏离纯球体。 轴承包括具有第一滚动接触表面(226)的滚动元件(225)和具有第二滚动接触表面的外部轴承滚道内部。 根据本发明,一起形成接触界面的第一和第二滚动接触表面中的至少一个具有在纵向方向(y)上变化的改变的曲率半径(ry,rol(y)),使得 接触界面的缩小(复合)曲率半径根据预定关系而变化。 具体地说,接触界面的上述缩小的曲率半径在接触中心(y = 0)处最大化,并且根据余弦函数沿接触长度变化。 所得到的接触几何形状使得在弹性流体动力学润滑条件期间穿过接触界面的中心区域的压力梯度最小化,从而减少了远离中心区域的润滑剂的侧流。