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球面滚子轴承内套中挡边高度hn,是其轴截面内半径为R_1、R的两圆弧交点A到相对滚道基准端面B的垂直距离(图1)。两圆弧交点A在加工油沟时被切去,所以hn无法直接测量。若在两圆弧之间放入一个已知半径r的标准钢球,测出钢球顶点到基准端面B的垂直距离K_(bn),然后通过计算,即可间接求出两圆弧交点A与基面B之垂直距离hn的数值(图2)。一、公式推导(图2) 由零件设计图纸给定了R_1、R、r、N0、OW、PD、QA及AF的尺寸,测得K_(hn),即可求出hn。
Spherical roller bearing inner wall height hn, is the axial cross-section of the radius R_1, R of the two circular arc intersection A relative to the raceway reference end face B of the vertical distance (Figure 1). The intersection point of the two arcs A is cut off when processing the oil groove, so hn can not be directly measured. If a standard ball with a known radius r is placed between the two circular arcs, the vertical distance K_ (bn) between the apex of the steel ball and the reference end face B is measured, and then the intersection of the two circular arcs A And the basal plane B the value of the vertical distance hn (Figure 2). First, the formula derived (Figure 2) Design drawings given by the parts R_1, R, r, N0, OW, PD, QA and AF size, measured K_ (hn), can be obtained hn.