Author(s)

M. Ricci

Abstract

A numerical procedure for internal loading distribution computation in statically loaded, single-row, angular-contact ball bearings, subjected to a known combined radial and thrust load, which must be applied so that to avoid tilting between inner and outer rings, is used to find the load distribution differences between a loaded unfitted bearing at room temperature, and the same loaded bearing with interference fits, such might experience radial temperature gradients between inner and outer rings. For each step of the procedure it is required the iterative solution of Z + 2 simultaneous non-linear equations – where Z is the number of the balls – to yield exact solution for axial and radial deflections, and contact angles. Keywords: ball, bearing, static, load, numerical, method, temperature, fit. 1 Introduction Ball and roller bearings, generically called rolling bearings, are commonly used machine elements. They are employed to permit rotary motions of, or about, shafts in simple commercial devices such as bicycles, roller skates, and electric motors. They are also used in complex engineering mechanisms such as aircraft gas turbines, rolling mils, dental drills, gyroscopes, and power transmissions. This work is devoted to study of the internal loading distribution in statically loaded single-row angular-contact ball bearings. Several researchers have studied the subject as, for example, Stribeck [1], Sjoväll [2], Jones [3] and Rumbarger [4]. The methods developed by them to calculate distribution of load among the balls and rollers of rolling bearings can be used in most bearing applications because rotational speeds are usually slow to moderate. Under these speed conditions, the effects of rolling element centrifugal forces and gyroscopic

Keywords

ball, bearing, static, load, numerical, method, temperature, fit