Abstract
As a kind of common phenomenon in practical engineering, misalignment error considerably changes the working performance of bearing. However, it has rarely attracted attention in the study of duplex angular contact ball bearings (DACBBs). To evaluate the influence of misalignment on DACBB, an analytical model of DACBB considering combined loads and angular misalignment is established for back-to-back, face-to-face, and tandem configurations. According to the geometrical relationship inside the bearing, the deformations caused by external load and angular misalignment are systematically analyzed. On this basis, the effects of external load, axial preload, and angular misalignment on the displacement, maximum contact load, contact load distribution, contact angle, and fatigue life of DACBB are analyzed. The results demonstrate the high dependence of the contact load and contact angle on the above factors. Angular misalignment causes the fluctuation of contact load and contact angle distributions along the azimuth angle of a rolling ball. Nonlinear relationships between fatigue life of DACBB, angular misalignment, and axial preload are obtained. The occurrence of angular misalignment considerably decreases the fatigue life of DACBB. The results suggest the necessity of angular misalignment analysis for DACBB.
Highlights
As one of the most important supporting components in transmission systems, angular contact ball bearings (ACBBs) are widely used in numerous rotating machinery systems for their high reliability and high precision
Owing to main shaft deflection, mounting error, and geometric inaccuracy, duplex angular contact ball bearings (DACBBs) commonly runs with angular misalignment [35,36,37,52]
16, the results suggest the nonlinear dependence of fatigue life on of external radial load, the fatigue life of DACBB significantly decreases at lower angular both misalignment, radial load and angular misalignment
Summary
As one of the most important supporting components in transmission systems, angular contact ball bearings (ACBBs) are widely used in numerous rotating machinery systems for their high reliability and high precision. In such applications, a single row ACBB is often assembled into a duplex angular contact ball bearing (DACBB) to improve the stability of the bearing-rotor system. DACBB shows certain advantages over ACBB in terms of rigidity, rotating accuracy, and load-carrying capacity [1]. It has been widely adopted in automotive wheels, compressors, turbines, centrifugal pumps, and machine tool spindles [2,3,4]. With deepening research in rolling bearings, lots of researchers [8,9,10,11,12,13]
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