Abstract: Based on the dynamic theory of rolling bearings, the nonlinear dynamic equations and friction power consumption mathematical models are established for double-row tapered roller bearings. Fine integral method and predict-correct Adams-Bashforth-Moulton multi-step method are used to solve the equations. The influences of different working conditons, structural parameters and process parameters on bearing friction power consumption are analyzed. The results show that the friction power consumption increases slowly and then linearly increases with the rise in capsized moment and rotating speed. The rotating speed has an obvious effect on friction power consumption, and a lower speed should be selected as much as possible under the premise of meeting the operating requirements. The increase in lateral load ratio makes the friction power consumption of impacted side increase and the friction power consumption of unfixed side decrease. The difference of friction power consumptions of the two sides increases. The bearing friction power consumption increases with the rise in big rim angle, and decreases with the increase in curvature radius of roller end surface. For the odd waviness orders of rollers, the friction power consumption of bearing firstly increases and then decreases with the increase in the waviness amplitude; for the even orders, the friction power consumption of bearing increases with the rise of the waviness amplitude.

Key words: mechanics, bearing dynamics, double-row tapered roller bearing, power consumption