Mechanical model with detailed design parameters of a rotor slewing bearing with the structure type of double-row\ntapered roller for supporting the rotor of the wind turbine was presented. The internal geometrical relationships of the\nrotor slewing bearing were established in the Cartesian coordinate system. The elastic contact deformations between\neach tapered roller and the raceways were expressed through the geometrical transformation. The mechanical model\nwas established using the equilibrium relations in the rotor slewing bearing. The safety factor and the fatigue life which\nrepresents, respectively, the ability of resisting the rolling contact plastic deformation failure and the rolling contact fatigue\nfailure of the rotor slewing bearing were obtained based on the solution of the mechanical model. Effects of the\ndetailed design parameters such as axial clearance, contact angle, and roller semi-cone angle on the carrying capacity of\nthe rotor slewing bearing were analyzed. The results show that right amount of small negative axial clearance, increase\nin contact angle, and decrease in roller semi-cone angle are advantageous for enhancing the carrying capacity of the\nrotor slewing bearing. This provides the basis for the reasonable value selection of the design parameters of the doublerow\ntapered roller slewing bearing for supporting the rotor of the wind turbine.
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