【摘要】 【目的】三瓣波滚道圆柱滚子轴承通过3个滚道轮廓低点形成负游隙，可解决轴承的高速轻载打滑问题，而温度变化会严重影响负游隙的大小。为此，针对三瓣波滚道圆柱滚子轴承，基于传热学理论与滚动轴承动力学理论建立了热-力耦合的非圆滚道圆柱滚子轴承动力学模型。【方法】首先，采用“预估-校正”的吉尔刚性变步长积分算法求解了动力学微分方程组，采用有限元法求解了轴承的温度场；其次，分析了转速、环境温度、外圈安装旋转角与滚道轮廓参数等对三瓣波滚道轴承性能的影响；最后，利用航空发动机主轴轴承测试试验机进行了试验验证。【结果】结果表明，考虑热-力耦合作用后，滚子与内、外圈的接触应力增加了18%～20%；随着内圈转速的增大，考虑热-力耦合作用的保持架打滑率的增幅较小；随着环境温度的升高，基圆游隙逐渐减小，滚子与内、外圈的接触应力大幅增大；当外圈安装旋转角为60°时，承载区应力最小，轴承的额定寿命最长；滚道轮廓参数会显著影响轴承性能，当基圆半径为60.54 mm且滚道轮廓高、低点的距离为（0.173±0.007） mm时，轴承的性能较好。更多还原

【Abstract】 [Objective] The trilobe raceway cylindrical roller bearing forms a negative clearance through three low points of the raceway profile, that can solve the problem of high-speed light-load slip in bearings. However, temperature variation can significantly affect the magnitude of the negative clearance. Therefore, a thermo-mechanical coupled dynamic model for noncircular raceway cylindrical roller bearings was established for trilobe raceway cylindrical roller bearings based on heat transfer theory and rolling bearing dynamic theory. [Methods] Firstly, the dynamic differential equations were solved using the Gear stiff variable-step integration algorithm with a ‘predictor-corrector’ scheme, and the temperature field of the bearing was calculated by the finite element method. Secondly, the influences of rotational speed, ambient temperature, outer ring mounting rotation angle, and raceway profile parameters on the performance of trilobe raceway bearings were analyzed. Finally, test verification was carried out on an aero-engine main shaft bearing test rig. [Results] The results show that the contact stresses between the roller and the inner/outer races increase by 18%-20% when the thermo-mechanical coupling effect is considered. With the increase of inner ring rotational speed, the growth rate of cage slip ratio is relatively small under the consideration of thermomechanical coupling effect. As the ambient temperature rises, the base circle clearance decreases gradually, and the contact stresses between the roller and the inner/outer races increase significantly. When the outer ring mounting rotation angle is 60°, the stress in the load zone is minimized and the rated life of the bearing is maximized. The raceway profile parameters can significantly affect bearing performance, and the bearing exhibits better performance when the base circle radius is 60.54 mm and the distance between the high and low points of the raceway profile is(0.173±0.007) mm.更多还原