钢制和陶瓷圆柱滚子轴承高速性能的有限元分析

在高速圆柱滚子轴承理论研究的基础上,对普通钢制轴承和陶瓷轴承进行有限元分析,研究了转速对接触应力和等效应力的影响.结果表明,高速轴承的疲劳寿命主要取决于滚动体作用于外圈的离心力,减小滚动体离心力是提高此类轴承寿命的最有效途径;在中、低速时,钢轴承的寿命和可靠性均好于陶瓷轴承.但当转速达到高速时,陶瓷轴承在寿命方面显示出更大的优势.为陶瓷轴承的设计与应用提供参考.

Finite element analysis on high speed performance of cylindrical roller bearings made of steel and ceramics

On the basis of theoretical study on the high speed cylindrical roller bearing a finite element analysis was carried out on the common steel bearings and the ceramics bearings, and the influence of rotary speed on the contacting stress and the equivalent stress. The result shows that the fatigue life-span is mainly depending on the centrifugal force acted on the outer ring by the rolling body, and decreasing the centrifugal force of rolling body is the most effective way for enhancing the life-span of this kind of bearings. While at the times of middle and low speed the life-span and reliability of steel bearings are better than those of ceramic bearings. But while the rotary speed reaches to the high speed the ceramic bearings revealed more advantages in the respect of life-span. Thus references on the design and application of ceramic bearings were provided.