作　　者： ; ;

机构地区： 嘉应学院电子信息工程学院

出　　处： 《机械设计》 2013年第4期48-52,共5页

摘　　要： 根据热传导原理得出深沟球轴承钢球瞬态温度分布,利用热弹性理论得出钢球瞬态应力、应变及位移的解析解,计算了钢球热变形产生的等效温度载荷,用赫兹接触理论计算了钢球和轴承内外圈之间的最大接触应力。滚动轴承钢球温度随着时间增加趋于稳定,钢球外表面比中心温度升高快。轴承钢球径向和切向应力在温升开始时刻和球心附近变化剧烈,随着时间的增加趋于0。轴承钢球径向位移在温升开始时刻和球心附近变化剧烈,钢球各点的径向位移和半径呈线性关系。采用拟合公式计算不同工作温度下深沟球轴承内外圈最大接触应力误差小于3.98%。接触应力拟合公式为深沟球轴承的合理设计和选用提供依据。 According to the theory of the thermal conduction and thermoelasticity, the paper deduces the deep groove rolling bearing steel ball transient temperature, radial and tangential stress, radial and tangential strain and radial displacement, calcu- lates the temperature load which comes from the steel ball tempera- ture deformation. By using the Hertz contact theory, the paper ob- tains the maximum contact stress formula between the steel ball and bearing inner and outer ring. The result shows the temperature of beating steel ball became stable with the increase of time. The sur- face temperature change of steel ball is faster than the center. The radial and tangential stress change violently at the begin time of heating and the surface of the ball, equals to 0 MPa at last. The beating steel ball radial displacement changes violently at the begin time of heating and the surface of the ball. The radial displacement and radius has good linear relation. The fitness formula is used to calculate the maximum contact stress between the steel ball and bearing inner and outer ring in the different temperature. The error is less than 3.98%. The fitness formula provides the foundation for the reasonable design and selection of the deep groove rolling bearing.

关 键 词： 热弹性理论 赫兹接触理论 深沟球轴承 温度变形 最大接触应力

领　　域： [机械工程]