耐受大温差的转动连接分析与设计方法

Analysis and Design Method for Rotational Linkage Bearing Big Difference in Temperature

针对转动连接在大温差等复杂环境下的使用要求,在理论分析基础上提出一种对由深沟球轴承或角接触轴承所构成定位预紧轴系的分析与设计方法。该方法用计算机辅助设计软件绘制出由轴承的径向间隙、轴向位移、滚珠和滚道之间最大接触应力等确定的轴承安全区域图,并根据轴系的具体结构、材料及配合形式等条件绘制出温度变化时轴承径向间隙与轴向位移之间的变化关系图即轴承间隙变化图;将轴承间隙变化图集成到轴承安全区域图中,确定出两图交集最大时轴承间隙变化图与轴承安全区域图之间的相对位置;利用由该相对位置给出的数据求出轴系的各待定参数,完成轴系分析与设计。应用该方法对某空间转动关节轴系进行分析与设计,验证了该方法在实际中的有效性。

A new analysis and design method for rotational linkage which is made up of two rolling bearings is proposed. This method is specific for rotational linkage used in complicated environment with big temperature difference. Firstly,by using parameters such as the bearing＇s radial clearance,axial displacement,maximal contact stress between balls and groove,the bearing safety map is drawn. By using information of the structure,material and fit form of the bearing system,the bearing clearance map is drawn. Secondly,the bearing clearance map is integrated into the bearing safety map and the relative position of the two maps is adjusted to make them have a maximal overlap. Lastly,the needed parameters of the bearing system are worked out according to the relative position between the bearing clearance map and the bearing safety map. The validity of this method is demonstrated by the development of the bearing system of a space joint.