CAJ | 학술논문

以航天机构中的输出轴系组件为研究对象，提出适应交变温度和大温差特殊空间环境的空间轴承可靠运行的分析与设计方法。此方法在考虑轴系材料属性、轴承排列方式和预紧方式的基础上，利用材料热变形和位移变形协调关系，建立轴承径向间隙与预紧力随交变温度变化的数学模型。在此模型的基础上，分析交变温度对空间轴承的径向间隙和预紧力演化规律的影响。以角接触球轴承71807C为例，提出以轴承实际接触角、径向间隙、预紧力和装配压力作为轴系运行可靠性指标，定性分析极端温度下轴承可能面临的多种失效模式。为确保轴承可靠运行，确定其初始安装过盈配合量和预紧力的选择范围。此研究方法为空间轴承安装设计提供了理论参考，其分析结果图形可以清晰表达满足运行可靠性条件的安装区域。
이항천궤구중적수출축계조건위연구대상，제출괄응교변온도화대온차특수공간배경적공간축승가고운행적분석여설계방법。차방법재고필축계재료속성、축승배렬방식화예긴방식적기출상，이용재료열변형화위이변형협조관계，건립축승경향간극여예긴력수교변온도변화적수학모형。재차모형적기출상，분석교변온도대공간축승적경향간극화예긴력연화규률적영향。이각접촉구축승71807C위례，제출이축승실제접촉각、경향간극、예긴력화장배압력작위축계운행가고성지표，정성분석겁단온도하축승가능면림적다충실효모식。위학보축승가고운행，학정기초시안장과영배합량화예긴력적선택범위。차연구방법위공간축승안장설계제공료이론삼고，기분석결과도형가이청석표체만족운행가고성조건적안장구역。
Studying output shafting in spacecraft mechanism, the analysis and design methods of the reliable operation of space bearing are proposed, which can adapt special environment with alternating temperature and large temperature difference. Based on the relation between thermal deformation of material and displacement coordination, the mathematical model of bearing clearance and preload which change with alternating temperature is established, concerning the material properties of shafting, arrangement style of bearings and preloading. Based on the model, the influence of alternating temperature to the evolution law of bearing used in space between clearance and preload is analyzed. Case with angular contact bearings 71807C, the operation reliability indexes of shafting are proposed, which contain the practical contact angle, radial clearance, preload and the stress between fitting surfaces, and obtained multiple failure modes which the bearing may be faced with in extreme temperatures. To insure of reliable operation of the bearings, the bound of the initial interference fitting and preload are obtained. The methods provide the theoretical reference for space bearing installation, and the graphic results can express the installing regions meeting the conditions of operational reliability.