大型地平式望远镜的方位轴系支撑结构  

Azimuth shafting bearing structure in a large Alt-azimuth telescope

作　　者：王槐[1] 代霜[1] 张景旭[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033

出　　处：《光学精密工程》2012年第7期1509-1516,共8页Optics and Precision Engineering

基　　金：中科院三期创新工程专项资金资助项目

摘　　要：设计了用于2m口径望远镜的方位轴系支撑结构。通过对比大型地平式望远镜方位轴系的典型支撑结构,拟定了由向心球轴承和大接触角推力球轴承集成的一体化轴系支撑方案以及相应的轴承结构参数。依据Hertz接触理论并采用AYSYS有限元软件对60～85°不同原始接触角下的静载荷特性参数进行了理论计算和非线性仿真分析验证,结合加工工艺设计了85°接触角的推力球轴承结构。研制成功了直径为1 500mm轴承样机,其轴向跳动为0.009mm,径向跳动为0.006mm,最大空载启动摩擦力矩为30N.m,承载能力优于30t。该项设计为大型望远镜高精度方位轴系的研制提供了可靠的设计依据和技术途径。An azimuth shafting bearing structure was designed for a 2 m telescope engineering project. The typical azimuth bearing structures in large Alt-azimuth telescopes were compared, and the shafting bearing scheme for integrating a high-angular contact thrust ball bearing with a radial ball bearing was put forward. The corresponding parameters of the high-angular contact thrust ball bearing were devised. Based on the Hertz contact theory and the Finite Element Method（FEM） software ANSYS, the static performance parameters within the range of 60-85° original contact angle were calculated and validated in nonlinear simulation. The 85° high-angular thrust ball bearing structure was designed with the processing technique. A prototyping bearing with a diameter of 1 500 mm was developed firstly at home and it shows good performance in a axial run-out of 0. 009 mm, a radial run-out of 0. 006 mm, the maximum starting torque without load of 30 N · m, and the load capacity more than 30 t. The design can offer a reliable guidance and advanced technique paths for developing the high precision azimuth shaftings of large telescope systems.

关 键 词：地平式望远镜 方位轴承 支撑结构 HERTZ接触理论 ANSYS接触仿真 

分 类 号：TH751[机械工程—仪器科学与技术]