13 October 2010 Study on the azimuth bearing scheme of a large Alt-azimuth telescope
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Proceedings Volume 7654, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes; 76540Q (2010) https://doi.org/10.1117/12.866726
Event: 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies, 2010, Dalian, China
Abstract
The azimuth bearing schemes in typical large Alt-azimuth telescopes, especially the 3.5-m APO telescope and the 4.1-m SOAR telescope were analyzed. A scheme of high-angular contacted thrust ball bearing integrated with a radial ball bearing was put forward. According to the Hertz contact theory, the corresponding parameters were designed for engineering application. The static performance parameters, within the range of 60° ~ 85° original contact angle were calculated. Compared with the traditional plane thrust ball bearing, the results shows that the high-angular (α>80°) contact thrust ball bearing has more benefits at bearing strength and rigidity for large telescope. The Φ1500mm diameter prototyping bearing shows good performance, including the axial jitter is 0.009mm, the radial jitter is 0.006mm, the maximum starting torque without load is 30N•m, and the load capacity is more than 30t, which offers advanced technique path for the buildup of the high precision azimuth shafting and the whole telescope system.
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Huai Wang, Jingxu Zhang, Shuang Dai, "Study on the azimuth bearing scheme of a large Alt-azimuth telescope", Proc. SPIE 7654, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, 76540Q (13 October 2010); doi: 10.1117/12.866726; https://doi.org/10.1117/12.866726
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