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Proceedings Paper

Study on the azimuth bearing scheme of a large Alt-azimuth telescope
Author(s): Huai Wang; Jingxu Zhang; Shuang Dai
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Paper 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.

Paper Details

Date Published: 14 October 2010
PDF: 6 pages
Proc. SPIE 7654, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, 76540Q (14 October 2010); doi: 10.1117/12.866726
Show Author Affiliations
Huai Wang, Changchun Institute of Optics, Fine Mechanics and Physics (China)
Jingxu Zhang, Changchun Institute of Optics, Fine Mechanics and Physics (China)
Shuang Dai, Changchun Institute of Optics, Fine Mechanics and Physics (China)


Published in SPIE Proceedings Vol. 7654:
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes
Wenhan Jiang; Myung K. Cho; Fan Wu, Editor(s)

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