A Hydrostatic Tilting Rotary Table Design

• Main Authors: Lin, Cheng-Hsueh, 林政學
• Other Authors: Sung, Cheng-Kuo
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/8488f9

碩士 === 國立清華大學 === 動力機械工程學系 === 105 === This thesis is aimed to design and fabricate a hydrostatic tilting rotary table with high loading capacity, high stiffness. According to the desired performance specifications and its application, we selected the proper type of hydrostatic bearing and analyzed the performance by experiments. This study started from design based on the desired performance and focused on calculating the flow resistance of the pockets and restrictors to obtain the optimal pressure ratio between the source and the pocket, which resulted in the required bearing stiffness. Secondly, this study determined the number and dimensions of the pockets to gain the desired load capacity of the single-pad and the opposed-pad hydrostatic bearings. In addition, this thesis inspected the pressure distribution of oil film under eccentric condition by using finite difference method and obtained the essential parameters such as resistance, the oil film thickness, the land dimension, the oil viscosity, the total flow. Finally, the hydrostatic tilting rotary table was examined by using sensors and oil supply system, and compared the actual performance with the theoretical prediction to explore the possible parameters of error and present a method to improve the performance of hydrostatic tilting rotary table.