Analysis on Parameters and Design of Membrane-type Restrictors

• Main Authors: Chang, Ting Yu, 張庭瑜
• Other Authors: Ling, Shin Chieh
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/and947

碩士 === 國立清華大學 === 動力機械工程學系 === 103 === In order to achieve high precision machining, hydrostatic bearing are frequently adopted in many machine tools design. Restrictor which can compensate pressure plays an important role in the hydrostatic bearing system. The performance of the hydrostatic bearing is highly dependent on the design of restrictors. The design of membrane-type restrictor, one of the self-compensation restrictors which can provide higher bearing stiffness than passive restrictors is studied. In this study, it is of interest to study effects of parameters on the performance of the bearing system. And such that a proper way to design restrictors for associated bearing system can be identified. The parameters studied include materials of the membrane, restrictor clearance and the geometry of the restrictor. Based on the theory and simulation program, the effects of parameters on bearing performance can be studied and then the optimal parameters of the membrane-type restrictor can be identified for a desired single pad bearing. Concerning about the endurance failure of the membrane and the manufacturing imperfect of the restrictor, a spring is adopted to adjust the deformation of the membrane by preloading. The performance of the spring-membrane-type restrictor is also be simulated. A test bench of membrane-type restrictor is designed to verify the simulation result. These results provide a formulation for the design of membrane-type restrictor.