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DEVELOPMENT OF AEROSTATIC GUIDE WITH HIGH STIFFNESS AND HIGH PERFORMANCE MADE OF PARTIALLY POROUS FINE CERAMICS

部分多孔精细陶瓷高刚度高性能航空导流板的研制

基本信息

批准号：
16560120
负责人：
FUJII Masahiro
金额：
$ 2.05万
依托单位：
OKAYAMA UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2005
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16560120/
关键词：
partially porous body porous ceramics aerostatic guide static stiffness plating pressure distribution deflection Porous ceramics Aerostatic guide Static stiffness Plating Pressure distribution

项目摘要

While both friction and wear are small in an aerostatic guide, the stiffness is comparatively small. Porous materials are used as a restrictor to improve stiffness in an aerostatic guide. In this study a partially porous ceramics, which was made with a special manufacturing process, was applied to the aerostatic guide. The boundary between the porous part and the fine part of the ceramics was seamless, and the porosity and the pore size were able to be controlled flexibly. The fundamental static characteristics of the aerostatic guide made of the partially porous ceramics were evaluated. In addition electroless plating was treated onto the porous ceramics surface for the purpose of obtaining high static stiffness, and the effect of plating on the static stiffness was examined. In addition the deflection of ceramics would occur by the pressurized air. The influence of deflection of porous ceramics on static characteristics was also evaluated. The obtained results were as follows : 1.Even in case of the non-plated ceramics, the maximum dimensionless static stiffness was enough to be used for the aerostatic guide. In case of the plated ceramics both the flow rate and the clearance decreased. Consequently, the high stiffness was obtained by the plating. 2.The minimum clearance where the maximum dimensionless static stiffness was obtained varied little with the deflection of porous ceramics. Therefore, the minimum clearance was suitable as the representative clearance. 3.The maximum dimensionless static stiffness and the load capacity estimated with the minimum clearance were decreased by the deflection of the porous ceramics. 4.The maximum dimensionless static stiffness and the load capacity could be arranged in order with the ratio of the deflection to the apparent clearance. 5.The partially porous ceramics employed in this study would be able to be applied to aerostatic guides.

虽然在空气静压导轨中摩擦和磨损都很小，但刚度相对较小。多孔材料被用作限流器以提高空气静力引导件中的刚度。本研究将一种特殊制造工艺制成的部分多孔陶瓷应用于空气静压导轨。陶瓷的多孔部分和细孔部分之间的边界是无缝的，并且能够灵活地控制孔隙率和孔径。评价了部分多孔陶瓷空气静压导轨的基本静态特性。此外，为了获得高的静态刚度，对多孔陶瓷表面进行了化学镀处理，并考察了镀层对静态刚度的影响。此外，陶瓷材料在压缩空气的作用下会发生挠曲变形。研究了多孔陶瓷的变形对静态特性的影响。研究结果表明：1.即使在陶瓷材料未镀覆的情况下，其最大无量纲静刚度也足以满足空气静压导轨的要求。在镀覆陶瓷的情况下，流量和间隙均减小。因此，通过电镀获得了高刚度。2.获得最大无量纲静刚度的最小间隙随多孔陶瓷的挠度变化不大。因此，最小间隙适合作为代表性间隙。3.最大无量纲静态刚度和最小间隙估计的负载能力被多孔陶瓷的偏转降低。4.最大无量纲静刚度和最大承载力可按挠度与表观间隙之比的大小排序。5.本研究所采用的部分多孔陶瓷将能够应用于空气静压导轨。