封閉式靜壓軸承使用雙向節流器之靜態特性受設計因數之影響

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封閉式靜壓軸承使用雙向節流器之靜態特性受設計因數之影響

Influence of Design Parameters on Static Characteristics of Hydrostatic Closed-type Bearing Using Double-Action Restrictors

許家銘 , Masters　　Advisor：康淵;張永鵬　　

繁體中文

封閉式靜壓軸承；圓柱滑桿節流器；薄膜節流器； closed-type hydrostatic flat bearing ； cylindrical-spool ； membrane-type restrictor

Abstract │ Reference (16) │ Altmetrics

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This paper investigated the design methods and optimization of the hydrodynamic thrust bearings. The thrust bearings according to the shape of oil pads have two types, which are stepped-land and tapered-land. For numerical computation, substituting known conditions and design parameters into the characteristic equations can obtain the characteristic parameters of bearings, which are the film thickness height, friction power, temperature, flow etc. In this paper, we planned the characteristic parameters calculation and optimal characteristic parameters calculation to obtain the changes in characteristic parameters of bearing corresponding to the design parameters.  And we compare the optimal results for the three types of oil pads in the same conditions. The tapered-land is the best, which has high film thickness height and low friction power. It can be seen that the throttle parameter ratio of the oil pad and the restrictor changes the shape and position of the curve, but does not affect the change of bearing stiffness. And when the throttle coefficient of the choke is greater than 10, there will be a large dimensionless net stiffness at the larger working load. On the other hand, if the throttle coefficient is less than 10, there will be a smaller working load large dimensionless net stiffness. The cylindrical sliders are suitable for large working loads, while thin film throttle is more suitable for small loads.

Reference ( 16 ) 〈TOP〉

[2] Malanoski, S. B. and Loeb, A. M., “The Effect of the Method Compensation on Hydrostatic Bearing Stiffness,” Transaction of the ASME, Journal of Basic Engineering, Vol. 83, No. 2, pp. 179-187, 1961.
連結：
[5] Cusano, C. “Characteristics of Externally Pressurized Journal Bearings with Membrane Type Variable Flow Restrictor as Compensating Element,” IMechE,No.188, pp.36-527, 1974.
連結：
[9] Bassani, R. “Hydrostatic systems supplied through flow dividers,” Tribology International 34 (2001) pp. 25-38.
連結：
[12] 李棋富, “閉式靜壓滑軌之特性分析與最佳化,” 中原大學機械工程學系碩士論文, 2004.
連結：
[14] Kang, Y., Lee, J.-L., Huang, H.-C., Lin, C.-Y., Lee, H.-H., and Peng, D. X.,“Design for static stiffness of hydrostatic plain bearings: constant compensations, ” Industrial Lubrication and Tribology, 2009.
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