液靜壓錐形軸承之設計分析

Design and Analysis on Conical Hydrostatic Bearings

徐嘉駿(Jia-Jyun Hsu)

指導教授 ： ARRAY(0xc8c3744)

中原大學/工學院/機械工程研究所/碩士(2009年)

https://doi.org/10.6840/CYCU.2009.00894

摘要

本文探討液靜壓錐形軸承使用毛細管節流器及單向薄膜節流器，改變油腔數目、偏心率、節流器節流參數、薄膜變形係數、長徑比、周向節流面寬度比、軸向節流面寬度比、半錐角等各種設計參數時，對軸承承載能力及靜剛度之影響。
　　本文假設主軸靜止，即轉速為零的情況下，以流阻網路法建立各油腔之流量平衡方程式，聯立求解得到各油腔壓力後，經向量計算求得軸承之徑向、軸向承載及靜剛度。
　　分析結果顯示，欲提升徑向承載與靜剛度，可增加長徑比、減小軸向節流面寬度比等設計；欲提升軸向承載與靜剛度，可增加長徑比、半錐角、周向節流面寬度比以及減小軸向節流面寬度比，在相同的軸承設計條件下，選用單向薄膜節流器比使用毛細管節流，能得到較好的軸承性能。

關鍵字

靜剛度 ； 承載力 ； 單向薄膜節流 ； 毛細管節流 ； 液靜壓錐形軸承

並列摘要

In this thesis, the design parameters for the conical hydrostatic bearing using capillary restriction and single action membrane restrictors. The parameters include the number of the recess, eccentricity, restriction coefficient of capillary, restriction coefficient of membrane, membrane compliance length-diameter ratio, half of cone-angle, circumferential land width ratio, and axial land width ratio.
　　Assume that the spindle is static. The flow resistance network method is used to establish the flow continuity equations for all recesses. Solving these equations gets the pressure of recesses and obtains the circumferential load capability, axial load capillary and static stiffness.
The analysis result showed that increasing the membrane compliance length-diameter ratio and reducing the axial land width ratio may promote the radial load and the static stiffness. Furthermore, increasing the length-diameter ratio, the half of cone-angle and the circumferential land width ratio as well as reduces the axial width ratio can promote the axial load and the static stiffness. Under the same design parameters, the single action membrane restrictors hold the better performance.

並列關鍵字

conical hydrostatic bearing ； capillary restriction ； single action membrane restriction ； load capability ； static stiffness.

參考文獻

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