靜壓頸軸承特性分析與最佳化

Characteristics Analysis and Optimization of Hydrostatic Journal Bearings

吳瑋仁(Wei-jen Wu)

指導教授 ： 張永鵬 ； 康淵

中原大學/工學院/機械工程研究所/碩士(2004年)

https://doi.org/10.6840/cycu200400616

摘要

本文探討毛細管節流器之靜壓頸軸承特性，並以遺傳基因演算法探討最大剛度與最小耗能為目標函數之最佳化設計。
靜壓頸軸承之性能計算，基於軸承間隙內之油膜壓力假設為線性分佈，建立其外部油壓系統經毛細管節流器流入軸承之流量與各油區間的流入及流出量之守恆方程式，聯立求解得到各油腔之壓力，進而以面積分求解軸承之承載力、剛度與耗能等靜態特性。
本文探討軸承之油腔數目、節流器參數、軸向節流面寬度比、周向節流面寬度比及偏心率等參數，對於軸承之承載力、剛度、及耗能之影響，並以此分析結果為基礎在指定的供油壓力、軸承直徑、軸承長徑比、節流器形式、軸承間隙比與轉速等條件下，採用遺傳基因演算法尋求軸向節流面寬度比、周向節流面寬度比與節流器參數等三個設計參數的最佳值，藉以得到對應已知承載力之最大剛度與最小耗能。

關鍵字

軸向節流面寬度比 ； 遺傳基因演算法 ； 靜壓頸軸承 ； 最小耗能 ； 最大剛度 ； 毛細管節流器 ； 周向節流面寬度比

並列摘要

This thesis studies the characteristics of hydrostatic journal bearings with capillary compensation. Based on the simulation results, the optimal design for bearing is carried out by using the genetic algorithm for the maximum stiffness and minimum loss. The general equations for film pressure can be derived according to the hypotheses of flow conservation along the circumferential and axial lands of bearings with infeed flow from restrictor. Furthermore, the characteristics are obtained by solving these coupled equations.
The results of the simulation including load capacity, bearing stiffness and power loss with the various numbers of recesses, restriction parameters, eccentricity ratios and the circumferential and axial land-width ratios. For restriction parameters, circumferential and axial land-width ratios optimal design are determined by using genetic algorithm under the design parameters of supplied pressure, bearing diameter, bearing aspect ratio, relative bearing clearance and rotating speed of journal. The optimal parameters corresponding to the required load capacity are obtained for the maximum bearing stiffness and minimum power loss.

並列關鍵字

minimum loss. ； axial land-width ratios ； genetic algorithm ； capillary compensation ； maximum stiffness ； hydrostatic journal bearings ； circumferential land-width ratios

參考文獻

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3. O’Donoghue JP, Rowe WB, Hydrostatic bearing design. Tribology International 1969; 2(1):25-71.

4. O’Donoghue JP, Rowe WB, Hooke CJ, Design of hydrostatic bearings using an operating parameter. Wear 1969;14(5):355-362.

5. Rowe WB, O’Donoghue JP, Cameron A, Optimization of externally pressurized bearings for minimum power and low temperature rise. Tribology 1970; 3(3):153-157.