- 學位論文
考量振動及旋轉耗能之軸承設計方法
Design Method for Bearing with Considering Energy Exhaust due to Vibration and Rotation
摘要
摘要 機器不可避免振動，振動造成耗能，使軸承除了旋轉磨擦的熱散失之外，軸承溫升也必須考量振動耗能的升溫；過去罕見考量振動耗能造成的溫升，本文提出設計油膜頸軸承之設計方案其考慮軸承振動及轉動摩擦之總和溫升效應對頸軸承性能之影響，目的在探討主軸旋轉、振動和冷卻流體動力磨擦損失之總和的軸承幾何設計的選擇，因此本研究建立軸承資料庫考量振動與磨擦耗能之動壓頸軸承設計方法。 由於轉子系統在加工及安裝過程中不可避免的存在質量偏心，本文對轉子-軸承進行有限元素分析法分析其動態特性，建立一個有限元素模型，並定義各節點位置，針對主軸在不同的轉速及軸承剛度和阻尼範圍，求得軸承端之位移變化。使用Microsoft Visual Studio建立動壓頸軸承的運算服務於Windows Azure的單機試作平台中。再將振動產生的能量與摩擦功率相加之總和，與軸承散熱方式利用程式迴圈進行油溫迭代，進而得到油膜最小厚度、偏心率、最大壓力、流量及油膜溫度等特性數據。
並列摘要
Abstract Machine will inevitably produce vibrations, and vibration caused by energy consumption, in addition to the bearing rotating friction heat loss, the bearing temperature must also consider the vibration energy heating; over the past rarely considering the temperature rise caused by vibration energy, this paper proposed film journal bearing design scheme which is considered bearing vibration and rotational friction combined effects of temperature effects on the neck bearing performance, and its purpose is to investigate the bearing geometric design choices on the sum of spindle rotation, vibration and friction losses cooling fluid dynamics . Therefore, this study established a database about the considerations bearing vibration and friction energy of the hydrodynamic journal bearing design. As the rotor system during the installation process and the inevitable presence of mass eccentricity, this paper spindle bearings finite element method to analyze the dynamic characteristics of a finite element model, and define the location of each node, and then at a different speed for the spindle and bearing stiffness and damping range, calculate the displacement of the bearing end. Using Microsoft Visual Studio software to create dynamic pressure on the neck bearing computing services stand-alone test for Windows Azure platform. Then the vibration energy generated and added to the sum of the friction power, and bearing cooling mode using the program for oil loop iteration, then calculate the minimum oil film thickness, eccentricity, the maximum pressure, flow and oil film temperature and other characteristics of data.