Simulation of large thrust-bearing performance at transient states, warm and cold start-up
Simulation of large thrust-bearing performance at transient states, warm and cold start-up
复制标题
DOI：
10.1177/1350650113500483
复制
发表时间：
2014-01
期刊：
影响因子：
--
通讯作者：
P. Pajączkowski;A. Schubert;M. Wasilczuk;M. Wodtke
中科院分区：
文献类型：
--
作者：
P. Pajączkowski;A. Schubert;M. Wasilczuk;M. Wodtke
立式水轮发电机大型动压推力轴承的启动是轴承使用寿命期间最关键的情况之一。由于垫块速度低且热变形较大，流体动力负载能力较低。本文介绍了一种新的流体动压轴承仿真方法。采用有限元方法和计算流体动力学相结合的方法对轴承启动进行瞬态仿真。对抽水蓄能电站的双向轴承进行了研究。为了展示新方法的潜在优势，对热启动和冷启动过程进行了比较。本文对两种情况的轴瓦热凸度、油膜间隙等参数进行了比较。
The start-up of a large hydrodynamic thrust bearing of a vertical hydrogenerator is one of the most critical situations during the lifetime of a bearing. Hydrodynamic load capacity is low due to low speed and higher thermal deformations of the pad. A new approach to the simulation of a hydrodynamic bearing is shown in this article. A combination of finite elements method and computational fluid dynamics is used to perform the transient simulation of the bearing start-up. A bidirectional bearing of a pump-storage power plant is investigated. To show the potential advantages of the new method, a comparison of the warm and cold start procedure is presented. The thermal crowning of the bearing pad, oil film gap and other parameters of both cases are compared in this article.