极端工况双矩形腔静压推力轴承动态特性

于晓东; 袁腾飞; 李代阁; 曲航; 郑旭航

doi:10.6052/0459-1879-18-041

极端工况双矩形腔静压推力轴承动态特性

doi: 10.6052/0459-1879-18-041

哈尔滨理工大学机械动力工程学院, 哈尔滨 150080

基金项目: 国家自然科学基金资助项目(51375123)

详细信息

作者简介:
于晓东, 教授, 主要研究方向: 润滑理论与轴承研制, 数控技术. E-mail: hustyuxiaodong@163.com

通讯作者:
郑旭航

中图分类号: TH133.3;
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出版历程
- 刊出日期: 2018-07-18

DYNAMIC CHARACTERISTICS OF HYDROSTATIC THRUST BEARING WITH DOUBLE RECTANGULAR CAVITY UNDER EXTREME WORKING CONDITION

Mechanical Power & Engineering College, Harbin University of Science and Technology, Harbin 150080, China

摘要

摘要: 静压推力轴承动态特性受润滑油黏度、油膜厚度和油腔面积等因素影响, 极端工况运行过程中经常承受阶跃载荷或正弦载荷作用, 突加载荷将导致静压推力轴承动态特性改变, 表现为轴承的抗冲击能力和恢复平衡所需时间的变化. 为获得高速重载微间隙极端工况条件下双矩形腔静压推力轴承动态特性, 分别在不同油膜厚度、不同润滑油黏度以及不同油腔尺寸条件下对双矩形腔静压推力轴承的动态性能进行理论分析, 探讨了阶跃载荷作用下润滑油黏度、油膜厚度和油腔面积对轴承动态性能的影响, 揭示了油膜动态变化规律, 探究了正弦载荷作用下双矩形腔静压推力轴承的稳定性. 结果表明: 润滑油黏度、油膜厚度和油腔尺寸变化对其动态性能有很大的影响. 润滑油黏度越大、油膜厚度越小、油腔面积越大突加载荷作用下润滑油膜抵抗冲击的能力越强, 旋转工作台受到突加外力作用下恢复至平衡状态所用时间越短. 双矩形腔静压推力轴承油膜具有较大的阻尼系数, 轴承具有极强的抵抗正弦加载作用的能力
- 极端工况 /
- 双矩形腔静压推力轴承 /
- 动态特性 /
- 阶跃载荷 /
- 正弦载荷
Abstract: The dynamic characteristics of hydrostatic thrust bearings are influenced by the lubricating oil viscosity, oil film thickness, oil cavity area and other factors, and hydrostatic thrust bearing often withstands step load or sinusoidal load under extreme working conditions, and the sudden load will lead to change of dynamic characteristics, that is, the impact resistance of the bearing and the time required to restore the balance. In order to characterize the dynamics of the hydrostatic thrust bearing with double rectangular cavity under extreme working condition of high-speed heavy micro-gap, its dynamic characteristics were theoretically analyzed under different oil film thickness, lubricating oil viscosity, and oil cavity sizes. The influences of lubricating oil viscosity, oil film thickness and oil cavity area on the dynamic performance of the bearing under step load were also investigated. In further exploring the stability of the bearing under sinusoidal load, details on the dynamic changes of the oil film were revealed. Using the lubrication theory, mechanical control principles, and a theoretical research methodology, the influences of major oil film and design parameters on the dynamic performance of the bearing were derived, i.e. the influences of the viscosity of the lubricating oil, oil film thickness, and oil cavity size. The results show that the changes of the oil viscosity, oil film thickness, and oil cavity size have significant effects on the dynamic performance of the hydrostatic thrust bearing. The viscosity of the lubricating oil, the thickness of the oil film, and the area of the oil cavity are all positively correlated with the capability of the lubricating film to resist impact loading and the capability of the rotating table to maintain its equilibrium or recover its balance in a shorter time under high dynamic external loads. It is found that the oil film of the hydrostatic thrust bearing with double rectangular cavity has a larger damping coefficient with a high capability to resist sinusoidal loading.
- extreme working condition /
- hydrostatic thrust bearing with double rectangular cavity /
- dynamic characteristics /
- step load /
- sinusoidal load

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