可倾瓦滑动轴承性能计算

论文总字数：30541字

摘 要

日益增长的能源需求要求旋转机械在高转速下拥有更好的性能，因此对于轴承的要求非故障而有可能造成重大的财产损失，所以对于高速滑动轴承的深入研究也是十分必要的，而通过本次毕设可倾瓦滑动轴承的性能计算，可以通过数据的分析而避免一些事故的发生，是十分具有研究意义的。

本文利用田湾核电站1#机组真实数据，利用armd软件建立湍流模型。并对3～5块轴瓦在瓦上载荷和瓦间载荷两种载荷方式下进行性能计算。通过对模拟数据的分析比较不同转速下性能特性系数的变化，并分析原因。

本文主要结论为：瓦块数目相同，载荷方式不同时，性能特性系数存在差异。不同瓦块数，不同载荷方式，方位角始终维持在270°。随着转子转速的上升，轴承功率损耗和最小油膜厚度有所增加；供油量急速上升；出口油温、 瓦片温度均上升；功率损耗会变大，发热量增加，油温、瓦片温度上升。

本文在建模过程中没有考虑流体惯性效应，数值方面精确度还有待提高，与正式工况存在一定的差异。对于可倾瓦滑动轴承的研究还需要进一步研究探索。

关键词：可倾瓦滑动轴承、可倾瓦滑动轴承性能计算、湍流

Abstract

The increasing energy demands require rotating machinery to have better performance at high speeds, so the requirements for bearings are increasing. High-speed sliding bearings are an important category of dynamic pressure bearings. Rotating machinery often causes major property damage due to certain faults. Therefore, it is necessary to conduct in-depth research on high-speed sliding bearings. The calculation of the performance of the sliding bearing can avoid the occurrence of some accidents through the analysis of the data, which is very research-oriented.

This paper uses the real data of the 1# unit of Tianwan Nuclear Power Station and uses the ARMD software to establish the turbulence model. The performance calculation is carried out for three to five bearing bushes under two load modes: load on the tile and load on the tile. The experimental data is obtained, and the variation of the performance characteristic coefficient at different rotational speeds is compared by analyzing the simulated data, and the reason is analyzed.

The main conclusions of this paper are: the number of tiles is the same, and the performance characteristics are different when the load modes are different. The number of tiles is different, and the attitude angle is always maintained at 270°. As the rotor speed increases, the bearing power loss and the minimum oil film thickness increase; the oil supply increases rapidly; the outlet oil temperature and the tile temperature rise; the power loss will increase, the heat generation increases, the oil temperature, the tile temperature rise.

In this paper, the fluid inertia effect is not considered in the modeling process, and the numerical accuracy has yet to be improved, which is different from the formal working conditions. Further research is needed for the study of tilting plain bearings.

KEY WORDS: Tilting pad sliding bearing, tilting pad sliding bearing performance calculation, turbulence

目录

第一章 绪论 1

1.1研究背景及意义 1

1.2国内外研究概述 1

1.3轴承领域发展前景 3

1.4本章小结 5

第二章 可倾瓦轴承特性 6

2.1稳定本质 6

2.2瓦油膜静承载力 6

2.3轴承的承载力 7

2.4本章小结 7

第三章 油膜特性计算 8

3.1油膜的刚度和阻尼系数计算 8

3.2数值计算法 9

3.2.1差商表达式 9

3.2.2松弛迭代法 11

3.2.3收敛准则 11

3.2.4对称问题的处理 12

3.2.5油膜合力计算 12

3.2.6摩擦阻力的计算 13

3.2.7流量计算 13

3.3本章小结 14

第四章 油膜温度分布 15

4.1温粘关系 15

4.2能量方程 15

4.3本章小结 16

第五章 田湾核电站可倾瓦轴承性能计算 17

5.1可倾瓦轴承计算及分析 17

5.1.1田湾核电站数据整合 17

5.1.2armd软件建模过程 18

5.2田湾核电站可倾瓦轴承性能计算及分析 19

5.2.1 3瓦块瓦上载荷可倾瓦轴承性能计算 21

5.2.2 3瓦块瓦间载荷可倾瓦轴承性能分析 26

5.2.3.4瓦块瓦上载荷可倾瓦轴承性能分析 27

5.2.4 4瓦块瓦间载荷可倾瓦轴承性能分析 29

5.2.5 5瓦块瓦上载荷可倾瓦轴承性能分析 30

5.2.6 5瓦块瓦间载荷可倾瓦轴承性能分析 32

5.3本章小结 33

第六章 结论与展望 34

致 谢 35

参考文献： 36

第一章 绪论

1.1研究背景及意义

毕业设计不仅是过去四年学习情况的总结，也是一个全新的挑战，当然，整个选题工作是毕业设计的开始，也是整个设计中重要的一环。考虑到自己实际情况与知识储备情况，本次我的毕业设计课题为：可倾瓦滑动轴承的性能计算。

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