Static and Transient Stress Analysis of an Elastic Oil Sump

Abstract:

As an important supporting component of thrust bearing of hydropower plant, the elastic oil sump plays a vital role in the safe operation of the hydropower plant. Considering the complicated working conditions of the elastic oil sump, it is of great significance and convenience to use a method of CAE to simulate the actual working state of it. In literature, many researchers have investigated static behaviors of the elastic oil sump. However, a dynamic analysis of the oil sump has been seldom investigated formally yet. Therefore, in this study we particularly focused on investigating the dynamic behaviors of a single corrugated elastic oil sump. In this study, the finite element model of the studied oil sump is built with reasonable simplifications of the working status. Then, static and dynamic analyses of a single corrugated elastic oil sump are performed by the means of ANSYS software. Performance parameters of the sump, the initial oil pressure and dangerous region are determined through the static analysis. In the dynamic analysis, the time-history curves of VM equivalent stress and 1st /2nd/3rd principal stress of a tracked node in the crucial region are obtained. The results showed that the method of finite element analysis (FEA) suits well in the study of the stiffness properties of the elastic oil sump and the stress cycle is big enough to induce fatigue damage to which should be paid close attention.

• Periodical: Applied Mechanics and Materials (Volumes 157-158)
• Pages: 810-817
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.157-158.810
• Online since: February 2012
• Authors: Shuai Wang, Zong De Liu, Bin Li, Peng Duan
• Keywords: ANSYS Software, Dynamic Stress Analysis, Single-Corrugated Elastic Oil Sump, Static Stress Analysis, Transient Stress Analysis

References

[1] ANSYS Structural Analysis Guide, ANSYS SAS IP Inc., (2004).

[2] ANSYS 12. 0 Training Manual, ANSYS SAS IP Inc., (2009).

[3] Li Na: Calculating Method of Finite Element for the Single-corrugated Elastic Sump of Large Hydro-generating Unit, Heilongjiang Science and Technology of Water Conservancy, Harbin (2010).

[4] Ding Shuhua and Pang Lijun: Study of a Calculation Method for the Strength Properties of Single-corrugated Elastic Sump of hydro generator, Shanghai Medium and Large Electrical Machines, Shanghai (2010).

[5] Fu Jianping: Repairing of Leaky Elastic Oil Tanks for a 125MW Hydropower Unit in Gezhouba Hydropower Station, Central China Electric Power, Wuhan (1999).

[6] Wei Wei: Case study of Leaky Elastic Oil Tanks in Thrust Bearing, Small Hydro Power, Hangzhou (2009).

[7] Nand Kishor, R.P. Saini and S.P. Singh: A Review on Hydropower Plant Models and Control, Renewable and Sustainable Energy Reviews, Vol. 11(2007), pp.776-796.

DOI: 10.1016/j.rser.2005.06.003

[8] Hailun Huang and Zheng Yan: Present Situation and Future Prospect of Hydropower in China, Renewable and Sustainable Energy Reviews, Vol. 13 (2009), pp.1652-1656.

DOI: 10.1016/j.rser.2008.08.013