Elasto-plastic analysis of the rotor and wedges supercritical turbo generator

DOI

10.2991/icmit-16.2016.104How to use a DOI?

Keywords

ABAQUS; turbo generator rotor; wedges; Finite element method; Strength analysis; Elasto-plastic analysis; Stress gradient.

Abstract

Under the condition of over speed, the rotor and wedges of the supercritical 1000MW turbo generator are plastically deformed. By using the software ABAQUS for rotor and wedges strength analysis, The results showed that the strength of chamfer at the tooth root of aluminum wedges in rotor, chamfer at the end of aluminum wedge shoulder and chamfer at the sub-groove of anti-magnet part in rotor does not satisfy the requirements of the position. The actual stress distribution, plastic deformation region and maximum plastic strain of the rotor and the wedges can be obtained through elasto-plastic analysis of the rotor and the wedges. Establish several wedges and rotor finite element models with different parameters to those dangerous points that do not meet the strength requirements respectively, from which we can find the effect of each parameter on the stress of the dangerous point by comparison analysis. Different stress gradients of aluminum wedges in rotors result in a larger maximum stress value and a smaller plastic deformation region. The maximum stress value of the rotor decreased with the increase the chamfer radius. The average pressure at wedge shoulder is not related to the wedge angle. The maximum stress value of the wedge is significantly increased with the decrease of the radius of curvature at the corner, from which we can get the best design.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Xingtian Qu
AU  - Yongbing Zhao
AU  - Jianbing Cheng
AU  - Shengyu Wu
AU  - Chaopeng Zhang
PY  - 2016/04
DA  - 2016/04
TI  - Elasto-plastic analysis of the rotor and wedges supercritical turbo generator
BT  - Proceedings of the 2016 3rd International Conference on Mechatronics and Information Technology
PB  - Atlantis Press
SP  - 573
EP  - 578
SN  - 2352-538X
UR  - https://doi.org/10.2991/icmit-16.2016.104
DO  - 10.2991/icmit-16.2016.104
ID  - Qu2016/04
ER  -