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CLC number: TH13

On-line Access: 2014-01-03

Received: 2013-07-04

Revision Accepted: 2013-10-10

Crosschecked: 2013-12-20

Cited: 5

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Citations:  Bibtex RefMan EndNote GB/T7714

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Journal of Zhejiang University SCIENCE A 2014 Vol.15 No.1 P.39-52


Numerical analysis of a nonlinear double disc rotor-seal system*

Author(s):  Wen-jie Zhou1, Xue-song Wei1, Xian-zhu Wei2, Le-qin Wang1

Affiliation(s):  1. Institute of Process Equipment, Zhejiang University, Hangzhou 310027, China; more

Corresponding email(s):   zhouwenjiezwj@zju.edu.cn

Key Words:  Nonlinear, Rotor-seal system, Finite element method (FEM), Fluid excitation

Wen-jie Zhou, Xue-song Wei, Xian-zhu Wei, Le-qin Wang. Numerical analysis of a nonlinear double disc rotor-seal system[J]. Journal of Zhejiang University Science A, 2014, 15(1): 39-52.

@article{title="Numerical analysis of a nonlinear double disc rotor-seal system",
author="Wen-jie Zhou, Xue-song Wei, Xian-zhu Wei, Le-qin Wang",
journal="Journal of Zhejiang University Science A",
publisher="Zhejiang University Press & Springer",

%0 Journal Article
%T Numerical analysis of a nonlinear double disc rotor-seal system
%A Wen-jie Zhou
%A Xue-song Wei
%A Xian-zhu Wei
%A Le-qin Wang
%J Journal of Zhejiang University SCIENCE A
%V 15
%N 1
%P 39-52
%@ 1673-565X
%D 2014
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1300230

T1 - Numerical analysis of a nonlinear double disc rotor-seal system
A1 - Wen-jie Zhou
A1 - Xue-song Wei
A1 - Xian-zhu Wei
A1 - Le-qin Wang
J0 - Journal of Zhejiang University Science A
VL - 15
IS - 1
SP - 39
EP - 52
%@ 1673-565X
Y1 - 2014
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1300230

Based on the finite element method (FEM) and the Lagrange equation, a novel nonlinear model of a double disc rotor-seal system, including the coupled effects of the gravity force of the discs, Muszynska’s nonlinear seal fluid dynamic force, and the mass eccentricity of the discs, is proposed. The fourth order Runge-Kutta method is applied to solve the motion equations of the system and numerically determine the vibration response of the center of the discs. The dynamic behavior of the system is analyzed using bifurcation diagrams, time-history diagrams, axis orbit diagrams, Poincaré maps, and amplitude spectrums. With the rotor speed increasing, the system presents rich forms including periodic, multi-periodic, quasi-periodic, and chaotic motion. We also discuss the effects of the distance between the two discs, the mass of the discs, seal clearance, seal length, and seal drop pressure on the dynamic behavior of the system. The numerical results demonstrate that a symmetrical disc structure, small disc mass, proper seal clearance, long seal length and high seal drop pressure can enhance the stability of a double disc rotor-seal system. The results provide a theoretical foundation for the design of multi-stage sealing systems.


重要结论:随着转速的增大,双圆盘转子-密封系统呈现丰富的非线性运动形式,包括周期性运动、多周期运动、准周期运动以及混沌运动。在右端圆盘不平衡质量小于34 kg、密封间隙范围为0.376 mm–0.54 mm、密封长度大于0.13 m或者密封压差高于0.104 MPa的情况下均有利于提高双圆盘转子-密封系统的稳定性。


Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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