Experimental Investigation on Rotordynamic Characteristics and Rotor System Stability of a Novel Negative Dislocated Seal
Joint Authors
Fei, Cheng-Wei
Sun, Dan
Wang, Xudong
Zhao, Huan
Zhang, Guochen
Tang, Wenzhong
Source
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-06-17
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
Air-induced force generated in seals is one key factor on the stability of the rotor system.
In this paper, a novel negative dislocated seal (NDS) was developed in respect of dislocated bearing theory, to reduce hydrodynamic pressure effect and air-induced force and improve rotor stability as well.
A test rig was built to test rotordynamic characteristics and rotor stability of the NDS.
The rotordynamic characteristics of seals were investigated based on the unbalanced synchronous excitation method, and seal-rotor system stability was evaluated by the identification method with an electromagnetic bearing exciter.
The effects of both rotating speed and inlet/outlet pressure ratio on the rotordynamic characteristics and rotor stability of both NDS and conventional cylindrical labyrinth seal were experimentally investigated.
The results show that with the increasing rotating speed, inlet/outlet pressure ratio is promising to reduce the direct stiffness coefficients of seals and the logarithmic decrement rate of seal-rotor system and enhance both cross stiffness and damping coefficient as well.
Besides, the developed NDS effectively reduces cross-stiffness coefficients and increases direct damping coefficients and the logarithmic decrement rate of the seal-rotor system, relative to the conventional cylindrical seal.
The proposed seal can effectively improve seal stability of turbomachinery.
American Psychological Association (APA)
Sun, Dan& Wang, Xudong& Fei, Cheng-Wei& Zhao, Huan& Zhang, Guochen& Tang, Wenzhong. 2019. Experimental Investigation on Rotordynamic Characteristics and Rotor System Stability of a Novel Negative Dislocated Seal. Shock and Vibration،Vol. 2019, no. 2019, pp.1-11.
https://search.emarefa.net/detail/BIM-1210971
Modern Language Association (MLA)
Sun, Dan…[et al.]. Experimental Investigation on Rotordynamic Characteristics and Rotor System Stability of a Novel Negative Dislocated Seal. Shock and Vibration No. 2019 (2019), pp.1-11.
https://search.emarefa.net/detail/BIM-1210971
American Medical Association (AMA)
Sun, Dan& Wang, Xudong& Fei, Cheng-Wei& Zhao, Huan& Zhang, Guochen& Tang, Wenzhong. Experimental Investigation on Rotordynamic Characteristics and Rotor System Stability of a Novel Negative Dislocated Seal. Shock and Vibration. 2019. Vol. 2019, no. 2019, pp.1-11.
https://search.emarefa.net/detail/BIM-1210971
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1210971