Study on Nonlinear Vibration and Crack Fault of Rotor-bearing-seal Coupling System

Sensors & Transducers

Wanlei WANG¹  Songhe ZHANG¹  Yuegang LUO¹  Bin WU¹ 

[1] College of Electromechanical & Information Engineering, Dalian Nationalities University, Dalian, 116600, China;

关键词: Rotor system;    Oil-film force;    Seal force;    Shaft crack;    Nonlinear vibration.;   

DOI  :  

来源: DOAJ

【 摘 要 】

The nonlinear dynamic model of rotor-bearing-seal system with crack in shaft is set up based on the coupling model of nonlinear oil-film force and Muszyska’s nonlinear seal fluid force. The dynamic vibration characteristics of the rotor-bearing-seal system and the effects of physical and structural parameters of labyrinth seal and crack fault on movement character of the rotor were analyzed. The increases of seal length, seal pressure differential, seal radius and axial velocity are in favor of the stability of the system, and it of seal gap and crack depth are not in favor of the stability of the system.

【 授权许可】

Unknown