Abstract
The dynamic stability of the non-contacting mechanical seal (NMS) under variable working conditions is a vital factor for the reliable operation of rotating equipment. This paper presents a transient dynamic model to investigate the parametric response of liquid oxygen lubricated NMS under inlet pressure disturbance, which comprehensively considers asperity contact, micro-clearance lubrication and dynamic motion of a flexible mounted ring. Meanwhile, various forms of rub-impact phenomenon and dynamic instability caused by excitation overload are also analyzed. Lastly, an experimental research is proposed with diverse sensors to monitor the parameter data under pressure disturbance. In addition, the characteristics of acoustic emission signals when rub-impact of friction pair occurs are further investigated and processed, including various impact forms and location method.
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