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Dynamic analyses for the rotor-journal bearing system of a variable speed rotary compressor / Zengli, Wang in International journal of refrigeration, Vol. 36 N° 7 (Novembre 2013) 

Public ISBD [article]  in International journal of refrigeration > Vol. 36 N° 7 (Novembre 2013) . - PP. 1938–1950 Titre : Dynamic analyses for the rotor-journal bearing system of a variable speed rotary compressor Titre original : Analyses dynamiques pour le système de palier de rotor d'un compresseur rotatif à vitesse variable Type de document : texte imprimé Auteurs : Zengli, Wang, Auteur ; Xiaoling, Yu, Auteur ; Feilong, Liu, Auteur Année de publication : 2014 Article en page(s) : PP. 1938–1950 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : Variable  speed  rotary  compressor;  Rotor-journal  bearing  system;  Dynamic  analysis;  Vibration  characteristics Résumé : In the rotary compressor, the rolling piston and the contacted rotor-journal bearing system are main moving components. They suffer very large periodically varying loads introduced by the inertia force, the contact force and the gas force. These loads change rapidly with speed variation of the compressor. They always lead to serious vibration of the system, and then result in abrasion and performance reduction. In this paper, the dynamic behavior of the rotor-journal bearing system were calculated by solving three-dimensional numerical model using finite element method, and the vibration characteristics of the system were investigated according to the calculation results. The natural frequencies and vibration modes were obtained. The stress, displacement and axis orbit of the rotor center were calculated considering the speed variation of the motor. Via the established numerical model, vibration characteristics of a newly designed compressor can be predicted, and optimization can be done to reduce the vibration. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713000686 [article] Dynamic analyses for the rotor-journal bearing system of a variable speed rotary compressor = Analyses dynamiques pour le système de palier de rotor d'un compresseur rotatif à vitesse variable [texte imprimé] / Zengli, Wang, Auteur ; Xiaoling, Yu, Auteur ; Feilong, Liu, Auteur . - 2014 . - PP. 1938–1950. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 36 N° 7 (Novembre 2013) . - PP. 1938–1950 Mots-clés : Variable  speed  rotary  compressor;  Rotor-journal  bearing  system;  Dynamic  analysis;  Vibration  characteristics Résumé : In the rotary compressor, the rolling piston and the contacted rotor-journal bearing system are main moving components. They suffer very large periodically varying loads introduced by the inertia force, the contact force and the gas force. These loads change rapidly with speed variation of the compressor. They always lead to serious vibration of the system, and then result in abrasion and performance reduction. In this paper, the dynamic behavior of the rotor-journal bearing system were calculated by solving three-dimensional numerical model using finite element method, and the vibration characteristics of the system were investigated according to the calculation results. The natural frequencies and vibration modes were obtained. The stress, displacement and axis orbit of the rotor center were calculated considering the speed variation of the motor. Via the established numerical model, vibration characteristics of a newly designed compressor can be predicted, and optimization can be done to reduce the vibration. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713000686