Dynamic analysis of elliptical vibrating screen based on disc motor

ABSTRACT

According to the requirements of the current drilling fluid vibrating screen for high efficiency, high reliability and low energy consumption, an elliptical vibrating screen based on disk motor is proposed. The dynamic analysis model of the vibrating screen of the three-excited motor is established, and the dynamic characteristics of the whole system and key structures are studied by multi-body dynamics and finite element method. The dynamic stress response characteristics of the rigid flexible coupling system of screen box are mainly analysed. Based on the deformation and stress of the flexible body damage node analysis results, through the fatigue cumulative damage theory and rain-flow counting method against casing load surface fatigue life prediction, verifying the reliability of fatigue life of screen box. The result shows that: Three Eccentric Rotors elliptical vibrating screen can achieve balanced elliptical vibration track, meeting the requirements of high stable amplitude vibration, and its natural frequency, structural strength and fatigue life all meet the engineering requirements, verifying the feasibility and effectiveness of the design scheme.

KEYWORDS:

• Disc motor
• three eccentric rotors
• vibrating screen
• rigid-flexible coupling
• fatigue life
• dynamics

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Notes on contributors

Wang Yu Wen

Wang Yuwen received the BS degree in Mechanics from Huazhong University of Science and Technology, China, in 2010, and his MS degree in Mechanics from Southwest Petroleum University, China, in 2013. His research interests include dynamics of multi-body systems and nonlinear systems, and dynamics of synchronizing systems.

Tang Jia Hui

Tang Jiahui received the BS degree in Mechanics from Southwest Petroleum University, China, in 2019.