Analysis of the dynamic characteristics of a gear-rotor-bearing system with external excitation

Na, Risu (author), Jia, Kaifa (author), Miao, Shujing (author), Zhang, WeiGuo (author), Zhang, Quan (author)

The dynamic response of the rotor system in a ring die granulator is complex and difficult to solve when it operates under joint external, support and gear mesh forces. To solve this problem, a finite element method and extrusion theory was applied in this study to develop a dynamic coupling model for a hollow overhung rotor with external load excitation. A Newmark-β numerical integration method was used to solve for the dynamic response of the overhung rotor under multiple excitation forces. The results included time-domain response diagrams, frequency-domain response diagrams, phase diagrams, Poincaré section diagrams, and bifurcation diagrams. The model and the method were verified by testing a ring die granulator. On this basis, the dynamic response of the system is predicted according to the influence of different parameters. As the bearing support distance increased, the roller eccentricity decreased, the bearing clearance decreased, the response of the rotor system was significantly optimized, and the system tended to stabilize gradually. Therefore, this paper provides a theoretical basis and experimental verification for the optimization of a pelleting machine transmission structure.

• Language: English
• Keywords: rotor dynamics, external incentives, finite element method, bearing, gears
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2023
• Number of pages: Str. 17-31
• Numbering: Vol. 69, no. 1/2
• PID: 20.500.12556/RUL-144877
• UDC: 621.8
• ISSN on article: 0039-2480
• DOI: 10.5545/sv-jme.2022.427
• COBISS.SI-ID: 145704451
• Publication date in RUL: 20.03.2023

Record is a part of a journal

• Title: Strojniški vestnik
• Shortened title: Stroj. vestn.
• Publisher: Zveza strojnih inženirjev in tehnikov Slovenije [etc.], = Association of Mechanical Engineers and Technicians of Slovenia [etc.
• ISSN: 0039-2480
• COBISS.SI-ID: 762116

Licences

• License: CC BY-NC 4.0, Creative Commons Attribution-NonCommercial 4.0 International
• Link: http://creativecommons.org/licenses/by-nc/4.0/
• Description: A creative commons license that bans commercial use, but the users don’t have to license their derivative works on the same terms.

Secondary language

• Language: Slovenian
• Title: Analiza dinamičnih lastnosti sistema zobnik–rotor–ležaj z zunanjim vzbujanjem
• Keywords: dinamika rotorja, zunanje vzbujanje, metoda končnih elementov, ležaji, zobniki, sila pri ekstrudiranju

Projects

• Funder: Other - Other funder or multiple funders
• Funding programme: National Natural Science Foundation of China
• Project number: 52065050

• Funder: Other - Other funder or multiple funders
• Funding programme: Inner Mongolia Autonomous Region of China
• Project number: JY20220377