Dynamics Modeling and Experimental Investigation of Gear Mechanism with Coupled Small Clearances

• Main Authors: Jianchao Han, Lei Liang, Huibo Zhang, Yang Zhao
• Format: Article
• Language: English
• Published: MDPI AG 2021-06-01
• Series: Entropy
• Subjects: small clearances; gear mechanism; dynamic modeling; experiment
• Online Access: https://www.mdpi.com/1099-4300/23/7/834

Internal gear mechanism is widely used in micro-nano satellites due to its compact structure and high precision transmission. However, the vibration coupling caused by the small clearance coupling is more obvious and cannot be ignored under low speed, light load and zero gravity conditions. Based on the geometric relationship between radial clearance and backlash, a coupled model between dynamic backlash and radial clearance of internal meshing gear is established. Based on the conformal contact theory, the radial collision force model of the gear shaft and shaft sleeve considering the small clearances is established. Additionally, a multi-clearance gear rotor system test device is built to measure the vibration acceleration of the internal gear rotor system by an acceleration sensor and transmitted to the industrial computer through a signal collector for data processing. Through the comparison of simulation and experiment, the accuracy of the gear dynamics model is verified. The analysis results show that, compared with the traditional model, the calculation results of the gear mechanism model considering the small clearance coupling is closer to the experimental data.