Abstract
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.
Highlights
With the rapid development of micro-satellites, the transmission mechanism as the core component has become the focus of attention
The internal gear mechanism is widely used in the field of aerospace due to its compact structure and high precision
The multi-clearance coupled model proposed in this paper considers the coupling relationship between radial clearance and dynamic lateral clearance, which can reflect the nonlinear phenomenon caused by multi-clearance coupling in the test
Summary
With the rapid development of micro-satellites, the transmission mechanism as the core component has become the focus of attention. When the radial clearance of the bearing causes the gear to run plication such asprocess, aerospace low speed, light load and gravity out in thebackgrounds, gear transmission theagencies, actual center distance between thezero gear teeth will makeand thethe coupled between clearances more obvious and In difficult changes, size ofvibration the meshing pointmultiple and the backlash changes . 2. Dynamic Model of Multi-Clearance Internal Gear Mechanism System structure and high precision transmission. In the internal meshing gear mechanism, radial run out of the gear and dynamic change of the backlash, and the torsional vibration clearances exist in the bearing, and in the tooth side, which will lead to radial at the gear place will influence the radial vibration. In order to reflect the phenomenon model of internal gear mechanism with multiple clearances is established, as shown in of vibration caused by coupling of multiple clearances, a nonlinear dynamic model of Figure 1.
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