Ball Bearing With Gear Modeling And Simulation By Flexible Multi-body Dynamics

Geer-reducer is a typical transmission mechanism which is applied abroad in modern machinery. Rolling bearing as a key part on the rotating machinery, affects the dynamic performance of the whole mechanical system, while the gear and bearing as its main components, the character in kinematics and dynamics of transmission is related to the reliability of transmission directly. The Virtual Prototype technology are widely used in mechanical system with statics, dynamics and dynamics simulation, it has an important application value for practical engineering. Based on Virtual Prototype, people can modeling, testing, reviewing and improvement of product, while not only can save the cost of design and manufacturing and reduce the cycle of products development, but also can elevate products’performance and enhance products’competition.The subjects of this artical is the one-level reducer from the Electrical Engineering group, which bearing is the7007C from the Bearing Institute. It analyzes the performance of dynamics for gear system with Automatic Dynamic Analysis of Mechanical System (ADAMS). The dissertation is mainly categorized as follows:(1) Establishing the kinetic models for angular-ball bearing multi-body and flexible coupling multi-body respectively and obtaining the the performance of bearing dynamics under different speed conditions. The data obtained by Automatic Dynamic Analysis of Mechanical System (ADAMS) corresponds well with the theory. The models can be used as the modeling method for static and dynamic of bearing, which verifies the feasibility to process kinetic analysis of ball bearings with multi-body dynamics.(2) Multi-rigid-body model of rolling bearing established in the ADAMS, Theoretical analysis of the contact force parameter set. With the ADAMS simulation,Gear system model is obtained the related kinetics parameters, information system components, et al. Compared with the theoretical analysis of the calculation results, from the perspective of the results of comparative analysis, the establishment of the system model is verified and constraints to add more truthful and accurate. It turns out that using calculation formula and referring to the relevant constraints in this paper can more convenient and quick truly reflect the gear system dynamics performance. Due to the helical gear axial force, the axial force of a certain condition of preloaded bearing exercise more smoothly. In addition, for the purpose of this article in the simulation of gear meshing process of gear meshing force and bearing load information, it can provide certain theory basis in gear strength, fatigue design and the choice of bearing.(3) The FEA model of the gear box was established by the finite element analysis software, on the basis of multi-rigid-body system model, using the finite element analysis software and multi-body dynamics analysis software built the combination of flexible multi-body dynamics analysis model of ball bearing, after, it establish the system model simulation analysis, the simulation results can obtain the effect on dynamic performance of the input to the output shaft bearings in the process of meshing gear.(4) In this paper, the dynamic response of the ball bearing outer ring on pick up of the radial vibration frequency and vibration acceleration signals, compared with the simulation calculation results and the experimental results, verifies the ball bearing flexible multi-body contact finite element model and the accuracy of the simulation results. After the test of Dynamic response of a single bearing, gear system experiment was carried out further, picked up the bearing outer ring under the system condition of vibration acceleration signals and vibration frequency.