Optimization Analysis Of A Double-Power Current Drive Axle Of A Double-Tracked Construction Vehicle

The operation conditions of double tracked construction vehicles are complex and changeable,the traditional transmission mode has low fuel efficiency,and the pollution emissions are amplified,which does not conform to the national green development concept.And electric transmission technology,with its advantages of high efficiency and energy conservation,has become the mainstream trend in the development of future construction machinery.This article conducts research on the following aspects with the aim of optimizing and improving the dual power flow drive axle of electric transmission tracked engineering vehicles:Firstly,through the research and analysis of the existing transaxle structure,starting from the structural characteristics and working characteristics of double-tracked engineering vehicles,the new electric transmission double-power flow transaxle structure is designed,and the mechanics analysis is carried out.At the same time,the main performance parameters of the electric transmission system are studied based on the power requirements of electric two-track engineering vehicles.Secondly,in order to optimize the structure of the double power flow drive axle of the electric drive axle as a breakthrough point,according to the design parameters of the motor drive axle using Solid Works software to establish a three-dimensional model of the drive axle.At the same time,Romax software is used to establish the transmission mechanism model of the drive axle,and the strength of the main tra nsmission components,such as gear,shaft and bearing,is checked,and the structural parameters are optimized to ensure that they meet the requirements of engineering vehicles.Then based on the transmission mechanism model of the transaxle,starting from the modal analysis,the vibration response analysis of the transaxle is carried out to find out the natural frequency of the transaxle easy to produce vibration noise,which is easy to avoid in the actual work.At the same time,according to the off-load condition of the gear,the gear modification optimization is used to improve the meshing condition of the tooth surface.By modifying and optimizing the gear direction and profile of the drive axle gear,the fluctuation range of transmission error between the meshing pairs of each gear in the two planetary gear sets was reduced,the maximum unit load and maximum contact temperature of the tooth surface were reduced,and the distribution of load and temperature was more uniform and reasonable.After optimization,the harmonic amplitude of the drive axle vibration is reduced by about 26.17%,which weakens the vibration noise radiated outward in the process of gear transmission,and achieves the purpose of vibration and noise reduction and optimization of the electric drive axle structure.At the same time,the driving and steering control strategies of electric two-track engineering vehicles are preliminarily studied,and the feasibility of the dynamics model is proved by vehicle dynamics simulation analysis.Finally,the test platform of electric drive dual-power flow drive bridge is built to carry on the drive bridge operation and vibration test,which further verifies the rationality of the drive bridge structure design and simulation model.