Dynamic Analysis And Optimum Design Of Transverse Axis Cutting Reducer

Developing high-performance and high-power transverse-axis roadheader is the mainstream direction of current excavation industry.As the core power transmission component of transverse-axis roadheader,the design quality of transverse-axis cutting reducer directly determines the actual cutting capacity and efficiency of the whole machine.In this paper,the cutting part reducer of a transverse-axle roadheader developed by a company is taken as the research object.With the help of ADAMS dynamics simulation,BP neural network,genetic algorithm,multiple linear regression analysis,multi-objective optimization design,ANSYS finite element analysis and other theories and technologies,the dynamic characteristic analysis and optimization design of the gear transmission system are carried out,which meets the design requirements.Under this condition,the lightweight design,working stability and reliability of the transverse axle cutting reducer are improved.The specific contents of this paper are as follows:(1)Based on the relevant manuals and design theory,the preliminary design and verification of the gear transmission system of the transverse axle cutting reducer are carried out under the given design requirements,iand the three-dimensional modeling and virtual assembly of the parts of the transverse axle cutting reducer gear transmission systerm are carried out with Solid Works three-dimensional design software to form a three-dimensional model of the gear transmission system of the transverse axle cutting reducer for subsequent analysis and verification.Optimizing provides the basic model(2)Based on ADAMS,the virtual prototype model of the gear transmission system of the transverse axle cutting reducer is established,and the system motion and dynamics simulation is carried out.The influence of the structural parameters such as the modulus of the gear transmission at all levels and the tooth width coefficient on the system dynamic characteristics is analyzed.The sensitivity analysis of the influence of the structural parameters on the system dynamic characteristics is carried out based on the multiple linear regression analysis,and the parameters are obtained.The influence degree of the system dynamic characteristics can provide reference for subsequent work such as selecting optimal design variables.(3)Based on orthogonal experimental design and dynamic simulation,the sample set of system dynamics characteristics under different combinations of gear structural parameters is constructed,and the sample set is trained by genetic algorithm and BP neural network technology.The mapping relationship between gear structural parameters and system dynamics characteristics is obtained,and a fast calculation method of system dynamics characteristics is formed to realize the system dynamics characteristic design.The decoupling of calculation and optimization design process provides a technical basis for subsequent structural optimization design of the system.(4)Aiming at the minimum volume and dynamic load coefficient of the gear transmission system of the transverse axle cutting reducer,taking the contact fatigue strength and bending fatigue strength of gears as constraints,a multi-objective optimization design model of the system is established by the unified objective method.Based on this model,the structure optimization of the gear transmission system of the transverse axle cutting reducer is carried out,and the joint simulation of ADAMS and ANSYS is carried out.Dynamic,static and modal analysis of the optimization results are carried out to verify the reliability of the optimization results.The research shows that for the gear transmission system of transverse axle cutting reducer,the change of structural parameters of all levels of gear transmission not only has a significant impact on the dynamic load of the first level gear transmission,but also on the dynamic load of the first level helical gear and the second level bevel gear transmission.However,due to the special power diversion characteristics of the planetary gear transmission,the planetary gear transmission has a significant impact on the dynamic load of the first level helical gear transmission and the second level bevel gear transmission.Wheel drive is insensitive to changes in structural parameters of gears other than this stage.Compared with the pressure angle and helix angle,the modulus and tooth width coefficient of all levels of gear transmission have more significant influence on the dynamic load characteristics of the system.The optimal design of the gear transmission system of the transverse axle cutting reducer in this paper reduces the volume of the system by 18.8%and the dynamic load coefficient by 11.5%on the premise of guaranteeing the strength requirements of the gears.The comprehensive design goal of the transverse axle cutting reducer is realized,which is lightweight,stable and reliable.In this paper,a complete technical path of dynamic characteristics analysis and structural optimization design of the transverse axle cutting reducer gear transmission system is constructed from preliminary scheme design virtual prototype model construction and simulation correlation and sensitivity analysis key mapping relationship construction system optimization design verification.Relevant research results are based on transverse axle cutting reducer.The analysis and design of the representative complex gear transmission system provides a certain theoretical and technical reference.