| As the key transmission component of the integrated intelligent integrated motor of robotic arm,aircraft and small machine tool,the planetary gear reducer must have the design requirements of small volume,high load,large transmission ratio and safety and reliability,and the NGWN planetary gear train better meets this demand,so it is widely used in such motors.The above motor needs to be stopped and started frequently during actual operation,under this high torque condition,the sudden change in torque can easily lead to the aggravation of the wear of each component,affecting the overall operating stability,safety and working life of the system,in order to effectively improve the wear and vibration and noise of each component of the planetary gear reducer under the stop and start condition,improve the transmission performance of the wheel train and extend the working life,the uniformity of load distribution between the planetary wheels plays a key role.At present,most of the research hotspots of domestic and foreign scholars are aimed at single-stage and multi-stage parallel shaft gear transmission systems and simple planetary gear transmission systems,while the research on load sharing performance and transmission performance of double planetary gear transmission systems is rarely reported,therefore,the analysis and research of load sharing performance and transmission performance optimization of NGWN planetary gear transmission has practical significance and engineering application value for improving the transmission performance and working life of integrated intelligent integrated motor.In this paper,the following research work is carried out:(1)Romax Designer(hereinafter referred to as Romax)was used to establish a rigidflex hybrid model of the reducer,and the load sharing performance of the wheel train was analyzed from the aspects of tooth surface contact state,shaft offset and meshing misalignment,and the reliability of the modeling and analysis methods was verified.(2)The torque equilibrium conditions and deformation coordination conditions of the system are established,the calculation formula of the static load sharing coefficient of the wheel train is derived based on the equivalent meshing error theory,and the optimization scheme of the load sharing performance of the wheel train is determined as the design of the floating and elastic axes of the components.(3)The transmission performance of the wheel train after load sharing optimization was analyzed from three aspects: transmission error,meshing misalignment and gear load,and the effectiveness of the load sharing optimization method was verified by comparing with the analysis results before optimization,and the gear meshing misalignment caused by shaft torsional deformation was calculated,and the uneven load caused by it was analyzed.(4)A modification method considering the torsional deformation of the double planetary gear shaft is proposed,the optimization intelligent algorithm is used to optimize the modification parameters of the double planetary gear,the double planetary gear is modified according to the solution,and the modified wheel train is simulated by Romax.The two versions of the prototype before and after the remodeling are correctly installed on the load test bench and carry out the same stop-start test.The test situation is basically consistent with the simulation results,which verifies the reliability of the proposed modeling method.After reshaping,the unit length load of the tooth surface was reduced by 57.06%and 50.65% compared with the first and second stage planetary gear before the modification,and the uniformity of the distribution of contact stress on the tooth surface was improved,the wear degree of the gear was reduced,and the working life of the gear was improved.After the modification,the error amplitude of the transmission before the modification is reduced by 77.11%,the wheel train transmission is more stable,and the load sharing performance and transmission performance are effectively improved.Figure [60] Table [8] Parameter [62]... |
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