| Multi-stage planetary gear transmission has a very popular application in manyindustrial areas as a transmission device, which dynamic performance will seriouslyaffect the reliability and the operation life of the transmission system. There isclearance in Gear pair and the rolling bearing because of manufacturing andassembling error of compoents, which seriously affect dynamic performance of thegear system in working process. The transmission system is now facing a severchallenge from the reliability and the operation life, and it is necessary to adopt thereasonable design of the load equalizing device. Therefore, the dynamics and loadsharing characteristics of XE93pitch reducer for wind turbine are maily researched inthis paper. The following work has been completed.Multi-aim dynamical optimizing math model of pitch reducer was set up and themeshing stiffness of gear was calculated by Ishikawa method. The modal analysismethod was introduced, which is used to solve vibration equations of system. Themodal and vibration response were obtained on the basis of calculation parameters.The main error impacting load sharing condition in system was analysed.Calculation formula of load sharing coefficient was derived by establishing the staticload sharing model. The load sharing coefficient of transmission system at all levelswas calculated through the MATLAB programming when components were floating.The influence of the different floating on load sharing coefficient had been discussed.When eccentric error of component working alone, the load sharing coefficient of thefirst level transmission was obtained. In addition, The influence of the differentrotating speed on load sharing coefficient was also discussed.The original Dynamic model of system was modified. The modified dynamicmodel consider the error excitation. The vibration equations of sun gear, planetarygear and planetary carrier were established. The stiffness matrix and the dampingmatrix was derived by vibration equation of each component. The Fourier seriesmethod was introduced to solve the system equation. The dynamic load coefficientand load sharing coefficient of transmission system at all levels was calculated inMATLAB. The influence of mesh stiffness and eccentric error on load sharingcoefficient was analysed.Dynamic simulation of three-stages planetary gear reducer has been carried outbased on ADAMS. The Output speed and dynamic meshing loads in the third leveltransmission and system dynamic response of planetary gear were discussed. |
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