Research On The Theory Of Proifle Modification In Industrial Reducer Based On Gear Meshing Dynamics

With the rapid evolution of modern industrial technology, the geartransmission is developing toward the directions of high efficiency, high speed andheavy loads. The increasing power of gear system and the accelerating rotationalspeed, not only make the problem of vibration and noise more obvious, but alsoaffect the security and stability of the reducer. As the key technology of the designand manufacture of gear with high precision, profile modification is a veryimportant method to solve the problem of vibration and noise in gear transmission.Combined with the fundamental theory of gear dynamics, principle ofdynamical excitations, variety of mathematical models and content of dynamicalcharacteristics are roughly introduced. While the three internal excitationsincluding meshing stiffness, meshing error and meshing impact, are focused on forin-depth discussion. By joint dynamical simulation through ADAMS and ANSYS,the dynamical model of flex is set up, and the research on dynamical characteristicsof meshing force is realized. According to the principle of profile modification,finite element model contacting at the position of single tooth has been established,and maximum modifying magnitude is obtained. Aimed at four common modifyingcurve, modifying magnitude in different meshing position is calculated. Accuratemodifying model could be built by tracing points. Comparing the different resultsof dynamical simulation, the rationality of profile modification has been confirmed.Then choosing vibration characteristic of meshing force as the index of dynamicalperformance, the optimal modifying curve in this working condition can beobtained. At last, a method that can ascertain the maximum modifying magnitudeand optimal modifying curve reasonably is summarized, which will providetheoretical basis for the research and practice of profile modification.