Abstract
Power split two-stage five-branching star gearing drive system has been widely used in the aviation engine reducer and the helicopter’s main reducer. For the problem of load sharing characteristics of this system, a static load-sharing calculation model is established. According to the power flow closed loop characteristics of the whole system, the torque equilibrium condition and deformation compatibility condition of the system are established. The load sharing coefficient of the star gears and the system is calculated by using the principle of the integrated equivalent mesh error and the static equilibrium condition of the floating element. Further, the influence of manufacturing error, installation error and floating on load sharing coefficient is analyzed. When the load sharing characteristic is independently influenced by the error, the load sharing coefficient of each star gear changes periodically with time. Basic component floating can significantly improve the load sharing performance. The correctness of the theoretical algorithm is verified by experiments. A new algorithm is proposed for engineering application.
Highlights
Power split two-stage five star gearing drive system has been widely used in the aviation engine reducer and the helicopter’s main reducer
Load sharing technology is adopted for power split star gearing transmission, which has the advantages of small size, light weight and strong bearing capacity
1) The solution of the large complex gear transmission system is simplified by the deformation coordination condition
Summary
Power split two-stage five star gearing drive system has been widely used in the aviation engine reducer and the helicopter’s main reducer. By considering the displacement coordination conditions, the load sharing characteristics of the two-stage star gear transmission system are studied by Mo et al [1], and the experimental verification is carried out. RESEARCH ON STATIC LOAD SHARING CHARACTERISTICS OF POWER SPLIT TWO-STAGE FIVE-BRANCHING STAR GEARING DRIVE SYSTEM. Li et al [19] studied the load sharing characteristics of multi-stage planetary gear train through using analytical and finite element model. Sun et al [22] established a dynamical model of two-stage helical planetary gear transmission system through using the lumped-parameter method and Lagrange general function He studied the dynamic load sharing structure of multi-stage planetary transmission system. The deformation coordination condition of the system is derived, and the calculation method of the load distribution coefficient of the two stage five-star gear transmission system is studied. Experimental verification is carried out and compared with the theoretical results
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