New Spiral Bevel Gears Planetary Drive Meshing Performance And Test

Spiral bevel gears are widely used in transportation, aerospace, marine, machine tools and other modern mechanical transmission, because of their advantages such as great contact ratio, smoothness in transmission, high carrying capacity. The planetary gear drive has been rapid developping in the field of construction machinery in recent years, for its high carrying capacity, light weight, small size, transmission ratio, etc. The planetary gear transmission is almost an irreplaceable role in the modern power machinery. By view of the above-mention, this dissertation combination of spiral bevel gears and planetary gear transmissions'characteristics, a new type of spiral bevel gear planetary transmission is firstly proposed in this dissertation, and a more in-depth theoretical study and experimental research have been done.The analyse on principle and method of spiral bevel gear planetary drive have been done by consolidated the meshing characteristics of spiral bevel gear and the driving principle of planetary gears. The calculation formulas on spiral bevel gear planetary transmission gears ratio and transmission efficiency are derived, and the corresponding analyse with the example have been done. The analyse on the meshing performance of spiral bevel gear planetary drive have been completed. By using the software of spiral bevel gear design and analysis, the analyse on the contact pattern and transmission errors and the corresponding pre-design have been carried out. The dynamic model for the spiral bevel gear planetary gears have been set up based on the gear meshing dynamics theory, and their solution are obtained by Runge-Kutta method. Refer to the traditional spur gear planetary gear structure, and according to the drive features and geometric characteristics of spiral bevel gears, the design of a spiral bevel gear planetary gear case of non-orthogonal transmission ratio of 21.5, 5mm modulus have been done. The manufacturing, installing and commissioning of the gear case have been completed. The test trials on running noise and transmission efficiency of the gear case have been achieved. The experiments prove the integrated running noise level of the gear case is below of 90dB, the transmission efficiency under the different working conditions vary greatly, an ideal situation which can reach 57.3%. The results validate the feasibility of the proposed new spiral bevel gear planetary drive in the engineering and reach the desired purpose.