Analysis of Influence of Eccentricity Error on Transmission Performance of Micro-segment Gears

Abstract

In order to further improve the applicability of micro-segment gears and give full play to their advantages in transmission performance, the influence of eccentricity error on the transmission performance of micro-segment gears is studied. Based on the forming principle of the micro-segment gear tooth profile, the mathematical model of the tooth profile is established. According to the characteristics of discrete profile of micro-segment gears, the meshing process of micro-segment gears is analyzed using discrete TCA (tooth surface contact analysis). The calculation method of transmission error of micro-segment gears considering eccentricity error is studied. Based on the calculation program, the influence of different eccentricity errors on transmission errors of involute and micro-segment gears is compared and analyzed. The results show that the eccentricity error will cause the transmission error of the micro-segment gears to fluctuate continuously in each meshing cycle, and the amplitude of fundamental frequency is much smaller than that of involute gears. However, as the eccentricity error increases, the influence of the high frequency part of the transmission error becomes more and more obvious. In addition, the influence of the high frequency part of the transmission error of micro-segment gears can be effectively reduced by changing the eccentricity angle. In order to design high-performance micro-segment gears, the transmission performance impact caused by eccentricity errors can be reduced by improving the machining and installation accuracy of the micro-segment gear holes and shafts.