As an important basic component, helical gear transmission has the advantages of stable transmission and high bearing capacity, and is widely used in coal mining machinery, aerospace, rail transit, and other fields. Helical gear transmission systems mainly rely on meshing tooth surfaces to transmit motion and power. Due to poor lubrication, overload operation of helical gears, and tooth surface defects, tooth surface wear has become a common form of failure in helical gear transmission systems. Slight tooth surface wear can have an impact on the geometric morphology and load distribution of the tooth surface, resulting in large transmission errors and reducing the transmission accuracy of helical gear transmission systems. Large tooth surface wear can cause significant vibration, noise, and temperature rise, leading to pitting, peeling, and even tooth breakage on the tooth surface of the gear, reducing the efficiency of helical gear transmission, and seriously affecting the service life of helical gear transmission. Therefore, the study of tooth surface wear of helical gears is of great significance for improving the transmission performance of helical gears, increasing load carrying capacity, and reducing vibration and noise.
Due to the time-varying characteristics of helical gear transmission and the complexity of numerical calculations, there are relatively few studies on its tooth surface wear characteristics. Taking the involute helical gear transmission as the research object, based on its transmission meshing characteristics, it is equivalent to a pair of reverse tapered roller contacts. Based on the classical Archard wear calculation formula, a calculation model for adhesive wear on the tooth surface of the helical gear transmission under dry friction is established, and the cumulative wear depth distribution law on the tooth surfaces of the driving and driven gears under a given working condition is studied, The effects of different tooth shape parameters and operating conditions on the depth and distribution of tooth surface wear were discussed.
(1) In a helical gear transmission system, the cumulative wear depth distribution of the tooth surfaces of the driving and driven gears is almost consistent. The cumulative wear depth of the tooth surfaces at the meshing positions of the tooth root and the tooth top is greater than that near the nodes, and the maximum wear depth occurs at the meshing positions of the tooth root, but the wear depth of the tooth surface of the driving gear is higher than that of the driven gear;
(2) Changes in input torque, tooth width, and number of wear cycles can have a significant impact on the amount of wear on the tooth surface of helical gears. The cumulative wear depth of the tooth surface increases with the increase in input torque and number of wear cycles, and decreases with the increase in tooth width; The influence of the spiral angle change on the cumulative wear depth of the tooth surface is not significant.