High-Speed Helical Gear Design Parameters Effect on the Dynamic Stress

Abstract

Helical gears, due to their increased contact region during the engagement cycle and consequent reduction in noise, have become ubiquitous in mechanical engineering applications and thus form the focal point of this study. This research paper meticulously examines the position of the helix angle and comprehensively evaluates its influence on the reaction force and its evolution on the gear shaft. The results reveal an optimal helix angle of 30 degrees, which minimizes the stress impact on the shaft. In contrast to the typical 40-degree angle, a reduced helix angle of approximately 5 degrees results in the largest displacement along the x-axis for gear 3 at a rotational speed of 590 rad/s, reaching up to 0.15 micrometers. Furthermore, the lowest percentage error can be observed at the 5-degree angle, with a maximum value of 0.8 degrees. A maximum reaction force of 1080 N is observed at a helix angle of 5 degrees, which increases further with the length of the helix. These results provide compelling evidence in favor of the 5-degree angle as opposed to significantly larger angles. The force exerted on the shaft, viewed from two distinct axes, and its temporal evolution are also meticulously examined, providing valuable insights into the dynamic stress of highspeed helical gears.

Thermodynamic Modelling for Heat Analysis and Prediction in Precision Transmission Systems: A Focus on Gear Operation

“…In the realm of precision machinery, attention is consistently directed toward the performance and efficiency of transmission systems, as underscored by a wealth of scholarly inquiry [1,2]. Gears, pivotal mechanical components within these systems, are recognized as bearing a substantial portion of the power load [3][4][5][6][7][8][9][10][11][12][13]. It has been observed that during their operation, the heat generated from interactions such as meshing, sliding, and impact with adjacent gears plays a significant role in influencing the system's stability and efficiency.…”

Vibration Signal Analysis of Complex Mechanical Systems and Early Wear Detection and Forecasting for Gears

“…With the progression of modern industrial technology, complex mechanical systems have been extensively utilized across various domains. These mechanical systems typically encompass numerous gears, bearings, and other rotating components, the operational states of which directly influence the overall system's stability and safety [1][2][3][4]. During prolonged operation, wear and aging in these components are inevitably encountered, potentially leading to system performance decline or even failures [5,6].…”