Strength Analysis For The Gears In The Transmission System Of HXD1C Type Locomotive

In this paper,13sets of traction loads are obtained from HXD1C locomotive’s traction curve,12sets of braking loads are obtained from HXD1C locomotive’s regenerative braking curve, starting load and emergency braking load are obtained according to HXD1C locomotive design parameters. The software Pro/E is used to established the gears’precise geometry, the software HYPERMESH is used to establish the finite element model which is input to ABAQUS/EXPLICIT to calculate the transmission gears’dynamic strength and input to ABAQUS/STANDARD to calculate its static strength. For the calculations’easy convergence, establishing model I in which the gear disks are rigid coupling and model Ⅱ in which the gear rings are rigid coupling. Based ABAQUS/EXPLICIT, the model Ⅰ is used to calculate the transmission gears’dynamic meshing strength with13sets of traction loads and the emergency braking load, the model Ⅱ is used to calculate its’dynamic meshing strength with12sets of braking loads. Based Abaqus/Standard, the model I is used to calculate the the transmission gears’static strength.The results of two models under same loads are made contrast, get the reasons lead the differences in stresses and stress distributions are rigid coupling of gears disks and rigid coupling of gear rings, which lead changes of the gears’stiffness. The position of tooth maximum equivalent stress appears inconsistent with the position in the literature[61]. The results of finite element calculation and the theoretical results from the literature [62] are made contrast, the analysis shows that, the maximum deviation36.72%between the equivalent bending stress of the tooth root and the theoretical value appears in the10km/h braking load condition, the deviations in other load conditions are around15%; the maximum deviation38.41%between the contact stress and the theoretical value appears in10km/h braking load condition, the deviations in other load conditions are around15%. The law of stresses from analysis is not consistent with the literature[63]. Analyze the gear disk under all loads, the equivalent stresses are very large, exceeding the yield strength of gear material10times to30times, the reason may be due to the rigid coupling of gear ring and gear disk, then obtain a conclusion that the gear disk or gear cannot be rigid coupling when calculate the gear’s dynamic meshing strength. The explorations in this paper have a certain reference significance for the analysis of the gears’dynamic meshing strength and the dynamic finite element analysis,...