Effects on the Torque Transmission of the Transfer Case Considering the Load-bearing Capacity of Oil Film

doi:10.3901/JME.2023.15.151

Abstract

Abstract: In order for the transfer case in a short period time to undergo the full-range analysis of three stages of hydrodynamic lubrication, mixed friction and rough contact, the hydrodynamic lubrication models with steady and dynamic elastic qualities as well as the mechanical models for compressional lubrication phase are to be established. Simulation results on the variation curves of oil film thickness, speed difference, viscous torque, rough torque and total torque are obtained by using the established torque transmission models. Based on the above simulation, the test bed of the transfer case is constructed. After the test and verification of the models, the influence of the groove width, the surface roughness, engaging pressure, the number of friction plates, the material permeability and the thickness of the friction plate on the torque transmission process is studied by using the models. The results show that the groove width mainly affects the torque transmission of the transfer case through the viscous torque. The roughness ratio of different surfaces of the friction plate is in direct proportion to the time ratio of the achieved rough torque, while the engaging pressure mainly influences the torque transmission of friction plate through rough torque, and the engaging pressure of friction plate is in direct proportion to the rough torque transmitted by the friction plate in the process of operation.

Key words: automotive engineering, transfer case, oil film bearing mechanism, multi-plate clutch, experimental test

CLC Number:

TG132

WANG Yuming, LI Hongliang, CHEN Liqing, LIU Jian, LIANG Xiutian. Effects on the Torque Transmission of the Transfer Case Considering the Load-bearing Capacity of Oil Film[J]. Journal of Mechanical Engineering, 2023, 59(15): 151-161.

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