Research Progress in Churning Losses of Gear Transmission

doi:10.3901/JME.2020.23.001

Abstract

Abstract: Oil churning losses have a significant influence on lubricating performance, transmission stability, and energy-saving economy of transmission systems. Research on the predicting and controlling methods of gear churning losses contributes the optimal design and energy saving of the transmission system. Studies show that oil churning losses occupy more than 50% of total power losses of reducers/gearboxes under high speed condition, and that churning losses change significantly with the lubricating condition, geometrical structure, and working condition. Churning losses is complex in mechanism and involve extensive factors, therefore exploring its mechanism and mastering energy consumption characteristics is the recent research difficulties and hotspots. Lots of researches focused on the modeling and application of oil churning losses, but many of them aimed at some a special working condition and lacked universality and systematisms. Thus, it is necessary to thoroughly discuss and summarize churning losses. By combining recent research progress in theory, simulation and bench test, the churning losses are studied based on quantitative and qualitative analysis on different influence factors. Modeling methods and applications are emphasized and the methods of reducing churning losses are given in detail.

Key words: oil churning losses, gear transmission, oil pocketing losses, CFD simulation, oil churning experiment, energy saving measures

CLC Number:

TH132

WANG Bin, NING Bin, CHEN Xinbo, Lü Hongming. Research Progress in Churning Losses of Gear Transmission[J]. Journal of Mechanical Engineering, 2020, 56(23): 1-20.

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