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http://dx.doi.org/10.7839/ksfc.2017.14.4.071

The Critical Speed Analysis of Gear Train for Hydro-Mechanical Continuously Variable Transmission  

Bae, Myung Ho (Dept. of Aviation Maintenance, Changwon Moonsung University)
Bae, Tae Yeol (Dept. of Mechatronics, Changwon Moonsung University)
Choi, Sung Kwang (R. & D. Dept., DIC)
Publication Information
Journal of Drive and Control / v.14, no.4, 2017 , pp. 71-78 More about this Journal
Abstract
The power train of hydro-mechanical continuously variable transmission (HMCVT) for 8-ton class forklift includes hydro-static units, hydraulic multi-wet disc brake & clutches and complex helical & planetary gears. The helical & planetary gears are key components of HMCVT's power train wherein strength problems are the main concerns including gear bending stress, gear compressive stress, and scoring failure. Many failures in power train gears of HMCVT are due to the insufficient gear strength and resonance problems caused by major excitation forces, such as gear transmission error of mating gear fair in the transmission. In this study, wherein excitation frequencies are the gear tooth passing frequencies of the mating gears, a Campbell diagram is used to calculate the power train gears' critical speeds. Mode shapes and natural frequencies of the power train gears are calculated by CATIA V5. These are used to predict resonance failures by comparing the actual working speed range with the critical speeds due to the gear transmission errors of HMCVT's power train gears.
Keywords
Campbell diagram; Critical Speed; Gear Tooth Passing Frequency; gear transmission error; Hydro-Mechanical Continuously Variable Transmission; Natural Frequency;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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