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http://dx.doi.org/10.7839/ksfc.2017.14.1.001

The Critical Speed Analysis of the Differential Planetary Gear Train of a Concrete Mixer Truck Mixer Reducer  

Bae, Myung Ho (Dept. of Aviation Maintenance, Changwon Moonsung University)
Bae, Tae Yeol (Dept. of Mechatronics, Changwon Moonsung University)
Kim, Dang Ju (DAIHO HYDRAULIC Co., Ltd.)
Publication Information
Journal of Drive and Control / v.14, no.1, 2017 , pp. 1-7 More about this Journal
Abstract
The power train of a concrete truck mixer reducer includes differential planetary gears to get a large reduction ratio for operating the mixer drum in a compact structure. These differential planetary gears are a very important part of the mixer reducer where strength problems are the main concern. Gear bending stress, gear compressive stress and scoring failure are the main concerns. Many failures in differential planetary gears are due to the insufficient gear strength and resonance problems caused by major excitation forces such as gear mating failure in the transmission. In the present study, where the excitation frequencies are the gear tooth passing frequencies of the mating gears, a Campbell diagram is used to calculate differential planetary gear critical speeds. Mode shapes and natural frequencies of the differential planetary gears are calculated by CATIA V5. These are used to predict gear resonance failures by comparing the working speed range with the critical speeds due to the gear transmission errors of the differential planetary gears.
Keywords
Mixer Reducer; Differential Planetary Gear; Critical Speed; Resonance; Natural Frequency; Gear Tooth Passing Frequency; Gear Transmission Error; Campbell Diagram;
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Times Cited By KSCI : 1  (Citation Analysis)
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