منابع مشابه
Analytical Crack Propagation Scenario for Gear Teeth and Time-Varying Gear Mesh Stiffness
In this paper an analytical crack propagation scenario is proposed which assumes that a crack propagates in the tooth root in both the crack depth direction and the tooth width direction, and which is more reasonable and realistic for non-uniform load distribution cases than the other presented scenarios. An analytical approach is used for quantifying the loss of time-varying gear mesh stiffnes...
متن کاملNonlinear Contact Analysis of Gear Teeth for Malfunction Diagnostics
Gearboxes sustain a variety of faults such as broken-shafts, eroded, broken, or missing teeth, and even broken-cases. Casing mounted accelerometers can detect fault patterns but the signals are complicated and difficult to interpret. This study considers the tooth loading of ideal gears and gears with defects. A large industrial gearbox used in a 12m electric mining shovel is modeled. The nonli...
متن کاملA Differential Planetary Gear Model with Backlash and Teeth Damage
Planetary gear trains can be more compact and efficient as power transmissions than fixed axis gear trains but are also more complicated and less understood in terms of vibration health monitoring. A practical differential planetary gear train, which combines two inputs and one output, is studied using multi-body dynamics software. Backlash between the sun gear and planet gears are precisely sp...
متن کاملPremature loss of deciduous teeth.
Premature exfoliation of deciduous teeth is very rare in children. It is well known that it may occur in severe pink disease (acrodynia) and in local disease of bone, such as osteitis and eosinophilic granuloma (Thoma, 1937; Stones, 1954). The teeth in the above conditions are extruded with the roots intact due to a loss of their supporting bony tissue. In hereditary ectodermal dysplasia teeth ...
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ژورنال
عنوان ژورنال: Journal of the National Science Foundation of Sri Lanka
سال: 1972
ISSN: 2362-0161,1391-4588
DOI: 10.4038/jnsfsr.v1i1.2000