نتایج جستجو برای: gear teeth
تعداد نتایج: 49813 فیلتر نتایج به سال:
the treatment of in completely formed pulpless teeth has presented considrable problems. these teeth have wide open apexes and the walls of the root canal diverge toward the apical tissues. mechanical preparation cannot be done in the normal manner beacause of the large initial size and the taper of apical part of the canal , a mechanical stop cannot be produced at the apex of the canal and , t...
Bearings and other revolute pairs in gear drives will form clearances due to wear after working for a long time, which aggravate the vibration noise of gear. Therefore, taking with pair clearance as research object, calculation formulas backlash contact ratio is derived, time-varying mesh stiffness model considering presented this work. Then, nonlinear dynamic proposed by combining backlash, st...
Abstract Modal property is the crucial factor that can influence vibration characteristics of planetary gear system. Previous studies used time invariant mesh stiffness (TIMS) to study natural characteristics. However, with rotation gear, meshing will change periodically which lead changes modal properties. Based on these properties are ignored in previous studies, a translational-torsional fre...
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