Results 101 to 110 of about 44,630 (308)

Calculation and Analysis of Meshing Efficiency of the New Internal S-gears

Jixie chuandong
In order to accurately calculate the meshing efficiency of the new internal S-gears, a time-varying friction model of the elastohydrodynamic lubrication is established considering the surface sliding of the gear tooth, lubricating oil condition and load.
Cheng Hongye, Jia Chao, Fang Zongde
doaj  

Meshing Performance Analysis of a Topologically Modified and Formed Internal Helical Gear Pair

Machines
Internal helical gear pairs are sensitive to manufacturing and assembly errors, loading deformation, which can result in vibration and noise. Three-dimensional topological modification of tooth surfaces is available to reduce this sensitivity.
Jianxin Su, Xiao Wei, Shilin Lian, Jiewei Xu   +3 more
doaj   +1 more source

A randomized controlled trial of home‐applied dual‐light photodynamic therapy during supportive periodontal care (HOPE‐CP study)

Journal of Periodontology, EarlyView.
Abstract Background Periodontitis is a common, chronic inflammatory disease that relies heavily on effective daily oral hygiene for long‐term control. Light‐based therapies have demonstrated strong antibacterial potential; however, their effectiveness in regular home use remains unexplored.
Saila Pakarinen, Hannamari Välimaa, Anna M. Heikkinen, Marja Noponen, Heikki Alapulli, Riitta K. T. Saarela, Taina Tervahartiala, Ismo T. Räisänen, Timo Sorsa, Dimitra Sakellari, Tommi Pätilä   +10 more
wiley   +1 more source

Effect of contact ratio on spur gear dynamic load [PDF]

A computer simulation is presented which shows how the gear contact ratio affects the dynamic load on a spur gear transmission. The contact ratio can be affected by the tooth addendum, the pressure angle, the tooth size (diametral pitch), and the center ...
Lin, Hsiang Hsi, Liou, Chuen-Huei, Oswald, Fred B., Townsend, Dennis P.   +3 more
core   +1 more source

Comparison of Enamel, Dentin, and the Dentin–Enamel Junction in Horse, Dog, Wild Boar, and Macaque Using Confocal Raman Microscopy

Journal of Raman Spectroscopy, EarlyView.
Confocal Raman microscopy was used to map the dentin–enamel junction (DEJ) across four mammalian species. Chemical maps highlighted variations in mineral (phosphate/carbonate) and organic (amide/CH) phase. These results provide a comparative Raman framework to link tooth microchemistry with species‐specific structure and function.
Alban Desoutter, Fredéric Cuisinier, Marc Zindel, Pierre‐Yves Collart‐Dutilleul, Richard Younes   +4 more
wiley   +1 more source

Gearing [PDF]

Gearing technology in its modern form has a history of only 100 years. However, the earliest form of gearing can probably be traced back to fourth century B.C. Greece. Current gear practice and recent advances in the technology are drawn together.
Coy, J. J., Townsend, D. P., Zaretsky, E. V.   +2 more
core   +1 more source

Polarizer mechanism for the space telescope faint object spectrograph [PDF]

, 1983
The polarizer mechanism for the Space Telescope Faint Object Spectrograph is described. This device will allow spectropolarimetric measurements of faint astronomical objects. The mechanism employs a unique arrangement to meet functional requirements in a
Thulson, M. D.
core   +1 more source

An Improved Mesh Stiffness Model for a Gear Tooth With Double Cracks on Both Sides Considering Opened and Closed States

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT Research on the failure mechanisms of gears with multiple cracks has gained widespread attention. Among these, the study of the mesh stiffness characteristics of gears with multiple cracks is crucial for optimizing gear design and improving transmission reliability.
Luyan Xu, Xin Yu, Yunyun Sun
wiley   +1 more source

Tooth Contact Analysis and Experimental Verification of Oerlikon Cycloidal Hypoid Gear

Jixie chuandong, 2015
A mathematical model is established for the whole tooth surface generation of the Oerlikon cycloidal hypoid gear,which includes the work flank and the tooth base surfaces,based on it,the tooth 3D model is obtained.
Du Jinfu, Fang Zongde, Yue Guiping, Gao Hongbiao, Zhao Guorui   +4 more
doaj  

Parameter studies of gear cooling using an automatic finites element mesh generator [PDF]

The range of accuracies achieved in the gear tooth temperature using an automatic finite element mesh generator were investigated. Gear web contribution to the gear cooling process was studied by introducing a varying size hole at the center of the gear ...
Akin, L. S., El-Bayoumy, L. E., Townsend, D. P.   +2 more
core   +1 more source