Results 101 to 110 of about 3,531 (255)

渐开线斜齿圆柱齿轮齿面接触强度分析

open access: yesJixie chuandong, 2014
The total contact line length isn’t a constant value during a meshing period of helical gear pair. However the length will have an affect on the linear load which acts on helical gear pair,so the variational law of contact line length during a meshing ...
李宁, 李威
doaj  

Analysis on the Machining Twisting mechanism of Tooth Surface with Axial Modification of Helical Gear and Its Influence on Meshing Performance

open access: yesJixie chuandong, 2020
The formation mechanism of tooth surface twist in helical gear generating machining (worm grinding and hobbing) and the measure to reduce the tooth surface twist are mainly studied.
Shihao Gao   +3 more
doaj  

DNA‐Enzyme Hybrid Nanostructures: Functional Materials to Modulate Enzymatic Activity

open access: yesSmall, EarlyView.
DNA–enzyme hybrid nanostructures enable precise spatial and stoichiometric control over enzyme organization, offering a powerful platform to modulate catalytic activity. This review critically evaluates key mechanistic hypotheses, including proximity effects, microenvironment changes, confinement, and stabilization, as well as highlighting ...
Manar Elnaggar, Amelie Heuer‐Jungemann
wiley   +1 more source

Effect of Gear Backlash Function on the Dynamics Characteristic of Helical Gear

open access: yesJixie chuandong, 2015
A three- degree- of- freedom shaft- torsion coupling nonlinear dynamics model of a single-stage helical cylindrical gear transmission system is established,which included the nonlinear factors such as gear backlash,time- varying stiffness,transmission ...
Wang Xin, Kang Boqiang
doaj  

Model‐Based Systems Engineering in Space Applications: A Comprehensive Literature Review

open access: yesSystems Engineering, EarlyView.
ABSTRACT The growing complexity of space engineering is driving the demand to embrace the adoption of Model‐Based Systems Engineering (MBSE). Although the MBSE is well‐practiced in the space industry, the level of effort and need required to obtain the benefits of MBSE vastly differ across enterprises; this disparity presents a significant challenge to
Rehobot Bekele Buruso   +4 more
wiley   +1 more source

Transmission errors in precision worm gear drives

open access: yes
Transmission error is a measure of the positioning accuracy of a gear system. This has been widely documented in gearing for many years as the source of problems in noise and vibration.
Fish, Michael Anderson
core  

Geometric Modelling for Cylindrical and Helical Gear Pumps with Circular Arc Teeth

open access: yes, 2014
[[abstract]]This paper describes a simple approach based on the envelope theory for deriving the geometric models of cylindrical and helical gear pumps with circular arc teeth.
Chen, C. K. ; Yang, Shyue-Cheng
core  

Study on Helical Involute Face Gear [PDF]

open access: yes, 1972
Involute face gears are usually employed for connecting the intersecting shafts or the skew shafts. This gear set is made of an involute spur pinion or helical involute pinion meshing with a face gear that is generated by a pinion cutter of the same size
両角, 宗晴
core  

Study on Internal Helical Gear Topographic Modification and Transmission Error Simulation

open access: yesJixie chuandong, 2019
In order to improve the meshing performance of the internal helical gear transmission pair, a topographic modification method of the internal helical gear is proposed.
Xiaozhong Ren, Zhifang Li, Jianxin Su
doaj  

Mobile electromagnetic levitator for time‐resolved in situ X‐ray diffraction studies of high‐temperature phase transformations

open access: yesJournal of Synchrotron Radiation, EarlyView.
A mobile electromagnetic levitator combined with time‐resolved synchrotron X‐ray diffraction enables in situ studies of high‐temperature phase transformations without container‐induced contamination and reveals the first direct observation of metastable phase formation in undercooled Fe–Co alloys.In situ observations of high‐temperature transformations,
Olga Shuleshova   +6 more
wiley   +1 more source

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