Results 61 to 70 of about 56,758 (188)

Optimization and Experimental Testing of the Drag Torque Model Based on the Cavitation Effect

Jixie chuandong
In the non-braking operation of the wet brake in a heavy vehicle's hybrid power transmission system, the friction pair produces a drag torque due to the power loss caused by the viscous action of the oil.
Li Jie, Lian Hailong, Lan Hai, Wang Zhiyong   +3 more
doaj  

Characterization of the Drag Force in an Air-Moderated Granular Bed

, 2009
We measure the torque acting on a rod rotated perpendicular to its axis in a granular bed, through which an upflow of gas is utilized to tune the hydrostatic loading between grains.
Brzinski III, Theodore A, Durian, Douglas J   +1 more
core  

Unzipping Dynamics of Long DNAs

, 2002
The two strands of the DNA double helix can be `unzipped' by application of 15 pN force. We analyze the dynamics of unzipping and rezipping, for the case where the molecule ends are separated and re-approached at constant velocity.
A. Sarkar, C. Bustamante, C. Levinthal, D.K. Lubensky, D.K. Lubensky, J. Liphardt, J. Santa Lucia, J.F. Marko, J.F. Marko, J.F. Marko, J.L. Viovy, John F. Marko, K.J. Breslauer, K.L. Sebastian, M. Rief, M. Wang, M. Zuker, P. Nelson, P. Thomen, R.E. Thompson, Rémi Monasson, S. Cocco, S. Cocco, S. Cocco, S.B. Smith, S.M. Bhattacharjee, Simona Cocco, T. Strick, U. Bockelmann, U. Bockelmann, U. Bockelmann, U. Bockelmann, U. Gerland   +32 more
core   +1 more source

Modeling of the Dynamics of Conical Separate Plates in a Wet Multi-Disc Clutch

Lubricants
Wet multi-disc clutches in transmission systems suffer from the incomplete separation of the friction components, which raises the drag torque and results in power loss and heightened fuel consumption.
Qin Zhao, Biao Ma, Cenbo Xiong, Liang Yu, Bing Fu, Shufa Yan   +5 more
doaj   +1 more source

Signal and power roll ring testing update [PDF]

The development of the roll ring as a long-life, low-torque alternative to the slip ring is discussed. A roll ring consists of one or more circular flexures captured by their own spring force in the annular space between two concentric conductors or ...
Smith, Dennis W.
core   +1 more source

Drag Reduction Control for Torsion and Oscillation in Top Drive System Slide Drilling

Shiyou jixie, 2018
The domestic technology of drag reduction control for torsion and oscillation in top drive system (TDS) slide drilling is not yet mature. The torque limit and torsion angle during drilling are still set by experience, which is inconsistent with the ...
Li Qian, Ji Guodong, Zhang Hui, Ge Yunhua, Wang Bo, Cui Meng   +5 more
doaj  

Development of Thrust, Torque, and Power Estimation Model, and Prediction Performance of Earth Pressure Balance Tunnel Boring Machine in Mixed-Face Strata

Applied Sciences
In this paper, a theoretical estimation model of TBM thrust, torque, and power in the rock–soil interface (RSI) of mixed ground is developed, including a new force model for the drag cutter that accounts for chamber pressure and soil friction.
Shufang Zhai, Yingjie Song, Hao Tian
doaj   +1 more source

Experimental investigation of drag loss and plate separation behavior of wet clutches under external forces

Results in Engineering
Understanding the drag loss behavior of wet clutches is crucial for the development of low-loss clutch systems. For non-horizontal installation positions and non-stationary applications, external forces caused by the inclination or vehicle dynamics act ...
Lukas Pointner-Gabriel, Simon Flamm, Max Menzel, Katharina Voelkel, Karsten Stahl   +4 more
doaj   +1 more source

Development of High Efficiency Dog Clutch with One-Way Mechanism for Stepped Automatic Transmissions

International Journal of Automotive Engineering, 2019
In order to reduce drag losses and a clutch actuator load, the new dog clutch system for stepped automatic transmission is developed. Transmitting torque is converted to the engaging force because rotating shaft and dog clutch are connected with the ...
Isamu Shiotsu, Hirofumi Tani, Masanobu Kimura, Yu Nozawa, Atsushi Honda, Motoki Tabuchi, Hirotsugu Yoshino, Kentaroh Kanzaki   +7 more
doaj   +1 more source

Optimization Design of Low Drag Torque Parameters of High-speed Wet Clutches

Jixie chuandong
In order to reduce the drag torque under high speed conditions, the equivalent radius is introduced into the traditional low speed torque model of a wet clutch with track vehicle, and the calculation model of the drag torque with radial groove is derived.
Wang Yuxi, Zhao Junsheng, Li Xueming, Gao Weidong, Gong Ke   +4 more
doaj