Gear tooth spalling is one of the inevitable fault modes in long-term service traction transmission system railway vehicles, which can worsen dynamic load rotating mechanical and reduce operating quality. Therefore, it necessary to study its mechanism guide diagnosis scientifically. This paper established a planar vehicle model with an analytical time-varying meshing stiffness (TVMS) spur gear....

Tele-operated Load Haul Dump (LHDs) machines are becoming a common tramming solution throughout many mines at INCO Limited in Copper Cliff, Ontario, Canada. To reach maximum productivity from multiple teleoperated LHDs, the system must achive a proper balance of LHD speed in the haulage network and haulage layout geometry. A study was inititated to determine if multiple LHDs, tramming in second...

A simplified model of gearbox lubrication flow is investigated. A metric gear with module size 4 mm, tooth number 38, tip radius 80.25 mm and width 40 mm, is partially immersed and rotated between 0–12 1/s frequencies in room temperature distilled water. Flash and laser sheet visualizations of the global flow field and the boundary layer are presented. Resolved mass flow distributions in the fl...

Abstract. In many mechatronic systems, gear transmission chains are often used to transmit motion and power between motors loads, especially for light, small but large torque output systems. Gear will inevitably bring backlash as well elasticity of shafts meshing teeth. All these nonlinear factors affect the performance Anti-backlash systems can reduce error, has be considered too. The aim this...

In order to solve the limitation of cylindrical geared linkage in trajectory realization, this paper make the non-circular gear pair and double crank hinge five-bar as closed combination, and to probe the feasibility and method of designing non-circular gear based on the given position points in five-bar linkage trajectory region. The discrete rotation angle sequences of non-circular gear pair ...

This short paper motivates and introduces the tutorial on MGS and spatial computing presented at UCNC 2012.

The resonance of the gear-rotor system will produce a large number responses that do not exceed threshold value, resulting in structural fatigue failure and transmission failure, affecting its life reliability. It is particularly critical to consider temperature rise under high-speed heavy-load conditions. Therefore, research take main drive certain type aeroengine accessory gearbox as object, ...

We reviewed medical records from select wildlife rehabilitation facilities in California to determine the prevalence of injury in California Brown Pelicans (Pelecanus occidentalis), gulls (Larus spp.), and pinniped species (Zalophus californianus, Mirounga angustirostris, and Phoca vitulina) due to fishing gear entanglement and ingestion from 2001 to 2006. Of 9,668 Brown Pelican, gull, and pinn...

Gears are an integral and necessary component in our everyday lives. Most of the work performed in plastic and metal but very few works available in combine effect of plastic and metal gears. The main problem while referring plastic gear is the bending strength and in case of metal gear is cost. Hence, the work is performed on metal plastic composite gear to get benefit of both. Here use the co...

To date, elliptical gear has been commonly used in automobile, automatic machinery, pumps, flow meters and printing presses for its particular non-uniform rotation. However, the dynamic characteristics of elliptical gears have not been clarified yet. In this study, The calculation as well as the experiment of two elliptical gears, which are a single elliptical gear and a double elliptical gear,...