The current status of heavy duty open gear drive lubrication

2002 ◽  
Author(s):  
C.D. Barrett
Keyword(s):  
Current Status ◽  
Heavy Duty ◽  
Gear Drive

scholarly journals Stresses Analysis of Roller Gear Drive

2021 ◽  
Vol 2141 (1) ◽  
pp. 012001
Author(s):  
Zih-Chun Dai
Keyword(s):  
Power Efficiency ◽  
Industrial Applications ◽  
Worm Gear ◽  
Heavy Duty ◽  
Contact Ratio ◽  
Optimization Scheme ◽  
Gear Drive ◽  
High Reduction ◽  
And Performance ◽  
Gear Drives

Abstract The roller worm gear drives have been widely adopted in numerous industrial applications such as robot joint reducer, heavy-duty production line. This study is to improve the performance of a roller gear drive by utilizing an iterative optimization scheme to improve the tooth profile of the hourglass worm gear in the roller gear drive. Dedicated design of the variable-pitch slot on the hourglass worm gear can remedy the power efficiency of the roller gear drive by enhancing the contact ratio dramatically. This research showed that the roller gear drive is a better mechanism for the high reduction ratio reducers. The CAD design and performance analysis of a roller gear drive by SolidWorks have provided the engineers an optimizing methodology.

Research on Even-Loading Mechanism of Multi-Planetary Gear Transmission

2013 ◽  
Vol 834-836 ◽  
pp. 1476-1479 ◽  
Author(s):  
Kun Li Mao
Keyword(s):  
Impact Force ◽  
Planetary Gear ◽  
Gear Transmission ◽  
Driving Mechanism ◽  
Heavy Duty ◽  
Analysis Software ◽  
Gear Drive ◽  
Loading System ◽  
Design Software ◽  
Design And Manufacture

Multi-planetary gear transmission is usually used in construction equipment, metallurgical machinery and wind-driven generator. Driving mechanism of heavy-duty equipment without even-loading system is badly loading, resulting in great impact force and severe vibration. To study characteristic of power dividing, multi-planetary gear transmission without any even-loading mechanism and that with flexible pin even-loading mechanism were simulated in commercial gear drive design software and dynamics analysis software. The simulation results are shown in this paper and conclusions are drawn useful for design and manufacture of heavy-duty multi-planetary gear transmission.

scholarly journals Accelerating to zero: speeding up the decarbonization of heavy-duty vehicles in the EU

2021 ◽  
Author(s):  
Maria Xylia ◽  
◽  
Jindan Gong ◽  
Olle Olsson ◽  
Frances X. Johnson
Keyword(s):  
Energy Efficiency ◽  
Current Status ◽  
Heavy Duty ◽  
Heavy Duty Vehicle ◽  
The Eu ◽  
Heavy Duty Vehicles

The objective of this report is to analyse the current status and outlook for decarbonization of the heavy-duty vehicle sector in the EU. The authors focus on developments over the coming 10 years, and how much the sector’s emissions could be reduced through energy efficiency improvements, electrification, and increased biofuel deployment.

Current status of special planetary and lunar theories and ephemerides

1966 ◽  
Vol 25 ◽  
pp. 266-267
Author(s):  
R. L. Duncombe
Keyword(s):  
Observational Data ◽  
Current Status ◽  
Numerical Errors

An examination of some specialized lunar and planetary ephemerides has revealed inconsistencies in the adopted planetary masses, the presence of non-gravitational terms, and some outright numerical errors. They should be considered of temporary usefulness only, subject to subsequent amendment as required for the interpretation of observational data.

Current Status of Solid-State X-Ray Systems

1985 ◽  
Vol 43 ◽  
pp. 158-161
Author(s):  
Martin Peckerar ◽  
Anastasios Tousimis
Keyword(s):  
Solid State ◽  
Electric Fields ◽  
Spectral Lines ◽  
Current Status ◽  
Mobile Charge ◽  
Electron Hole ◽  
X Ray ◽  
Sensing Systems ◽  
Transmission Electron ◽  
Electron Microscopes

Solid state x-ray sensing systems have been used for many years in conjunction with scanning and transmission electron microscopes. Such systems conveniently provide users with elemental area maps and quantitative chemical analyses of samples. Improvements on these tools are currently sought in the following areas: sensitivity at longer and shorter x-ray wavelengths and minimization of noise-broadening of spectral lines. In this paper, we review basic limitations and recent advances in each of these areas. Throughout the review, we emphasize the systems nature of the problem. That is. limitations exist not only in the sensor elements but also in the preamplifier/amplifier chain and in the interfaces between these components.Solid state x-ray sensors usually function by way of incident photons creating electron-hole pairs in semiconductor material. This radiation-produced mobile charge is swept into external circuitry by electric fields in the semiconductor bulk.

Electron-deficient boron-based catalysts for C–H bond functionalisation

2021 ◽  
Author(s):  
Yuanhong Ma ◽  
Shao-Jie Lou ◽  
Zhaomin Hou
Keyword(s):  
Review Article ◽  
Current Status ◽  
Comprehensive Overview

This review article provides a comprehensive overview to recognise the current status of electron-deficient boron-based catalysis in C–H functionalisations.

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