Improving the accuracy of calculations of the drive power for a rotary excavator

1966 ◽  
Vol 2 (2) ◽  
pp. 188-193
Author(s):  
V. M. Vladimirov ◽  
V. P. Senchurov ◽  
R. S. Shmerkovich
Keyword(s):  
Rotary Excavator ◽  
Drive Power

Investigation of the effect of the constructive and mode parametres of a combined rocker on the power of the drive of the working bodies

2019 ◽  
pp. 82-85
Author(s):  
Pavel Ivanovich Pavlov ◽  
Viktor Vladislavovich Korsak ◽  
Aleksandr Olegovich Vezirov ◽  
Dmitriy Vadimovich Mukhin
Keyword(s):  
Operating Parameters ◽  
Regression Equations ◽  
Drive Power ◽  
Minimum Value ◽  
Working Bodies

The regression equations and graphical dependencies are obtained, which describe the influence of design and operating parameters on the drive power of the working bodies. The value of the design and operating parameters in which the power required to drive the working bodies, will have a minimum value  are experimentally determined.

On the power performance of a wave energy converter with a direct mechanical drive power take-off system controlled by latching

2021 ◽  
Author(s):  
Milad Shadman ◽  
Gustavo Omar Guarniz Avalos ◽  
Segen F. Estefen
Keyword(s):  
Wave Energy ◽  
Wave Energy Converter ◽  
Power Performance ◽  
Energy Converter ◽  
Drive Power

scholarly journals Determination of the Bucket Wheel Drive Power by Computer Modeling Based on Specific Energy Consumption and Cutting Geometry

Energies ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3892
Author(s):  
Ildiko Brînaș ◽  
Andrei Andraș ◽  
Sorin Mihai Radu ◽  
Florin Dumitru Popescu ◽  
Iosif Andraș ◽  
...  
Keyword(s):  
Computer Modeling ◽  
Specific Energy ◽  
Specific Energy Consumption ◽  
Open Pit ◽  
Drive Power ◽  
Improve Energy Efficiency ◽  
Cutting Geometry ◽  
Wheel Drive ◽  
Efficiency Increase ◽  
Time Required

Starting from the general principles of material cutting, with applicability to coal and overburden excavation using bucket wheel excavators (BWEs), this paper proposes another method for calculating the drive power of the bucket wheel excavator by computer modeling. This approach required two steps. In the first step, the volume of the excavated material for one slewing movement of the boom and for a particular excavation geometry was determined, and the slewing time in the open pit coal mine was measured. In the second one, the values of the specific energy (SE) consumption for cutting were determined by laboratory tests on samples of material taken from the open pit mine. The proposed method allows for the estimation of the load of the bucket wheel drive motor by taking into account only the specific energy necessary for the cutting of the material, the excavated volume during one slewing, and the time required to excavate this volume, and not the wear coefficients of the teeth or bucket edge. This method is important for establishing the correlation between the height of the excavated slice and the slewing speed of the boom in order to optimize the drive power of the bucket wheel and thus improve energy efficiency, increase the performance of excavators, and reduce operating costs.

Analytical Model for the Throughput and Drive Power Calculation in the Melting Section of Single Screw Plasticizing Units considering Wall-Slippage

2009 ◽  
Vol 24 (1) ◽  
pp. 31-40 ◽  
Author(s):  
H. Potente ◽  
M. Bornemann ◽  
M. Kurte-Jardin
Keyword(s):  
Analytical Model ◽  
Power Calculation ◽  
Drive Power ◽  
Single Screw ◽  
Wall Slippage

scholarly journals Interband Cascade Photonic Integrated Circuits on Native III-V Chip

Sensors ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 599
Author(s):  
Jerry R. Meyer ◽  
Chul Soo Kim ◽  
Mijin Kim ◽  
Chadwick L. Canedy ◽  
Charles D. Merritt ◽  
...  
Keyword(s):  
Integrated Circuits ◽  
Integrated Circuit ◽  
Detection System ◽  
Laser Cavity ◽  
Building Blocks ◽  
Drive Power ◽  
Optical Elements ◽  
Photonic Integrated Circuit ◽  
Cleaved Facets ◽  
On Chip

We describe how a midwave infrared photonic integrated circuit (PIC) that combines lasers, detectors, passive waveguides, and other optical elements may be constructed on the native GaSb substrate of an interband cascade laser (ICL) structure. The active and passive building blocks may be used, for example, to fabricate an on-chip chemical detection system with a passive sensing waveguide that evanescently couples to an ambient sample gas. A variety of highly compact architectures are described, some of which incorporate both the sensing waveguide and detector into a laser cavity defined by two high-reflectivity cleaved facets. We also describe an edge-emitting laser configuration that optimizes stability by minimizing parasitic feedback from external optical elements, and which can potentially operate with lower drive power than any mid-IR laser now available. While ICL-based PICs processed on GaSb serve to illustrate the various configurations, many of the proposed concepts apply equally to quantum-cascade-laser (QCL)-based PICs processed on InP, and PICs that integrate III-V lasers and detectors on silicon. With mature processing, it should become possible to mass-produce hundreds of individual PICs on the same chip which, when singulated, will realize chemical sensing by an extremely compact and inexpensive package.

scholarly journals Current-Transformer Based Gate-Drive Power Supply with Reinforced Isolation

2018 ◽  
Author(s):  
Jiewen Hu ◽  
Jun Wang ◽  
Rolando Burgos ◽  
Dushan Boroyevich
Keyword(s):  
Power Supply ◽  
Current Transformer ◽  
Drive Power

Optical modulators with low drive power requirements

1966 ◽  
Vol 2 (4) ◽  
pp. 129-129 ◽  
Author(s):  
R. Denton ◽  
F. Chen ◽  
K. Nassau ◽  
A. Ballman
Keyword(s):  
Optical Modulators ◽  
Drive Power

scholarly journals Non-reloading coal transportation in the eastern inclined shaft of “Raspadskaya” mine

2021 ◽  
Vol 303 ◽  
pp. 01027
Author(s):  
Vadim Yurchenko ◽  
Valeriy Nesterov
Keyword(s):  
Cross Section ◽  
Conveyor Belt ◽  
Belt Conveyor ◽  
Drive Power ◽  
Belt Drives ◽  
Belt Speed ◽  
Load Carrying ◽  
Drive Belt ◽  
Material Load ◽  
Belt Width

The planned increase in the mine output from 6.5 to 13.6 million tons per year has set the task of reconstructing a conveyor transport in the eastern inclined shaft of the Raspadskaya mine. The roadway length is 4100 m; the reduced inclination angle is +7°40´. An attempt was made to combine all the positive global practices in one project: the distribution of drive power along the length of a conveyor belt, minimizing the capital cost of implementation. Within the framework of this article, an approach to choosing the speed of a con-veyor belt is discussed, a comparative analysis of the two most com-mon types of intermediate “tripper-type” and “belt-to-belt” drives is given; calculation of a belt conveyor with intermediate “belt-to-belt” drives providing non-reloading conveying in the eastern inclined shaft. Pull force calculations showed that a conveyor belt with four interme-diate “belt-to-belt” drives can be implemented as follows: belt width – 1400 mm, belt speed – 4.0 m/s, mono-material load-carrying belt – PVG-4000, mono-material drive belt – PVG-1400, 2-pulley drive units when mounted on one side: head drive power – 2×1000 = 2000 kW, intermediate drive power – 2×1600 = 3200 kW. Thus, the use of a conveyor belt with four intermediate “belt-to-belt” drives in the in-clined shaft will give the following results: non-reloading transporta-tion over the entire length of the shaft, reducing the additional degra-dation of transported coal due to the exclusion of reloading points, minimizing costs through the use of less durable belts, minimizing costs of sinking an inclined shaft of a smaller cross-section.

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