New Designs of Sectional Screw Working Bodies

2018 ◽  
pp. 104-109
Author(s):  
T. D. Navrotska ◽  
M. D. Sipravska
Keyword(s):  
High Energy ◽  
Operational Reliability ◽  
Screw Conveyor ◽  
Design Parameters ◽  
Technological Capabilities ◽  
Performance Requirements ◽  
Operational Characteristics ◽  
Flexible Working ◽  
Working Bodies ◽  
The Individual

Screw mechanisms are widely spread in all areas of national economy of Ukraine. The creation of new designs of flexible screw working bodies is an up-to-date issue. The research considers the development of new designs of sectional screw conveyor flexible working bodies (section double connection of screw spirals and a section of flexible screw conveyor) and the raising their functional and operational characteristics, made with the individual sections, because the existing flexible screw working bodies may not fully meet performance requirements because of their high material consumption, high energy expenses and other requirements. It has been proved that the choice of screw working bodies’ design will depend, first of all, on the characteristics of the process and the load on the screw. Therefore, to ensure the design of producing joints equal in spirals, we can limit the number of design choices and offer a number of functioning structures of sections of flexible screw conveyors for transportation of granular materials on curved roads. The analytical dependences for determination of design parameters of conveyor flexible screw sections are determined in the paper. The results of the research are protected by declaration patent No. 123628 "Screw hinge-part working body." It benefits in the expansion of technological capabilities and reducing the radius of the track. The new designs of conveyor sectional flexible screw working bodies (SGGRO) have advanced technological capabilities that provide significant increase in operational reliability and durability, reduction of the radius of transportation track curvature, reduce in energy costs and increase in productivity

Second Paper: Some Basic Considerations in the Design of Petro-Forge High Energy-Rate Forming Machines

1969 ◽  
Vol 184 (1) ◽  
pp. 1111-1118
Author(s):  
L. T. Chan ◽  
F. Bakhtar
Keyword(s):  
High Energy ◽  
Simple Expression ◽  
Performance Characteristics ◽  
Energy Output ◽  
Design Parameters ◽  
Energy Rate ◽  
High Energy Rate ◽  
And Performance ◽  
The Individual ◽  
Individual Design

This paper describes a method for the design and evaluation of the performance characteristics of combustion driven high energy-rate forming machines which have since been given the name Petro-Forge. The treatment is based on the use of a number of simplifying parameters derived from results on an earlier model. The first part of the working stroke, involving the opening of the seal, has been treated numerically and used as a basis for a simple expression giving approximately the same result. Hence, the variations of the energy output with the individual design parameters have been examined. The application of the expression to the design and performance characteristics of a Mk II machine are finally discussed in comparison with the observed results.

scholarly journals Research of hinged joint of screw sectional working body

2020 ◽  
Vol 11 (4) ◽  
pp. 81-87
Author(s):  
I. I. Chvartatskiy ◽  
◽  
Keyword(s):  
Optimal Design ◽  
Design Parameters ◽  
Basic Design ◽  
Bulk Materials ◽  
Method Of Calculation ◽  
Operational Characteristics ◽  
Angle Of Deviation ◽  
The Subject ◽  
Working Bodies ◽  
The Impact

The purpose of research is to determine the optimal design parameters of the hinged connection of the sectional screw working body, as well as to determine the impact of these parameters on the performance of this mechanism. The object of research is the processes of transportation of bulk materials along curvilinear routes by flexible articulated screw conveyors. The subject of the research is hinged-section screw working bodies and their parameters. The method of calculation of hinged connection of screw sectional working body is offered in the work. Calculations and analysis of changes in the efficiency of the hinge mechanism depending on its basic design parameters, such as the ratio of the radii of the ball and the cylindrical sleeve at the point of contact, the angle of deviation of the hinge axes, the angle of the conical surface of the hole. Graphic dependences are constructed on the basis of theoretical researches. Results: The optimal design parameters of this structure are established, and the influence of these parameters on operational characteristics is determined.

Study of potential curves by UHF type methods. CH4 molecule and its dissociation products

1986 ◽  
Vol 51 (4) ◽  
pp. 731-737
Author(s):  
Viliam Klimo ◽  
Jozef Tiňo
Keyword(s):  
Experimental Data ◽  
Quantum Chemistry ◽  
High Energy ◽  
Basis Set ◽  
Electronic Correlation ◽  
Exact Methods ◽  
Energy Parameters ◽  
Bond Functions ◽  
The Individual ◽  
Potential Curves

Geometry and energy parameters of the individual dissociation intermediate steps of CH4 molecule, parameters of the barrier to linearity and singlet-triplet separation of the CH2 molecule have been calculated by means of the UMP method in the minimum basis set augmented with the bond functions. The results agree well with experimental data except for the geometry of CH2(1A1) and relatively high energy values of CH(2II) and CH2(1A1) where the existence of two UHF solutions indicates a necessity of description of the electronic correlation by more exact methods of quantum chemistry.

scholarly journals Substantiation of technical and operational characteristics of the device to sort corn cobs

2020 ◽  
Vol 17 ◽  
pp. 00094
Author(s):  
Dmitry N. Byshov ◽  
Irina A. Petunina ◽  
Elena A. Kotelevskaya ◽  
Sergey N. Borychev ◽  
Georgy K. Rembalovich
Keyword(s):  
Mechanical Properties ◽  
Technological Parameters ◽  
Corn Cobs ◽  
Operational Characteristics ◽  
Basic Parameters ◽  
Treated Plant ◽  
Working Bodies

The paper presents a method to substantiate the technical and technological parameters of the device to sort corn cobs, which takes into account the biometric and physical-mechanical properties of the treated plant objects. The method of basic parameters substantiation involves determining the overall dimensions of the device, the geometric and technological parameters of the working bodies, as well as the energy for operation.

Research on Parameters Matching of Ultralight Electric Aircraft Propulsion System

2013 ◽  
Vol 732-733 ◽  
pp. 1212-1215
Author(s):  
Gui Wen Kang ◽  
Yu Hu ◽  
Ya Dong Li ◽  
Wen Hui Jiang
Keyword(s):  
Electric Propulsion ◽  
High Energy ◽  
Low Noise ◽  
Electric Power System ◽  
Propulsion System ◽  
Heat Radiation ◽  
Design Parameters ◽  
Electric Propulsion System ◽  
Electric Aircraft ◽  
Parameter Matching

The propulsion system of ultralight electric aircraft is one of the general aviation technology development directions. It has the advantages such as light pollution, low noise, high energy utilization ratio, simple structure, easy maintenance, high reliability, less heat radiation, little operation cost and so on. Combined with the certain type of ultralight aircraft design parameters, the layout of aircraft electric propulsion, the principles and steps of the parameter matching of electric propulsion system were presented. The method of parameter matching and performance verification of electric propulsion system was put forward. The feasibility of the system is verified from the point of dynamic property. The study of parameter matching of electric propulsion system could not only provide basis for the integrated optimization for electric power system, but also evaluate the performance of the system simulation as reference.

THE ABSORPTION OF HIGH-ENERGY RADIATION, A MONTE CARLO STUDY: II. SPHERICAL GEOMETRY

1963 ◽  
Vol 41 (4) ◽  
pp. 651-663
Author(s):  
N. R. Steenberg
Keyword(s):  
Cross Section ◽  
Spherical Geometry ◽  
Monte Carlo Study ◽  
Nuclear Data ◽  
High Energy ◽  
Rare Gas ◽  
Nuclear Radius ◽  
Rigid Spheres ◽  
High Energy Radiation ◽  
The Individual

The absorption of radiation in a spherical obstacle composed of rigid spheres has been studied. The result is the absorption cross section of such an obstacle as a function of the free cross section and the number A of the individual spheres and of packing density. It is found that the usual rare-gas formula represents the cross section adequately. The analysis is applied to nuclear data for the absorption of 25-Bev/c protons by nuclei. It is found that for a nuclear radius R = r0A1/3 + δ, where δ is the radius of the nucleon, r0 = 1.17 fermi, δ = 1.05 fermi, and an average nucleon transparency a2 = 0.30 is consistent with the data.

“IRIS” A Computerized High Head Pump Turbine Design System

1977 ◽  
Vol 99 (3) ◽  
pp. 567-577
Author(s):  
S. Chacour ◽  
J. E. Graybill
Keyword(s):  
Mechanical Design ◽  
Design Parameters ◽  
Design System ◽  
Performance Requirements ◽  
Manufacturing Process Planning ◽  
Depth Analysis ◽  
High Head ◽  
Critical Components ◽  
Limited Input Data ◽  
Turbine Design

“IRIS” is a computerized design and structural optimization system capable of generating all the major hydraulic and mechanical design parameters of high head pump/turbines from limited input data. The program will size the unit and select the proper hydraulic passage configuration according to performance requirements and optimize the dimensions of all the major components, generate command tapes used by a numerically controlled flame cutter, estimate cost, and issue manufacturing process planning. It also generates finite element models for the “in depth” analysis of critical components.

CAD and Optimization of Helical Torsion Springs

1994 ◽  
Author(s):  
Sayed M. Metwalli ◽  
M. Alaa Radwan ◽  
Abdel Aziz M. Elmeligy
Keyword(s):  
Iterative Process ◽  
Minimum Weight ◽  
Design Parameters ◽  
Optimal Parameters ◽  
Direct Evaluation ◽  
Torsion Spring ◽  
Performance Requirements ◽  
Design Variables ◽  
Method Of Lagrange Multipliers ◽  
Torsion Springs

Abstract The convensional procedure of helical torsion spring design is an iterative process because of large number of requirements and relations that are to be attained once at a time. The design parameters are varied at random until the spring design satisfies performance requirements. A CAD of the spring for minimum weight is formulated with and without the variation of the maximum normal stress with the wire diameter. The CAD program solves by employing the method of Lagrange-Multipliers. The optimal parameters, in a closed form are obtained, normalized and plotted. These explicit relations of design variables allow direct evaluation of optimal design objective and hence, an absolute optimum could be achieved. The comparison of optimum results with those previously published, shows a pronounced achievement in the reduction of torsion spring weight.

Gender perspectives on extended working life policies

2017 ◽  
Author(s):  
Áine Ní Léime ◽  
Wendy Loretto
Keyword(s):  
Working Life ◽  
Defined Contribution ◽  
Population Policies ◽  
Flexible Working ◽  
Working Set ◽  
The Individual ◽  
Pension Age ◽  
Pension Contribution ◽  
The Uk ◽  
State Pension

This chapter documents international policy developments and provides a gender critique of retirement, employment and pension policies in Australia, Ireland, Germany, Portugal, Sweden, the UK, and the US. It assesses the degree to which the individual country's extended working life policies have adopted the agenda (increasing pension age and introducing flexible working) set out by the OECD and the EU. Policies include raising state pension age, changes in the duration of pension contribution requirements, the move from defined benefits to defined contribution pensions, policies on caring for vulnerable members of the population, policies enabling flexible working and anti-age discrimination measures. An expanded framework is used to assess the degree to which gender and other intersecting issues such as health, caring, class, type of occupation and/or membership of minority communities have (or have not) been taken into account in designing and implementing policies extending working life.

Parametric Aircraft Design Optimisation Study Using Span and Mean Chord as Main Design Drivers

2014 ◽  
Vol 1016 ◽  
pp. 365-369 ◽  
Author(s):  
Pedro Albuquerque ◽  
Pedro Gamboa ◽  
Miguel Silvestre
Keyword(s):  
Design Methodology ◽  
Aircraft Design ◽  
Design Parameters ◽  
Flight Performance ◽  
Air Cargo ◽  
Main Design ◽  
Design Specifications ◽  
Performance Requirements ◽  
Aircraft Performance

The present work describes an aircraft design methodology that uses the wingspan and its mean aerodynamic chord as main design parameters. In the implemented tool, low fidelity models have been developed for the aerodynamics, stability, propulsion, weight, balance and flight performance. A Fortran® routine that calculates the aircraft performance for the user defined mission and vehicle’s performance requirements has been developed. In order to demonstrate this methodology, the results for a case study using the design specifications of the Air Cargo Challenge 2013 are shown.

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