scholarly journals ОЦІНЮВАННЯ ГЕОМЕТРИЧНИХ ПАРАМЕТРІВ ПОЛЮСНОЇ СИСТЕМИ МАТРИЦІ ЕЛЕКТРОМАГНІТНОГО СЕПАРАТОРА

2022 ◽  
pp. 9-17
Author(s):  
IRYNA SHVEDCHYKOVA ◽  
JULIA ROMANCHENKO ◽  
INNA MELKONOVA
Keyword(s):  
Dynamic Problem ◽  
Separation Zone ◽  
Separation Process ◽  
Working Process ◽  
Working Space ◽  
Ferromagnetic Body ◽  
Calculation Results ◽  
Increase Productivity ◽  
Length Of Separation ◽  
Pole System

Purpose. The choice of the geometric dimensions ratios of system of matrix poles of electromagnetic polygradient separator to increase productivity with maintaining the reliability of extracting of ferromagnetic impurities from bulk material.Methodology. To solve the dynamic problem of motion of a ferromagnetic body in the working gap of pole system of matrix of polygradient separator under the influence of an external magnetic field the known methods of solving linear inhomogeneous differential equations are used. To confirm the reliability of obtained results the method of experimental research is used.Findings. The formulation of dynamic problem of movement of ferromagnetic body in the working gap of plate pole system of matrix of polygradient separator is carried out. Parametric equation for the trajectory of ferromagnetic body removal and a calculated relation connecting the main geometric dimensions of the system of matrix poles are obtained. The calculation results are confirmed experimentally and by operating practice of known magnetic separating devices.Originality. The mathematical description of working process of a polygradient electromagnetic separator with a plate matrix was further developed, which made it possible to obtain an analytical expression that takes into account the main geometric dimensions of the working space of matrix of separator.Practical value. Accounting of obtained analytical dependences between the length of separation zone and air gap, which characterizes the thickness of the separated material layer through which the ferromagnetic body must pass during the separation process, will ensure the necessary purity and productivity of separation.

scholarly journals ON THE ISSUE OF DETERMINING THE CRITICAL CUTTING SPEED OF THE MECHANISM FOR FORMING AND TRIMMING THE FALSE EDGE OF THE DORNIER RAPIER LOOM

2021 ◽  
Vol 53 (3) ◽  
pp. 37-40
Author(s):  
Svitlana V. Bukina ◽  
Tatiana A. Sitnikova
Keyword(s):  
Rational Design ◽  
Mutual Influence ◽  
Cutting Speed ◽  
Design Parameters ◽  
Working Process ◽  
Forming Mechanism ◽  
Rational Design Parameters ◽  
Calculation Results ◽  
Knife Blade ◽  
The Impact

In this paper, an attempt is made to develop a method for determining the critical cutting speed of the threads of the false edge of the edge-forming mechanism of the weaving rapier machine. The proposed calculation method takes into account the impact nature of the cutting process at a critical speed, which allows taking into account the mutual influence of the parameters of the working process and more fully assess the mechanics of this process, in which the intensity of the cutting force and the value of the contact stress take the maximum value. The paper calculates the critical cutting speed for some of the main types of threads used and the parameters of the knife blade. The presented calculation results can be used to select rational design parameters of the knife blade, depending on the type of processed threads, when designing and researching new edge-forming mechanisms on looms.

scholarly journals Design and Fabrication of Faulty Product Detection and Separation System

2021 ◽  
pp. 114-119
Author(s):  
Rahul Bhosale ◽  
Yusuf Suratwala ◽  
Sumit Ranjan ◽  
Rohan Thorat
Keyword(s):  
Liquid Crystal Display ◽  
Separation Process ◽  
Manufacturing Industries ◽  
Pneumatic Cylinder ◽  
Separation System ◽  
Conveyor System ◽  
Increase Product Quality ◽  
Increase Productivity ◽  
Material Separation ◽  
Product Costs

With recent advances in industrial technologies, automation has become an indispensable part in the manufacturing world. Industrial environments are adopting more and more aspects of automation to increase product quality, accuracy, and reduce product costs. Conveyor systems are used wildly in manufacturing industries. This automated conveyor system works by detecting the size of the material in the conveyor using ultrasonic sensors. The microcontroller analyses this data from the ultrasonic sensor and then directs the pneumatic cylinder material to different directions, height-wise, depending on the height of the material. The position of the conveyor is indicated by a 16X2 liquid crystal display and LED. This project thus automates the material separation process in the conveyor to improve efficiency and increase productivity.

Position and Workspace Analyses of 3-SPR and 3-RPS Parallel Manipulators

2005 ◽  
Author(s):  
Yi Lu ◽  
Yonghe Zhao
Keyword(s):  
Parallel Manipulator ◽  
Parallel Manipulators ◽  
Analytic Formula ◽  
Analytic Approach ◽  
Work Space ◽  
Working Space ◽  
Computer Aided ◽  
Calculation Results ◽  
Position And Orientation ◽  
Orientation Workspace

An analytic approach and a simulation mechanism for solving position and the workspace of a 3-SPR parallel manipulator are proposed. First, a simulation mechanism of the 3-SPR parallel manipulator and a simulation mechanism of the 3-RPS parallel manipulator are created by using the computer aided geometry constraints and dimension-driving techniques. Second, some analytic formulas are derived for inverse and forward solving position and orientation of the 3-SPR parallel manipulator. Third, some available solutions from multi-solutions during deriving analytic formula are determined, and analytic inverse and forward solutions are verified by using simulation mechanisms. Finally, the workspace of the 3-SPR parallel manipulator is created and three key parameters for determining work space of two kinds of parallel manipulators are solved. Calculation results prove that the position working space of the 3-SPR parallel manipulator is much larger than that of the 3-RPS parallel manipulator, and the orientation workspace of the 3-SPR parallel manipulator is less than that of 3-RPS parallel manipulator.

scholarly journals METHOD OF NON-GRADIENT MINIMIZATION POWELL'64 IN THE TASKS OF MONITORING OPERATION OF MARINE DIESEL ENGINES

2017 ◽  
pp. 49-61
Author(s):  
Alexey Valerievich Yeryganov ◽  
Vladyslav Olegovych Maulevych ◽  
Roman Anatolievich Varbanets ◽  
Evgeniy Ivanovich Zholtikov ◽  
Valeriy Georgievitch Ivanovskiy ◽  
...  
Keyword(s):  
Diesel Engines ◽  
High Efficiency ◽  
Gradient Methods ◽  
Data Synchronization ◽  
Working Process ◽  
Test Function ◽  
Synchronization Problem ◽  
Medium Speed ◽  
Marine Diesel ◽  
Calculation Results

The article touches upon the possibility of using the method of gradientless n-parametric minimization of Powell'64 in tasks of monitoring the working process of marine diesel engines. There is given an example of finding a global minimum of the Rosenbrock test function. Using the Powell'64 method, the Least-squares functionals in the synchronization and modelling tasks of compression-expansion curves in the working cylinder are minimized. The calculation results of data synchronization for low-speed two-stroke and medium-speed four-stroke marine diesel engines are shown. The synchronization problem can be solved in terms of equation P' = 0 derived for the sector from compression starting to combustion starting in the cylinder. The selection of the boundary conditions for simulation is shown. The advantage of Powell’64 method is its high efficiency for quadratic functionals. As opposed to gradient methods, the Powell'64 method does not require calculating derivatives and is universal for minimizing complex nonlinear general functionals. The original author's algorithm of data synchronization by analyzing the indicator diagrams using the Powell'64 method has been applied in the latest versions of monitoring systems of D4.0H marine diesel engine.

scholarly journals PERANCANGAN POROS DAN BEARING PADA MESIN PERAJANG SINGKONG

SOSCIED ◽  
2018 ◽  
Vol 1 (2) ◽  
pp. 42-48
Author(s):  
VINA N VAN HARLING ◽  
Herryanto Apasi
Keyword(s):  
Shear Stress ◽  
Service Life ◽  
Electric Motor ◽  
Rolling Bearing ◽  
Working Process ◽  
Shaft Diameter ◽  
Engine Component ◽  
Calculation Results ◽  
Machine Elements ◽  
The Moment

Cassava chopper machine is a machine that serves to help or lighten human work in the process of chopping cassava. The working process of this cassava chopper machine uses an electric motor as a drive to rotate the cassava cutter blade shaft which is connected using a pulley and belt. The shaft is a very important component in a cassava chopper machine because it functions as a successor to the power and rotation of an engine component to other machine elements. Considering that shaft functions are very important, these components must be designed and ensured to be able to work well when receiving loading and have a service life as expected. Based on the power plan data based on the calculation results obtained 0.55kW, the results of the calculation of the moment of the plan amounted to 1847 Kg.mm. Based on the calculation of the value of the shear stress obtained by 6.66 kg / mm2 while the measurement of the shaft diameter is 14.7 mm. The results of measuring the diameter of the shaft are close to the size of the shaft diameter used when making cassava chopper machines that are equal to 15 mm. After the calculation results of the shaft have been determined then to determine the bearing that will be used on the cassava chopper machine is a rolling bearing with UPC 202 type with a diameter of 15mm.

scholarly journals PENINGKATAN PRODUKTIVITAS LINE STITCHING, PADA INDUSTRI ALAS KAKI DENGAN METODE OEE (OVERALL EQUIPMENT EFFECTIVENESS) STUDI KASUS DI PT PRATAMA ABADI INDUSTRI

2017 ◽  
Vol 2 (1) ◽  
Author(s):  
Ismi Mashabai
Keyword(s):  
Production Process ◽  
First Year ◽  
Footwear Industry ◽  
World Standard ◽  
Calculation Results ◽  
Increase Productivity ◽  
Second Year

Productivity is an important point of the existence of the industry. PT Pratama Abadi Industri, which is one of Nike's footwear industry, need to increase their productivity. To achieve these objectives, this thesis using the method of Overall Equipment Effectiveness (OEE) in order to increase productivity, especially in the production process of stitching line. OEE value calculation results in line stitching for 2 years was 49.99% in the first year (SEP, 2014 s / d Agus 2015) <85.00% (world standard OEE values) and 50.81% in the second year (SEP 2015 s / d Agus 2016) <85.00% (world standard OEE values). The three variables that cause low OEE value is the loading time, the total pieces and defect.

scholarly journals Radiometric Methods of Monitoring of a Coal Separation Process in a Pulsating Jig

2016 ◽  
Vol 32 (2) ◽  
pp. 125-134
Author(s):  
Stanisław Cierpisz ◽  
Marek Kryca ◽  
Waldemar Sobierajski ◽  
Marian Gola
Keyword(s):  
Control Systems ◽  
Closed Loop ◽  
Separation Zone ◽  
Scintillation Counter ◽  
Separation Process ◽  
Measuring Head ◽  
Natural Radiation ◽  
Loop Control ◽  
Separation Density ◽  
Material Separation

Abstract A new monitoring system based on the monitoring of natural radiation emitted by the material in the separation zone of a jig compartment has been developed and tested in parallel with a radiometric density meter and a conventional float. The authors investigated the correlation between the separation density monitored by the meter and the intensity of the natural radiation. The measuring head of the radiometric density meter consists of a 137Cs radiation source and a detector in the form of a scintillation counter. The signal from the detector is measured over a period of 0.15 s at the end of each cycle of pulsations (1.2 s) when the material is compressed. The control systems were installed in the second compartment of the OM20-type jig. The aim of control was to stabilise the separation density at desired values. The separation process was monitored by a radiometric density meter (RDM) to indicate changes in the separation density over a given period of time. The RDM was installed close to the upper edge of the product overflow wall to measure the density of the material separation layer reporting in half to the product and in half to the refuse. A conventional float, indicating the position of the heavy fraction in the bed, was used as a basic sensor in the control system. After first experiments the RDM replaced the float as a main sensor in the closed loop control. In the third experiment a new monitor, based on the measurement of the natural radiation emitted by the material (NRM) accumulating below the product overflow wall was used. A good correlation between the NRM indications and the RDM measurements indicates that the radiometric density meter RDM can be replaced effectively by the NRM, especially in control systems where separation density is stabilised at desired values.

scholarly journals INCREASING OF PRODUCTIVE CAPACITY OF LANDS AT THE EXPENSE OF IMPROVEMENT OF TECHNOLOGY AND EQUIPMENT FOR DISSOLUTION OF MINERAL SUBSTANCES IN BIOLOGICAL FERTILIZERS

2019 ◽  
pp. 26-34
Author(s):  
Ivan Sevostyanov
Keyword(s):  
Equations Of Motion ◽  
Design Calculation ◽  
Productive Capacity ◽  
Working Process ◽  
Agricultural Enterprises ◽  
Urgent Task ◽  
Mineral Substances ◽  
Increase Productivity ◽  
Dissolution Efficiency ◽  
Main Operating

Solving the problem of the dissolution of mineral substances (in particular, lime) in biological fertilizers (bioreactor waste after production of biogas and biodiesel) and the use of these fertilizers in agriculture can increase the productivity of the main crops (wheat, rye, corn, oats, potato) in 2–3 times and therefore is an urgent task. The complete dissolution of lime in biological waste in a ratio of 1 to 3 in a closed container without the use of mixing or other means of intensification of the process, requires a significant expenses of time (about 3 weeks or 500 hours), does not satisfy agricultural enterprises. Under of using of heating of a mixture of lime with waste for intensification the dissolution, a lot of useful microorganisms die in it, which reduces the value of biological fertilizers based on it. Known equipment for mechanical dissolution: screw and drum mixers, vibration mixers, centrifuges - work with relatively small amounts of waste (up to 1 ton) and therefore do not provide the necessary productivity of the working process, while increasing the mass of the portion leads to a noticeable decrease in the dissolution efficiency. In the work, a scheme of a special installation for dissolving mineral substances in biological fertilizers is developed, which will provide a combined static and dynamic load of a portion of fertilizers with its additional heating, which will increase productivity and reduce the energy intensity of the work process. The equations of motion of the executive element and the dependencies to determine the main operating parameters of the installation are obtained. On the basis of their a mathematical model and design calculation method can be developed.

Dissipation Analysis of IGBT Module in FB-ZVZCS-PWM Converter

2013 ◽  
Vol 433-435 ◽  
pp. 1347-1354
Author(s):  
Xian Zheng Liu ◽  
Rui Jin ◽  
Kun Shan Yu ◽  
Li Jun Xie ◽  
Hai Long Bao ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Power Supply ◽  
Estimation Method ◽  
Working Process ◽  
Pwm Converter ◽  
Switching Converter ◽  
The Core ◽  
Igbt Module ◽  
Calculation Results ◽  
The Government

Along with the government and market take more and more attention to the energy efficiency of power supply, the loss of IGBT module, as the core device, has become a hot topic. Firstly, the dynamic process of IGBT module is analyzed, an accurate and an estimation method of loss calculate are provided, then the working process and resonant process of phase shift full-bridge soft switching converter is discussed, and constitute of IGBT module loss in the circuit is analyzed. Finally the loss is calculated in the 350A inverter welder example, and a conclusion of reliability and proposal for design are given according to the calculation results.

scholarly journals PENGGUNAAN TANGKAI PEGANGAN ROLLER CAT YANG DIMODIFIKASI MENINGKATKAN KINERJA PENGECAT PLAFON RUKAN DI DENPASAR

1970 ◽  
Vol 2 (2) ◽  
pp. 1
Author(s):  
I Gusti Agung Haryawan ◽  
I Dewa Putu Sutjana ◽  
I Made Sutajaya
Keyword(s):  
Research Result ◽  
Wilcoxon Test ◽  
Musculoskeletal Complaint ◽  
Working Process ◽  
Subjective Complaint ◽  
Field Worker ◽  
Productivity Data ◽  
Working Posture ◽  
Increase Productivity ◽  
Load Variable

Buildings development is very glowing recently.  This also has effect on manpower who works at this sector.  Manpower is demanded to have skill according to his field.  Worker at finishing field or especially for ceiling painter needs skill and technique that he should master.  While working the worker always assists by tools and paint materials.  Tools that are used by the ceiling painter have not been refered to antropometry aspect, so it can cause inconvenient in performing the job.  Working with toold that are not accorded to ergonomic principle and working posture that is not physiological can cause fatigue, muscle disturbance, musculoskeletal and increasing working load.  That is why it needs to modify painting roller holder stick.  In that case the worker can work in comfort, safe, healthy, efficient and productive so it can increase productivity. This research was perfomed at office house at Denpasar City.  Type of this research is experimental research by using treatment by subject design by involving 16 samples.  Interval between before treatment and after treatment is given washing out for two days.  Data measured are the working load measured by the increasing of subjective complaint recorded by Nordic Body Map questionnaire, pulses, fatigue and working productivity.  Data of subjective complaint was analyzed by non-parametric statistic test using the Wilcoxon test with significance rate of ? = 0.05, data of pulses as indicator of working load,  working productivity was priorly data normality tested by Shapiro-Wilk Test with significance rate of ? = 0.05.  Data that normal distributed is continued with parametric statistic test using the t-paired test at significance rate of ? = 0.05. Research result shows that there is significant different (p<0.05) to working load variable, musculoskeletal complaint, fatigue and productivity.  At before treatment the average of pulses of ceiling painter is 118.95 + 2.30 dpm, average of musculoskeletal complaint is 78.50 + 5.84, average of fatigue is 74.22 + 388 and average of productivity is 0,070 + 0,017.  Whereas, at after treatment the average of pulses of ceiling painter is 111.89 + 6.58 dpm, average of musculoskeletal complaint is 61.61 + 1.71, average of fatigue is 64.50 + 2.88 and average of productivity is 0,086 + 0,070. Modification of painting roller holder stick turned out to decrease working load for 10,77%, musculoskeletal complaint for 21,51%, fatigue for 13,09%, and productivity is increasing for 22,85%. From discussion above it can be concluded that the modification of painting roller holder stick can decrease working load, musculoskeletal complaint, fatigue, and increase productivity.  In that case, it can be expected that the ceiling painter workers use this painting roller holder stick in order to minimize any complaint raises due to working process

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