Performance Of Feeder Research Articles

Study Of Particles Flow Over Industrial Wobbler Type Feeder Using Discrete Element Method

Wobbler feeders are generally used to feed coarse material to the primary crusher in the mine and aggregate applications. In the operation, finer particles are also screened through the spaces among rollers and wobbling of the rocks through the roller cause impact and rubbing effect that helps to move undesired particle over batches. Motion of the materials on the feeder depends on design parameters such as roller size, rotation speed, spacing etc. and also gradation of the bulk material that fed into the feeder. The performance investigation of the feeder heavily relies on experimental studies due to complex motion of the material on the feeder as well as particle interaction in the batch. Discrete Element Method is a method that used to compute motion of large number of particles in a granular flow and it is widely accepted as an effective method in the rock mechanics. In this study, DEM is used to investigate the performance of a wobbler feeder. The feeder is designed and simulated for different parameters such as spacing, roller speed, particle shape and gradation in The Rocky DEM software. The particle velocities and trajectories were determined, and particle resident times were calculated to investigate the efficiency of the feeder for different disc configurations.

Design of a yarn feeder based on a piezoelectric actuator

Yarn feeding is a crucial step in various stages of the textile industry, and plays an important role in ensuring the stable operation of knitting machines. In response to the working environment of yarn feeders and the periodic intermittent yarn usage in loop forming systems, this paper proposes a new type of piezoelectric-actuated yarn feeder with the characteristics of small size, low energy consumption, switchable yarn feeding modes, and self-locking. The working principle of the new yarn feeder is systematically analyzed and simulated, and the performance of the yarn feeder is experimentally investigated and compared with theoretical analysis. The relationship curves between yarn feeding speed and driving frequency, as well as yarn feeding speed and driving voltage peak-to-peak value, are drawn, and the stability segmentation line of the yarn feeder is defined. The yarn feeding accuracy of the proposed yarn feeder is verified, and the displacement-time relationship curves of yarn under different conditions are plotted to explore the yarn feeding characteristics. In summary, the proposed piezoelectric-actuated yarn feeder has good performance and can meet the needs of practical production processes. It provides a valuable reference for the combination of piezoelectric driving and the textile industry.

Results of the study of rotary feed pump with separator and screw feeder

The article presents the results of an analysis of experimental studies of a rotary lobe pump with a separator and a screw feeder. The pressure loss in the feed line, the influence of the shape of the separator and the angle between its working edges on the performance characteristics of the pump, the influence of the performance of the screw feeder on the characteristics of the pump and the influence of the rotation speed of the pump shaft on its characteristics are studied. characteristics. As a result of experimental studies, it was established that a rotary pump with a screw feeder reliably transports feed mixtures with grass paste with a moisture content of 74% or more and feed mixtures without grass with a moisture content of 68% or more at a pressure in the discharge line of 0.4 MPa. In this case, the speed of the feed mixture in the suction cavity of the pump must be at least 0.42 m/s, which is ensured by a screw feeder.

Development of Automatic Fish Feeding Machine for Integrated Floating Cage Aquageoponic System

Aims: The objective of this work was to develop and evaluate the performance of an automatic fish feeder- to enhance aquacultural practices and farmponds
 Place and Duration of Study: The research study was conducted at Madakasira, (Latitude: 13°56ʹ55.96″ N and Longitude: 77°18ʹ45.38″ E) which is located in Anantapur district of Andhra Pradesh, India. The mean annual temperature and annual rainfall of the study area are 27.6°C and 532 mm, respectively. Most of the rainfall (~80%) is received during South-West monsoon. The experiment study was conducted from March‒June, 2018.
 Methodology: Automatic fish feeder includes both electrical and mechanical mechanism. The materials includes for the development of the feeder was cone shape hopper, top covering lid, base, 12V DC motor, 12V 7Ah Rechargeable Lead Acid Battery, Arduino Uno, Bluetooth HC-05 module, 5v Relay, DC-DC step-down converter. The developed feeder was operated with the help of mobile app by using Bluetooth HC-05 module. The spreading distance and amount of feed spread, opening angles of the feeder were evaluated during the research period.
 Results: Our results showed that the amount of feed spread was maximum (140 g m-1) with 1.0 m height and was minimum (101 g m-1) at 0.2 m height. This results clearly shows that the fish feeder has to be kept at maximum height so that it covers maximum spreading distance with minimum loss of fish feed by drift. With increase in height of the machine from ground surface, the spreading distance of the fish feed from the feeding machine was also increased.
 Conclusion: Farmers were satisfied with this new technology which helps to avoid manual feeding and provides the clean environment.

Enhancing voltage regulation using 5‐level TCHB based DVR in radial secondary distribution feeder system

SummaryThe voltage quality issues shows the significant effect on the performance of radial secondary distribution feeder. This paper aims to enhance the voltage regulation of radial secondary distribution feeder system using 5‐level TCHB inverter based dynamic voltage restorer. Series voltage drop is the major factor causes poor voltage regulation. A 5‐level TCHB inverter based DVR is used to inject the same amount of voltage dropped by series impedance. The DVR injects voltage with proper magnitude, phase and frequency with the proposed single phase PLL based SRF control circuitry. This enhances the voltage regulation by maintaining the load voltage at its rated value. Both the simulation and hardware results shows the enhancement of voltage regulation with mitigation using DVR.

Experimental study of the performance of a root crop loader with a paddle feeder

The article presents the results of experimental studies of the performance of a paddle feeder for a continuous root crop loader. The studies have obtained regression equations and graphical dependences of productivity when changing the angular speed of the blade rotation, the speed of the forward movement of the feeder with the loader, as well as the radius of the cylindrical blades. The results of experimental studies show that the performance of a paddle feeder of a continuous loader when working with potatoes is in a non-linear dependence on the studied parameters and is described by a second-order equation. The values of the studied parameters are established, at which the performance is of the greatest importance.

Evaluation of fish feeder manufactured from local raw materials

An automatic feeder for fish feeding was manufactured and evaluated successively. Feed pellet size, air flow rate and feeder screw speed were the most important factors affecting the performance and efficiency of the automatic feeder. It was tested at 3 sizes of pellets (1, 2 and 3 mm), 3 air flow rates (10, 15 and 20 m3 min−1) and 5 screw speeds (180, 360, 540, 720 and 900 rpm). The automatic feeder productivity, efficiency, specific energy consumption and costs were determined. The obtained results indicated that the automatic feeder productivity increases with increasing feed pellets size, air flow rate and rotational speed of screw treatments under study, the automatic feeder efficiency increased with increasing rotational speed of screw until it reached the highest value at 540 rpm and then remain constant at 720–900 rpm and after that decreased with increasing speed. Meanwhile, the specific energy consumption of automatic feeder decreased with increasing feed pellets size, air flow rate and rotational speed of screw treatments under study. The total cost of using automatic feeder ranged from 0.09 to 0.16 EGP kg−1 ($ = 15.63 EGP) for all treatments under study. This feeder will save time, effort and cost for fish industry.

Optimal Siting and Sizing of Battery Energy Storage: Case Study Seventh Feeder at Nakhon Phanom Substation in Thailand

The optimal siting and sizing of battery energy storage system (BESS) is proposed in this study to improve the performance of the seventh feeder at Nakhon Phanom substation, which is a distribution network with the connected photovoltaic (PV) in Thailand. The considered objective function aims to improve the distribution network performance by minimizing costs incurred in the distribution network within a day, comprising of voltage regulation cost, real power loss cost, and peak demand cost. Particle swarm optimization (PSO) is applied to solve the optimization problem. It is found that the optimal siting and sizing of the BESS installation could improve the performance of the distribution network in terms of cost minimization, voltage profile, real power loss, and peak demand. The results are investigated from three cases where case 1 is without PV and BESS installation, case 2 is with only PV installation, and case 3 is with PV and BESS installations. The comparison results show that case 3 provided the best costs, voltage deviation, real power loss, and peak demand compared to those of cases 1 and 2; system costs provided by cases 1, 2 and 3 are USD 4598, USD 5418, and USD 1467, respectively.

Vibratory Feeding Performance Improvement Through Discrete Element Analysis for High-Speed Optical Detection of LED Chips

A high-speed vibratory bowl feeder is a key equipment of the optical detection of light emitting diode (LED) chips. Addressing the stationarity-losing problem induced by transporting small-size and light-weight LED chips, this study designs a vibratory bowl feeder for the high-speed detection of small LED chips based on theoretical and numerical analyses. To understand the influence of the structural parameters of the feeder on its performance, we create a mathematical model of the part's behavior base on the Hertz-Mindlin contact theory. The numerical model indicates that the property of the part, the track angle and the friction coefficient of the track are the main factors that affect the behavior of the part in the feeding process. Through the discrete element method (DEM) simulation, we observe the part behavior under different track angles and friction coefficients of the feeder. The motion stationary of the LED chip is evaluated by its standard deviation (STD) of velocity and hopping height. Thus, we can appropriately determine these parameters of the vibratory feeder in order to get the optimal feeding performance. Finally, an experimental platform of the LED chip detection device is built to verify the performance of the vibratory bowl feeder. The experimental results show that the performance of the feeder was in good agreement with the simulation results. With the theoretical analysis and experimental verification, the vibratory bowl feeder was successfully implemented for LED transportation and reached a high feeding velocity of 1516.5 pieces/min at the working frequency of 223 Hz.

Condition Monitoring of a Paper Feeding Mechanism Using Model-of-Signals as Machine Learning Features

Prognostics and Health Management of machine devices and parts is a hot topic in the Industry 4.0 era. In this fashion, automated procedures to evaluate machinery working conditions are essential to minimize downtime and maintenance costs. In this work, we study how to monitor the decrease in performance of a paper sheet feeder for the packaging industry under heavy-duty cycle operations. The main measurable outcome of such degradation is the increase in backlash among the device moving components. A wide variety of methods and procedures is available to tackle this monitoring problem. In this paper, we analyze the use of a simple yet efficient diagnosis methodology that can exploit machinery controllers (i.e., Programmable Logic Controllers) edge-computing capabilities. Vibration measurements are known in the literature to retain information about the system's mechanics. Model-of Signals, a data-driven approach based on black box system identification, allows to extract that information reliably during machinery working cycle. The refinement of those data using machine learning allows the retrieval of knowledge about the health state of the machine. In this study, the feeder mechanism is run to failure with its parts backlash measured at given time intervals. Accelerometer signals are modelled as AutoRegressive processes whose coefficients are then considered as features to feed to machine learning algorithms, which are employed to perform severity evaluation of the ongoing degradation. Estimation and prediction are both implementable on-board the controller, while the learning task can be carried out remotely, in a cloud computing perspective. The exploitation of AutoRegressive modelling gives a simple and inherent methodology for feature selection, serving as a foundation of the machine learning stage. We make use of a Support Vector Machine algorithm to analyze how obtained models represent the various levels of backlash in the device and develop a suitable predictor of the degradation severity. Finally, the results of the application of the methodology to the case study are shown.

Designing nano-aluminum laden fuel pump for aviation applications

In view of the fact that traditional liquid propellants cannot meet the design requirements of large-thrust flight vehicle, it has become a new trend to add nano-metal powder to liquid propellants to greatly increase density and specific impulse. In order to achieve the variable flow-rate and variable-proportion transportation of aviation fuel with nano-aluminum, a new type of solid-liquid mixing pumping system is designed, including powder conveying device, stirring device, pump and corresponding drive and transmission system. For the purpose of avoiding the frictional contact between the rotors, which will bring potential hazard to nano-aluminum powder, a non-contact twin-screw pump with synchronous gears is designed. Among them, based on the considerations of flow pulsation, volumetric efficiency and manufacturing difficulty, cycloid profile is adopted for screw rotors. After completing the functional design, geometric parameter design, structural design, 3D modeling, prototype manufacturing and preliminary performance estimation of the mixing pumping system, the performance of the screw feeder, agitator, screw pump was tested through experiments to meet the expected design requirements. The designed agitator can achieve sufficient mixing at 500 rpm in less than 10 s. Even though 50-micron clearances are designed with a relatively small rotor diameter, the volumetric efficiency of screw pump can reach above 50% when the discharge pressure is below 450 kPa and the flow rate is set as 10 L/min, the power of the screw pump is less than 700 W. This design facilitates the rapid real-time preparation of metallized propellants and provides a reference for further improving the design and control methods of nanoparticle two-phase flow pumping.

Performance and noise analysis of vibratory feeder using dynamic rubber spring model

In vibratory feeder, material feeding occurs due to the vibration of a trough mounted on helical springs. High vibration amplitude of trough causes the springs to jump and usually results in higher noise level generation and increase in force transmissibility in the support structure of the feeder. Reducing this noise without having significant changes in the dynamics of the feeder unit is a major challenge in the present industries. This paper presents a dynamic rubber spring model for vibratory feeders to reduce the noise level and the force transferred to the support structure of the feeder. Measurement of dynamic parameters such as vibration amplitude and magnitude of force transmitted to support structure, noise level, and conveying speed of particle analyses have been conducted experimentally on vibratory feeder with and without rubber gasket installed at spring support structure. The use of rubber gaskets at spring supports and their implication on force transmissibility and noise level of feeder is established experimentally. The performance analysis of feeder was also conducted using particle conveying speed on trough for different setups of feeder unit. It was found that the introduction of rubber gaskets at spring supports of the feeder increases the system damping, which helps in noise reduction as well as reduced amplitude of vibration and higher acceleration of trough. The increased acceleration leads to higher particle conveying velocity on the feeder trough.

Prediction of Diesel Fired Power Plant Feeder Performance using First Order Fuzzy Time Series

Power outages caused by factors outside the established policy will have an impact on the decline in electricity supply services and other cost related impacts. The reliability of the power plant feeder, in this case, is very important to monitor and maintain. The performance of power plant feeder can be reviewed based on the variable duration of power outage and power which fails to distribute. In this study, 1st order FTS (Fuzzy Time Series) is used to predict the feeder's performance through the predictive activity of both those variables in the actual year and the following year. The prediction results state that in 2017 there was a 20.54% decrease in performance

Scheduling Maintenance of Cooling System based on Risk Priority Number (RPN) using Adaptive Neural Network

Power outages caused by factors outside the established policy will have an impact on the decline in electricity supply services and other cost related impacts. The reliability of the power plant feeder, in this case, is very important to monitor and maintain. The performance of power plant feeder can be reviewed based on the variable duration of power outage and power which fails to distribute. In this study, 1st order FTS (Fuzzy Time Series) is used to predict the feeder's performance through the predictive activity of both those variables in the actual year and the following year. The prediction results state that in 2017 there was a 20.54% decrease in performance.

Conveying Characteristics of Dual Pneumatic Feeder Used for Biomass Pyrolysis

A novel dual pneumatic feeder was developed to achieve constant and steady biomass conveying for pyrolysis. To facilitate the feedstock replenishment, an injection pipe was installed inside a pressure chamber to convey the feedstock. Another stream of gas entered the pressure chamber from the bottom to fluidize the particles. Experiments were performed to test the performance of the new feeder, and three injection pipes and gas distributors were used. Results showed that the feeding rate depended on both the injection and fluidizing gas velocities. The feeding rate decreased with the inner diameter (ID) of an injection pipe, due to its impact on gas velocity, while the effective injection distance had a negative effect within a certain range. The opening ratio of the gas distributors had a positive effect on the feeding rate. Then, a model was developed, based on the Ergun equation, to describe relationships between the feeding rate and the gas velocities. The classical equation was further reformed to establish the correlation between the solid mass flowrate and the construction parameters of the feeder. The developed model deviated from the measured values within ± 15%, which was considered capable to predict the feeder performances.

Fuzzy Logic Controller Based Distributed Generation Integration Strategy for Stochastic Performance Improvement

In the restructured environment, distributed generation (DG) is considered as a very promising option due to a high initial capital cost of conventional plants, environmental concerns, and power shortage. Apart from the above, distributed generation (DG) has also abilities to improve performance of feeder. Most of the distribution feeders have radial structure, which compel to observe the impact of distributed generations on feeder performance, having different characteristics and composition of time varying static ZIP load models. Two fuzzy-based expert system is proposed for selecting and ranking the most appropriated periods to an integration of distributed generations with a feeder. Madami type fuzzy logic controller was developed for sizing of distributed generation, whereas Sugeno type fuzzy logic controller was developed for the DG location. Input parameters for Madami fuzzy logic controller are substation reserve capacity, feeder power loss to load ratio, voltage unbalance, and apparent power imbalances. DG output, survivability index, and node distance from substation are chosen as input to Sugeno type fuzzy logic controller. The stochastic performance of proposed fuzzy expert systems was evaluated on a modified IEEE 37 node test feeder with 15 minutes characteristics time interval varying static ZIP load models.

Investigation on Structural Design and Coupled Finite Element Analysis of CS 3L Feeder for ITER

The central solenoid (CS) 3L feeder is applied to convey the coolant and electrical energy to the CS as well as house the instrumentation wiring. Due to cryogenic and complex electro-magnetic (EM) environment, CS 3L feeder suffers great thermal contract and huge Lorentz force. This paper aims at investigating the structural design of some key components and mechanical performance of CS 3L feeder. Due to complicated geometry and large scale, the electromagnetic–structural coupling analysis of CS 3L feeder is performed based on loading equivalent transfer principle, the results indicate that the main structure is reasonable, which provides a feasible option for practical engineering consideration. Finally, the further structural optimization, insulation, thermal analysis and seismic analysis are put forward.

A Piezoelectric Feeder with Magnetic Spring

Proposed a new type of piezoelectric feeder uses the magnet principle to change the vibration performance and the system resonance principle. The working principle of the piezoelectric feeder was analyzed, the kinetic model was established, and the main factor which affects the delivery performance of the resonant feeder was obtained by calculation, and then designed the prototype. The resonant frequency of the system obtained by the impedance analyzer, and the displacement magnification of the piezoelectric vibrator were obtained by using the laser displacement meter. Design the speed experiment device of the resonant feeder, obtained the influence of the magnetic spring gap on output speed. The experimental show that when the input voltage is 150v, the frequency is 140Hz and the magnetic spring gap is 8mm, the system achieved the desired working condition, the displacement magnification of the piezoelectric vibrator is about 2.46 times, the optimum speed is 80cm/min.

Assessment of reactive power contribution of photovoltaic energy systems on voltage profile and stability of distribution systems

This paper studies the impact of large-scale photovoltaic (PV) generation, up to 50% penetration level, on distribution system voltage regulation and voltage stability. The system voltage profiles are computed using power-flow calculations with load variation of a 24-h time scale. The steady-state voltage stability is examined at different times of the day using a developed continuation power-flow method with demand as continuation parameter and up to the maximum loading conditions. The load-flow analysis, implemented for both voltage regulation and voltage stability analysis, is performed by using the forward/backward sweep method. The secant predictor technique is developed for predicting the node voltages which are then corrected using the load flow solver. Three models of the PV interface inverter are implemented in this study with full set of data representing environmental conditions. The voltage profiles are regulated using the PV interface inverters, where the available inverter capacity is utilized for regulating the system node voltages. The most possible scenarios of system voltage collapse are investigated at different times of the study period. The developed methods and models are used to assess the performance of a 33-bus radial distribution feeder which operates with a high level of PV penetration. The results show that the PV interface inverters operate for reactive power support in distribution system resulting in improved voltage profile, secure power systems operation, and increasing the lifetime of the online tap changing transformers due to minimizing the total number of switching operations.

An Experimental Study on the Driving System of Vibratory Feeding

This paper describes the development of vibratory transmission system, and concentrates on its driving technology. Vibratory feeder is used to transfer parts from one place to another by vibration which plays an important role in assembly automation. Decoupled vibratory feeder (DVF) is a novel feeder which can be excited in two mutual perpendicular directions. In decoupled vibratory feeder system (DVFS), vibration angle, frequency and waveform of driving signals can be easily adjusted in software way, as well as the phase angle between vertical vibration and horizontal vibration, so DVFS has a great superiority. Up to now, two DVFS prototypes have been successfully developed, but the driving technology cannot meet the demands of parts’ smooth moving. The electromagnet, the core of the drive system, should be optimized in its external dimensions and drive performance. And we fabricate a series of electromagnets. To test electromagnet performance, a test system has been designed. Presently, two researches on the electromagnet driving circuit have been made in our laboratory. One method is to receive analog signal from D/A output, then drive electromagnet through power amplifier. The other method actually is to use a switching circuit controlled by PWM technology. In this paper, we used the latter method in the test system and control system. The author makes experience about influencing factors of the electromagnetic force and gets some data. Also, the controller has greatly improved the performance of vibratory feeder. DOI: http://dx.doi.org/10.11591/telkomnika.v11i10.3415