scholarly journals Design and characteristic analysis of vibration feeding system for coal-gas dust-removal medium

Clean Energy ◽  
2020 ◽  
Author(s):  
Bing Liu ◽  
Lixin He ◽  
Xianglong Zhao ◽  
Qiang Qin ◽  
Yi Guo
Keyword(s):  
Control Unit ◽  
Dust Removal ◽  
Feeding System ◽  
Characteristic Analysis ◽  
Coal Gas ◽  
Measurement Variation ◽  
Gasification Process ◽  
Valve Opening ◽  
Design Requirements ◽  
Design Factors

Abstract A vibration feeder is a piece of equipment for rationing and conveying powder, particle and block materials. In order to test the regeneration performance of de-dusting medium for high-temperature coal gas, a set of de-dusting medium-feeding systems was designed quantitatively. The de-dusting medium-feeding system is used in the gasification process for cleaning coal gas. The system is mainly composed of a hopper unit, control unit and feeding unit. In order to optimize the feeding stability of the coal-gas dust-removal medium vibration feeding system, the setting and scope of the following design factors and operating factors are investigated. Specifically, it includes the influence of gate-valve-opening adjustment of the control unit on the feeding stability of a vibrating feeding system; the influence of the gap size of the dipleg of the control unit on the feeding sensitivity of the vibration system; the influence of the particle size of the de-dusting medium on the operating range of the vibrating feeding system; the influence of the digitization of the working-current indicator of electromagnetic vibrating feeders on measurement variation and the process variation of a vibration feeding system. This vibration feeding system can realize the function of precise and quantitative feeding of the de-dusting medium, which can meet the design requirements of subsequent experimental research.

CBM Learners

2009 ◽  
pp. 88-99
Author(s):  
Patricia A. Young
Keyword(s):  
Learning Environment ◽  
Instructional Strategies ◽  
Learning Outcomes ◽  
Learning Opportunities ◽  
Individualized Instruction ◽  
Frames Of Reference ◽  
Dynamic Learning ◽  
Design Requirements ◽  
Multiple Levels ◽  
Design Factors

The Learners (L1-L10) area centers on the needs of learners and learning. These design factors assist in providing a dynamic learning environment that is supportive of the learner’s cultural frames of reference and seeks to meet the learning outcomes of the project. The design factors are adaptive to learners on multiple levels including intellectual, motivational, and educational, thereby providing opportunities for individualized instruction. Other design factors in this area focus on meeting the needs of the target audience through a variety of strategies including providing opportunities to extend learning beyond design requirements; differentiating learning opportunities; empowering and engaging learners; instilling proactive learning; identifying educational objectives; enculturating the learner; and incorporating culture-based instructional strategies.

The Design of Patrol System Based on Image Acquisition

2013 ◽  
Vol 860-863 ◽  
pp. 2902-2905
Author(s):  
Guo Xin Li ◽  
Jian Wei Lu
Keyword(s):  
Image Acquisition ◽  
Control Unit ◽  
Central Control ◽  
Test Results ◽  
Patrol Officers ◽  
Central Control Unit ◽  
Design Requirements ◽  
Live Image ◽  
Design Ideas ◽  
Time Image

This article presents the design ideas of patrol system based on real-time image acquisition in patrol points. In this system, the image acquisition terminals are mounted on many patrol points, which are set in a predetermined patrol line. When patrol officers arrived at a patrol point, the image acquisition terminal mounted on the patrol point will capture a live image via a GPRS MMS module ,and then the image acquisition terminal sends this image to the central control unit in a form of MMS. The central control unit receives the sent MMS message, and separate out the image information from the received message, and then saves it to a database. According to the actual test results of this patrol system, it can not only meet the design requirements, but also the whole system has a high stability and reliability.

The Statics Characteristic Analysis of Fixed Beam Gantry Machine Tool Crossbeam Based on ANSYS

2015 ◽  
Vol 757 ◽  
pp. 81-85
Author(s):  
Chun Ming Song ◽  
Ming Cao ◽  
Dong Sheng Zhang
Keyword(s):  
Finite Element ◽  
Machine Tool ◽  
Middle Part ◽  
The Finite Element Method ◽  
Characteristic Analysis ◽  
Element Analysis ◽  
Maximum Deformation ◽  
Design Requirements ◽  
Stress And Deformation ◽  
Gantry Machine Tool

In order to calculate the crossbeam’s stress and deformation under the weight of gantry machine tool, and analyze whether the deformation meets the precision of design requirements. In this paper, we will use the finite element method to get the stress and deformation in different directions with finite element analysis software-ANSYS. The result shows that the maximum deformation is 14.3 microns which appeared in the middle part of the beam towards the gravity direction and the maximum stress is 4730000 Pa which appeared in the joint of pillar and beam.

Robustness Analysis & Design for the Driver of the DC Motor

2012 ◽  
Vol 538-541 ◽  
pp. 3051-3054
Author(s):  
Guo Liang Liu ◽  
Jian Feng Li
Keyword(s):  
Control System ◽  
Robustness Analysis ◽  
Control Unit ◽  
Dc Motor ◽  
Practical Application ◽  
Uncertainty Model ◽  
Variation Range ◽  
Robust Control System ◽  
Design Requirements ◽  
Analysis Design

Abstract.For the control unit in a control system, under a certain type of perturbations, including the disturbance of its own model, the property that system maintains certain performance parameter to designed index is defined as robustness. A designed system is robust when its response does not dissatisfy design requirements under model parameter variations.In practical application, it is not unusual that some parameters of system model are not precisely known. Such parameter is defined as uncertain parameter, because its value varies within a given range, even though its nominal value and variation range are known.In this article, in order to design a robust control system, MATLAB is utilized to perform robustness analysis by establishing an uncertainty model of DC motor.

Study on Simulation of the Chain Transmission Mechanism

2012 ◽  
Vol 591-593 ◽  
pp. 797-800 ◽  
Author(s):  
Yong Xia Liu ◽  
Shu Liang Zou ◽  
Tao Tang ◽  
Qi Wang Zhou
Keyword(s):  
Optimization Design ◽  
Transmission Mechanism ◽  
Mechanical Equipment ◽  
Feeding System ◽  
Affecting Factors ◽  
Roller Chain ◽  
Chain Transmission ◽  
Design Requirements ◽  
Sprocket Wheel

The chain transmission’s feature, the main failure form of roller chain and the research for the simulation of the chain transmission mechanism are introduced. Taking the simulation of the chain transmission mechanism in feeding system of a mechanical equipment as the research object, the kinematical properties and the affecting factors are analysed in this paper. It adopts the advanced connection pair to establish relationship between the sprocket-wheel and rollers, and realistically simulates the kinematical characteristics of the chain transmission mechanism. It provides a reference for the optimization design of the structure of the chain and sprocket wheel, through the analysis on the moving velocity and acceleration curve of the chain. It also provides a basis for verifying whether the chain and sprocket-wheel meet the design requirements or not.

Performance Assessment of Turbojet Engine Operated With Alternative Biodiesel

2013 ◽  
Author(s):  
Mohamed Noureldin Ibrahim ◽  
Ahmed Hamza H. Ali ◽  
S. Ookawara
Keyword(s):  
Methyl Ester ◽  
Volume Flow Rate ◽  
Chemical Properties ◽  
Calorific Value ◽  
Control Unit ◽  
Biodiesel Fuel ◽  
Throttle Valve ◽  
Turbojet Engine ◽  
Valve Opening ◽  
Biodiesel Fuels

This study investigated experimentally the performance of turbojet engine fueled by biodiesel obtained from different feedstocks. The engine is equipped with measuring sensors for pressure, temperature, thrust, shaft speed in addition to flow meter, data acquisition system and a control unit. The results of the effect of biodiesel fuel type and its blends on turbojet engine performance are presented. Three biodiesel fuels which are Cotton methyl ester (CTME), Corn methyl ester (CRME) and Sunflower methyl ester (SME) and their blends of B10, B20 and B50 (10%, 20% and 50% biodiesel/Jet A1 by volume) are used and compared with the engine recommended fuel (Jet A1). Moreover, in this study, the Biodiesel fuel is produced through transesterification process in which the triglyceride (oil) reacts with alcohol (methanol) to form the mono-alkyl ester (biodiesel) and glycerol. Physical and chemical properties of all produced and tested fuels are measured. The results clearly indicate that the produced biodiesel fuels have a higher density, kinematic viscosity, than JetA-1 fuel, while, the calorific value of biodiesel fuels is very close to JetA-1 fuel. Moreover, JetA-1 fuel has higher sulfur content than other biodiesel fuels. Also, the experimental results show that Engine speed for the cases of using biodiesel fuels is lower than JetA-1 fuel at the same fuel throttle valve opening. Moreover, the Biodiesel fuels have a lower fuel volume flow rate compared to JetA-1 at the same throttle valve opening that lead to decrease the engine static thrust as well as lower value of TSFC.

New Design of Selective Leakage Protective System in Underground LV Distribution Network

2014 ◽  
Vol 672-674 ◽  
pp. 940-944
Author(s):  
Liu Fang Zhang
Keyword(s):  
Distribution Network ◽  
Control Unit ◽  
Current Sensor ◽  
Central Control ◽  
Single Chip ◽  
Central Control Unit ◽  
Simulated Experiment ◽  
Protective System ◽  
Design Requirements ◽  
Dc Current

Using DC current sensor as current detecting element in leakage protective in underground LV distribution network and single chip processor as central control unit,a new computerized DC examination and selective leakage protective system is formed. Hardware and software designs are introduced in the essay. The simulated experiment results show that all the property indexes of the system reach the design requirements and achieve good results.

Developing an Automated Feeding System for Distributing Concentrated Goat Feed

2020 ◽  
Vol 36 (2) ◽  
pp. 125-140
Author(s):  
Yi-Chich Chiu ◽  
Wei-Chih Tsai ◽  
Gang-Jhy Wu Wu
Keyword(s):  
Feeding Strategy ◽  
Field Tests ◽  
Control Unit ◽  
Small Scale ◽  
Farm Labor ◽  
Growth Stages ◽  
Feeding System ◽  
Labor Shortage ◽  
Feeding Zone ◽  
Additional Labor

Highlights An automatic feeding system, employing a suspended-type feed dispenser and capable of detecting different zones and accordingly adjusting the quantity of feed distributed, was designed for distributing concentrated feed to goats.The assigned tasks were satisfactorily completed by the system with no major malfunctions or problems.The farmer of the test barn reported a 10% increase in lactation quantity with no additional labor.The automatic feeding system is a means of resolving the labor shortage problem and achieving an improved feeding strategy for goat husbandry.Abstract. To resolve the labor shortage problem and to achieve better feeding strategy for goat husbandry in Taiwan, an automatic feeding system (AFS) was developed. Because of the relatively small scale of Taiwanese goat farms, goats at various growth stages are kept in the same barn but separated into zones. Different concentrated feed formulas are needed for goats at different growth stages. The majority of goat farms in Taiwan adopt elevated-floor-type barn. The zone-separating fences and the meshed floors hinder the application of walking-type feed dispenser. Corresponding to the farming conditions, the AFS was designed to use suspended-type feed dispenser and is capable of detecting different zones and adjusting the distribution proportion accordingly. This system comprises a feed bucket and distribution unit, a suspended feed bucket moving unit, and a sensor control unit. A programmable logic controller is used as the controller. Electric power needed to move the dispenser and to power other devices is translated through a conductor rail system, and the control signals are transmitted using wireless transceivers. The feed bucket incorporates two sub-buckets for different types of feed and distributes different proportions and quantities of feed at different times according to the feeding zone. A vibrating motor was used to prevent bridging and jamming of feeds inside feed buckets. The system was also equipped with ultrasonic sensors to detect the quantity of feed remaining in the buckets and proceeded with an automatic refilling procedure when the quantity remaining is too low. A maximum of 12 time periods for feeding can be scheduled daily. Functional tests results showed that the AFS could achieve the design goals, which include evenly dispensing various proportion concentrated feeds according to the zones, at several set disperser travelling speeds. The vibrating motor could realize zero feed remaining in the feed buckets. Field tests were carried out in a 55- × 10-m goat barn with 385 goats for six months. The barn was divided into six zones. Goats were fed 8 times per day, four times as much as compared to the conventional feeding scheme, with preset amounts of concentrated feed distributed per goat per meal. Field test results indicated that the AFS could satisfactorily fulfill the assigned tasks with no major malfunction or problem. In addition, the farmer of the test barn reported a 10% increase of lactation quantity with no additional labor after using the system for 1 year. This system proved to be feasible, have practical value and commercial potential. An extensive application of this system in the future is expected to resolve the labor shortage that besets goat farming. Keywords: Automatic, Goat farm, Labor saving, Smart agriculture.

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