bluuebunny/crossref_metadata_2025 huggingface dataset:
Position Equation Establishment and Kinematics Analysis of 3-RRC Parallel Mechanism
Authors: Qian Yong Ming
Published: October 2014

Position equation of 3-RRC parallel mechanism is established and its position direct and inverse solution is solved. The mechanism rate equation is established and its kinematics analysis is done. The result shows that it is easier to solve the kinematics inverse solution of the parallel mechanism.
Biogas Purification Using Natural Zeolite and NaOH
Authors: Widyanuriawan Denny , Sugiarto
Published: October 2014

Biogas purification is the most important process to increase the quality of biogas. This research was introduced a continuous system of biogas purification from CO2 impurity using zeolite and NaOH solution. The granular zeolites were varied from 1 to 5 layers on solid purifier. The NaOH solution was varied from 10% to 50 % based on concentration. Contact time of biogas with zeolite and NaOH solution were observed on interval of 15 minutes. The results showed that the ability of NaOH solution to absorb of CO2 is faster than zeolite. On the initial minutes, NaOH solution on the some concentration absorbed the CO2 until less than 10% of volume CO2 in biogas. Furthermore, the five layers of zeolites able to adsorb the CO2 until the 21.3% of volume CO2 in biogas on 60 minutes. For a similiar condition, CH4 levels increased to be 74.7% and 92.4% for zeolite and NaOH solution, respectively. The ability of CO2 absorbsion was influenced by layers number of zeolite purification system and the concentration of NaOH solution for NaOH purification system.
The Research of Topical Analgesic Effect on Arisaema Wine Paste, Vinegar Paste
Authors: Miao Ming San , Guo Lin , Cao Shan , Guo Xiao Fang
Published: October 2014

To study the analgesic effect of Arisaema wine paste, vinegar paste for external use. By two pain tests induced by formaldehyde and by hot plate ,observing the effect of high and low-dose of different varieties Arisaema with wine paste and vinegar paste on the the behavior of model mice.In the pain tests induced by formaldehyde,after administration of 5min and 10min,high and low-dose of different varieties Arisaema with wine paste and vinegar paste can significantly reduced the number of times of mice licking foot (P<0.01).In the pain tests induced by hot plate,after the administration of 30min ~ 90min, ,high and low-dose of different varieties Arisaema with wine paste and vinegar paste can significantly significantly increased the pain threshold of mice (P<0.01). Arisaema topical has good therapeutic effect on mice induced pain model, and topical analgesic effect of Arisaema is better.
The Study on Open-Celled Morphology of Polymer Blends in Vibration
Authors: Li Bing , Huang Bao Shan , Nan Qiao Zhou , Qin Xue Mei
Published: October 2014

The purpose of this research is to analysis on cell morphology of polymer blends foam in different vibration parameters. In this study, foamed was produced using a dynamic simulation foaming setup designed by ourselves. The addition of the vibration force field improved the cell nucleation. At the same time, the vibration reduce the polymer viscosity and increase the dissolution of CO2, which improve the content of open-celled microcellular foam.
Influence of Sintering Temperature on the Thermoluminescence Spectra of MgSO4 Doped with RE(Tm,Dy) and Mn
Authors: Guo Jing Yuan , Tang Qiang , Gao Li , Lan Ting Ting , Zhang Chun Xiang , Luo Da Ling , Tan Zhi Jian
Published: October 2014

In this paper, MgSO4:Dy,MgSO4:Tm and MgSO4:Mn phosphors are prepare by high temperature solid state reaction. The MgSO4:Dy or MgSO4:Tm powder are mixed and sintered with MgSO4:Mn respectively to obtain the co-doped MgSO4:Dy,Mn and MgSO4:Tm,Mn phosphors. The 3-dimensional thermoluminescence spectra of these two phosphors under different sintering temperature are measured.Results show that when the sintering temperature is below 800°C, Dy, Tm and Mn ions emissions are independent. However, when the sintering temperature was over 800°C, the emission peak of Mn becomes weaker, and so do the low temperature peaks of Dy and Tm, while the high temperature peaks of Dy and Tm become stronger. This indicated that the defect complex structure in the formation of the thermoluminescence material depends on the sintering temperature. As the sintering temperature rises, more and more Mn ions combine with the rare earth ions. Therefore, the luminescence process of the energy transfer of Mn ions to the rare earth ions can be observed and the suppression to low temperature peaks of Tm and Dy, and also shown in spectra.
A Framework for Conversion of Plastic Waste into Fuels and Chemicals: A Review of the Waste Current Situation in Libya
Authors: Alajail Abdalla I. , Seedahmed Ahmed I. , Abdalla Babiker K. , Shaneb Omer A.
Published: October 2014

Pyrolysis of waste plastics is one of the routes used for waste minimization, which has been gaining interest in recent years as a feedstock method.In this work, the two universal problems: plastics waste and fuel shortage have been addressed simultaneously. The process of converting PP and PE plastics waste in Libya into fuel and chemicals was overviewed. Data concerning Plastic Industry in Libya was collected to which some projection of the future production rate and waste rate has been estimated.Keywords: Plastic waste; recycling of polymers; waste management.
Effect of Blade Inclining Angle on Internal Characteristic of Hydraulic Retarder
Authors: Xiao Hui , Chu Ya Xu
Published: October 2014

Based on CFD software platform the numerical simulation of internal characteristic of hydraulic retarder was performed by moving mesh method with the RNG turbulence model and the SIMPLEC algorithm simultaneously, the internal characteristics of velocity and pressure distribution were analyzed through the numerical simulation and post-processing. Comparing the calculation braking torque with the simulation results. The result shows that the model under 42°vane degree has the biggest impact.
Influence of Spark Plasma Sintering (SPS) Modes on Structure of Multilayer Metal - Intermetallic Composites Based on Nickel and Aluminum
Authors: Sameyshcheva T.S. , Bysyina S.I , Thömmes Alexander
Published: October 2014

Structural features of laminated “nickel - nickel aluminide” composite materials obtained by SPS - sintering of alternately stacked nickel and aluminum foil, thickness 100 and 25 m respectively, have been investigated in this paper. The composition of diffusion layers formed due to the reaction between nickel and aluminum was studied using energy dispersive X-ray microanalysis and X-ray diffraction methods. It was found that phase composition of diffusion layers significantly depends on SPS - sintering temperature.
Microstructure and Strength of Explosively Welded Titanium/Ni-Based Alloy Composite with Cu/Ta as Interlayer
Authors: Mali Vjacheslav I. , Maliutina Iuliia N. , Skorokhod K.A.
Published: October 2014

In current research composite copper/tantalum were used as interlayer for explosive welding of titanium and Ni-based alloy sheets. Defects such as cracks coupled with brittle intermetallics compounds were not detected at the interface of dissimilar materials by metallographic analysis. Strength test of obtained composite material reveals growth of yield strength in 2 times in comparison with Ni-based alloy.
Research of Operational Characterizations of Cutting Discs with Oriented Abrasive Grains
Authors: Korotkov V.A. , Petrushin S.I.
Published: October 2014

Efficiency of the polishing process is determined by the properties of abrasive grains, including its form parameter and orientation in the body of the grinding tool. It is possible to improve the operational characterizations of the grinding instruments, in particular – cutting discs, by ordering of the grain geometry, selection of the rational form and orientation of abrasive grains for specific processing conditions and parameters of the power load. For the solution of such problem the developed and patented method for production of grinding tools with the orientated abrasive grains is offered [1]. According to the specified method the cutting discs with radial and tangential orientation of abrasive grains are made. As a comparative standard, discs without orientation of abrasive grains are made also. Comparative tests by cutting according to the scheme of pressing of workpiece to a disc with a constant effort are carried out. It is established that orientation of abrasive grains significantly influences the operational characterizations of cutting discs. So, the cutting ability of cutting discs with radial orientation of abrasive grains is 15-17% higher during processing of various materials, than at standard tools. The grinding coefficient of cutting discs with tangential orientation of abrasive grains is 25-29% higher, than at usual discs with non-oriented grains. Results of an assessment of effective power of cutting in addition confirm that discs with the radial orientation of grains are working with the greatest intensity and at the same time with biggest wear. Further, on decrease, cutting discs with non-oriented grains follow. Instruments with tangential orientation of abrasive grains are characterized by the smallest cutting ability and the smallest wear. Such effect is caused by that the radial focused abrasive grains possess the greatest sizes of forward corners, and tangential focused grains possess the smallest sizes. It is established also that application of cutting discs with radial orientation of abrasive grains in comparison with ordinary tools allows to reduce temperature in a cutting zone by 20-30 °C and to reduce the size of zones of thermal influence.
Investigation of Composite Deflocculant Influence on the Properties of the Refractory Castable with Chamotte Aggregate
Authors: Pundienė Ina , Demidova-Buiziniene Irina , Volochko A.
Published: October 2014

The influence of different types of deflocculants, PCE and sodium tripolyphosphate, on the rheological properties of the cement matrix was studied. It was established that composite deflocculant consisting of sodium tripolyphosphate and PCE Castament FS 20 provides the best rheological properties of the cement matrix and affects the composition of the hydration products. During the drying process of matrix with composite deflocculants mineral stratlingite additionally formed, which contributes to increment of strength properties. Comparative studies of refractory castable strength properties with chamotte aggregate showed that the compressive strength of concrete samples with composite deflocculants after hardening and after drying and burning is almost two times higher than the strength of samples with separate deflocculants.
Improving the Efficiency of Strip Cladding by the Control of Electrode Metal Transfer
Authors: Ivanov Vitaliy , Lavrova Elena
Published: October 2014

The technology and equipment for pulsed feed of strip electrode for electric arc cladding was developed. The influence of transfer control parameters on the electrode melting process was investigated. Found that pulsing feed of the strip electrode provides optimum heat input into the base metal, stable penetration without defects of the bead formation.
Laser-Microplasma Reactive Powder Spraying of Titanium Coatings with Nitride Phases
Authors: Kuzmych-Ianchuk Ie.K. , Borisov Yu.S. , Bernatskyy A.V.
Published: October 2014

One of the actual problems of modern surface engineering is to improve the wear and corrosion resistance of structural elements made ​​of titanium and titanium alloys, which owing to a number of unique characteristics are becoming more widely used in industries such as aerospace, chemical engineering, medicine and many others. Promising way to improve the tribological characteristics as well as corrosion resistance in aggressive environments of such materials is the formation of titanium nitride layers on the surface. Titanium nitride is characterized by high hardness (up to 20000 MPa), wear resistance, chemical resistance and high refractory properties [1], which allows to significantly expand applicability and product lifetime of these materials.
Influence of Conditions of Copper Wires Electric Explosion on Dispersity of Produced Nanopowders
Authors: Zhuravkov S.P. , Pustovalov A.V. , Kuznetsov M.A. , Zhantuarov S.R.
Published: October 2014

The article presents the results of a study concerning the influence of conditions of copper wires electric explosion on a dispersity of produced nanopowders. It was shown that the energy introduced into the wire being increased, the specific surface area grows and the size of produced nanopowders decreases.
Effect of Welding Position and Gap between Samples on Hybrid Laser-Arc Welding Efficiency
Authors: Tsibulskiy I. , Kuznetsov M. , Akhmetov A.
Published: October 2014

Influence of welding position and gap between samples on efficiency of hybrid laser-arc welding (HLAW), geometry of melting zone and alloys of filler material depth penetration are presented in the publication. Studies were indicated that maximal efficiency (thermodynamic efficiency about 43%) was achieved at hybrid laser-arc welding in PG welding position. Efficiency at PA and PC welding positions were 31.8% and 33.8% accordingly. Researches were indicated that melting zone, depth penetration alloys of filler materials and efficiency of HLAW increase with increasing gap. Experiments were indicated, that depth penetrate of filler material alloys is 20 mm (gap 1 mm). Proportion of filler material in a top part of metal seam is 50%, in bottom part of metal seam is about 5%.
Solid Components of Welding Fumes as a Synthetic Composites Filler
Authors: Grishagin V.M. , Safronova A.B.
Published: October 2014

Solid ingredients of welding fumes can find application in manufacturing different components of welding equipment. Thus welding nozzles applied for gas-shielded welding have ceramic metal plugs which isolate welding torch nozzle from current conducting parts. TCCA as well as metallurgical sludge are applied in construction materials production, road construction, as coloring ingredients for decoration materials, in agriculture (soil deoxidation, mineral fertilizes).
Study of Crack Resistance of Layers Applied by Laser Surface Cladding
Authors: Namazov S.N. , Rzayev E.D. , Jivishov V.F.
Published: October 2014

The paper describes the crack initiation in the layers which were applied by laser surface cladding. The paper investigates the influence of the chemical composition of layer materials and welding technology on the tendency of the crack formation. Proposed method can dramatically reduce the formation of surface cracks in the applied layers.
Capacity Calculation of Hydraulic Motors in Geokhod Systems for Justification of Energy-Power Block Parameters
Authors: Blashchuk M.Yu. , Kazantsev Anton A. , Chernukhin R.V.
Published: October 2014

The paper provides description of an approach to calculate main parameters of energy-power block of geokhod computing the hydraulic motor capacity of each end user. The paper determines the effect of geokhod dimensions on capacity consumption by main geokhod systems. The shares of capacity consumed in each geokhod system are calculated.
Influence of Geometrics of Synchronization Devices of Fluid Coupling on Loading Capability
Authors: Koperchuk Аlexandr V. , Murin Аlexey V.
Published: October 2014

The paper presents the results of theoretical and experimental research in revealing the influence of form and geometrics of internal chamber of synchronization devices with steel-balls of fluid coupling on loading capability.
Acoustic and Elastic Properties of Cu3Au Alloy between 4.2...300 К
Authors: Tesleva Elena P. , Belkova Tatiana
Published: October 2014

The article studies the elastic properties of anisotropy and interatomic anharmonicity in a two-component Cu3Au alloy with positional order-disorder within the temperature interval of 4.2 К and 300 К. It provides calculations on velocities of purely transverse and longitudinal elastic waves, elastic moduli (Young’s, shear, adiabatic bulk moduli) and Poisson’s ratios based on the stiffness constants сij(T) of the crystal. Sound velocity values were employed for determining the temperature changes of Grüneisen parameter along the crystallographic directions [100], [110] and [111].
Influence of Rake Angle Tool on Plastic Deformation in Chip Formation when Cutting
Authors: Filippov A.V. , Gorbatenko V.V.
Published: October 2014

The article considers experimental studies of plastic deformation in the area of chip formation when cutting copper M1. According to the results of the research the value of shear deformation was calculated. The change of a rake angle tool γ leads to the change in the process of plastic deformation in the area of chip formation. It was found out that the maximum degree of shear deformation takes place in the contact area of tool tip and deformable sample.
State Regulation of Investment Activities in Russian Mechanical Engineering
Authors: Alekseev A.N.
Published: October 2014

The article is devoted to state regulation of investment activities in Russian mechanical engineering. The author analyzes the dynamics of performance indicators and the role of investment in their increase. The article defines main areas of state regulation of investment processes and validates practical measures to raise the efficiency of investment activities based on the improvement of the investment climate and increase the investment attractiveness of industries for different groups of investors.
A Model of Decision Support on Migration of Enterprise IT-Applications in the Cloud Environment
Authors: Razumnikov S.V. , Zakharova Alexandra A. , Kremneva M.S.
Published: October 2014

When using cloud systems there is always a problem of data safety, data availability and a possibility of malicious acts, hampering computational processes. However, evaluating the risks of introducing cloud applications is not the only aspect influencing the decision to move enterprise applications to the cloud. The present paper suggests a model of decision support for deciding to move enterprise applications to the cloud environment based on the Analytic Hierarchy Process (AHP). The model allows estimating a set of enterprise IT applications and choose the applications for migration to the cloud, based on specific business requirements, technological strategy and willingness to risk.
Developing the Model for Assessing the Competitiveness of Innovative Engineering Products
Authors: Tceplit Anna , Grigoreva Antonina , Osipov Yuriy
Published: October 2014

The authors suggest the models for assessing the competitiveness of innovative engineering products (IEP): a model for forecasting the consumer’s preferences for IEP; a model for calculating fuzzy sets of alternatives of various competitiveness degrees at the early stages of research; integrated model for IEP competitiveness assessment with consideration to the stages of production, marketing and operation, the model for the rating assessment of alternatives. The paper considers the model for forming an expert committee involving fuzzy inference. The interrelation of models is shown with consideration to the life cycle of innovations.
Repair of a Gas Turbine Blade Tip by Impulse Laser Build-Up Welding
Authors: Shitarev I.L. , Smelov V.G. , Sotov A.V.
Published: October 2014

This article deals with the repair process of a gas turbine blade tip by impulse laser build-up welding, optimization algorithm for the technological process is proposed and macro-and micrograph of the investigated surface was made.
Belt Damage Aspect to Impact Loading
Authors: Ambriško Ľubomír , Taraba Vladimír , Szabo Stanislav , Leco Martin
Published: October 2014

This paper presents the results of rubber products testing (rubber conveyor belt type P 2000/4, 8+4) with regard to their quality in order to establish the limit value of impact load, i.e. establish the maximum breakdown resistance. Outputs of measurements are in addition to the impact load also duration of impact, size of tension load and determination the effect of the support system for conveyor belts breakdown resistance. Using Design of Experiments method are identified factors that significantly affect the value of the impact load.
Conveyor New Concept for Parcel Logistics in Air Transport
Authors: Voštová Věra , Jerabek Karel , Němec Vladimír
Published: October 2014

Parcel logistics is characterized by transport performance steep increase and current performance reachs 20 000 parcels an hour. In the company DHL anticipates increase in 50 000 parcels an hour. It is one possibility how manage it. They are transport systems with new conception of functional structure. The contribution introduces groundbreaking concept of conveyor – peristaltical conveyor. It was produced in Frauenhofer-Institut IFF Magdeburg and Institute of Logistics and Material Handling Systems Otto-von-Guericke-University Magdeburg.
Effect of Strength Parameters and the Structure of Steel Cord Conveyor Belts on Belt Puncture Resistance
Authors: Komander Henryk , Bajda Miroslaw , Komander Grzegorz , Paszkowska Gabriela
Published: October 2014

Conveyor belts transporting rock material are getting worn out mainly as a consequence of punctures and cuts caused by impacts of rock lumps in the belt loading zone. To enhance the operational durability of conveyor belts multidirectional actions intended to lower the dynamic load of belts, to increase the belt impact resistance and to monitor the belt condition are undertaken. Some significant improvements can be achieved by decreasing the material fall height, by implementation of transported material slides in transfer chutes and shock absorbing belt supports as well as by reducing rock lump sizes. To avoid extensive wear belt monitoring methods are being developed, so that belt defect numbers, sizes, and locations can be identified [1]. Implementation of monitoring prevents sudden belt tear and enables rational belt management by repairing and regenerating belts in the optimum time. Laboratory research programmes aim at identifying the relation of the dynamic stress and the belt fatigue strength [2,3]. Investigations of the effect of strength parameters and the structure of steel cord conveyor belts on their puncture resistance are carried out since many years [4,5,6,7]. High puncture resistance of a conveyor belt is one of the main assessment criteria of its operational durability. Research work on the impact of belt top cover thickness, cover rubber properties and type of belt crosswise reinforcements on the belt puncture resistance was undertaken in the Laboratory of Belt Transportation (LBT) of Wroclaw University of Technology [8].
Mathematical Modelling of the Process of Conveyor Belt Damage Caused by the Impact Stress
Authors: Taraba Vladimír , Marasová Daniela , Kubala Dušan , Semjon Vladimír
Published: October 2014

The article presents the results of the mathematical modelling of the strain and deformation conditions in the steel-cord conveyor belt of the ST 2000 and ST 2500 types, applying the Finite Element Method. The output of the model is identification of the maximum magnitude of the activated dynamic force in the conveyor belt on the basis of the analysis of vertical shifts of the loaded point, vertical strains in the area of supporting rollers, and the maximum principal strains.
Reverse Material Flow of Worn-Out Conveyor Belts
Authors: Husáková Nikoleta , Honus Stanislav
Published: October 2014

Options for further use of worn-out conveyor belts were analysed and examined within the frame of research about options of reverse logistics. Reverse logistics has importance because one of the most important elements of reverse logistics is presented by wastes. By the research it is examined the reverse logistics network system for wastes. The article presents partial results of the aforesaid research in the field of reverse material flow of rubber wastes, especially results of theoretical knowledge of the current state of reverse material flow of rubber wastes in Slovak republic and re-processing of rubber wastes.
Selection of the Optimal Alternative of the Deposit Opening Applying the Decision-Making Process
Authors: Marasová Daniela , Lukáč Stanislav , Ambriško Ľubomír , Cehlár Michal
Published: October 2014

The reason for opening deeper mining horizon is to preserve the volume of extraction, a smooth transition to a new horizon with the intention of mining state of existing stocks. In the proposal of opening will be maintain the current direction of transport (extraction of mineral, haulage of materials, lower) through bank to the existing plant equipment. Alternative proposals for solutions of opening new horizon will be limited to the range of main opening workings (hoisting shaft), including relevant hoisting equipment and objects immediately fasten on it. Other deeper horizon equipment outside the pumping station (filling station, transformer station, depot, level gangway, etc.) will be practically independent on the horizon and will be the same essentially in all cases. The proposal will be considered three alternatives: deepening of a shaft, sinking blind shaft and dip road. The best alternative will be recommended on the basis of the decision-making process.
Test Equipment for Analysis of Samples Rubber – Textile Conveyor Belts by Help Industrial Metrotomographs
Authors: Michalik Peter , Molnar Vieroslav
Published: October 2014

The test equipment of samples for analysis of rubber-textile conveyor belts is a device designed to create tension and tracking the deformation in different cross sections of conveyor belts in one axis X. This construction is designed tensioning device, which allows the development of automatic tensioning force in one axis X-tensioning force F is exerted screw the nut with a torque wrench and a controlled strain-gauge sensor. Measured sample-textile conveyor belt is clamped in two adjustable clamping jaws ribbed belts for different thicknesses. Ribbed clamping jaws on one side of the tensioning device is attached to the frame and on the other hand are attached to the runner associated with the movable tensioning screw.
The Dynamics of Impacts Tools the Loading Boom Bucket Wheel Excavators
Authors: Gondek Horst , Neruda Jiří , Pokorný Jiří
Published: October 2014

One of the major problems of long-distance belt conveyor technology, and not only in the North Bohemian mines, are impacts of rock blocks on the belts which increases the belts wear and reduces their service life. Therefore, in this paper there are widely discussed the rock impacts dynamics, a new type of device - the impact rods intended for significant reducing the number of punctures in the conveyor belts and thus for prolongation of their service life and modeling of the proposed devices. Application of the impact rods is estimated in the impact stands of the systems of conveyors removing the coal extracted by the bucket wheel excavator KU 300.
Determination of Elastic Modulus of Steel Wire Ropes for Computer Simulation
Authors: Boroška Ján , Pauliková Alena , Ivančo Vladimír
Published: October 2014

Modulus of elasticity of steel wire rope (elastic modulus) is a characteristic value, which is important not only for users of the steel rope, but also for designers of machines and machinery that are equipped with the steel wire rope. Values of the elastic modulus depends predominately on the elastic modulus of the material, which the rope is manufactured from as well as it depends on the various other factors. The most important influencing factors are as follows: rope construction, type of core, angle and way of wire stranding, angle and way of rope lay as well as kind of lubricant. The real value of the elastic modulus has also impact on prolongation of the steel wire rope and on intensity of its dynamical loading. The rope elastic modulus value can be determined by means of the various methods. There are analysed in this article such methods for determination of the rope elastic modulus, which can be applied for a computer simulation.
The Use of Sophisticated Materials in the Construction of an Ultra-Light Trailer
Authors: Kráľ Ján , Cosmin-Roszkos Š. , Kráľ Ján , Rjabušin Adrián , Harsányi Lorant , Madáč Kamil , Melko Jaroslav
Published: October 2014

This paper aims to study ultra-light materials, which will replace the conventional materials used in the production of trailers. Conventional materials used for the production of trailer frames are: galvanized steel or steel with untreated surface and various coatings. In addition to high strength, steel is characterized by a high specific weight, which significantly increases the weight of the trailer and reduces the permissible load. Therefore it is necessary to look for other materials that have a lower specific weight, but in the same time they meet strength requirements. The designed boat trailer has 25% less weight than the lightest boat trailer available on the European market.
Vibration Diagnostics of Conveyor’s Rolling Bearings
Authors: Libor József , Vas Ferenc , Czifra György
Published: October 2014

For the factories it is essential, that the equipment and machines were available for the production process continuously. This is why we have to deal with the maintenance of the engines including diagnostics of machines and their main units. This analysis is dealing with the vibration diagnostics of conveyor’s rolling bearings. The test measurements were taken at a maize seed production factory. After analyzing the technology of the factory we have assigned which conveyors are the most important in the process of production. The measurements were taken. Based on the results of the analysis we have suggested the implementing of the vibration diagnostics.
Material Assessment of the Causes of Degradation of the Hoist Engine Bearing
Authors: Jonšta Zdenĕk , Gabčová Miriam , Kostiuková Gabriela , Vlčková Irena , Folta Zdeněk
Published: October 2014

The paper presents the results of material analysis of material of the main bearing of the underground mine hoisting engine, which degraded after a time shorter than the guaranteed service life. The material analysis was performed using metallographic and electron microscope analyses. Cutting of the samples was made by water jet in order to avoid affecting of the structure.
Effect of Operational Condition Changes on the Durability of the Rope for Pusher of Circular Wagon Tipper
Authors: Kuľka Jozef , Mantič Martin
Published: October 2014

Article discusses the pusher wagons in transhipment complex. In terms of the reliability of this device appears to be the weakest link in the transhipment of bulk substrates operated rotary tilter because of its design causes increased wear of the rope. The mode of handling the rope through the properties is an ideal solution for transport of the wagons, which led to finding ways to extend its life. This contribution is proposing a design method for a possible modifications of the pusher with an expected minimum costs and there are calculated the load characteristics of the rope before and after adjustment of the device.
Analysis of Operation of Carrying-Hauling Ropes of Monocable Aerial Ropeways in Poland
Authors: Rokita Tomasz , Oleksy Wacław
Published: October 2014

The article presents the basic technical requirements for carrying-hauling ropes for monocable aerial ropeways contained in the Directive 2000/9/EC of the New Approach of March 20th 2000 on cableway installations designed to carry passengers and in European Standards harmonized with it. These requirements apply to materials used for ropes, methods of manufacturing of wires and ropes, physical parameters, mechanical properties, testing methods and rope discarding criteria. The article summarizes the different types of loads in carrying-hauling ropes for monocable aerial ropeways and their impact on the operation of the cableways. It also touches the subject of the properties of carrying-hauling rope constructions with equal lay and compacted strands used in ropeways in Poland in the last two decades with particular emphasis on the structure of cores made of plastics. An analysis and assessment of the rope operation has been carried out in the last part of the article. This analysis considers factors such as the rope construction, the method of carriers gripping, lay direction of rope related to the direction of ropeway movement, rope elongation depending on the type of core and the associated rope shortening and rope fatigue life.
Static and Dynamic Testing Study on Mechanical Behavior of Longtan Bridge
Authors: Fu De Cheng , Wen Yu Hui , Wang Lei
Published: October 2014

To assess the carrying capacity and reliability of the-Longtan Bridge, applied static load in the middle of the bridge step by step, then collected strain and deflection data of the beam. In order to understand the working principle of a bridge under dynamic loads, dynamic load test - Vehicle traffic test and fluctuation test t was performed, and vibration frequency data was collected. This paper described the basic principles of the bridge static and dynamic tests, and introduced the program of the experiment. Based on the test data, the static and dynamic mechanism of the bridge was discussed, the conclusion provides the basis for further study of bridge mechanism of the mechanical.
Prediction of Cutting-Direction Burr Height in Micro-Milling
Authors: Yang Cheng , Huang J. , Yue W. , Shi G.F. , Wang Gui Cheng
Published: October 2014

Due to the high precision and strong molding capacity, micro-milling plays an important role in the field of micro-machining. The components machined in micro-machining is smaller than conventional components, and sometimes the generated burrs are as large as the feature size of components, so the study of micro burr control is very important. In the reseach, cutting-direction burrs are based on the traditional milling characteristics, also combined with the characteristics of micro-milling. The experimental data verify the correctness of the model well, so it provides theoretical guidance for the burrs control in micro-milling.
Impact Damage Resistance of Thin-Core Sandwich Structures Subjected to Low-Velocity Impact
Authors: Wang Kai Lun , Guan Zhi Dong , Guo Jun , Li Zeng Shan
Published: October 2014

This paper aims at evaluating the damage resistance of thin core sandwich structures, composed of aramid paper honeycomb core and carbon/ epoxy laminates face-sheets subjected to low velocity impact. The impact tests are performed using the instrumented impact-testing machine and resulting impact damages are inspected by Ultrasonic C-scan. In order to study the failure process of the core, which is important in the damage of the structures, flatwise compression test was carried out. Four parameters have been analyzed as follows: maximum load, total energy absorbed during impact, impact dent depth, and impact damage area. Nearly all impact force histories of panels have “twin peaks”, but the second peak of the 3mm-core structure is much larger than the first, which is quite different from others, when impact energy reached 5J, which were caused by the thickness of the core. Impact damages of thin-core sandwich structures are mainly delamination in the face-sheet and core crushing at low energy, and fiber breakage at relatively high energy. The damage processes of different groups of structures are essentially different and the impact resistance of the sandwich structure is greatly influenced by the face-sheet and core thickness.
Research on High Voltage Electromagnetic Electrostatic Spinning Machine Electric Field Analysis
Authors: Yu Yang Tao , Zhao Peng Cheng , Wang Xin , Tian Ye
Published: October 2014

The main approach to obtain nanomaterial is nanospinning technology at present. Due to the inherent characteristics of nanomaterial itself, which are easily affected by the electric field force effect of spinning. And for the spinning machine nozzle electric field is relatively complex, so nanospinning products at present, is easily affected by the electric field force and dissipated. So, the nanospinning collection efficiency is low. This paper adopts an oval enhanced electrostatic mechanism, method of using additional electric field to improve the balance obtained nanomaterial collection rate. And the construct high voltage electrostatic spinning machine virtual prototype,complete the analysis of the improved method of static electric field. The analysis results indicate that the electric field can effectively improve the collection rate of nanospinning. Through the study of the additional electric field strength further size on the electric field force and the ellipse, can more effectively improve the collection rate of nanospinning products.
Structure Optimum Design Based on Maintenance and Lifting Equipment for Wind Turbine
Authors: Sun Jia , Zhang Ke , Wu Yu Hou
Published: October 2014

To meet the urgent demand of maintenance and lifting equipment for wind turbine, combined with designation demand, two kinds of primary structure of the maintenance and lifting equipment has been proposed, analyzed and compared. By means of the Solid Works software the initial design on the two kind of the machine, the self-climbing crane and the trailed hoisting platform, have been conducted, the static analysis has been performed based on the mechanics model, and the advantages and disadvantages of these methods have been pointed out and compared in the paper. Compared with the self-climbing crane, the mechanical structure of the trailed hoisting platform is simpler, the control system presented more reliable, simple, easier realized etc, and the cost is lower. The self-climbing crane is high-automatic, but the design of crane high in the free degree and high in difficulty, and the climbing force focused on the wind turbine tower is too large. Conclusion The trailed hoisting platform is determined as the main design method to design the maintenance and lifting equipment for wind turbine.
Analysis of Sealing Properties on a Bolted Joint Based on Probability
Authors: Frydrýšek Karel , Maťas Martin , Novák Pavol
Published: October 2014

This article deals with the study of the sealing properties on a bolted joint on a hydrostatic transmission. The main idea of this study is aimed at the probability assessment of fluid leakage due to the mechanics that play a significant role in the sealing properties. The study was performed via numerical analyses by using a FEM software package, ANSYS Workbench. The main focus when evaluating the results is aimed at the observation of the contact pressure and contact gap on the bolted joint. In this study two variables on the bolted joint, which can affect the sealing properties were taken into account, the torque applied through the bolts and the surface finish under the heads of the bolts.
The Optimum Design for Clamping Mechanism of Wind Power Maintenance Lifting Platform
Authors: Zhang Ke , Tong Sheng Hao , Tian Ye , Sun Jia
Published: October 2014

Using ProE software establish the digital prototype of wind power maintenance lifting platform and the clamping mechanism, import the clamping mechanism into ANSYS to analysis the static strength. Select the forced major important parts in clamping mechanism,hydraulic cylinder connecting pin board,use the Design Explorer modules in ANSYS Workbench introducing the response curves to do the optimum design, set the thickness of hydraulic cylinder connecting pin board and the work position of the hydraulic cylinder for the input parameters variable,with pin board by stress as output parameter variable, from nine groups of data, selecting the smallest stress group as the new design, analysis and calculate again. Results show that by stress of the optimized clamping mechanism is obviously improved, and the structure of whole clamping mechanism more reasonable and compact.
Finite Element Analysis and Lightweight Design of Crusher Flywheel
Authors: Yang Chun Lan , Huang Da  Ming , Cheng Fa Long
Published: October 2014

Traditional jaw crusher has the problems of unreasonable structure, heavy weight, low utilization of material and high cost. This paper chooses the flywheel which has great influence on the total weight as the research object. Finite element method are used to anlysis stress and displacement distribution under the action of maximum crushing force. It shows weak link and surplus position of primary structure. Use the parametric design language APDL to establish and analyze finite element model, based on crusher structural features. Make lightweight design meeting the demands of intensity, stiffness and moment of inertia. The result indicates that modified flywheel is less than the original one by 5%, makes structure more reasonable and stress distribution more even.
Turning of Micro-Structured Surfaces Based on a Fast Tool Servo System
Authors: Wang Xiao Hui , Ding Zhi , Ma Yu Zhen
Published: October 2014

A fast tool servo system is developed for the fabrication of micro-structured surface on a diamond turning machine. The fast tool servo (FTS) system in this investigation employs a piezoelectric actuator to actuate the diamond tool and a capacitance probe as the feed back sensor. To compensate the inherent nonlinear hysteresis behavior of the piezoelectric actuator, Proportional Integral (PI) closed loop control with a feed-forward predictor is implemented. The result of closed loop experiment in FTS demonstrates that the tracking error has been reduced to a level of less than 150nm. Actual experiment of fabricating the sinusoidal grid surface was performed on an ultra-precision diamond turning machine designed by Center of Precision Engineering of HIT. The fabrication of a sinusoidal grid surface has indicated the effectiveness of the fabrication system.
Three-Dimensional Finite Element Coupled Analysis of a Diesel Engine Piston
Authors: Liu Qi , Ouyang Guang Yao , Zhang Ping
Published: October 2014

The paper analyzed the temperature field and the thermal stress field of a diesel engine piston with finite element analysis software ANASYS, then used the thermal mechanism indirect coupled method, researched the coupled stress field of piston. The result indicated that the point of the highest temperature located on the middle of firebox which under the dangerous temperature of the material; under thermal stress effect, the max displacement of the piston did not exceed the clearance between piston and cylinder liner, but the non-roundness at the third ring reached 0.08mm, which had some influence on the pressurize and lubricate of piston; under thermal mechanism coupled effect, the point of max stress located on the interface of the seat of the pin and the pin hole, so as the top on the pin hole and inner on the seat of pin, so it was recommended to set rib between cervix and the seat of pin of piston to enhance the practical carrying capacity of the seat of the pin.
Based on the Finite Element Analysis of Rescue Vehicles Modular Virtual Prototype Research
Authors: Yuan Heng Yi , Cao Shi Da
Published: October 2014

In disaster rescue vehicles use ANSYS finite element analysis software, establishes the finite element calculation model for car key components, the static stress and strain analysis, get key components under different conditions of displacement and stress distribution nephogram, find out the bearing connection support frame and dangerous parts of the suspension control arm The bearing connection support frame and suspension control arm for modal analysis, get the bearing connection support frame and suspension control arm each order natural frequencies and natural modes, avoiding resonance and increase the weighing accuracy calculation and analysis for automobile bearing connection support frame and suspension control arm provides reference basis for the retrofit design.
Flutter Optimized Design for a Aircraft Horizontal Tail Base on Optimus Software
Authors: Zhang Da Qian , Tan Xiao Dong , Zhang Zi Lei , Fu Xin Ping
Published: October 2014

Based on the similarity theory, the horizontal tail scale model is designed and manufactured. Subsonic doublet lattice method is used to calculate unsteady aerodynamics, V-g method is used to solve the flutter determinant. Optimus software is used to optimize the thickness of the skin. The constraint condition is the frequency, MAC value and flexibility, and the objective function is flutter dynamic pressure. Flutter velocity of horizontal tail model optimized decreased 6%,and flutter frequency increased greatly. Horizontal tail scale model was test in wind tunnel. The finite element calculate results was very close with wind tunnel results, which verify the correctness of the finite element model and optimization models.
The Mechanics Analysis of the Perforated Casing on Reservoir Sanding Finite Tunneling Section
Authors: Pan Huan Huan , Dou Yi Hua , Cao Yin Ping
Published: October 2014

Perforated casing eyehole stress concentration and sanding and compaction are the main reasons of casing abnormal damage during the exploitation. To understand the impact of reservoir sanding on perforated casing strength, fracture mechanics is applied to analyze the stress concentration of casing caused by perforating, while rock mechanics is applied to analyze the load of perforated casing of reservoir sanding limited bailed section, and on this basis, the impact of reservoir sanding on perforated casing strength is analyzed by the three-dimensional finite element model building. The analysis results show that the finite element solution and the theoretical solution of stresses of the perforated casing of reservoir sanding limited bailed section can be verified with each other. Under the same condition, the theoretical solution is bigger than the finite element solution, this is mainly due to the perforated casing additional bending stress effect is considered in the fracture mechanics theoretical analysis. It is conservative to estimate the perforated casing safety by finite element solution, while the theoretical solution is economical.
The Preparation of N-Heptyl Pyridine Tetrafluoroborate
Authors: Xu Ting Ting , Zhang Cheng Cheng , Tian Peng , Duan Ji Dong , Shen Qing Wen
Published: October 2014

The halogenated hydrocarbon and pyridine are used in the synthesis of room temperature ionic liquid intermediates bromided N-heptyl pyridine HEPB, and the nuclear magnetic resonance instrument and the intermediate infrared spectrometer are used in chemical structure characterization, so it is determined that the synthesis is the room temperature ionic intermediates HEPB. We use differential scanning calorimetric method for the determination of HEPB melting point and enthalpy change. We use the double decomposition reaction of HEPB and NaBF4in acetone for the synthesis of HEP-BF4ionic liquids. We use infrared spectrometer for the structure characterization, it is proved that we have gotten HEP-BF4room temperature ionic liquids. Solvent polarity and acid alkali both will have an influence on ultraviolet spectrum diagram displacement of room temperature ionic liquid, so in the research of ultraviolet spectrum diagram of ionic liquids and other solvent mixed solution, it is necessary to indicate which solvent is used.
Determination of 1-methyl-3-butyl Imidazole Nitrate in Ethanol
Authors: Yang Qi
Published: October 2014

1-methyl-3-butyl Imidazole chloride is synthesized by 1–methyl imidazole and chlorinated n-butane. BMINO3ionic liquid is synthesized by BMIC and NaNO3in the acetone. The structure is characterized by infrared spectrometer. UV-spectrum curve is doned by scanning ionic liquid in 200~400nm wavelength range. The ionic liquid used in the experiment has obvious absorption in 200~400nm wavelength range, and the maximum absorption wavelength which is determined by ultraviolet spectrometry method is 228nm. Linear regression equation is y =0.02317x+0.06483. Correlation coefficient is 0.9995, which is high related degree between the absorbance value and the solution concentration. The recovery rate is between 99.8%~102%.