Arhive zilnice: august 21, 2015


28-83 INFLUENŢA AGENŢILOR DE SPĂLARE ASUPRA ALIAJELOR DE ALUMINIU

WASHING AGENT INFLUENCE ON ALUMINUM ALLOYS
This paper is a study layer of aluminium and aluminium alloys, subjected to the action of external self-detergents, and their behaviour in processes of wear or fatigue. The data obtained are useful in the analysis of structural changes that appear and develop during the destructive processes mentioned. The study of structural changes can be made by various non-destructive techniques, which occupied an important place of composition applied to the alloys washing agents, working environment and temperature.
Keywords: aluminium alloy, car wheels, washing agents
Cuvinte cheie: aliaje de aluminiu, jante auto, agenți de spălare

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28-82 STUDII ŞI CERCETĂRI PRIVIND POLUAREA FONICĂ ÎN MEDIUL INDUSTRIAL

RESEARCH AND DEVELOPMENTS ON NOISE
POLLUATION IN INDUSTRIAL ENVIRONMENTS
The document shows the importance of study and research of noise pollution phenomenon, which is an internationally and nationally current issue, because it affects people and causes so-called occupational diseases. But we have to consider that the main source of noise pollution is industrial environment.
Keywords: sound pollution, noise impacts, industrial environment
Cuvinte cheie: poluare sonorǎ, impactul zgomotului, mediul industrial

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28-81 STUDII ŞI CERCETĂRI ASUPRA REDUCERII POLUĂRII SONORE DE CĂTRE PLANTE LA LOCUL DE MUNCĂ

STUDIES AND RESEARCHES ON NOISE REDUCTION
BY PLANTS AT WORKPLACE
This paper contains studies about how plants reduce noise indoors and which are the involved factors in this process. Also is giving information about the variation of acoustic absorption coefficient depending on plants species.
Keywords: pollution sonorǎ, absorption plants – acoustic absorbers
Cuvinte cheie: poluare sonorǎ, absorbție, plante – absorbanţi acustici

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28-80 STABILIREA POLUĂRII SONORE ÎN MUNICIPIUL ORADEA PRIN TEHNICA FUZZY

ESTABLISHING OF NOISE POLLUTION IN THE ORADEA MUNICIPALITY THROUGH FUZZY TECHNIQUE
This paper contains an application for the noise pollution study based on the fuzzy technique, applied to the Oradea municiplaity. This method was not at all used until this moment for the noise study from the another researchers, but this is a very good method because it is a non invasive method end can be applied with succeful for the noise pollution study. This aspect will be demonstrate in this paper.
Keywords: pollution sonorǎ, fuzzy technique, method we invasive
Cuvinte cheie: poluare sonorǎ, tehnica fuzzy, metoda neinvazivǎ

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28-79 ASPECTE PRIVIND CALITATEA AERULUI DIN MEDIUL URBAN

ASPECTS OF URBAN AIR QUALITY Air pollution can cause and aggravate respiratory diseases, cardiovascular damage forests, increase soil acidity and water can affect crops and cause corrosion of buildings. We can see that many air pollutants that contribute to climate change and climate change in turn will affect air quality in the future. The concentration of aerosol particles in the atmosphere is an important parameter for assessing air quality. For example, variations in the concentration of the aerosol particles will differ greatly in urban areas to rural areas or industrial areas to their neigh boring areas. The paper presents the results of measurements on powders bet on suspension of Cluj-Napoca city has bet on different areas.
Keywords: air quality, aerosol particles, air pollution

Cuvinte cheie: calitatea aerului, particule ȋn suspensie, poluarea aerului

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28-78 CARACTERIZAREA DIN PUNCT DE VEDERE AL PROTECȚIEI MEDIULUI A NĂMOLURILOR ROŞII REZULTATE DIN PRODUCEREA ALUMINEI

RED IMPACT FROM SLUDGE PROCESS FOR THE
PRODUCTION OF ENVIRONMENTAL ALUMINEI Red sludge is a waste resulting from the Bayer process of refining bauxite to produce alumina. Red sludge is a waste strongly alkaline due to NaOH. Its composition depends on a number of factors but essentially the composition of the bauxite. Everything depends on the composition and quantity of bauxite red mud result: between 0.33 to 2 tons of red mud per tons of alumina produced or 0.4-2 tons of red mud per tons of alumina produced. The main environmental issue out of the sheer amount of red sludge produced is alkalinity. In paper presents analysis of the composition of this material particularly as regards the possibility of environmental pollution. Another factor that is useful to know in terms of environmental impact, especially in case of accidents knows the amount of acid required to bring the pH to a particular environmental acceptable values.

Keywords: red sludge, bauxite, waste alkaline

Cuvinte cheie: nămol roşu, bauxită, deşeu alcalin

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28-77 UTILIZAREA NANOPARTICULELOR ÎN MANAGEMENTUL APEI

NANOPARTICLES USE IN WATER MANAGEMENT
Applications of nanoparticles in water management can provide new values compared with conventional methods applied worldwide in drinking water treatment processes and wastewater treatment. An important role in the development of new technologies provides nanometer-scale materials that exhibit completely different from the same material of macroscopic dimensions. The purpose of this paper is to briefly present not only the importance of implementing nanotechnology in this area but also some of the most popular methods of synthesis and characterization of these nanomaterials.
Keywords: nanotechnology, nanoparticles, water management, eutrophication, pollutant
Cuvinte cheie: nanotehnologie, nanoparticule, managementul apei, eutrofizare, poluant

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28-76 ÎNDEPĂRTAREA IONULUI FOSFAT DIN APELE UZATE PRIN METODE FIZICO-CHIMICE

REMOVAL OF PHOSPHATE ION FROM WASTE WATERS WITHPHISICAL AND CHEMICAL METHODS
In these paper comparative studies we made for the removal of phosphate ions from wastewaters using two different methods. First method is precipitation-coagulation using ferric sulphate or ferric chloride like coagulation reagent and the second method is electroflotocoagulation with iron disposal anode.
Keywords: phosphat ions, waste water, precipitation-coagulation, electroflotocoagulation
Cuvinte cheie: ioni fosfat, ape uzate, precipitare-coagulare, electroflotocoagulare

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28-75 STUDII PRIVIND EPURAREA APELOR UZATE CU CONŢINUT DE ULEIURI VEGETALE PRIN PROCESUL DE ELECTROFLOTOCOAGULARE

STUDIES REGARDING TREATMENT OF WASTEWATER WITH VEGETAL OILS CONTENT BY ELECTROFLOTOCOAGULATION PROCESS
Wastewater treatment means the combination of measures and processes by which the impurities of chemical or microbiological nature contained in wastewater are reduced under certain limits, so these waters will not cause any harm to the receiver which is discharged and not to endanger its water use. One of the advanced methods for this removal is electroflotocoagulation. In this paper we studied the optimal condition and efficiency of electrocoagulation process in the removal of vegetal oils from waste waters. The studied conditions are intensity of electrolysis current, electrolysis time and dynamic water flow rate through electrolysis cell.
Keywords: vegetal oils, wastewater, electrocoagulation
Cuvinte cheie: ulei vegetal, ape uzate, electrocoagulare

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28-74 METODE DE EFICIENTIZARE A STAȚIILOR DE EPURARE. UTILIZAREA BIOGAZULUI OBȚINUT ÎN URMA FERMENTĂRII NĂMOLULUI ÎN CENTRALE TERMICE (STUDIU DE CAZ: SEAU CONSTANȚA NORD)

METHODS TO STREAMLINE THE ENERGY CONSUMPTION AT THE WASTEWATER TREATMENT PLANTS. USING BIOGAS OBTAINED FROM SLUDGE FERMENTATION IN THERMAL PLANTS (CASE STUDY: CONSTANTA NORD WWTP)
This paper aims to present a simple way to evaluate the biogas production from the sludge resulting from the wastewater treatment process. Attention is given to three topics: the wastewater sludge fermentation and the evaluation of the biogas production with BioWatts software, but also to providing a general view of the thermal plant, the flow of the technological process and the equipment’s required to store and use the biogas as the main fuel for the thermal plant.
Keywords: sewage, waste water, biogas, energy efficiency
Cuvinte cheie: epurare, ape uzate, biogaz, eficiența energetică

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28-73 ÎNGLOBAREA DEŞEURILOR PE BAZĂ DE PLUMB ÎN STICLE TELURATE

THE INTEGRATED OF THE LEAD WASTES
IN TELLURATE GLASSES
In this work, we report structural investigations on vanadate-tellurate and borate-tellurate glasses system doped with lead oxide obtained by melt quenching method. The purpose of this paper was i) to integrate of the lead ions in these glasses and ii) to investigate of the structural properties of the obtained glasses in order to possible applications in the wastes recycling.
FTIR spectra analysis suggests that the lead oxide generates the rapidly deformation of the Te-O-Te linkages from [TeO4] structural units. Further the excess of oxygen ions can be accommodated in the host matrix by conversion of some [VO4] structural units into pyro vanadate units. Then, the increase of the lead oxide in the borate-tellurate matrix will produce the intercalation of [PbOn] entities where n=3 and 4.
Based on FTIR results, we found that the increase of the lead oxide in the borate-tellurate network suggests a gradual inclusion of these ions in the host matrix by the intercalation of [PbOn] structural units.
Keywords: bottles of lead telluride-based, IR, recycling
Cuvinte cheie: sticle telurate pe bază de plumb, spectroscopie IR, reciclare

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28-72 MANAGEMENTUL MEDIULUI ȘI DEZVOLTAREA DURABILĂ

ENVIRONMENTAL MANAGEMENT AND
SUSTAINABLE DEVELOPMENT
International Standardization Organization (ISO) supports organizations to meet the challenges of climate change using quantification standards, verification of emissions of greenhouse gases and methods for measuring the carbon footprint of products. Using environmental standards, ISO provides environmental objectives by encouraging the inclusion of environmental aspects into product design and buildings.
Therefore, international standard have become increasingly important as environmental management practices provide common and comparable to support sustainable development goals of organizations in their organization, their products and service.
Keywords: management, environment, environmental issues, sustainable development, social responsibility, economic benefits, environmental benefits specific
Cuvinte cheie: management, mediu, aspecte de mediu, dezvoltare durabila, responsabilitate socială, avantaje economice, avantaje specifice de mediu

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28-71 DEZVOLTAREA DURABILĂ ÎN CONSTRUCŢII ŞI METODE DE EVALUARE A PERFORMANŢEI DE MEDIU

SUSTAINABLE DEVELOPMENT IN CONSTRUCTION
AND METHODS OF ENVIRONMENTAL
PERFORMANCE EVALUATION
Under the conditions of present society in which providing an optimum interior comfort in buildings is confronted with the necessity of the energy consumption reduction, solving this problem depends on the factors which contribute to the achievements of this comfort. There are a number of international standards for sustainability in buildings and construction works. Standards identifies and describes issues that must be taken into account in the design and use of assessment methods of environmental performance for new or existing buildings in connection with the design, construction, operation, maintenance and renovating them, and demolition phases. Assessment and understanding of the environmental performance of buildings is essential to know the possible impact that buildings could have on the environment and their influence on sustainable development.
Keywords: sustainable development, building, method of assessment, environmental performance, environmental issues, impact on the environment, climate change, indoor comfort, low energy consumption, benchmarking, continuous improvement, increase energy efficiency, energy audit
Cuvinte cheie: dezvoltare durabilă, clădire, metodă de evaluare, performanţă de mediu, aspecte de mediu, impact asupra mediului, schimbare climatică, confort interior, consum redus de energie, analiză comparativă, îmbunătăţire continuă, creştere eficienţă energetică, audit energetic

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28-70 ECOEFICIENŢA REUTILIZĂRII MATERIALELOR PLASTICE ÎN CUPTOARELE INDUSTRIALE

ECO-EFFICIENT REUSE OF PLASTICS
IN INDUSTRIAL FURNACES
Advanced recycling of plastics contributes significantly to enhance environmental management implementation that allows environment and economy to coexist harmoniously in a sustainable development paradigm of the beginning of this century. Today plastics are generated from a variety of sources and large amounts of material are deposited, resulting in difficulties in storage. Industrial processing or storage of plastics is extremely difficult and has become a social problem in recent years. Recycling of plastics in industrial furnaces can be a solution for the reduction of environmental impact and efficient use of natural resources limited and the process of exhaustion. Implementation of a new technology for recycling of plastics can be problematic due to significant differences properties related to the different weight of the components of the eco-efficiency analysis system that must be customized.
Keywords: plastics recycling, environmental impact, eco- efficiency analyse
Cuvinte cheie: reciclarea materialelor plastice, a impactului asupra mediului, analiză ecoeficientă

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28-69 ANALIZA POSBILITĂŢILOR DE REDUCERE A FRACŢIEI DE STICLĂ LA DEPOZITAREA DEŞEURILOR REZULTATE DIN RECICLAREA AUTOVEHICULELOR SCOASE DIN UZ

ANALYSIS OF THE POSSIBILITIES OF REDUCING THE GLASS FRACTION OF THE STORAGE RECYCLING
WASTE FROM SCRAPPED VEHICLES
Increased use of different materials in the manufacture of products led to the complex problems related to recycling at end of life. Reducing the amount of material deposited is a goal that should be taken into consideration at all times complies in recycling of materials in accordance with the law more restrictive. Explore the possibility of reducing glass fraction from scrapped vehicles stored represents the desire of this article. Based on the analysis and determinations are capabilities and experimental results illustrated the fundamental data about recycling of materials in reducing the amount of plastic land filled.
Keywords: scrapped vehicles, glass, recycling, environmental impact
Cuvinte cheie: vehiculelor scoase din uz, sticlă, reciclare, impactul asupra mediului

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28-68 ECOETICHETAREA – O CONTRIBUŢIE LA O PLANETĂ MAI DURABILĂ ŞI MAI SĂNĂTOASĂ

ECO LABEL – A CONTRIBUTION TO A PLANET MORE SUSTAINABLE AND HEALTHIER
This paper describes the types of eco labels currently available products are eco labelled and the steps you have to go through an organization that wants to certify their products.
Keywords: Eco-label, environmental management, symbol, voluntary environmental tools
Cuvinte cheie: Eco eticheta, managementul de mediu, simbol grafic, instrumente voluntare de mediu

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28-67 SOLUŢII PENTRU COMBUSTIBIL ALTERNATIV DIN DEŞEURI MUNICIPALE SOLIDE “URBAN COMBUSTIBIL – 20”

SOLUTIONS FOR ALTERNATIVE FUELS FROM
MUNICIPAL SOLID WASTE “URBAN COMBUSTIBLE – 20”
Develop a strategic process of integrated waste management having an important role in the development of a sustainable waste management. The solutions are aimed at establishment of technological flows of waste management and treatment options, recycling and disposal of waste recycled. Implementation of these solutions aimed: to reduce the amount of waste deposited, optimizing the collection and treatment of municipal solid waste in order to obtain a complementary income sources due to processing waste. It is worth mentioning that the results obtained were as targeted as potential beneficiaries of alternative fuel in cement plants and thermal power plants.
Keywords: urban combustible, alternative fuel
Cuvinte cheie: urban combustibil, combustibil alternativ

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28-66 TENDINŢE ÎN EXPLOATAREA ŞI UTILIZAREA RESURSELOR NATURALE

TRENDS IN OPERATION AND USE OF
NATURAL RESOURCES
Industrial society as a whole is harmful natural systems on which life and do not accept that there are limits to the planet’s ability to provide resources and absorb industrial waste. Only a balance between natural and artificial, between what can and can give and take in nature, between growth and decline, it could prevent the current crisis, which, if continued, will question the very existence of man on earth.
Keywords: natural resources, recycling, waste
Cuvinte cheie: resurse naturale, reciclare, deșeuri

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28-65 ENERGIA ȘI MEDIUL – DIN PERSPECTIVA STANDARDIZĂRII EUROPENE

ENERGY AND ENVIRONMENT – EUROPEAN STANDARDIZATION PERSPECTIVE Energy and environmental policies are interlinked with energy production and environmental impact. Standardization plays an important role in efforts to protect the environment and promote sustainable development. This is because standards directly relate to the design of products and processes. The standards define acceptable levels of energy use, waste management procedures and other measures to protect the environment. The developments of standards, technical committees (TC) are needed to ensure that the impact of products, services and processes on the environment are taken into account at every stage of its lifecycle. The key objective of the „CEN approach to the environmental aspects of products and services to standards” is to implement a framework to promote and ensure better inclusion of these issues in European standards. EU environmental legislation and agenda of the European Commission (EC) on resource efficiency are directed to ensure that EU policies take full advantage of all the potential to reduce the risks and impact of energy consumption. This will bring direct and indirect improvements on health and the environment, reduce imports and will enable the EU to better compete internationally in a world of limited resources.

Keywords: energy, limited resources, environmental policy, standardization, environmental law EU agenda European Commission (EC)

Cuvinte cheie: energia, resurse limitate, politici de mediu, standardizarea, legislația de mediu a UE, agenda Comisiei Europene (CE)

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28-63 OPTIMIZAREA FABRICAȚIEI PĂRȚILOR ACTIVE ȘI ELEMENTELOR DE GHIDARE ALE ȘTANȚELOR ȘI MATRIȚELOR

OPTIMIZING PRODUCTION WORK AND GUIDING
ELEMENTS OF DIES AND MOLDS
This paper analyses the behaviour of the active parts and guidance elements of dies and moulds in the complex production process.
Analysis concerns the duration of use, number of uses without regrinding in different lubrications conditions.
Keywords: punching moulds, active part, guiding elements, number of uses
Cuvinte cheie: ștanțe-matrițe, părți active, elemente ghidare, număr de utilizări

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28-62 PRELUCRAREA SUPRAFEŢELOR CURBE COMPLEXE, PRIN UTILIZAREA FREZELOR CU CAP SFERIC

MACHINING COMPLEX CURVED SURFACES, USING SPHERICAL HEAD MILLS
The complexity of a piece configuration is determined by its functional role, mechanical loading system, operating conditions. Surfaces defining a piece in space can be expressed by means of parametric equations. A surface profile can be completely defined if that surface intersects two planes perpendicular to each other. Surface intersection curves resulting data with those plans have as expressions, analytical equations. Machining end mills with spherical head is a very complex process, due primarily blade arrangement on a spherical surface. The solution for successful machining of complex curved surfaces is to use mills with spherical head.
Keywords: parametric equations, analytical equations, end mills spherical head – CAD modelling 3D graphics
Cuvinte cheie: ecuații parametrice, ecuaţii analitice, freze cilindro-frontale cu cap sferic, modelare grafică 3D-CAD

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28-61 STUDII ŞI CERCETĂRI PRIVIND ELEMENTELE FILTRANTE SINTERIZATE

STUDIES AND RESEARCH ON SINTERED
FILTER ELEMENTS
This paper presents methods for obtaining and using filter elements, purpose to identifying the best technologies for obtaining and using filter elements, in terms of investment and operating costs specific to various industrial clusters and their use in the purification water. The paper purpose to analyse the current state of research in this area, national, European, and international, trying to find similarities between of the same socio-economic environments in Romania, Europe and/or internationally and to supplement it with new information, specific technologies of obtaining materials sintered filter.
Keywords: filter elements, sintered filter elements, methods of analysis, applications
Cuvinte cheie: elemente filtrante, elemente filtrante sinterizate, metode de analiză, aplicaţii

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28-60 CERCETĂRI PRIVIND CALITATEA ÎMBINĂRILOR SUDATE DIN OȚEL TERMOREZISTENT

RESEARCH OF WELDED JOINTS HEAT-RESISTANT STEEL
Alloy and not alloy steels, with specified elevated temperature shall be prepared in accordance with SR EN 10216 – 2 + A2 – 2008 Standard. Structural examinations and mechanical tests performed on weld heat-resistant steels have shown the possibility of establishing, with some degree of certainty, the correlations between the type of microstructure and mechanical characteristics.
Solid solution hardening due to the presence of dislocations, the precipitating and foreign atoms from the network, represent a very important element to be taken into account in determining the structural and mechanical properties of heat-resistant alloy and not alloy steels wieldable.
Keywords: heat resistant steel, welded joint quality, mechanical stress, creep, ductility
Cuvinte cheie: oțel termorezistent, calitatea îmbinării sudate, solicitări mecanice, fluaj, ductibilitate

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28-59 INFLUENŢA SPUMELOR ACTIVE ASUPRA UNOR STRATURI METALICE DE ACOPERIRE

INFLUENCE ON ACTIVE FOAM LAYERS OF METAL
This paper aims to achieve a bibliographical study and practical research on technologies for coating metal layers, especially nickel-based alloys and their use in automotive and foams active influence on them in the wash. It was found that with the wear caused by aging and external factors, including repeated washing, auto parts nickel, shows a frosting, that glossy look is diminished, so is looking for a foam manufacturing assets that do not affect the optimal structure of material basis of their physical properties.
Keywords: active foam, nickel plated parts, metal coating
Cuvinte cheie: spumă activă, piese nichelate, straturi de acoperire

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28-58 ASPECTE PRIVIND OBŢINEREA MATERIALELOR POROASE ARMATE

ASPECTS OF REINFORCED POROUS MATERIALS OBTAINING
The sintered materials of metal powders have low mechanical properties, which is why a reinforced process can improve these properties. The reinforcement is made of steel webs with square cell and particle size distribution of the powder deposited on these elements must be within the network parameter data. The materials obtained by sintering at 800 0C for 30 minutes in a hydrogen atmosphere have a uniform structure with a good pores distribution. The metal network influences the development of breakage and increases the tensile strength.
Key words: porous materials, powders, powder metallurgy
Cuvinte cheie: materiale poroase, pulberi, metalurgia pulberilor

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28-57 CERCETĂRI PRIVIND REALIZAREA UNOR PLĂCUŢE DIN OXID DE ZIRCONIU PENTRU AŞCHIEREA METALELOR

RESEARCHES ON THE IMPLEMENTATION OF ZIRCONIUM OXIDE INSERTS FOR CUTTING METALS
The paper attempts to demonstrate superior performance of cutting inserts made of zirconia, a ceramic material superior aluminum oxide used more as a structural material in dentistry for dental prosthetics works. Also it intends to recycle the unused blank zirconia to obtain a cost reduction of dental prosthetics works.
Keywords: process of cutting, tool wear, zirconia, dental work
Cuvinte cheie: proces de aşchiere, uzura sculei, zirconia, lucrări dentare

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28-56 CERCETARE PILOT PENTRU PRODUCEREA CONTACTELOR ELECTRICE PENTRU CURENŢI INTENŞI PRIN METALURGIA PULBERILOR

PILOT RESERARCH FOR PRODUCTION OF
ELECTRICAL CONTACTS FOR STRONG CURRENTS
BY POWDER METALLURGY
There were experienced three pilot versions for electrical contacts for strong currents, W – Cu, by powder metallurgy. Based on these it was selected the following variant: Cu matrix composite reinforced with W, starting from the powder: W – 50.18 mass %, Ni – 1.02 %, Cu 48.06 %, and 0.74 % zinc stearate. 8 GPa pressed, sintered at 875 °C for 15 minutes, then infiltrated with Cu to fill the pores, resulting in a product that has a density of 11.738 kg/m3, similar to the theoretical density. It is noted that often remain additions of no infiltrated Cu and sometimes may appear craters in place of infiltration. It is preferred the version with as little as possible infiltrated Cu.
Keywords: sintered electrical contacts, W-Cu
Cuvinte cheie: contacte electrice sinterizate, W-Cu

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28-55 CERCETĂRI PRIVIND OBȚINEREA FERITEI DE ZINC ÎN STARE NANOCRISTALINĂ/NANOMETRICĂ FOLOSIND METODA CERAMICĂ ȘI MĂCINARE MECANICĂ (II)

RESEARCH REGARDING OBTAINING ZINC FERRITE IN NANOCRYSTALLINE/NANOMETRIC STATUS USING THE CERAMIC METHOD AND MECHANICAL MILLING (II)
This paper presents a research regarding the procedure of obtaining the zinc ferrite in nanocristalline/nanometer state throw the standard procedure as ceramic method and then applying the mechanical milling. As a start material we use zinc ferrite. We apply the ceramic method and then we mill the material in two types of environment (dry and with solution). For analysing the results we use SEM, DSC and X-ray diffraction. In the end we obtain zinc ferrite in nano crystalline and nonometer status.
Keywords: nanocrystalline, nanometric, zinc ferrite, SEM, DSC, EDX
Cuvinte cheie: nanocristalin, nanometric, ferita de zinc, SEM, DSC, EDX

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28-54 CERCETĂRI PRIVIND OBȚINEREA FERITEI DE ZINC ÎN STARE NANOCRISTALINĂ/NANOMETRICĂ FOLOSIND METODA CERAMICĂ ȘI MĂCINARE MECANICĂ (I)

RESEARCH REGARDING OBTAINING ZINC FERRITE IN NANOCRYSTALLINE/NANOMETRIC STATUS USING THE CERAMIC METHOD AND MECHANICAL MILLING
This paper present a research regarding the procedure of obtaining the zinc ferrite in nanocristalline/nanometer state throw the standard procedure-ceramic method (first step) and after applying the mechanical milling (second step). As a start material we use zinc ferrite. We apply the ceramic method and then we mill the material in two types of environment (dry and with solution). For analysing the results we use SEM, DSC and X-ray diffraction. In the end we obtain zinc ferrite in nanocrystalline and nonometer status.
Keywords: nanocrystalline, nanometric, zinc ferrite, SEM, DSC, EDX
Cuvinte cheie: nanocristalin, nanometric, ferita de zinc, SEM, DSC, EDX

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28-53 ASPECTE EXPERIMENTALE PRIVIND ANALIZA SUPRAFEŢELOR METALICE CU AJUTORUL SPECTROSCOPIEI DE FOTOELECTRONI XPS

EXPERIMETAL ISSUES REGARDING METALLIC SURFACES ANALYIS BY XPS PHOTOELECTRON SPECTROSCOPY
In this paper is described the experimental setup used for X-ray Photoelectron Spectroscopy (XPS) analysis of metallic surfaces. Also, references are made to analysis technique details and obtained results (i.e. photoelectron spectra).
Keywords: XPS photoelectron spectroscopy, spectrum, X-Ray source
Cuvinte cheie: spectroscopie de fotoelectroni XPS, spectru, sursă de raze X.

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28-52 CARACTERIZAREA LIANTULUI FOLOSIT PENTRU FORMAREA PRIN INJECŢIE A MATERIALELOR COMPOZITE CU MATRICE DIN ALUMINIU ŞI PARTICULE DE CARBURĂ DE SILICIU ŞI GRAFIT

CHARACTERIZATION OF BINDER UTILIZED FOR INJECTION MOLDING OF ALUMINIUM MATRIX COMPOSITE WITH GRAPHITE AND SILICON CARBIDE PARTICLES
Powder Injection moulding is considered a novel technique for the manufacture of complex shape samples of ceramic or metal powders. It consists in: powder mixing with a binder, injection into a form; binder removal, and sintering. Injection moulding technology is characterized by high stability and productivity. It makes possible to use uncomplicated and inexpensive equipment. The most important for a binding agent is to be thin to reduce the force of attraction between solid particles of different sizes in order to reduce the viscosity. By adding a small quantity of binder it should provide a good formation of the mixture, ready for separation of the preform to retain the shape and strength of injection moulded sample. The sample is quickly removed and does not contaminate the carbon material contained in waste, or other products.
Keyword: binder, injection moulding, sintering, preform
Cuvinte cheie: liant, formare prin injecţie, sinterizare, preformă

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28-51 ANALIZA PROCESĂRII MATERIALELOR PRIN TURNARE ÎN CONTEXTUL DEZVOLTĂRII NOILOR PROCEDEE

ANALYSIS OF MATERIALS PROCESSING BY CASTING
IN THE DEVELOPMENT OF NEW PROCEDURES
In present casting have gained a significant position in the engineering arena and is one of the most important domain in manufacturing. Achieving casting usually require a greater complexity to the design and material processing to ensure a structural integrity. These include a complex system in which the processing conditions are crucial and require an appropriate design of material grades used.
The technologies used in the processing of materials by casting are characterized by mostly by a sinuous, complicated, sometimes technological consideration during raw material to finished product. Recent decades have marked the emergence of the current industrial exploitation in the processing of materials, preoccupations more intensely related to the reduction and optimization of material and energy consumption linked with improving the environment. Specific procedures for processing materials were continuously developed and have come to represent today’s modern and efficient alternatives for obtaining materials and products development prospects and future use special.
Keywords: casting materials processing, technological development, new procedures
Cuvinte cheie: turnare prelucrare materiale, dezvoltare tehnologică, noi proceduri

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28-50 DISPOZITIV DE ÎNTRERUPERE INSTANTANAEE A AŞCHIERII PRIN STRUNJIRE

A CUTTING INSTANTANAEE SWITCHING
DEVICE BY TURNING
Study the conditions that must occur in a process of cutting given realization of all aspects and economic conditions will be listed as follows: achieve adequate productivity, meaning that a certain amount of chips per unit time; minimum cost, including the calculation elements involved in the cutting process; provide optimum surface roughness that is processed; machined surface hardening; structural changes that alter the functionality of that surface.
Keywords: turning, device, cutting metals, materials
Cuvinte cheie: strunjire, dispozitiv, aşchierea metalelor, materiale

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28-49 DISPOZITIV DE RECTIFICARE A SUPRAFEŢELOR ELICOIDALE LA SCULE ASCHIETOARE ATAȘABIL PE MAȘINI DE RECTIFICAT PLAN

GRINDING DEVICE OF HELICALLY SURFACES
TO CUTTING TOOLS, ATTACHED TO FLAT
GRNDING MACHINES
This paper presents the operating principle of a device for grinding
helical surfaces on the rake face of the cutting tools, adaptable on the flat
grinding machines. Also this paper presents formula adjustment device shown.
Keywords: helical movement adjustment formula
Cuvinte cheie: mişcare elicoidală, formulă de reglare

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28-48 OPORTUNITATEA VIZUALIZĂRII FORMĂRII CONTROLATE A DOPULUI DE GHEAŢĂ PE UN TRONSON DE CONDUCTĂ ORIZONTALĂ

THE CONVENIECE OF VISUALISING THE CONTROLLED FORMATION OF ICE PLUGS IN HORIZONTAL PIPE-LINE SECTION
The technique of forming controlled ice plugs in pipe-line installations in order to isolate a section from the rest of the circuit is used for carrying out circuit maintenance or repair activities without shutting down the entire installation. The geometrical characteristics of the ice plug can vary from one test to another, depending on the conditions under which the test is being carried out and the events that occur during this time. Studying this process requires visualizing the forming of ice layers inside the pipe.
This paper describes the convenience of visualizing the formation of ice plugs by studying the effect of the events and interventions that occur during controlled tests that have been carried out in horizontal pipe-line sections.
Key words: isolating a pipe-line section, visualizing the forming of ice layers
Cuvinte cheie: izolarea unui tronson de conductă, vizualizarea depunerii de gheaţă

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28-47 ECHIPAMENT MOBIL CU ACŢIONARE HIDRAULICĂ PENTRU BLOCAREA CĂILOR DE ACCES PARTEA a II-a INSTALAŢIA HIDRAULICĂ DE ACŢIONARE

MOBILE EQUIPMENT WITH HYDRAULIC DRIVING FOR
BLOCKING ACCESS ROADS.
PART II – HYDRAULIC DRIVING SYSTEM
The paper presents mobile equipment with hydraulic drive for blocking of the streets with access prohibited areas. In the paper, is shows the structural component of equipment, the technical characteristics and, also, its usefulness in airside control actions of the Romanian Gendarmerie in its missions.
Keywords: lock equipment, mobile equipment, hydraulic, hydro -mechanical equipment
Cuvinte cheie: echipament de blocare, echipament mobil, acţionare hidraulică, echipament hidro-mecanic

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28-46 ECHIPAMENT MOBIL CU ACŢIONARE HIDRAULICĂ PENTRU BLOCAREA CĂILOR DE ACCES PARTEA I – CONCEPŢIA GENERALĂ A ECHIPAMENTULUI

MOBILE EQUIPMENT WITH HYDRAULIC DRIVING
FOR BLOCKING ACCESS ROADS.
PART I–GENERAL CONCEPTION
The paper presents mobile equipment with hydraulic drive for blocking of the streets with access prohibited areas. In the paper, is shows the structural component of equipment, the technical characteristics and, also, its usefulness in airside control actions of the Romanian Gendarmerie in its missions.
Keywords: lock equipment, mobile equipment, hydraulic, hydro -mechanical equipment
Cuvinte cheie: echipament de blocare, echipament mobil, acţionare hidraulică, echipament hidro-mecanic

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28-45 SISTEM ROBOTIZAT DE TIP EXOSCHELET DESTINAT RECUPERĂRII MEMBRULUI SUPERIOR

ROBOTIC EXOSKELETON FOR UPPER LIMB REHABILITATION
Based on upper limb structure and its model – presented in the first part of the paper – o short overview on rehabilitation robotic wearable exoskeletons is given and the developed systems are analysed: a two degree-of-freedom (DOF) shoulder – elbow exoskeleton and a six DOF shoulder–elbow–wrist exoskeleton.
Keywords: exoskeleton , upper limb , recovery
Cuvinte cheie: exoschelet, membru superior, recuperare

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28-44 TESTAREA ECHIPAMENTELOR SPECIFICE TEHNOLOGIEI DE ASISTARE

TESTING ASSISTIVE TECHNOLOGY SPECIFIC EQUIPMENT
This paper gives a short presentation of Assistive Technology – which helps and supports the functional capacity of the human being – and most important tests faced by equipment used in this field. For a mobility aid (a Rollator) all specific tests are detalied emphasized.
Keywords: assistive technology, testing, unrolled
Cuvinte cheie: tehnologie asistivă, testare, rolator

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28-43 PROIECTAREA SOFTWARE A UNEI INSTALAŢII ELECTRICE INDUSTRIALE CU PANOURI FOTOVOLTAICE

SOFTWARE DESIGN OF AN INDUSTRIAL ELECTRICAL INSTALLATION, USING PHOTOVOLTAIC SYSTEM
In present article we describe, the design of industrial buildings supply electrical installation, using RETScreen International software, version 4.0. We choose location and enter design initial data. Through the steps of design, we establish the number of solar panels, needed to be mounted industrial hall.
Keywords: design, power supply, photovoltaic panels, RETScreen International version 4.0
Cuvinte cheie: proiectare, alimentare cu energie electrică, panouri fotovoltaice, RetScreen International versiunea 4.0

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28-42 SURSE REGENERABILE DE ENERGIE DE NATURĂ ORGANICĂ – ASPECTE DE STANDARDIZARE

RENEWABLE ENERGY SOURCES OF ORGANIC NATURE – ASPECTS OF STANDARDIZATION
The use of renewable energy sources together with energy efficiency improvements can help to reduce energy consumption, greenhouse gas emissions and, consequently, to prevent dangerous climate change. This document presents aspects of standardization regarding renewable energy sources of organic nature.
Keywords: renewable sources, biomass, biogas, biofuels
Cuvinte cheie: surse regenerabile, biomasă, biogaz, biocombustibili

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28-41 REZULTATE PRIVIND MONITORIZAREA RISCURILOR ÎN ZONA TRANSFRONTALIERĂ ROMANIA-BULGARIA. Partea a II-a

MONITORING RESULTS RISK AREA
ROMANIA-BULGARIA CROSS-BORDER. PART II
In the period 2011-2014 was developed the cross-border project RO-BG MIS ETC 166 ”Joint Risk Monitoring during Emergencies in the Danube Area Border ”.The objectives were:1. Conceiving and realization of photovoltaic system for anti-hail units power supply system.2. Conceiving and realization of automatic control system for the rockets launch ramp.3. Conceiving and realization the monitoring system of information necessary for the efficient operation of the equipment’s part of antihelix units. Some of the equipment will be taken in mass production by SC Electromecanica Ploiesti, authorized for the production of the assemblies to the national antihelix system.
Keywords: risk, monitoring, cross border, hail
Cuvinte cheie: risc, monitorizare, transfrontalier, grindină

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28-40 REZULTATE PRIVIND MONITORIZAREA RISCURILOR IN ZONA TRANSFRONTALIERĂ ROMANIA-BULGARIA. Partea I-a

MONITORING RESULTS RISK AREA
ROMANIA-BULGARIA CROSS-BORDER. PART I
In the period 2011-2014 was developed the cross-border project RO-BG MIS ETC 166 ”Joint Risk Monitoring during Emergencies in the Danube Area Border ”.The objectives were:1. Conceiving and realization of photovoltaic system for anti-hail units power supply system.2. Conceiving and realization of automatic control system for the rockets launch ramp.3. Conceiving and realization the monitoring system of information necessary for the efficient operation of the equipment’s part of antihelix units. Some of the equipment will be taken in mass production by SC Electromecanica Ploiesti, authorized for the production of the assemblies to the national antihelix system.
Keywords: risk, monitoring, cross border, hail
Cuvinte cheie: risc, monitorizare, transfrontalier, grindină

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28-39 MECANISM CENTRIFUGAL DE PROTECȚIE LA SUPRATURARE A ROTORULUI DE TURBINĂ EOLIANĂ

PROTECTION CENTRIFUGAL MECHANISM OF
THE WIND TURBINE ROTOR AT OVERSPEED
The protection centrifugal mechanism at overspeed described in this paper is designed and made for a wind aggregate of 5 kW. This mechanism is a complex system, designed as an automatic mechanical system to react without electronic control. Only the returning to the initial state is controlled by the electronic system of automatic control of the wind turbine. The triggering of the centrifugal mechanism must be followed by the locking in its extreme position of the rotation of the blades. After locking, the speed is reduced to 20 … 30 rpm then, if weather conditions allow, it gives the command to unlock the centrifugal mechanism so the mechanism returns back to the normal working position.
Keywords: wind turbine, protection centrifugal mechanism at over speed, locking-unlocking device
Cuvinte cheie: turbină eoliană, mecanism de protecţie la supraturare, dispozitiv de blocare-deblocare

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28-38 STAND PENTRU TESTAREA MECANISMULUI CENTRIFUGAL DE PROTECȚIE LA SUPRATURARE A UNUI ROTOR DE TURBINĂ EOLIANĂ DE 5 kW

STAND FOR TESTING THE OVERSPEED PROTECTION CENTRIFUGAL MECHANISM OF A 5 KW
WIND TURBINE ROTOR
The testing stand is designed to check the rotor protection complex system of a wind aggregate of 5 kW at over speed. The planned complex system is designed as an automatic mechanical system to react without electronic control. Only the returning to the initial state is controlled by the electronic system of automatic control of the wind turbine. The stand checks triggering centrifugal mechanism when is achieved the maximum rotation speed initially prescribed. The triggering of the centrifugal mechanism must be followed by the locking in its extreme position of the rotation of the blades. After locking, the centrifugal speed is reduced to 20 … 30 rpm then, if weather conditions allow, it gives the command to unlock the centrifugal mechanism. An electric motor drives a cam which raises the locking pin so that the centrifugal mechanism returns back to the normal working position. The adjusting of the centrifugal counterweight of the centrifugal mechanism and the impeccable operation of the whole automatic system should be checked on the testing stand. The purposes of the tests are to adjust, check and improve the endurance of the mechanism.
Keywords: wind turbine, testing stand, protection mechanism at overspeed, locking-unlocking device
Cuvinte cheie: turbină eoliană, stand de probă, mecanism de protecţie la supraturare, dispozitiv de blocare-deblocare

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28-37 SISTEM DE CONVERSIE CU TURAŢIE VARIABILĂ A ENERGIEI EOLIENE ŞI HIDRAULICE UTILIZÂND GENERATORUL ELECTRIC ASINCRON CU DOUĂ ÎNFĂŞURĂRI STATORICE

WIND AND HYDRO VARIABLE SPEED ENERGY CONVERSION SYSTEM WITH DUAL STATOR WINDING INDUCTION GENERATOR
Induction generator with dual stator winding is very good for low power and speed, wind and hydro power plant systems, because it has a good controllability, low reactive power consumption, low cost and flexible characteristics. In this paper is presented an variable speed energy conversion system with this type of generator.
Keywords: induction generator stator windings, low power and speed, wind and hydraulic active rectifier, diode bridge
Cuvinte cheie: generator electric asincron două înfăşurări statorice, putere şi turaţie reduse, energie eoliană şi hidraulică, redresor activ, punte cu diode

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28-36 CONSIDERAȚII PRIVIND PROGNOZA CONSUMULUI DE GAZE PRIN EXTRAPOLARE

CONSIDERATIONS ON PROGNOSIS GAS
CONSUMPTION BY EXTRAPOLATION
It is known that forecasts have a decisive contribution in the process of establishing long-term development strategies. This is happening, because in developing a strategy, we have to explore the future. This challenge becomes more important because of the accelerated pace of technical progress that has an essential role. The strategy for gas consumption should be preceded by developing predictions as accurate in time.
Keywords: energy, energy security, prognosis, mathematical modeling, extrapolation, natural gas consumption
Cuvinte cheie: energie, securitatea energetică, prognoză, modelare matematică, extrapolare, consumul de gaze naturale

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28-35 ELEMENTE PRIVIND CONCEPŢIA ŞI PROIECTAREA UNUI PROTOTIP DE MINIROBOT ŞENILAT – “ROBO GRIPES” – CU ACŢIONARE ELECTRICĂ OBŢINUTĂ PRIN CAPTARE DE ENERGIE SOLARĂ

ELEMENTS ON THE CONCEPT AND DESIGN OF A TRACKED MINI ROBOT PROTOTYPE – “ROBO GRIPES” –
WITH ELECTRIC ACTIONING OBTAINED FROM SOLAR ENERGY CAPTURE
The authors of this paper wish to highlight elements regarding the organology and the integration of the hardware component, functioning and simulation, in the real workspace, of a tracked mini robot prototype with electric auctioning obtained from solar energy capture with a load of explosives attached. The technological product developed and designed after completion of the experimental prototype is subject to a national patent (no. RO a 00684, issued by O.S.I.M.) granted to our institution, the result of research activities undertaken under a contract won by national competition, a grant for young research teams, PN-RU-TE-2010 type. The experimental prototype of a tracked mini robot, called Robo Gripes, part of the unmanned ground vehicles category having the ability to act autonomously and enabling its endowment with means of observation, listening, tapping, relaying, jamming and demining/reclamation of UXOs and IEDs. This paper reveals, in detail, the composing parts of the hardware component, as well as the way they are assembled in the mechanical structure of the mini robot under study.
Keywords: small robot Track, advanced military technology, „partnership” human – artificial, modularized structure, special applications
Cuvinte cheie: minirobot şenilat, tehnologii militare avansate, “parteneriat” uman-artificial, structură modularizată, aplicaţii speciale

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