1995-2015: Recent submissions

Afișează articolele 161-180 of 326

    • The Wear Influence on the Working Condition 

      Simionescu, Cristian-Silviu (Universitatea "Dunarea de jos' din Galaţi, 2003)
      During the operation, any machine, equipment, machine parts, or piece, is submitted to a wear. The evolution in time of the wear size, or, in other words, a real form for the characteristic of the wear depends on ...

    • The Dynamics Analysis of the Forced Steady-State for the Vertical Towers Chillers with Internal Axial Flow Fan 

      Drăgan, Nicușor; Debeleac, Carmen (Universitatea "dunărea de Jos" din Galați, 2003)
      This study presents some of the phases of the physical and mathematical models' elaboration of the vertical tower chillers with a single axial flow fan, which are used in social and civil buildings to prepare conditioning air ...

    • Quality Concrete - Performing Concrete Plants 

      Ionescu, Ștefania; Poiovici, Roza; Tont, Valentin (Universitatea "Dunărea de Jos' din Galați, 2003)
      The buildings compositions quality, as well as resistance, stability and durability imposed by the law 10/1995 depends by the quality of concrete who should fulfil the conditions imposed by the Practical Code NE 012/99. The ...

    • Mechanization and Automation of the Construction Operations 

      Anghelache, Diana (Universitatea "Dunărea de Jos' din Galați, 2003)
      Modernizing operating technologies is the major goal of the construction engineering in order to reduce or eliminate manual labor. The increase of operating efficiency of the construction industry is related to the ...

    • Lifting Machinery the Efficiency Criterion 

      Anghelache, Diana (Universitatea "Dunărea de Jos" din Galați, 2003)
      Using lifting and carrying machinery in various environments leads to a considerable variation of operating time and mechanical devices or metallic structure state of load. Lifting equipment is a cyclic operating device ...

    • Using Dorrenberg Steel in Mchine Industry 

      Ciurea, Aurel (Universitatea "Dunareas de Jos" din Galați, 2003)
      The steels were, are and will be o long period of time the raw material in machine industry. Using of this materials implicate a very good technical performance for each type and theirs compatibility with the working ...

    • Treating Propriety Through Cutting of Metals and Alloys in Cryogenic Condition 

      Ciurea, Aurel (Universitatea "Dunărea de Jos" din Galați, 2003)
      It is known that a base function of cutting environments is to cool the cutting tools, the tooled area and the material that is removed under the shape of chip. But it is also known that beginning with the increase of ...

    • A Study Upon Traction Systems for Technological Machines with Auto Propulsion 

      Axinti, Adrian-Sorin (Universitatea "Dunărea de Jos" din Galați, 2003)
      This paperwork presents a comparison of traction systems used for heavy machines that needs to move on public roads. (construction devices, agriculture machines, etc.). Here are presented traction charts implemented on ...

    • The Character of the Dynamic Processes in the Proportional Servodriving Systems of the Hydraulic Pumps Capacity 

      Gavril, Axinti; Năstac, Silviu; Axinti, Adrian-Sorin; Debeleac, Carmen (Universitatea "Dunărea de Jos" din Galați, 2003)
      The proportional servodriving systems of hydraulics pump capacity are used in many more applications in tehnological equipments driving. Thus, the construction of specialized pumping hydraulics units, like the A10VG and ...

    • About Dynamic Stability Analysis of the Power Regulators With Exactly Hyperbolic Characteristic 

      Gavril, Axinti; Năstac, Silviu; Debeleac, Carmen; Axinti, Adrian-Sorin (Universitatea "Dunărea de Jos" din Galați, 2003)
      Power regulators are attached devices of hydraulic pumps with variable capacity. Theses have the means to modify the pump capacity depending of the pressure from the circuit served by the pump. In this way, it result ...

    • Dynamic of Industrial Tractors with THM for Construction 

      Sârbu, Laurenţiu (Universitatea "Dunărea de Jos" din Galaţi, 2003)
      Traction calculus is done to determine the main parameters of the equipment’ s engine and transmission designed to achieve the performances imposed in exploitation [1, 2, 3]. One of the base problem of the traction ...

    • Friction Coupling and Specific Phenomena 

      Simionescu, Cristian Silviu (Universitatea "Dunarea de Jos" din Galați, 2003)
      The present work object is to make the transitory conditions evolution evident,in coupling, by considering the friction moment which depends on angular speed. The friction moment is considered to be dependent on the relative ...

    • A Method for Establishing by Controlled Aproximation of the Limitted Forces Developed by Alignmed of the Hydraulic Cylinder 

      Hauk, Niculai; Goanță, Adrian Mihai; Ghelase, Daniela (Universitatea "Dunărea de Jos" din Galați, 2002)
      Determination of the limited forces – in case of the mechanisms actioned by the alignmed of the hydraulic cylinders is a very difficult problem to be realized very exactly. This paper presents a numerical method with a ...

    • Controlled Parameter Modelling of Casting Pieces Bushing Type 

      Goanță, Adrian Mihai; Hauk, Niculai; Rădulescu, Cătălin (Universitatea "Dunărea de Jos" din Galați, 2002)
      The workpaper proposes a computer assisted modality of projection in order to obtain casting semiforms, starting from the 3D totally standardized model of the casting piece. The advantage of such a method is that the ...

    • Influence of Geometrical Parameters on Rigidity of the Worm-Gearing Tooth 

      Ghelase, Daniela; Daschievici, Luiza; Hauk, Niculai (Universitatea "Dunărea de Jos" din Galați, 2002)
      By means of an original numerical method, the authors study the influence of the parameters of the worm-gearing tooth (diametral quotient, radius of profile curvature, profile angle of the worm, number of gear teeth) on ...

    • The consolidation Equipment Work Devices Vibrations Frequency Influence about the Railway Stabilization Process 

      Gaidoș, Aurelian (Universitatea "Dunărea de Jos" din Galați, 2002)
      In this work presented the experimental research realized on the stand in the laboratory. The experimental researches have as the goal the study of the influence the frequency vibration of the work device concerning the ...

    • Installation for Centrifugal Casting of Bimetallic Jacks 

      Eftimie, Dorin; Ciurea, Aurel (Universitatea "Dunărea de Jos" din Galați, 2002)
      This issue presents an bronze casting technology of steel jack by centrifuging as well as it’s installation. We try to realize a machine by date theme for mechanization of technological operation. The constructive solution ...

    • Considerations Upon Breaking Strength of Nodular Cast Iron Under Plastic Deformation 

      Ciurea, Aurel; Eftimie, Dorin; Goanță, Adrian Mihai (Universitatea "Dunărea de Jos" din Galați, 2002)
      The work aims to demonstrate the existence of a mathematics connection between breaking strength and degree of plastic deformation in case of nodular cast iron. Research made along time starting 1932-1934 until now, ...

    • Robot Type Manipulator for Serving of a Bolts Hardening System Outline 

      Ciurea, Aurel; Eftimie, Dorin; Ciurdariu, Gheorghe (Universitatea "Dunărea de Jos" din Galați, 2002)
      The paper work refers to a flexible manufacturing cell where the bolts hardening system within a relatively wide range of dimensions is completely automatic. For this purpose, a robot type manipulator serving an induction ...

    • Phisycal and Mathematical Model Forvibratory Driving Process Analysis 

      Cauteș, Gheorghe; Năstac, Silviu (Universitatea "Dunărea de jos" din Galați, 2002)
      Vibratory driving of pile is one of the technologies used for powerless basement soil deep consolidation. This process consist by favouring the pile penetration in soil, whereupon when vibrations using. Experimentally, was ...