Volumul 22


22-41 DISPOZITIV MECATRONIC DE DEPLASARE LINIARĂ CU CONTROLUL OPTOELECTRONIC AL MIŞCĂRII

In the paper is presented an experimental mechatronic device with an
optoelectronic control of movement, which was designed and manufactured in
INOE 2000-IHP Bucharest and which will be subjected on an experimental
program, in order to demonstrate its functionality and its performances and,
also, to validate the elected technical solution.

Cuvinte cheie: mecatronica, motor hidraulic liniar, control
optoelectronic, dispozitiv experimental
Keywords: Mechatronic, linear hydraulic motor, optoelectronic control,
experimental device

41 DISPOZITIV MECATRONIC DE DEPLASARE LINIARĂ


22-40 SISTEM AUTOMAT DE SORTARE STICLE COLORATE

The paper deals with the pneumatic drive system which sorts bottles
according to their color. In my study I used the method pneumatic drive system,
the: mechatronics, pneumatic drive system sorting colored bottles, recycling,
algorithms, controller, software, languages
Cuvinte cheie: mecatronică, sistem de acţionare pneumatic, sortare
sticle colorate, recirculare, algoritmi, controler, programe, limbaje
Keywords: mechatronics, drive system pneumatic sorting colored
bottles, recycling, algorithms, controller, software, languages

40 SISTEM AUTOMAT DE SORTARE


22-39 SIMULAREA NUMERICĂ CU ELEMENTE FINITE A PROCESULUI DE AMBUTISARE

For a number of complex processes such as the case treated in this
paper cold drawing, the simulation program requires a number of simplifications
of the elements that made this process.
Cuvinte cheie: ambutisare, simulare numerică, elemente finite
Keywords: drawing, numerical simulation, finite element

39 SIMULAREA NUMERICĂ CU ELEMENTE FINITE


22-37 APLICAREA METODEI FMEA PENTRU STUDIUL CALITĂȚII PIESELOR INJECTATE

This paper presents a case study using the method of analysis
Process FMEA. Method FMEA is a method of analysis and minimizing potential
risks. So we researched all kinds of defects potentially predictable causes and
effects. Benchmark study ist ‘’front panel’’ of the washing machine 1001
Diamond T made of plastic injection.
Cuvinte cheie: Metoda FMEA, calitate preventivă, minimizarea
riscurilor, neconformități
Keywords: Method FMEA, preventive quality, minimize risk, noncompliance

37 APLICAREA METODEI FMEA PENTRU STUDIUL


22-36 INFLUENŢA PARAMETRILOR DE SINTERIZARE ASUPRA DURITĂŢII SINTERIZATELOR DIN PULBERE DE FIER DWP 400

The present paper is focused on the hardness of iron powder DWP
400 parts sintered in endogas. The effect of sintering parameters is studied.
There were prepared cylindrical specimens pressed at 600 MPa and sintered in
endogas at the temperature of 1120 0C and 900 0C for 30/60 minutes. Sintered
specimens were analyzed by optical microscopy, micro-hardness test and
macrohardness measurements. Increasing the temperature and duration of
sintering leads to a linear increase of hardness of specimens, influencing
strongly the density and the microstructure.
Cuvinte cheie: sinterizare, duritate, pulbere fier
Keywords: sintering, hardness, iron powder

36 INFLUENŢA PARAMETRILOR DE SINTERIZARE


22-35 CARACTERIZAREA PRIN DIFRACȚIE CU RAZE X A UNOR PULBERI Cr- Fe-Al ȘI Cr-Fe-Co ALIATE MECANIC

Using milled Fe-Cr powder and introducing on these powders a small
amount of Co or Al powder, nanostructure alloys were obtained. Using X-ray
diffraction it was determined the crystallite size and the internal stress.
Williamson-Hall method was used for the crystallite size calculations. The
measurements were performed on a DRON 3 diffract meter and the data
acquisitions were performed using MATMEC IV software.
Cuvinte cheie: pulberi metalice, mori planetare, aliere mecanică
Keywords: metal powders, planetary mills, mechanical alloying

35 CARACTERIZAREA PRIN DIFRACȚIE CU RAZE X A


22-34 ASPECTE STRUCTURALE ALE AMESTECURILOR PULVERULENTE Fe60Ni40, Fe50Ni50, Fe40Ni60 SUPUSE ALIERII MECANICE

The mechanical alloying experiments were performed on a high
energy planetary ball mill. Four vials were used for powder mixtures milling.
The milling charge contains 46 steel balls having 15 mm average diameter and
100 g powder mixture. It corresponds to a charge level of ½ of the vial volume
and represents a 8:1 ball/powder ratio. The powder mixtures: Fe60Ni40, Fe50Ni50,
Fe40Ni60, were milled for 1, 2, 4, 8, 16, 32, 48 şi 64 hours. At each milling time
were taken samples for analysis (5 grams). The X-ray diffraction analysis
reveals that after 8 hours of milling the Fe peaks disappear and the Ni phase is
featured in all powder mass. The calculated crystal parameters prove that the
mechanical alloying process induces Ni structure for all powder mixtures after 8
hours of milling resulting a substitution solid solution where some Ni atoms
were replaced with Fe ones.
Cuvinte cheie: aliere mecanică, pulberi Fe Ni, moara planetară
Keywords: mechanical alloying, powder Fe Ni, planetary mill

34 ASPECTE STRUCTURALE ALE AMESTECURILOR


22-33 EVALUAREA OMOGENITĂŢII AMESTECURILOR DE PULBERI Fe-Nb, Fe-Ti şi Fe-V LA ELABORAREA OŢELURILOR SINTERIZATE MICROALIATE

The successful application of microalloying technique, used in the
HSLA steels elaboration by classical metallurgy, to the sintered structural steels
in order to improve their mechanical properties is determined, to a great extent,
by the homogeneity of Fe-microalloying element (Nb, Ti, or V) powder mixtures.
Therefore, its evaluation is of the maximum importance in the elaboration
process control in order to obtain the desired strengthening effect. The
possibility of application, for this purpose, of the statistical and experimental
method, respectively, is analyzed in this paper, with the reference to Fe-Nb, Fe-
Ti and Fe-V powder mixtures. Conclusions on factors affecting the homogeneity
degree, of practical applicability, are drawn on this basis.
Cuvinte cheie: oţeluri sinterizate, microaliere, proprietăţi mecanice
Keywords: sintered steels, micro, mechanical

33 EVALUAREA OMOGENITĂŢII AMESTECURILOR DE


22-32 INFLUENŢA CONŢINUTULUI DE CARBON, RESPECTIV DE CROM PENTRU OBŢINEREA UNOR CARACTERISTICI MECANICE SUPERIOARE A OŢELULUI 90VMoCr15

The paper presents correlations between mechanical characteristics
and the main alloying elements of steel 90VMoCr15 brand; this will get varying
characteristics Rp0, 2, Rm, A5 and Z, respectively breaking energy, depending
on content in steel of Cr and respectively C.
Cuvinte cheie: oţel, compoziţie chimică, energie de rupere, rezistenţa
la rupere, încercări mecanice, tensiuni
Keywords: steel, chemical composition, breaking energy, tensile
strength, mechanical tests, stress

32 INFLUENŢA CONŢINUTULUI DE CARBON,


22-30 CONCEPȚIA DISPOZITIVULUI DE DETERMINARE A COEFICIENTULUI FONOABSORBANT AL MATERIALELOR

This paper presents a constructive variant of acoustic impedance tube
used to determine the coefficient of sound absorption materials. This alternative
design brings a contribution in terms of the number of microphones mounted on
the tube impedance control of acoustic vibration generator. The paper contains
and the calibration system of microphones mounted on the device.
Cuvinte cheie: tubul de impedanţă, determinarea erorilor
Keywords: impedance tube, the determination of errors

30 CONCEPȚIA DISPOZITIVULUI DE DETERMINARE


22-29 STUDIUL DEPLASĂRII PRAGULUI AUDITIV CAUZAT DE ZGOMOTUL EMIS DE MAŞINILE-UNELTE

In industrial environments it is necessary to recognize, evaluation and
control of working places and working stations, as well as occupational groups
with exposure to noise. Therefore, this paper describe the noise effects on
hearing quality and an estimation method of noise – induced hearing
impairment. Using this method is made a comparative study of the noise
induced permanent threshold shift depending on the noise exposure level and
duration by various frequencies between 500 – 6000 Hz.
Cuvinte cheie: zgomot industrial, maşini-unelte, afecţiuni auditive
Keywords: industrial noise, machine tools, hearing disorders

29 STUDIUL DEPLASĂRII PRAGULUI AUDITIV CAUZAT


22-28 ACŢIUNEA VIBRAŢIILOR INDUSE DE MAŞINILE UNELTE PORTABILE ASUPRA SISTEMULUI MÂNĂ-BRAŢ

This paper will be a short presentation of the specialized literature and
international standards about the importance of vibration action of portable
machine-tools on human body and particularly on the hand-arm system.
Exposure to harmful vibrations can lead to health problems and
disorders, especially in the upper joints and dorsal region of the human body.
A thorough knowledge of the undesirable effects of vibration on the
human body is essential for realizing appropriate administrative, technical and
medical prevention measures.
Cuvinte cheie: vibraţii mecanice, maşini-unelte portabile, mană-braţ
Keywords: mechanical vibration, machine tools portable, hand-arm

28 ACŢIUNEA VIBRAŢIILOR INDUSE DE


22-27 CONSIDERAŢII TEORETICE PRIVIND MENTENANŢA PREDICTIVĂ A ANGRENAJELOR SUB ACŢIUNEA VIBRAŢIILOR

This paper is a survey of the literature on gear vibration and is
designed to offer a better understanding of the need for predictive maintenance
for safe operation of machine-tools and minimizing idle time and reducing repair
costs. The ultimate goal of predictive maintenance is the implementation of
maintenance works „when appropriate” before the equipment is damaged
during the operation. Main failure in a gear couple of a simple gearbox, are
defects on all teeth and defects localized only on a group of teeth. These
defects can be partitioned defects or localized defects.
Cuvinte cheie: unelte specifice, zgomot, vibraţii de viteze, eroare de
transmisie, de întreţinere predictivă
Keywords: spur gear, noise, gear vibration, transmission error,
predictive maintenance

27 CONSIDERAŢII TEORETICE PRIVIND MENTENANŢA


22-26 ABSORBŢIA SONORĂ A MATERIALELOR DIN AŞCHII DE LEMN CIMENTATE

This paper presents sound absorption measurements for a cemented
wood-fibber material. An acoustical model is presented in order to determine
physical properties like porosity, airflow resistivity and tortuosity. An inverse
acoustical characterization is used by best-fitting the model function to the
experimental data with the least squares method. The inversion method
contains an optimization process and hence it is verified that the optimal
unknown parameters, even though derived from a mathematical optimum for a
given experimental configuration (sample’s thickness, measured frequency
range), are the intrinsic properties of the characterized porous material.
Cuvinte cheie: impedanţa acustică, absorbţie sonoră, model
matematic

Keywords: acoustic impedance, sound absorption mathematical model

26 ABSORBŢIA SONORĂ A MATERIALELOR


22-25 AVANTAJELE ŞI DEZAVANTAJELE UTILIZĂRII VIBRAŢIILOR MECANICE ÎN ANTRENAMENTELE SPORTIVE

This paper is intended to be an analysis of the effects of mechanical
vibration on the human body, used in sports training and more.
It attempts to outline the benefits and possible risks that it has
vibration action in whole body (WBV). These potential benefits and possible
risks are strongly influenced by the type of vibration, frequency, amplitude and
duration of action of the stimulus.
Cuvinte cheie: vibraţii mecanice, efecte, antrenament, organism uman,
tonifiere musculară
Keywords: mechanical vibration effects, training, human body, muscle
toning

25 AVANTAJELE ŞI DEZAVANTAJELE UTILIZĂRII


22-24 STUDII PRIVIND ACȚIUNEA BENEFICĂ A VIBRAŢIILOR MECANICE ASUPRA OSTEOPOROZEI

The vibration method is a non invasive method in osteoporosis
treatment. It also helps muscle recovery and weight loss. In this paper we
analyze some of the current stage and prospects of this method.
Cuvinte cheie: osteoporoza, vibraţii, corpul uman
Keywords: osteoporosis, vibration, human body

24 STUDII PRIVIND ACȚIUNEA BENEFICĂ A VIBRAŢIILOR


22-23 CORELAŢIA CAUZĂ – EFECT ÎN ACŢIUNEA VIBRAŢIILOR ASUPRA ORGANISMULUI UMAN

This paper contains a short study regarding the correlation cause –
effect of the vibrations action on the humans. There are a lot of working staces
in which the vibrations produced by machine-tools act over the human bodies,
and is very important to know what is the effect inside the body of this action.
Cuvinte cheie: mediu de lucru, cauză – efect, vibraţii, handicap
Keywords: environment, cause – effect, vibration, disability

23 CORELAŢIA CAUZĂ – EFECT ÎN ACŢIUNEA


22-22 APLICAŢIE NUMERICĂ ŞI PROGRAM TURBO C AL METODEI GAUSS-JORDAN

The article presents the general notions and algorithm about the
Gauss-Jordan method. An eloquent example is given and the Turbo C program
illustrated this method. We conclude that we can obtain by this method the
determinant, by simple calculations and reducing the rounding errors
Cuvinte cheie: metoda Gauss-Jordan, matricea inversă, limbaj de
programare Turbo C, pivot
Keywords: Gauss-Jordan method, inverse matrix, Turbo C
programming language, pivotal

22 APLICAŢIE NUMERICĂ ŞI PROGRAM


22-21 DETERMINAREA ELIPSOMETRICĂ A GROSIMII ŞI A CONSTANTELOR OPTICE ALE FILMELOR SUPERFICIALE OPTIC ABSORBANTE

The paper presents a graphical method for the simultaneous
determination of thickness and optical constants of a superficial, optically
absorbent film. The data used have been obtained by ellipsometrical
measurements of a superficial layer of uneven thickness at several points.
The thickness and optical constants are determined for PMMA films
deposited on a copper surface highly polished.
Cuvinte cheie: constante optice, elipsometrie, film superficial, metodă
grafică
Keywords: optical constants, ellipsometry, surface film, graphical
method

21 DETERMINAREA ELIPSOMETRICĂ A GROSIMII ŞI A


22-20 ANALIZA FEM A SISTEMELOR DE IZOLARE SEISMICĂ CU SUPRAFAŢA DE ALUNECARE GENERATĂ DE FUNCŢII POLINOMIALE

Earthquake isolation systems are devices located at the base of
overhead structures (civil works), which have the goal to take off the oscillating
period of this compared with ground, during an earthquake and decrease the
transmitted energy using frictional dissipation. The results of the study
presented of this paper relieve the possibility of using sliding surfaces
generated by polynomial functions by using an intermediate neoprene element
between the sliding surface and the slider.
Cuvinte cheie: izolator seismic, pendul cu fricţiune, neopren, funcție
polinomială, analiză FEM
Keywords: seismic isolation, friction pendulum, neoprene, polynomial
function, FEM analysis

20 ANALIZA FEM A SISTEMELOR DE IZOLARE SEISMICĂ


22-19 SISTEME INOVATIVE DE IZOLARE SEISMICĂ BAZATE PE DISIPAREA ENERGIEI PRIN FRECARE. ANALIZA STATICĂ

Friction pendulums are used to reduce forces transmitted from the
ground to buildings, in order to diminish or avoid earthquakes loss, by
permitting relative displacements between the isolated structure and earth
during seismic actions. The result consists in reduced accelerations and
consequently reduced inertia forces. In this paper we present a new approach
regarding implementation of a friction pendulum having the sliding surface
profile based on a polynomial function of superior order. The new device
implies the use of an elastic element between the slider and the sliding surface.
Static and dynamic analyses performed using the finite element method
confirmed that the use of an elastomeric element is suitable for this purpose.
Cuvinte cheie: pendul cu fricţiune, suprafaţa de alunecare, funcţii
polinomiale, element elastomeric
Keywords: friction pendulum, sliding surface, polynomial functions,
elastomeric element

19 SISTEME INOVATIVE DE IZOLARE SEISMICĂ


22-18 ANALIZA IZOLATORILOR ELASTOMERICI UTILIZÂND METODA ELEMENTELOR FINITE

Modern design methods require in certain phases the use of finite
element analysis, which allows development of safe projects in terms of
structural strength and durability. Using this analysis in the design process
provides the following advantages: cost reduction and production design,
material economy, recognizing weaknesses, quality design and construction
optimization. The paper presents an innovative base isolation device based
with increased number of adjustable parameters, for which good simulation
results were obtained.
Cuvinte cheie: analiză, element finit, izolarea bazei, elastomer
Keywords: analysis, finite element, base isolation, elastomeric

18 ANALIZA IZOLATORILOR ELASTOMERICI


22-17 SISTEME INOVATIVE DE IZOLARE SEISMICĂ BAZATE PE DISIPAREA ENERGIEI PRIN FRECARE. MODEL ANALITIC

In this paper we present an innovative system for seismic isolation
based on frictional energy dissipation. While classical friction pendulum
bearings contain one or more cylindrical or spherical sliding surfaces, they
provide just pairs of two parameters controlling the dynamic behavior of a
structure isolated by this kind of device. In this paper we are implementing
friction pendulums having the sliding surface profile based on a polynomial
function of superior order. This seismic isolation system permit a greater
flexibility in controlling the oscillations of the upper structure, in terms of
displacements or dissipated energy, by using three parameters to control the
force-displacement relation.
Cuvinte cheie: pendul cu fricţiune, suprafaţa de alunecare, funcţii
polinomiale, energia disipată
Keywords: friction pendulum, sliding surface, polynomial functions,
disipated energy

17 SISTEME INOVATIVE DE IZOLARE SEISMICĂ BAZATE


22-16 CONSIDERAȚII PRIVIND CRITERIILE DE EVALUARE A REZISTENȚEI MATERIALELOR LA EROZIUNEA PRIN CAVITAȚIE

This paper presents the using criterions to estimate the behavior and
cavitațional resistance of materials. The materials were testing in laboratory
installations. Also are analyses how can it apply and calculate.
Cuvinte cheie: cavitație, rezistență, criteriu, parametru, viteza de
eroziune cavitațională
Keywords: cavitations, resistance criteria, parameters, cavitational
erosion rate

16 CONSIDERAȚII PRIVIND CRITERIILE DE EVALUARE


22-15 PROBE INDEX EFECTUATE PE HIDROAGREGATUL NR. 1 DIN CHE DĂIEŞTI ÎNAINTE ŞI DUPĂ LUCRĂRILE DE REPARAŢIE CAPITALĂ

The index tests performed to double regulated turbines are used to
determine operating characteristics, to check on cam operation, to check power
guarantee, the efficiency etc.
Cuvinte cheie: probe index, hidroagregat, turbină cu dublu reglaj,
randamentul turbinei, cădere, debit, aparat director, rotor
Keywords: index tests, hydro unit, double regulated turbine, turbine
efficiency, head, discharge, wicket gates, runner

15 PROBE INDEX EFECTUATE PE HIDROAGREGATUL


22-14 CENTRALĂ ELECTRICĂ HIDROPNEUMATICĂ ACŢIONATĂ DE VALURI

The paper analyses the wave energy capture and conversion with
hydro pneumatic equipments.
Main stages and activities of the project, results
a) A relevant study has been accomplished which analyzed the
hydro-meteorological conditions in the western Black Sea. Also it has been
made a documented presentation of the types of hydro plants suitable for
efficient conversion of wave energy in this area.
b) An experimental model of small-scale power plant driven by
waves has been designed and executed. Also, it has been performed
experiments on this model and on a specialized channel for wave simulation.
Hydropneumatic and energetic characteristics has been obtained and similarity
criteria for reporting results scale and choosing the best construction were
developed.
c) Building plans for a full scale hydro power plant were developed.
The generator which converts the wave energy into electrical energy was also
designed and made.
d) Experiments were conducted on a stand in a wind tunnel to test
the electrical generator, which required the devise and development of specific
support and aligning elements. The turbine was gradually loaded by connecting
to the shaft an electrical generator having a variable resistive load at output.
e) Determinations were performed in air velocity range of 5-20 m/s,
and characteristics of mechanical power have been extrapolated by specific
similarity criteria up to 50 m/s. It was concluded that the conversion unit is
compatible with a maximum power of 3.6 kW at an air velocity of 50 m/s
f) It has been developed technical documentation for construction
109
and assembly of micro hydro power plant.
g) There were carried out analytical calculations and computer
simulations to demonstrate the functionality of the model to illustrate the
phenomenology of the flow in the oscillating column, the dynamic behavior of
the turbine, and the correlation with experimental results.
Cuvinte cheie: microelectrocentrale, resurse regenerabile, conversia
energiei, valuri
Keywords: micro power plant, renewable resources, energy
conversion, wave

14 CENTRALĂ ELECTRICĂ HIDROPNEUMATICĂ


22-13 CONSIDERAŢII PRIVIND ADAPTAREA MODELULUI PRANDTL PENTRU O TURBINĂ DE VÂNT DE MICĂ PUTERE

At low power wind turbines blade end is free. The paper shows the
negative influences of finite span on performance profiles. It is made a critical
analysis of application Prandtl model for finite span wing at low power wind
turbines. The paper introduces a new method for calculating certain
adjustments based on Prandtl model.
Cuvinte cheie: turbine de vânt de mică putere, modelul Prandtl,
anvergura finită, coeficient de portanţă, coeficient de rezistenţă, coeficientul de
portanţă indus şi coeficientul de rezistenţă indus.
Keywords: low power wind turbines, Prandtl model, scale finite lift
coefficient, drag coefficient, lift coefficient and induced drag coefficient induced

13 CONSIDERAŢII PRIVIND ADAPTAREA MODELULUI


22-12 UNELE PARTICULARITĂŢI PRIVIND FENOMENELE AERODINAMICE ÎN JURUL CORPURILOR SUBŢIRI CARE ZBOARĂ ÎN ATMOSFERĂ

The paper presents a contribution to the aerodynamic body of
revolution movement trajectories in the thin atmosphere. As a particular case,
the paper refers to flying projectiles and missiles, to customize linearization
stationary movements around thin bodies of revolution.
Cuvinte cheie: proiectil, rachetă, potenţialul vitezelor, numărul Mach,
unghi de atac
Keywords: projectile, rocket, potential speed, Mach number, angle of
attack

12 UNELE PARTICULARITĂŢI PRIVIND FENOMENELE


22-11 UNELE PARTICULARITĂŢI PRIVIND MIŞCAREA FLUIDELOR PRIN EJECTOARE

This paper presents some features of evolutionary parameters on fluid
flow through the ejector gas dynamics. Ejectors are devices with wide
applicability gas dynamical in the technical field and especially in the military.
Cuvinte cheie: ejector, camera de amestec, parametri gazodinamici,
camera de amestec, coeficient de ejecţie, fluid antrenat, fluid de antrenare
Keywords: ejector, mixing chamber, gas dynamical parameters, the
mixing chamber, ejection coefficient, fluid driven fluid drive

11 UNELE PARTICULARITĂŢI PRIVIND MIŞCAREA


22-10 NOTE ASUPRA COMPORTĂRII UNEI AXE HIDRAULICE

The paper presents the components and the behavior of a hydraulic
axe, used to simulate the yaw mechanism of a wind turbine. Are presented,
synthetic calculations for sizing stand and the main experimental results
obtained. Has been carried out static and dynamic control and record the
results being achieved with the computer attached to the stand.
Cuvinte cheie: turbine de vânt, reglare, model matematic, încercări
statice, încercări dinamice
Keywords: wind turbine, control, mathematical model, static testing,
dynamic testing

10 NOTE ASUPRA COMPORTĂRII UNEI


22-9 COMPORTAMENTUL UNUI MICRO-HIDROAGREGAT CU TURBINĂ CROSS-FLOW DE 10 kW, ÎN FUNCŢIE DE UNGHIUL DE DESCHIDERE AL PALETEI DIRECTOARE, LA ACEEAŞI ÎNĂLŢIME DE CĂDERE A APEI

This paper presents the behaviour of a micro-hydro unit equipped with a
small cross-flow turbine (turbine calculated power is lass than PT=10 kW),
depending on the opening angle of the guiding paddle, at same amount of
water falling height. The tests and measurements were made at Hydro
Engineering SA Reşiţa hydraulic laboratories, with specialized equipment.
Cuvinte cheie: comportament, randament, 10 kW, unghi de deschidere,
paletă
Keywords: behaviour, output, 10 kW, opening angle, wide

9 COMPORTAMENTUL UNUI MICRO-HIDROAGREGAT


22-8 COMPORTAMENTUL UNUI MICROHIDRO-AGREGAT CU TURBINĂ CROSS-FLOW DE 10 kW, ÎN FUNCŢIE DE ÎNĂLŢIMEA DE CĂDERE A APEI, LA UNGHIURI DE DESCHIDERE ALE PALETEI CONSTANTE

This second paper presents the behaviour of a micro hydro unit
equipped with a small cross-flow turbine, depending on the height of fall of
water, at various opening angle of the guiding paddle. The tests and
measurements (as in the previously case) were made at Hydro Engineering SA
Reşiţa hydraulic laboratories, for several values of the height of fall of water.
Cuvinte cheie: comportament, randament, 10 kW, înălţimea de cădere,
paletă
Keywords: behaviour, output, 10 kW, falling height, palette

8 COMPORTAMENTUL UNUI MICROHIDRO-AGREGAT


22-7 CONTRIBUŢII ÎN CORELAREA PARAMETRULUI EROZIUNII CAVITAŢIONALE 1/MDPR CU PARAMETRII FUNCŢIONALI AI APARATULUI DE CERCETARE

Établir des relations pour permettre l`application des résultats des
testes d`érosion de la cavitation, d`un appareil a l`autre, représente une
continue préoccupation des chercheurs. À cet égard, l`ouvrage offre un model
de cet type de relation, mais qui, dans cette phase, permettre la corrélation
d`un petit nombre de matériaux, testé en Laboratoire de Machines
Hydrauliques de Timisoara, Gdansk et Michigan.
Cuvinte cheie: rezistența la cavitație, parametri aparat vibrator, relații
de corelare
Mots-clés: résistance à la cavitation, les paramètres des appareils
vibrants, des relations de corrélation

7 CONTRIBUŢII ÎN CORELAREA PARAMETRULUI


22-6 METODA ELEMENTULUI DE FRONTIERĂ CU ELEMENTE LINIARE, PENTRU O REŢEA AXIALĂ ÎN ”S” Partea I

This paper presents boundary element method (BEM), with linear
elements, for the numerical simulation of ideal incompressible fluid, for a
reversible cascade”S” axial profiles. BEM apply for Laplace’s equation
depending on flow and hydrodynamic field, speed and pressure are obtained,
inside of domain analysis.

Cuvinte cheie: elemente liniare, BEM, ecuaţia lui Laplace, puncte
unghiulare

Keywords: linear elements, BEM, Laplace equation, angular points

6 METODA ELEMENTULUI DE FRONTIERĂ CU


22-5 DECISION SUPPORT SYSTEM INTERFACE WITH BUSINESS INTELLIGENCE SOLUTION FOR ROMANIAN SMALL AND MEDIUM-SIZED ENTERPRISES

Globalization is a new challenge for small and medium-sized
enterprises. On one hand pose a threat, because new companies are going to
enter the domestic market, but, on the other hand, represent an opportunity to
enter the new emerging and growing markets.
In order to win this challenge SMEs must focus on the inter-network
connection; in fact, is well recognized that SMEs forming networks can improve
the efficiency and effectiveness absolutely necessary to win the globalization
battle.

Cuvinte cheie: SIAD, IMM, tablou de bord, indicatori economicofinanciari

Keywords: DSS, SME, dashboard, financial-economical indicators

5 DECISION SUPPORT SYSTEM INTERFACE WITH


22-4 CONSIDERATION ABOUT AERONAUTICAL MAINTENANCE AND SAFETY MANAGEMENT SYSTEM

The present paper regards elements about safety management
system and maintenance in civil and military aeronautical field. All organisations
must correlate the minimum risk with higher performance in their specific
activity.
Cuvinte cheie: de întreţinere, de gestionare a riscurilor, de siguranţă,
costuri
Keywords: maintenance, risk management, safety, costs

4 CONSIDERATION ABOUT AERONAUTICAL


22-3 ÜBER DIE INTERPOLIERBARKEITSABWEICHUNG DER KRAFTMESSBÜGEL

Utilizarea unui dinamometru la alte trepte de sarcină decât cele la care
a fost etalonat reclamă aplicarea metodei interpolării valorilor măsurate. În
lucrare se propun relații de definire a abaterilor de interpolabilitate aferente
acestui procedeu, cu aplicații la un set de 9 dinamometre ovale tip PGH.
Wenn Kraftmessbügel bei Werten verwendet werden die zwischen
den beim Eichen eingestellten Kraftstufen liegen, wird üblicherweise die
Methode des Interpolierens angewendet. In vorliegender Arbeit werden
Beziehungen für die Bestimmung der Interpolierbarkeitsabweichung
vorgeschlagen, die an Hand von Messungen an 9 ovalen Kraftmessbügel des
Typs PGH erläutert werden.

Cuvinte cheie: dinamometre1, interpolarea2 valorilor măsurate,
imprecizia metodei

Schlüsselwörter: Dynamometern, Interpolierung der messtechnischen Kenngrösse, Ungenauigkeit der Methode

3 ÜBER DIE INTERPOLIERBARKEITSABWEICHUNG


22-2 CONTRIBUTIONS TO DATA ACQUISITION AND CURRENTS AND VOLTAGES PROCESSING IN AN ENERGY MANAGEMENT SYSTEM

Articolul prezintă un sistem de achiziţie şi de prelucrare pentru tensiuni
şi curenţi de la o rețea electrică de joasă tensiune, o structură dezvoltată pentru
a fi integrată într-un sistem complex de gestionare a energiei.
Pentru a asigura o flexibilitate sporită, sistemul este modular şi este complet
personalizabil de software. Toate componentele sunt module compatibile, toate
semnalele de intrare/ieşire sunt standardizate (0 .. 100V AC, 0 .. 5A AC şi 4 ..
20 mA – semnal unificat). Toate modulele sunt interschimbabile, tipul de
configuraţie de intrare se introduce uşor prin aplicarea interfaței prietenoase.
Sistemul constă dintr-un set de semnal, un card de achiziţie de date şi un
calculator personal. Toate conditionat au ieşire în semnal unificat, şi placa de
achiziţie de date comunică cu computerul prin intermediul unui port serial
(RS232 sau în cazul în care există un risc ridicat de interferenţă, RS485). Pe
PC-ul se execută o aplicaţie cu interfaţă prietenoasă, responsabil de
configurarea sistemului şi de stocare a datelor.
Cuvinte cheie: achiziții de date, de semnal unificat, de control a
tensiunii
Keywords: data acquisition, unified signal, voltage monitoring

2 CONTRIBUTIONS TO DATA ACQUISITION AND


22-1 VISCOUS LIQUID THREE DIMENSIONAL FLOW THROUGH THE TURBO-MACHINES LABYRINTHS

In this paper we shall present such the numerical solving as the
experimental test of the viscous liquid three dimensional flow through the
clearance with and without baffle plate of the hydraulic turbo machine
labyrinths, considering the ring curvature by using the flow equations written in
the cylindrical trihedral coordinates.
We present also the stability of the numerical solution and the specific
boundary conditions to the posed problem, as well as the installation to
visualize the appearance of Sir Geoffrey Taylor’s whirls.
Cuvinte cheie: debit tridimensional, fluxurile de lichide vâscoase,
fluxuri hidraulice prin labirinturi/strângeri ale turbo-maşinilor
Keywords: three-dimensional flow, viscous liquid flows, flow through
the hydraulic turbo machine tightening labyrinths

1 VISCOUS LIQUID THREE DIMENSIONAL FLOW