1/14 April 2004 MACHINE ELEMENTS & TRIBOLOGY POLYTECHNIC UNIVERSITY OF BUCHAREST MACHINE ELEMENTS &...
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Transcript of 1/14 April 2004 MACHINE ELEMENTS & TRIBOLOGY POLYTECHNIC UNIVERSITY OF BUCHAREST MACHINE ELEMENTS &...
April 2004 MACHINE ELEMENTS & TRIBOLOGY 1/14
POLYTECHNIC UNIVERSITY OF BUCHAREST
MACHINE ELEMENTS & TRIBOLOGY
(OMTR)
CG Building - Spl. Independentei 313, 060042 Bucharest
www.omtr.pub.ro
April 2004 MACHINE ELEMENTS & TRIBOLOGY 2/14
UPB
Faculty of Mechanical Engineering
(FIM)
12 Faculties in UPB
Department of
MACHINE ELEMENTS AND TRIBOLOGY
HEAD: Prof. Mircea D. PASCOVICI
7 Professors (5 PhD advisors)
14 Associate Professors
7 Assistant Professors (Lecturers)
4 Assistants
6 + 12 PhD students
2 Technicians + 2 Secretaries
6 Departments in FIM
April 2004 MACHINE ELEMENTS & TRIBOLOGY 3/14
CENTRE FOR EXCELLENCE IN MECHANICAL ENGINEERING AND TRIBOLOGY
CNCSIS - ACCREDITATION
Chairman: Prof. Mircea D. PASCOVICI
Executive Manager: Assoc. Prof. Adrian PREDESCU
Research
LABORATORIES (Teams)
Tribology
Mechanical transmissions
Computer assisted mechanical engineering
Department of
MACHINE ELEMENTS AND TRIBOLOGY
HEAD: Prof. Mircea D. PASCOVICI
Education
Undergraduate courses inMachine elements and Mechanisms
Tribology
Management in Mechanical Engineering
IT basis for Mechanical Engineering
Postgraduate courses for
CAD-CAE in Mechanical Engineering
Biomedical Engineering
April 2004 MACHINE ELEMENTS & TRIBOLOGY 4/14
Thermo-hydro-dynamic lubrication studies with application to various machine elements
LUBRICATION
Viscous Dampers & Vibrators
Viscous Pumps
Hydrodynamic Bearings Seizure, Optimal filter size, Oil contamination
Viscous Couplings Thermal transients regime for automotive transmissions
Seals (Mechanical Face Seals, Brush Seals)
TEHD Instabilities, Phase change Temperature measurements by infrared Thermography (LMS-Poitiers)
IR CameraImage processing unit
Thermocouple
Feeding arm
Bellows
Stator
Rotor
Mirror
Mirror
CarbonRotor
FluorineStator
Infraredcamera
ReferenceBlack Target
TRIBOLOGY Laboratory
April 2004 MACHINE ELEMENTS & TRIBOLOGY 5/14
LUBRICATION OF TEXTURED SURFACES
ua
Rigid Disc
Fluid
W
V
R
hg
hh0
r dr
h
hp
he
Porous &elastic layer
Rigid support
LUBRICATION OF CONFORMAL, LAYERED, COMPLIANT AND POROUS CONTACTS
TRIBOLOGY Laboratory
April 2004 MACHINE ELEMENTS & TRIBOLOGY 6/14
Test rigs
TIMKENLinear contact machine
CSM-CALOWEAR & PLINT TE-66Spherical abrasion tester
AMSLERTwo roller machine
MYTUTOYO Roughness measurement
Stick-slip machine
Four ball machine
Research subjects
•Friction and wear processes and phenomena
•Tribological properties of coating materials
•Mechanical properties of lubricants
•Reliability and durability of mechanical components
•Tribology of human joint replacements
•Tribological behaviour of materials in dry and boundary
friction
TRIBOLOGY Laboratory
April 2004 MACHINE ELEMENTS & TRIBOLOGY 7/14
Tribology of human joint replacements
TRIBOLOGY Laboratory
April 2004 MACHINE ELEMENTS & TRIBOLOGY 8/14
TRIBOLOGY Laboratory
USA
Universities fromPITTSBURGH, CARBONDALE
& BATON ROUGE
Prof. Michael M. KHONSARY
ISRAEL
TECHNION - Israel Institute of Technology
Prof. Itzak ETSION
JAPAN
University ofKOBE
Prof. T. IWATSUBO
FRANCE
Laboratoire de Mecanique et AcoustiqueUniv. de la Mediteranee Aix-MarseilleProf. Patrick CHABRAND
Laboratoire de Mecanique des SolidesLMS- Universite de Poitiers
Prof. Jean FRENE Prof. Dominique Bonneau (Angouleme)
Tribology Laboratory
April 2004 MACHINE ELEMENTS & TRIBOLOGY 9/14
MECHANICAL TRANSMISSIONS
RELIABILITY AND DURABILITY
VIBRATION AND NOISE
Gears and gearboxes Measurements & Analyses
Solutions for noise reduction
LOAD CAPACITY
Gears, couplings Theoretical studies
Experimental studies
PRODUCT DEVELOPMENT
Various machine elements Damage accumulation model
Real loading model
Modeling S-N (Wöhler) curves
International cooperation
COPERNICUSSCOPES
Belgium
Italy
Hungary
Slovenia
Switzerland
Various machine elements Flexible product development
April 2004 MACHINE ELEMENTS & TRIBOLOGY 10/14
2 fzF=1200
2 fzF + faI = 1230
2 fzF - faI = 1170 fzF + faI = 630
920
2 fzIII = 640
1075
fzF = 600
fzIII = 320
faI = 28,8
2 faI = 57
3 faI = 88
1000 1500 500 0 f [Hz]
Acc
élér
atio
n re
lativ
e de
s vi
brat
ions
(lo
g) a
Vibration spectrum at gearbox AK6
N2
1
2
3
4
5
4
3
2
5
1
S-N curves
t N1 N4 N' 1 N' 3 N' 2 N3 N5 n
Damage accumulation process
800 750
700
650 600 6
550
500
450 400
2·104 105 106 5·106 107 N[cicluri]
Flim
[MP
a]
Pr=10% Pr=50%
Pr=90%
Experimental S-N (Wöhler) curves
Buckling analysis at membrane flexible couplings
MECHANICAL TRANSMISSIONS
April 2004 MACHINE ELEMENTS & TRIBOLOGY 11/14
Modern telemetry system for measurement vibrations and real loading
Modern system for performing real-time noise analysis (B & K 2260 Observer)
Modern equipments
MECHANICAL TRANSMISSIONS
April 2004 MACHINE ELEMENTS & TRIBOLOGY 12/14
Hardware
38 PC (P-III & P-IV)
Colour Plotter
SmartBoard
Mechanical Engineering software
I-DEAS AutoCAD
CADdy ADAMS
COSMOS FLUENT
MathCAD Visual C
Computer assisted mechanical engineering
April 2004 MACHINE ELEMENTS & TRIBOLOGY 13/14
Nonlinear FE modelling of interference joints
Computer assisted mechanical engineering
April 2004 MACHINE ELEMENTS & TRIBOLOGY 14/14
Electronic packaging Cooling modelling of personal computers
Computer assisted mechanical engineering