Transcript POLYTECHNIC UNIVERSITY OF BUCHAREST MACHINE ELEMENTS

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