RoTech is a private spin off company from the Belgrade University. It is founded by Prof. Dr Aleksandar Veg and Mr. Aco Gobeljic, B.Sc.ME. The founders of the company have been actively involved with vibrodiagnostics, balancing and condition monitoring at the Mechanical Engineering Faculty of Belgrade since 1980. Both Gobeljic and Veg are still actively present at the Faculty of Mechanical Engineering, leading the research and development activities in related areas. Vibration control is a top expertise of RoTech. It involves a variety of measurements (temperature, parts shape and dimension, run out, misalignment, vibrations, acoustics, etc.), diagnosis, assessment, predictive and proactive maintenance, machinery protection, inspection and verification. RoTech itself, with a response time of few hours, serves for vibration control over 100 companies in a radius of 500 km around Belgrade. Some farther destinations are covered by RoTech representatives and visiting experts (Libya, Syria, Iraq, etc.). Vibration control is based on ISO recommended procedures and originally developed techniques. Instruments for site diagnosis are either of SKF origine (Microlog, Fixturlaser, Marlin …) or RoTech designed products (Vibrobalance, Rotobalance, Micro Mon, Dyna Log, Micro Mon+ …). Reporting and case studies of machinery health are based on RoTech methodology developed within decades of successful work. Conditional monitoring and modal testing of civil structures include: bridges, towers in electricity transmission lines, steel structures etc.

1. Top expertise in
Rapid Prototyping and Manufacturing
with spin off company
RoTech - University of Belgrade
Prof. dr. Veg Aleksandar
Conference on University and Business Cooperation in
Central Europe
(28th to 29th January 2016, Budapest, Hungary)

2. History of Machine and Mechanism
science at the University of Belgrade
• Among Distinguished Figures of IFToMM
• Concept of applied Science in Machine
Design and University Curriculum
• “hands on“ education
• Dissemination of TMM over territory of Ex
Yu and Serbia
• Army of students and doctoral students who
over took “Core Idea“
• Remarkable events in IFToMM History and
our role within it
• Regain of the JUToMM space
Prof. Todor Pantelić

3. • Walking devices
• Bakery line machine
• Packaging
• Machine Dynamics
Chair for the Theory of Machines and Mechanisms
Mechanical Engineering Faculty University of Belgrade
SCOPE OF EXPERTISE

4. Rehabilitation walking devices
Patent claim: П.2007/0229, WO/2008/145669, EP 2 170 241 B1

5. Bakery lines

6. Packaging

8. Machine Dynamics

10. RoTech
a spin off company of
Faculty of Mechanical Engineering
University of Belgrade
Entrepreneurship

11. www.rotech.rs
RoTech
Research and
Development
Measuring
systems
Machine
dynamics
Mechatronics
Design and
Engineering
Basic Design
Inspection and
Verification
Manufacturing
Balancing
machines
Vibro-
diagnostic
devices
Monitoring
systems
Service
Turbo
machinery
OVERHAUL
Balancing &
Vibrodiagno-
stics
Modal Testing
NDT Inspection
Alignment
Rapid
Prototyping
Turning
Gear
Orbit
Shaker
Training and
Education
Balancing
Vibrodiagnostics
Alignment
BDI
QMS ISO 9001:2008
SCOPE OF BUSINESS ACTIVITIES

12. Team members
Prof. Aleksandar Veg, PhD Sc. ME
General Manager
Aco Gobeljić, M. Sc. ME
Technical Director
Ass. prof. Goran Šiniković,
PhD Sc. ME
QMS Manager
Luka Andrejević,
M.Sc. EE
Devices and Monitoring Systems
Mladen Regodić,
M.Sc. ME
Devices and Monitoring Systems
Emil Veg,
PhD Sc. ME
Mechatronic Systems
Ass. prof. Raša Andrejević,
PhD Sc. ME
Research and Development
Vlastimir Tasić,
Service Manager
Mirela Rondović,
MSc. ME
Sales Manager
Ranđelović Jelena,
BA Economy
Administration
Karlo Puškarica, MSc
Programme Manager
BDI Dept.
Zdujić Dragan
Operater
Lukić Vitomir
Operater
Dragan
Operater

13. RANGE OF BALANCING MACHINES
HBM 100THBM 15
5 patent claims: П.21/88, П.313/93, П.314/93, П.315/93, П.2009/0205

14. VIBRO DIAGNOSTIC EQUIPMENT
Roto Balance
hand held battery operated field balancer
and spectrum analyzer
patent claim: П.2008-/0190

15. PROTOTYPES
Pro Level
accuracy of electronic leveling
0.001°
Micro Mon
multichannel data collector and analyzer

16. MicroMon+
condition monitoring instrument

17. SMALL AND MEDIUM SIZE ROTORS
Crank shaft (V engine) Hydro - Turbine Rotor
Centrifuge bottle - Belt drive Universal (cardan) shaft
Direct drive

18. BALANCING SERVICE – GIANT ROTORS
HBM 100T – Main Features
HARD BEARING concept
Max. rotor weight: 100 000 kg
Min. rotor weight: 500 kg
Max. rotor diameter: 3000 (4500) mm
Max. journal diameter: 500 mm
Min. journal diameter: 100 mm
Drive unit (soft start-up/coast down): 100 kW
Two measuring supports: MO1, MO2
Sensing elements: piezo-ceramic
Phase tracking: Incremental encoder
Machine weight: 10 000 kg
Patent claim: П.2009/0205

19. MAJOR OVERHAUL step by step review
US Steel Works Smederevo
Steam Turbine - Air Blower

20. NDT ISPECTION * ACTIVE PARTICLES POLARIZATION
* CRACK DETECTION – UV
* ULTRA SOUND DEEP SCAN

21. TURBINE BLADES
-modal testing-

22. GLAND machining
-balancing machine as a lathe machine-

23. BALANCING of the Blower rotor
In accordance
with
ISO 1940
Quality grade G 1.0

24. Alignment, Operational verification and
Reporting

26. Rehabilitation of the working space
floor vibrations in the control room
• Location: TPP Nikola Tesla
– TENT-B, Obrenovac
• ANSYS model
• Site measurements
• Redesign of pipeline
suspension
• Doctoral disertation

27. Modal analysis and strain
measurements on transmission tower
• Location: Podlog,
Slovenia
• ANSYS model
• On-site measurements
• Doctoral disertation

29. Dual approach:
Stage by stage balancing
Consecutive blading
and balancing (movie)
RoTech expertize
FLEXIBLE ROTOR BALANCING at low speed
(in compliance with ISO 11342)

30. • Petrochemical Industry, Pancevo, SRB
• HIP Fertilizer, Pancevo, SRB
• Oil Refinery, Pancevo, SRB
• US Steel Works, Smederevo, SRB
• Electric Power Plants Serbia, TENT, TEKO
• Nord Gas Company, Kirkuk, Iraq
• Oil Refinery, Bosanski Brod, BiH
• Electric Power Plants, TPP Bitola, Macedonia
• Electric Power Plants, TPP Ruse, Bulgaria
REFERENCES
Turbo-machinery overhaul

31. Rapid Prototyping
Turning Gear
Orbit Shaker
Patent claim: П.815/00

32. Walkaround
• Rehabilitation
walking device
Serbian patent claim: П.2007/0229
Publication no.: WO/2008/145669
European patent: EP 2 170 241 B1

33. Flowmeter for turbine inspection

34. Flowmeter acquisition system

35. Flowmeter acquisition system

36. Inspections and Monitoring of Civil Structures
(Consortium RoTech, SRB – FDSL, UK)
Expertise
 Vibration serviceability (Humans, traffic, etc.)
 Structural health monitoring and performance assessment
 Dynamic testing of full-scale structures
 Key UK group for vibration serviceability and dynamic testing
 Monitoring equipment manufacturing
 Wireless data transfer
 Site measurements
 3D Ansys Modelling

37. Monitoring system details Tamar bridge (UK)
• Environmental & structural monitoring (Fugro, 2001):
 Anemometers
 Fluid pressure based level sensing (rubbish)
 Temperature sensors (suspension cables, deck,
trusses)
 Strain gauges (stay cables)
 EDM between Towers (junk)

38. Monitoring system
• Dynamic monitoring system (VES, 2006):
 Uni-axial QA700 & QA750
accelerometers
 In perpendicular pairs on 4 stay cables
 3 (2 vertical + 1 transverse) on deck
• Robotic total station – RTS (VES, 2008):
 Leica total station on control room roof
 15 reflectors (deck, towers, abutments)

39. Promaen Belgrade
Joint Venture supported by Dutch Government
Engineering, Services and Consultancy
Project management
Contracting

40. Essentials
• Established in 2008 as a joint venture between Promaen Piping & Processinstalaties
B.V. from Duiven, The Netherlands and Rotech d.o.o. from Belgrade, Serbia
• General Manager: Prof. PhD Aleksandar Veg
• Quality Certifications: ISO 9001 (with Loyd since 2012)
• Since 2013 Promaen Balkan d.o.o. is part of Ludan Group
• Number of employees: 18
• Management: 2
• Piping Department: 15
• Civil & Structural: 1

41. Markets
• Oil and Gas
• Offshore
• Tank Terminals
• Food & Pharma
• Water Treatment
• Waste to energy

42. Engineering Tools:
• Piping:
• PDMS (Plant Design Management System)
• Auto Plant
• Plant 3D
• AutoCAD
• Cesar II
• Civil & Structural:
• PDMS
• Pro Structures
• Tekla Structures
• AutoCAD
• STAAD Pro
• AutoCAD

43. References:
• SBM Offshore – Gusto MSC
FPSO Cidade de Paraty (10.000 eh)
• Design of Upper deck, cargo piping and pipe room piping
• Design and engineering of pipe support structures
• Design and engineering of 4 topside structures (total 150 tons)
• SBM Offshore – Schiedam
FPSO Cidade de Ilhabela (18.000 eh)
• Design of Upper deck piping
• Design and structural check of pipe support structures
• SBM Offshore – Monaco
FPSO Cidade de Marica and FPSO Cidade de Saquarema (21.000 eh)
• Design of upper deck piping
• Design of pipe support structures

45. Renowned RoTech partners and clients

46. Thank you!