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TRANSCRIPT
WEG Smart Solutions
Roller Table motors
Cesar Augusto Hilbig
Diogo Abramo Casali
WEG Motores – International Sales Dept
2
Which Failure We Prevent? Blocked bearings
Short circuit between phases
Corrosion in internal parts
Drag between rotor and stator
Roller Table Presentation (Ver. Jun/13/12)
4
Roller Table Advantages
Extended lifetime in constant work
Speed variation through VFD
Constant torque with no ventilation
Robust design suitable to the lamination
conditions.
Roller Table Presentation (Ver. Jun/13/12)
DE Dynamic W3 Seal - IP66
V’ring seal inner
labyrinth ring
Labyrinth ring
Free volume fulfilled
with grease
O’ring seal between shaft
and labyrinth ring
7 Roller Table Presentation (Ver. Jun/13/12)
Enshields Sealing
O’ring seal between
motor frame and end
shield
Permatex on
joinseals to avoid
ingress of water and
dust
Regreasing system Frame 225 and above (optional for 200 and below)
Extended joint
between bells and
frame
8 Roller Table Presentation (Ver. Jun/13/12)
Terminal Box Seal - IP66
Double Compression
Cable Glands
6 Pin BMC
Terminal Block
Grounding lug inside terminal box
Double external grounding on motor frame
Detail of the drain
Metal drain
9 Roller Table Presentation (Ver. Jun/13/12)
Corrosion Resistant
High Quality
Polyurethane Top Coat
Thickness 240-340 µm
Salt Spray 12000h
(C5 as per ISO 12944)
Epoxy Layer on
Internal Surfaces
(tropicalization)
Stainless Steel Shaft
AISI/SAE 420
10 Roller Table Presentation (Ver. Jun/13/12)
Motor Frame
Radial fins avoid layer of
dust and/or water
accumulation on motor;
11 Roller Table Presentation (Ver. Jun/13/12)
Insulation System
100% Suitable for
VFD Stress Operation
WISE Generation III
Class 200°C
12 Roller Table Presentation (Ver. Jun/13/12)
Torque & Power Characteristics Frame 132 to 225
Frequency (Hz)
To
rqu
e (
Nm
) P
ow
er
(kW
)
13 Roller Table Presentation (Ver. Jun/13/12)
Torque & Power Characteristics Frame 250 to 400
Frequency (Hz)
To
rqu
e (
Nm
) P
ow
er
(kW
)
14 Roller Table Presentation (Ver. Jun/13/12)
15
Product Scope
Frames from 132 up to 400;
ZZ bearings up to frame 200;
Protection degree IPW66;
Sintered metal drain;
Exclusive W3 labyrinth seal;
Terminal block BMC;
Shaft threaded center hole;
Stainless steel nameplate;
Polyurethane top coat (212P);
Insulation class H;
Mounting B3 up to 200 & B3T from 225 to 400;
Thermal protection PTC 155°C.
Roller Table Presentation (Ver. Jun/13/12)
16
Finance Advantage
Acquisition Cost
Maintenance / Energy Cost
Investment
Savings
RO
LL
ER
TA
BL
E C
HO
ICE
STA
ND
AR
MO
TO
R C
HO
ICE
Roller Table Presentation (Ver. Jun/13/12)
A Straightforward Solution
Direct Drive
No transmission loss
No transmission maintenance
No transmission failure
No loss due ventilation system
No fan and fan cover damage
No control devices for auxiliary motor
Natural
Cooling
ROLLER TABLE
CONVENTIONAL SOLUTION
17 Roller Table Presentation (Ver. Jun/13/12)
19
References
Roller Table Presentation (Ver. Jun/13/12)
WEG Roller Table motors cut production stoppages & improve productivity for
GERDAU steel rolling mill plant WEG Roller Table motors are overcoming adverse operating conditions to provide improved productivity and reliability, and substantial energy
savings at the GERDAU steel rolling mill plant in Brazil.
Rolling steel is a tough process, the rolling machines being subjected to aggressive conditions such
as high temperatures, severe mechanical impacts and permanent contact with water.
The machines need, therefore, to rely on high technology, highly resistant
components to withstand the tough working conditions, and avoid the unplanned
production outages that result in financial losses. For example, Gerdau’s steel mill
produces 12- thousand tons of rolled steel per month, an unexpected 2- hour
interruption in the production process, would result in the loss of 120-tons of rolled
steel.
Unfortunately, production outages were a common problem for GERDAU, as the
majority of motors installed in the plant were quite old and did not provide the
necessary features to sustain reliability. In particular, the motors were not equipped
with adequate shaft sealing systems. This allowed water to penetrate into the motor
bearings, shortening their life.
To solve this problem, the existing motors have been replaced by new, high
technology Roller Table motors, designed and manufactured by WEG based upon
Gerdau’s requirements. These motors ensure higher productivity, improved
efficiency and deliver lower maintenance costs.
The Roller Table motors are designed with features that enable them to operate with
complete reliability, despite contact with corrosive agents, such as water, steam,
dust, high temperatures, and despite being subjected to a high number of start-ups
and frequent rotation reversals. The features include radial fins, and IPW66 degree
of protection, together with WEG’s innovative W3Seal sealing system for added
protection against water ingress.
Since the Roller Table motors were delivered, in late 2008, they have proved
themselves, performing reliably and fully meeting Gerdau’s expectations. As a
result, Gerdau is benefiting from far greater certainty in its operations, because the
company no longer faces the previous production shut-downs resulting from
electric motor failures.
ありがとうございます。
سكرا
谢谢
Merci नमसत Danke
Gracias
Спасибо
Obrigado
Thank You
23 Roller Table Presentation (Ver. Jun/13/12)
Questions and suggestions, please contact WEG:
Cesar Augusto Hilbig ([email protected])
Diogo Abramo Casali ([email protected])
24
Contact
Roller Table Presentation (Ver. Jun/13/12)