WEG Roller Table Motors Presentation Rollertable Training English

8/10/2019 WEG Roller Table Motors Presentation Rollertable Training English

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WEG Smart SolutionsRoller Table motors

Cesar Augusto Hilbig

Diogo Abramo Casali

WEG Motores International Sales Dept


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1

Which Scenario Do We Have?

Roller Table Presentation (Ver. Jun/13/12)


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2

Which Failure We Prevent?Blocked bearings

Short circuit between phases

Corrosion in internal parts

Drag between rotor and stator



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3

WEG Smart Solutions = Roller Table Motor



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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.



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Roller Table Design OverviewFrame 132M up to 200

5 Roller Table Presentation (Ver. Jun/13/12)


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Roller Table Design OverviewFrame 225S M up to 400



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DE Dynamic W3 Seal - IP66

Vring seal inner

labyrinth ring

Labyrinth ring

Free volume fulfilled

with grease

Oring seal between shaft

and labyrinth ring



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Enshields Sealing

Oring seal between

motor frame and end

shield

Permatex on

joinseals to avoid

ingress of water and

dust

Regreasing systemFrame 225 and above (optional for 200 and below)

Extended joint

between bells and

frame



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Terminal Box Seal - IP66

Double CompressionCable Glands

6 Pin BMC

Terminal Block

Grounding lug inside terminal box

Double external grounding on motor frame

Detail of the drain

Metal drain



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Corrosion Resistant

High Quality

Polyurethane Top CoatThickness 240-340 m

Salt Spray 12000h

(C5 as per ISO 12944)

Epoxy Layer on

Internal Surfaces

(tropicalization)

Stainless Steel ShaftAISI/SAE 420



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Motor Frame

Radial fins avoid layer of

dust and/or water

accumulation on motor;



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Insulation System

100% Suitable for

VFD Stress Operation

WISE Generation III

Class 200C



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Torque & Power CharacteristicsFrame 132 to 225

Frequency (Hz)

Torque(Nm)

Po

wer(kW)



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Torque & Power CharacteristicsFrame 250 to 400

Frequency (Hz)

Torque(Nm)

Po

wer(kW)



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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 155C.



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Finance Advantage

Acquisition Cost

Maintenance / Energy Cost

Investment

Savings

ROL

LERTABLE

CHOICE

STANDAR

MOTORCH

OICE



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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



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Customers



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References


WEG Roller Table motors cut production stoppages & improve productivity for

GERDAU steel rolling mill plantWEG 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, Gerdaus 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

Gerdaus 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 WEGs 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 Gerdaus 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.
http://www.weg.net/uk/Media-Center/News/Products-Solutions/WEG-Roller-Table-motors-cut-production-stoppages-improve-productivity-for-GERDAU-steel-rolling-mill-plant


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Applications



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Applications



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Applications



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Merci

DankeGracias

Obrigado

Thank You



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Questions and suggestions, please contact WEG:

Cesar Augusto Hilbig ([email protected])

Diogo Abramo Casali ([email protected])

Contact

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WEG Roller Table Motors Presentation Rollertable Training English

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