2. Railway Wheel End Monitor Lay-Out & Status
BeWag AG Namur
Presented by:
Marc Petit – Railway Business Unit Manager
Date:
Title slide [Title Slide]
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3. Railway Wheel End Monitor (R-WEM) A New Tool for Kilometre Counting
Problem today:
Freight cars have today normally no integrated km counter.
New requirements about documentation of mileage of wheelsets result in the need of accurate knowledge of kilometre usage.
Therefore a new device has been developed which detects and counts electronically the wheelset revolutions for calculation and storage of km data.
Main Features:
Kilometre Counter.
Additional data storage for maintenance data of wheelsets.
Wireless data reading and downloading.

4. Functions of R-WEM Battery powered kilometer counter.
R-WEM has enough free memory in its processor for Extra Data:
Wheel manufacturer
Axle manufacturer
Serial number wheel / axle
Manufacturing date : wheels / axle / assembly
Maintenance operations : what / when / who
Extra inspections : what / when / who
Simple and easy data programming and downloading: R-WEM has a low power radio on board which is normally in ‘off’ mode.
This radio is switched on ONLY when data is downloaded resp. programmed in the workshop.

5. R-WEM Principle Sketch
R-WEM electronic is embedded in the central end cap hole.
The electronic part is fixed by screws to the locking plate.
An internal non rechargeable battery is used as power supply.
The battery can be used between -25°C and + 90°C (- 40°C under investigation).
Battery life is designed to be 8 years.

6. Problem: Wheelset Turning
During wheel reprofiling a free access to the centering hole in the axle journal is needed.
There is a potential risk of mixing and/or forgetting R-WEM during this operation.

7. Improved R-WEM Lay-Out Suitable for wheel turning lathes
The electronic is movable but still fixed to the endcap

8. Improved R-WEM Lay-Out Suitable for wheel turning lathes
Position of R-WEM when axle is ready for wheel turning

9. Improved R-WEM Lay-Out

10. R-WEM Installation into a Y25-Housing
RF frequency permeable plastic cover

11. Customer Values Cost Saving by:
Conveyor wheel
Cost Saving by:
Improved maintenance by change to km based.
Knowledge about km ‘consumption’ of leasing customers.
Simplified administration by electronic data storage.
Reading temperature history allows to plan maintenance.
©SKF
Slide 11 [Code]
SKF [Organisation]

12. R-WEM Status Status: Lay-Out already fixed. Laboratory tests ongoing.
Counting principle successfully tested.
First prototype under assembly.
First small series for field test available since end of 2010.

13. First Prototypes
Front Side
Rear Side
View from the side
Data Reader