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FUCHS LUBRITECH GMBH
Noise Reduction in the Wheel/Rail-System by
Application of Rail Head Treatment Products
Tramway-Seminar
Tours, France, 18.-19. November 2002
Updated version of the paper
presented on behalf of the
4th Rail Vehicle Conference,
Dresden, Germany, 18.-20. October 2000
Dipl.-Ing. Harald Willrich
FUCHS LUBRITECH GmbH, D-67685 Weilerbach
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FUCHS LUBRITECH GMBH
Noise Reduction in the Wheel/Rail-System by
Application of Rail Head Treatment Products
Content:
 Problem
 Application
 Reasons
 Consumption quantities
 Solution
 Results
 Products
 Conclusions
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FUCHS LUBRITECH GMBH
Problem:
 „Wheel Squeal“ when travelling through curves
 Disturbing noises with high frequencies
 Molestion of people living near the track
 high costs for noise preventing measures
 additionally: wear on wheels and rails
 Keyword: corrugation
 costs for maintenance of vehicles and track
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Reason:
 different distances for inner and outer wheel when
travelling through narrow curves, which cannot be
egalized by the different rolling radii
 distorsion of the axles
 differential longitudinal creep forces
 Stick-slip-Effects, normally on the low rail
 also lateral creep forces
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Solution:
 steered wheel sets: better adaptation of the bogie axles
to the curve radius
 disadvantage: high costs, reduces only wheel flange wear
 Single wheel suspension: nearly no longitudinal creep
forces, but higher lateral creep forces
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Solution:
 Noises are produced in the Wheel/rail contact area
 Countermeasures have to be set exactly there
 Rail Head Treatment with appropriate products
 Braking and Traction forces have to be maintained
 Transmission of electric signals must not be influenced
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Products:
TRAM-SILENCE TRAM-SILENCE
00
Base oil:
native
synthetic
Thickener:
Ca-soap
inorganic
Solids:
Metal powder, Graphite
Properties:
- biodegradable
- very adhesive
- extremly pressure
resistant
- wide temperature
range
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- constant friction
coefficient
- wear reducing
- good corrosion
protection
- water resistant
FUCHS LUBRITECH GMBH
Sprayability of TRAM-SILENCE 00:
relative spray rate [%]
120
100
20°C
0°C
-10°C
-15°C
-20°C
80
60
40
20
0
Beka Fluilub
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Rebs
Vogel SP 9
FUCHS LUBRITECH GMBH
Sprayability of TRAM-SILENCE 00:
System: Beka Fluilub
System: Rebs
+20°C
0°C
-10°C
-20°C -15°C
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Friction coefficients:
Tannert-test:
no Stick-slip, constant level
of friction after running-in
friction value 0,085 resp. 0,143
Almen-Wieland-test:
Scuffing load > 18 kN
friction value 0,144 resp. 0,140
SRV-test:
constant friction level
friction level 0,124 resp. 0,138
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Friction coefficients:
Tannert-test
TRAM-SILENCE
TRAM-SILENCE 00
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Consumption quantities:
 As much as necessary, as few as
possible
 manual application: „depending
on local conditions“, Spots of
lubricant in a distance of 1-2 m,
beginning 10-20 m before the
curve starts
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Consumption quantities:
 Track-side systems:
Qunatity is normally
determined by the
lubricator, appr. 1 g per
cycle, split on several
outlets, controlling by
activation of the lubricator
 On-board systems:
depending on local
conditions quantities
between 10 and 100 mg
per meter of track
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Consumption quantities
 Depending on local
conditions, for examples
curve radius, condition of
wheel and rail, weather etc.
 Braking behaviour, traction
and train detection must not
be influenced
 No risk for individual traffic
crossing the track
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Results
When applied properly, all requirements are fulfilled:
 Braking distance is not increased
 Traction is maintained
 Signalling is not affected
 No influence on isolating joints
 Wheel squeal is dramatically reduced
 wear is reduced
 Individual traffic is not endangered
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Results
Excerpt from an test report of Dutch Railway NS about
TRAM-SILENCE:
“In the quantities tested in this examination (0,04 g/m und
0,1 g/m) the product is safe. Braking behaviour is not worse
than on wet rails and detection behaviour is ok. The noise
reducing effect could be proved. With the used WOERNERlubricator the product could be applied reproducable.”
Amsterdam 1998
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Results
Excerpt from an test report of Hamburger Hochbahn AG
(Metro Hamburg) about TRAM-SILENCE:
“When using TRAM-SILENCE as a top-of-the-rail wetting
agent and observing certain boundary conditions, the
braking distances do not exceed the limit values according
to BOStrab (German Tramway Guidelines).“
Hamburg, 2000
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Results
Remarkable reduction of squealing noise
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Conclusion
 Application will be done more and more by means of
automatic lubricators.
 In the meantime a number of appropriate lubricators are
available.
 Selection of the most suitable system depends on local
conditions.
 Optimum consumption rates have to be found by field tests.
 Further investigation on the corrugation problem
 Wheel-squeal should no longer be a problem!
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Thank you very much for your attention
www.fuchs-lubritech.de
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