FUCHS LUBRITECH GMBH Tram-Seminar, Tours, 18.-19.11.2002 / 1 Noise Reduction in the Wheel/Rail-System by Application of Rail Head Treatment Products Updated

FUCHS LUBRITECH GMBH

Tram-Seminar, Tours, 18.-19.11.2002 / 1

Noise Reduction in the Wheel/Rail-Noise Reduction in the Wheel/Rail-System by Application of Rail Head System by Application of Rail Head

Treatment ProductsTreatment Products

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

Tramway-SeminarTramway-SeminarTours, France, 18.-19. November 2002Tours, France, 18.-19. November 2002



Noise Reduction in the Wheel/Rail-System by Noise Reduction in the Wheel/Rail-System by Application of Rail Head Treatment ProductsApplication of Rail Head Treatment Products

Content:

Problem

Reasons

Solution

Products

Application

Consumption quantities

Results

Conclusions



Problem: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



Reason: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



Solution: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



Solution: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



Products:Products: TRAM-SILENCETRAM-SILENCE TRAM-SILENCE TRAM-SILENCE 0000

Base oil: native synthetic

Thickener: Ca-soap inorganic

Solids: Metal powder, Graphite

Properties:

- biodegradable

- very adhesive

- extremly pressure resistant

- wide temperature range

- easy to apply

- constant friction coefficient

- wear reducing

- good corrosion protection

- water resistant



Sprayability of TRAM-SILENCE 00:Sprayability of TRAM-SILENCE 00:

0

20

40

60

80

100

120

Beka Fluilub Rebs Vogel SP 9

rela

tive

spra

y ra

te [%

]

20°C0°C-10°C-15°C-20°C



Sprayability of TRAM-SILENCE 00:Sprayability of TRAM-SILENCE 00:

+20°C

0°C

-10°C

-20°C -15°C

System: Beka Fluilub System: Rebs



Friction coefficients:Friction coefficients:

Tannert-test: no Stick-slip, constant level of friction after running-infriction value 0,085 resp.

0,143Almen-Wieland-test:

Scuffing load > 18 kNfriction value 0,144 resp. 0,140

SRV-test: constant friction levelfriction level 0,124 resp. 0,138



Friction coefficients:Friction coefficients:Tannert-test

TRAM-SILENCE

TRAM-SILENCE 00



Consumption quantities: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



Consumption quantities: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



Consumption quantitiesConsumption 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



ResultsResults

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



ResultsResultsExcerpt 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 WOERNER-lubricator the product could be applied reproducable.” Amsterdam 1998



ResultsResultsExcerpt 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



ResultsResults

Remarkable reduction of squealing noise



ConclusionConclusion

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!



Thank you very much for your attentionThank you very much for your attention

www.fuchs-lubritech.dewww.fuchs-lubritech.de

Documents

FUCHS LUBRITECH GMBH Tram-Seminar, Tours, 18.-19.11.2002 / 1 Noise Reduction in the Wheel/Rail-System by Application of Rail Head Treatment Products Updated