EP2865578A1 - Poutre-frein à réduction d'émissions sonores pour freins de voie électrodynamiques - Google Patents

Poutre-frein à réduction d'émissions sonores pour freins de voie électrodynamiques Download PDF

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Publication number
EP2865578A1
EP2865578A1 EP20140003550 EP14003550A EP2865578A1 EP 2865578 A1 EP2865578 A1 EP 2865578A1 EP 20140003550 EP20140003550 EP 20140003550 EP 14003550 A EP14003550 A EP 14003550A EP 2865578 A1 EP2865578 A1 EP 2865578A1
Authority
EP
European Patent Office
Prior art keywords
brake
sound
brake beam
braking surface
electrodynamic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP20140003550
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German (de)
English (en)
Other versions
EP2865578B1 (fr
Inventor
Dietmar Becker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FEW Fahrzeug- und Entwicklungswerk Blankenburg GmbH
Original Assignee
FEW Fahrzeug- und Entwicklungswerk Blankenburg GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by FEW Fahrzeug- und Entwicklungswerk Blankenburg GmbH filed Critical FEW Fahrzeug- und Entwicklungswerk Blankenburg GmbH
Publication of EP2865578A1 publication Critical patent/EP2865578A1/fr
Application granted granted Critical
Publication of EP2865578B1 publication Critical patent/EP2865578B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
    • B61K7/00—Railway stops fixed to permanent way; Track brakes or retarding apparatus fixed to permanent way; Sand tracks or the like
    • B61K7/02—Track brakes or retarding apparatus
    • B61K7/10—Track brakes or retarding apparatus electrodynamic

Definitions

  • the invention is based on a sound emission-reduced brake beam of electrodynamic rail brakes, according to the preamble of claim 1.
  • Electrodynamic rail brakes represent a proven and widespread design for this purpose.
  • the functional principle of the electrodynamic track brake which is sometimes referred to as eddy current track brake, based on the fact that a substantially U-shaped trough made of ferromagnetic material, each rail from below engages.
  • eddy current track brake With the help of electrically flowed coil windings, which are arranged in the space between rail and trough, a magnetic field is induced in the U-shaped trough, so that an open magnetic circuit is formed, wherein the free ends of the two legs of the U-shaped trough magnetic pole faces form.
  • translationally movable brake beams are mounted, the sliding surfaces on the trough To reduce wear and to allow the closing of the brake without a wheel at regular intervals must be lubricated.
  • the brake beams are displaceable only in the transverse direction to the rail longitudinal axis.
  • the brake beams are arranged so that the opposing brake beams each form a brake groove through which each rolling on the associated rail track wheel of a rail vehicle must pass.
  • the brake beams are applied or pressed against the wheel of the rail vehicle by the action of magnetic forces.
  • the hardness of the braking surface is set approximately equal to the hardness of the wheel. This is usually accomplished by applying a hard facing layer of the appropriate hardness to the braking surface of the standard structural steel (St37-2) brake beam.
  • a track brake for rail vehicles which consists of a plurality of elongated brake pads, which are fixed at a distance one behind the other on a continuous brake beam by means of bolts.
  • the rail wheel facing surface of the brake pads is referred to as a braking surface and consists of a matrix material, eg. B. in the form of a cast body of nodular graphite.
  • abrasion-generating material such as cylindrical bolts of sintered ceramic, inserted, for example, pressed into blind holes.
  • the unpleasant high-frequency brake noises are considerably reduced by the abrasion particles generated by the braking action between the brake surface and the rail wheel.
  • the coefficient of friction is increased by the abrasion particles, which leads to a better braking performance of the track brake ( DE 10 2011 115 089 A1 ).
  • the disadvantage of this invention is that special inserts are required for sound reduction, which form an intermediate layer between rail wheel and braking surface. Apart from the fact that abrasion always represents an environmental impact, the abrasion must be firmly pressed into the braking surface of the brake pads, which requires an increased production cost.
  • Each brake beam has a U-profile which is open towards the vehicle wheels to be braked and which is subdivided by webs into a multiplicity of chambers adjoining in the longitudinal direction of the brake beam.
  • a wear element is floatingly mounted by means of a pocket enclosing this on all sides and projects out of the chambers.
  • the bags themselves consist of a vibration-damping material, such as rubber, certain plastics or foams.
  • Each wear element is together with its pocket over at least one bolt held, which is passed through at least one leg of the U-profile and protrudes at least into the wear element.
  • the recess in the wear element for receiving the bolt is formed without contact to the wear element ( DE 39 30 332 A1 ).
  • a direct connection of the vibration damping material with the brake beam is known in a track brake, in which on the brake bar at a distance segments behind each other are arranged as brake pads.
  • the brake pads are incorporated in recesses of the brake beam, which are separated by extending transversely to the longitudinal axis of the brake beam webs, positively mounted and secured by means of bolts.
  • the segments are formed as sandwich segments having at least two horizontal, superposed layers of mutually different material.
  • the individual layers can z. B. from a shell made of steel and a lower part also made of steel.
  • the middle layer located between the upper and lower part can, for.
  • As plastic iron, iron alloys, non-ferrous metals, sintered metals, ceramics or an organic material ( CH 634 514 A5 ).
  • the sandwich construction described in this publication is not stable enough from a mechanical engineering point of view, since the clamping of materials of lower compressive strength in a screw connection only allows low biasing forces and also quickly loss of bias occurs by settlement.
  • the components of the sandwich brake pads which have a lower modulus of elasticity, ie have plastic or quasi-elastic properties, give way to the pressure of the screw connection so that it loosens and, in turn, the brake noises become louder due to the resulting vibrations.
  • each sandwich segment existing two joints between the different materials favor the settling phenomena.
  • a major disadvantage is also an increased manufacturing and assembly costs of sandwich brake pads. They must be made exactly according to the length of the recesses of the brake beam and also be connected by several screw with the brake beam.
  • the sound emission-reduced brake beam according to the invention with the features of claim 1 can be produced much easier than the known from the prior art beam track brakes on which brake pads or blocks are attached to receive the sound-absorbing materials. This is achieved in that the extending in the longitudinal direction of the brake beam sound-absorbing liner with high internal damping is introduced directly into the body of the brake beam of the braking surface ago. For this purpose, a slot, for example by milling, incorporated in the body of the brake beam. Subsequently, the sound-insulating insert is introduced into the resulting groove. The fact that the main body of the brake beam is only grooved and the insulating material is pressed into these grooves, eliminating the above-mentioned additional parts for receiving the deposits and any screw.
  • the main body of the brake beam itself absorbs the sound-insulating insert in its interior.
  • the production of the brake beam is much easier and therefore cheaper.
  • the existing between the upper and lower "lamella" of the brake beam sound bridges for the brake noise development of minor importance, since the close arrangement of the damping material to the location of the vibration excitation, namely the braking surface causes effective damping.
  • the damping material is not interrupted by parts or fasteners of the rail track brake, so that it is effective as a compact, uninterrupted deposit.
  • the damping material does not touch the wheel to be braked, whereby, apart from the abrasion generated during the braking process itself, additional abrasion is avoided.
  • the sound-insulating insert is integrally formed.
  • a one-piece insert is easier to introduce and fasten in the body of the brake beam.
  • the insert consists of several closely spaced sections. Due to their elasticity, their contact surfaces are pressed close to each other in the installed state, so that they act more or less like an uninterrupted insert.
  • the sound-insulating insert is frictionally secured in the elaborate groove of the brake beam, for example, pressed.
  • This simple technology achieves an even more cost-effective production of the brake beams.
  • the sound-absorbing insert is made of an elastomer.
  • the properties of the elastomer are chosen so that an intimate connection, similar to a vulcanization, takes place with the metal surface in the groove, whereby the damping material safely remains in the groove regardless of the vibration stress and not outward toward the braking surface emigrated.
  • the sound-insulating insert made of a rubber having a hardness of 50 to 55 Shore (A).
  • Fig. 1 shows a brake beam 1 in a standing position with a braking surface 2, in which a groove 3 is introduced, which is filled with an elastomer 4 as a sound-insulating insert.
  • the braking surface 2 is formed by a buildup weld 5.
  • Fig. 2 shows the brake bar in section.
  • the width of the groove 3 is 20 to 25% of the brake beam thickness, their depth 50 to 60% of the brake beam width.
  • the sound-insulating insert 4 does not protrude up to the braking surface 2, but ends before the build-up welding 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)
EP14003550.2A 2013-10-18 2014-10-17 Poutre-frein à réduction d'émissions sonores pour freins de voie électrodynamiques Not-in-force EP2865578B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013017316 2013-10-18

Publications (2)

Publication Number Publication Date
EP2865578A1 true EP2865578A1 (fr) 2015-04-29
EP2865578B1 EP2865578B1 (fr) 2016-10-05

Family

ID=51752970

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14003550.2A Not-in-force EP2865578B1 (fr) 2013-10-18 2014-10-17 Poutre-frein à réduction d'émissions sonores pour freins de voie électrodynamiques

Country Status (2)

Country Link
EP (1) EP2865578B1 (fr)
DE (1) DE102014015334A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017200811B3 (de) 2017-01-19 2018-06-28 Db Netz Ag Elektrodynamische Gleisbremse
CN111780913B (zh) * 2020-06-29 2022-05-13 中车株洲电力机车有限公司 一种磁轨制动器吸力测试系统及方法
CN115026518B (zh) * 2022-06-28 2024-03-22 天津铁科铁路信号有限公司 一种车辆减速器制动钳加工方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US206738A (en) * 1878-08-06 Improvement in railroad-rails
FR2254467A1 (fr) * 1973-12-15 1975-07-11 Thyssen Huette Ag
CH634514A5 (de) 1978-11-16 1983-02-15 Schweizerische Bundesbahnen Balkengleisbremse.
DE3930332A1 (de) 1989-09-11 1991-03-14 Siemens Ag Bremsbalken fuer balkengleisbremsen mit segmentierten verschleisselementen
DE202011110091U1 (de) * 2011-10-07 2012-11-22 Sona Blw Präzisionsschmiede Gmbh Gleisbremse für Schienenfahrzeuge

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US206738A (en) * 1878-08-06 Improvement in railroad-rails
FR2254467A1 (fr) * 1973-12-15 1975-07-11 Thyssen Huette Ag
CH634514A5 (de) 1978-11-16 1983-02-15 Schweizerische Bundesbahnen Balkengleisbremse.
DE3930332A1 (de) 1989-09-11 1991-03-14 Siemens Ag Bremsbalken fuer balkengleisbremsen mit segmentierten verschleisselementen
DE202011110091U1 (de) * 2011-10-07 2012-11-22 Sona Blw Präzisionsschmiede Gmbh Gleisbremse für Schienenfahrzeuge
DE102011115089A1 (de) 2011-10-07 2013-04-11 Sona Blw Präzisionsschmiede Gmbh Gleisbremse für Schienenfahrzeuge

Also Published As

Publication number Publication date
EP2865578B1 (fr) 2016-10-05
DE102014015334A1 (de) 2015-04-23

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