EP2081812B1 - Device for removing of moisture from railway rails - Google Patents

Device for removing of moisture from railway rails Download PDF

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Publication number
EP2081812B1
EP2081812B1 EP07835200.2A EP07835200A EP2081812B1 EP 2081812 B1 EP2081812 B1 EP 2081812B1 EP 07835200 A EP07835200 A EP 07835200A EP 2081812 B1 EP2081812 B1 EP 2081812B1
Authority
EP
European Patent Office
Prior art keywords
moisture
rail
wheel
removing unit
wiping blade
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.)
Not-in-force
Application number
EP07835200.2A
Other languages
German (de)
French (fr)
Other versions
EP2081812A1 (en
EP2081812A4 (en
Inventor
Kennerth Samuelsson
Hans Larsen
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.)
Tkb Modell AB
Original Assignee
Tkb Modell AB
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
Priority claimed from SE0602422A external-priority patent/SE0602422L/xx
Application filed by Tkb Modell AB filed Critical Tkb Modell AB
Publication of EP2081812A1 publication Critical patent/EP2081812A1/en
Publication of EP2081812A4 publication Critical patent/EP2081812A4/en
Application granted granted Critical
Publication of EP2081812B1 publication Critical patent/EP2081812B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
    • B61F19/00—Wheel guards; Bumpers; Obstruction removers or the like
    • B61F19/06—Nets, catchers, or the like for catching obstacles or removing them from the track
    • B61F19/08—Nets, catchers, or the like for catching obstacles or removing them from the track of the drop-down type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61C—LOCOMOTIVES; MOTOR RAILCARS
    • B61C15/00—Maintaining or augmenting the starting or braking power by auxiliary devices and measures; Preventing wheel slippage; Controlling distribution of tractive effort between driving wheels
    • B61C15/08—Preventing wheel slippage

Definitions

  • the present invention relates to a device, which is adapted to prevent the forming of a wheel flat on vehicle wheels, which run on a rail, according to the characteristics of the preamble of independent claim 1.
  • a wheel flat is formed on a vehicle wheel when, in braking, the wheel is locked and slides on the rail.
  • a vehicle wheel with a wheel flat is out-of-round and must for renewed use be turned in a lathe once more, which takes time and is expensive.
  • the object of the invention is to reduce the risk of a vehicle wheel, in braking, being locked and thus sliding on a rail, that is to prevent the forming of a wheel flat.
  • a further object is to increase friction against the rail as the speed of rotation of the wheel is being changed.
  • a device which comprises a moisture removing unit, which is arranged in front of the wheel, seen in the travelling direction of the vehicle, to remove, in an active position, moisture from the upper side of the rail.
  • the device advantageously comprises a rain sensor unit, which is arranged, when sensing moisture, to move the moisture removing unit to its active position, either only when the wheel is being braked, or when it is being both braked and accelerated.
  • the device is thus suitably only active when there is a risk of the wheels sliding during braking and/or spinning during acceleration.
  • the moisture removing unit comprises a moisture wiping unit, which comprises a wiping blade, which is movable between a starting position, in which it is spaced from the rail, and a working position, which corresponds to the active position of the moisture removing unit and in which the wiping blade abuts against the upper side of the rail to wipe moisture from the same.
  • the wiping blade is preferably vertically adjustable by means of a cylinder assembly.
  • the wiping blade is preferably inclined downwards backwards, seen in the travelling direction of the vehicle, to minimise wear, and it suitably forms an angle different from 90° to the longitudinal direction of the rail.
  • Fig. 1 shows part of a chassis 1 for a vehicle, such as a railway engine or railway carriage, which chassis is supported by a vehicle wheel 2, which runs on a rail 3.
  • a moisture removing unit 4 is arranged in front of the wheel, seen in the travelling direction of the vehicle.
  • the moisture removing unit 4 is in Figs 1 and 2 in a passive position and in Fig. 3 in an active position.
  • the moisture removing unit 4 is a moisture wiping unit 4 which comprises a wiping blade 5, which by means of a suitable joint 6, such as a screw joint, is attached to a blade holder 7.
  • the blade holder 7 is in turn attached to a plate 8, which via a piston rod is connected to a piston (not shown) of a pneumatic cylinder assembly 9.
  • This cylinder assembly can, of course, also be hydraulic.
  • the wiping blade 5 is vertically adjustable by means of the cylinder assembly 9 and can be moved from a starting position to a working position.
  • the wiping blade 5 In the starting position, which is shown in Figs 1 and 2 , the wiping blade 5 is spaced from the rail 3. In the working position, which is shown in Fig. 3 , the wiping blade 5 abuts against the upper side of the rails 3 to wipe moisture from the same.
  • the working position corresponds to the active position of the moisture wiping unit.
  • the wiping blade is a scraper of rubber, Teflon, silicone or some other material that has the strength and rigidity that are necessary for this application.
  • the wiping blade extends obliquely downwards backwards relative to the travelling direction of the vehicle. Of course, it could also be directed forwards, but this would cause greater wear on the blade in the working position.
  • the wiping blade is inclined relative to the longitudinal direction of the rail, that is it makes an angle, which is different from 90°, to the longitudinal direction of the rail.
  • the moisture wiping unit 4 is to be moved to its active position when the wheel is being braked and the rail is moist.
  • the moisture removing unit is automatically connectable by means of a rain sensor 10 (schematically shown), which senses rain or moisture and which via a control unit 11 controls the moisture wiping unit.
  • the rain sensor 10 is arranged on the front of the vehicle.
  • the rain sensor 10 has such a sensitivity as to sense moisture, such as dew, and is activated even if there is no rain but the rail is moist.
  • the rain sensor signals to the control unit 10, which then moves the moisture wiping unit 4 to its active position to remove moisture from the upper side of the rail. This occurs by the cylinder assembly being actuated, via a pressure transducer 12, by the control unit 11 to move, by means of the piston and the piston rod, the wiping blade 5 from its starting position to its working position.
  • the cylinder assembly may also be actuated manually. It is also possible for the moisture removing unit to be connected in series to the windscreen wiper of the engine in such a manner that the moisture removing unit is moved to the active position when the wheel is being braked and the windscreen wipers are working.
  • the moisture removing unit is controlled in the same way as described above, but with the difference that the unit is moved to the active position as the wheel is being accelerated.
  • the moisture removing unit can thus also be a device which blows air onto the rail in order to dry it.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Regulating Braking Force (AREA)
  • Braking Arrangements (AREA)

Description

    Field of the Invention
  • The present invention relates to a device, which is adapted to prevent the forming of a wheel flat on vehicle wheels, which run on a rail, according to the characteristics of the preamble of independent claim 1.
    • Background Art
  • A wheel flat is formed on a vehicle wheel when, in braking, the wheel is locked and slides on the rail. A vehicle wheel with a wheel flat is out-of-round and must for renewed use be turned in a lathe once more, which takes time and is expensive.
  • Examples of the closest prior art according to the preamble of independent claim 1 are known from e.g.:
    • US 3 777 858 discloses a railway vehicle braking system comprising a friction brake and a wiper device arranged to wipe the tire of a vehicle wheel or the rail on which the wheel runs. The wiper device is actuated in response to operation of a skid sensor.
    • GB 1 270 327 discloses an anti-slip or anti-skid device for rail vehicles in combination with a rail cleaner. The anti-slip or anti-skid device is active if slipping or skidding of vehicle wheels of a wheel set occurs during a braking or driving operation. The rail cleaner is brought into an operative condition in response to action of the anti-slip or anti-skid device.
    • GB 2 355 702 discloses a train with a rail cleaning device. The rail cleaning device comprises a laser beam generating system for destroying contaminants of the rail.
    Object of the Invention
  • The object of the invention is to reduce the risk of a vehicle wheel, in braking, being locked and thus sliding on a rail, that is to prevent the forming of a wheel flat. A further object is to increase friction against the rail as the speed of rotation of the wheel is being changed.
    • Summary of the invention
  • This object is achieved by a device, which comprises a moisture removing unit, which is arranged in front of the wheel, seen in the travelling direction of the vehicle, to remove, in an active position, moisture from the upper side of the rail.
  • Moreover, the device advantageously comprises a rain sensor unit, which is arranged, when sensing moisture, to move the moisture removing unit to its active position, either only when the wheel is being braked, or when it is being both braked and accelerated. The device is thus suitably only active when there is a risk of the wheels sliding during braking and/or spinning during acceleration.
  • In a preferred embodiment of the device, the moisture removing unit comprises a moisture wiping unit, which comprises a wiping blade, which is movable between a starting position, in which it is spaced from the rail, and a working position, which corresponds to the active position of the moisture removing unit and in which the wiping blade abuts against the upper side of the rail to wipe moisture from the same.
  • The wiping blade is preferably vertically adjustable by means of a cylinder assembly.
  • The wiping blade is preferably inclined downwards backwards, seen in the travelling direction of the vehicle, to minimise wear, and it suitably forms an angle different from 90° to the longitudinal direction of the rail.
    • Brief Description of the Drawings
  • The invention will now be described in more detail by means of a preferred, but not limiting, embodiment and with reference to the accompanying drawings.
    • Fig. 1 is a side view and shows a device according to the invention, applied to a vehicle wheel and arranged in a passive position.
    • Fig. 2 is a detail view of the device in Fig. 1.
    • Fig. 3 is a side view and shows a device according to the invention in an active position.
    Description of a Preferred Embodiment
  • Fig. 1 shows part of a chassis 1 for a vehicle, such as a railway engine or railway carriage, which chassis is supported by a vehicle wheel 2, which runs on a rail 3. A moisture removing unit 4 is arranged in front of the wheel, seen in the travelling direction of the vehicle. The moisture removing unit 4 is in Figs 1 and 2 in a passive position and in Fig. 3 in an active position.
  • In the shown example, the moisture removing unit 4 is a moisture wiping unit 4 which comprises a wiping blade 5, which by means of a suitable joint 6, such as a screw joint, is attached to a blade holder 7. The blade holder 7 is in turn attached to a plate 8, which via a piston rod is connected to a piston (not shown) of a pneumatic cylinder assembly 9. This cylinder assembly can, of course, also be hydraulic.
  • The wiping blade 5 is vertically adjustable by means of the cylinder assembly 9 and can be moved from a starting position to a working position.
  • In the starting position, which is shown in Figs 1 and 2, the wiping blade 5 is spaced from the rail 3. In the working position, which is shown in Fig. 3, the wiping blade 5 abuts against the upper side of the rails 3 to wipe moisture from the same. The working position corresponds to the active position of the moisture wiping unit.
  • The wiping blade is a scraper of rubber, Teflon, silicone or some other material that has the strength and rigidity that are necessary for this application.
  • For adequate abutment against the rail and good wiping capacity, the wiping blade extends obliquely downwards backwards relative to the travelling direction of the vehicle. Of course, it could also be directed forwards, but this would cause greater wear on the blade in the working position.
  • Furthermore, the wiping blade is inclined relative to the longitudinal direction of the rail, that is it makes an angle, which is different from 90°, to the longitudinal direction of the rail.
  • The moisture wiping unit 4 is to be moved to its active position when the wheel is being braked and the rail is moist. The moisture removing unit is automatically connectable by means of a rain sensor 10 (schematically shown), which senses rain or moisture and which via a control unit 11 controls the moisture wiping unit. The rain sensor 10 is arranged on the front of the vehicle. The rain sensor 10 has such a sensitivity as to sense moisture, such as dew, and is activated even if there is no rain but the rail is moist. When the wheel 2 is being braked and the rain sensor 10 senses moisture, the rain sensor signals to the control unit 10, which then moves the moisture wiping unit 4 to its active position to remove moisture from the upper side of the rail. This occurs by the cylinder assembly being actuated, via a pressure transducer 12, by the control unit 11 to move, by means of the piston and the piston rod, the wiping blade 5 from its starting position to its working position.
  • In an alternative embodiment, the cylinder assembly may also be actuated manually. It is also possible for the moisture removing unit to be connected in series to the windscreen wiper of the engine in such a manner that the moisture removing unit is moved to the active position when the wheel is being braked and the windscreen wipers are working.
  • When there is a risk of the wheels spinning, the moisture removing unit is controlled in the same way as described above, but with the difference that the unit is moved to the active position as the wheel is being accelerated.
  • The invention can be modified in various ways within the scope of the claims. The moisture removing unit can thus also be a device which blows air onto the rail in order to dry it.

Claims (8)

  1. A device, which is adapted to prevent the forming of a wheel flat on an vehicle wheel (2), which runs on a rail (3), and comprises a moisture removing unit (4), which can be arranged in front of the wheel (3), seen in the travelling direction of the vehicle, to remove, in an active position, moisture from the upper side of the rail (3),
    characterised in that it comprises a rain sensor unit (10), which is arranged, when sensing moisture, to move the moisture removing unit (4) to its active position.
  2. A device as claimed in claim 1, characterised in that it comprises a rain sensor unit (10), which is arranged, when sensing moisture, to move the moisture removing unit (4) to its active position only when the wheel (3) is being braked.
  3. A device as claimed in claim 1, characterised in that it comprises a rain sensor unit (10), which is arranged, when sensing moisture, to move the moisture removing unit (4) to its active position when the speed of rotation of the wheel (3) is being changed.
  4. A device as claimed in any one of claims 1-3, characterised in that the moisture removing unit (4) is a moisture wiping unit, which comprises a wiping blade (5), which is movable between a starting position, in which it is spaced from the rail (3), and a working position, which corresponds to the active position of the moisture removing unit and in which the wiping blade (5) abuts against the upper side of the rail (3) to wipe moisture from the same.
  5. A device as claimed in claim 4, characterised in that the starting position is an upper position, in which the wiping blade (5) is spaced from the rail above the same, and the working position is a lower position.
  6. A device as claimed in claim 5, characterised in that the wiping blade (5) is vertically adjustable by means of a cylinder assembly (9).
  7. A device as claimed in any one of claims 4-6, characterised in that the wiping blade (5) is inclined downwards backwards, seen in the travelling direction of the vehicle.
  8. A device as claimed in any one of claims 4-7, characterised in that the wiping blade (5) forms an angle different from 90° to the longitudinal direction of the rail.
EP07835200.2A 2006-11-15 2007-11-14 Device for removing of moisture from railway rails Not-in-force EP2081812B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0602422A SE0602422L (en) 2006-11-15
PCT/SE2007/001000 WO2008060220A1 (en) 2006-11-15 2007-11-14 Device for removing of moisture from railway rails

Publications (3)

Publication Number Publication Date
EP2081812A1 EP2081812A1 (en) 2009-07-29
EP2081812A4 EP2081812A4 (en) 2012-08-01
EP2081812B1 true EP2081812B1 (en) 2016-01-27

Family

ID=39401937

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07835200.2A Not-in-force EP2081812B1 (en) 2006-11-15 2007-11-14 Device for removing of moisture from railway rails

Country Status (2)

Country Link
EP (1) EP2081812B1 (en)
WO (1) WO2008060220A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102320312A (en) * 2011-07-01 2012-01-18 长春轨道客车股份有限公司 Bogie obstruction guard and flange lubrication integrated device
CN103661476B (en) * 2013-09-23 2017-01-25 中车青岛四方机车车辆股份有限公司 High-speed railway vehicle barrier-removing device
JP6397666B2 (en) * 2014-06-27 2018-09-26 西日本旅客鉄道株式会社 Device
US9631332B2 (en) * 2014-08-28 2017-04-25 Electro-Motive Diesel, Inc. Movable sand plow for locomotive

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1527541A (en) * 1924-05-16 1925-02-24 Robert J Dougherty Safety device for railway motor cars
US2042029A (en) * 1932-10-19 1936-05-26 Firestone Tire & Rubber Co Rail wiper
FR2015758A1 (en) 1968-08-16 1970-04-30 Knorr Bremse Gmbh
GB1362269A (en) 1971-03-30 1974-08-07 Girling Ltd Railway vehicle braking systems
SE461229B (en) * 1987-05-11 1990-01-22 Maehler & Soener PROCEDURE AND DEVICE FOR CLEANING RAELS
GB9925747D0 (en) 1999-11-01 1999-12-29 Higgins Malcolm Leaf destruction method and apparatus

Also Published As

Publication number Publication date
EP2081812A1 (en) 2009-07-29
WO2008060220A1 (en) 2008-05-22
EP2081812A4 (en) 2012-08-01

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