EP1826091A1 - Method for optimizing guidance of railway vehicles - Google Patents

Method for optimizing guidance of railway vehicles Download PDF

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Publication number
EP1826091A1
EP1826091A1 EP07102904A EP07102904A EP1826091A1 EP 1826091 A1 EP1826091 A1 EP 1826091A1 EP 07102904 A EP07102904 A EP 07102904A EP 07102904 A EP07102904 A EP 07102904A EP 1826091 A1 EP1826091 A1 EP 1826091A1
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EP
European Patent Office
Prior art keywords
wheels
guidance
chassis
rails
suspension means
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
EP07102904A
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German (de)
French (fr)
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EP1826091B1 (en
Inventor
José Luis Patentes Talgo S.A. López Gómez
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Patentes Talgo SL
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Patentes Talgo SL
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Priority to PL07102904T priority Critical patent/PL1826091T3/en
Publication of EP1826091A1 publication Critical patent/EP1826091A1/en
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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
    • B61F5/00—Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
    • B61F5/38—Arrangements or devices for adjusting or allowing self- adjustment of wheel axles or bogies when rounding curves, e.g. sliding axles, swinging axles
    • B61F5/386—Arrangements or devices for adjusting or allowing self- adjustment of wheel axles or bogies when rounding curves, e.g. sliding axles, swinging axles fluid actuated

Definitions

  • the invention relates to a method for optimizing guidance of railway vehicles that can be applied to free-wheel railway vehicles, such as vehicles with TALGO-type one-axle running gear with independent wheels, and to railway vehicles with wheels coupled bogies.
  • Spanish patent 2.195.756 belonging to the same applicant filing this invention discloses a system and a method for optimizing free-wheel guidance of railway vehicles.
  • the present invention is also aimed at meeting this need.
  • the first object of the present invention is an optimized method for guidance of railway vehicles of the free-wheel or coupled wheel type comprising adjustable suspension means for suspending the wagons on the chassis or bogie housing the wheels, comprising the following steps:
  • the second object of the present invention is an optimized method for guidance of railway vehicles of the free-wheel or coupled wheel type comprising adjustable suspension means for suspending the boxes on the chassis or bogie housing the wheels including asymmetrical dampers, comprising the following steps:
  • the methods object of the present invention will preferably be used as a supplement to the aforementioned guidance systems, but it is necessary to point out that they can be used separately from them.
  • diameter D1 of the section of the wheel 11 in contact with the rail 15 is not diameter Dm that would correspond if the wheel were centered, rather it is larger.
  • the angular velocities of the wheels 11 and 13 are not the same- which would occur if they were centered- but rather they are different.
  • the magnitude and direction of the different angular velocity of the wheels of one axle are parameters that define their being off-centered, and their values can be obtained using known means such as sensors for the antilock brake system (ABS) incorporated in many trains today.
  • ABS antilock brake system
  • the system and method disclosed in patent document 2.195.756 which optimizes the guidance by acting on the guidance bars, the off-centering of the wheels is detected from the measurement of their angular velocities.
  • the present invention has come about from the observation of the effects of the operation of the suspension means used, which are briefly described below, on guidance of railway vehicles.
  • chassis 45 In the first embodiment of the invention and according to Figure 2, three perfectly centered free-wheel type chasses 41, 43, 45 can be seen.
  • the main elements have been referenced in chassis 45 for the purpose of the present invention: the wheels 11, 13, suspension means 21, 23, the support turrets of the suspension means 25, 27 and the guidance bars 19 corresponding with those described in patent documents 2.133.229 and 2.195.756 .
  • the method proposed by the present invention consists of correcting the off-centering of the wheels by acting on the suspension means. So if an off-centering of the chassis 41 such as that shown in Figure 2 is detected when the angular velocities of its wheels are compared, according to the method, the left suspension 21 must be lifted by the magnitude that is necessary to correct the off-centering.
  • asymmetrical dampers In a second embodiment of the invention, which can be applied to trains provided with asymmetrical dampers, the method would be applied by acting on the asymmetrical dampers so that they displace the centers of the bogie and wagon towards the appropriate side to optimize rolling.
  • the asymmetrical damper is similar to the standard damper, with the particularity that it has two electrovalves, such that when the two electrovalves are deactivated, it performs like a normal damper.
  • the same force is required for traction as for compression. If an electrovalve is actuated, the compression one for example, the compression strength is reduced to "0" or is progressively reduced, achieving displacement of the wagon when the vehicle is running due to the tendency of said vehicle to move to the side.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Machines For Laying And Maintaining Railways (AREA)

Abstract

Optimized method for guidance of railway vehicles of the free-wheel or coupled wheel type comprising adjustable suspension means for suspending the wagons on the chassis or bogie (41,43,45) housing the wheels, comprising the following steps:
- detecting for each vehicle axle an off-centering of its wheels (11, 13) in relation to the rails (15, 17);
- modifying the height of the supports (25, 27) for the suspension means (21, 23) for the wagons placed on each chassis (41, 43, 45) by the magnitude required to center the wheels (11, 13) on the rails (15, 17).

Description

    Field of the Invention
  • The invention relates to a method for optimizing guidance of railway vehicles that can be applied to free-wheel railway vehicles, such as vehicles with TALGO-type one-axle running gear with independent wheels, and to railway vehicles with wheels coupled bogies.
    • Background of the Invention
  • Spanish patents 2.133.229 and 2.084.551 , which belong to the same applicant filing this invention, and which are herein incorporated by reference, describe guidance systems that can be respectively applied to freewheel and coupled wheel railway vehicles.
  • Those guidance systems have the purpose of achieving that the angle formed by each wheel flange with the line tangent to a curve in the track at the point of contact with the latter be null, and they respond to the principle that the rail should not guide the train, but rather that the train must move on the rail. To that end such systems are based on the interaction of the chasses on the running gear through guiding bars such that the relative movement of said chasses suitably orients the running gear so that the wheels remain parallel to the rail even in curves so as to increase the running safety and to reduce the wear of the wheels and the track.
  • Nevertheless, these guidance systems are not as accurate as they should be, especially for high-speed trains; they therefore need to be optimized.
  • In response to this need, Spanish patent 2.195.756 belonging to the same applicant filing this invention discloses a system and a method for optimizing free-wheel guidance of railway vehicles.
  • The present invention is also aimed at meeting this need.
    • Summary of the Invention
  • The first object of the present invention is an optimized method for guidance of railway vehicles of the free-wheel or coupled wheel type comprising adjustable suspension means for suspending the wagons on the chassis or bogie housing the wheels, comprising the following steps:
    • detecting for each vehicle axle an off-centering of its wheels in relation to the rails;
    • modifying the height of the supports for the suspension means for the wagons placed on each chassis by the magnitude required to center the wheels on the rails.
  • The second object of the present invention is an optimized method for guidance of railway vehicles of the free-wheel or coupled wheel type comprising adjustable suspension means for suspending the boxes on the chassis or bogie housing the wheels including asymmetrical dampers, comprising the following steps:
    • detecting for each vehicle axle an off-centering of its wheels in relation to the rails;
    • modifying the position of the center of the chassis or bogie by the magnitude required to center the wheels on the rails acting on the asymmetrical dampers.
  • The methods object of the present invention will preferably be used as a supplement to the aforementioned guidance systems, but it is necessary to point out that they can be used separately from them.
  • Other features and advantages of the present invention will be understood from the following detailed description of an embodiment illustrating its object in relation to the attached figures.
    • Brief Description of the Drawings
    • Figure 1 shows a schematic view of an axle of a railway vehicle, the wheels of which are off-centered with respect to the rails.
    • Figure 2 schematically shows the influence of the position of the wagons in the guidance.
    • Figure 3 shows a chassis of a railway vehicle with pneumatic suspension means adjusted by level valves.
    Detailed Description of the Invention
  • According to Figure 1, it can be seen that the axle integrating the wheels 11, 13 is off-centered in relation to the rails 15, 17, and this translates into the fact that the diameter D2 of the section of the wheel 13 in contact with the rail is not diameter Dm that would correspond to it if the wheel were centered, rather it is smaller.
  • For its part, diameter D1 of the section of the wheel 11 in contact with the rail 15 is not diameter Dm that would correspond if the wheel were centered, rather it is larger.
  • Accordingly, the angular velocities of the wheels 11 and 13 are not the same- which would occur if they were centered- but rather they are different.
  • The magnitude and direction of the different angular velocity of the wheels of one axle are parameters that define their being off-centered, and their values can be obtained using known means such as sensors for the antilock brake system (ABS) incorporated in many trains today. In fact, the system and method disclosed in patent document 2.195.756 , which optimizes the guidance by acting on the guidance bars, the off-centering of the wheels is detected from the measurement of their angular velocities.
  • The present invention has come about from the observation of the effects of the operation of the suspension means used, which are briefly described below, on guidance of railway vehicles.
  • In the first embodiment of the invention and according to Figure 2, three perfectly centered free- wheel type chasses 41, 43, 45 can be seen. The main elements have been referenced in chassis 45 for the purpose of the present invention: the wheels 11, 13, suspension means 21, 23, the support turrets of the suspension means 25, 27 and the guidance bars 19 corresponding with those described in patent documents 2.133.229 and 2.195.756 .
  • The off-centering that occurs in the chassis 41 when its left suspension 21 is under the right suspension 23 can be seen in the central right part of Figure 2: the running gear axle 53 separates from the axis of the track 55 and subsequent the angle between the axle 51 of the chassis 41 and the axis of the track 55 is not 90°.
  • This proves that there is a direct relation between the angle with the horizontal of a supposed axis 57 that joined suspensions 25, 27 and the magnitude of the off-centering, and therefore the method proposed by the present invention consists of correcting the off-centering of the wheels by acting on the suspension means. So if an off-centering of the chassis 41 such as that shown in Figure 2 is detected when the angular velocities of its wheels are compared, according to the method, the left suspension 21 must be lifted by the magnitude that is necessary to correct the off-centering.
  • The following is necessary to implement the method:
    • Means of detecting the speed of the wheels of each axle.
    • Adjustable suspension means on each axle.
    • Management and control means that allow computing the modification of the height of the suspension means required to correct the off-centering according to its magnitude.
  • Trains today generally incorporate these means, so they are not a specific object of the present invention.
  • In the case of the pneumatic suspension means such as those shown in Figure 3 regulated by level valves 61, their heights would be adjusted by acting on the control means of said valves.
  • In a second embodiment of the invention, which can be applied to trains provided with asymmetrical dampers, the method would be applied by acting on the asymmetrical dampers so that they displace the centers of the bogie and wagon towards the appropriate side to optimize rolling.
  • The asymmetrical damper is similar to the standard damper, with the particularity that it has two electrovalves, such that when the two electrovalves are deactivated, it performs like a normal damper. The same force is required for traction as for compression. If an electrovalve is actuated, the compression one for example, the compression strength is reduced to "0" or is progressively reduced, achieving displacement of the wagon when the vehicle is running due to the tendency of said vehicle to move to the side.
  • In the embodiments described above those modifications comprised within the scope of the following claims can be introduced.

Claims (3)

  1. Optimized method for guidance of railway vehicles of the free-wheel or coupled wheel type comprising adjustable suspension means for suspending the wagons on the chassis or bogie (41,43,45) housing the wheels, characterized in that it comprises the following steps:
    - detecting for each vehicle axle an off-centering of its wheels (11, 13) in relation to the rails (15, 17);
    - modifying the height of the supports (25, 27) for the suspension means (21, 23) for the wagons placed on each chassis (41, 43, 45) by the magnitude required to center the wheels (11, 13) on the rails (15, 17).
  2. Optimized method for guidance of railway vehicles according to claim 1, characterized in that the suspension means are pneumatic and their height is adjusted by means of level valves (61).
  3. Optimized method for guidance of railway vehicles of the free-wheel or coupled wheel type comprising adjustable suspension means for suspending the wagons on the chassis or bogie housing the wheels including asymmetrical dampers, characterized in that it comprises the following steps:
    - detecting for each vehicle axle an off-centering of its wheels (11, 13) in relation to the rails (15, 17);
    - modifying the position of the center of the chassis or bogie by the magnitude required to center the wheels (11, 13) on the rails (15, 17) acting on the asymmetrical dampers.
EP20070102904 2006-02-24 2007-02-22 Method for optimizing guidance of railway vehicles Active EP1826091B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07102904T PL1826091T3 (en) 2006-02-24 2007-02-22 Method for optimizing guidance of railway vehicles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES200600440A ES2316220B1 (en) 2006-02-24 2006-02-24 METHOD FOR OPTIMIZING GUIDANCE OF RAILWAY VEHICLES.

Publications (2)

Publication Number Publication Date
EP1826091A1 true EP1826091A1 (en) 2007-08-29
EP1826091B1 EP1826091B1 (en) 2010-04-07

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EP20070102904 Active EP1826091B1 (en) 2006-02-24 2007-02-22 Method for optimizing guidance of railway vehicles

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EP (1) EP1826091B1 (en)
AT (1) ATE463404T1 (en)
DE (1) DE602007005707D1 (en)
DK (1) DK1826091T3 (en)
ES (1) ES2316220B1 (en)
PL (1) PL1826091T3 (en)
PT (1) PT1826091E (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4693185A (en) * 1986-02-21 1987-09-15 Dofasco Inc. Control systems for vehicle fluid suspension systems
US5463963A (en) * 1993-07-30 1995-11-07 Gec Alsthom Transport Sa Method of centering steerable axles of a bogie
ES2084551A2 (en) 1993-10-15 1996-05-01 Invest Y Asesoriamiento Tecnic A guiding system applicable to a four-wheel bogie with variable gap between them.
EP0765791A1 (en) * 1993-11-26 1997-04-02 Jenbacher Energiesysteme Aktiengesellschaft Single axle running gear box for a railway vehicle
ES2133229A1 (en) 1996-12-24 1999-09-01 Talgo Patentes Rolling monoaxle provided with movable independent wheels for articulated railway carriages intended to the transportation of cars
EP1063143A1 (en) * 1999-06-22 2000-12-27 Mitsubishi Heavy Industries, Ltd. Single axle and independent wheels bogie for a railway vehicle
ES2195756A1 (en) 2001-12-27 2003-12-01 Talgo Patentes System for optimizing the steering of railway axles

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4693185A (en) * 1986-02-21 1987-09-15 Dofasco Inc. Control systems for vehicle fluid suspension systems
US5463963A (en) * 1993-07-30 1995-11-07 Gec Alsthom Transport Sa Method of centering steerable axles of a bogie
ES2084551A2 (en) 1993-10-15 1996-05-01 Invest Y Asesoriamiento Tecnic A guiding system applicable to a four-wheel bogie with variable gap between them.
EP0765791A1 (en) * 1993-11-26 1997-04-02 Jenbacher Energiesysteme Aktiengesellschaft Single axle running gear box for a railway vehicle
ES2133229A1 (en) 1996-12-24 1999-09-01 Talgo Patentes Rolling monoaxle provided with movable independent wheels for articulated railway carriages intended to the transportation of cars
EP1063143A1 (en) * 1999-06-22 2000-12-27 Mitsubishi Heavy Industries, Ltd. Single axle and independent wheels bogie for a railway vehicle
ES2195756A1 (en) 2001-12-27 2003-12-01 Talgo Patentes System for optimizing the steering of railway axles

Also Published As

Publication number Publication date
ES2316220B1 (en) 2010-01-12
ATE463404T1 (en) 2010-04-15
PT1826091E (en) 2010-07-07
PL1826091T3 (en) 2010-09-30
ES2316220A1 (en) 2009-04-01
EP1826091B1 (en) 2010-04-07
DK1826091T3 (en) 2010-08-02
DE602007005707D1 (en) 2010-05-20

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