EP3470294A1 - Bogie - Google Patents

Bogie Download PDF

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Publication number
EP3470294A1
EP3470294A1 EP17020475.4A EP17020475A EP3470294A1 EP 3470294 A1 EP3470294 A1 EP 3470294A1 EP 17020475 A EP17020475 A EP 17020475A EP 3470294 A1 EP3470294 A1 EP 3470294A1
Authority
EP
European Patent Office
Prior art keywords
bogie
vehicle body
bolster
vehicle
mounting arrangement
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.)
Withdrawn
Application number
EP17020475.4A
Other languages
German (de)
English (en)
Inventor
Alan Harding
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.)
Hba Rail Ltd
Original Assignee
Hba Rail Ltd
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 Hba Rail Ltd filed Critical Hba Rail Ltd
Priority to EP17020475.4A priority Critical patent/EP3470294A1/fr
Publication of EP3470294A1 publication Critical patent/EP3470294A1/fr
Withdrawn legal-status Critical Current

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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
    • B61F5/02—Arrangements permitting limited transverse relative movements between vehicle underframe or bolster and bogie; Connections between underframes and bogies
    • B61F5/04—Bolster supports or mountings
    • B61F5/12—Bolster supports or mountings incorporating dampers
    • 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
    • B61F5/02—Arrangements permitting limited transverse relative movements between vehicle underframe or bolster and bogie; Connections between underframes and bogies
    • B61F5/04—Bolster supports or mountings
    • B61F5/12—Bolster supports or mountings incorporating dampers
    • B61F5/127—Bolster supports or mountings incorporating dampers with fluid as a damping medium

Definitions

  • This invention relates to a bogie truck for a railway vehicle.
  • a track friendly bogie truck that is to say a bogie that, in use, results in relatively little wear to the tracks along which it runs, in use.
  • the TF25 bogie is typically restricted to running at a top speed of 120km/h when unladen as mentioned above.
  • the presence of a locomotive hauling wagons at this speed on a congested rail network is undesirable as it results in other trains, for example high speed passenger trains, being slowed.
  • FIG. 1 illustrates, in plan view a bogie fitted with such yaw control dampers.
  • the yaw control dampers 5 are connected between the ends of the bogie side frames 6 and other parts of the wagon. These dampers 5 damp the hunting or instability that occurs, but the presence of the yaw control dampers 5 adds weight to the bogie, and so reduces the maximum load carrying capacity of a wagon using the bogies, which is undesirable.
  • Another object of the invention is to provide a bogie in which stability in plan view, when operating under tare conditions, is enhanced without the need to provide a yaw control damper.
  • a bogie for use in a railway vehicle having a vehicle body, the bogie comprising a pair of side frames interconnected by a transverse bolster, the side frames supporting therebetween at least one axle and wheel set, a mounting arrangement whereby part of the vehicle body may be supported upon the bolster, the mounting arrangement being articulated to allow tilting and other movement of the vehicle body relative to the bolster, in use, secondary springs located between the bolster and the vehicle body resisting such movement, and a variable damper damping articulation of the mounting arrangement, wherein the variable damper is adjustable such that the degree of damping can be adjusted depending upon whether or not the vehicle is laden.
  • a connection may be provided between a brake change over valve and the variable damper.
  • variable damper need not provide a significant level of damping, and the bogie may operate in substantially the manner of a traditional bogie, for example in the manner of a known TF25 bogie or the like.
  • the damper may serve to damp the articulation between the vehicle body and the bolster to a greater degree, thereby reducing yaw instability. Switching of the damper between these operating modes may be achieved automatically upon switching of the brakes between the corresponding operating modes.
  • the secondary springs are conveniently of a reduced stiffness.
  • the unladen vertical stiffness is in the region of 6kN/mm (per spring) and the unladen lateral stiffness is in the region of 0.5kN/mm (per spring), and the secondary spring are preferably, in accordance with the invention, of lower lateral and/or vertical stiffness than this.
  • a bogie 10 is illustrated that comprises a pair of side frames 12 interconnected by a transverse bolster 14.
  • Each side frame 12 has a pair of axle box housings 16 pivotally connected thereto, primary suspension means in the form of springs 18 and dampers 20 being provided to allow damped vertical movement of the axle boxes 22 carried by the housings 16 relative to the bolster 14. It will be appreciated that the primary suspension means serves to accommodate disuniformities in the track.
  • the bogie 10 further comprises a pair of axle and wheel sets 24 that extend between the side frames 12, being supported, at their ends, by respective ones of the axle boxes 22.
  • Each side frame 12 has a brake arrangement associated therewith, including brake pads that may be driven or pushed against parts of the wheels to resist rotation of the wheels.
  • a brake switch over valve 26 is provided, the operation of which switches the operation of the brake arrangement between a low load setting and a high load setting, modifying the applied brake loadings to suit the load conditions under which the vehicle is being operated.
  • a vehicle body (not shown in detail in the drawings, but the underside of which is denoted by line 28) is supported upon the bogie 10.
  • the underside of the vehicle body sits upon secondary springs 30 that, in turn, are supported upon the bolster 14.
  • the secondary springs 30 conveniently take substantially the form shown in EP1093548 .
  • the secondary springs 30 are of a reduced stiffness, both in the vertical direction and in the lateral direction.
  • the unladen vertical stiffness of the secondary springs is typically in the region of 6kN/mm, and the lateral stiffness thereof is in the region of 0.5kN/mm.
  • the vehicle body is further supported upon the bolster 14 by an articulated mounting arrangement 32.
  • the arrangement 32 comprises a fixing 34 attached, in use, to the underside of the vehicle body, the fixing 34 including a projection 36 that is received within a cavity formed in the bolster 14.
  • the cavity is of a shape and size sufficient to allow limited movement of the fixing 34 relative to the bolster 14 to allow tilting of the vehicle body, and to allow limited angular movement between a longitudinal axis of the vehicle body and a longitudinal axis of the bogie 10, as may occur, for example, as the vehicle passes around a bend or curve in a track.
  • a damper 38 is provided to damp relative movement between the projection 36 and the bolster 14.
  • the damper 38 may damp tilting movement, plan view yaw movement and other movements as permitted by the articulation of the mounting arrangement 32.
  • the damper 38 is of a design such that the damping load applied thereby may be varied, and thus takes the form of a variable rate damper.
  • the damper 38 is connected, by way of a pneumatic line 40, to the brake switch over valve 26 such that when the brake setting is such that the brakes are operating in the vehicle laden operating mode, then the degree of damping applied by the damper 38 to damp movement between the projection 36 and the bolster 14 is relatively low.
  • the damper 38 When the vehicle is being moved in an unladen condition, and the brake switch over valve 26 is positioned accordingly, then the damper 38 will apply a relatively large damping load. As a result, the damper 38 serves to counter the yaw instability that is typically experienced when the vehicle is moved at high speed under unladen or low load conditions.
  • the arrangement of the invention is advantageous in that plan view yaw instability, as often occurs with a vehicle of this general type when being moved at high speed under low load conditions, is countered without the need to add additional yaw stability dampers. Rather, the secondary springs and fixed rate lateral damper that would typically be provided are substituted for lower stiffness secondary springs and a variable damper, and control lines are added to allow control over the operation of the variable damper.
  • the bogie in accordance with the invention may be of substantially the same weight as a traditional bogie as the only significant additional weight will arise from the provision of a length of hydraulic line providing a connection between the damper and the brake switch over valve. Yaw stability is enhanced without the need to provide a heavy yaw damper.
  • the weight of the bogie is not significantly increased, it will be appreciated that the benefit of the invention are achieved without the need to restrict the load carrying capacity of a wagon or the like incorporating the bogie.
  • the invention may be retrofitted to existing bogies in a relatively straightforward manner.
  • the length of the bogie may be reduced.
  • overall vehicle length may also be reduced, and this may allow trains to be formed form an increased number of vehicles, leading to an increase in capacity.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)
EP17020475.4A 2017-10-16 2017-10-16 Bogie Withdrawn EP3470294A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17020475.4A EP3470294A1 (fr) 2017-10-16 2017-10-16 Bogie

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17020475.4A EP3470294A1 (fr) 2017-10-16 2017-10-16 Bogie

Publications (1)

Publication Number Publication Date
EP3470294A1 true EP3470294A1 (fr) 2019-04-17

Family

ID=60138157

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17020475.4A Withdrawn EP3470294A1 (fr) 2017-10-16 2017-10-16 Bogie

Country Status (1)

Country Link
EP (1) EP3470294A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2660129A (en) * 1950-01-06 1953-11-24 Holland Co Truck damping device
US5551765A (en) * 1995-06-22 1996-09-03 Westinghouse Air Brake Company Electric brake control system and method for railroad car
GB2332410A (en) * 1997-05-24 1999-06-23 Powell Duffryn Standard Ltd Bogie truck for rail vehicles
EP1093548A1 (fr) 1998-07-08 2001-04-25 Trelleborg Ab Support elastomere
US20150183443A1 (en) * 2012-06-29 2015-07-02 Hitachi Automotive Systems, Ltd. Force generation mechanism

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2660129A (en) * 1950-01-06 1953-11-24 Holland Co Truck damping device
US5551765A (en) * 1995-06-22 1996-09-03 Westinghouse Air Brake Company Electric brake control system and method for railroad car
GB2332410A (en) * 1997-05-24 1999-06-23 Powell Duffryn Standard Ltd Bogie truck for rail vehicles
EP1093548A1 (fr) 1998-07-08 2001-04-25 Trelleborg Ab Support elastomere
US20150183443A1 (en) * 2012-06-29 2015-07-02 Hitachi Automotive Systems, Ltd. Force generation mechanism

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