EP0956390A1 - Curve path of a switch, and track joint using this type of curve path - Google Patents
Curve path of a switch, and track joint using this type of curve pathInfo
- Publication number
- EP0956390A1 EP0956390A1 EP97955078A EP97955078A EP0956390A1 EP 0956390 A1 EP0956390 A1 EP 0956390A1 EP 97955078 A EP97955078 A EP 97955078A EP 97955078 A EP97955078 A EP 97955078A EP 0956390 A1 EP0956390 A1 EP 0956390A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- curve
- curvature
- switch
- point
- beginning
- 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
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B2/00—General structure of permanent way
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B7/00—Switches; Crossings
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B2204/00—Characteristics of the track and its foundations
- E01B2204/15—Layout or geometry of the track
Definitions
- the invention relates to a curve of a switch with switch tongues, a main track and a branch track, the curve from the beginning of the curve to the end of the curve
- R is the radius of curvature
- WO 95/31604 shows a curve for the course of rails from the main track to a branch track, in which likewise starting from a first end section with a radius of curvature towards infinity, the other end of the turnout in turn with a radius towards infinite ends is to avoid additional vibrations that can interfere with vehicles.
- a curve was chosen which is composed of three sections, three sections of approximately the same length being used. Starting from a curvature with a radius of curvature that tends towards infinity, a middle section with constant curvature is selected, the radius of which is a minimum over the curve.
- the course of two conventional tional clothoid with an intermediate section in the form of an arc of a circle is selected from the course of two conventional tional clothoid with an intermediate section in the form of an arc of a circle.
- the curvature 1 / R defines a dimensionless curvature coefficient ⁇ , which is equal to the quotient of the current curvature 1 / R and the maximum curvature l / Rmin, the maximum curvature in turn resulting from the quotient 1 by the minimum radius .
- ⁇ can assume values between 0 and 1, so at the points where ⁇ is 0, the radius tends towards infinity, since the minimum radius has a finite value.
- this coefficient ⁇ takes the value 1.
- a coefficient v is defined below, which relates the distance between the point of the curve in question and the start of the curve to the total length of the curve.
- v is thus 0 at the start of the curve and 1 at the end of the curve and takes any values between 0 and 1 in direct proportion to the distance from the start of the curve.
- a switch which is mainly driven in one direction is designed with particular advantage such that for a switch used with a point C_A between 0 and 0.5, 06E between 0.5 and 1 and v for ⁇ m ⁇ between 0.4 and 1 and not equal to 0 , 5 is selected and that CCA between 0.3 and 0.7, CE between 0 and 0.5 and V for m ax between 0.3 and ⁇ 0.5 is selected for a dull switch.
- the values for the various curve geometries given above for the different directions of travel have been optimized with regard to minimum lateral acceleration and intake jerk as well as less wear and tear and small wheel rail forces.
- a low lateral acceleration and inlet jerk ensure a high level of comfort when driving the switch, low wear and small wheel rail forces enable the switch to have a long service life.
- the design according to the invention is such that one and only one point of maximum curvature or with a minimum radius with v ⁇ 0.5 is provided between the beginning of the curve and the end of the curve.
- the departure from the previously chosen symmetry as proposed, for example, in WO 95/31604, is associated with a significant improvement in comfort and a reduction in wear.
- the curve geometry can have the shape of an apex clothoid in the curved course, where v assumes a value of ⁇ 0.5 in accordance with the definition selected in the case of using such an apex clothoid.
- the design is such that the sections of clothoids and / or cosinoids which are different from the circular arc shape are formed. If, as already mentioned above, the direction of travel is also taken into account in the considerations of the turnout geometry, the curve geometry is particularly advantageously defined such that the point with a maximum amount of curvature is arranged at the end of the turn in the case of a turnout which is driven to a point.
- the curve according to the invention is particularly suitable for the formation of track connections which are to be traveled at high speeds.
- a track connection according to the invention using switches of the type mentioned at the beginning, which are used on both sides, is preferably designed in such a way that the curve ends merge with a CCE between 0 and 0.5 into a straight-line connection section.
- the track connection is made in a particularly preferred manner such that the straight section has a length of 5 to 30% of the total length Lg e s of a curve.
- This straight-line connection section in the ratio of 5 to 30% of the total length of a curve train results in a significantly increased calming of the vehicle run.
- turnout geometries according to the invention can thus be used above all for track connections which are used at high speed, the combination of different turnout geometries according to the invention, as defined above, ensuring significantly lower wear and a significantly longer service life.
- FIG. 1 shows a schematic top view of a conventional track connection, in which two branch tracks merge into an essentially straight-line intermediate section using a constant radius of curvature.
- the associated diagram is shown in FIG. 1
- FIG. 3 instead of the curvature, the dimensionless curvature coefficient ⁇ is plotted over the length of a track connection with the curves according to the invention, FIG. 4 shows a single turn geometry of an apex clothoid, ⁇ being plotted against v, and FIG. 5 shows an analog representation for a cosinoid and FIGS. 6 to 8 show the values for special designs of switches.
- Fig. 1 the main track is denoted by 1
- the length of the curve in question is denoted by Lges in the illustration of FIG. 2.
- 1 and 2 a conventional curve geometry according to the prior art has been shown, the branch tracks 2 branching off with a constant radius and merging into a straight-line central section 3. The change in curvature - 1 over the
- Length L of the track connection can be seen directly from FIG. 2.
- Embodiment has a value of about 0.2 to 0.3, the straight section extending to the end of the second curve at V5. At this point the clothoid with dull traffic was again formed with a 0.5 ⁇ 0, so that here too there is a discontinuous transition into the curve of the subsequent switch.
- the second switch of this track connection is designed mirror-symmetrically like the asymmetrically constructed first switch, so that here again a clothoid 6 is provided in the inlet area and a circular arc section 5 is connected to Vß, which opens into a clothoid 4.
- the apex clothoid 7 for the pointed passage has its maximum curvature or its maximum ⁇ at the
- the apex clothoid deviates from the training during the point crossing ⁇ i ⁇
- ⁇ increases with this vertex-clothoid geometry, which is particularly advantageous for stump traversing, up to position V2 and reaches the maximum ⁇ 2 closer to the beginning of the curve with blunt traversal.
- 3 at position V3 is again selected to be greater than 0 and not equal to ⁇ i at position vi.
- ⁇ i is at position v 1 ° and passes through a maximum at position V2 with the value ⁇ 2.
- the change in the radius of the curve continues until point V3 on the end of the cosinoids facing away from the tongue, where ⁇ 3 assumes a value different from ⁇ i and different from 0.
- V2 is again off-center between vi and V3, which achieves the desired effects in terms of wear reduction and comfort improvement.
- ⁇ A denote the curvature coefficients at the beginning of the curve
- ⁇ the curvature coefficients at the end of the curve
- the hatched line determines the area which should be more practicable due to the practical feasibility.
- the full line determines the optimal solution area.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Train Traffic Observation, Control, And Security (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
- Catching Or Destruction (AREA)
- Preliminary Treatment Of Fibers (AREA)
- Toys (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
- Image Analysis (AREA)
- Platform Screen Doors And Railroad Systems (AREA)
- Sewing Machines And Sewing (AREA)
- Push-Button Switches (AREA)
- Navigation (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT97955078T ATE233347T1 (en) | 1996-12-23 | 1997-12-12 | CURVE OF A SWITCH AND TRACK CONNECTION USING SUCH A CURVE |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0225496A AT404743B (en) | 1996-12-23 | 1996-12-23 | CURVE OF A SOFT AND TRACK CONNECTION USING SUCH A CURVE |
AT225496 | 1996-12-23 | ||
PCT/AT1997/000276 WO1998028492A1 (en) | 1996-12-23 | 1997-12-12 | Curve path of a switch, and track joint using this type of curve path |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0956390A1 true EP0956390A1 (en) | 1999-11-17 |
EP0956390B1 EP0956390B1 (en) | 2003-02-26 |
Family
ID=3530915
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97955078A Expired - Lifetime EP0956390B1 (en) | 1996-12-23 | 1997-12-12 | Curve path of a switch, and track joint using this type of curve path |
Country Status (15)
Country | Link |
---|---|
US (1) | US6371418B1 (en) |
EP (1) | EP0956390B1 (en) |
KR (1) | KR20000069684A (en) |
CN (1) | CN1114733C (en) |
AT (1) | AT404743B (en) |
AU (1) | AU719664B2 (en) |
CA (1) | CA2275768A1 (en) |
DE (1) | DE59709416D1 (en) |
ES (1) | ES2192280T3 (en) |
HU (1) | HUP0001072A3 (en) |
NO (1) | NO993100L (en) |
PL (1) | PL334563A1 (en) |
PT (1) | PT956390E (en) |
WO (1) | WO1998028492A1 (en) |
ZA (1) | ZA9711510B (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6751547B2 (en) * | 2001-11-26 | 2004-06-15 | Hrl Laboratories, Llc | Method and apparatus for estimation of forward path geometry of a vehicle based on a two-clothoid road model |
US7729819B2 (en) * | 2004-05-08 | 2010-06-01 | Konkan Railway Corporation Ltd. | Track identification system |
DE202009012104U1 (en) | 2009-09-04 | 2009-11-12 | Kuss, Joachim, Dipl.-Wirtsch.-Ing. | Wind turbine with radially adjustable rotor blades |
CH712173A2 (en) * | 2016-02-22 | 2017-08-31 | Swiss Transp Res Inst Ag | Crossover and rail network with at least one such crossover. |
JP6742522B2 (en) * | 2017-07-26 | 2020-08-19 | 三菱電機株式会社 | Transport path switching device and elevator device |
CN107740312B (en) * | 2017-09-28 | 2019-05-07 | 上海海事大学 | Rail operation handling machinery turning rail design method based on clothoid |
CN110373957A (en) * | 2019-07-30 | 2019-10-25 | 中国铁建重工集团股份有限公司道岔分公司 | Combinatorial switch structure |
CN114705148B (en) * | 2022-04-03 | 2023-10-24 | 国交空间信息技术(北京)有限公司 | Road bending point detection method and device based on secondary screening |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2051882C2 (en) * | 1970-10-22 | 1975-03-06 | Elektro-Thermit Gmbh, 1000 Berlin | Tongue switch with two pairs of tongues from track sections of the main and branch track |
HU197051B (en) | 1986-12-12 | 1989-02-28 | Magyar Allamvasutak Vezerigazg | Railway meeting station |
US4948073A (en) * | 1988-10-24 | 1990-08-14 | Kadee Metal Products, Co. | Turnout with closing frog |
IT1242226B (en) * | 1990-10-10 | 1994-03-03 | Sasib Spa | MANEUVERING DEVICE FOR RAILWAY SWITCHES, IN PARTICULAR FOR HIGH SPEED LINES |
US5375797A (en) * | 1993-09-17 | 1994-12-27 | Willow; Robert E. | Compound geometry rail switch |
DE4343395A1 (en) * | 1993-12-18 | 1995-06-22 | Magnetbahn Gmbh | Switch for routes of track-guided vehicles with linear motor drive |
DE4417069A1 (en) | 1994-05-16 | 1995-11-23 | Butzbacher Weichenbau Gmbh | Curve |
-
1996
- 1996-12-23 AT AT0225496A patent/AT404743B/en not_active IP Right Cessation
-
1997
- 1997-12-12 AU AU78743/98A patent/AU719664B2/en not_active Ceased
- 1997-12-12 CA CA002275768A patent/CA2275768A1/en not_active Abandoned
- 1997-12-12 ES ES97955078T patent/ES2192280T3/en not_active Expired - Lifetime
- 1997-12-12 PT PT97955078T patent/PT956390E/en unknown
- 1997-12-12 US US09/331,452 patent/US6371418B1/en not_active Expired - Fee Related
- 1997-12-12 HU HU0001072A patent/HUP0001072A3/en unknown
- 1997-12-12 DE DE59709416T patent/DE59709416D1/en not_active Expired - Fee Related
- 1997-12-12 PL PL97334563A patent/PL334563A1/en unknown
- 1997-12-12 CN CN97181844A patent/CN1114733C/en not_active Expired - Fee Related
- 1997-12-12 EP EP97955078A patent/EP0956390B1/en not_active Expired - Lifetime
- 1997-12-12 KR KR1019997005733A patent/KR20000069684A/en not_active Application Discontinuation
- 1997-12-12 WO PCT/AT1997/000276 patent/WO1998028492A1/en active IP Right Grant
- 1997-12-22 ZA ZA9711510A patent/ZA9711510B/en unknown
-
1999
- 1999-06-22 NO NO993100A patent/NO993100L/en not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO9828492A1 * |
Also Published As
Publication number | Publication date |
---|---|
US6371418B1 (en) | 2002-04-16 |
EP0956390B1 (en) | 2003-02-26 |
ES2192280T3 (en) | 2003-10-01 |
NO993100D0 (en) | 1999-06-22 |
AT404743B (en) | 1999-02-25 |
AU7874398A (en) | 1998-07-17 |
CN1114733C (en) | 2003-07-16 |
HUP0001072A2 (en) | 2000-08-28 |
AU719664B2 (en) | 2000-05-11 |
CN1246168A (en) | 2000-03-01 |
HUP0001072A3 (en) | 2002-01-28 |
CA2275768A1 (en) | 1998-07-02 |
DE59709416D1 (en) | 2003-04-03 |
PL334563A1 (en) | 2000-03-13 |
KR20000069684A (en) | 2000-11-25 |
ZA9711510B (en) | 1998-06-25 |
WO1998028492A1 (en) | 1998-07-02 |
PT956390E (en) | 2003-06-30 |
NO993100L (en) | 1999-08-20 |
ATA225496A (en) | 1998-06-15 |
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