EP0778191A2 - Dispositif pour l'application simultane d'une force par des actuateurs hydrauliques arrangées en série - Google Patents

Dispositif pour l'application simultane d'une force par des actuateurs hydrauliques arrangées en série Download PDF

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Publication number
EP0778191A2
EP0778191A2 EP96440107A EP96440107A EP0778191A2 EP 0778191 A2 EP0778191 A2 EP 0778191A2 EP 96440107 A EP96440107 A EP 96440107A EP 96440107 A EP96440107 A EP 96440107A EP 0778191 A2 EP0778191 A2 EP 0778191A2
Authority
EP
European Patent Office
Prior art keywords
hydraulic
switch
force
hydraulic fluid
series
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
EP96440107A
Other languages
German (de)
English (en)
Other versions
EP0778191A3 (fr
EP0778191B1 (fr
Inventor
Kurt Vogelgsang
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.)
Alcatel Lucent SAS
Original Assignee
Alcatel SA
Alcatel Alsthom Compagnie Generale dElectricite
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 Alcatel SA, Alcatel Alsthom Compagnie Generale dElectricite filed Critical Alcatel SA
Publication of EP0778191A2 publication Critical patent/EP0778191A2/fr
Publication of EP0778191A3 publication Critical patent/EP0778191A3/fr
Application granted granted Critical
Publication of EP0778191B1 publication Critical patent/EP0778191B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/04—Special measures taken in connection with the properties of the fluid
    • F15B21/045—Compensating for variations in viscosity or temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L5/00—Local operating mechanisms for points or track-mounted scotch-blocks; Visible or audible signals; Local operating mechanisms for visible or audible signals
    • B61L5/04—Fluid-pressure devices for operating points or scotch-blocks

Definitions

  • the invention relates to a device according to the preamble of claim 1.
  • a device can e.g. for switching railway switches with large radii, the tongues of which must be subjected to actuating force at several points during the actuating process, are used and is known in this use under the term "hydraulic linkage".
  • a single pump unit is sufficient to operate a switch, even if it is an extremely slim switch with very long switch tongues.
  • the invention is therefore based on the object of improving a device according to the preamble of claim 1 such that external influences, in particular temperature changes, can no longer cause any significant pressure changes in the parts of the hydraulic system located between the actuating units.
  • the controllable valves provided according to the invention which are open when the device is in the idle state and establish a connection to the hydraulic fluid reservoir, can result in changes in the fluid volumes which occur in the parts of the hydraulic pressure distribution system which have hitherto been closed and are located between the actuating units and in the actuating device spaces connected to them , compensate, excess hydraulic fluid flowing into the hydraulic fluid reservoir when the hydraulic fluid expands, while hydraulic fluid is drawn in from the hydraulic fluid reservoir when the volume of the hydraulic fluid is reduced. As a result, higher overpressures or underpressures can no longer build up in the parts of the hydraulic system located between the control units.
  • the controllable valves are closed and allow the pressure build-up required in operation in the parts of the hydraulic system which are then hermetically sealed and connect the actuating units to one another.
  • claim 2 describes the device according to the invention in connection with a switch driven by the device. Since switches are exposed to large temperature differences outdoors, the advantages of the solution according to the invention are particularly evident here.
  • Claims 3 and 4 relate to the type and connection of the valves used.
  • the common connection with the hydraulic pump motor saves separate switching means.
  • Claim 5 finally, relates to the possibility of including hydraulic actuators that are not involved in the operation of the switch tongues, such as to include the drive of a switch frog in the hydraulic series connection of the actuating units driving the switch tongues and to protect a hydraulic connection between the switch tongue drive and the frog actuating unit against overpressure or underpressure.
  • the figure shows schematically the device according to the invention, used to actuate a switch tongue WZ.
  • the switch tongue WZ is part of a slim switch W with a large radius of curvature. In order to avoid bending of the switch tongue when placing it, it is subjected to force at two points P1 and P2 at the same time.
  • Two double-acting hydraulic working cylinders Z1 and Z2 serve as the power source, which can exert force on the switch tongue both in the pushing direction and in the pulling direction.
  • Both working cylinders are hydraulically connected in series, i.e. the hydraulic fluid volume displaced in cylinder Z1 is used to drive the downstream cylinder Z2.
  • Cylinder Z1 is pressurized by a hydraulic unit H consisting of electric motor M and pump P via a pressure line L1.
  • a pressure relief valve V1 is connected to the pressure line L1 and opens when an adjustable pressure corresponding to a predetermined actuating force is exceeded.
  • the volume displaced by the piston K in the cylinder Z1 is pressed into the cylinder Z2 via the pressure line L3 and sets its piston in motion. Because of the incompressibility of the hydraulic fluid, the movement of the two pistons is synchronous.
  • the forces exerted by the cylinders on the switch tongue thus act simultaneously. Their size and the distance traveled by the pistons of the working cylinders, which is coordinated with the travel of the switch tongue at the respective force application point, depend on the geometric dimensions of the cylinders.
  • the volume of liquid displaced in cylinder Z2 flows back into the pump via a pressure line L2.
  • the reversible pump P presses hydraulic fluid in the opposite direction via the pressure line L2 into the working cylinder Z2.
  • the volume displaced there is pressed via line L3 into working cylinder Z1.
  • the volume displaced in cylinder Z1 is returned to the pump via line L1.
  • the solenoid valve V3 which connects the pressure line L3 running between the two working cylinders Z1 and Z2 directly to the hydraulic fluid container via a line L4.
  • the device described here is not limited to two actuating units connected in series. There can also be many more such hydraulic actuators in series. In this case, each closed area of the hydraulic system lying between two actuating units must have a connecting line to the hydraulic fluid container and a solenoid valve that opens and closes it.
  • the elements actuated by the device can also have different functions and do not necessarily have to be connected to a railway switch.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Vehicle Body Suspensions (AREA)
EP96440107A 1995-12-08 1996-12-06 Dispositif pour l'application simultane d'une force par des actuateurs hydrauliques arrangées en série Expired - Lifetime EP0778191B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19545784A DE19545784A1 (de) 1995-12-08 1995-12-08 Vorrichtung zur gleichzeitigen Kraftausübung mittels hydraulisch hintereinandergeschalteter hydraulisch er Stelleinheiten
DE19545784 1995-12-08

Publications (3)

Publication Number Publication Date
EP0778191A2 true EP0778191A2 (fr) 1997-06-11
EP0778191A3 EP0778191A3 (fr) 1999-05-19
EP0778191B1 EP0778191B1 (fr) 2002-07-24

Family

ID=7779521

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96440107A Expired - Lifetime EP0778191B1 (fr) 1995-12-08 1996-12-06 Dispositif pour l'application simultane d'une force par des actuateurs hydrauliques arrangées en série

Country Status (3)

Country Link
EP (1) EP0778191B1 (fr)
AT (1) ATE221012T1 (fr)
DE (2) DE19545784A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999051480A1 (fr) * 1998-04-07 1999-10-14 Vae Aktiengesellschaft Dispositif pour deplacer les elements mobiles d'aiguillages et de croisements
BG65297B1 (bg) * 2001-07-31 2007-12-28 Vae Eisenbahnsysteme Gmbh Устройство за преместване на стрелки
WO2008027662A1 (fr) * 2006-08-28 2008-03-06 General Electric Company Moteur hydraulique pour aiguillages de chemin de fer
WO2011127875A3 (fr) * 2010-04-14 2012-05-18 DT- VÝHYBKÁRNA A STROJĺRNA A.S. Équipement hydraulique d'un dispositif de verrouillage muni de cylindres hydrauliques raccordés en parallèle, pour le réglage de lames d'aiguille d'un branchement de chemin de fer
CN110701121A (zh) * 2019-11-07 2020-01-17 中国铁道科学研究院集团有限公司通信信号研究所 一种电液转辙机用一体式液压单元

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1004924B (de) * 1952-01-25 1957-03-21 Anton Joseph Van Broekhoven Hydraulische Presse oder Schere mit Parallelfuehrung des Pressbalkens
US3433123A (en) * 1967-09-28 1969-03-18 Hastings Dynamold Corp Hydraulic drive system
DE1952823C3 (de) * 1969-10-21 1975-08-21 Standard Elektrik Lorenz Ag, 7000 Stuttgart Einrichtung zum Umstellen von Schlankweichen in Eisenbahnanlagen
DE2144564A1 (de) * 1971-09-06 1973-03-15 Siemens Ag Weichenstellsystem fuer eisenbahnanlagen mit schlankweichen
FR2271098A2 (en) * 1973-10-26 1975-12-12 Theissen Jacques Railway points actuation mechanism - has four-way distributor/reverser valves between pump and actuating rams
IN147860B (fr) * 1977-02-03 1980-07-26 Westinghouse Brake & Signal
US4428552A (en) * 1981-05-04 1984-01-31 Abex Corporation Railroad switch machine
IT1242226B (it) * 1990-10-10 1994-03-03 Sasib Spa Dispositivo di manovra per deviatoi ferroviari, in particolare per linee ad alta velocita'
DE4136881A1 (de) * 1991-11-09 1993-05-13 Butzbacher Weichenbau Gmbh Verfahren zum verstellen einer ersten schiene zu einer zweiten schiene
US5320047A (en) * 1992-03-06 1994-06-14 Monarch Hydraulics, Inc. Desk having self-releveling height adjustment and hydraulic circuit therefor

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999051480A1 (fr) * 1998-04-07 1999-10-14 Vae Aktiengesellschaft Dispositif pour deplacer les elements mobiles d'aiguillages et de croisements
US6402095B1 (en) 1998-04-07 2002-06-11 Vae Aktiengesellschaft Device for displacing the moveable parts of rail switches or crossings
AU750225B2 (en) * 1998-04-07 2002-07-11 Vae Aktiengesellschaft Device for displacing the moveable parts of rail switches or crossings
CZ298927B6 (cs) * 1998-04-07 2008-03-12 Vae Aktiengesellschaft Zarízení k prestavování pohyblivých cástí kolejových výhybek nebo križovatek
BG65297B1 (bg) * 2001-07-31 2007-12-28 Vae Eisenbahnsysteme Gmbh Устройство за преместване на стрелки
WO2008027662A1 (fr) * 2006-08-28 2008-03-06 General Electric Company Moteur hydraulique pour aiguillages de chemin de fer
US8302915B2 (en) 2006-08-28 2012-11-06 General Electric Company Hydraulic motor for railway switches
CN101506024B (zh) * 2006-08-28 2013-06-12 通用电气公司 用于铁路转辙机的液压马达
WO2011127875A3 (fr) * 2010-04-14 2012-05-18 DT- VÝHYBKÁRNA A STROJĺRNA A.S. Équipement hydraulique d'un dispositif de verrouillage muni de cylindres hydrauliques raccordés en parallèle, pour le réglage de lames d'aiguille d'un branchement de chemin de fer
CN110701121A (zh) * 2019-11-07 2020-01-17 中国铁道科学研究院集团有限公司通信信号研究所 一种电液转辙机用一体式液压单元

Also Published As

Publication number Publication date
EP0778191A3 (fr) 1999-05-19
DE59609478D1 (de) 2002-08-29
DE19545784A1 (de) 1997-06-12
ATE221012T1 (de) 2002-08-15
EP0778191B1 (fr) 2002-07-24

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