US3513781A - Oil leakage collecting means for railway speed control means - Google Patents

Oil leakage collecting means for railway speed control means Download PDF

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Publication number
US3513781A
US3513781A US706288A US3513781DA US3513781A US 3513781 A US3513781 A US 3513781A US 706288 A US706288 A US 706288A US 3513781D A US3513781D A US 3513781DA US 3513781 A US3513781 A US 3513781A
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Prior art keywords
piston
oil
sleepers
duct
units
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Expired - Lifetime
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US706288A
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English (en)
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Heinrich Schulte
Gunter Meschonat
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
    • B61K7/00—Railway stops fixed to permanent way; Track brakes or retarding apparatus fixed to permanent way; Sand tracks or the like

Definitions

  • the present -invention relates to apparatus for regulating the speed of railway or railroad stock comprising hydraulic piston and cylinder units which are mounted in the railway track, and whose pistons are connected with movable abutments for contacting the wheels of the rolling stock for transmission of kinetic energy to vthe stock when it is mo'ving below a target speed, and removing kinetic energy from the stock when it is moving at a speed above the target speed, the energy in each case being transmitted further by liquid in the cylinders of the units.
  • a further disadvantage is that the piston and cylinder units are mounted between the sleepers or cross-ties of the track and the associated hydraulic ducts must be mounted in the ballast under the sleepers.
  • Such apparatus is generally used in shunting yards in which the frequency of operation of the pistons of the piston and cylinder units is high and there is considerable wear, partially owing to the loading of the pistons from the side and not in the axial direction. Derailments may also occur which will be extremely likely to lead to leakages of oil if the units are struck by the derailed rolling stock. A further cause of oil leakage is that owing to the lo'w temperatures occurring in winter, it is necessary to use a flowing oil which Will become so thin when the weather is warmer that it will readily escape past the seals of the apparatus.
  • One object of the present invention is to avoid these disadvantages of known apparatus.
  • the invention accordingly consists in an apparatus for regulating the speed of railway rolling stock, comprising hydraulic piston and cylinder units, which are mounted in a railway track, and Whose pistons are connected with movable abutments for contacting the wheels of rolling stock for transmission of kinetic energy to the stock when it is moving below a target speed, and removing kinetic energy from the stock when it is moving at a speed above the target speed, the energy in each case being transmitted further by liquid in the cylinders of the units, characterized in that the units are mounted in sleepers forming part of the track, and in that the apparatus further comprises leakage oil collecting means in the sleepers for catching any leakage oil from the units, leakage oil collecting duct means in the sleepers, and
  • the leakage oil duct means being connected with the icc means connecting the duct means of a number of sleepers together for leading the oil away.
  • the apparatus comprises upright piston rod means connected with the kpistons of the units, and circular upwardly open dish means arranged around the piston rods for catching oil, the dish means being connected with the leakage oil duct means.
  • the apparatus comprises a number of pot means in which the piston and cylinder units are severally mounted, pot means for removing leakage oil from them.
  • Means can be provided for transforming pneumatic pressure into hydraulic pressure so that the sleepers can be connected with air supply line instead of with hydraulic supply line.
  • a pneumatic pressure supply means associated with each piston of a piston and cylinder unit a pneumatic pressure supply means, a pneumatic pressure control valve means, a pressure-transformer piston having a larger and a smaller face defining respectively parts of chambers for air and liquid, the piston arranged to be acted by air under pressure coming through the supply line means and the lvalve means on its larger face, and having its smaller face connected hydraulically with the piston of one of the piston and cylinder units, the pneumatic pressure control valve means being connected mechanically with the pressure reducing piston for the opening of passage means, in the valve, connecting the supply line with the larger face of the piston when the latter is moved in a direction decreasing the volume of the chamber which it in part defines.
  • the apparatus can further comprise a non-return valve and, connected in parallel to it, a choke, the non-return valve being arranged to check flow of liquid from the pist0n and cylinder unit mentioned above to the smaller face of the associated pressure-transforming piston and to open for flow in the reverse direction.
  • the apparatus can comprise means for lowering the piston and cylinder units so as not to make contact with the Iwheels of rolling stock, and 'means for the central control of the lowering means.
  • FIG. l is a diagrammatic sectionalong a sleeper of a railway track
  • FIG. 2 is a section on the line II-II of FIG. 1;
  • FIG. 3 is a diagrammatic plan view of what is shown in FIGS. 1 and 2;
  • FIG. 4 is a section, on a larger scale, of a further embodiment of the invention.
  • reference numeral 2 represents ballast carriedl on a substratum 1.
  • ballast 2 sleepers or cross-ties 3 are arranged on which the rail 4 of the permanent way are attached by means which are not specially shown. Adjacent to the inside edge of y each rail there are hydraulic piston and cylinder control units denoted by general reference numeral 5.
  • These units each comprise a cylinder 6 and a piston in it which can move vertically.
  • The-piston rod 7 of the piston is connected at its top end to an abutment or head 8 which is specially shaped to make contact with the anges of rolling stock wheels for movement of the piston in a vertical direction and transmission of kinetic energy to or from the rolling stock in accordance with whether rolling stock is running at a speed below or above a target speed.
  • the piston and cylinder units are connected with a known control means for acceleration or deceleration of the rolling stock, by causing transmission of kinetic energy to a rolling stock wheel on the upstroke of the piston and absorption of energy from the rolling stock on the downward stroke of the piston when the rolling stock is moving at an excessive speed, the actuation of the abutment 8 being caused in each case by the ange of the rolling stock wheel.
  • the -piston and cylinder control units can be arranged in sets of four or six per sleeper or cross-tie 3 instead of in sets of two as shown. There is alsothe possibility of arranging the units in sleepers running along the length of the railway track along the outsides of the rails.
  • the whole or part of the supply and return ducts for the hydraulic lmedium can be arranged in the sleepers, for instance when the piston and cylinder units are arranged in sleepers extending along the track, or parts of the ducts can be arranged between tracks without being contained in sleepers.
  • a central hydraulic pressure installation is provided arranged away from the track and connected with the piston and cylinder units by supply and return ducts 10 and 11, respectively. These ducts are laid in a prefabricated concrete channel 12 closed by a slab 13. The channel also contains a leakage oil duct 14.
  • connection for connecting parts 10a, 11a, 14a, and 10b, 11b, and 14b of the ducts with the ducts 10, 11 and 14 in the channel.
  • the ducts 14 are connected with an upwardly open dish 15 arranged around the piston rod 7 for catching oil which leaks past a seal around the piston rod.
  • the hydraulic piston and cylinder units 5 are not fixed to the track.
  • pots 16 in the sleepers 3 which are closed at their bottom ends and surround piston and cylinder units 5 so as to leave annular spaces 17, 18 around the cylinders. These spaces are sealed off by O-rings and are connected with the ducts 10 and 11 so that the connections or pots of the cylinders 6 are connected with these ducts for operation of the pistons in the cylinders.
  • FIG. 4 there is a similar piston -and cylinder unit 5 with a cylinder 6, a piston rod 7 and an abutment or head 8.
  • FIG. 4 diers from that shown in FIGS. l, 2, and 3 in that the entire hydraulic circuitry is contained in the sleeper and the transmission of energy to and from the sleepers for the acceleration and deceleration of the rolling stock takes place pneumatically, means for converting pneumatic into hydraulic pressure being provided in the sleepers themselves.
  • the means for collecting leakage oil of the embodiment shown in FIGS. 1, 2, and 3 are not shown in FIG. 4.
  • a pressure transformer denoted by general reference numeral 21 with control valve 22 to be explained presently.
  • At the end of the sleeper also not shown, there is a connection for the hydraulic duct 22a to a central control station.
  • the cylinder y6 is connected at its bottom end witth an oil pressure duct 71 which passes through a check valve 72 which is connected in parallel with a choke 73.
  • the check valve 72 is connected on its other side with the high pressure piston chamber 24 of the piston type pressure converter 21.
  • the piston 26 of this converter has smaller highpressure face 25 dening, in part, the chamber 24 while the upper larger face 26 of the piston defines, in part, the chamber 27.
  • the control valve 22 consists/vof a slide or plunger 74 which is urged to the left by a loading spring 75 whose right-hand end can be set by means of a screw 76 for adjusting the pressure exerted by the spring on the plunger 74.
  • a loading spring 75 whose right-hand end can be set by means of a screw 76 for adjusting the pressure exerted by the spring on the plunger 74.
  • On the other end of the plunger 74 we provide a ⁇ stem 77 which can be cammed to the right by engaging an oblique face von the edge of the piston face 26 when the pistonmoves upwards.
  • a duct 78 opens into the chamber 27 while a duct ⁇ 79 opens in the side wall of the chamber 27
  • the duct v78 connects thetop of the chamber 27 with a port in the sleeve around the plunger 74 and, when a groove in the plunger is in the position as shown in the figure, this port is connected with an outlet port opening to the atmosphere through 'a choke valve 81 and short duct 80.
  • valve 74 a different form of valve or membrane control system can be used.
  • Centrally controlled means can be provided for causing lowering of the piston and cylinder units so as not to make Contact with wheel anges, i.e., so as to be out of operation.
  • the principal advantage of the invention is that leakage oil losses due to damage of the supply and return ducts for the oil are substantially avoided and the leakage oil does not escape into the earth.
  • the sleepers tobe used in the invention can be tted with the piston and cylinder units in the factory so that they can be connected to the ducts when they have been laid.
  • an apapratus for regulating the speed of railway rolling stock embodying hydraulic piston and cylinder units associated with a railway track, and the pistons having movable abutments adapted to contact the Wheels of rolling stock for transmission of kinetic energy to the stock when it is moving below ⁇ a target speed, and removing kinetic energy from the stock when it is moving at a speed above the target speed, the energy in each case being transmitted further by liquid in the cylinders of the units, the improvement which comprises sleepers or cross ties forming part of the track, means including vertical cavities in said sleepers or cross ties for receiving said units respectively, and oil collecting means embodied in said sleepers or cross ties and including piping extending from said receiving means for conducting leakage oil away from said sleepers.
  • Apparatus as claimed in claim 1 comprising up and down piston and cylinder units in the sleepers or cross ties, piston rod means connected to said pistons, means on said piston rods for catching oil consisting of upwardly open dish means on the upper portion of said piston rods, and conduit means extending through said sleepers or cross ties for conducting oil away from said dish means.
  • Apparatus as claimed in claim 1 comprising pots embedded in the sleepers or cross ties for said piston and cylinder units respectively, and said piping leading from said pots for conducting away leakage oil.
  • An apparatus further comprising, associated with each piston of a piston and cylinder unit, a pneumatic pressure supply means, a pneumatic pressure control valve means, 'a pressure-transforming piston having a larger and a smaller face defining respectively parts of chambers for air and liquid, the piston arranged to be acted by air under pressure coming through the supply line means and the valve means on its larger face, and having its smaller face connected hydraulically with the piston of one of the piston and cylinder units, the pneumatic pressure control valve means being connected mechanically with the pressuretransforming piston for the opening of passage means, in the valve, connecting the supply line with the larger face of the piston When the latter is moved in a direction decreasing the volume of the chamber which it in part defines.
  • An apparatus further comprising a nonreturn valve and, connected in parallel to it, a choke, the nonreturn valve being arranged to check flow of liquid from the piston and cylinder unit mentioned in claim 4 to the smaller face of the associated pressure-transforming piston and to open for ow in the reverse direction.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Actuator (AREA)
  • Regulating Braking Force (AREA)
US706288A 1967-02-28 1968-02-19 Oil leakage collecting means for railway speed control means Expired - Lifetime US3513781A (en)

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DEK0061543 1967-02-28

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US (1) US3513781A (en))
AT (2) AT292783B (en))
BE (1) BE711384A (en))
CH (1) CH495867A (en))
DE (1) DE1605349A1 (en))
FR (1) FR1558007A (en))
GB (1) GB1208494A (en))

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4130064A (en) * 1976-12-20 1978-12-19 Bridwell Phillip P Energy generating system for a roadway or railway
CN100389037C (zh) * 2005-03-29 2008-05-21 杨恩久 自能源可控停车器
CN102530020A (zh) * 2011-12-13 2012-07-04 杨振洲 矿井斜巷远距离嵌入式风动挡车装置

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3031173C2 (de) * 1980-08-18 1982-10-28 Thyssen Industrie AG Umformtechnik/Bergbautechnik, 4100 Duisburg Hydraulische Kolbengleisbremse zum Abbremsen von Eisenbahnwagen
DE3037982A1 (de) * 1980-10-08 1982-04-29 Thyssen Industrie AG Umformtechnik/Bergbautechnik, 4100 Duisburg Hydraulische kolbengleisbremse zum abbremsen von eisenbahnwagen
DE3119861C2 (de) * 1981-05-19 1984-04-05 Thyssen Industrie AG Schmiedetechnik/Bergbautechnik, 4100 Duisburg Hydraulische Kolbengleisbremse zum Abbremsen von Eisenbahnwagen
FR3088793B1 (fr) 2018-11-16 2020-10-30 Continental Automotive France Procede et dispositif de detection d'un dispositif portable pour acces " mains libres " a un vehicule automobile
FR3092723B1 (fr) 2019-02-12 2021-11-12 Continental Automotive Procédé et dispositif de détection d’un mouvement particulier d’un terminal mobile à proximité d’un véhicule pour permettre l’accès audit véhicule

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3040676A (en) * 1959-05-11 1962-06-26 Dowty Hydraulic Units Ltd Apparatus for controlling the velocity of wheeled vehicles
US3266792A (en) * 1963-11-08 1966-08-16 Lemert Engineering Co Vehicle shock stabilizer
US3373699A (en) * 1965-07-30 1968-03-19 Dowty Mining Equipment Ltd Hydraulic devices for controlling the speed of wheeled vehicles
US3381628A (en) * 1965-09-16 1968-05-07 Dowty Technical Dev Ltd Wagon speed-control system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3040676A (en) * 1959-05-11 1962-06-26 Dowty Hydraulic Units Ltd Apparatus for controlling the velocity of wheeled vehicles
US3266792A (en) * 1963-11-08 1966-08-16 Lemert Engineering Co Vehicle shock stabilizer
US3373699A (en) * 1965-07-30 1968-03-19 Dowty Mining Equipment Ltd Hydraulic devices for controlling the speed of wheeled vehicles
US3381628A (en) * 1965-09-16 1968-05-07 Dowty Technical Dev Ltd Wagon speed-control system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4130064A (en) * 1976-12-20 1978-12-19 Bridwell Phillip P Energy generating system for a roadway or railway
CN100389037C (zh) * 2005-03-29 2008-05-21 杨恩久 自能源可控停车器
CN102530020A (zh) * 2011-12-13 2012-07-04 杨振洲 矿井斜巷远距离嵌入式风动挡车装置
CN102530020B (zh) * 2011-12-13 2015-01-21 杨振洲 矿井斜巷远距离嵌入式风动挡车装置

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AT292783B (de) 1971-09-10
DE1605349A1 (de) 1971-03-11
FR1558007A (en)) 1969-02-21
AT277313B (de) 1969-12-29
CH495867A (de) 1970-09-15
BE711384A (en)) 1968-07-01
GB1208494A (en) 1970-10-14

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